From 706ed0e049fe008cac12f243371b67ee0230a08a Mon Sep 17 00:00:00 2001 From: Eugenio Lacuesta Date: Tue, 14 Jun 2016 12:34:07 -0300 Subject: [PATCH 001/889] Spider middleware: process_spider_exception on generators --- docs/topics/exceptions.rst | 11 + docs/topics/spider-middleware.rst | 10 +- scrapy/core/spidermw.py | 37 +++- scrapy/exceptions.py | 5 + tests/test_spidermiddleware.py | 340 ++++++++++++++++++++++++++++++ 5 files changed, 389 insertions(+), 14 deletions(-) create mode 100644 tests/test_spidermiddleware.py diff --git a/docs/topics/exceptions.rst b/docs/topics/exceptions.rst index cc02369d4..a3ff72827 100644 --- a/docs/topics/exceptions.rst +++ b/docs/topics/exceptions.rst @@ -62,6 +62,17 @@ remain disabled. Those components include: The exception must be raised in the component's ``__init__`` method. +InvalidOutput +------------- + +.. exception:: InvalidOutput + +This exception can be raised by a downloader or spider middleware to +indicate that some method returned a value not suported by the processing +chain. +See :ref:`topics-spider-middleware` and :ref:`topics-downloader-middleware` +for a list of supported output values. + NotSupported ------------ diff --git a/docs/topics/spider-middleware.rst b/docs/topics/spider-middleware.rst index 8360827e8..fc7669437 100644 --- a/docs/topics/spider-middleware.rst +++ b/docs/topics/spider-middleware.rst @@ -112,11 +112,12 @@ following methods: .. method:: process_spider_exception(response, exception, spider) - This method is called when a spider or :meth:`process_spider_input` - method (from other spider middleware) raises an exception. + This method is called when when a spider or :meth:`process_spider_input`/ + :meth:`process_spider_output` method (from other spider middleware) + raises an exception. :meth:`process_spider_exception` should return either ``None`` or an - iterable of :class:`~scrapy.http.Response`, dict or + iterable of :class:`~scrapy.http.Request`, dict or :class:`~scrapy.item.Item` objects. If it returns ``None``, Scrapy will continue processing this exception, @@ -125,7 +126,8 @@ following methods: exception reaches the engine (where it's logged and discarded). If it returns an iterable the :meth:`process_spider_output` pipeline - kicks in, and no other :meth:`process_spider_exception` will be called. + kicks in, starting with the last non-executed method, and no other + :meth:`process_spider_exception` will be called. :param response: the response being processed when the exception was raised diff --git a/scrapy/core/spidermw.py b/scrapy/core/spidermw.py index a206e4b0c..0f03a7b36 100644 --- a/scrapy/core/spidermw.py +++ b/scrapy/core/spidermw.py @@ -5,6 +5,7 @@ See documentation in docs/topics/spider-middleware.rst """ import six from twisted.python.failure import Failure +from scrapy.exceptions import InvalidOutput from scrapy.middleware import MiddlewareManager from scrapy.utils.defer import mustbe_deferred from scrapy.utils.conf import build_component_list @@ -40,31 +41,47 @@ class SpiderMiddlewareManager(MiddlewareManager): for method in self.methods['process_spider_input']: try: result = method(response=response, spider=spider) - assert result is None, \ - 'Middleware %s must returns None or ' \ - 'raise an exception, got %s ' \ - % (fname(method), type(result)) + if result is not None: + raise InvalidOutput('Middleware {} must return None or raise ' \ + 'an exception, got {}'.format(fname(method), type(result))) except: return scrape_func(Failure(), request, spider) return scrape_func(response, request, spider) def process_spider_exception(_failure): exception = _failure.value + # don't handle InvalidOutput exception + if isinstance(exception, InvalidOutput): + return _failure for method in self.methods['process_spider_exception']: result = method(response=response, exception=exception, spider=spider) - assert result is None or _isiterable(result), \ - 'Middleware %s must returns None, or an iterable object, got %s ' % \ - (fname(method), type(result)) + if result is not None and not _isiterable(result): + raise InvalidOutput('Middleware {} must return None or an iterable ' \ + 'object, got {}'.format(fname(method), type(result))) + # stop exception handling by handing control over to the + # process_spider_output chain if an iterable has been returned if result is not None: return result return _failure def process_spider_output(result): + def wrapper(result_iterable): + try: + for r in result_iterable: + yield r + except Exception as ex: + exception_result = process_spider_exception(Failure(ex)) + if exception_result is None or isinstance(exception_result, Failure): + raise + for output in exception_result: + yield output for method in self.methods['process_spider_output']: result = method(response=response, result=result, spider=spider) - assert _isiterable(result), \ - 'Middleware %s must returns an iterable object, got %s ' % \ - (fname(method), type(result)) + if _isiterable(result): + result = wrapper(result) + else: + raise InvalidOutput('Middleware {} must return an iterable object, ' \ + 'got {}'.format(fname(method), type(result))) return result dfd = mustbe_deferred(process_spider_input, response) diff --git a/scrapy/exceptions.py b/scrapy/exceptions.py index 4bcecd994..ba7272255 100644 --- a/scrapy/exceptions.py +++ b/scrapy/exceptions.py @@ -11,6 +11,11 @@ class NotConfigured(Exception): """Indicates a missing configuration situation""" pass +class InvalidOutput(TypeError): + """Indicates an invalid value has been returned + by a middleware's processing method""" + pass + # HTTP and crawling class IgnoreRequest(Exception): diff --git a/tests/test_spidermiddleware.py b/tests/test_spidermiddleware.py new file mode 100644 index 000000000..8ec9583d8 --- /dev/null +++ b/tests/test_spidermiddleware.py @@ -0,0 +1,340 @@ + +import logging + +from testfixtures import LogCapture +from twisted.trial.unittest import TestCase +from twisted.internet import defer + +from scrapy.spiders import Spider +from scrapy.item import Item, Field +from scrapy.http import Request +from scrapy.utils.test import get_crawler + + +class TestItem(Item): + value = Field() + + +# ================================================================================ +# exceptions from a spider's parse method +class BaseExceptionFromParseMethodSpider(Spider): + start_urls = ["http://example.com/"] + custom_settings = { + 'SPIDER_MIDDLEWARES': {'tests.test_spidermiddleware.CatchExceptionMiddleware': 540} + } + + +class NotAGeneratorSpider(BaseExceptionFromParseMethodSpider): + """ return value is NOT a generator """ + name = 'not_a_generator' + + def parse(self, response): + raise AssertionError + + +class GeneratorErrorBeforeItemsSpider(BaseExceptionFromParseMethodSpider): + """ return value is a generator; the exception is raised + before the items are yielded: no items should be scraped """ + name = 'generator_error_before_items' + + def parse(self, response): + raise ValueError + for i in range(3): + yield {'value': i} + + +class GeneratorErrorAfterItemsSpider(BaseExceptionFromParseMethodSpider): + """ return value is a generator; the exception is raised + after the items are yielded: 3 items should be scraped """ + name = 'generator_error_after_items' + + def parse(self, response): + for i in range(3): + yield {'value': i} + raise FloatingPointError + + +class CatchExceptionMiddleware(object): + def process_spider_exception(self, response, exception, spider): + """ catch an exception and log it """ + logging.warn('{} exception caught'.format(exception.__class__.__name__)) + return None + + +# ================================================================================ +# exception from a previous middleware's process_spider_input method +# process_spider_input is not expected to return an iterable, so there are no +# separate tests for generator/non-generator implementations +class FromPreviousMiddlewareInputSpider(Spider): + start_urls = ["http://example.com/"] + name = 'not_a_generator_from_previous_middleware_input' + custom_settings = { + 'SPIDER_MIDDLEWARES': { + # engine side + 'tests.test_spidermiddleware.CatchExceptionMiddleware': 540, + 'tests.test_spidermiddleware.RaiseExceptionOnInputMiddleware': 545, + # spider side + } + } + + def parse(self, response): + return None + + +class RaiseExceptionOnInputMiddleware(object): + def process_spider_input(self, response, spider): + raise LookupError + + +# ================================================================================ +# exception from a previous middleware's process_spider_output method (not a generator) +class NotAGeneratorFromPreviousMiddlewareOutputSpider(Spider): + start_urls = ["http://example.com/"] + name = 'not_a_generator_from_previous_middleware_output' + custom_settings = { + 'SPIDER_MIDDLEWARES': { + # engine side + 'tests.test_spidermiddleware.CatchExceptionMiddleware': 540, + 'tests.test_spidermiddleware.RaiseExceptionOnOutputNotAGeneratorMiddleware': 545, + # spider side + } + } + + def parse(self, response): + return [{'value': i} for i in range(3)] + + +class RaiseExceptionOnOutputNotAGeneratorMiddleware(object): + def process_spider_output(self, response, result, spider): + raise UnicodeError + + +# ================================================================================ +# exception from a previous middleware's process_spider_output method (generator) +class GeneratorFromPreviousMiddlewareOutputSpider(Spider): + start_urls = ["http://example.com/"] + name = 'generator_from_previous_middleware_output' + custom_settings = { + 'SPIDER_MIDDLEWARES': { + # engine side + 'tests.test_spidermiddleware.CatchExceptionMiddleware': 540, + 'tests.test_spidermiddleware.RaiseExceptionOnOutputGeneratorMiddleware': 545, + # spider side + } + } + + def parse(self, response): + return [{'value': i} for i in range(10, 13)] + + +class RaiseExceptionOnOutputGeneratorMiddleware(object): + def process_spider_output(self, response, result, spider): + for r in result: + yield r + raise NameError + + +# ================================================================================ +# do something useful from the exception handler +class DoSomethingSpider(Spider): + start_urls = ["http://example.com"] + name = 'do_something' + custom_settings = { + 'SPIDER_MIDDLEWARES': { + # engine side + 'tests.test_spidermiddleware.DoSomethingMiddleware': 540, + 'tests.test_spidermiddleware.CatchExceptionMiddleware': 545, + # spider side + } + } + + def parse(self, response): + yield {'value': response.url} + raise ImportError + + +class DoSomethingMiddleware(object): + def process_spider_exception(self, response, exception, spider): + return [Request('http://example.org'), {'value': 10}, TestItem(value='asdf')] + + +# ================================================================================ +# don't catch InvalidOutput from scrapy's spider middleware manager +class InvalidReturnValueFromPreviousMiddlewareInputSpider(Spider): + start_urls = ["http://example.com/"] + name = 'invalid_return_value_from_previous_middleware_input' + custom_settings = { + 'SPIDER_MIDDLEWARES': { + # engine side + 'tests.test_spidermiddleware.InvalidReturnValueInputMiddleware': 540, + 'tests.test_spidermiddleware.CatchExceptionMiddleware': 545, + # spider side + } + } + + def parse(self, response): + return None + + +class InvalidReturnValueInputMiddleware(object): + def process_spider_input(self, response, spider): + return 1.0 # , not None + + +class InvalidReturnValueFromPreviousMiddlewareOutputSpider(Spider): + start_urls = ["http://example.com/"] + name = 'invalid_return_value_from_previous_middleware_output' + custom_settings = { + 'SPIDER_MIDDLEWARES': { + # engine side + 'tests.test_spidermiddleware.CatchExceptionMiddleware': 540, + 'tests.test_spidermiddleware.InvalidReturnValueOutputMiddleware': 545, + # spider side + } + } + + def parse(self, response): + return None + + +class InvalidReturnValueOutputMiddleware(object): + def process_spider_output(self, response, result, spider): + return 1 # , not an iterable + + +# ================================================================================ +# make sure only non already called process_spider_output methods +# are called if process_spider_exception returns an iterable +class ExecutionChainSpider(Spider): + start_urls = ["http://example.com"] + name = 'execution_chain' + custom_settings = { + 'SPIDER_MIDDLEWARES': { + # engine side + 'tests.test_spidermiddleware.ThirdMiddleware': 540, + 'tests.test_spidermiddleware.SecondMiddleware': 541, + 'tests.test_spidermiddleware.FirstMiddleware': 542 + # spider side + }, + } + + def parse(self, response): + return None + + +class FirstMiddleware(object): + def process_spider_output(self, response, result, spider): + for r in result: + if isinstance(r, dict): + r['handled_by_first_middleware'] = True + yield r + + def process_spider_exception(self, response, exception, spider): + # log exception, handle control to the next middleware's process_spider_exception + logging.warn('{} exception caught'.format(exception.__class__.__name__)) + return None + + +class SecondMiddleware(object): + def process_spider_output(self, response, result, spider): + for r in result: + if isinstance(r, dict): + r['handled_by_second_middleware'] = True + yield r + raise MemoryError + + +class ThirdMiddleware(object): + def process_spider_output(self, response, result, spider): + for r in result: + if isinstance(r, dict): + r['handled_by_third_middleware'] = True + yield r + + def process_spider_exception(self, response, exception, spider): + # handle control to the next middleware's process_spider_output + return [{'item': i} for i in range(3)] + + +class TestSpiderMiddleware(TestCase): + + @defer.inlineCallbacks + def test_process_spider_exception_from_parse_method(self): + # non-generator return value + crawler = get_crawler(NotAGeneratorSpider) + with LogCapture() as log: + yield crawler.crawl() + self.assertIn("AssertionError exception caught", str(log)) + self.assertIn("spider_exceptions/AssertionError", str(log)) + # generator return value, no items before the error + crawler = get_crawler(GeneratorErrorBeforeItemsSpider) + with LogCapture() as log: + yield crawler.crawl() + self.assertIn("ValueError exception caught", str(log)) + self.assertIn("spider_exceptions/ValueError", str(log)) + # generator return value, 3 items before the error + crawler = get_crawler(GeneratorErrorAfterItemsSpider) + with LogCapture() as log: + yield crawler.crawl() + self.assertIn("'item_scraped_count': 3", str(log)) + self.assertIn("FloatingPointError exception caught", str(log)) + self.assertIn("spider_exceptions/FloatingPointError", str(log)) + + @defer.inlineCallbacks + def test_process_spider_exception_from_previous_middleware_input(self): + crawler = get_crawler(FromPreviousMiddlewareInputSpider) + with LogCapture() as log: + yield crawler.crawl() + self.assertIn("LookupError exception caught", str(log)) + + @defer.inlineCallbacks + def test_process_spider_exception_from_previous_middleware_output(self): + # non-generator output value + crawler = get_crawler(NotAGeneratorFromPreviousMiddlewareOutputSpider) + with LogCapture() as log: + yield crawler.crawl() + self.assertNotIn("UnicodeError exception caught", str(log)) + # generator output value + crawler = get_crawler(GeneratorFromPreviousMiddlewareOutputSpider) + with LogCapture() as log: + yield crawler.crawl() + self.assertIn("'item_scraped_count': 3", str(log)) + self.assertIn("NameError exception caught", str(log)) + + @defer.inlineCallbacks + def test_process_spider_exception_do_something(self): + crawler = get_crawler(DoSomethingSpider) + with LogCapture() as log: + yield crawler.crawl() + self.assertIn("ImportError exception caught", str(log)) + self.assertIn("{'value': 10}", str(log)) + self.assertIn("{'value': 'asdf'}", str(log)) + self.assertIn("{'value': 'http://example.com'}", str(log)) + self.assertIn("{'value': 'http://example.org'}", str(log)) + + @defer.inlineCallbacks + def test_process_spider_exception_invalid_return_value_previous_middleware(self): + """ don't catch InvalidOutput from middleware """ + # on middleware's input + crawler1 = get_crawler(InvalidReturnValueFromPreviousMiddlewareInputSpider) + with LogCapture() as log1: + yield crawler1.crawl() + self.assertNotIn("InvalidOutput exception caught", str(log1)) + self.assertIn("'spider_exceptions/InvalidOutput'", str(log1)) + # on middleware's output + crawler2 = get_crawler(InvalidReturnValueFromPreviousMiddlewareOutputSpider) + with LogCapture() as log2: + yield crawler2.crawl() + self.assertNotIn("InvalidOutput exception caught", str(log2)) + self.assertIn("'spider_exceptions/InvalidOutput'", str(log2)) + + @defer.inlineCallbacks + def test_process_spider_exception_execution_chain(self): + # on middleware's input + crawler1 = get_crawler(ExecutionChainSpider) + with LogCapture() as log1: + yield crawler1.crawl() + self.assertNotIn("handled_by_first_middleware", str(log1)) + self.assertNotIn("handled_by_second_middleware", str(log1)) + self.assertIn("MemoryError exception caught", str(log1)) + self.assertIn("handled_by_third_middleware", str(log1)) From 4090cc3990636337964a6e157679d6be15ba6f3a Mon Sep 17 00:00:00 2001 From: Eugenio Lacuesta Date: Wed, 8 Mar 2017 18:11:20 -0300 Subject: [PATCH 002/889] Spider middleware: use Mockserver to test process_spider_exception --- tests/test_spidermiddleware.py | 42 +++++++++++++++++++--------------- 1 file changed, 23 insertions(+), 19 deletions(-) diff --git a/tests/test_spidermiddleware.py b/tests/test_spidermiddleware.py index 8ec9583d8..3981a8d75 100644 --- a/tests/test_spidermiddleware.py +++ b/tests/test_spidermiddleware.py @@ -9,16 +9,20 @@ from scrapy.spiders import Spider from scrapy.item import Item, Field from scrapy.http import Request from scrapy.utils.test import get_crawler +from tests.mockserver import MockServer class TestItem(Item): value = Field() +class LocalhostSpider(Spider): + start_urls = ['http://localhost:8998'] # tests.mockserver.MockServer + + # ================================================================================ # exceptions from a spider's parse method -class BaseExceptionFromParseMethodSpider(Spider): - start_urls = ["http://example.com/"] +class BaseExceptionFromParseMethodSpider(LocalhostSpider): custom_settings = { 'SPIDER_MIDDLEWARES': {'tests.test_spidermiddleware.CatchExceptionMiddleware': 540} } @@ -65,8 +69,7 @@ class CatchExceptionMiddleware(object): # exception from a previous middleware's process_spider_input method # process_spider_input is not expected to return an iterable, so there are no # separate tests for generator/non-generator implementations -class FromPreviousMiddlewareInputSpider(Spider): - start_urls = ["http://example.com/"] +class FromPreviousMiddlewareInputSpider(LocalhostSpider): name = 'not_a_generator_from_previous_middleware_input' custom_settings = { 'SPIDER_MIDDLEWARES': { @@ -88,8 +91,7 @@ class RaiseExceptionOnInputMiddleware(object): # ================================================================================ # exception from a previous middleware's process_spider_output method (not a generator) -class NotAGeneratorFromPreviousMiddlewareOutputSpider(Spider): - start_urls = ["http://example.com/"] +class NotAGeneratorFromPreviousMiddlewareOutputSpider(LocalhostSpider): name = 'not_a_generator_from_previous_middleware_output' custom_settings = { 'SPIDER_MIDDLEWARES': { @@ -111,8 +113,7 @@ class RaiseExceptionOnOutputNotAGeneratorMiddleware(object): # ================================================================================ # exception from a previous middleware's process_spider_output method (generator) -class GeneratorFromPreviousMiddlewareOutputSpider(Spider): - start_urls = ["http://example.com/"] +class GeneratorFromPreviousMiddlewareOutputSpider(LocalhostSpider): name = 'generator_from_previous_middleware_output' custom_settings = { 'SPIDER_MIDDLEWARES': { @@ -136,8 +137,7 @@ class RaiseExceptionOnOutputGeneratorMiddleware(object): # ================================================================================ # do something useful from the exception handler -class DoSomethingSpider(Spider): - start_urls = ["http://example.com"] +class DoSomethingSpider(LocalhostSpider): name = 'do_something' custom_settings = { 'SPIDER_MIDDLEWARES': { @@ -155,13 +155,12 @@ class DoSomethingSpider(Spider): class DoSomethingMiddleware(object): def process_spider_exception(self, response, exception, spider): - return [Request('http://example.org'), {'value': 10}, TestItem(value='asdf')] + return [Request('http://localhost:8998?processed=true'), {'value': 10}, TestItem(value='asdf')] # ================================================================================ # don't catch InvalidOutput from scrapy's spider middleware manager -class InvalidReturnValueFromPreviousMiddlewareInputSpider(Spider): - start_urls = ["http://example.com/"] +class InvalidReturnValueFromPreviousMiddlewareInputSpider(LocalhostSpider): name = 'invalid_return_value_from_previous_middleware_input' custom_settings = { 'SPIDER_MIDDLEWARES': { @@ -181,8 +180,7 @@ class InvalidReturnValueInputMiddleware(object): return 1.0 # , not None -class InvalidReturnValueFromPreviousMiddlewareOutputSpider(Spider): - start_urls = ["http://example.com/"] +class InvalidReturnValueFromPreviousMiddlewareOutputSpider(LocalhostSpider): name = 'invalid_return_value_from_previous_middleware_output' custom_settings = { 'SPIDER_MIDDLEWARES': { @@ -205,8 +203,7 @@ class InvalidReturnValueOutputMiddleware(object): # ================================================================================ # make sure only non already called process_spider_output methods # are called if process_spider_exception returns an iterable -class ExecutionChainSpider(Spider): - start_urls = ["http://example.com"] +class ExecutionChainSpider(LocalhostSpider): name = 'execution_chain' custom_settings = { 'SPIDER_MIDDLEWARES': { @@ -258,6 +255,13 @@ class ThirdMiddleware(object): class TestSpiderMiddleware(TestCase): + def setUp(self): + self.mockserver = MockServer() + self.mockserver.__enter__() + + def tearDown(self): + self.mockserver.__exit__(None, None, None) + @defer.inlineCallbacks def test_process_spider_exception_from_parse_method(self): # non-generator return value @@ -309,8 +313,8 @@ class TestSpiderMiddleware(TestCase): self.assertIn("ImportError exception caught", str(log)) self.assertIn("{'value': 10}", str(log)) self.assertIn("{'value': 'asdf'}", str(log)) - self.assertIn("{'value': 'http://example.com'}", str(log)) - self.assertIn("{'value': 'http://example.org'}", str(log)) + self.assertIn("{'value': 'http://localhost:8998'}", str(log)) + self.assertIn("{'value': 'http://localhost:8998?processed=true'}", str(log)) @defer.inlineCallbacks def test_process_spider_exception_invalid_return_value_previous_middleware(self): From 9c256cf693d73e854d409d717854b3f354b5e0a9 Mon Sep 17 00:00:00 2001 From: Eugenio Lacuesta Date: Fri, 10 Mar 2017 15:41:57 -0300 Subject: [PATCH 003/889] Undocument _InvalidOutput exception --- docs/topics/exceptions.rst | 11 ----------- scrapy/core/spidermw.py | 12 ++++++------ scrapy/exceptions.py | 8 +++++--- tests/test_spidermiddleware.py | 12 ++++++------ 4 files changed, 17 insertions(+), 26 deletions(-) diff --git a/docs/topics/exceptions.rst b/docs/topics/exceptions.rst index a3ff72827..cc02369d4 100644 --- a/docs/topics/exceptions.rst +++ b/docs/topics/exceptions.rst @@ -62,17 +62,6 @@ remain disabled. Those components include: The exception must be raised in the component's ``__init__`` method. -InvalidOutput -------------- - -.. exception:: InvalidOutput - -This exception can be raised by a downloader or spider middleware to -indicate that some method returned a value not suported by the processing -chain. -See :ref:`topics-spider-middleware` and :ref:`topics-downloader-middleware` -for a list of supported output values. - NotSupported ------------ diff --git a/scrapy/core/spidermw.py b/scrapy/core/spidermw.py index 0f03a7b36..50677670b 100644 --- a/scrapy/core/spidermw.py +++ b/scrapy/core/spidermw.py @@ -5,7 +5,7 @@ See documentation in docs/topics/spider-middleware.rst """ import six from twisted.python.failure import Failure -from scrapy.exceptions import InvalidOutput +from scrapy.exceptions import _InvalidOutput from scrapy.middleware import MiddlewareManager from scrapy.utils.defer import mustbe_deferred from scrapy.utils.conf import build_component_list @@ -42,7 +42,7 @@ class SpiderMiddlewareManager(MiddlewareManager): try: result = method(response=response, spider=spider) if result is not None: - raise InvalidOutput('Middleware {} must return None or raise ' \ + raise _InvalidOutput('Middleware {} must return None or raise ' \ 'an exception, got {}'.format(fname(method), type(result))) except: return scrape_func(Failure(), request, spider) @@ -50,13 +50,13 @@ class SpiderMiddlewareManager(MiddlewareManager): def process_spider_exception(_failure): exception = _failure.value - # don't handle InvalidOutput exception - if isinstance(exception, InvalidOutput): + # don't handle _InvalidOutput exception + if isinstance(exception, _InvalidOutput): return _failure for method in self.methods['process_spider_exception']: result = method(response=response, exception=exception, spider=spider) if result is not None and not _isiterable(result): - raise InvalidOutput('Middleware {} must return None or an iterable ' \ + raise _InvalidOutput('Middleware {} must return None or an iterable ' \ 'object, got {}'.format(fname(method), type(result))) # stop exception handling by handing control over to the # process_spider_output chain if an iterable has been returned @@ -80,7 +80,7 @@ class SpiderMiddlewareManager(MiddlewareManager): if _isiterable(result): result = wrapper(result) else: - raise InvalidOutput('Middleware {} must return an iterable object, ' \ + raise _InvalidOutput('Middleware {} must return an iterable object, ' \ 'got {}'.format(fname(method), type(result))) return result diff --git a/scrapy/exceptions.py b/scrapy/exceptions.py index ba7272255..96949bdd9 100644 --- a/scrapy/exceptions.py +++ b/scrapy/exceptions.py @@ -11,9 +11,11 @@ class NotConfigured(Exception): """Indicates a missing configuration situation""" pass -class InvalidOutput(TypeError): - """Indicates an invalid value has been returned - by a middleware's processing method""" +class _InvalidOutput(TypeError): + """ + Indicates an invalid value has been returned by a middleware's processing method. + Internal and undocumented, it should not be raised or caught by user code. + """ pass # HTTP and crawling diff --git a/tests/test_spidermiddleware.py b/tests/test_spidermiddleware.py index 3981a8d75..2d05c335c 100644 --- a/tests/test_spidermiddleware.py +++ b/tests/test_spidermiddleware.py @@ -159,7 +159,7 @@ class DoSomethingMiddleware(object): # ================================================================================ -# don't catch InvalidOutput from scrapy's spider middleware manager +# don't catch _InvalidOutput from scrapy's spider middleware manager class InvalidReturnValueFromPreviousMiddlewareInputSpider(LocalhostSpider): name = 'invalid_return_value_from_previous_middleware_input' custom_settings = { @@ -318,19 +318,19 @@ class TestSpiderMiddleware(TestCase): @defer.inlineCallbacks def test_process_spider_exception_invalid_return_value_previous_middleware(self): - """ don't catch InvalidOutput from middleware """ + """ don't catch _InvalidOutput from middleware """ # on middleware's input crawler1 = get_crawler(InvalidReturnValueFromPreviousMiddlewareInputSpider) with LogCapture() as log1: yield crawler1.crawl() - self.assertNotIn("InvalidOutput exception caught", str(log1)) - self.assertIn("'spider_exceptions/InvalidOutput'", str(log1)) + self.assertNotIn("_InvalidOutput exception caught", str(log1)) + self.assertIn("'spider_exceptions/_InvalidOutput'", str(log1)) # on middleware's output crawler2 = get_crawler(InvalidReturnValueFromPreviousMiddlewareOutputSpider) with LogCapture() as log2: yield crawler2.crawl() - self.assertNotIn("InvalidOutput exception caught", str(log2)) - self.assertIn("'spider_exceptions/InvalidOutput'", str(log2)) + self.assertNotIn("_InvalidOutput exception caught", str(log2)) + self.assertIn("'spider_exceptions/_InvalidOutput'", str(log2)) @defer.inlineCallbacks def test_process_spider_exception_execution_chain(self): From 4cfbe8204480214b65d48caaf080feda30fe91ae Mon Sep 17 00:00:00 2001 From: Eugenio Lacuesta Date: Fri, 10 Mar 2017 15:47:47 -0300 Subject: [PATCH 004/889] Downloader middleware: raise _InvalidOutput Instead of AssertionError, to make it consistent with spider middleware --- scrapy/core/downloader/middleware.py | 19 ++++++++++--------- 1 file changed, 10 insertions(+), 9 deletions(-) diff --git a/scrapy/core/downloader/middleware.py b/scrapy/core/downloader/middleware.py index c3b23e284..cf0c1f869 100644 --- a/scrapy/core/downloader/middleware.py +++ b/scrapy/core/downloader/middleware.py @@ -7,6 +7,7 @@ import six from twisted.internet import defer +from scrapy.exceptions import _InvalidOutput from scrapy.http import Request, Response from scrapy.middleware import MiddlewareManager from scrapy.utils.defer import mustbe_deferred @@ -35,9 +36,9 @@ class DownloaderMiddlewareManager(MiddlewareManager): def process_request(request): for method in self.methods['process_request']: response = yield method(request=request, spider=spider) - assert response is None or isinstance(response, (Response, Request)), \ - 'Middleware %s.process_request must return None, Response or Request, got %s' % \ - (six.get_method_self(method).__class__.__name__, response.__class__.__name__) + if response is not None and not isinstance(response, (Response, Request)): + raise _InvalidOutput('Middleware %s.process_request must return None, Response or Request, got %s' % \ + (six.get_method_self(method).__class__.__name__, response.__class__.__name__)) if response: defer.returnValue(response) defer.returnValue((yield download_func(request=request,spider=spider))) @@ -51,9 +52,9 @@ class DownloaderMiddlewareManager(MiddlewareManager): for method in self.methods['process_response']: response = yield method(request=request, response=response, spider=spider) - assert isinstance(response, (Response, Request)), \ - 'Middleware %s.process_response must return Response or Request, got %s' % \ - (six.get_method_self(method).__class__.__name__, type(response)) + if not isinstance(response, (Response, Request)): + raise _InvalidOutput('Middleware %s.process_response must return Response or Request, got %s' % \ + (six.get_method_self(method).__class__.__name__, type(response))) if isinstance(response, Request): defer.returnValue(response) defer.returnValue(response) @@ -64,9 +65,9 @@ class DownloaderMiddlewareManager(MiddlewareManager): for method in self.methods['process_exception']: response = yield method(request=request, exception=exception, spider=spider) - assert response is None or isinstance(response, (Response, Request)), \ - 'Middleware %s.process_exception must return None, Response or Request, got %s' % \ - (six.get_method_self(method).__class__.__name__, type(response)) + if response is not None and not isinstance(response, (Response, Request)): + raise _InvalidOutput('Middleware %s.process_exception must return None, Response or Request, got %s' % \ + (six.get_method_self(method).__class__.__name__, type(response))) if response: defer.returnValue(response) defer.returnValue(_failure) From b040df5ac09cf133cd07b505d20469a56409129c Mon Sep 17 00:00:00 2001 From: Mikhail Korobov Date: Tue, 21 Mar 2017 15:56:18 +0500 Subject: [PATCH 005/889] TST cleanup spider middleware tests --- tests/test_spidermiddleware.py | 73 ++++++++++++++++------------------ 1 file changed, 34 insertions(+), 39 deletions(-) diff --git a/tests/test_spidermiddleware.py b/tests/test_spidermiddleware.py index 2d05c335c..109bcc250 100644 --- a/tests/test_spidermiddleware.py +++ b/tests/test_spidermiddleware.py @@ -255,61 +255,62 @@ class ThirdMiddleware(object): class TestSpiderMiddleware(TestCase): - def setUp(self): - self.mockserver = MockServer() - self.mockserver.__enter__() + @classmethod + def setUpClass(cls): + cls.mockserver = MockServer() + cls.mockserver.__enter__() - def tearDown(self): - self.mockserver.__exit__(None, None, None) + @classmethod + def tearDownClass(cls): + cls.mockserver.__exit__(None, None, None) @defer.inlineCallbacks - def test_process_spider_exception_from_parse_method(self): - # non-generator return value - crawler = get_crawler(NotAGeneratorSpider) + def crawl_log(self, spider): + crawler = get_crawler(spider) with LogCapture() as log: yield crawler.crawl() + raise defer.returnValue(log) + + @defer.inlineCallbacks + def test_process_spider_exception_from_parse_method_non_generator(self): + # non-generator return value + log = yield self.crawl_log(NotAGeneratorSpider) self.assertIn("AssertionError exception caught", str(log)) self.assertIn("spider_exceptions/AssertionError", str(log)) + + @defer.inlineCallbacks + def test_process_spider_exception_from_parse_method_generator_no_items(self): # generator return value, no items before the error - crawler = get_crawler(GeneratorErrorBeforeItemsSpider) - with LogCapture() as log: - yield crawler.crawl() + log = yield self.crawl_log(GeneratorErrorBeforeItemsSpider) self.assertIn("ValueError exception caught", str(log)) self.assertIn("spider_exceptions/ValueError", str(log)) + + @defer.inlineCallbacks + def test_process_spider_exception_from_parse_method_generator_with_items(self): # generator return value, 3 items before the error - crawler = get_crawler(GeneratorErrorAfterItemsSpider) - with LogCapture() as log: - yield crawler.crawl() + log = yield self.crawl_log(GeneratorErrorAfterItemsSpider) self.assertIn("'item_scraped_count': 3", str(log)) self.assertIn("FloatingPointError exception caught", str(log)) self.assertIn("spider_exceptions/FloatingPointError", str(log)) @defer.inlineCallbacks def test_process_spider_exception_from_previous_middleware_input(self): - crawler = get_crawler(FromPreviousMiddlewareInputSpider) - with LogCapture() as log: - yield crawler.crawl() + log = yield self.crawl_log(FromPreviousMiddlewareInputSpider) self.assertIn("LookupError exception caught", str(log)) @defer.inlineCallbacks def test_process_spider_exception_from_previous_middleware_output(self): # non-generator output value - crawler = get_crawler(NotAGeneratorFromPreviousMiddlewareOutputSpider) - with LogCapture() as log: - yield crawler.crawl() + log = yield self.crawl_log(NotAGeneratorFromPreviousMiddlewareOutputSpider) self.assertNotIn("UnicodeError exception caught", str(log)) # generator output value - crawler = get_crawler(GeneratorFromPreviousMiddlewareOutputSpider) - with LogCapture() as log: - yield crawler.crawl() + log = yield self.crawl_log(GeneratorFromPreviousMiddlewareOutputSpider) self.assertIn("'item_scraped_count': 3", str(log)) self.assertIn("NameError exception caught", str(log)) @defer.inlineCallbacks def test_process_spider_exception_do_something(self): - crawler = get_crawler(DoSomethingSpider) - with LogCapture() as log: - yield crawler.crawl() + log = yield self.crawl_log(DoSomethingSpider) self.assertIn("ImportError exception caught", str(log)) self.assertIn("{'value': 10}", str(log)) self.assertIn("{'value': 'asdf'}", str(log)) @@ -320,25 +321,19 @@ class TestSpiderMiddleware(TestCase): def test_process_spider_exception_invalid_return_value_previous_middleware(self): """ don't catch _InvalidOutput from middleware """ # on middleware's input - crawler1 = get_crawler(InvalidReturnValueFromPreviousMiddlewareInputSpider) - with LogCapture() as log1: - yield crawler1.crawl() + log1 = yield self.crawl_log(InvalidReturnValueFromPreviousMiddlewareInputSpider) self.assertNotIn("_InvalidOutput exception caught", str(log1)) self.assertIn("'spider_exceptions/_InvalidOutput'", str(log1)) # on middleware's output - crawler2 = get_crawler(InvalidReturnValueFromPreviousMiddlewareOutputSpider) - with LogCapture() as log2: - yield crawler2.crawl() + log2 = yield self.crawl_log(InvalidReturnValueFromPreviousMiddlewareOutputSpider) self.assertNotIn("_InvalidOutput exception caught", str(log2)) self.assertIn("'spider_exceptions/_InvalidOutput'", str(log2)) @defer.inlineCallbacks def test_process_spider_exception_execution_chain(self): # on middleware's input - crawler1 = get_crawler(ExecutionChainSpider) - with LogCapture() as log1: - yield crawler1.crawl() - self.assertNotIn("handled_by_first_middleware", str(log1)) - self.assertNotIn("handled_by_second_middleware", str(log1)) - self.assertIn("MemoryError exception caught", str(log1)) - self.assertIn("handled_by_third_middleware", str(log1)) + log = yield self.crawl_log(ExecutionChainSpider) + self.assertNotIn("handled_by_first_middleware", str(log)) + self.assertNotIn("handled_by_second_middleware", str(log)) + self.assertIn("MemoryError exception caught", str(log)) + self.assertIn("handled_by_third_middleware", str(log)) From 815d6160cfac5c0b764d01fc9d4ebc4ab7793aac Mon Sep 17 00:00:00 2001 From: Jakob de Maeyer Date: Mon, 16 Nov 2015 18:28:49 +0100 Subject: [PATCH 006/889] Add from_crawler constructor for feed exporters and storages --- scrapy/extensions/feedexport.py | 12 +++++-- scrapy/middleware.py | 9 ++--- scrapy/utils/misc.py | 24 +++++++++++++ tests/test_feedexport.py | 30 ++++++++++++++++ tests/test_utils_misc/__init__.py | 58 ++++++++++++++++++++++++++++++- 5 files changed, 122 insertions(+), 11 deletions(-) diff --git a/scrapy/extensions/feedexport.py b/scrapy/extensions/feedexport.py index 5f133fbde..70c302fba 100644 --- a/scrapy/extensions/feedexport.py +++ b/scrapy/extensions/feedexport.py @@ -21,7 +21,7 @@ from w3lib.url import file_uri_to_path from scrapy import signals from scrapy.utils.ftp import ftp_makedirs_cwd from scrapy.exceptions import NotConfigured -from scrapy.utils.misc import load_object +from scrapy.utils.misc import create_instance, load_object from scrapy.utils.log import failure_to_exc_info from scrapy.utils.python import without_none_values from scrapy.utils.boto import is_botocore @@ -181,6 +181,7 @@ class FeedExporter(object): @classmethod def from_crawler(cls, crawler): o = cls(crawler.settings) + o.crawler = crawler crawler.signals.connect(o.open_spider, signals.spider_opened) crawler.signals.connect(o.close_spider, signals.spider_closed) crawler.signals.connect(o.item_scraped, signals.item_scraped) @@ -253,11 +254,16 @@ class FeedExporter(object): logger.error("Unknown feed storage scheme: %(scheme)s", {'scheme': scheme}) + def _get_instance(self, objcls, *args, **kwargs): + return create_instance( + objcls, self.settings, getattr(self, 'crawler', None), + *args, **kwargs) + def _get_exporter(self, *args, **kwargs): - return self.exporters[self.format](*args, **kwargs) + return self._get_instance(self.exporters[self.format], *args, **kwargs) def _get_storage(self, uri): - return self.storages[urlparse(uri).scheme](uri) + return self._get_instance(self.storages[urlparse(uri).scheme], uri) def _get_uri_params(self, spider): params = {} diff --git a/scrapy/middleware.py b/scrapy/middleware.py index be36f977e..f2240984c 100644 --- a/scrapy/middleware.py +++ b/scrapy/middleware.py @@ -3,7 +3,7 @@ import logging import pprint from scrapy.exceptions import NotConfigured -from scrapy.utils.misc import load_object +from scrapy.utils.misc import create_instance, load_object from scrapy.utils.defer import process_parallel, process_chain, process_chain_both logger = logging.getLogger(__name__) @@ -32,12 +32,7 @@ class MiddlewareManager(object): for clspath in mwlist: try: mwcls = load_object(clspath) - if crawler and hasattr(mwcls, 'from_crawler'): - mw = mwcls.from_crawler(crawler) - elif hasattr(mwcls, 'from_settings'): - mw = mwcls.from_settings(settings) - else: - mw = mwcls() + mw = create_instance(mwcls, settings, crawler) middlewares.append(mw) enabled.append(clspath) except NotConfigured as e: diff --git a/scrapy/utils/misc.py b/scrapy/utils/misc.py index 35f855007..8eb1aabb5 100644 --- a/scrapy/utils/misc.py +++ b/scrapy/utils/misc.py @@ -117,3 +117,27 @@ def md5sum(file): def rel_has_nofollow(rel): """Return True if link rel attribute has nofollow type""" return True if rel is not None and 'nofollow' in rel.split() else False + +def create_instance(objcls, settings, crawler, *args, **kwargs): + """Construct a class instance using its ``from_crawler`` or + ``from_settings`` constructors, if available. + + At least one of ``settings`` and ``crawler`` needs to be different from + ``None``. If ``settings `` is ``None``, ``crawler.settings`` will be used. + If ``crawler`` is ``None``, only the ``from_settings`` constructor will be + tried. + + ``*args`` and ``**kwargs`` are forwarded to the constructors. + + Raises ``ValueError`` if both ``settings`` and ``crawler`` are ``None``. + """ + if settings is None: + if crawler is None: + raise ValueError("Specifiy at least one of settings and crawler.") + settings = crawler.settings + if crawler and hasattr(objcls, 'from_crawler'): + return objcls.from_crawler(crawler, *args, **kwargs) + elif hasattr(objcls, 'from_settings'): + return objcls.from_settings(settings, *args, **kwargs) + else: + return objcls(*args, **kwargs) diff --git a/tests/test_feedexport.py b/tests/test_feedexport.py index f55927121..08f7e4d8d 100644 --- a/tests/test_feedexport.py +++ b/tests/test_feedexport.py @@ -16,6 +16,7 @@ from tests.mockserver import MockServer from w3lib.url import path_to_file_uri import scrapy +from scrapy.exporters import CsvItemExporter from scrapy.extensions.feedexport import ( IFeedStorage, FileFeedStorage, FTPFeedStorage, S3FeedStorage, StdoutFeedStorage, @@ -159,6 +160,23 @@ class StdoutFeedStorageTest(unittest.TestCase): self.assertEqual(out.getvalue(), b"content") +class FromCrawlerMixin(object): + init_with_crawler = False + + @classmethod + def from_crawler(cls, crawler, *args, **kwargs): + cls.init_with_crawler = True + return cls(*args, **kwargs) + + +class FromCrawlerCsvItemExporter(CsvItemExporter, FromCrawlerMixin): + pass + + +class FromCrawlerFileFeedStorage(FileFeedStorage, FromCrawlerMixin): + pass + + class FeedExportTest(unittest.TestCase): class MyItem(scrapy.Item): @@ -599,3 +617,15 @@ class FeedExportTest(unittest.TestCase): data = yield self.exported_data(items, settings) print(row['format'], row['indent']) self.assertEqual(row['expected'], data) + + @defer.inlineCallbacks + def test_init_exporters_storages_with_crawler(self): + settings = { + 'FEED_EXPORTERS': {'csv': 'tests.test_feedexport.' + 'FromCrawlerCsvItemExporter'}, + 'FEED_STORAGES': {'file': 'tests.test_feedexport.' + 'FromCrawlerFileFeedStorage'}, + } + yield self.exported_data({}, settings) + self.assertTrue(FromCrawlerCsvItemExporter.init_with_crawler) + self.assertTrue(FromCrawlerFileFeedStorage.init_with_crawler) diff --git a/tests/test_utils_misc/__init__.py b/tests/test_utils_misc/__init__.py index 01460a10b..b95bba5c1 100644 --- a/tests/test_utils_misc/__init__.py +++ b/tests/test_utils_misc/__init__.py @@ -3,7 +3,9 @@ import os import unittest from scrapy.item import Item, Field -from scrapy.utils.misc import load_object, arg_to_iter, walk_modules +from scrapy.utils.misc import arg_to_iter, create_instance, load_object, walk_modules + +from tests import mock __doctests__ = ['scrapy.utils.misc'] @@ -74,5 +76,59 @@ class UtilsMiscTestCase(unittest.TestCase): self.assertEqual(list(arg_to_iter({'a':1})), [{'a': 1}]) self.assertEqual(list(arg_to_iter(TestItem(name="john"))), [TestItem(name="john")]) + def test_create_instance(self): + settings = mock.MagicMock() + crawler = mock.MagicMock(spec_set=['settings']) + args = (True, 100.) + kwargs = {'key': 'val'} + + def _test_with_settings(mock, settings): + create_instance(mock, settings, None, *args, **kwargs) + if hasattr(mock, 'from_crawler'): + self.assertEqual(mock.from_crawler.call_count, 0) + if hasattr(mock, 'from_settings'): + mock.from_settings.assert_called_once_with(settings, *args, + **kwargs) + self.assertEqual(mock.call_count, 0) + else: + mock.assert_called_once_with(*args, **kwargs) + + def _test_with_crawler(mock, settings, crawler): + create_instance(mock, settings, crawler, *args, **kwargs) + if hasattr(mock, 'from_crawler'): + mock.from_crawler.assert_called_once_with(crawler, *args, + **kwargs) + if hasattr(mock, 'from_settings'): + self.assertEqual(mock.from_settings.call_count, 0) + self.assertEqual(mock.call_count, 0) + elif hasattr(mock, 'from_settings'): + mock.from_settings.assert_called_once_with(settings, *args, + **kwargs) + self.assertEqual(mock.call_count, 0) + else: + mock.assert_called_once_with(*args, **kwargs) + + # Check usage of correct constructor using four mocks: + # 1. with no alternative constructors + # 2. with from_settings() constructor + # 3. with from_crawler() constructor + # 4. with from_settings() and from_crawler() constructor + spec_sets = ([], ['from_settings'], ['from_crawler'], + ['from_settings', 'from_crawler']) + for specs in spec_sets: + m = mock.MagicMock(spec_set=specs) + _test_with_settings(m, settings) + m.reset_mock() + _test_with_crawler(m, settings, crawler) + + # Check adoption of crawler settings + m = mock.MagicMock(spec_set=['from_settings']) + create_instance(m, None, crawler, *args, **kwargs) + m.from_settings.assert_called_once_with(crawler.settings, *args, + **kwargs) + + with self.assertRaises(ValueError): + create_instance(m, None, None) + if __name__ == "__main__": unittest.main() From 4d77c3084e64d351e3acf9092b4171d4418925fe Mon Sep 17 00:00:00 2001 From: Jakob de Maeyer Date: Mon, 23 Nov 2015 12:24:05 +0100 Subject: [PATCH 007/889] Add from_crawler constructor to S3FeedStorage --- scrapy/extensions/feedexport.py | 27 ++++++++++++++++++++--- tests/test_feedexport.py | 38 ++++++++++++++++++++++++++++++++- 2 files changed, 61 insertions(+), 4 deletions(-) diff --git a/scrapy/extensions/feedexport.py b/scrapy/extensions/feedexport.py index 70c302fba..067887d94 100644 --- a/scrapy/extensions/feedexport.py +++ b/scrapy/extensions/feedexport.py @@ -93,12 +93,28 @@ class FileFeedStorage(object): class S3FeedStorage(BlockingFeedStorage): - def __init__(self, uri): + def __init__(self, uri, access_key=None, secret_key=None): + # BEGIN Backwards compatibility for initialising without keys (and + # without using from_crawler) from scrapy.conf import settings + no_defaults = access_key is None and secret_key is None + if no_defaults and ('AWS_ACCESS_KEY_ID' in settings or + 'AWS_SECRET_ACCESS_KEY' in settings): + import warnings + from scrapy.exceptions import ScrapyDeprecationWarning + warnings.warn( + "Initialising `scrapy.extensions.feedexport.S3FeedStorage` " + "without AWS keys is deprecated. Please supply credentials or " + "use the `from_crawler()` constructor.", + category=ScrapyDeprecationWarning, + stacklevel=2 + ) + access_key = settings['AWS_ACCESS_KEY_ID'] + secret_key = settings['AWS_SECRET_ACCESS_KEY'] u = urlparse(uri) self.bucketname = u.hostname - self.access_key = u.username or settings['AWS_ACCESS_KEY_ID'] - self.secret_key = u.password or settings['AWS_SECRET_ACCESS_KEY'] + self.access_key = u.username or access_key + self.secret_key = u.password or secret_key self.is_botocore = is_botocore() self.keyname = u.path[1:] # remove first "/" if self.is_botocore: @@ -111,6 +127,11 @@ class S3FeedStorage(BlockingFeedStorage): import boto self.connect_s3 = boto.connect_s3 + @classmethod + def from_crawler(cls, crawler, uri): + return cls(uri, crawler.settings['AWS_ACCESS_KEY_ID'], + crawler.settings['AWS_SECRET_ACCESS_KEY']) + def _store_in_thread(self, file): file.seek(0) if self.is_botocore: diff --git a/tests/test_feedexport.py b/tests/test_feedexport.py index 08f7e4d8d..eeb1bc2a4 100644 --- a/tests/test_feedexport.py +++ b/tests/test_feedexport.py @@ -6,12 +6,14 @@ from io import BytesIO import tempfile import shutil from six.moves.urllib.parse import urlparse +import warnings from zope.interface.verify import verifyObject from twisted.trial import unittest from twisted.internet import defer from scrapy.crawler import CrawlerRunner from scrapy.settings import Settings +from tests import mock from tests.mockserver import MockServer from w3lib.url import path_to_file_uri @@ -131,13 +133,47 @@ class BlockingFeedStorageTest(unittest.TestCase): class S3FeedStorageTest(unittest.TestCase): + @mock.patch('scrapy.conf.settings', new={'AWS_ACCESS_KEY_ID': 'conf_key', + 'AWS_SECRET_ACCESS_KEY': 'conf_secret'}, create=True) + def test_parse_credentials(self): + try: + import boto + except ImportError: + raise unittest.SkipTest("S3FeedStorage requires boto") + aws_credentials = {'AWS_ACCESS_KEY_ID': 'settings_key', + 'AWS_SECRET_ACCESS_KEY': 'settings_secret'} + crawler = get_crawler(settings_dict=aws_credentials) + # Instantiate with crawler + storage = S3FeedStorage.from_crawler(crawler, + 's3://mybucket/export.csv') + self.assertEqual(storage.access_key, 'settings_key') + self.assertEqual(storage.secret_key, 'settings_secret') + # Instantiate directly + storage = S3FeedStorage('s3://mybucket/export.csv', + aws_credentials['AWS_ACCESS_KEY_ID'], + aws_credentials['AWS_SECRET_ACCESS_KEY']) + self.assertEqual(storage.access_key, 'settings_key') + self.assertEqual(storage.secret_key, 'settings_secret') + # URI priority > settings priority + storage = S3FeedStorage('s3://uri_key:uri_secret@mybucket/export.csv', + aws_credentials['AWS_ACCESS_KEY_ID'], + aws_credentials['AWS_SECRET_ACCESS_KEY']) + self.assertEqual(storage.access_key, 'uri_key') + self.assertEqual(storage.secret_key, 'uri_secret') + # Backwards compatibility for initialising without settings + with warnings.catch_warnings(record=True) as w: + storage = S3FeedStorage('s3://mybucket/export.csv') + self.assertEqual(storage.access_key, 'conf_key') + self.assertEqual(storage.secret_key, 'conf_secret') + self.assertTrue('without AWS keys' in str(w[-1].message)) + @defer.inlineCallbacks def test_store(self): assert_aws_environ() uri = os.environ.get('S3_TEST_FILE_URI') if not uri: raise unittest.SkipTest("No S3 URI available for testing") - storage = S3FeedStorage(uri) + storage = S3FeedStorage(uri, Settings()) verifyObject(IFeedStorage, storage) file = storage.open(scrapy.Spider("default")) expected_content = b"content: \xe2\x98\x83" From aca2655c12d806759c6e0821a40d0277d200e0ea Mon Sep 17 00:00:00 2001 From: Patience Shyu Date: Fri, 2 Mar 2018 14:57:39 +0100 Subject: [PATCH 008/889] [WIP] Run tests for Python 3.7 --- .travis.yml | 2 ++ tox.ini | 4 ++++ 2 files changed, 6 insertions(+) diff --git a/.travis.yml b/.travis.yml index 6635f5d3b..e4df22139 100644 --- a/.travis.yml +++ b/.travis.yml @@ -23,6 +23,8 @@ matrix: env: TOXENV=py36 - python: 3.6 env: TOXENV=docs + - python: 3.7 + env: TOXENV=py37 install: - | if [ "$TOXENV" = "pypy" ]; then diff --git a/tox.ini b/tox.ini index 60ff8c15e..5301624ee 100644 --- a/tox.ini +++ b/tox.ini @@ -79,6 +79,10 @@ deps = {[testenv:py34]deps} basepython = python3.6 deps = {[testenv:py34]deps} +[testenv:py37] +basepython = python3.7 +deps = {[testenv:py34]deps} + [testenv:pypy3] basepython = pypy3 deps = {[testenv:py34]deps} From fab68ff6260b9ce4f55ca7b211a1aeb3e8e6df3d Mon Sep 17 00:00:00 2001 From: Patience Shyu Date: Fri, 2 Mar 2018 17:05:14 +0100 Subject: [PATCH 009/889] Use 3.7-dev version for travis --- .travis.yml | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/.travis.yml b/.travis.yml index e4df22139..aa1a3c4c3 100644 --- a/.travis.yml +++ b/.travis.yml @@ -23,7 +23,7 @@ matrix: env: TOXENV=py36 - python: 3.6 env: TOXENV=docs - - python: 3.7 + - python: 3.7-dev env: TOXENV=py37 install: - | From 4c05441450bc1f8438239af0310ab76777a2dacf Mon Sep 17 00:00:00 2001 From: nctl144 Date: Sat, 3 Mar 2018 00:00:03 -0500 Subject: [PATCH 010/889] add ftp to the scheme list --- scrapy/linkextractors/__init__.py | 3 ++- tests/test_linkextractors.py | 12 +++++++++++- 2 files changed, 13 insertions(+), 2 deletions(-) diff --git a/scrapy/linkextractors/__init__.py b/scrapy/linkextractors/__init__.py index 2d7115cc5..cda6ddc7e 100644 --- a/scrapy/linkextractors/__init__.py +++ b/scrapy/linkextractors/__init__.py @@ -41,7 +41,8 @@ IGNORED_EXTENSIONS = [ _re_type = type(re.compile("", 0)) _matches = lambda url, regexs: any(r.search(url) for r in regexs) -_is_valid_url = lambda url: url.split('://', 1)[0] in {'http', 'https', 'file'} +_is_valid_url = lambda url: url.split('://', 1)[0] in {'http', 'https', \ + 'file', 'ftp'} class FilteringLinkExtractor(object): diff --git a/tests/test_linkextractors.py b/tests/test_linkextractors.py index 1d7c4f311..903032b52 100644 --- a/tests/test_linkextractors.py +++ b/tests/test_linkextractors.py @@ -451,6 +451,17 @@ class Base: Link(url='http://example.org/item3.html', text=u'Item 3', nofollow=False), ]) + def test_ftp_links(self): + body = b""" + + + """ + response = HtmlResponse("http://www.example.com/index.html", body=body, encoding='utf8') + lx = self.extractor_cls() + self.assertEqual(lx.extract_links(response), [ + Link(url='ftp://www.external.com/', text=u'An Item', fragment='', nofollow=False), + ]) + class LxmlLinkExtractorTestCase(Base.LinkExtractorTestCase): extractor_cls = LxmlLinkExtractor @@ -471,4 +482,3 @@ class LxmlLinkExtractorTestCase(Base.LinkExtractorTestCase): @pytest.mark.xfail def test_restrict_xpaths_with_html_entities(self): super(LxmlLinkExtractorTestCase, self).test_restrict_xpaths_with_html_entities() - From ca7d79c29a55be4482bf2d4f704fc145ba801337 Mon Sep 17 00:00:00 2001 From: Patience Shyu Date: Mon, 5 Mar 2018 10:46:51 +0100 Subject: [PATCH 011/889] Install Twisted from branch to bypass syntax issue --- requirements.txt | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/requirements.txt b/requirements.txt index 2a94d742d..47eddf1fc 100644 --- a/requirements.txt +++ b/requirements.txt @@ -1,4 +1,4 @@ -Twisted>=13.1.0 +git+https://github.com/twisted/twisted.git@dcaf946 lxml pyOpenSSL cssselect>=0.9 From 5d1f5245f2699745e73449b013a29cc370f424c9 Mon Sep 17 00:00:00 2001 From: Patience Shyu Date: Mon, 5 Mar 2018 11:14:50 +0100 Subject: [PATCH 012/889] [WIP] Install Twisted from branch to bypass syntax issue --- requirements.txt | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/requirements.txt b/requirements.txt index 47eddf1fc..95cd37772 100644 --- a/requirements.txt +++ b/requirements.txt @@ -1,4 +1,4 @@ -git+https://github.com/twisted/twisted.git@dcaf946 +git+https://github.com/lopuhin/twisted.git@9384-remove-async-param lxml pyOpenSSL cssselect>=0.9 From f10a43d562dee32f324703fddb19bee5266912ce Mon Sep 17 00:00:00 2001 From: Patience Shyu Date: Mon, 5 Mar 2018 11:43:39 +0100 Subject: [PATCH 013/889] [WIP] Install Twisted from branch for py3.7 --- requirements-py3.txt | 2 +- requirements.txt | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/requirements-py3.txt b/requirements-py3.txt index 2aae3ae65..c3357e970 100644 --- a/requirements-py3.txt +++ b/requirements-py3.txt @@ -1,4 +1,4 @@ -Twisted >= 17.9.0 +git+https://github.com/lopuhin/twisted.git@9384-remove-async-param lxml>=3.2.4 pyOpenSSL>=0.13.1 cssselect>=0.9 diff --git a/requirements.txt b/requirements.txt index 95cd37772..2a94d742d 100644 --- a/requirements.txt +++ b/requirements.txt @@ -1,4 +1,4 @@ -git+https://github.com/lopuhin/twisted.git@9384-remove-async-param +Twisted>=13.1.0 lxml pyOpenSSL cssselect>=0.9 From cb76b88331e1e0cff30de9a6961de3e28e94ff44 Mon Sep 17 00:00:00 2001 From: grammy-jiang Date: Wed, 4 Apr 2018 05:56:05 -0400 Subject: [PATCH 014/889] fix a mistake in topic spider-middleware.rst --- docs/topics/spider-middleware.rst | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/docs/topics/spider-middleware.rst b/docs/topics/spider-middleware.rst index c297ed556..1d451af21 100644 --- a/docs/topics/spider-middleware.rst +++ b/docs/topics/spider-middleware.rst @@ -116,7 +116,7 @@ following methods: method (from other spider middleware) raises an exception. :meth:`process_spider_exception` should return either ``None`` or an - iterable of :class:`~scrapy.http.Response`, dict or + iterable of :class:`~scrapy.http.Request`, dict or :class:`~scrapy.item.Item` objects. If it returns ``None``, Scrapy will continue processing this exception, From e75f721c04446f8f28d3bdfcd69f967f65981407 Mon Sep 17 00:00:00 2001 From: Pengyu Chen Date: Mon, 23 Apr 2018 22:08:28 +0800 Subject: [PATCH 015/889] Added: Allowing optional arguments for `scrapy.http.cookies.CookieJar.clear` --- scrapy/http/cookies.py | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/scrapy/http/cookies.py b/scrapy/http/cookies.py index a1e95102e..4e8056750 100644 --- a/scrapy/http/cookies.py +++ b/scrapy/http/cookies.py @@ -58,8 +58,8 @@ class CookieJar(object): def clear_session_cookies(self, *args, **kwargs): return self.jar.clear_session_cookies(*args, **kwargs) - def clear(self): - return self.jar.clear() + def clear(self, domain=None, path=None, name=None): + return self.jar.clear(domain, path, name) def __iter__(self): return iter(self.jar) From 2dfc5d128bba42e2fe2bb24c0326fe47b0d3cd97 Mon Sep 17 00:00:00 2001 From: Ryan P Kilby Date: Wed, 9 May 2018 11:59:38 -0400 Subject: [PATCH 016/889] Update DEPTH_STATS refs to DEPTH_STATS_VERBOSE --- docs/topics/settings.rst | 11 ----------- docs/topics/spider-middleware.rst | 3 ++- scrapy/settings/default_settings.py | 2 +- 3 files changed, 3 insertions(+), 13 deletions(-) diff --git a/docs/topics/settings.rst b/docs/topics/settings.rst index 076dc6bfd..1f1217770 100644 --- a/docs/topics/settings.rst +++ b/docs/topics/settings.rst @@ -335,17 +335,6 @@ See also: :ref:`faq-bfo-dfo` about tuning Scrapy for BFO or DFO. other priority settings :setting:`REDIRECT_PRIORITY_ADJUST` and :setting:`RETRY_PRIORITY_ADJUST`. -.. setting:: DEPTH_STATS - -DEPTH_STATS ------------ - -Default: ``True`` - -Scope: ``scrapy.spidermiddlewares.depth.DepthMiddleware`` - -Whether to collect maximum depth stats. - .. setting:: DEPTH_STATS_VERBOSE DEPTH_STATS_VERBOSE diff --git a/docs/topics/spider-middleware.rst b/docs/topics/spider-middleware.rst index c297ed556..265acdb43 100644 --- a/docs/topics/spider-middleware.rst +++ b/docs/topics/spider-middleware.rst @@ -212,7 +212,8 @@ DepthMiddleware * :setting:`DEPTH_LIMIT` - The maximum depth that will be allowed to crawl for any site. If zero, no limit will be imposed. - * :setting:`DEPTH_STATS` - Whether to collect depth stats. + * :setting:`DEPTH_STATS_VERBOSE` - Whether to collect the number of + requests for each depth. * :setting:`DEPTH_PRIORITY` - Whether to prioritize the requests based on their depth. diff --git a/scrapy/settings/default_settings.py b/scrapy/settings/default_settings.py index 36e17ef6b..ca004aedd 100644 --- a/scrapy/settings/default_settings.py +++ b/scrapy/settings/default_settings.py @@ -55,7 +55,7 @@ DEFAULT_REQUEST_HEADERS = { } DEPTH_LIMIT = 0 -DEPTH_STATS = True +DEPTH_STATS_VERBOSE = False DEPTH_PRIORITY = 0 DNSCACHE_ENABLED = True From 6a182c955273745daf334033944c82da3aa4eb12 Mon Sep 17 00:00:00 2001 From: Ryan P Kilby Date: Wed, 9 May 2018 12:00:18 -0400 Subject: [PATCH 017/889] Depth stats are not optional --- scrapy/spidermiddlewares/depth.py | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/scrapy/spidermiddlewares/depth.py b/scrapy/spidermiddlewares/depth.py index e2f039146..34a87f2df 100644 --- a/scrapy/spidermiddlewares/depth.py +++ b/scrapy/spidermiddlewares/depth.py @@ -13,7 +13,7 @@ logger = logging.getLogger(__name__) class DepthMiddleware(object): - def __init__(self, maxdepth, stats=None, verbose_stats=False, prio=1): + def __init__(self, maxdepth, stats, verbose_stats=False, prio=1): self.maxdepth = maxdepth self.stats = stats self.verbose_stats = verbose_stats @@ -41,7 +41,7 @@ class DepthMiddleware(object): extra={'spider': spider} ) return False - elif self.stats: + else: if self.verbose_stats: self.stats.inc_value('request_depth_count/%s' % depth, spider=spider) @@ -50,7 +50,7 @@ class DepthMiddleware(object): return True # base case (depth=0) - if self.stats and 'depth' not in response.meta: + if 'depth' not in response.meta: response.meta['depth'] = 0 if self.verbose_stats: self.stats.inc_value('request_depth_count/0', spider=spider) From b364d27247b2d9b86c164569c7e0459fa3f8391b Mon Sep 17 00:00:00 2001 From: Vostretsov Nikita Date: Wed, 23 May 2018 21:25:50 +0300 Subject: [PATCH 018/889] [MRG+1] Automatic port selection for servicies in unit tests (#3210) * ability to pass port as a parameter * try to find free ports * use environment variables to pass mock server address * get mock server address from environment variables * ability to select ports for proxy in runtime * use common method for URLs from mock server * https support * get mock server address * get mock address * replace hand-written mechanism by kernel-based one * use ephemeral ports in mockserver * strip EOL from addresses * use ephemeral port in proxy * no need to restore environment as it is restored in tearDown * decode bytes * use mockserver address as a variable * ability to pass address as variable * per test-case mockserver * use base class * remove obsolete environment manipulation * return usage of proxy for http cases * common method for broking proxy auth credentials * python version-independent url methods --- tests/mockserver.py | 25 +++++++++--- tests/spiders.py | 17 ++++++--- tests/test_closespider.py | 8 ++-- tests/test_crawl.py | 48 ++++++++++++------------ tests/test_downloader_handlers.py | 8 ++-- tests/test_feedexport.py | 3 +- tests/test_pipeline_crawl.py | 16 ++++---- tests/test_proxy_connect.py | 41 ++++++++++++-------- tests/test_spidermiddleware_httperror.py | 23 ++++++------ 9 files changed, 111 insertions(+), 78 deletions(-) diff --git a/tests/mockserver.py b/tests/mockserver.py index 98723846e..f36ce3c44 100644 --- a/tests/mockserver.py +++ b/tests/mockserver.py @@ -192,9 +192,15 @@ class MockServer(): def __enter__(self): from scrapy.utils.test import get_testenv + self.proc = Popen([sys.executable, '-u', '-m', 'tests.mockserver'], stdout=PIPE, env=get_testenv()) - self.proc.stdout.readline() + http_address = self.proc.stdout.readline().strip().decode('ascii') + https_address = self.proc.stdout.readline().strip().decode('ascii') + + self.http_address = http_address + self.https_address = https_address + return self def __exit__(self, exc_type, exc_value, traceback): @@ -202,6 +208,12 @@ class MockServer(): self.proc.wait() time.sleep(0.2) + def url(self, path, is_secure=False): + host = self.http_address + if is_secure: + host = self.https_address + return host + path + def ssl_context_factory(keyfile='keys/localhost.key', certfile='keys/localhost.crt'): return ssl.DefaultOpenSSLContextFactory( @@ -213,14 +225,17 @@ def ssl_context_factory(keyfile='keys/localhost.key', certfile='keys/localhost.c if __name__ == "__main__": root = Root() factory = Site(root) - httpPort = reactor.listenTCP(8998, factory) + httpPort = reactor.listenTCP(0, factory) contextFactory = ssl_context_factory() - httpsPort = reactor.listenSSL(8999, factory, contextFactory) + httpsPort = reactor.listenSSL(0, factory, contextFactory) def print_listening(): httpHost = httpPort.getHost() httpsHost = httpsPort.getHost() - print("Mock server running at http://%s:%d and https://%s:%d" % ( - httpHost.host, httpHost.port, httpsHost.host, httpsHost.port)) + httpAddress = 'http://%s:%d' % (httpHost.host, httpHost.port) + httpsAddress = 'https://%s:%d' % (httpsHost.host, httpsHost.port) + print(httpAddress) + print(httpsAddress) + reactor.callWhenRunning(print_listening) reactor.run() diff --git a/tests/spiders.py b/tests/spiders.py index 1038b69de..7816bf7c7 100644 --- a/tests/spiders.py +++ b/tests/spiders.py @@ -11,7 +11,12 @@ from scrapy.item import Item from scrapy.linkextractors import LinkExtractor -class MetaSpider(Spider): +class MockServerSpider(Spider): + def __init__(self, mockserver=None, *args, **kwargs): + super(MockServerSpider, self).__init__(*args, **kwargs) + self.mockserver = mockserver + +class MetaSpider(MockServerSpider): name = 'meta' @@ -33,7 +38,7 @@ class FollowAllSpider(MetaSpider): self.urls_visited = [] self.times = [] qargs = {'total': total, 'show': show, 'order': order, 'maxlatency': maxlatency} - url = "http://localhost:8998/follow?%s" % urlencode(qargs, doseq=1) + url = self.mockserver.url("/follow?%s" % urlencode(qargs, doseq=1)) self.start_urls = [url] def parse(self, response): @@ -55,7 +60,7 @@ class DelaySpider(MetaSpider): def start_requests(self): self.t1 = time.time() - url = "http://localhost:8998/delay?n=%s&b=%s" % (self.n, self.b) + url = self.mockserver.url("/delay?n=%s&b=%s" % (self.n, self.b)) yield Request(url, callback=self.parse, errback=self.errback) def parse(self, response): @@ -121,7 +126,7 @@ class BrokenStartRequestsSpider(FollowAllSpider): for s in range(100): qargs = {'total': 10, 'seed': s} - url = "http://localhost:8998/follow?%s" % urlencode(qargs, doseq=1) + url = self.mockserver.url("/follow?%s") % urlencode(qargs, doseq=1) yield Request(url, meta={'seed': s}) if self.fail_yielding: 2 / 0 @@ -160,7 +165,7 @@ class SingleRequestSpider(MetaSpider): return self.errback_func(failure) -class DuplicateStartRequestsSpider(Spider): +class DuplicateStartRequestsSpider(MockServerSpider): dont_filter = True name = 'duplicatestartrequests' distinct_urls = 2 @@ -169,7 +174,7 @@ class DuplicateStartRequestsSpider(Spider): def start_requests(self): for i in range(0, self.distinct_urls): for j in range(0, self.dupe_factor): - url = "http://localhost:8998/echo?headers=1&body=test%d" % i + url = self.mockserver.url("/echo?headers=1&body=test%d" % i) yield Request(url, dont_filter=self.dont_filter) def __init__(self, url="http://localhost:8998", *args, **kwargs): diff --git a/tests/test_closespider.py b/tests/test_closespider.py index fa0b48998..0eb1b7944 100644 --- a/tests/test_closespider.py +++ b/tests/test_closespider.py @@ -18,7 +18,7 @@ class TestCloseSpider(TestCase): def test_closespider_itemcount(self): close_on = 5 crawler = get_crawler(ItemSpider, {'CLOSESPIDER_ITEMCOUNT': close_on}) - yield crawler.crawl() + yield crawler.crawl(mockserver=self.mockserver) reason = crawler.spider.meta['close_reason'] self.assertEqual(reason, 'closespider_itemcount') itemcount = crawler.stats.get_value('item_scraped_count') @@ -28,7 +28,7 @@ class TestCloseSpider(TestCase): def test_closespider_pagecount(self): close_on = 5 crawler = get_crawler(FollowAllSpider, {'CLOSESPIDER_PAGECOUNT': close_on}) - yield crawler.crawl() + yield crawler.crawl(mockserver=self.mockserver) reason = crawler.spider.meta['close_reason'] self.assertEqual(reason, 'closespider_pagecount') pagecount = crawler.stats.get_value('response_received_count') @@ -38,7 +38,7 @@ class TestCloseSpider(TestCase): def test_closespider_errorcount(self): close_on = 5 crawler = get_crawler(ErrorSpider, {'CLOSESPIDER_ERRORCOUNT': close_on}) - yield crawler.crawl(total=1000000) + yield crawler.crawl(total=1000000, mockserver=self.mockserver) reason = crawler.spider.meta['close_reason'] self.assertEqual(reason, 'closespider_errorcount') key = 'spider_exceptions/{name}'\ @@ -50,7 +50,7 @@ class TestCloseSpider(TestCase): def test_closespider_timeout(self): close_on = 0.1 crawler = get_crawler(FollowAllSpider, {'CLOSESPIDER_TIMEOUT': close_on}) - yield crawler.crawl(total=1000000) + yield crawler.crawl(total=1000000, mockserver=self.mockserver) reason = crawler.spider.meta['close_reason'] self.assertEqual(reason, 'closespider_timeout') stats = crawler.stats diff --git a/tests/test_crawl.py b/tests/test_crawl.py index d5babdded..3fc13eeb7 100644 --- a/tests/test_crawl.py +++ b/tests/test_crawl.py @@ -26,7 +26,7 @@ class CrawlTestCase(TestCase): @defer.inlineCallbacks def test_follow_all(self): crawler = self.runner.create_crawler(FollowAllSpider) - yield crawler.crawl() + yield crawler.crawl(mockserver=self.mockserver) self.assertEqual(len(crawler.spider.urls_visited), 11) # 10 + start_url @defer.inlineCallbacks @@ -42,7 +42,7 @@ class CrawlTestCase(TestCase): def _test_delay(self, delay, randomize): settings = {"DOWNLOAD_DELAY": delay, 'RANDOMIZE_DOWNLOAD_DELAY': randomize} crawler = CrawlerRunner(settings).create_crawler(FollowAllSpider) - yield crawler.crawl(maxlatency=delay * 2) + yield crawler.crawl(maxlatency=delay * 2, mockserver=self.mockserver) t = crawler.spider.times totaltime = t[-1] - t[0] avgd = totaltime / (len(t) - 1) @@ -53,7 +53,7 @@ class CrawlTestCase(TestCase): @defer.inlineCallbacks def test_timeout_success(self): crawler = self.runner.create_crawler(DelaySpider) - yield crawler.crawl(n=0.5) + yield crawler.crawl(n=0.5, mockserver=self.mockserver) self.assertTrue(crawler.spider.t1 > 0) self.assertTrue(crawler.spider.t2 > 0) self.assertTrue(crawler.spider.t2 > crawler.spider.t1) @@ -61,13 +61,13 @@ class CrawlTestCase(TestCase): @defer.inlineCallbacks def test_timeout_failure(self): crawler = CrawlerRunner({"DOWNLOAD_TIMEOUT": 0.35}).create_crawler(DelaySpider) - yield crawler.crawl(n=0.5) + yield crawler.crawl(n=0.5, mockserver=self.mockserver) self.assertTrue(crawler.spider.t1 > 0) self.assertTrue(crawler.spider.t2 == 0) self.assertTrue(crawler.spider.t2_err > 0) self.assertTrue(crawler.spider.t2_err > crawler.spider.t1) # server hangs after receiving response headers - yield crawler.crawl(n=0.5, b=1) + yield crawler.crawl(n=0.5, b=1, mockserver=self.mockserver) self.assertTrue(crawler.spider.t1 > 0) self.assertTrue(crawler.spider.t2 == 0) self.assertTrue(crawler.spider.t2_err > 0) @@ -77,14 +77,14 @@ class CrawlTestCase(TestCase): def test_retry_503(self): crawler = self.runner.create_crawler(SimpleSpider) with LogCapture() as l: - yield crawler.crawl("http://localhost:8998/status?n=503") + yield crawler.crawl(self.mockserver.url("/status?n=503"), mockserver=self.mockserver) self._assert_retried(l) @defer.inlineCallbacks def test_retry_conn_failed(self): crawler = self.runner.create_crawler(SimpleSpider) with LogCapture() as l: - yield crawler.crawl("http://localhost:65432/status?n=503") + yield crawler.crawl("http://localhost:65432/status?n=503", mockserver=self.mockserver) self._assert_retried(l) @defer.inlineCallbacks @@ -92,14 +92,14 @@ class CrawlTestCase(TestCase): crawler = self.runner.create_crawler(SimpleSpider) with LogCapture() as l: # try to fetch the homepage of a non-existent domain - yield crawler.crawl("http://dns.resolution.invalid./") + yield crawler.crawl("http://dns.resolution.invalid./", mockserver=self.mockserver) self._assert_retried(l) @defer.inlineCallbacks def test_start_requests_bug_before_yield(self): with LogCapture('scrapy', level=logging.ERROR) as l: crawler = self.runner.create_crawler(BrokenStartRequestsSpider) - yield crawler.crawl(fail_before_yield=1) + yield crawler.crawl(fail_before_yield=1, mockserver=self.mockserver) self.assertEqual(len(l.records), 1) record = l.records[0] @@ -110,7 +110,7 @@ class CrawlTestCase(TestCase): def test_start_requests_bug_yielding(self): with LogCapture('scrapy', level=logging.ERROR) as l: crawler = self.runner.create_crawler(BrokenStartRequestsSpider) - yield crawler.crawl(fail_yielding=1) + yield crawler.crawl(fail_yielding=1, mockserver=self.mockserver) self.assertEqual(len(l.records), 1) record = l.records[0] @@ -121,7 +121,7 @@ class CrawlTestCase(TestCase): def test_start_requests_lazyness(self): settings = {"CONCURRENT_REQUESTS": 1} crawler = CrawlerRunner(settings).create_crawler(BrokenStartRequestsSpider) - yield crawler.crawl() + yield crawler.crawl(mockserver=self.mockserver) #self.assertTrue(False, crawler.spider.seedsseen) #self.assertTrue(crawler.spider.seedsseen.index(None) < crawler.spider.seedsseen.index(99), # crawler.spider.seedsseen) @@ -130,10 +130,10 @@ class CrawlTestCase(TestCase): def test_start_requests_dupes(self): settings = {"CONCURRENT_REQUESTS": 1} crawler = CrawlerRunner(settings).create_crawler(DuplicateStartRequestsSpider) - yield crawler.crawl(dont_filter=True, distinct_urls=2, dupe_factor=3) + yield crawler.crawl(dont_filter=True, distinct_urls=2, dupe_factor=3, mockserver=self.mockserver) self.assertEqual(crawler.spider.visited, 6) - yield crawler.crawl(dont_filter=False, distinct_urls=3, dupe_factor=4) + yield crawler.crawl(dont_filter=False, distinct_urls=3, dupe_factor=4, mockserver=self.mockserver) self.assertEqual(crawler.spider.visited, 3) @defer.inlineCallbacks @@ -160,7 +160,7 @@ with multiples lines '''}) crawler = self.runner.create_crawler(SimpleSpider) with LogCapture() as l: - yield crawler.crawl("http://localhost:8998/raw?{0}".format(query)) + yield crawler.crawl(self.mockserver.url("/raw?{0}".format(query)), mockserver=self.mockserver) self.assertEqual(str(l).count("Got response 200"), 1) @defer.inlineCallbacks @@ -168,7 +168,7 @@ with multiples lines # connection lost after receiving data crawler = self.runner.create_crawler(SimpleSpider) with LogCapture() as l: - yield crawler.crawl("http://localhost:8998/drop?abort=0") + yield crawler.crawl(self.mockserver.url("/drop?abort=0"), mockserver=self.mockserver) self._assert_retried(l) @defer.inlineCallbacks @@ -176,7 +176,7 @@ with multiples lines # connection lost before receiving data crawler = self.runner.create_crawler(SimpleSpider) with LogCapture() as l: - yield crawler.crawl("http://localhost:8998/drop?abort=1") + yield crawler.crawl(self.mockserver.url("/drop?abort=1"), mockserver=self.mockserver) self._assert_retried(l) def _assert_retried(self, log): @@ -186,7 +186,7 @@ with multiples lines @defer.inlineCallbacks def test_referer_header(self): """Referer header is set by RefererMiddleware unless it is already set""" - req0 = Request('http://localhost:8998/echo?headers=1&body=0', dont_filter=1) + req0 = Request(self.mockserver.url('/echo?headers=1&body=0'), dont_filter=1) req1 = req0.replace() req2 = req0.replace(headers={'Referer': None}) req3 = req0.replace(headers={'Referer': 'http://example.com'}) @@ -194,7 +194,7 @@ with multiples lines req1.meta['next'] = req2 req2.meta['next'] = req3 crawler = self.runner.create_crawler(SingleRequestSpider) - yield crawler.crawl(seed=req0) + yield crawler.crawl(seed=req0, mockserver=self.mockserver) # basic asserts in case of weird communication errors self.assertIn('responses', crawler.spider.meta) self.assertNotIn('failures', crawler.spider.meta) @@ -220,7 +220,7 @@ with multiples lines est.append(get_engine_status(crawler.engine)) crawler = self.runner.create_crawler(SingleRequestSpider) - yield crawler.crawl(seed='http://localhost:8998/', callback_func=cb) + yield crawler.crawl(seed=self.mockserver.url('/'), callback_func=cb, mockserver=self.mockserver) self.assertEqual(len(est), 1, est) s = dict(est[0]) self.assertEqual(s['engine.spider.name'], crawler.spider.name) @@ -244,7 +244,7 @@ with multiples lines raise TestError crawler = self.runner.create_crawler(FaultySpider) - yield self.assertFailure(crawler.crawl(), TestError) + yield self.assertFailure(crawler.crawl(mockserver=self.mockserver), TestError) self.assertFalse(crawler.crawling) @defer.inlineCallbacks @@ -256,7 +256,7 @@ with multiples lines } crawler = CrawlerRunner(settings).create_crawler(SimpleSpider) yield self.assertFailure( - self.runner.crawl(crawler, "http://localhost:8998/status?n=200"), + self.runner.crawl(crawler, self.mockserver.url("/status?n=200"), mockserver=self.mockserver), ZeroDivisionError) self.assertFalse(crawler.crawling) @@ -264,13 +264,13 @@ with multiples lines def test_crawlerrunner_accepts_crawler(self): crawler = self.runner.create_crawler(SimpleSpider) with LogCapture() as log: - yield self.runner.crawl(crawler, "http://localhost:8998/status?n=200") + yield self.runner.crawl(crawler, self.mockserver.url("/status?n=200"), mockserver=self.mockserver) self.assertIn("Got response 200", str(log)) @defer.inlineCallbacks def test_crawl_multiple(self): - self.runner.crawl(SimpleSpider, "http://localhost:8998/status?n=200") - self.runner.crawl(SimpleSpider, "http://localhost:8998/status?n=503") + self.runner.crawl(SimpleSpider, self.mockserver.url("/status?n=200"), mockserver=self.mockserver) + self.runner.crawl(SimpleSpider, self.mockserver.url("/status?n=503"), mockserver=self.mockserver) with LogCapture() as log: yield self.runner.join() diff --git a/tests/test_downloader_handlers.py b/tests/test_downloader_handlers.py index b34faa7e7..c91be2c0c 100644 --- a/tests/test_downloader_handlers.py +++ b/tests/test_downloader_handlers.py @@ -534,14 +534,14 @@ class Http11MockServerTestCase(unittest.TestCase): crawler = get_crawler(SingleRequestSpider) # http://localhost:8998/partial set Content-Length to 1024, use download_maxsize= 1000 to avoid # download it - yield crawler.crawl(seed=Request(url='http://localhost:8998/partial', meta={'download_maxsize': 1000})) + yield crawler.crawl(seed=Request(url=self.mockserver.url('/partial'), meta={'download_maxsize': 1000})) failure = crawler.spider.meta['failure'] self.assertIsInstance(failure.value, defer.CancelledError) @defer.inlineCallbacks def test_download(self): crawler = get_crawler(SingleRequestSpider) - yield crawler.crawl(seed=Request(url='http://localhost:8998')) + yield crawler.crawl(seed=Request(url=self.mockserver.url(''))) failure = crawler.spider.meta.get('failure') self.assertTrue(failure == None) reason = crawler.spider.meta['close_reason'] @@ -551,7 +551,7 @@ class Http11MockServerTestCase(unittest.TestCase): def test_download_gzip_response(self): crawler = get_crawler(SingleRequestSpider) body = b'1' * 100 # PayloadResource requires body length to be 100 - request = Request('http://localhost:8998/payload', method='POST', + request = Request(self.mockserver.url('/payload'), method='POST', body=body, meta={'download_maxsize': 50}) yield crawler.crawl(seed=request) failure = crawler.spider.meta['failure'] @@ -560,7 +560,7 @@ class Http11MockServerTestCase(unittest.TestCase): if six.PY2: request.headers.setdefault(b'Accept-Encoding', b'gzip,deflate') - request = request.replace(url='http://localhost:8998/xpayload') + request = request.replace(url=self.mockserver.url('/xpayload')) yield crawler.crawl(seed=request) # download_maxsize = 50 is enough for the gzipped response failure = crawler.spider.meta.get('failure') diff --git a/tests/test_feedexport.py b/tests/test_feedexport.py index f55927121..0d9f1e83c 100644 --- a/tests/test_feedexport.py +++ b/tests/test_feedexport.py @@ -179,6 +179,7 @@ class FeedExportTest(unittest.TestCase): try: with MockServer() as s: runner = CrawlerRunner(Settings(defaults)) + spider_cls.start_urls = [s.url('/')] yield runner.crawl(spider_cls) with open(res_name, 'rb') as f: @@ -194,7 +195,6 @@ class FeedExportTest(unittest.TestCase): """ class TestSpider(scrapy.Spider): name = 'testspider' - start_urls = ['http://localhost:8998/'] def parse(self, response): for item in items: @@ -210,7 +210,6 @@ class FeedExportTest(unittest.TestCase): """ class TestSpider(scrapy.Spider): name = 'testspider' - start_urls = ['http://localhost:8998/'] def parse(self, response): pass diff --git a/tests/test_pipeline_crawl.py b/tests/test_pipeline_crawl.py index 9b81f827d..5985a6f3e 100644 --- a/tests/test_pipeline_crawl.py +++ b/tests/test_pipeline_crawl.py @@ -46,7 +46,7 @@ class RedirectedMediaDownloadSpider(MediaDownloadSpider): def _process_url(self, url): return add_or_replace_parameter( - 'http://localhost:8998/redirect-to', + self.mockserver.url('/redirect-to'), 'goto', url) @@ -134,7 +134,7 @@ class FileDownloadCrawlTestCase(TestCase): def test_download_media(self): crawler = self._create_crawler(MediaDownloadSpider) with LogCapture() as log: - yield crawler.crawl("http://localhost:8998/files/images/", + yield crawler.crawl(self.mockserver.url("/files/images/"), media_key=self.media_key, media_urls_key=self.media_urls_key) self._assert_files_downloaded(self.items, str(log)) @@ -143,7 +143,7 @@ class FileDownloadCrawlTestCase(TestCase): def test_download_media_wrong_urls(self): crawler = self._create_crawler(BrokenLinksMediaDownloadSpider) with LogCapture() as log: - yield crawler.crawl("http://localhost:8998/files/images/", + yield crawler.crawl(self.mockserver.url("/files/images/"), media_key=self.media_key, media_urls_key=self.media_urls_key) self._assert_files_download_failure(crawler, self.items, 404, str(log)) @@ -152,9 +152,10 @@ class FileDownloadCrawlTestCase(TestCase): def test_download_media_redirected_default_failure(self): crawler = self._create_crawler(RedirectedMediaDownloadSpider) with LogCapture() as log: - yield crawler.crawl("http://localhost:8998/files/images/", + yield crawler.crawl(self.mockserver.url("/files/images/"), media_key=self.media_key, - media_urls_key=self.media_urls_key) + media_urls_key=self.media_urls_key, + mockserver=self.mockserver) self._assert_files_download_failure(crawler, self.items, 302, str(log)) @defer.inlineCallbacks @@ -165,9 +166,10 @@ class FileDownloadCrawlTestCase(TestCase): crawler = self._create_crawler(RedirectedMediaDownloadSpider) with LogCapture() as log: - yield crawler.crawl("http://localhost:8998/files/images/", + yield crawler.crawl(self.mockserver.url("/files/images/"), media_key=self.media_key, - media_urls_key=self.media_urls_key) + media_urls_key=self.media_urls_key, + mockserver=self.mockserver) self._assert_files_downloaded(self.items, str(log)) self.assertEqual(crawler.stats.get_value('downloader/response_status_count/302'), 3) diff --git a/tests/test_proxy_connect.py b/tests/test_proxy_connect.py index 6213a51e8..ae1236bcb 100644 --- a/tests/test_proxy_connect.py +++ b/tests/test_proxy_connect.py @@ -2,6 +2,7 @@ import json import os import time +from six.moves.urllib.parse import urlsplit, urlunsplit from threading import Thread from libmproxy import controller, proxy from netlib import http_auth @@ -17,7 +18,7 @@ from tests.mockserver import MockServer class HTTPSProxy(controller.Master, Thread): - def __init__(self, port): + def __init__(self): password_manager = http_auth.PassManSingleUser('scrapy', 'scrapy') authenticator = http_auth.BasicProxyAuth(password_manager, "mitmproxy") cert_path = os.path.join(os.path.abspath(os.path.dirname(__file__)), @@ -25,10 +26,19 @@ class HTTPSProxy(controller.Master, Thread): server = proxy.ProxyServer(proxy.ProxyConfig( authenticator = authenticator, cacert = cert_path), - port) + 0) + self.server = server Thread.__init__(self) controller.Master.__init__(self, server) + def http_address(self): + return 'http://scrapy:scrapy@%s:%d' % self.server.socket.getsockname() + + +def _wrong_credentials(proxy_url): + bad_auth_proxy = list(urlsplit(proxy_url)) + bad_auth_proxy[1] = bad_auth_proxy[1].replace('scrapy:scrapy@', 'wrong:wronger@') + return urlunsplit(bad_auth_proxy) class ProxyConnectTestCase(TestCase): @@ -36,12 +46,14 @@ class ProxyConnectTestCase(TestCase): self.mockserver = MockServer() self.mockserver.__enter__() self._oldenv = os.environ.copy() - self._proxy = HTTPSProxy(8888) + + self._proxy = HTTPSProxy() self._proxy.start() + # Wait for the proxy to start. time.sleep(1.0) - os.environ['http_proxy'] = 'http://scrapy:scrapy@localhost:8888' - os.environ['https_proxy'] = 'http://scrapy:scrapy@localhost:8888' + os.environ['https_proxy'] = self._proxy.http_address() + os.environ['http_proxy'] = self._proxy.http_address() def tearDown(self): self.mockserver.__exit__(None, None, None) @@ -52,17 +64,17 @@ class ProxyConnectTestCase(TestCase): def test_https_connect_tunnel(self): crawler = get_crawler(SimpleSpider) with LogCapture() as l: - yield crawler.crawl("https://localhost:8999/status?n=200") + yield crawler.crawl(self.mockserver.url("/status?n=200", is_secure=True)) self._assert_got_response_code(200, l) @defer.inlineCallbacks def test_https_noconnect(self): - os.environ['https_proxy'] = 'http://scrapy:scrapy@localhost:8888?noconnect' + proxy = os.environ['https_proxy'] + os.environ['https_proxy'] = proxy + '?noconnect' crawler = get_crawler(SimpleSpider) with LogCapture() as l: - yield crawler.crawl("https://localhost:8999/status?n=200") + yield crawler.crawl(self.mockserver.url("/status?n=200", is_secure=True)) self._assert_got_response_code(200, l) - os.environ['https_proxy'] = 'http://scrapy:scrapy@localhost:8888' @defer.inlineCallbacks def test_https_connect_tunnel_error(self): @@ -73,18 +85,17 @@ class ProxyConnectTestCase(TestCase): @defer.inlineCallbacks def test_https_tunnel_auth_error(self): - os.environ['https_proxy'] = 'http://wrong:wronger@localhost:8888' + os.environ['https_proxy'] = _wrong_credentials(os.environ['https_proxy']) crawler = get_crawler(SimpleSpider) with LogCapture() as l: - yield crawler.crawl("https://localhost:8999/status?n=200") + yield crawler.crawl(self.mockserver.url("/status?n=200", is_secure=True)) # The proxy returns a 407 error code but it does not reach the client; # he just sees a TunnelError. self._assert_got_tunnel_error(l) - os.environ['https_proxy'] = 'http://scrapy:scrapy@localhost:8888' @defer.inlineCallbacks def test_https_tunnel_without_leak_proxy_authorization_header(self): - request = Request("https://localhost:8999/echo") + request = Request(self.mockserver.url("/echo", is_secure=True)) crawler = get_crawler(SingleRequestSpider) with LogCapture() as l: yield crawler.crawl(seed=request) @@ -94,10 +105,10 @@ class ProxyConnectTestCase(TestCase): @defer.inlineCallbacks def test_https_noconnect_auth_error(self): - os.environ['https_proxy'] = 'http://wrong:wronger@localhost:8888?noconnect' + os.environ['https_proxy'] = _wrong_credentials(os.environ['https_proxy']) + '?noconnect' crawler = get_crawler(SimpleSpider) with LogCapture() as l: - yield crawler.crawl("https://localhost:8999/status?n=200") + yield crawler.crawl(self.mockserver.url("/status?n=200", is_secure=True)) self._assert_got_response_code(407, l) def _assert_got_response_code(self, code, log): diff --git a/tests/test_spidermiddleware_httperror.py b/tests/test_spidermiddleware_httperror.py index 19e6bbdcd..dacd0147f 100644 --- a/tests/test_spidermiddleware_httperror.py +++ b/tests/test_spidermiddleware_httperror.py @@ -11,20 +11,21 @@ from scrapy.http import Response, Request from scrapy.spiders import Spider from scrapy.spidermiddlewares.httperror import HttpErrorMiddleware, HttpError from scrapy.settings import Settings +from tests.spiders import MockServerSpider -class _HttpErrorSpider(Spider): +class _HttpErrorSpider(MockServerSpider): name = 'httperror' - start_urls = [ - "http://localhost:8998/status?n=200", - "http://localhost:8998/status?n=404", - "http://localhost:8998/status?n=402", - "http://localhost:8998/status?n=500", - ] bypass_status_codes = set() def __init__(self, *args, **kwargs): super(_HttpErrorSpider, self).__init__(*args, **kwargs) + self.start_urls = [ + self.mockserver.url("/status?n=200"), + self.mockserver.url("/status?n=404"), + self.mockserver.url("/status?n=402"), + self.mockserver.url("/status?n=500"), + ] self.failed = set() self.skipped = set() self.parsed = set() @@ -169,7 +170,7 @@ class TestHttpErrorMiddlewareIntegrational(TrialTestCase): @defer.inlineCallbacks def test_middleware_works(self): crawler = get_crawler(_HttpErrorSpider) - yield crawler.crawl() + yield crawler.crawl(mockserver=self.mockserver) assert not crawler.spider.skipped, crawler.spider.skipped self.assertEqual(crawler.spider.parsed, {'200'}) self.assertEqual(crawler.spider.failed, {'404', '402', '500'}) @@ -184,7 +185,7 @@ class TestHttpErrorMiddlewareIntegrational(TrialTestCase): def test_logging(self): crawler = get_crawler(_HttpErrorSpider) with LogCapture() as log: - yield crawler.crawl(bypass_status_codes={402}) + yield crawler.crawl(mockserver=self.mockserver, bypass_status_codes={402}) self.assertEqual(crawler.spider.parsed, {'200', '402'}) self.assertEqual(crawler.spider.skipped, {'402'}) self.assertEqual(crawler.spider.failed, {'404', '500'}) @@ -199,7 +200,7 @@ class TestHttpErrorMiddlewareIntegrational(TrialTestCase): # HttpError logs ignored responses with level INFO crawler = get_crawler(_HttpErrorSpider) with LogCapture(level=logging.INFO) as log: - yield crawler.crawl() + yield crawler.crawl(mockserver=self.mockserver) self.assertEqual(crawler.spider.parsed, {'200'}) self.assertEqual(crawler.spider.failed, {'404', '402', '500'}) @@ -211,7 +212,7 @@ class TestHttpErrorMiddlewareIntegrational(TrialTestCase): # with level WARNING, we shouldn't capture anything from HttpError crawler = get_crawler(_HttpErrorSpider) with LogCapture(level=logging.WARNING) as log: - yield crawler.crawl() + yield crawler.crawl(mockserver=self.mockserver) self.assertEqual(crawler.spider.parsed, {'200'}) self.assertEqual(crawler.spider.failed, {'404', '402', '500'}) From ffa7bede17088e5eebd50305704906bf1451ab3a Mon Sep 17 00:00:00 2001 From: Kevin Tewouda Date: Wed, 30 May 2018 06:33:18 +0200 Subject: [PATCH 019/889] Update spiders.rst I changed URLs to :class:`~scrapy.http.Request` in start_urls explanation of the default spider --- docs/topics/spiders.rst | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/docs/topics/spiders.rst b/docs/topics/spiders.rst index c2c271245..697732b47 100644 --- a/docs/topics/spiders.rst +++ b/docs/topics/spiders.rst @@ -88,7 +88,7 @@ scrapy.Spider A list of URLs where the spider will begin to crawl from, when no particular URLs are specified. So, the first pages downloaded will be those - listed here. The subsequent URLs will be generated successively from data + listed here. The subsequent :class:`~scrapy.http.Request` will be generated successively from data contained in the start URLs. .. attribute:: custom_settings From ecdd888ff4614a0e994c9dadb31b7c9c85c88e8a Mon Sep 17 00:00:00 2001 From: Chris Slothouber Date: Fri, 1 Jun 2018 09:25:34 -0400 Subject: [PATCH 020/889] Minor edits to contributing.rst Corrected minor grammatical issues and increased clarity of instructions. --- docs/contributing.rst | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/docs/contributing.rst b/docs/contributing.rst index f4f9e393f..6615840f7 100644 --- a/docs/contributing.rst +++ b/docs/contributing.rst @@ -48,9 +48,9 @@ guidelines when reporting a new bug. `Stack Overflow `__ (use "scrapy" tag). -* check the `open issues`_ to see if it has already been reported. If it has, - don't dismiss the report, but check the ticket history and comments. If you - have additional useful information, please leave a comment, or consider +* check the `open issues`_ to see if the issue has already been reported. If it + has, don't dismiss the report, but check the ticket history and comments. If + you have additional useful information, please leave a comment, or consider :ref:`sending a pull request ` with a fix. * search the `scrapy-users`_ list and `Scrapy subreddit`_ to see if it has @@ -122,7 +122,7 @@ conversation in the `Scrapy subreddit`_ to discuss your idea first. Sometimes there is an existing pull request for the problem you'd like to solve, which is stalled for some reason. Often the pull request is in a right direction, but changes are requested by Scrapy maintainers, and the -original pull request author haven't had time to address them. +original pull request author hasn't had time to address them. In this case consider picking up this pull request: open a new pull request with all commits from the original pull request, as well as additional changes to address the raised issues. Doing so helps a lot; it is @@ -143,7 +143,7 @@ instead of "Fix for #411". Complete titles make it easy to skim through the issue tracker. Finally, try to keep aesthetic changes (:pep:`8` compliance, unused imports -removal, etc) in separate commits than functional changes. This will make pull +removal, etc) in separate commits from functional changes. This will make pull requests easier to review and more likely to get merged. Coding style @@ -170,7 +170,7 @@ Documentation policies **do** provide a docstring, but make sure sphinx documentation uses autodoc_ extension to pull the docstring. For example, the :meth:`ItemLoader.add_value` method should be either - documented only in the sphinx documentation (not it a docstring), or + documented only in the sphinx documentation (not as a docstring), or it should have a docstring which is pulled to sphinx documentation using autodoc_ extension. From 6a2d2c3b77bde1d74b46d7dbfb9488cb06e5021f Mon Sep 17 00:00:00 2001 From: Fredrik Bergenlid Date: Fri, 1 Jun 2018 21:38:07 +0200 Subject: [PATCH 021/889] Improve gunzip performance for big files --- scrapy/utils/gz.py | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/scrapy/utils/gz.py b/scrapy/utils/gz.py index 16c9ce539..ec3949651 100644 --- a/scrapy/utils/gz.py +++ b/scrapy/utils/gz.py @@ -30,25 +30,25 @@ def gunzip(data): This is resilient to CRC checksum errors. """ f = GzipFile(fileobj=BytesIO(data)) - output = b'' + output_list = [] chunk = b'.' while chunk: try: chunk = read1(f, 8196) - output += chunk + output_list.append(chunk) except (IOError, EOFError, struct.error): # complete only if there is some data, otherwise re-raise # see issue 87 about catching struct.error - # some pages are quite small so output is '' and f.extrabuf + # some pages are quite small so output_list is empty and f.extrabuf # contains the whole page content - if output or getattr(f, 'extrabuf', None): + if output_list or getattr(f, 'extrabuf', None): try: - output += f.extrabuf[-f.extrasize:] + output_list.append(f.extrabuf[-f.extrasize:]) finally: break else: raise - return output + return b''.join(output_list) _is_gzipped = re.compile(br'^application/(x-)?gzip\b', re.I).search _is_octetstream = re.compile(br'^(application|binary)/octet-stream\b', re.I).search From 98d9093dc7241b32b927e79ff2f8a475ae5659a6 Mon Sep 17 00:00:00 2001 From: Colton Herinckx Date: Mon, 14 May 2018 13:37:16 -0700 Subject: [PATCH 022/889] minor grammatical fixes in CODE_OF_CONDUCT.md --- CODE_OF_CONDUCT.md | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/CODE_OF_CONDUCT.md b/CODE_OF_CONDUCT.md index 162602248..d477168eb 100644 --- a/CODE_OF_CONDUCT.md +++ b/CODE_OF_CONDUCT.md @@ -3,7 +3,7 @@ ## Our Pledge In the interest of fostering an open and welcoming environment, we as -contributors and maintainers pledge to making participation in our project and +contributors and maintainers pledge to make participation in our project and our community a harassment-free experience for everyone, regardless of age, body size, disability, ethnicity, gender identity and expression, level of experience, nationality, personal appearance, race, religion, or sexual identity and From 9bd5444a42e82a05d2791fd10a205a9dd99303a6 Mon Sep 17 00:00:00 2001 From: Colton Herinckx Date: Mon, 14 May 2018 13:48:28 -0700 Subject: [PATCH 023/889] added oxford commas to LICENSE --- LICENSE | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/LICENSE b/LICENSE index 6ead05ece..4d0a0863a 100644 --- a/LICENSE +++ b/LICENSE @@ -5,10 +5,10 @@ Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: 1. Redistributions of source code must retain the above copyright notice, - this list of conditions and the following disclaimer. + this list of conditions, and the following disclaimer. 2. Redistributions in binary form must reproduce the above copyright - notice, this list of conditions and the following disclaimer in the + notice, this list of conditions, and the following disclaimer in the documentation and/or other materials provided with the distribution. 3. Neither the name of Scrapy nor the names of its contributors may be used From 12d10eec2cb10fb13cf199d73363093478e80f9a Mon Sep 17 00:00:00 2001 From: Colton Herinckx Date: Mon, 14 May 2018 13:53:53 -0700 Subject: [PATCH 024/889] changed Twisted >= 17.9.0 to Twisted>=17.9.0 --- requirements-py3.txt | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/requirements-py3.txt b/requirements-py3.txt index 2aae3ae65..1f342cfbb 100644 --- a/requirements-py3.txt +++ b/requirements-py3.txt @@ -1,4 +1,4 @@ -Twisted >= 17.9.0 +Twisted>=17.9.0 lxml>=3.2.4 pyOpenSSL>=0.13.1 cssselect>=0.9 From 596f39600dfa94504b585ef65b1b04571a631447 Mon Sep 17 00:00:00 2001 From: Colton Herinckx Date: Sat, 19 May 2018 16:32:55 -0700 Subject: [PATCH 025/889] reversed earlier change that seemed to cause Travis CI build failure --- requirements-py3.txt | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/requirements-py3.txt b/requirements-py3.txt index 1f342cfbb..2aae3ae65 100644 --- a/requirements-py3.txt +++ b/requirements-py3.txt @@ -1,4 +1,4 @@ -Twisted>=17.9.0 +Twisted >= 17.9.0 lxml>=3.2.4 pyOpenSSL>=0.13.1 cssselect>=0.9 From d4511667fb5df63058accfe731e3d4160e795ee8 Mon Sep 17 00:00:00 2001 From: mugayoshi Date: Sat, 9 Jun 2018 18:17:11 +0900 Subject: [PATCH 026/889] Update debugging memory leaks section in the docs Add Python3 tools description. --- docs/topics/leaks.rst | 45 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 45 insertions(+) diff --git a/docs/topics/leaks.rst b/docs/topics/leaks.rst index 92590c180..af14d14e8 100644 --- a/docs/topics/leaks.rst +++ b/docs/topics/leaks.rst @@ -202,6 +202,7 @@ memory leaks (Requests, Responses, Items, and Selectors). However, there are other cases where the memory leaks could come from other (more or less obscure) objects. If this is your case, and you can't find your leaks using ``trackref``, you still have another resource: the `Guppy library`_. +If you're using Python3, see :ref:`topics-leaks-muppy`. .. _Guppy library: https://pypi.python.org/pypi/guppy @@ -253,6 +254,50 @@ knowledge about Python internals. For more info about Guppy, refer to the .. _Guppy documentation: http://guppy-pe.sourceforge.net/ +.. _topics-leaks-muppy: + +Debugging memory leaks with muppy +================================= +If you're using Python 3, you can use muppy from `Pympler`_. + +.. _Pympler: https://pypi.org/project/Pympler/ + +If you use ``pip``, you can install muppy with the following command:: + + pip install Pympler + +Here's an example to view all Python objects available in +the heap using muppy:: + + >>> from pympler import muppy + >>> all_objects = muppy.get_objects() + >>> len(all_objects) + 28667 + >>> from pympler import summary + >>> suml = summary.summarize(all_objects) + >>> summary.print_(suml) + types | # objects | total size + ==================================== | =========== | ============ + Date: Wed, 13 Jun 2018 18:11:43 -0300 Subject: [PATCH 027/889] Include Python version indication to each required library used in S3 storage --- docs/topics/feed-exports.rst | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/docs/topics/feed-exports.rst b/docs/topics/feed-exports.rst index 135d05c93..b64dbfbfd 100644 --- a/docs/topics/feed-exports.rst +++ b/docs/topics/feed-exports.rst @@ -177,7 +177,7 @@ The feeds are stored on `Amazon S3`_. * ``s3://mybucket/path/to/export.csv`` * ``s3://aws_key:aws_secret@mybucket/path/to/export.csv`` - * Required external libraries: `botocore`_ or `boto`_ + * Required external libraries: `botocore`_ (Python 2 and Python 3) or `boto`_ (Python 2 only) The AWS credentials can be passed as user/password in the URI, or they can be passed through the following settings: From 72d0899bce06190de5a453b24dd66c8910e6d0ee Mon Sep 17 00:00:00 2001 From: Vostretsov Nikita Date: Thu, 14 Jun 2018 17:58:48 +0300 Subject: [PATCH 028/889] Return non-zero exit code from scrapy commands in case of spider bootstrap errors * method to detect spider creation in crawler * correct method name * method to know if crawlers has spiders * we do not need to issue requests * set exit code accordingly to spiders in crawlers * more portable way to check ofr exceptions * more clear way * test cases for several spiders per crawler * grammatically correct name for method * method is private * grammatically correct name for method * method is private * remove unused import * correct order of imports * changes mechanism of obtaining spider status from method to object member * rename tests --- scrapy/commands/crawl.py | 3 ++ scrapy/commands/runspider.py | 3 ++ scrapy/crawler.py | 2 ++ tests/test_commands.py | 12 +++++++ tests/test_crawler.py | 64 +++++++++++++++++++++++++++++++++++- 5 files changed, 83 insertions(+), 1 deletion(-) diff --git a/scrapy/commands/crawl.py b/scrapy/commands/crawl.py index 4b986bf9d..8093fd402 100644 --- a/scrapy/commands/crawl.py +++ b/scrapy/commands/crawl.py @@ -56,3 +56,6 @@ class Command(ScrapyCommand): self.crawler_process.crawl(spname, **opts.spargs) self.crawler_process.start() + + if self.crawler_process.bootstrap_failed: + self.exitcode = 1 diff --git a/scrapy/commands/runspider.py b/scrapy/commands/runspider.py index a98033dd1..376d3c84e 100644 --- a/scrapy/commands/runspider.py +++ b/scrapy/commands/runspider.py @@ -87,3 +87,6 @@ class Command(ScrapyCommand): self.crawler_process.crawl(spidercls, **opts.spargs) self.crawler_process.start() + + if self.crawler_process.bootstrap_failed: + self.exitcode = 1 diff --git a/scrapy/crawler.py b/scrapy/crawler.py index 5cbc2d7c5..04aee18ed 100644 --- a/scrapy/crawler.py +++ b/scrapy/crawler.py @@ -137,6 +137,7 @@ class CrawlerRunner(object): self.spider_loader = _get_spider_loader(settings) self._crawlers = set() self._active = set() + self.bootstrap_failed = False @property def spiders(self): @@ -178,6 +179,7 @@ class CrawlerRunner(object): def _done(result): self.crawlers.discard(crawler) self._active.discard(d) + self.bootstrap_failed |= not getattr(crawler, 'spider', None) return result return d.addBoth(_done) diff --git a/tests/test_commands.py b/tests/test_commands.py index cb1301c95..7d9071b64 100644 --- a/tests/test_commands.py +++ b/tests/test_commands.py @@ -1,3 +1,4 @@ +import inspect import os import sys import subprocess @@ -17,6 +18,7 @@ from scrapy.utils.python import retry_on_eintr from scrapy.utils.test import get_testenv from scrapy.utils.testsite import SiteTest from scrapy.utils.testproc import ProcessTest +from tests.test_crawler import ExceptionSpider, NoRequestsSpider class ProjectTest(unittest.TestCase): @@ -220,6 +222,16 @@ class MySpider(scrapy.Spider): self.assertIn("INFO: Closing spider (finished)", log) self.assertIn("INFO: Spider closed (finished)", log) + def test_run_fail_spider(self): + proc = self.runspider("import scrapy\n" + inspect.getsource(ExceptionSpider)) + ret = proc.returncode + self.assertNotEqual(ret, 0) + + def test_run_good_spider(self): + proc = self.runspider("import scrapy\n" + inspect.getsource(NoRequestsSpider)) + ret = proc.returncode + self.assertEqual(ret, 0) + def test_runspider_log_level(self): log = self.get_log(self.debug_log_spider, args=('-s', 'LOG_LEVEL=INFO')) diff --git a/tests/test_crawler.py b/tests/test_crawler.py index ba0d709ff..d3b80f460 100644 --- a/tests/test_crawler.py +++ b/tests/test_crawler.py @@ -4,6 +4,9 @@ import tempfile import warnings import unittest +from twisted.internet import defer +import twisted.trial.unittest + import scrapy from scrapy.crawler import Crawler, CrawlerRunner, CrawlerProcess from scrapy.settings import Settings, default_settings @@ -11,9 +14,9 @@ from scrapy.spiderloader import SpiderLoader from scrapy.utils.log import configure_logging, get_scrapy_root_handler from scrapy.utils.spider import DefaultSpider from scrapy.utils.misc import load_object +from scrapy.utils.test import get_crawler from scrapy.extensions.throttle import AutoThrottle - class BaseCrawlerTest(unittest.TestCase): def assertOptionIsDefault(self, settings, key): @@ -181,3 +184,62 @@ class CrawlerProcessTest(BaseCrawlerTest): def test_crawler_process_accepts_None(self): runner = CrawlerProcess() self.assertOptionIsDefault(runner.settings, 'RETRY_ENABLED') + + +class ExceptionSpider(scrapy.Spider): + name = 'exception' + + @classmethod + def from_crawler(cls, crawler, *args, **kwargs): + raise ValueError('Exception in from_crawler method') + + +class NoRequestsSpider(scrapy.Spider): + name = 'no_request' + + def start_requests(self): + return [] + + +class CrawlerRunnerHasSpider(twisted.trial.unittest.TestCase): + + @defer.inlineCallbacks + def test_crawler_runner_bootstrap_successful(self): + runner = CrawlerRunner() + yield runner.crawl(NoRequestsSpider) + self.assertEqual(runner.bootstrap_failed, False) + + @defer.inlineCallbacks + def test_crawler_runner_bootstrap_successful_for_several(self): + runner = CrawlerRunner() + yield runner.crawl(NoRequestsSpider) + yield runner.crawl(NoRequestsSpider) + self.assertEqual(runner.bootstrap_failed, False) + + @defer.inlineCallbacks + def test_crawler_runner_bootstrap_failed(self): + runner = CrawlerRunner() + + try: + yield runner.crawl(ExceptionSpider) + except ValueError: + pass + else: + self.fail('Exception should be raised from spider') + + self.assertEqual(runner.bootstrap_failed, True) + + @defer.inlineCallbacks + def test_crawler_runner_bootstrap_failed_for_several(self): + runner = CrawlerRunner() + + try: + yield runner.crawl(ExceptionSpider) + except ValueError: + pass + else: + self.fail('Exception should be raised from spider') + + yield runner.crawl(NoRequestsSpider) + + self.assertEqual(runner.bootstrap_failed, True) From 7a601d76de7adc37571815a7d08f84e1e26f7507 Mon Sep 17 00:00:00 2001 From: Leo Date: Tue, 19 Jun 2018 10:51:55 +0200 Subject: [PATCH 029/889] fix typo extractred --> extracted --- docs/news.rst | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/docs/news.rst b/docs/news.rst index 1629510b2..1b8d121a1 100644 --- a/docs/news.rst +++ b/docs/news.rst @@ -156,7 +156,7 @@ attributes with ``FormRequest``. **Please also note that link extractors do not canonicalize URLs by default anymore.** This was puzzling users every now and then, and it's not what -browsers do in fact, so we removed that extra transformation on extractred +browsers do in fact, so we removed that extra transformation on extracted links. For those of you wanting more control on the ``Referer:`` header that Scrapy From 88bd067912ee94e2a6d2e1ba5b0d5db1241b7621 Mon Sep 17 00:00:00 2001 From: Grammy Jiang Date: Wed, 20 Jun 2018 16:56:46 +0800 Subject: [PATCH 030/889] fix the test case name of HttpProxyMiddleware --- tests/test_downloadermiddleware_httpproxy.py | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tests/test_downloadermiddleware_httpproxy.py b/tests/test_downloadermiddleware_httpproxy.py index 17be875c1..537126613 100644 --- a/tests/test_downloadermiddleware_httpproxy.py +++ b/tests/test_downloadermiddleware_httpproxy.py @@ -13,7 +13,7 @@ from scrapy.settings import Settings spider = Spider('foo') -class TestDefaultHeadersMiddleware(TestCase): +class TestHttpProxyMiddleware(TestCase): failureException = AssertionError From 9ad3af9d88bcefa18394c1cb2c833902ac20c533 Mon Sep 17 00:00:00 2001 From: Grammy Jiang <719388+grammy-jiang@users.noreply.github.com> Date: Sat, 23 Jun 2018 17:31:54 +0800 Subject: [PATCH 031/889] Update requirements.txt make the version of ipython less than 6.0 in python 2.7 --- tests/requirements.txt | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tests/requirements.txt b/tests/requirements.txt index c1576a2e7..790f29d34 100644 --- a/tests/requirements.txt +++ b/tests/requirements.txt @@ -10,4 +10,4 @@ brotlipy testfixtures # optional for shell wrapper tests bpython -ipython +ipython<6.0 From 4740dca8f260bef83eed849b692b3a2c1aaec6cf Mon Sep 17 00:00:00 2001 From: Eugenio Lacuesta Date: Sun, 24 Jun 2018 20:59:18 -0300 Subject: [PATCH 032/889] Deferred-like process_output/process_exception chain --- scrapy/core/spidermw.py | 58 +++++++++++++++++++++++++---------------- 1 file changed, 36 insertions(+), 22 deletions(-) diff --git a/scrapy/core/spidermw.py b/scrapy/core/spidermw.py index 50677670b..98e264bd3 100644 --- a/scrapy/core/spidermw.py +++ b/scrapy/core/spidermw.py @@ -17,6 +17,11 @@ class SpiderMiddlewareManager(MiddlewareManager): component_name = 'spider middleware' + # List of dicts. Each dict represents a spider middleware and contains the + # 'process_spider_output', 'process_spider_exception' methods. + # The idea is to simulate the behaviour of a Twisted deferred's callback/errback chain + output_methods = [] + @classmethod def _get_mwlist_from_settings(cls, settings): return build_component_list(settings.getwithbase('SPIDER_MIDDLEWARES')) @@ -25,12 +30,12 @@ class SpiderMiddlewareManager(MiddlewareManager): super(SpiderMiddlewareManager, self)._add_middleware(mw) if hasattr(mw, 'process_spider_input'): self.methods['process_spider_input'].append(mw.process_spider_input) - if hasattr(mw, 'process_spider_output'): - self.methods['process_spider_output'].insert(0, mw.process_spider_output) - if hasattr(mw, 'process_spider_exception'): - self.methods['process_spider_exception'].insert(0, mw.process_spider_exception) if hasattr(mw, 'process_start_requests'): self.methods['process_start_requests'].insert(0, mw.process_start_requests) + self.output_methods.insert(0, dict( + process_spider_output=getattr(mw, 'process_spider_output', None), + process_spider_exception=getattr(mw, 'process_spider_exception', None), + )) def scrape_response(self, scrape_func, response, request, spider): fname = lambda f:'%s.%s' % ( @@ -48,45 +53,54 @@ class SpiderMiddlewareManager(MiddlewareManager): return scrape_func(Failure(), request, spider) return scrape_func(response, request, spider) - def process_spider_exception(_failure): + def process_spider_exception(_failure, mw_index): exception = _failure.value # don't handle _InvalidOutput exception if isinstance(exception, _InvalidOutput): return _failure - for method in self.methods['process_spider_exception']: - result = method(response=response, exception=exception, spider=spider) - if result is not None and not _isiterable(result): - raise _InvalidOutput('Middleware {} must return None or an iterable ' \ - 'object, got {}'.format(fname(method), type(result))) - # stop exception handling by handing control over to the - # process_spider_output chain if an iterable has been returned - if result is not None: - return result + for index, mw in enumerate(self.output_methods): + if index < mw_index or mw['process_spider_exception'] is None: + continue + result = mw['process_spider_exception'](response=response, exception=exception, spider=spider) + mw_index += 1 + if _isiterable(result): + # stop exception handling by handing control over to the + # process_spider_output chain if an iterable has been returned + return process_spider_output(result, mw_index) + elif result is None: + continue + else: + raise _InvalidOutput('Middleware {} must return None or an iterable, got {}' \ + .format(fname(mw['process_spider_exception']), type(result))) return _failure - def process_spider_output(result): + def process_spider_output(result, mw_index): def wrapper(result_iterable): try: for r in result_iterable: yield r except Exception as ex: - exception_result = process_spider_exception(Failure(ex)) + # process the exception with the method from the next middleware + exception_result = process_spider_exception(Failure(ex), mw_index) if exception_result is None or isinstance(exception_result, Failure): raise for output in exception_result: yield output - for method in self.methods['process_spider_output']: - result = method(response=response, result=result, spider=spider) + for index, mw in enumerate(self.output_methods): + if index < mw_index or mw['process_spider_output'] is None: + continue + result = mw['process_spider_output'](response=response, result=result, spider=spider) + mw_index += 1 if _isiterable(result): result = wrapper(result) else: - raise _InvalidOutput('Middleware {} must return an iterable object, ' \ - 'got {}'.format(fname(method), type(result))) + raise _InvalidOutput('Middleware {} must return an iterable, got {}' \ + .format(fname(mw['process_spider_output']), type(result))) return result dfd = mustbe_deferred(process_spider_input, response) - dfd.addErrback(process_spider_exception) - dfd.addCallback(process_spider_output) + dfd.addErrback(process_spider_exception, mw_index=0) + dfd.addCallback(process_spider_output, mw_index=0) return dfd def process_start_requests(self, start_requests, spider): From ba294351381c0dd81476603246d2cea6c31486be Mon Sep 17 00:00:00 2001 From: Eugenio Lacuesta Date: Mon, 25 Jun 2018 15:01:12 -0300 Subject: [PATCH 033/889] Default values for OffsiteMiddleware For some reason test_crawl.py seems to be skipping the spider_opened method, which initializes the host_regex instance variable --- scrapy/spidermiddlewares/offsite.py | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) diff --git a/scrapy/spidermiddlewares/offsite.py b/scrapy/spidermiddlewares/offsite.py index 310166cad..3b7f194e4 100644 --- a/scrapy/spidermiddlewares/offsite.py +++ b/scrapy/spidermiddlewares/offsite.py @@ -19,6 +19,9 @@ class OffsiteMiddleware(object): def __init__(self, stats): self.stats = stats + # default values + self.host_regex = re.compile('') # allow all by default + self.domains_seen = set() @classmethod def from_crawler(cls, crawler): @@ -52,7 +55,7 @@ class OffsiteMiddleware(object): """Override this method to implement a different offsite policy""" allowed_domains = getattr(spider, 'allowed_domains', None) if not allowed_domains: - return re.compile('') # allow all by default + return url_pattern = re.compile("^https?://.*$") for domain in allowed_domains: if url_pattern.match(domain): @@ -62,8 +65,9 @@ class OffsiteMiddleware(object): return re.compile(regex) def spider_opened(self, spider): - self.host_regex = self.get_host_regex(spider) - self.domains_seen = set() + host_regex = self.get_host_regex(spider) + if host_regex: + self.host_regex = host_regex class URLWarning(Warning): From fac1b2f3516f3db6ce669664943336c08d95d0aa Mon Sep 17 00:00:00 2001 From: Mikhail Korobov Date: Wed, 27 Jun 2018 03:23:47 +0500 Subject: [PATCH 034/889] TST remove workaround for old Pillow versions which don't support BytesIO --- tests/test_pipeline_images.py | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/tests/test_pipeline_images.py b/tests/test_pipeline_images.py index 03c6d8059..a7c652959 100644 --- a/tests/test_pipeline_images.py +++ b/tests/test_pipeline_images.py @@ -1,8 +1,8 @@ -import os +import io import hashlib import random import warnings -from tempfile import mkdtemp, TemporaryFile +from tempfile import mkdtemp from shutil import rmtree from twisted.trial import unittest @@ -401,8 +401,9 @@ class ImagesPipelineTestCaseCustomSettings(unittest.TestCase): self.assertEqual(getattr(pipeline_cls, pipe_attr.lower()), expected_value) + def _create_image(format, *a, **kw): - buf = TemporaryFile() + buf = io.BytesIO() Image.new(*a, **kw).save(buf, format) buf.seek(0) return Image.open(buf) From 45f67eb64d54f2ac9fcd69233d7bddbdcec88a37 Mon Sep 17 00:00:00 2001 From: Mikhail Korobov Date: Wed, 27 Jun 2018 14:51:01 +0500 Subject: [PATCH 035/889] TST exclude lxml==4.2.2 from tests, as it doesn't play well with Pillow --- tests/constraints.txt | 1 + tox.ini | 1 + 2 files changed, 2 insertions(+) diff --git a/tests/constraints.txt b/tests/constraints.txt index 3bc30de15..e59e68b3f 100644 --- a/tests/constraints.txt +++ b/tests/constraints.txt @@ -1 +1,2 @@ Twisted!=18.4.0 +lxml!=4.2.2 \ No newline at end of file diff --git a/tox.ini b/tox.ini index c2fa9af28..82348eb24 100644 --- a/tox.ini +++ b/tox.ini @@ -67,6 +67,7 @@ commands = [testenv:py34] basepython = python3.4 deps = + -ctests/constraints.txt -rrequirements-py3.txt # Extras Pillow From 8782901fc865ca6f505bcd1a7d17314076507028 Mon Sep 17 00:00:00 2001 From: Mikhail Korobov Date: Thu, 28 Jun 2018 01:11:15 +0500 Subject: [PATCH 036/889] [MRG+1] TST test agains latest pypy (#3309) pypy3 is not upgraded, as tests segfault with pypy3 6.0 for some reason --- .travis.yml | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/.travis.yml b/.travis.yml index 6635f5d3b..065f23805 100644 --- a/.travis.yml +++ b/.travis.yml @@ -26,7 +26,7 @@ matrix: install: - | if [ "$TOXENV" = "pypy" ]; then - export PYPY_VERSION="pypy-5.9-linux_x86_64-portable" + export PYPY_VERSION="pypy-6.0.0-linux_x86_64-portable" wget "https://bitbucket.org/squeaky/portable-pypy/downloads/${PYPY_VERSION}.tar.bz2" tar -jxf ${PYPY_VERSION}.tar.bz2 virtualenv --python="$PYPY_VERSION/bin/pypy" "$HOME/virtualenvs/$PYPY_VERSION" From f11d65f7d66cf2d8560c707c4bb2b76079d45e5f Mon Sep 17 00:00:00 2001 From: Mikhail Korobov Date: Fri, 29 Jun 2018 18:34:11 +0500 Subject: [PATCH 037/889] TST make it clear which requirements are Python 2-only * rename requirements.txt to requirements-py2.txt, to make it clear they are Python 2-only * make requirements-py3.txt consistent with requirements-py2.txt --- requirements.txt => requirements-py2.txt | 4 ++-- requirements-py3.txt | 3 +++ tests/{requirements.txt => requirements-py2.txt} | 0 tox.ini | 8 ++++---- 4 files changed, 9 insertions(+), 6 deletions(-) rename requirements.txt => requirements-py2.txt (100%) rename tests/{requirements.txt => requirements-py2.txt} (100%) diff --git a/requirements.txt b/requirements-py2.txt similarity index 100% rename from requirements.txt rename to requirements-py2.txt index 2a94d742d..03b33d02d 100644 --- a/requirements.txt +++ b/requirements-py2.txt @@ -2,9 +2,9 @@ Twisted>=13.1.0 lxml pyOpenSSL cssselect>=0.9 -w3lib>=1.17.0 queuelib +w3lib>=1.17.0 six>=1.5.2 PyDispatcher>=2.0.5 -service_identity parsel>=1.4 +service_identity diff --git a/requirements-py3.txt b/requirements-py3.txt index 2aae3ae65..d76d9412f 100644 --- a/requirements-py3.txt +++ b/requirements-py3.txt @@ -4,4 +4,7 @@ pyOpenSSL>=0.13.1 cssselect>=0.9 queuelib>=1.1.1 w3lib>=1.17.0 +six>=1.5.2 +PyDispatcher>=2.0.5 +parsel>=1.4 service_identity diff --git a/tests/requirements.txt b/tests/requirements-py2.txt similarity index 100% rename from tests/requirements.txt rename to tests/requirements-py2.txt diff --git a/tox.ini b/tox.ini index 82348eb24..ee40983de 100644 --- a/tox.ini +++ b/tox.ini @@ -9,13 +9,13 @@ envlist = py27 [testenv] deps = -ctests/constraints.txt - -rrequirements.txt + -rrequirements-py2.txt # Extras botocore google-cloud-storage Pillow != 3.0.0 leveldb - -rtests/requirements.txt + -rtests/requirements-py2.txt passenv = S3_TEST_FILE_URI AWS_ACCESS_KEY_ID @@ -35,7 +35,7 @@ deps = Pillow==2.3.0 cssselect==0.9.1 zope.interface==4.0.5 - -rtests/requirements.txt + -rtests/requirements-py2.txt [testenv:jessie] # https://packages.debian.org/en/jessie/python/ @@ -50,7 +50,7 @@ deps = Pillow==2.6.1 cssselect==0.9.1 zope.interface==4.1.1 - -rtests/requirements.txt + -rtests/requirements-py2.txt [testenv:trunk] basepython = python2.7 From df75a0942e004f9645182a0260769f4337f843e5 Mon Sep 17 00:00:00 2001 From: Eugenio Lacuesta Date: Sun, 1 Jul 2018 13:30:50 -0300 Subject: [PATCH 038/889] Update docs --- docs/topics/spider-middleware.rst | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) diff --git a/docs/topics/spider-middleware.rst b/docs/topics/spider-middleware.rst index 0af26be73..dde1786af 100644 --- a/docs/topics/spider-middleware.rst +++ b/docs/topics/spider-middleware.rst @@ -112,9 +112,8 @@ following methods: .. method:: process_spider_exception(response, exception, spider) - This method is called when when a spider or :meth:`process_spider_input`/ - :meth:`process_spider_output` method (from other spider middleware) - raises an exception. + This method is called when a spider or :meth:`process_spider_output` + method (from a previous spider middleware) raises an exception. :meth:`process_spider_exception` should return either ``None`` or an iterable of :class:`~scrapy.http.Request`, dict or @@ -126,7 +125,7 @@ following methods: exception reaches the engine (where it's logged and discarded). If it returns an iterable the :meth:`process_spider_output` pipeline - kicks in, starting with the last non-executed method, and no other + kicks in, starting from the next spider middleware, and no other :meth:`process_spider_exception` will be called. :param response: the response being processed when the exception was From 735de8167d3e6b0085710d406c8c2976913baa43 Mon Sep 17 00:00:00 2001 From: Eugenio Lacuesta Date: Sat, 30 Jun 2018 20:55:17 -0300 Subject: [PATCH 039/889] Test for exceptions on process_spider_input --- tests/test_spider_mw.py | 77 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 77 insertions(+) create mode 100644 tests/test_spider_mw.py diff --git a/tests/test_spider_mw.py b/tests/test_spider_mw.py new file mode 100644 index 000000000..4a431d379 --- /dev/null +++ b/tests/test_spider_mw.py @@ -0,0 +1,77 @@ + +import logging + +from testfixtures import LogCapture +from twisted.trial.unittest import TestCase +from twisted.internet import defer + +from scrapy import Spider, Request +from scrapy.utils.test import get_crawler +from tests.mockserver import MockServer + + +class CommonTestCase(TestCase): + @classmethod + def setUpClass(cls): + cls.mockserver = MockServer() + cls.mockserver.__enter__() + + @classmethod + def tearDownClass(cls): + cls.mockserver.__exit__(None, None, None) + + @defer.inlineCallbacks + def crawl_log(self, spider): + crawler = get_crawler(spider) + with LogCapture() as log: + yield crawler.crawl() + raise defer.returnValue(log) + + +class LogExceptionMiddleware(object): + def process_spider_exception(self, response, exception, spider): + logging.warn('Middleware: %s exception caught', exception.__class__.__name__) + return None + + +# ================================================================================ +# (1) exceptions from a spider middleware's process_spider_input method +class ProcessSpiderInputSpider(Spider): + name = 'ProcessSpiderInputSpider' + custom_settings = { + 'SPIDER_MIDDLEWARES': { + # spider + __name__ + '.LogExceptionMiddleware': 10, + __name__ + '.FailProcessSpiderInputMiddleware': 8, + __name__ + '.LogExceptionMiddleware': 6, + # engine + } + } + + def start_requests(self): + yield Request('http://localhost:8998', callback=self.parse, errback=self.errback) + + def parse(self, response): + return [{'test': 1}, {'test': 2}] + + def errback(self, failure): + self.logger.warn('Got a Failure on the Request errback') + + +class FailProcessSpiderInputMiddleware: + def process_spider_input(self, response, spider): + logging.warn('Middleware: will raise ZeroDivisionError') + raise ZeroDivisionError() + + +class TestProcessSpiderInputSpider(CommonTestCase): + @defer.inlineCallbacks + def test_process_spider_input_errback(self): + """ + (1) An exception from the process_spider_input chain should not be caught by the + process_spider_exception chain, it should go directly to the Request errback + """ + log = yield self.crawl_log(ProcessSpiderInputSpider) + self.assertNotIn('Middleware: ZeroDivisionError exception caught', str(log)) + self.assertIn('Middleware: will raise ZeroDivisionError', str(log)) + self.assertIn('Got a Failure on the Request errback', str(log)) From 6ed9440ed528ab5c5eece50512e19929e4320b42 Mon Sep 17 00:00:00 2001 From: Eugenio Lacuesta Date: Sat, 30 Jun 2018 21:27:10 -0300 Subject: [PATCH 040/889] Tests for exceptions on spider callbacks --- tests/test_spider_mw.py | 72 +++++++++++++++++++++++++++++++++++++---- 1 file changed, 66 insertions(+), 6 deletions(-) diff --git a/tests/test_spider_mw.py b/tests/test_spider_mw.py index 4a431d379..092546291 100644 --- a/tests/test_spider_mw.py +++ b/tests/test_spider_mw.py @@ -60,11 +60,11 @@ class ProcessSpiderInputSpider(Spider): class FailProcessSpiderInputMiddleware: def process_spider_input(self, response, spider): - logging.warn('Middleware: will raise ZeroDivisionError') - raise ZeroDivisionError() + logging.warn('Middleware: will raise IndexError') + raise IndexError() -class TestProcessSpiderInputSpider(CommonTestCase): +class TestProcessSpiderInput(CommonTestCase): @defer.inlineCallbacks def test_process_spider_input_errback(self): """ @@ -72,6 +72,66 @@ class TestProcessSpiderInputSpider(CommonTestCase): process_spider_exception chain, it should go directly to the Request errback """ log = yield self.crawl_log(ProcessSpiderInputSpider) - self.assertNotIn('Middleware: ZeroDivisionError exception caught', str(log)) - self.assertIn('Middleware: will raise ZeroDivisionError', str(log)) - self.assertIn('Got a Failure on the Request errback', str(log)) + self.assertNotIn("Middleware: IndexError exception caught", str(log)) + self.assertIn("Middleware: will raise IndexError", str(log)) + self.assertIn("Got a Failure on the Request errback", str(log)) + + +# ================================================================================ +# (2) exceptions from a spider callback (generator) +class GeneratorCallbackSpider(Spider): + name = 'GeneratorCallbackSpider' + start_urls = ['http://localhost:8998'] + custom_settings = { + 'SPIDER_MIDDLEWARES': { + # spider + __name__ + '.LogExceptionMiddleware': 10, + # engine + }, + } + + def parse(self, response): + yield {'test': 1} + yield {'test': 2} + raise ImportError() + + +class TestGeneratorCallback(CommonTestCase): + @defer.inlineCallbacks + def test_generator_callback(self): + """ + (2) An exception from a spider's callback should + be caught by the process_spider_exception chain + """ + log = yield self.crawl_log(GeneratorCallbackSpider) + self.assertIn("Middleware: ImportError exception caught", str(log)) + self.assertIn("'item_scraped_count': 2", str(log)) + + +# ================================================================================ +# (3) exceptions from a spider callback (not a generator) +class NotAGeneratorCallbackSpider(Spider): + name = 'NotAGeneratorCallbackSpider' + start_urls = ['http://localhost:8998'] + custom_settings = { + 'SPIDER_MIDDLEWARES': { + # spider + __name__ + '.LogExceptionMiddleware': 10, + # engine + }, + } + + def parse(self, response): + return [{'test': 1}, {'test': 1/0}] + + +class TestNotAGeneratorCallback(CommonTestCase): + @defer.inlineCallbacks + def test_not_a_generator_callback(self): + """ + (3) An exception from a spider's callback should + be caught by the process_spider_exception chain + """ + log = yield self.crawl_log(NotAGeneratorCallbackSpider) + self.assertIn("Middleware: ZeroDivisionError exception caught", str(log)) + self.assertNotIn("item_scraped_count", str(log)) From 4fca9aba851133fcdc12bb46c7ae229d9537079a Mon Sep 17 00:00:00 2001 From: Eugenio Lacuesta Date: Sun, 1 Jul 2018 13:18:29 -0300 Subject: [PATCH 041/889] Recover from a callback exception --- tests/test_spider_mw.py | 137 +++++++++++++++++++++++++--------------- 1 file changed, 85 insertions(+), 52 deletions(-) diff --git a/tests/test_spider_mw.py b/tests/test_spider_mw.py index 092546291..49a60d08b 100644 --- a/tests/test_spider_mw.py +++ b/tests/test_spider_mw.py @@ -10,22 +10,8 @@ from scrapy.utils.test import get_crawler from tests.mockserver import MockServer -class CommonTestCase(TestCase): - @classmethod - def setUpClass(cls): - cls.mockserver = MockServer() - cls.mockserver.__enter__() - - @classmethod - def tearDownClass(cls): - cls.mockserver.__exit__(None, None, None) - - @defer.inlineCallbacks - def crawl_log(self, spider): - crawler = get_crawler(spider) - with LogCapture() as log: - yield crawler.crawl() - raise defer.returnValue(log) +# TEST_URL = 'http://example.org' +TEST_URL = 'http://localhost:8998' class LogExceptionMiddleware(object): @@ -34,6 +20,32 @@ class LogExceptionMiddleware(object): return None +# ================================================================================ +# recover from an exception on a spider callback +class RecoverySpider(Spider): + name = 'RecoverySpider' + start_urls = [TEST_URL] + custom_settings = { + 'SPIDER_MIDDLEWARES': { + __name__ + '.RecoveryMiddleware': 10, + }, + } + + def parse(self, response): + yield {'test': 1} + self.logger.warn('DONT_FAIL: %s', response.meta.get('dont_fail')) + if not response.meta.get('dont_fail'): + raise ModuleNotFoundError() + +class RecoveryMiddleware(object): + def process_spider_exception(self, response, exception, spider): + logging.warn('Middleware: %s exception caught', exception.__class__.__name__) + return [ + {'from': 'process_spider_exception'}, + Request(response.url, meta={'dont_fail': True}, dont_filter=True), + ] + + # ================================================================================ # (1) exceptions from a spider middleware's process_spider_input method class ProcessSpiderInputSpider(Spider): @@ -49,7 +61,7 @@ class ProcessSpiderInputSpider(Spider): } def start_requests(self): - yield Request('http://localhost:8998', callback=self.parse, errback=self.errback) + yield Request(TEST_URL, callback=self.parse, errback=self.errback) def parse(self, response): return [{'test': 1}, {'test': 2}] @@ -64,29 +76,14 @@ class FailProcessSpiderInputMiddleware: raise IndexError() -class TestProcessSpiderInput(CommonTestCase): - @defer.inlineCallbacks - def test_process_spider_input_errback(self): - """ - (1) An exception from the process_spider_input chain should not be caught by the - process_spider_exception chain, it should go directly to the Request errback - """ - log = yield self.crawl_log(ProcessSpiderInputSpider) - self.assertNotIn("Middleware: IndexError exception caught", str(log)) - self.assertIn("Middleware: will raise IndexError", str(log)) - self.assertIn("Got a Failure on the Request errback", str(log)) - - # ================================================================================ # (2) exceptions from a spider callback (generator) class GeneratorCallbackSpider(Spider): name = 'GeneratorCallbackSpider' - start_urls = ['http://localhost:8998'] + start_urls = [TEST_URL] custom_settings = { 'SPIDER_MIDDLEWARES': { - # spider __name__ + '.LogExceptionMiddleware': 10, - # engine }, } @@ -96,28 +93,14 @@ class GeneratorCallbackSpider(Spider): raise ImportError() -class TestGeneratorCallback(CommonTestCase): - @defer.inlineCallbacks - def test_generator_callback(self): - """ - (2) An exception from a spider's callback should - be caught by the process_spider_exception chain - """ - log = yield self.crawl_log(GeneratorCallbackSpider) - self.assertIn("Middleware: ImportError exception caught", str(log)) - self.assertIn("'item_scraped_count': 2", str(log)) - - # ================================================================================ # (3) exceptions from a spider callback (not a generator) class NotAGeneratorCallbackSpider(Spider): name = 'NotAGeneratorCallbackSpider' - start_urls = ['http://localhost:8998'] + start_urls = [TEST_URL] custom_settings = { 'SPIDER_MIDDLEWARES': { - # spider __name__ + '.LogExceptionMiddleware': 10, - # engine }, } @@ -125,13 +108,63 @@ class NotAGeneratorCallbackSpider(Spider): return [{'test': 1}, {'test': 1/0}] -class TestNotAGeneratorCallback(CommonTestCase): +# ================================================================================ +class TestSpiderMiddleware(TestCase): + @classmethod + def setUpClass(cls): + cls.mockserver = MockServer() + cls.mockserver.__enter__() + + @classmethod + def tearDownClass(cls): + cls.mockserver.__exit__(None, None, None) + + @defer.inlineCallbacks + def crawl_log(self, spider): + crawler = get_crawler(spider) + with LogCapture() as log: + yield crawler.crawl() + raise defer.returnValue(log) + + # @defer.inlineCallbacks + # def test_recovery(self): + # """ + # Recover from an exception from a spider's callback. The final item count should be 3 + # (one from the spider before raising the exception, one from the middleware and one + # from the spider when processing the response that was enqueued from the middleware) + # """ + # log = yield self.crawl_log(RecoverySpider) + # self.assertIn("Middleware: ModuleNotFoundError exception caught", str(log)) + # self.assertEqual(str(log).count("Middleware: ModuleNotFoundError exception caught"), 1) + # self.assertIn("'item_scraped_count': 3", str(log)) + + @defer.inlineCallbacks + def test_process_spider_input_errback(self): + """ + (1) An exception from the process_spider_input chain should not be caught by the + process_spider_exception chain, it should go directly to the Request errback + """ + log1 = yield self.crawl_log(ProcessSpiderInputSpider) + self.assertNotIn("Middleware: IndexError exception caught", str(log1)) + self.assertIn("Middleware: will raise IndexError", str(log1)) + self.assertIn("Got a Failure on the Request errback", str(log1)) + + @defer.inlineCallbacks + def test_generator_callback(self): + """ + (2) An exception from a spider's callback should + be caught by the process_spider_exception chain + """ + log2 = yield self.crawl_log(GeneratorCallbackSpider) + self.assertIn("Middleware: ImportError exception caught", str(log2)) + self.assertIn("'item_scraped_count': 2", str(log2)) + @defer.inlineCallbacks def test_not_a_generator_callback(self): """ (3) An exception from a spider's callback should be caught by the process_spider_exception chain """ - log = yield self.crawl_log(NotAGeneratorCallbackSpider) - self.assertIn("Middleware: ZeroDivisionError exception caught", str(log)) - self.assertNotIn("item_scraped_count", str(log)) + log3 = yield self.crawl_log(NotAGeneratorCallbackSpider) + self.assertIn("Middleware: ZeroDivisionError exception caught", str(log3)) + self.assertNotIn("item_scraped_count", str(log3)) From 985ab636cfa0825f100b02583bcfd106d1f4cef6 Mon Sep 17 00:00:00 2001 From: Eugenio Lacuesta Date: Sun, 1 Jul 2018 17:49:30 -0300 Subject: [PATCH 042/889] Store output methods on the 'methods' dict --- scrapy/core/spidermw.py | 43 +++++++++++++++++------------------------ 1 file changed, 18 insertions(+), 25 deletions(-) diff --git a/scrapy/core/spidermw.py b/scrapy/core/spidermw.py index 98e264bd3..c9dd8c91e 100644 --- a/scrapy/core/spidermw.py +++ b/scrapy/core/spidermw.py @@ -17,11 +17,6 @@ class SpiderMiddlewareManager(MiddlewareManager): component_name = 'spider middleware' - # List of dicts. Each dict represents a spider middleware and contains the - # 'process_spider_output', 'process_spider_exception' methods. - # The idea is to simulate the behaviour of a Twisted deferred's callback/errback chain - output_methods = [] - @classmethod def _get_mwlist_from_settings(cls, settings): return build_component_list(settings.getwithbase('SPIDER_MIDDLEWARES')) @@ -32,10 +27,8 @@ class SpiderMiddlewareManager(MiddlewareManager): self.methods['process_spider_input'].append(mw.process_spider_input) if hasattr(mw, 'process_start_requests'): self.methods['process_start_requests'].insert(0, mw.process_start_requests) - self.output_methods.insert(0, dict( - process_spider_output=getattr(mw, 'process_spider_output', None), - process_spider_exception=getattr(mw, 'process_spider_exception', None), - )) + self.methods['process_spider_output'].insert(0, getattr(mw, 'process_spider_output', None)) + self.methods['process_spider_exception'].insert(0, getattr(mw, 'process_spider_exception', None)) def scrape_response(self, scrape_func, response, request, spider): fname = lambda f:'%s.%s' % ( @@ -53,54 +46,54 @@ class SpiderMiddlewareManager(MiddlewareManager): return scrape_func(Failure(), request, spider) return scrape_func(response, request, spider) - def process_spider_exception(_failure, mw_index): + def process_spider_exception(_failure, index): exception = _failure.value # don't handle _InvalidOutput exception if isinstance(exception, _InvalidOutput): return _failure - for index, mw in enumerate(self.output_methods): - if index < mw_index or mw['process_spider_exception'] is None: + for i, method in enumerate(self.methods['process_spider_exception']): + if i < index or method is None: continue - result = mw['process_spider_exception'](response=response, exception=exception, spider=spider) - mw_index += 1 + result = method(response=response, exception=exception, spider=spider) + index += 1 if _isiterable(result): # stop exception handling by handing control over to the # process_spider_output chain if an iterable has been returned - return process_spider_output(result, mw_index) + return process_spider_output(result, index) elif result is None: continue else: raise _InvalidOutput('Middleware {} must return None or an iterable, got {}' \ - .format(fname(mw['process_spider_exception']), type(result))) + .format(fname(method), type(result))) return _failure - def process_spider_output(result, mw_index): + def process_spider_output(result, index): def wrapper(result_iterable): try: for r in result_iterable: yield r except Exception as ex: # process the exception with the method from the next middleware - exception_result = process_spider_exception(Failure(ex), mw_index) + exception_result = process_spider_exception(Failure(ex), index) if exception_result is None or isinstance(exception_result, Failure): raise for output in exception_result: yield output - for index, mw in enumerate(self.output_methods): - if index < mw_index or mw['process_spider_output'] is None: + for i, method in enumerate(self.methods['process_spider_output']): + if i < index or method is None: continue - result = mw['process_spider_output'](response=response, result=result, spider=spider) - mw_index += 1 + result = method(response=response, result=result, spider=spider) + index += 1 if _isiterable(result): result = wrapper(result) else: raise _InvalidOutput('Middleware {} must return an iterable, got {}' \ - .format(fname(mw['process_spider_output']), type(result))) + .format(fname(method), type(result))) return result dfd = mustbe_deferred(process_spider_input, response) - dfd.addErrback(process_spider_exception, mw_index=0) - dfd.addCallback(process_spider_output, mw_index=0) + dfd.addErrback(process_spider_exception, index=0) + dfd.addCallback(process_spider_output, index=0) return dfd def process_start_requests(self, start_requests, spider): From d05c8677c5079b88db4405fe2bed83dc437c9204 Mon Sep 17 00:00:00 2001 From: Grammy Jiang <719388+grammy-jiang@users.noreply.github.com> Date: Wed, 4 Jul 2018 02:58:43 +0800 Subject: [PATCH 043/889] [MRG+1] change the bad smell code (#3304) Change the bad smell code --- scrapy/downloadermiddlewares/httpproxy.py | 9 ++++----- 1 file changed, 4 insertions(+), 5 deletions(-) diff --git a/scrapy/downloadermiddlewares/httpproxy.py b/scrapy/downloadermiddlewares/httpproxy.py index 0d5320bf8..1dd47359f 100644 --- a/scrapy/downloadermiddlewares/httpproxy.py +++ b/scrapy/downloadermiddlewares/httpproxy.py @@ -1,14 +1,13 @@ import base64 +from six.moves.urllib.parse import unquote, urlunparse from six.moves.urllib.request import getproxies, proxy_bypass -from six.moves.urllib.parse import unquote try: from urllib2 import _parse_proxy except ImportError: from urllib.request import _parse_proxy -from six.moves.urllib.parse import urlunparse -from scrapy.utils.httpobj import urlparse_cached from scrapy.exceptions import NotConfigured +from scrapy.utils.httpobj import urlparse_cached from scrapy.utils.python import to_bytes @@ -17,8 +16,8 @@ class HttpProxyMiddleware(object): def __init__(self, auth_encoding='latin-1'): self.auth_encoding = auth_encoding self.proxies = {} - for type, url in getproxies().items(): - self.proxies[type] = self._get_proxy(url, type) + for type_, url in getproxies().items(): + self.proxies[type_] = self._get_proxy(url, type_) @classmethod def from_crawler(cls, crawler): From 74ce1561542dac9be5d1363a4a3e623653855e05 Mon Sep 17 00:00:00 2001 From: chainly <1258626769@qq.com> Date: Wed, 4 Jul 2018 03:00:59 +0800 Subject: [PATCH 044/889] add item_error to be catchable (#3256) --- docs/topics/signals.rst | 23 +++++++++++++++++++++++ scrapy/core/scraper.py | 3 +++ scrapy/signals.py | 1 + tests/pipelines.py | 6 ++++++ tests/test_engine.py | 31 +++++++++++++++++++++++++++++++ 5 files changed, 64 insertions(+) diff --git a/docs/topics/signals.rst b/docs/topics/signals.rst index cf1588df8..d40c0e1df 100644 --- a/docs/topics/signals.rst +++ b/docs/topics/signals.rst @@ -135,6 +135,29 @@ item_dropped to be dropped :type exception: :exc:`~scrapy.exceptions.DropItem` exception +item_error +------------ + +.. signal:: item_error +.. function:: item_error(item, response, spider, failure) + + Sent when a :ref:`topics-item-pipeline` generates an error (ie. raises + an exception), except :exc:`~scrapy.exceptions.DropItem` exception. + + This signal supports returning deferreds from their handlers. + + :param item: the item dropped from the :ref:`topics-item-pipeline` + :type item: dict or :class:`~scrapy.item.Item` object + + :param response: the response being processed when the exception was raised + :type response: :class:`~scrapy.http.Response` object + + :param spider: the spider which raised the exception + :type spider: :class:`~scrapy.spiders.Spider` object + + :param failure: the exception raised as a Twisted `Failure`_ object + :type failure: `Failure`_ object + spider_closed ------------- diff --git a/scrapy/core/scraper.py b/scrapy/core/scraper.py index c08e37367..ee1e95a0c 100644 --- a/scrapy/core/scraper.py +++ b/scrapy/core/scraper.py @@ -232,6 +232,9 @@ class Scraper(object): logger.error('Error processing %(item)s', {'item': item}, exc_info=failure_to_exc_info(output), extra={'spider': spider}) + return self.signals.send_catch_log_deferred( + signal=signals.item_error, item=item, response=response, + spider=spider, failure=output) else: logkws = self.logformatter.scraped(output, response, spider) logger.log(*logformatter_adapter(logkws), extra={'spider': spider}) diff --git a/scrapy/signals.py b/scrapy/signals.py index de0886fb6..e36c27203 100644 --- a/scrapy/signals.py +++ b/scrapy/signals.py @@ -17,6 +17,7 @@ response_received = object() response_downloaded = object() item_scraped = object() item_dropped = object() +item_error = object() # for backwards compatibility stats_spider_opened = spider_opened diff --git a/tests/pipelines.py b/tests/pipelines.py index ddfbc7a99..7e2895a5c 100644 --- a/tests/pipelines.py +++ b/tests/pipelines.py @@ -9,3 +9,9 @@ class ZeroDivisionErrorPipeline(object): def process_item(self, item, spider): return item + + +class ProcessWithZeroDivisionErrorPipiline(object): + + def process_item(self, item, spider): + 1/0 diff --git a/tests/test_engine.py b/tests/test_engine.py index 04113ddcf..719c0c60c 100644 --- a/tests/test_engine.py +++ b/tests/test_engine.py @@ -74,6 +74,14 @@ class DictItemsSpider(TestSpider): item_cls = dict +class ItemZeroDivisionErrorSpider(TestSpider): + custom_settings = { + "ITEM_PIPELINES": { + "tests.pipelines.ProcessWithZeroDivisionErrorPipiline": 300, + } + } + + def start_test_site(debug=False): root_dir = os.path.join(tests_datadir, "test_site") r = static.File(root_dir) @@ -95,6 +103,7 @@ class CrawlerRun(object): self.respplug = [] self.reqplug = [] self.reqdropped = [] + self.itemerror = [] self.itemresp = [] self.signals_catched = {} self.spider_class = spider_class @@ -112,6 +121,7 @@ class CrawlerRun(object): self.crawler = get_crawler(self.spider_class) self.crawler.signals.connect(self.item_scraped, signals.item_scraped) + self.crawler.signals.connect(self.item_error, signals.item_error) self.crawler.signals.connect(self.request_scheduled, signals.request_scheduled) self.crawler.signals.connect(self.request_dropped, signals.request_dropped) self.crawler.signals.connect(self.response_downloaded, signals.response_downloaded) @@ -136,6 +146,9 @@ class CrawlerRun(object): u = urlparse(url) return u.path + def item_error(self, item, response, spider, failure): + self.itemerror.append((item, response, spider, failure)) + def item_scraped(self, item, spider, response): self.itemresp.append((item, response)) @@ -175,6 +188,10 @@ class EngineTest(unittest.TestCase): self._assert_scheduled_requests(urls_to_visit=7) self._assert_dropped_requests() + self.run = CrawlerRun(ItemZeroDivisionErrorSpider) + yield self.run.run() + self._assert_items_error() + def _assert_visited_urls(self): must_be_visited = ["/", "/redirect", "/redirected", "/item1.html", "/item2.html", "/item999.html"] @@ -209,6 +226,20 @@ class EngineTest(unittest.TestCase): if self.run.getpath(response.url) == '/redirect': self.assertEqual(302, response.status) + def _assert_items_error(self): + self.assertEqual(2, len(self.run.itemerror)) + for item, response, spider, failure in self.run.itemerror: + self.assertEqual(failure.value.__class__, ZeroDivisionError) + self.assertEqual(spider, self.run.spider) + + self.assertEqual(item['url'], response.url) + if 'item1.html' in item['url']: + self.assertEqual('Item 1 name', item['name']) + self.assertEqual('100', item['price']) + if 'item2.html' in item['url']: + self.assertEqual('Item 2 name', item['name']) + self.assertEqual('200', item['price']) + def _assert_scraped_items(self): self.assertEqual(2, len(self.run.itemresp)) for item, response in self.run.itemresp: From 6f5c39d65f3e5d74c292f2143b4f84c7f43b155a Mon Sep 17 00:00:00 2001 From: Oz T Date: Wed, 4 Jul 2018 00:22:24 +0300 Subject: [PATCH 045/889] Fix for CSV export unnecessary blank lines problem on Windows (#3039) --- scrapy/exporters.py | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/scrapy/exporters.py b/scrapy/exporters.py index 07f43b494..695c74fec 100644 --- a/scrapy/exporters.py +++ b/scrapy/exporters.py @@ -214,7 +214,8 @@ class CsvItemExporter(BaseItemExporter): file, line_buffering=False, write_through=True, - encoding=self.encoding + encoding=self.encoding, + newline='' # Windows needs this https://github.com/scrapy/scrapy/issues/3034 ) if six.PY3 else file self.csv_writer = csv.writer(self.stream, **kwargs) self._headers_not_written = True From 0b2870634af6cc14191faafcba7d58a5f3cc3016 Mon Sep 17 00:00:00 2001 From: Eugenio Lacuesta Date: Wed, 4 Jul 2018 16:14:51 -0300 Subject: [PATCH 046/889] Do not inherit from object --- tests/test_spider_mw.py | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/tests/test_spider_mw.py b/tests/test_spider_mw.py index 49a60d08b..2565ef7af 100644 --- a/tests/test_spider_mw.py +++ b/tests/test_spider_mw.py @@ -14,7 +14,7 @@ from tests.mockserver import MockServer TEST_URL = 'http://localhost:8998' -class LogExceptionMiddleware(object): +class LogExceptionMiddleware: def process_spider_exception(self, response, exception, spider): logging.warn('Middleware: %s exception caught', exception.__class__.__name__) return None @@ -37,7 +37,7 @@ class RecoverySpider(Spider): if not response.meta.get('dont_fail'): raise ModuleNotFoundError() -class RecoveryMiddleware(object): +class RecoveryMiddleware: def process_spider_exception(self, response, exception, spider): logging.warn('Middleware: %s exception caught', exception.__class__.__name__) return [ From 0a0e62272e67aaebe29666017e9b0623b81bf369 Mon Sep 17 00:00:00 2001 From: Eugenio Lacuesta Date: Wed, 4 Jul 2018 16:19:19 -0300 Subject: [PATCH 047/889] New tests --- tests/test_spider_mw.py | 170 -------------- tests/test_spidermiddleware.py | 405 ++++++++++----------------------- 2 files changed, 118 insertions(+), 457 deletions(-) delete mode 100644 tests/test_spider_mw.py diff --git a/tests/test_spider_mw.py b/tests/test_spider_mw.py deleted file mode 100644 index 2565ef7af..000000000 --- a/tests/test_spider_mw.py +++ /dev/null @@ -1,170 +0,0 @@ - -import logging - -from testfixtures import LogCapture -from twisted.trial.unittest import TestCase -from twisted.internet import defer - -from scrapy import Spider, Request -from scrapy.utils.test import get_crawler -from tests.mockserver import MockServer - - -# TEST_URL = 'http://example.org' -TEST_URL = 'http://localhost:8998' - - -class LogExceptionMiddleware: - def process_spider_exception(self, response, exception, spider): - logging.warn('Middleware: %s exception caught', exception.__class__.__name__) - return None - - -# ================================================================================ -# recover from an exception on a spider callback -class RecoverySpider(Spider): - name = 'RecoverySpider' - start_urls = [TEST_URL] - custom_settings = { - 'SPIDER_MIDDLEWARES': { - __name__ + '.RecoveryMiddleware': 10, - }, - } - - def parse(self, response): - yield {'test': 1} - self.logger.warn('DONT_FAIL: %s', response.meta.get('dont_fail')) - if not response.meta.get('dont_fail'): - raise ModuleNotFoundError() - -class RecoveryMiddleware: - def process_spider_exception(self, response, exception, spider): - logging.warn('Middleware: %s exception caught', exception.__class__.__name__) - return [ - {'from': 'process_spider_exception'}, - Request(response.url, meta={'dont_fail': True}, dont_filter=True), - ] - - -# ================================================================================ -# (1) exceptions from a spider middleware's process_spider_input method -class ProcessSpiderInputSpider(Spider): - name = 'ProcessSpiderInputSpider' - custom_settings = { - 'SPIDER_MIDDLEWARES': { - # spider - __name__ + '.LogExceptionMiddleware': 10, - __name__ + '.FailProcessSpiderInputMiddleware': 8, - __name__ + '.LogExceptionMiddleware': 6, - # engine - } - } - - def start_requests(self): - yield Request(TEST_URL, callback=self.parse, errback=self.errback) - - def parse(self, response): - return [{'test': 1}, {'test': 2}] - - def errback(self, failure): - self.logger.warn('Got a Failure on the Request errback') - - -class FailProcessSpiderInputMiddleware: - def process_spider_input(self, response, spider): - logging.warn('Middleware: will raise IndexError') - raise IndexError() - - -# ================================================================================ -# (2) exceptions from a spider callback (generator) -class GeneratorCallbackSpider(Spider): - name = 'GeneratorCallbackSpider' - start_urls = [TEST_URL] - custom_settings = { - 'SPIDER_MIDDLEWARES': { - __name__ + '.LogExceptionMiddleware': 10, - }, - } - - def parse(self, response): - yield {'test': 1} - yield {'test': 2} - raise ImportError() - - -# ================================================================================ -# (3) exceptions from a spider callback (not a generator) -class NotAGeneratorCallbackSpider(Spider): - name = 'NotAGeneratorCallbackSpider' - start_urls = [TEST_URL] - custom_settings = { - 'SPIDER_MIDDLEWARES': { - __name__ + '.LogExceptionMiddleware': 10, - }, - } - - def parse(self, response): - return [{'test': 1}, {'test': 1/0}] - - -# ================================================================================ -class TestSpiderMiddleware(TestCase): - @classmethod - def setUpClass(cls): - cls.mockserver = MockServer() - cls.mockserver.__enter__() - - @classmethod - def tearDownClass(cls): - cls.mockserver.__exit__(None, None, None) - - @defer.inlineCallbacks - def crawl_log(self, spider): - crawler = get_crawler(spider) - with LogCapture() as log: - yield crawler.crawl() - raise defer.returnValue(log) - - # @defer.inlineCallbacks - # def test_recovery(self): - # """ - # Recover from an exception from a spider's callback. The final item count should be 3 - # (one from the spider before raising the exception, one from the middleware and one - # from the spider when processing the response that was enqueued from the middleware) - # """ - # log = yield self.crawl_log(RecoverySpider) - # self.assertIn("Middleware: ModuleNotFoundError exception caught", str(log)) - # self.assertEqual(str(log).count("Middleware: ModuleNotFoundError exception caught"), 1) - # self.assertIn("'item_scraped_count': 3", str(log)) - - @defer.inlineCallbacks - def test_process_spider_input_errback(self): - """ - (1) An exception from the process_spider_input chain should not be caught by the - process_spider_exception chain, it should go directly to the Request errback - """ - log1 = yield self.crawl_log(ProcessSpiderInputSpider) - self.assertNotIn("Middleware: IndexError exception caught", str(log1)) - self.assertIn("Middleware: will raise IndexError", str(log1)) - self.assertIn("Got a Failure on the Request errback", str(log1)) - - @defer.inlineCallbacks - def test_generator_callback(self): - """ - (2) An exception from a spider's callback should - be caught by the process_spider_exception chain - """ - log2 = yield self.crawl_log(GeneratorCallbackSpider) - self.assertIn("Middleware: ImportError exception caught", str(log2)) - self.assertIn("'item_scraped_count': 2", str(log2)) - - @defer.inlineCallbacks - def test_not_a_generator_callback(self): - """ - (3) An exception from a spider's callback should - be caught by the process_spider_exception chain - """ - log3 = yield self.crawl_log(NotAGeneratorCallbackSpider) - self.assertIn("Middleware: ZeroDivisionError exception caught", str(log3)) - self.assertNotIn("item_scraped_count", str(log3)) diff --git a/tests/test_spidermiddleware.py b/tests/test_spidermiddleware.py index 109bcc250..2565ef7af 100644 --- a/tests/test_spidermiddleware.py +++ b/tests/test_spidermiddleware.py @@ -5,256 +5,111 @@ from testfixtures import LogCapture from twisted.trial.unittest import TestCase from twisted.internet import defer -from scrapy.spiders import Spider -from scrapy.item import Item, Field -from scrapy.http import Request +from scrapy import Spider, Request from scrapy.utils.test import get_crawler from tests.mockserver import MockServer -class TestItem(Item): - value = Field() +# TEST_URL = 'http://example.org' +TEST_URL = 'http://localhost:8998' -class LocalhostSpider(Spider): - start_urls = ['http://localhost:8998'] # tests.mockserver.MockServer - - -# ================================================================================ -# exceptions from a spider's parse method -class BaseExceptionFromParseMethodSpider(LocalhostSpider): - custom_settings = { - 'SPIDER_MIDDLEWARES': {'tests.test_spidermiddleware.CatchExceptionMiddleware': 540} - } - - -class NotAGeneratorSpider(BaseExceptionFromParseMethodSpider): - """ return value is NOT a generator """ - name = 'not_a_generator' - - def parse(self, response): - raise AssertionError - - -class GeneratorErrorBeforeItemsSpider(BaseExceptionFromParseMethodSpider): - """ return value is a generator; the exception is raised - before the items are yielded: no items should be scraped """ - name = 'generator_error_before_items' - - def parse(self, response): - raise ValueError - for i in range(3): - yield {'value': i} - - -class GeneratorErrorAfterItemsSpider(BaseExceptionFromParseMethodSpider): - """ return value is a generator; the exception is raised - after the items are yielded: 3 items should be scraped """ - name = 'generator_error_after_items' - - def parse(self, response): - for i in range(3): - yield {'value': i} - raise FloatingPointError - - -class CatchExceptionMiddleware(object): +class LogExceptionMiddleware: def process_spider_exception(self, response, exception, spider): - """ catch an exception and log it """ - logging.warn('{} exception caught'.format(exception.__class__.__name__)) + logging.warn('Middleware: %s exception caught', exception.__class__.__name__) return None # ================================================================================ -# exception from a previous middleware's process_spider_input method -# process_spider_input is not expected to return an iterable, so there are no -# separate tests for generator/non-generator implementations -class FromPreviousMiddlewareInputSpider(LocalhostSpider): - name = 'not_a_generator_from_previous_middleware_input' +# recover from an exception on a spider callback +class RecoverySpider(Spider): + name = 'RecoverySpider' + start_urls = [TEST_URL] custom_settings = { 'SPIDER_MIDDLEWARES': { - # engine side - 'tests.test_spidermiddleware.CatchExceptionMiddleware': 540, - 'tests.test_spidermiddleware.RaiseExceptionOnInputMiddleware': 545, - # spider side - } - } - - def parse(self, response): - return None - - -class RaiseExceptionOnInputMiddleware(object): - def process_spider_input(self, response, spider): - raise LookupError - - -# ================================================================================ -# exception from a previous middleware's process_spider_output method (not a generator) -class NotAGeneratorFromPreviousMiddlewareOutputSpider(LocalhostSpider): - name = 'not_a_generator_from_previous_middleware_output' - custom_settings = { - 'SPIDER_MIDDLEWARES': { - # engine side - 'tests.test_spidermiddleware.CatchExceptionMiddleware': 540, - 'tests.test_spidermiddleware.RaiseExceptionOnOutputNotAGeneratorMiddleware': 545, - # spider side - } - } - - def parse(self, response): - return [{'value': i} for i in range(3)] - - -class RaiseExceptionOnOutputNotAGeneratorMiddleware(object): - def process_spider_output(self, response, result, spider): - raise UnicodeError - - -# ================================================================================ -# exception from a previous middleware's process_spider_output method (generator) -class GeneratorFromPreviousMiddlewareOutputSpider(LocalhostSpider): - name = 'generator_from_previous_middleware_output' - custom_settings = { - 'SPIDER_MIDDLEWARES': { - # engine side - 'tests.test_spidermiddleware.CatchExceptionMiddleware': 540, - 'tests.test_spidermiddleware.RaiseExceptionOnOutputGeneratorMiddleware': 545, - # spider side - } - } - - def parse(self, response): - return [{'value': i} for i in range(10, 13)] - - -class RaiseExceptionOnOutputGeneratorMiddleware(object): - def process_spider_output(self, response, result, spider): - for r in result: - yield r - raise NameError - - -# ================================================================================ -# do something useful from the exception handler -class DoSomethingSpider(LocalhostSpider): - name = 'do_something' - custom_settings = { - 'SPIDER_MIDDLEWARES': { - # engine side - 'tests.test_spidermiddleware.DoSomethingMiddleware': 540, - 'tests.test_spidermiddleware.CatchExceptionMiddleware': 545, - # spider side - } - } - - def parse(self, response): - yield {'value': response.url} - raise ImportError - - -class DoSomethingMiddleware(object): - def process_spider_exception(self, response, exception, spider): - return [Request('http://localhost:8998?processed=true'), {'value': 10}, TestItem(value='asdf')] - - -# ================================================================================ -# don't catch _InvalidOutput from scrapy's spider middleware manager -class InvalidReturnValueFromPreviousMiddlewareInputSpider(LocalhostSpider): - name = 'invalid_return_value_from_previous_middleware_input' - custom_settings = { - 'SPIDER_MIDDLEWARES': { - # engine side - 'tests.test_spidermiddleware.InvalidReturnValueInputMiddleware': 540, - 'tests.test_spidermiddleware.CatchExceptionMiddleware': 545, - # spider side - } - } - - def parse(self, response): - return None - - -class InvalidReturnValueInputMiddleware(object): - def process_spider_input(self, response, spider): - return 1.0 # , not None - - -class InvalidReturnValueFromPreviousMiddlewareOutputSpider(LocalhostSpider): - name = 'invalid_return_value_from_previous_middleware_output' - custom_settings = { - 'SPIDER_MIDDLEWARES': { - # engine side - 'tests.test_spidermiddleware.CatchExceptionMiddleware': 540, - 'tests.test_spidermiddleware.InvalidReturnValueOutputMiddleware': 545, - # spider side - } - } - - def parse(self, response): - return None - - -class InvalidReturnValueOutputMiddleware(object): - def process_spider_output(self, response, result, spider): - return 1 # , not an iterable - - -# ================================================================================ -# make sure only non already called process_spider_output methods -# are called if process_spider_exception returns an iterable -class ExecutionChainSpider(LocalhostSpider): - name = 'execution_chain' - custom_settings = { - 'SPIDER_MIDDLEWARES': { - # engine side - 'tests.test_spidermiddleware.ThirdMiddleware': 540, - 'tests.test_spidermiddleware.SecondMiddleware': 541, - 'tests.test_spidermiddleware.FirstMiddleware': 542 - # spider side + __name__ + '.RecoveryMiddleware': 10, }, } def parse(self, response): - return None - - -class FirstMiddleware(object): - def process_spider_output(self, response, result, spider): - for r in result: - if isinstance(r, dict): - r['handled_by_first_middleware'] = True - yield r + yield {'test': 1} + self.logger.warn('DONT_FAIL: %s', response.meta.get('dont_fail')) + if not response.meta.get('dont_fail'): + raise ModuleNotFoundError() +class RecoveryMiddleware: def process_spider_exception(self, response, exception, spider): - # log exception, handle control to the next middleware's process_spider_exception - logging.warn('{} exception caught'.format(exception.__class__.__name__)) - return None + logging.warn('Middleware: %s exception caught', exception.__class__.__name__) + return [ + {'from': 'process_spider_exception'}, + Request(response.url, meta={'dont_fail': True}, dont_filter=True), + ] -class SecondMiddleware(object): - def process_spider_output(self, response, result, spider): - for r in result: - if isinstance(r, dict): - r['handled_by_second_middleware'] = True - yield r - raise MemoryError +# ================================================================================ +# (1) exceptions from a spider middleware's process_spider_input method +class ProcessSpiderInputSpider(Spider): + name = 'ProcessSpiderInputSpider' + custom_settings = { + 'SPIDER_MIDDLEWARES': { + # spider + __name__ + '.LogExceptionMiddleware': 10, + __name__ + '.FailProcessSpiderInputMiddleware': 8, + __name__ + '.LogExceptionMiddleware': 6, + # engine + } + } + + def start_requests(self): + yield Request(TEST_URL, callback=self.parse, errback=self.errback) + + def parse(self, response): + return [{'test': 1}, {'test': 2}] + + def errback(self, failure): + self.logger.warn('Got a Failure on the Request errback') -class ThirdMiddleware(object): - def process_spider_output(self, response, result, spider): - for r in result: - if isinstance(r, dict): - r['handled_by_third_middleware'] = True - yield r - - def process_spider_exception(self, response, exception, spider): - # handle control to the next middleware's process_spider_output - return [{'item': i} for i in range(3)] +class FailProcessSpiderInputMiddleware: + def process_spider_input(self, response, spider): + logging.warn('Middleware: will raise IndexError') + raise IndexError() +# ================================================================================ +# (2) exceptions from a spider callback (generator) +class GeneratorCallbackSpider(Spider): + name = 'GeneratorCallbackSpider' + start_urls = [TEST_URL] + custom_settings = { + 'SPIDER_MIDDLEWARES': { + __name__ + '.LogExceptionMiddleware': 10, + }, + } + + def parse(self, response): + yield {'test': 1} + yield {'test': 2} + raise ImportError() + + +# ================================================================================ +# (3) exceptions from a spider callback (not a generator) +class NotAGeneratorCallbackSpider(Spider): + name = 'NotAGeneratorCallbackSpider' + start_urls = [TEST_URL] + custom_settings = { + 'SPIDER_MIDDLEWARES': { + __name__ + '.LogExceptionMiddleware': 10, + }, + } + + def parse(self, response): + return [{'test': 1}, {'test': 1/0}] + + +# ================================================================================ class TestSpiderMiddleware(TestCase): - @classmethod def setUpClass(cls): cls.mockserver = MockServer() @@ -263,7 +118,7 @@ class TestSpiderMiddleware(TestCase): @classmethod def tearDownClass(cls): cls.mockserver.__exit__(None, None, None) - + @defer.inlineCallbacks def crawl_log(self, spider): crawler = get_crawler(spider) @@ -271,69 +126,45 @@ class TestSpiderMiddleware(TestCase): yield crawler.crawl() raise defer.returnValue(log) - @defer.inlineCallbacks - def test_process_spider_exception_from_parse_method_non_generator(self): - # non-generator return value - log = yield self.crawl_log(NotAGeneratorSpider) - self.assertIn("AssertionError exception caught", str(log)) - self.assertIn("spider_exceptions/AssertionError", str(log)) + # @defer.inlineCallbacks + # def test_recovery(self): + # """ + # Recover from an exception from a spider's callback. The final item count should be 3 + # (one from the spider before raising the exception, one from the middleware and one + # from the spider when processing the response that was enqueued from the middleware) + # """ + # log = yield self.crawl_log(RecoverySpider) + # self.assertIn("Middleware: ModuleNotFoundError exception caught", str(log)) + # self.assertEqual(str(log).count("Middleware: ModuleNotFoundError exception caught"), 1) + # self.assertIn("'item_scraped_count': 3", str(log)) @defer.inlineCallbacks - def test_process_spider_exception_from_parse_method_generator_no_items(self): - # generator return value, no items before the error - log = yield self.crawl_log(GeneratorErrorBeforeItemsSpider) - self.assertIn("ValueError exception caught", str(log)) - self.assertIn("spider_exceptions/ValueError", str(log)) - + def test_process_spider_input_errback(self): + """ + (1) An exception from the process_spider_input chain should not be caught by the + process_spider_exception chain, it should go directly to the Request errback + """ + log1 = yield self.crawl_log(ProcessSpiderInputSpider) + self.assertNotIn("Middleware: IndexError exception caught", str(log1)) + self.assertIn("Middleware: will raise IndexError", str(log1)) + self.assertIn("Got a Failure on the Request errback", str(log1)) + @defer.inlineCallbacks - def test_process_spider_exception_from_parse_method_generator_with_items(self): - # generator return value, 3 items before the error - log = yield self.crawl_log(GeneratorErrorAfterItemsSpider) - self.assertIn("'item_scraped_count': 3", str(log)) - self.assertIn("FloatingPointError exception caught", str(log)) - self.assertIn("spider_exceptions/FloatingPointError", str(log)) - + def test_generator_callback(self): + """ + (2) An exception from a spider's callback should + be caught by the process_spider_exception chain + """ + log2 = yield self.crawl_log(GeneratorCallbackSpider) + self.assertIn("Middleware: ImportError exception caught", str(log2)) + self.assertIn("'item_scraped_count': 2", str(log2)) + @defer.inlineCallbacks - def test_process_spider_exception_from_previous_middleware_input(self): - log = yield self.crawl_log(FromPreviousMiddlewareInputSpider) - self.assertIn("LookupError exception caught", str(log)) - - @defer.inlineCallbacks - def test_process_spider_exception_from_previous_middleware_output(self): - # non-generator output value - log = yield self.crawl_log(NotAGeneratorFromPreviousMiddlewareOutputSpider) - self.assertNotIn("UnicodeError exception caught", str(log)) - # generator output value - log = yield self.crawl_log(GeneratorFromPreviousMiddlewareOutputSpider) - self.assertIn("'item_scraped_count': 3", str(log)) - self.assertIn("NameError exception caught", str(log)) - - @defer.inlineCallbacks - def test_process_spider_exception_do_something(self): - log = yield self.crawl_log(DoSomethingSpider) - self.assertIn("ImportError exception caught", str(log)) - self.assertIn("{'value': 10}", str(log)) - self.assertIn("{'value': 'asdf'}", str(log)) - self.assertIn("{'value': 'http://localhost:8998'}", str(log)) - self.assertIn("{'value': 'http://localhost:8998?processed=true'}", str(log)) - - @defer.inlineCallbacks - def test_process_spider_exception_invalid_return_value_previous_middleware(self): - """ don't catch _InvalidOutput from middleware """ - # on middleware's input - log1 = yield self.crawl_log(InvalidReturnValueFromPreviousMiddlewareInputSpider) - self.assertNotIn("_InvalidOutput exception caught", str(log1)) - self.assertIn("'spider_exceptions/_InvalidOutput'", str(log1)) - # on middleware's output - log2 = yield self.crawl_log(InvalidReturnValueFromPreviousMiddlewareOutputSpider) - self.assertNotIn("_InvalidOutput exception caught", str(log2)) - self.assertIn("'spider_exceptions/_InvalidOutput'", str(log2)) - - @defer.inlineCallbacks - def test_process_spider_exception_execution_chain(self): - # on middleware's input - log = yield self.crawl_log(ExecutionChainSpider) - self.assertNotIn("handled_by_first_middleware", str(log)) - self.assertNotIn("handled_by_second_middleware", str(log)) - self.assertIn("MemoryError exception caught", str(log)) - self.assertIn("handled_by_third_middleware", str(log)) + def test_not_a_generator_callback(self): + """ + (3) An exception from a spider's callback should + be caught by the process_spider_exception chain + """ + log3 = yield self.crawl_log(NotAGeneratorCallbackSpider) + self.assertIn("Middleware: ZeroDivisionError exception caught", str(log3)) + self.assertNotIn("item_scraped_count", str(log3)) From d4c7cc848b83c2ec38ea90b76369885daba7375c Mon Sep 17 00:00:00 2001 From: Mikhail Korobov Date: Fri, 6 Jul 2018 03:19:43 +0500 Subject: [PATCH 048/889] remove backwards compatibility shims for relocated modules --- .coveragerc | 9 --------- conftest.py | 9 +-------- scrapy/command.py | 7 ------- scrapy/contrib/__init__.py | 0 scrapy/contrib/closespider.py | 7 ------- scrapy/contrib/corestats.py | 7 ------- scrapy/contrib/debug.py | 7 ------- .../contrib/downloadermiddleware/__init__.py | 0 .../contrib/downloadermiddleware/ajaxcrawl.py | 7 ------- scrapy/contrib/downloadermiddleware/chunked.py | 7 ------- scrapy/contrib/downloadermiddleware/cookies.py | 7 ------- .../downloadermiddleware/decompression.py | 7 ------- .../downloadermiddleware/defaultheaders.py | 7 ------- .../downloadermiddleware/downloadtimeout.py | 7 ------- .../contrib/downloadermiddleware/httpauth.py | 7 ------- .../contrib/downloadermiddleware/httpcache.py | 7 ------- .../downloadermiddleware/httpcompression.py | 7 ------- .../contrib/downloadermiddleware/httpproxy.py | 7 ------- .../contrib/downloadermiddleware/redirect.py | 7 ------- scrapy/contrib/downloadermiddleware/retry.py | 7 ------- .../contrib/downloadermiddleware/robotstxt.py | 7 ------- scrapy/contrib/downloadermiddleware/stats.py | 7 ------- .../contrib/downloadermiddleware/useragent.py | 7 ------- scrapy/contrib/exporter/__init__.py | 8 -------- scrapy/contrib/feedexport.py | 7 ------- scrapy/contrib/httpcache.py | 7 ------- scrapy/contrib/linkextractors/__init__.py | 7 ------- scrapy/contrib/linkextractors/htmlparser.py | 7 ------- scrapy/contrib/linkextractors/lxmlhtml.py | 7 ------- scrapy/contrib/linkextractors/regex.py | 7 ------- scrapy/contrib/linkextractors/sgml.py | 7 ------- scrapy/contrib/loader/__init__.py | 7 ------- scrapy/contrib/loader/common.py | 7 ------- scrapy/contrib/loader/processor.py | 7 ------- scrapy/contrib/logstats.py | 7 ------- scrapy/contrib/memdebug.py | 7 ------- scrapy/contrib/memusage.py | 7 ------- scrapy/contrib/pipeline/__init__.py | 7 ------- scrapy/contrib/pipeline/files.py | 7 ------- scrapy/contrib/pipeline/images.py | 7 ------- scrapy/contrib/pipeline/media.py | 7 ------- scrapy/contrib/spidermiddleware/__init__.py | 0 scrapy/contrib/spidermiddleware/depth.py | 7 ------- scrapy/contrib/spidermiddleware/httperror.py | 7 ------- scrapy/contrib/spidermiddleware/offsite.py | 7 ------- scrapy/contrib/spidermiddleware/referer.py | 7 ------- scrapy/contrib/spidermiddleware/urllength.py | 7 ------- scrapy/contrib/spiders/__init__.py | 7 ------- scrapy/contrib/spiders/crawl.py | 7 ------- scrapy/contrib/spiders/feed.py | 7 ------- scrapy/contrib/spiders/init.py | 7 ------- scrapy/contrib/spiders/sitemap.py | 7 ------- scrapy/contrib/spiderstate.py | 7 ------- scrapy/contrib/statsmailer.py | 7 ------- scrapy/contrib/throttle.py | 7 ------- scrapy/contrib_exp/__init__.py | 0 .../downloadermiddleware/__init__.py | 0 .../downloadermiddleware/decompression.py | 7 ------- scrapy/contrib_exp/iterators.py | 6 ------ scrapy/dupefilter.py | 7 ------- scrapy/linkextractor.py | 7 ------- scrapy/spider.py | 7 ------- scrapy/squeue.py | 7 ------- scrapy/statscol.py | 7 ------- scrapy/utils/decorator.py | 7 ------- scrapy/utils/deprecate.py | 18 ------------------ 66 files changed, 1 insertion(+), 441 deletions(-) delete mode 100644 scrapy/command.py delete mode 100644 scrapy/contrib/__init__.py delete mode 100644 scrapy/contrib/closespider.py delete mode 100644 scrapy/contrib/corestats.py delete mode 100644 scrapy/contrib/debug.py delete mode 100644 scrapy/contrib/downloadermiddleware/__init__.py delete mode 100644 scrapy/contrib/downloadermiddleware/ajaxcrawl.py delete mode 100644 scrapy/contrib/downloadermiddleware/chunked.py delete mode 100644 scrapy/contrib/downloadermiddleware/cookies.py delete mode 100644 scrapy/contrib/downloadermiddleware/decompression.py delete mode 100644 scrapy/contrib/downloadermiddleware/defaultheaders.py delete mode 100644 scrapy/contrib/downloadermiddleware/downloadtimeout.py delete mode 100644 scrapy/contrib/downloadermiddleware/httpauth.py delete mode 100644 scrapy/contrib/downloadermiddleware/httpcache.py delete mode 100644 scrapy/contrib/downloadermiddleware/httpcompression.py delete mode 100644 scrapy/contrib/downloadermiddleware/httpproxy.py delete mode 100644 scrapy/contrib/downloadermiddleware/redirect.py delete mode 100644 scrapy/contrib/downloadermiddleware/retry.py delete mode 100644 scrapy/contrib/downloadermiddleware/robotstxt.py delete mode 100644 scrapy/contrib/downloadermiddleware/stats.py delete mode 100644 scrapy/contrib/downloadermiddleware/useragent.py delete mode 100644 scrapy/contrib/exporter/__init__.py delete mode 100644 scrapy/contrib/feedexport.py delete mode 100644 scrapy/contrib/httpcache.py delete mode 100644 scrapy/contrib/linkextractors/__init__.py delete mode 100644 scrapy/contrib/linkextractors/htmlparser.py delete mode 100644 scrapy/contrib/linkextractors/lxmlhtml.py delete mode 100644 scrapy/contrib/linkextractors/regex.py delete mode 100644 scrapy/contrib/linkextractors/sgml.py delete mode 100644 scrapy/contrib/loader/__init__.py delete mode 100644 scrapy/contrib/loader/common.py delete mode 100644 scrapy/contrib/loader/processor.py delete mode 100644 scrapy/contrib/logstats.py delete mode 100644 scrapy/contrib/memdebug.py delete mode 100644 scrapy/contrib/memusage.py delete mode 100644 scrapy/contrib/pipeline/__init__.py delete mode 100644 scrapy/contrib/pipeline/files.py delete mode 100644 scrapy/contrib/pipeline/images.py delete mode 100644 scrapy/contrib/pipeline/media.py delete mode 100644 scrapy/contrib/spidermiddleware/__init__.py delete mode 100644 scrapy/contrib/spidermiddleware/depth.py delete mode 100644 scrapy/contrib/spidermiddleware/httperror.py delete mode 100644 scrapy/contrib/spidermiddleware/offsite.py delete mode 100644 scrapy/contrib/spidermiddleware/referer.py delete mode 100644 scrapy/contrib/spidermiddleware/urllength.py delete mode 100644 scrapy/contrib/spiders/__init__.py delete mode 100644 scrapy/contrib/spiders/crawl.py delete mode 100644 scrapy/contrib/spiders/feed.py delete mode 100644 scrapy/contrib/spiders/init.py delete mode 100644 scrapy/contrib/spiders/sitemap.py delete mode 100644 scrapy/contrib/spiderstate.py delete mode 100644 scrapy/contrib/statsmailer.py delete mode 100644 scrapy/contrib/throttle.py delete mode 100644 scrapy/contrib_exp/__init__.py delete mode 100644 scrapy/contrib_exp/downloadermiddleware/__init__.py delete mode 100644 scrapy/contrib_exp/downloadermiddleware/decompression.py delete mode 100644 scrapy/contrib_exp/iterators.py delete mode 100644 scrapy/dupefilter.py delete mode 100644 scrapy/linkextractor.py delete mode 100644 scrapy/spider.py delete mode 100644 scrapy/squeue.py delete mode 100644 scrapy/statscol.py delete mode 100644 scrapy/utils/decorator.py diff --git a/.coveragerc b/.coveragerc index 3105409ba..aeadccb25 100644 --- a/.coveragerc +++ b/.coveragerc @@ -7,13 +7,4 @@ omit = scrapy/conf.py scrapy/stats.py scrapy/project.py - scrapy/utils/decorator.py - scrapy/statscol.py - scrapy/squeue.py scrapy/log.py - scrapy/dupefilter.py - scrapy/command.py - scrapy/linkextractor.py - scrapy/spider.py - scrapy/contrib/* - scrapy/contrib_exp/* diff --git a/conftest.py b/conftest.py index 8b4faf8fc..c733db646 100644 --- a/conftest.py +++ b/conftest.py @@ -13,19 +13,12 @@ collect_ignore = [ "scrapy/conf.py", "scrapy/stats.py", "scrapy/project.py", - "scrapy/utils/decorator.py", - "scrapy/statscol.py", - "scrapy/squeue.py", "scrapy/log.py", - "scrapy/dupefilter.py", - "scrapy/command.py", - "scrapy/linkextractor.py", - "scrapy/spider.py", # not a test, but looks like a test "scrapy/utils/testsite.py", -] + _py_files("scrapy/contrib") + _py_files("scrapy/contrib_exp") +] if (twisted_version.major, twisted_version.minor, twisted_version.micro) >= (15, 5, 0): collect_ignore += _py_files("scrapy/xlib/tx") diff --git a/scrapy/command.py b/scrapy/command.py deleted file mode 100644 index 3e1219bbc..000000000 --- a/scrapy/command.py +++ /dev/null @@ -1,7 +0,0 @@ -import warnings -from scrapy.exceptions import ScrapyDeprecationWarning -warnings.warn("Module `scrapy.command` is deprecated, " - "use `scrapy.commands` instead", - ScrapyDeprecationWarning, stacklevel=2) - -from scrapy.commands import * diff --git a/scrapy/contrib/__init__.py b/scrapy/contrib/__init__.py deleted file mode 100644 index e69de29bb..000000000 diff --git a/scrapy/contrib/closespider.py b/scrapy/contrib/closespider.py deleted file mode 100644 index 9c52c418f..000000000 --- a/scrapy/contrib/closespider.py +++ /dev/null @@ -1,7 +0,0 @@ -import warnings -from scrapy.exceptions import ScrapyDeprecationWarning -warnings.warn("Module `scrapy.contrib.closespider` is deprecated, " - "use `scrapy.extensions.closespider` instead", - ScrapyDeprecationWarning, stacklevel=2) - -from scrapy.extensions.closespider import * diff --git a/scrapy/contrib/corestats.py b/scrapy/contrib/corestats.py deleted file mode 100644 index 2f5354239..000000000 --- a/scrapy/contrib/corestats.py +++ /dev/null @@ -1,7 +0,0 @@ -import warnings -from scrapy.exceptions import ScrapyDeprecationWarning -warnings.warn("Module `scrapy.contrib.corestats` is deprecated, " - "use `scrapy.extensions.corestats` instead", - ScrapyDeprecationWarning, stacklevel=2) - -from scrapy.extensions.corestats import * diff --git a/scrapy/contrib/debug.py b/scrapy/contrib/debug.py deleted file mode 100644 index a38f059ce..000000000 --- a/scrapy/contrib/debug.py +++ /dev/null @@ -1,7 +0,0 @@ -import warnings -from scrapy.exceptions import ScrapyDeprecationWarning -warnings.warn("Module `scrapy.contrib.debug` is deprecated, " - "use `scrapy.extensions.debug` instead", - ScrapyDeprecationWarning, stacklevel=2) - -from scrapy.extensions.debug import * diff --git a/scrapy/contrib/downloadermiddleware/__init__.py b/scrapy/contrib/downloadermiddleware/__init__.py deleted file mode 100644 index e69de29bb..000000000 diff --git a/scrapy/contrib/downloadermiddleware/ajaxcrawl.py b/scrapy/contrib/downloadermiddleware/ajaxcrawl.py deleted file mode 100644 index 90ebc46b6..000000000 --- a/scrapy/contrib/downloadermiddleware/ajaxcrawl.py +++ /dev/null @@ -1,7 +0,0 @@ -import warnings -from scrapy.exceptions import ScrapyDeprecationWarning -warnings.warn("Module `scrapy.contrib.downloadermiddleware.ajaxcrawl` is deprecated, " - "use `scrapy.downloadermiddlewares.ajaxcrawl` instead", - ScrapyDeprecationWarning, stacklevel=2) - -from scrapy.downloadermiddlewares.ajaxcrawl import * diff --git a/scrapy/contrib/downloadermiddleware/chunked.py b/scrapy/contrib/downloadermiddleware/chunked.py deleted file mode 100644 index 1322c9083..000000000 --- a/scrapy/contrib/downloadermiddleware/chunked.py +++ /dev/null @@ -1,7 +0,0 @@ -import warnings -from scrapy.exceptions import ScrapyDeprecationWarning -warnings.warn("Module `scrapy.contrib.downloadermiddleware.chunked` is deprecated, " - "use `scrapy.downloadermiddlewares.chunked` instead", - ScrapyDeprecationWarning, stacklevel=2) - -from scrapy.downloadermiddlewares.chunked import * diff --git a/scrapy/contrib/downloadermiddleware/cookies.py b/scrapy/contrib/downloadermiddleware/cookies.py deleted file mode 100644 index bad970690..000000000 --- a/scrapy/contrib/downloadermiddleware/cookies.py +++ /dev/null @@ -1,7 +0,0 @@ -import warnings -from scrapy.exceptions import ScrapyDeprecationWarning -warnings.warn("Module `scrapy.contrib.downloadermiddleware.cookies` is deprecated, " - "use `scrapy.downloadermiddlewares.cookies` instead", - ScrapyDeprecationWarning, stacklevel=2) - -from scrapy.downloadermiddlewares.cookies import * diff --git a/scrapy/contrib/downloadermiddleware/decompression.py b/scrapy/contrib/downloadermiddleware/decompression.py deleted file mode 100644 index a541aa61e..000000000 --- a/scrapy/contrib/downloadermiddleware/decompression.py +++ /dev/null @@ -1,7 +0,0 @@ -import warnings -from scrapy.exceptions import ScrapyDeprecationWarning -warnings.warn("Module `scrapy.contrib.downloadermiddleware.decompression` is deprecated, " - "use `scrapy.downloadermiddlewares.decompression` instead", - ScrapyDeprecationWarning, stacklevel=2) - -from scrapy.downloadermiddlewares.decompression import * diff --git a/scrapy/contrib/downloadermiddleware/defaultheaders.py b/scrapy/contrib/downloadermiddleware/defaultheaders.py deleted file mode 100644 index cf023dc8f..000000000 --- a/scrapy/contrib/downloadermiddleware/defaultheaders.py +++ /dev/null @@ -1,7 +0,0 @@ -import warnings -from scrapy.exceptions import ScrapyDeprecationWarning -warnings.warn("Module `scrapy.contrib.downloadermiddleware.defaultheaders` is deprecated, " - "use `scrapy.downloadermiddlewares.defaultheaders` instead", - ScrapyDeprecationWarning, stacklevel=2) - -from scrapy.downloadermiddlewares.defaultheaders import * diff --git a/scrapy/contrib/downloadermiddleware/downloadtimeout.py b/scrapy/contrib/downloadermiddleware/downloadtimeout.py deleted file mode 100644 index 84bd06acf..000000000 --- a/scrapy/contrib/downloadermiddleware/downloadtimeout.py +++ /dev/null @@ -1,7 +0,0 @@ -import warnings -from scrapy.exceptions import ScrapyDeprecationWarning -warnings.warn("Module `scrapy.contrib.downloadermiddleware.downloadtimeout` is deprecated, " - "use `scrapy.downloadermiddlewares.downloadtimeout` instead", - ScrapyDeprecationWarning, stacklevel=2) - -from scrapy.downloadermiddlewares.downloadtimeout import * diff --git a/scrapy/contrib/downloadermiddleware/httpauth.py b/scrapy/contrib/downloadermiddleware/httpauth.py deleted file mode 100644 index a37ffa0dc..000000000 --- a/scrapy/contrib/downloadermiddleware/httpauth.py +++ /dev/null @@ -1,7 +0,0 @@ -import warnings -from scrapy.exceptions import ScrapyDeprecationWarning -warnings.warn("Module `scrapy.contrib.downloadermiddleware.httpauth` is deprecated, " - "use `scrapy.downloadermiddlewares.httpauth` instead", - ScrapyDeprecationWarning, stacklevel=2) - -from scrapy.downloadermiddlewares.httpauth import * diff --git a/scrapy/contrib/downloadermiddleware/httpcache.py b/scrapy/contrib/downloadermiddleware/httpcache.py deleted file mode 100644 index f5f068204..000000000 --- a/scrapy/contrib/downloadermiddleware/httpcache.py +++ /dev/null @@ -1,7 +0,0 @@ -import warnings -from scrapy.exceptions import ScrapyDeprecationWarning -warnings.warn("Module `scrapy.contrib.downloadermiddleware.httpcache` is deprecated, " - "use `scrapy.downloadermiddlewares.httpcache` instead", - ScrapyDeprecationWarning, stacklevel=2) - -from scrapy.downloadermiddlewares.httpcache import * diff --git a/scrapy/contrib/downloadermiddleware/httpcompression.py b/scrapy/contrib/downloadermiddleware/httpcompression.py deleted file mode 100644 index 8a52ec50b..000000000 --- a/scrapy/contrib/downloadermiddleware/httpcompression.py +++ /dev/null @@ -1,7 +0,0 @@ -import warnings -from scrapy.exceptions import ScrapyDeprecationWarning -warnings.warn("Module `scrapy.contrib.downloadermiddleware.httpcompression` is deprecated, " - "use `scrapy.downloadermiddlewares.httpcompression` instead", - ScrapyDeprecationWarning, stacklevel=2) - -from scrapy.downloadermiddlewares.httpcompression import * diff --git a/scrapy/contrib/downloadermiddleware/httpproxy.py b/scrapy/contrib/downloadermiddleware/httpproxy.py deleted file mode 100644 index d94d85076..000000000 --- a/scrapy/contrib/downloadermiddleware/httpproxy.py +++ /dev/null @@ -1,7 +0,0 @@ -import warnings -from scrapy.exceptions import ScrapyDeprecationWarning -warnings.warn("Module `scrapy.contrib.downloadermiddleware.httpproxy` is deprecated, " - "use `scrapy.downloadermiddlewares.httpproxy` instead", - ScrapyDeprecationWarning, stacklevel=2) - -from scrapy.downloadermiddlewares.httpproxy import * diff --git a/scrapy/contrib/downloadermiddleware/redirect.py b/scrapy/contrib/downloadermiddleware/redirect.py deleted file mode 100644 index 824eee8ae..000000000 --- a/scrapy/contrib/downloadermiddleware/redirect.py +++ /dev/null @@ -1,7 +0,0 @@ -import warnings -from scrapy.exceptions import ScrapyDeprecationWarning -warnings.warn("Module `scrapy.contrib.downloadermiddleware.redirect` is deprecated, " - "use `scrapy.downloadermiddlewares.redirect` instead", - ScrapyDeprecationWarning, stacklevel=2) - -from scrapy.downloadermiddlewares.redirect import * diff --git a/scrapy/contrib/downloadermiddleware/retry.py b/scrapy/contrib/downloadermiddleware/retry.py deleted file mode 100644 index aafe0f508..000000000 --- a/scrapy/contrib/downloadermiddleware/retry.py +++ /dev/null @@ -1,7 +0,0 @@ -import warnings -from scrapy.exceptions import ScrapyDeprecationWarning -warnings.warn("Module `scrapy.contrib.downloadermiddleware.retry` is deprecated, " - "use `scrapy.downloadermiddlewares.retry` instead", - ScrapyDeprecationWarning, stacklevel=2) - -from scrapy.downloadermiddlewares.retry import * diff --git a/scrapy/contrib/downloadermiddleware/robotstxt.py b/scrapy/contrib/downloadermiddleware/robotstxt.py deleted file mode 100644 index 408f760a0..000000000 --- a/scrapy/contrib/downloadermiddleware/robotstxt.py +++ /dev/null @@ -1,7 +0,0 @@ -import warnings -from scrapy.exceptions import ScrapyDeprecationWarning -warnings.warn("Module `scrapy.contrib.downloadermiddleware.robotstxt` is deprecated, " - "use `scrapy.downloadermiddlewares.robotstxt` instead", - ScrapyDeprecationWarning, stacklevel=2) - -from scrapy.downloadermiddlewares.robotstxt import * diff --git a/scrapy/contrib/downloadermiddleware/stats.py b/scrapy/contrib/downloadermiddleware/stats.py deleted file mode 100644 index fa84a8206..000000000 --- a/scrapy/contrib/downloadermiddleware/stats.py +++ /dev/null @@ -1,7 +0,0 @@ -import warnings -from scrapy.exceptions import ScrapyDeprecationWarning -warnings.warn("Module `scrapy.contrib.downloadermiddleware.stats` is deprecated, " - "use `scrapy.downloadermiddlewares.stats` instead", - ScrapyDeprecationWarning, stacklevel=2) - -from scrapy.downloadermiddlewares.stats import * diff --git a/scrapy/contrib/downloadermiddleware/useragent.py b/scrapy/contrib/downloadermiddleware/useragent.py deleted file mode 100644 index 893d5241c..000000000 --- a/scrapy/contrib/downloadermiddleware/useragent.py +++ /dev/null @@ -1,7 +0,0 @@ -import warnings -from scrapy.exceptions import ScrapyDeprecationWarning -warnings.warn("Module `scrapy.contrib.downloadermiddleware.useragent` is deprecated, " - "use `scrapy.downloadermiddlewares.useragent` instead", - ScrapyDeprecationWarning, stacklevel=2) - -from scrapy.downloadermiddlewares.useragent import * diff --git a/scrapy/contrib/exporter/__init__.py b/scrapy/contrib/exporter/__init__.py deleted file mode 100644 index 12adaaddd..000000000 --- a/scrapy/contrib/exporter/__init__.py +++ /dev/null @@ -1,8 +0,0 @@ -import warnings -from scrapy.exceptions import ScrapyDeprecationWarning -warnings.warn("Module `scrapy.contrib.exporter` is deprecated, " - "use `scrapy.exporters` instead", - ScrapyDeprecationWarning, stacklevel=2) - -from scrapy.exporters import * -from scrapy.exporters import PythonItemExporter diff --git a/scrapy/contrib/feedexport.py b/scrapy/contrib/feedexport.py deleted file mode 100644 index 19651998a..000000000 --- a/scrapy/contrib/feedexport.py +++ /dev/null @@ -1,7 +0,0 @@ -import warnings -from scrapy.exceptions import ScrapyDeprecationWarning -warnings.warn("Module `scrapy.contrib.feedexport` is deprecated, " - "use `scrapy.extensions.feedexport` instead", - ScrapyDeprecationWarning, stacklevel=2) - -from scrapy.extensions.feedexport import * diff --git a/scrapy/contrib/httpcache.py b/scrapy/contrib/httpcache.py deleted file mode 100644 index 196372fcb..000000000 --- a/scrapy/contrib/httpcache.py +++ /dev/null @@ -1,7 +0,0 @@ -import warnings -from scrapy.exceptions import ScrapyDeprecationWarning -warnings.warn("Module `scrapy.contrib.httpcache` is deprecated, " - "use `scrapy.extensions.httpcache` instead", - ScrapyDeprecationWarning, stacklevel=2) - -from scrapy.extensions.httpcache import * diff --git a/scrapy/contrib/linkextractors/__init__.py b/scrapy/contrib/linkextractors/__init__.py deleted file mode 100644 index 976658df3..000000000 --- a/scrapy/contrib/linkextractors/__init__.py +++ /dev/null @@ -1,7 +0,0 @@ -import warnings -from scrapy.exceptions import ScrapyDeprecationWarning -warnings.warn("Module `scrapy.contrib.linkextractors` is deprecated, " - "use `scrapy.linkextractors` instead", - ScrapyDeprecationWarning, stacklevel=2) - -from scrapy.linkextractors import * diff --git a/scrapy/contrib/linkextractors/htmlparser.py b/scrapy/contrib/linkextractors/htmlparser.py deleted file mode 100644 index ff03da98f..000000000 --- a/scrapy/contrib/linkextractors/htmlparser.py +++ /dev/null @@ -1,7 +0,0 @@ -import warnings -from scrapy.exceptions import ScrapyDeprecationWarning -warnings.warn("Module `scrapy.contrib.linkextractors.htmlparser` is deprecated, " - "use `scrapy.linkextractors.htmlparser` instead", - ScrapyDeprecationWarning, stacklevel=2) - -from scrapy.linkextractors.htmlparser import * diff --git a/scrapy/contrib/linkextractors/lxmlhtml.py b/scrapy/contrib/linkextractors/lxmlhtml.py deleted file mode 100644 index fc2b7de3c..000000000 --- a/scrapy/contrib/linkextractors/lxmlhtml.py +++ /dev/null @@ -1,7 +0,0 @@ -import warnings -from scrapy.exceptions import ScrapyDeprecationWarning -warnings.warn("Module `scrapy.contrib.linkextractors.lxmlhtml` is deprecated, " - "use `scrapy.linkextractors.lxmlhtml` instead", - ScrapyDeprecationWarning, stacklevel=2) - -from scrapy.linkextractors.lxmlhtml import * diff --git a/scrapy/contrib/linkextractors/regex.py b/scrapy/contrib/linkextractors/regex.py deleted file mode 100644 index 97bda29c1..000000000 --- a/scrapy/contrib/linkextractors/regex.py +++ /dev/null @@ -1,7 +0,0 @@ -import warnings -from scrapy.exceptions import ScrapyDeprecationWarning -warnings.warn("Module `scrapy.contrib.linkextractors.regex` is deprecated, " - "use `scrapy.linkextractors.regex` instead", - ScrapyDeprecationWarning, stacklevel=2) - -from scrapy.linkextractors.regex import * diff --git a/scrapy/contrib/linkextractors/sgml.py b/scrapy/contrib/linkextractors/sgml.py deleted file mode 100644 index a5a598208..000000000 --- a/scrapy/contrib/linkextractors/sgml.py +++ /dev/null @@ -1,7 +0,0 @@ -import warnings -from scrapy.exceptions import ScrapyDeprecationWarning -warnings.warn("Module `scrapy.contrib.linkextractors.sgml` is deprecated, " - "use `scrapy.linkextractors.sgml` instead", - ScrapyDeprecationWarning, stacklevel=2) - -from scrapy.linkextractors.sgml import * diff --git a/scrapy/contrib/loader/__init__.py b/scrapy/contrib/loader/__init__.py deleted file mode 100644 index 2b9453e18..000000000 --- a/scrapy/contrib/loader/__init__.py +++ /dev/null @@ -1,7 +0,0 @@ -import warnings -from scrapy.exceptions import ScrapyDeprecationWarning -warnings.warn("Module `scrapy.contrib.loader` is deprecated, " - "use `scrapy.loader` instead", - ScrapyDeprecationWarning, stacklevel=2) - -from scrapy.loader import * diff --git a/scrapy/contrib/loader/common.py b/scrapy/contrib/loader/common.py deleted file mode 100644 index a59b2b7b1..000000000 --- a/scrapy/contrib/loader/common.py +++ /dev/null @@ -1,7 +0,0 @@ -import warnings -from scrapy.exceptions import ScrapyDeprecationWarning -warnings.warn("Module `scrapy.contrib.loader.common` is deprecated, " - "use `scrapy.loader.common` instead", - ScrapyDeprecationWarning, stacklevel=2) - -from scrapy.loader.common import * diff --git a/scrapy/contrib/loader/processor.py b/scrapy/contrib/loader/processor.py deleted file mode 100644 index da7e484a5..000000000 --- a/scrapy/contrib/loader/processor.py +++ /dev/null @@ -1,7 +0,0 @@ -import warnings -from scrapy.exceptions import ScrapyDeprecationWarning -warnings.warn("Module `scrapy.contrib.loader.processor` is deprecated, " - "use `scrapy.loader.processors` instead", - ScrapyDeprecationWarning, stacklevel=2) - -from scrapy.loader.processors import * diff --git a/scrapy/contrib/logstats.py b/scrapy/contrib/logstats.py deleted file mode 100644 index 62bc9b860..000000000 --- a/scrapy/contrib/logstats.py +++ /dev/null @@ -1,7 +0,0 @@ -import warnings -from scrapy.exceptions import ScrapyDeprecationWarning -warnings.warn("Module `scrapy.contrib.logstats` is deprecated, " - "use `scrapy.extensions.logstats` instead", - ScrapyDeprecationWarning, stacklevel=2) - -from scrapy.extensions.logstats import * diff --git a/scrapy/contrib/memdebug.py b/scrapy/contrib/memdebug.py deleted file mode 100644 index 4f6e4760e..000000000 --- a/scrapy/contrib/memdebug.py +++ /dev/null @@ -1,7 +0,0 @@ -import warnings -from scrapy.exceptions import ScrapyDeprecationWarning -warnings.warn("Module `scrapy.contrib.memdebug` is deprecated, " - "use `scrapy.extensions.memdebug` instead", - ScrapyDeprecationWarning, stacklevel=2) - -from scrapy.extensions.memdebug import * diff --git a/scrapy/contrib/memusage.py b/scrapy/contrib/memusage.py deleted file mode 100644 index e13bd78f3..000000000 --- a/scrapy/contrib/memusage.py +++ /dev/null @@ -1,7 +0,0 @@ -import warnings -from scrapy.exceptions import ScrapyDeprecationWarning -warnings.warn("Module `scrapy.contrib.memusage` is deprecated, " - "use `scrapy.extensions.memusage` instead", - ScrapyDeprecationWarning, stacklevel=2) - -from scrapy.extensions.memusage import * diff --git a/scrapy/contrib/pipeline/__init__.py b/scrapy/contrib/pipeline/__init__.py deleted file mode 100644 index aedf34a3f..000000000 --- a/scrapy/contrib/pipeline/__init__.py +++ /dev/null @@ -1,7 +0,0 @@ -import warnings -from scrapy.exceptions import ScrapyDeprecationWarning -warnings.warn("Module `scrapy.contrib.pipeline` is deprecated, " - "use `scrapy.pipelines` instead", - ScrapyDeprecationWarning, stacklevel=2) - -from scrapy.pipelines import * diff --git a/scrapy/contrib/pipeline/files.py b/scrapy/contrib/pipeline/files.py deleted file mode 100644 index cd1238b5d..000000000 --- a/scrapy/contrib/pipeline/files.py +++ /dev/null @@ -1,7 +0,0 @@ -import warnings -from scrapy.exceptions import ScrapyDeprecationWarning -warnings.warn("Module `scrapy.contrib.pipeline.files` is deprecated, " - "use `scrapy.pipelines.files` instead", - ScrapyDeprecationWarning, stacklevel=2) - -from scrapy.pipelines.files import * diff --git a/scrapy/contrib/pipeline/images.py b/scrapy/contrib/pipeline/images.py deleted file mode 100644 index 4f5ce4c40..000000000 --- a/scrapy/contrib/pipeline/images.py +++ /dev/null @@ -1,7 +0,0 @@ -import warnings -from scrapy.exceptions import ScrapyDeprecationWarning -warnings.warn("Module `scrapy.contrib.pipeline.images` is deprecated, " - "use `scrapy.pipelines.images` instead", - ScrapyDeprecationWarning, stacklevel=2) - -from scrapy.pipelines.images import * diff --git a/scrapy/contrib/pipeline/media.py b/scrapy/contrib/pipeline/media.py deleted file mode 100644 index 4b4fea560..000000000 --- a/scrapy/contrib/pipeline/media.py +++ /dev/null @@ -1,7 +0,0 @@ -import warnings -from scrapy.exceptions import ScrapyDeprecationWarning -warnings.warn("Module `scrapy.contrib.pipeline.media` is deprecated, " - "use `scrapy.pipelines.media` instead", - ScrapyDeprecationWarning, stacklevel=2) - -from scrapy.pipelines.media import * diff --git a/scrapy/contrib/spidermiddleware/__init__.py b/scrapy/contrib/spidermiddleware/__init__.py deleted file mode 100644 index e69de29bb..000000000 diff --git a/scrapy/contrib/spidermiddleware/depth.py b/scrapy/contrib/spidermiddleware/depth.py deleted file mode 100644 index 718803148..000000000 --- a/scrapy/contrib/spidermiddleware/depth.py +++ /dev/null @@ -1,7 +0,0 @@ -import warnings -from scrapy.exceptions import ScrapyDeprecationWarning -warnings.warn("Module `scrapy.contrib.spidermiddleware.depth` is deprecated, " - "use `scrapy.spidermiddlewares.depth` instead", - ScrapyDeprecationWarning, stacklevel=2) - -from scrapy.spidermiddlewares.depth import * diff --git a/scrapy/contrib/spidermiddleware/httperror.py b/scrapy/contrib/spidermiddleware/httperror.py deleted file mode 100644 index e39fb3f56..000000000 --- a/scrapy/contrib/spidermiddleware/httperror.py +++ /dev/null @@ -1,7 +0,0 @@ -import warnings -from scrapy.exceptions import ScrapyDeprecationWarning -warnings.warn("Module `scrapy.contrib.spidermiddleware.httperror` is deprecated, " - "use `scrapy.spidermiddlewares.httperror` instead", - ScrapyDeprecationWarning, stacklevel=2) - -from scrapy.spidermiddlewares.httperror import * diff --git a/scrapy/contrib/spidermiddleware/offsite.py b/scrapy/contrib/spidermiddleware/offsite.py deleted file mode 100644 index a5ed9ea7e..000000000 --- a/scrapy/contrib/spidermiddleware/offsite.py +++ /dev/null @@ -1,7 +0,0 @@ -import warnings -from scrapy.exceptions import ScrapyDeprecationWarning -warnings.warn("Module `scrapy.contrib.spidermiddleware.offsite` is deprecated, " - "use `scrapy.spidermiddlewares.offsite` instead", - ScrapyDeprecationWarning, stacklevel=2) - -from scrapy.spidermiddlewares.offsite import * diff --git a/scrapy/contrib/spidermiddleware/referer.py b/scrapy/contrib/spidermiddleware/referer.py deleted file mode 100644 index fdf8d6659..000000000 --- a/scrapy/contrib/spidermiddleware/referer.py +++ /dev/null @@ -1,7 +0,0 @@ -import warnings -from scrapy.exceptions import ScrapyDeprecationWarning -warnings.warn("Module `scrapy.contrib.spidermiddleware.referer` is deprecated, " - "use `scrapy.spidermiddlewares.referer` instead", - ScrapyDeprecationWarning, stacklevel=2) - -from scrapy.spidermiddlewares.referer import * diff --git a/scrapy/contrib/spidermiddleware/urllength.py b/scrapy/contrib/spidermiddleware/urllength.py deleted file mode 100644 index 5e51add59..000000000 --- a/scrapy/contrib/spidermiddleware/urllength.py +++ /dev/null @@ -1,7 +0,0 @@ -import warnings -from scrapy.exceptions import ScrapyDeprecationWarning -warnings.warn("Module `scrapy.contrib.spidermiddleware.urllength` is deprecated, " - "use `scrapy.spidermiddlewares.urllength` instead", - ScrapyDeprecationWarning, stacklevel=2) - -from scrapy.spidermiddlewares.urllength import * diff --git a/scrapy/contrib/spiders/__init__.py b/scrapy/contrib/spiders/__init__.py deleted file mode 100644 index 56780533b..000000000 --- a/scrapy/contrib/spiders/__init__.py +++ /dev/null @@ -1,7 +0,0 @@ -import warnings -from scrapy.exceptions import ScrapyDeprecationWarning -warnings.warn("Module `scrapy.contrib.spiders` is deprecated, " - "use `scrapy.spiders` instead", - ScrapyDeprecationWarning, stacklevel=2) - -from scrapy.spiders import * diff --git a/scrapy/contrib/spiders/crawl.py b/scrapy/contrib/spiders/crawl.py deleted file mode 100644 index d20a8bb16..000000000 --- a/scrapy/contrib/spiders/crawl.py +++ /dev/null @@ -1,7 +0,0 @@ -import warnings -from scrapy.exceptions import ScrapyDeprecationWarning -warnings.warn("Module `scrapy.contrib.spiders.crawl` is deprecated, " - "use `scrapy.spiders.crawl` instead", - ScrapyDeprecationWarning, stacklevel=2) - -from scrapy.spiders.crawl import * diff --git a/scrapy/contrib/spiders/feed.py b/scrapy/contrib/spiders/feed.py deleted file mode 100644 index 5eea9a062..000000000 --- a/scrapy/contrib/spiders/feed.py +++ /dev/null @@ -1,7 +0,0 @@ -import warnings -from scrapy.exceptions import ScrapyDeprecationWarning -warnings.warn("Module `scrapy.contrib.spiders.feed` is deprecated, " - "use `scrapy.spiders.feed` instead", - ScrapyDeprecationWarning, stacklevel=2) - -from scrapy.spiders.feed import * diff --git a/scrapy/contrib/spiders/init.py b/scrapy/contrib/spiders/init.py deleted file mode 100644 index 6d1ec0aa9..000000000 --- a/scrapy/contrib/spiders/init.py +++ /dev/null @@ -1,7 +0,0 @@ -import warnings -from scrapy.exceptions import ScrapyDeprecationWarning -warnings.warn("Module `scrapy.contrib.spiders.init` is deprecated, " - "use `scrapy.spiders.init` instead", - ScrapyDeprecationWarning, stacklevel=2) - -from scrapy.spiders.init import * diff --git a/scrapy/contrib/spiders/sitemap.py b/scrapy/contrib/spiders/sitemap.py deleted file mode 100644 index 2ad231fd8..000000000 --- a/scrapy/contrib/spiders/sitemap.py +++ /dev/null @@ -1,7 +0,0 @@ -import warnings -from scrapy.exceptions import ScrapyDeprecationWarning -warnings.warn("Module `scrapy.contrib.spiders.sitemap` is deprecated, " - "use `scrapy.spiders.sitemap` instead", - ScrapyDeprecationWarning, stacklevel=2) - -from scrapy.spiders.sitemap import * diff --git a/scrapy/contrib/spiderstate.py b/scrapy/contrib/spiderstate.py deleted file mode 100644 index 06afc8bfc..000000000 --- a/scrapy/contrib/spiderstate.py +++ /dev/null @@ -1,7 +0,0 @@ -import warnings -from scrapy.exceptions import ScrapyDeprecationWarning -warnings.warn("Module `scrapy.contrib.spiderstate` is deprecated, " - "use `scrapy.extensions.spiderstate` instead", - ScrapyDeprecationWarning, stacklevel=2) - -from scrapy.extensions.spiderstate import * diff --git a/scrapy/contrib/statsmailer.py b/scrapy/contrib/statsmailer.py deleted file mode 100644 index f9c9a37f5..000000000 --- a/scrapy/contrib/statsmailer.py +++ /dev/null @@ -1,7 +0,0 @@ -import warnings -from scrapy.exceptions import ScrapyDeprecationWarning -warnings.warn("Module `scrapy.contrib.statsmailer` is deprecated, " - "use `scrapy.extensions.statsmailer` instead", - ScrapyDeprecationWarning, stacklevel=2) - -from scrapy.extensions.statsmailer import * diff --git a/scrapy/contrib/throttle.py b/scrapy/contrib/throttle.py deleted file mode 100644 index d5c234871..000000000 --- a/scrapy/contrib/throttle.py +++ /dev/null @@ -1,7 +0,0 @@ -import warnings -from scrapy.exceptions import ScrapyDeprecationWarning -warnings.warn("Module `scrapy.contrib.throttle` is deprecated, " - "use `scrapy.extensions.throttle` instead", - ScrapyDeprecationWarning, stacklevel=2) - -from scrapy.extensions.throttle import * diff --git a/scrapy/contrib_exp/__init__.py b/scrapy/contrib_exp/__init__.py deleted file mode 100644 index e69de29bb..000000000 diff --git a/scrapy/contrib_exp/downloadermiddleware/__init__.py b/scrapy/contrib_exp/downloadermiddleware/__init__.py deleted file mode 100644 index e69de29bb..000000000 diff --git a/scrapy/contrib_exp/downloadermiddleware/decompression.py b/scrapy/contrib_exp/downloadermiddleware/decompression.py deleted file mode 100644 index 1f8490587..000000000 --- a/scrapy/contrib_exp/downloadermiddleware/decompression.py +++ /dev/null @@ -1,7 +0,0 @@ -import warnings -from scrapy.exceptions import ScrapyDeprecationWarning -warnings.warn("Module `scrapy.contrib_exp.downloadermiddleware.decompression` is deprecated, " - "use `scrapy.downloadermiddlewares.decompression` instead", - ScrapyDeprecationWarning, stacklevel=2) - -from scrapy.downloadermiddlewares.decompression import DecompressionMiddleware diff --git a/scrapy/contrib_exp/iterators.py b/scrapy/contrib_exp/iterators.py deleted file mode 100644 index c59f47bcc..000000000 --- a/scrapy/contrib_exp/iterators.py +++ /dev/null @@ -1,6 +0,0 @@ -import warnings -from scrapy.exceptions import ScrapyDeprecationWarning -warnings.warn("Module `scrapy.contrib_exp.iterators` is deprecated, use `scrapy.utils.iterators` instead", - ScrapyDeprecationWarning, stacklevel=2) - -from scrapy.utils.iterators import xmliter_lxml diff --git a/scrapy/dupefilter.py b/scrapy/dupefilter.py deleted file mode 100644 index 232d96288..000000000 --- a/scrapy/dupefilter.py +++ /dev/null @@ -1,7 +0,0 @@ -import warnings -from scrapy.exceptions import ScrapyDeprecationWarning -warnings.warn("Module `scrapy.dupefilter` is deprecated, " - "use `scrapy.dupefilters` instead", - ScrapyDeprecationWarning, stacklevel=2) - -from scrapy.dupefilters import * diff --git a/scrapy/linkextractor.py b/scrapy/linkextractor.py deleted file mode 100644 index b744aff8e..000000000 --- a/scrapy/linkextractor.py +++ /dev/null @@ -1,7 +0,0 @@ -import warnings -from scrapy.exceptions import ScrapyDeprecationWarning -warnings.warn("Module `scrapy.linkextractor` is deprecated, " - "use `scrapy.linkextractors` instead", - ScrapyDeprecationWarning, stacklevel=2) - -from scrapy.linkextractors import * diff --git a/scrapy/spider.py b/scrapy/spider.py deleted file mode 100644 index 56a5a0a0b..000000000 --- a/scrapy/spider.py +++ /dev/null @@ -1,7 +0,0 @@ -import warnings -from scrapy.exceptions import ScrapyDeprecationWarning -warnings.warn("Module `scrapy.spider` is deprecated, " - "use `scrapy.spiders` instead", - ScrapyDeprecationWarning, stacklevel=2) - -from scrapy.spiders import * diff --git a/scrapy/squeue.py b/scrapy/squeue.py deleted file mode 100644 index a4a3f4238..000000000 --- a/scrapy/squeue.py +++ /dev/null @@ -1,7 +0,0 @@ -import warnings -from scrapy.exceptions import ScrapyDeprecationWarning -warnings.warn("Module `scrapy.squeue` is deprecated, " - "use `scrapy.squeues` instead", - ScrapyDeprecationWarning, stacklevel=2) - -from scrapy.squeues import * diff --git a/scrapy/statscol.py b/scrapy/statscol.py deleted file mode 100644 index b4ddcce28..000000000 --- a/scrapy/statscol.py +++ /dev/null @@ -1,7 +0,0 @@ -import warnings -from scrapy.exceptions import ScrapyDeprecationWarning -warnings.warn("Module `scrapy.statscol` is deprecated, " - "use `scrapy.statscollectors` instead", - ScrapyDeprecationWarning, stacklevel=2) - -from scrapy.statscollectors import * diff --git a/scrapy/utils/decorator.py b/scrapy/utils/decorator.py deleted file mode 100644 index e8c8eae39..000000000 --- a/scrapy/utils/decorator.py +++ /dev/null @@ -1,7 +0,0 @@ -import warnings -from scrapy.exceptions import ScrapyDeprecationWarning -warnings.warn("Module `scrapy.utils.decorator` is deprecated, " - "use `scrapy.utils.decorators` instead", - ScrapyDeprecationWarning, stacklevel=2) - -from scrapy.utils.decorators import * diff --git a/scrapy/utils/deprecate.py b/scrapy/utils/deprecate.py index f76161a68..8c72cc556 100644 --- a/scrapy/utils/deprecate.py +++ b/scrapy/utils/deprecate.py @@ -124,25 +124,7 @@ def _clspath(cls, forced=None): DEPRECATION_RULES = [ - ('scrapy.contrib_exp.downloadermiddleware.decompression.', 'scrapy.downloadermiddlewares.decompression.'), - ('scrapy.contrib_exp.iterators.', 'scrapy.utils.iterators.'), - ('scrapy.contrib.downloadermiddleware.', 'scrapy.downloadermiddlewares.'), - ('scrapy.contrib.exporter.', 'scrapy.exporters.'), - ('scrapy.contrib.linkextractors.', 'scrapy.linkextractors.'), - ('scrapy.contrib.loader.processor.', 'scrapy.loader.processors.'), - ('scrapy.contrib.loader.', 'scrapy.loader.'), - ('scrapy.contrib.pipeline.', 'scrapy.pipelines.'), - ('scrapy.contrib.spidermiddleware.', 'scrapy.spidermiddlewares.'), - ('scrapy.contrib.spiders.', 'scrapy.spiders.'), - ('scrapy.contrib.', 'scrapy.extensions.'), - ('scrapy.command.', 'scrapy.commands.'), - ('scrapy.dupefilter.', 'scrapy.dupefilters.'), - ('scrapy.linkextractor.', 'scrapy.linkextractors.'), ('scrapy.telnet.', 'scrapy.extensions.telnet.'), - ('scrapy.spider.', 'scrapy.spiders.'), - ('scrapy.squeue.', 'scrapy.squeues.'), - ('scrapy.statscol.', 'scrapy.statscollectors.'), - ('scrapy.utils.decorator.', 'scrapy.utils.decorators.'), ('scrapy.spidermanager.SpiderManager', 'scrapy.spiderloader.SpiderLoader'), ] From 36453348fad9babc96558ab10af9b2942eb5431e Mon Sep 17 00:00:00 2001 From: Mikhail Korobov Date: Fri, 6 Jul 2018 03:23:37 +0500 Subject: [PATCH 049/889] remove ancient modules kept only for error messages --- .coveragerc | 2 -- conftest.py | 2 -- scrapy/project.py | 17 ----------------- scrapy/stats.py | 8 -------- 4 files changed, 29 deletions(-) delete mode 100644 scrapy/project.py delete mode 100644 scrapy/stats.py diff --git a/.coveragerc b/.coveragerc index aeadccb25..1fde07e7e 100644 --- a/.coveragerc +++ b/.coveragerc @@ -5,6 +5,4 @@ omit = tests/* scrapy/xlib/* scrapy/conf.py - scrapy/stats.py - scrapy/project.py scrapy/log.py diff --git a/conftest.py b/conftest.py index c733db646..2d015f5e9 100644 --- a/conftest.py +++ b/conftest.py @@ -11,8 +11,6 @@ def _py_files(folder): collect_ignore = [ # deprecated or moved modules "scrapy/conf.py", - "scrapy/stats.py", - "scrapy/project.py", "scrapy/log.py", # not a test, but looks like a test diff --git a/scrapy/project.py b/scrapy/project.py deleted file mode 100644 index d8973a6c7..000000000 --- a/scrapy/project.py +++ /dev/null @@ -1,17 +0,0 @@ - -""" -Obsolete module, kept for giving a meaningful error message when trying to -import. -""" - -raise ImportError("""scrapy.project usage has become obsolete. - -If you want to get the Scrapy crawler from your extension, middleware or -pipeline implement the `from_crawler` class method (or look up for extending -components that have already done it, such as spiders). - -For example: - - @classmethod - def from_crawler(cls, crawler): - return cls(crawler)""") diff --git a/scrapy/stats.py b/scrapy/stats.py deleted file mode 100644 index 710601430..000000000 --- a/scrapy/stats.py +++ /dev/null @@ -1,8 +0,0 @@ - -""" -Obsolete module, kept for giving a meaningful error message when trying to -import. -""" - -raise ImportError("scrapy.stats usage has become obsolete, use " - "`crawler.stats` attribute instead") From f531b66822491140740a6d86af2f3f11f0443d38 Mon Sep 17 00:00:00 2001 From: Mikhail Korobov Date: Fri, 6 Jul 2018 03:28:01 +0500 Subject: [PATCH 050/889] SpiderManager shim is removed --- scrapy/interfaces.py | 4 ---- scrapy/spidermanager.py | 7 ------- scrapy/utils/deprecate.py | 1 - 3 files changed, 12 deletions(-) delete mode 100644 scrapy/spidermanager.py diff --git a/scrapy/interfaces.py b/scrapy/interfaces.py index eb93c6f7e..89ad2b14f 100644 --- a/scrapy/interfaces.py +++ b/scrapy/interfaces.py @@ -16,7 +16,3 @@ class ISpiderLoader(Interface): def find_by_request(request): """Return the list of spiders names that can handle the given request""" - -# ISpiderManager is deprecated, don't use it! -# An alias is kept for backwards compatibility. -ISpiderManager = ISpiderLoader diff --git a/scrapy/spidermanager.py b/scrapy/spidermanager.py deleted file mode 100644 index 220257bb1..000000000 --- a/scrapy/spidermanager.py +++ /dev/null @@ -1,7 +0,0 @@ -""" -Backwards compatibility shim. Use scrapy.spiderloader instead. -""" -from scrapy.spiderloader import SpiderLoader -from scrapy.utils.deprecate import create_deprecated_class - -SpiderManager = create_deprecated_class('SpiderManager', SpiderLoader) diff --git a/scrapy/utils/deprecate.py b/scrapy/utils/deprecate.py index 8c72cc556..2d3db431d 100644 --- a/scrapy/utils/deprecate.py +++ b/scrapy/utils/deprecate.py @@ -125,7 +125,6 @@ def _clspath(cls, forced=None): DEPRECATION_RULES = [ ('scrapy.telnet.', 'scrapy.extensions.telnet.'), - ('scrapy.spidermanager.SpiderManager', 'scrapy.spiderloader.SpiderLoader'), ] From 722e1afcdb337bf11652167f02435c81fc68ecfb Mon Sep 17 00:00:00 2001 From: Konstantin Lopuhin Date: Mon, 9 Jul 2018 12:21:19 +0300 Subject: [PATCH 051/889] Update ancient pytest on python 3 2.9 gives collection errors on python 3.7 due to PEP 479. --- tests/requirements-py3.txt | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/tests/requirements-py3.txt b/tests/requirements-py3.txt index 51a25f5e5..8d9ce5231 100644 --- a/tests/requirements-py3.txt +++ b/tests/requirements-py3.txt @@ -1,6 +1,6 @@ -pytest==2.9.2 +pytest==3.6.3 pytest-twisted -pytest-cov==2.2.1 +pytest-cov==2.5.1 testfixtures jmespath leveldb From 17e9914b8a12e5a96cc40016b74f301fb9835cbf Mon Sep 17 00:00:00 2001 From: Konstantin Lopuhin Date: Mon, 9 Jul 2018 12:26:09 +0300 Subject: [PATCH 052/889] Catch SyntaxError as well when importing manhole Also give a more detailed reason why telnet is not enabled (for the future). --- requirements-py3.txt | 2 +- scrapy/extensions/telnet.py | 5 +++-- 2 files changed, 4 insertions(+), 3 deletions(-) diff --git a/requirements-py3.txt b/requirements-py3.txt index b941fd867..b38c4cc09 100644 --- a/requirements-py3.txt +++ b/requirements-py3.txt @@ -1,4 +1,4 @@ -git+https://github.com/lopuhin/twisted.git@9384-remove-async-param +Twisted>=17.9.0 lxml>=3.2.4 pyOpenSSL>=0.13.1 cssselect>=0.9 diff --git a/scrapy/extensions/telnet.py b/scrapy/extensions/telnet.py index e78afa1fc..7cc8f823a 100644 --- a/scrapy/extensions/telnet.py +++ b/scrapy/extensions/telnet.py @@ -12,7 +12,7 @@ try: from twisted.conch import manhole, telnet from twisted.conch.insults import insults TWISTED_CONCH_AVAILABLE = True -except ImportError: +except (ImportError, SyntaxError): TWISTED_CONCH_AVAILABLE = False from scrapy.exceptions import NotConfigured @@ -40,7 +40,8 @@ class TelnetConsole(protocol.ServerFactory): if not crawler.settings.getbool('TELNETCONSOLE_ENABLED'): raise NotConfigured if not TWISTED_CONCH_AVAILABLE: - raise NotConfigured + raise NotConfigured('TelnetConsole not enabled: failed to import ' + 'required twisted modules.') self.crawler = crawler self.noisy = False self.portrange = [int(x) for x in crawler.settings.getlist('TELNETCONSOLE_PORT')] From cf9399acc149cf5eafb2d00d310416ab2ba185e5 Mon Sep 17 00:00:00 2001 From: Konstantin Lopuhin Date: Mon, 9 Jul 2018 12:26:56 +0300 Subject: [PATCH 053/889] Use python 3.7 on travis --- .travis.yml | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/.travis.yml b/.travis.yml index 29f9f0065..f6ea670ae 100644 --- a/.travis.yml +++ b/.travis.yml @@ -23,7 +23,7 @@ matrix: env: TOXENV=py36 - python: 3.6 env: TOXENV=docs - - python: 3.7-dev + - python: 3.7 env: TOXENV=py37 install: - | From 2773fe09e4b4fac51dbc06725f1fafb2e5d9a271 Mon Sep 17 00:00:00 2001 From: Konstantin Lopuhin Date: Mon, 9 Jul 2018 12:36:58 +0300 Subject: [PATCH 054/889] Make "docs" the last build, even though it still uses python3.6 for now --- .travis.yml | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/.travis.yml b/.travis.yml index f6ea670ae..88c72b08e 100644 --- a/.travis.yml +++ b/.travis.yml @@ -21,10 +21,10 @@ matrix: env: TOXENV=py35 - python: 3.6 env: TOXENV=py36 - - python: 3.6 - env: TOXENV=docs - python: 3.7 env: TOXENV=py37 + - python: 3.6 + env: TOXENV=docs install: - | if [ "$TOXENV" = "pypy" ]; then From f4f39057cbbfa4daf66f82061e57101b88d88d05 Mon Sep 17 00:00:00 2001 From: Konstantin Lopuhin Date: Mon, 9 Jul 2018 12:46:45 +0300 Subject: [PATCH 055/889] Make csviter work on python 3.7 PEP 479 does not allow for StopIteration in generators. Instead, handle it explicitly, also use a for loop which looks simpler. --- scrapy/utils/iterators.py | 15 ++++++++++----- 1 file changed, 10 insertions(+), 5 deletions(-) diff --git a/scrapy/utils/iterators.py b/scrapy/utils/iterators.py index 73857b410..a12e14005 100644 --- a/scrapy/utils/iterators.py +++ b/scrapy/utils/iterators.py @@ -98,8 +98,9 @@ def csviter(obj, delimiter=None, headers=None, encoding=None, quotechar=None): """ encoding = obj.encoding if isinstance(obj, TextResponse) else encoding or 'utf-8' - def _getrow(csv_r): - return [to_unicode(field, encoding) for field in next(csv_r)] + + def row_to_unicode(row_): + return [to_unicode(field, encoding) for field in row_] # Python 3 csv reader input object needs to return strings if six.PY3: @@ -113,10 +114,14 @@ def csviter(obj, delimiter=None, headers=None, encoding=None, quotechar=None): csv_r = csv.reader(lines, **kwargs) if not headers: - headers = _getrow(csv_r) + try: + row = next(csv_r) + except StopIteration: + return + headers = row_to_unicode(row) - while True: - row = _getrow(csv_r) + for row in csv_r: + row = row_to_unicode(row) if len(row) != len(headers): logger.warning("ignoring row %(csvlnum)d (length: %(csvrow)d, " "should be: %(csvheader)d)", From b3cd12dc48592fb8b1d4c6883315fe2b341ca5c2 Mon Sep 17 00:00:00 2001 From: Konstantin Lopuhin Date: Mon, 9 Jul 2018 12:53:40 +0300 Subject: [PATCH 056/889] Try to get python3.7 by using xenial base and sudo See https://github.com/travis-ci/travis-ci/issues/9815#issuecomment-401756442 and https://github.com/travis-ci/travis-ci/issues/9815#issuecomment-402045581 --- .travis.yml | 2 ++ 1 file changed, 2 insertions(+) diff --git a/.travis.yml b/.travis.yml index 88c72b08e..4218d13bf 100644 --- a/.travis.yml +++ b/.travis.yml @@ -23,6 +23,8 @@ matrix: env: TOXENV=py36 - python: 3.7 env: TOXENV=py37 + dist: xenial + sudo: true - python: 3.6 env: TOXENV=docs install: From 92b504eae5379dadade2d78efba4e54b201cbd93 Mon Sep 17 00:00:00 2001 From: Konstantin Lopuhin Date: Mon, 9 Jul 2018 13:43:36 +0300 Subject: [PATCH 057/889] Fix telnet warnings in tests Disable telnet console if it's not available, else we'll get an extra warning about failure to enable it, and tests will fail. --- tests/test_crawler.py | 6 ++++-- tests/test_utils_log.py | 7 ++++++- 2 files changed, 10 insertions(+), 3 deletions(-) diff --git a/tests/test_crawler.py b/tests/test_crawler.py index d3b80f460..6a8e11363 100644 --- a/tests/test_crawler.py +++ b/tests/test_crawler.py @@ -1,5 +1,4 @@ import logging -import os import tempfile import warnings import unittest @@ -14,8 +13,9 @@ from scrapy.spiderloader import SpiderLoader from scrapy.utils.log import configure_logging, get_scrapy_root_handler from scrapy.utils.spider import DefaultSpider from scrapy.utils.misc import load_object -from scrapy.utils.test import get_crawler from scrapy.extensions.throttle import AutoThrottle +from scrapy.extensions import telnet + class BaseCrawlerTest(unittest.TestCase): @@ -100,6 +100,8 @@ class CrawlerLoggingTestCase(unittest.TestCase): custom_settings = { 'LOG_LEVEL': 'INFO', 'LOG_FILE': log_file.name, + # disable telnet if not available to avoid an extra warning + 'TELNETCONSOLE_ENABLED': telnet.TWISTED_CONCH_AVAILABLE, } configure_logging() diff --git a/tests/test_utils_log.py b/tests/test_utils_log.py index 45527b03b..742e04803 100644 --- a/tests/test_utils_log.py +++ b/tests/test_utils_log.py @@ -10,6 +10,7 @@ from twisted.python.failure import Failure from scrapy.utils.log import (failure_to_exc_info, TopLevelFormatter, LogCounterHandler, StreamLogger) from scrapy.utils.test import get_crawler +from scrapy.extensions import telnet class FailureToExcInfoTest(unittest.TestCase): @@ -65,10 +66,14 @@ class TopLevelFormatterTest(unittest.TestCase): class LogCounterHandlerTest(unittest.TestCase): def setUp(self): + settings = {'LOG_LEVEL': 'WARNING'} + if not telnet.TWISTED_CONCH_AVAILABLE: + # disable it to avoid the extra warning + settings['TELNETCONSOLE_ENABLED'] = False self.logger = logging.getLogger('test') self.logger.setLevel(logging.NOTSET) self.logger.propagate = False - self.crawler = get_crawler(settings_dict={'LOG_LEVEL': 'WARNING'}) + self.crawler = get_crawler(settings_dict=settings) self.handler = LogCounterHandler(self.crawler) self.logger.addHandler(self.handler) From 4f6778aa7332aecd15f7672a0852d1f49596969b Mon Sep 17 00:00:00 2001 From: nyov Date: Mon, 9 Jul 2018 17:16:31 +0000 Subject: [PATCH 058/889] Remove deprecated CrawlerSettings class and Settings attributes --- docs/news.rst | 9 +++++ scrapy/settings/__init__.py | 48 -------------------------- tests/test_settings/__init__.py | 60 +-------------------------------- 3 files changed, 10 insertions(+), 107 deletions(-) diff --git a/docs/news.rst b/docs/news.rst index 1b8d121a1..633e5c72f 100644 --- a/docs/news.rst +++ b/docs/news.rst @@ -3,6 +3,15 @@ Release notes ============= +Scrapy 1.6.0 (unreleased) +------------------------- + +Cleanups +~~~~~~~~ + +* Remove deprecated ``CrawlerSettings`` class. +* Remove deprecated ``Settings.overrides`` and ``Settings.defaults`` attributes. + Scrapy 1.5.0 (2017-12-29) ------------------------- diff --git a/scrapy/settings/__init__.py b/scrapy/settings/__init__.py index 28446a372..7d6d20164 100644 --- a/scrapy/settings/__init__.py +++ b/scrapy/settings/__init__.py @@ -6,7 +6,6 @@ from collections import MutableMapping from importlib import import_module from pprint import pformat -from scrapy.utils.deprecate import create_deprecated_class from scrapy.exceptions import ScrapyDeprecationWarning from . import default_settings @@ -405,30 +404,6 @@ class BaseSettings(MutableMapping): else: p.text(pformat(self.copy_to_dict())) - @property - def overrides(self): - warnings.warn("`Settings.overrides` attribute is deprecated and won't " - "be supported in Scrapy 0.26, use " - "`Settings.set(name, value, priority='cmdline')` instead", - category=ScrapyDeprecationWarning, stacklevel=2) - try: - o = self._overrides - except AttributeError: - self._overrides = o = _DictProxy(self, 'cmdline') - return o - - @property - def defaults(self): - warnings.warn("`Settings.defaults` attribute is deprecated and won't " - "be supported in Scrapy 0.26, use " - "`Settings.set(name, value, priority='default')` instead", - category=ScrapyDeprecationWarning, stacklevel=2) - try: - o = self._defaults - except AttributeError: - self._defaults = o = _DictProxy(self, 'default') - return o - class _DictProxy(MutableMapping): @@ -479,29 +454,6 @@ class Settings(BaseSettings): self.update(values, priority) -class CrawlerSettings(Settings): - - def __init__(self, settings_module=None, **kw): - self.settings_module = settings_module - Settings.__init__(self, **kw) - - def __getitem__(self, opt_name): - if opt_name in self.overrides: - return self.overrides[opt_name] - if self.settings_module and hasattr(self.settings_module, opt_name): - return getattr(self.settings_module, opt_name) - if opt_name in self.defaults: - return self.defaults[opt_name] - return Settings.__getitem__(self, opt_name) - - def __str__(self): - return "" % self.settings_module - -CrawlerSettings = create_deprecated_class( - 'CrawlerSettings', CrawlerSettings, - new_class_path='scrapy.settings.Settings') - - def iter_default_settings(): """Return the default settings as an iterator of (name, value) tuples""" for name in dir(default_settings): diff --git a/tests/test_settings/__init__.py b/tests/test_settings/__init__.py index 863684075..1dbacbea3 100644 --- a/tests/test_settings/__init__.py +++ b/tests/test_settings/__init__.py @@ -3,8 +3,7 @@ import unittest import warnings from scrapy.settings import (BaseSettings, Settings, SettingsAttribute, - CrawlerSettings, SETTINGS_PRIORITIES, - get_settings_priority) + SETTINGS_PRIORITIES, get_settings_priority) from tests import mock from . import default_settings @@ -341,35 +340,6 @@ class BaseSettingsTest(unittest.TestCase): self.assertTrue(frozencopy.frozen) self.assertIsNot(frozencopy, self.settings) - def test_deprecated_attribute_overrides(self): - self.settings.set('BAR', 'fuz', priority='cmdline') - with warnings.catch_warnings(record=True) as w: - self.settings.overrides['BAR'] = 'foo' - self.assertIn("Settings.overrides", str(w[0].message)) - self.assertEqual(self.settings.get('BAR'), 'foo') - self.assertEqual(self.settings.overrides.get('BAR'), 'foo') - self.assertIn('BAR', self.settings.overrides) - - self.settings.overrides.update(BAR='bus') - self.assertEqual(self.settings.get('BAR'), 'bus') - self.assertEqual(self.settings.overrides.get('BAR'), 'bus') - - self.settings.overrides.setdefault('BAR', 'fez') - self.assertEqual(self.settings.get('BAR'), 'bus') - - self.settings.overrides.setdefault('FOO', 'fez') - self.assertEqual(self.settings.get('FOO'), 'fez') - self.assertEqual(self.settings.overrides.get('FOO'), 'fez') - - def test_deprecated_attribute_defaults(self): - self.settings.set('BAR', 'fuz', priority='default') - with warnings.catch_warnings(record=True) as w: - self.settings.defaults['BAR'] = 'foo' - self.assertIn("Settings.defaults", str(w[0].message)) - self.assertEqual(self.settings.get('BAR'), 'foo') - self.assertEqual(self.settings.defaults.get('BAR'), 'foo') - self.assertIn('BAR', self.settings.defaults) - class SettingsTest(unittest.TestCase): @@ -422,33 +392,5 @@ class SettingsTest(unittest.TestCase): self.assertEqual(mydict['key'], 'val') -class CrawlerSettingsTest(unittest.TestCase): - - def test_deprecated_crawlersettings(self): - def _get_settings(settings_dict=None): - settings_module = type('SettingsModuleMock', (object,), settings_dict or {}) - return CrawlerSettings(settings_module) - - with warnings.catch_warnings(record=True) as w: - settings = _get_settings() - self.assertIn("CrawlerSettings is deprecated", str(w[0].message)) - - # test_global_defaults - self.assertEqual(settings.getint('DOWNLOAD_TIMEOUT'), 180) - - # test_defaults - settings.defaults['DOWNLOAD_TIMEOUT'] = '99' - self.assertEqual(settings.getint('DOWNLOAD_TIMEOUT'), 99) - - # test_settings_module - settings = _get_settings({'DOWNLOAD_TIMEOUT': '3'}) - self.assertEqual(settings.getint('DOWNLOAD_TIMEOUT'), 3) - - # test_overrides - settings = _get_settings({'DOWNLOAD_TIMEOUT': '3'}) - settings.overrides['DOWNLOAD_TIMEOUT'] = '15' - self.assertEqual(settings.getint('DOWNLOAD_TIMEOUT'), 15) - - if __name__ == "__main__": unittest.main() From 9428a4a3aa4c679c15eb2c606de7b49ad832ee6e Mon Sep 17 00:00:00 2001 From: Konstantin Lopuhin Date: Mon, 9 Jul 2018 21:03:26 +0300 Subject: [PATCH 059/889] More visible telnet conch message Capture traceback when trying to import required twisted modules, print it in case telnet is enabled, and mention settings variable that can be used to supress the message. Thanks @kmike! --- scrapy/extensions/telnet.py | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/scrapy/extensions/telnet.py b/scrapy/extensions/telnet.py index 7cc8f823a..3024ddfaa 100644 --- a/scrapy/extensions/telnet.py +++ b/scrapy/extensions/telnet.py @@ -6,6 +6,7 @@ See documentation in docs/topics/telnetconsole.rst import pprint import logging +import traceback from twisted.internet import protocol try: @@ -13,6 +14,7 @@ try: from twisted.conch.insults import insults TWISTED_CONCH_AVAILABLE = True except (ImportError, SyntaxError): + _TWISTED_CONCH_TRACEBACK = traceback.format_exc() TWISTED_CONCH_AVAILABLE = False from scrapy.exceptions import NotConfigured @@ -40,8 +42,9 @@ class TelnetConsole(protocol.ServerFactory): if not crawler.settings.getbool('TELNETCONSOLE_ENABLED'): raise NotConfigured if not TWISTED_CONCH_AVAILABLE: - raise NotConfigured('TelnetConsole not enabled: failed to import ' - 'required twisted modules.') + raise NotConfigured( + 'TELNETCONSOLE_ENABLED setting is True but required twisted ' + 'modules failed to import:\n' + _TWISTED_CONCH_TRACEBACK) self.crawler = crawler self.noisy = False self.portrange = [int(x) for x in crawler.settings.getlist('TELNETCONSOLE_PORT')] From c86213317daf25aec04f3afc69c327a43033987f Mon Sep 17 00:00:00 2001 From: Mikhail Korobov Date: Thu, 12 Jul 2018 02:10:24 +0500 Subject: [PATCH 060/889] 1.5.1 release notes --- docs/news.rst | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/docs/news.rst b/docs/news.rst index 633e5c72f..01016e2e6 100644 --- a/docs/news.rst +++ b/docs/news.rst @@ -12,6 +12,22 @@ Cleanups * Remove deprecated ``CrawlerSettings`` class. * Remove deprecated ``Settings.overrides`` and ``Settings.defaults`` attributes. + +Scrapy 1.5.1 (2018-07-12) +------------------------- + +This is a maintenance release with important bug fixes, but no new features: + +* ``O(N^2)`` gzip decompression issue which affected Python 3 and PyPy + is fixed (:issue:`3281`); +* skipping of TLS validation errors is improved (:issue:`3166`); +* Ctrl-C handling is fixed in Python 3.5+ (:issue:`3096`); +* testing fixes (:issue:`3092`, :issue:`3263`); +* documentation improvements (:issue:`3058`, :issue:`3059`, :issue:`3089`, + :issue:`3123`, :issue:`3127`, :issue:`3189`, :issue:`3224`, :issue:`3280`, + :issue:`3279`, :issue:`3201`, :issue:`3260`, :issue:`3284`, :issue:`3298`, + :issue:`3294`). + Scrapy 1.5.0 (2017-12-29) ------------------------- From c61e8a617f1291bfcbe56d54a2f80f8fb79b7ddb Mon Sep 17 00:00:00 2001 From: Valdir Stumm Junior Date: Fri, 13 Jul 2018 11:55:16 -0700 Subject: [PATCH 061/889] [doc] update default RETRY_HTTP_CODES --- docs/topics/downloader-middleware.rst | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/docs/topics/downloader-middleware.rst b/docs/topics/downloader-middleware.rst index dfe4c13b4..8dbe249fa 100644 --- a/docs/topics/downloader-middleware.rst +++ b/docs/topics/downloader-middleware.rst @@ -882,7 +882,7 @@ precedence over the :setting:`RETRY_TIMES` setting. RETRY_HTTP_CODES ^^^^^^^^^^^^^^^^ -Default: ``[500, 502, 503, 504, 408]`` +Default: ``[500, 502, 503, 504, 522, 524, 408]`` Which HTTP response codes to retry. Other errors (DNS lookup issues, connections lost, etc) are always retried. From e7e18db179f2e45aa38a5bbdb0abba7d983cdce7 Mon Sep 17 00:00:00 2001 From: Eugenio Lacuesta Date: Wed, 11 Jul 2018 14:04:35 -0300 Subject: [PATCH 062/889] Fix tests --- tests/test_spidermiddleware.py | 57 +++++++++++++++++++--------------- 1 file changed, 32 insertions(+), 25 deletions(-) diff --git a/tests/test_spidermiddleware.py b/tests/test_spidermiddleware.py index 2565ef7af..5622c3179 100644 --- a/tests/test_spidermiddleware.py +++ b/tests/test_spidermiddleware.py @@ -8,10 +8,7 @@ from twisted.internet import defer from scrapy import Spider, Request from scrapy.utils.test import get_crawler from tests.mockserver import MockServer - - -# TEST_URL = 'http://example.org' -TEST_URL = 'http://localhost:8998' +from tests.spiders import MockServerSpider class LogExceptionMiddleware: @@ -21,16 +18,18 @@ class LogExceptionMiddleware: # ================================================================================ -# recover from an exception on a spider callback +# (0) recover from an exception on a spider callback class RecoverySpider(Spider): name = 'RecoverySpider' - start_urls = [TEST_URL] custom_settings = { 'SPIDER_MIDDLEWARES': { __name__ + '.RecoveryMiddleware': 10, }, } + def start_requests(self): + yield Request(self.mockserver.url('/status?n=200')) + def parse(self, response): yield {'test': 1} self.logger.warn('DONT_FAIL: %s', response.meta.get('dont_fail')) @@ -61,10 +60,11 @@ class ProcessSpiderInputSpider(Spider): } def start_requests(self): - yield Request(TEST_URL, callback=self.parse, errback=self.errback) + yield Request(url=self.mockserver.url('/status?n=200'), + callback=self.parse, errback=self.errback) def parse(self, response): - return [{'test': 1}, {'test': 2}] + return {'from': 'callback'} def errback(self, failure): self.logger.warn('Got a Failure on the Request errback') @@ -80,13 +80,15 @@ class FailProcessSpiderInputMiddleware: # (2) exceptions from a spider callback (generator) class GeneratorCallbackSpider(Spider): name = 'GeneratorCallbackSpider' - start_urls = [TEST_URL] custom_settings = { 'SPIDER_MIDDLEWARES': { __name__ + '.LogExceptionMiddleware': 10, }, } + def start_requests(self): + yield Request(self.mockserver.url('/status?n=200')) + def parse(self, response): yield {'test': 1} yield {'test': 2} @@ -97,13 +99,15 @@ class GeneratorCallbackSpider(Spider): # (3) exceptions from a spider callback (not a generator) class NotAGeneratorCallbackSpider(Spider): name = 'NotAGeneratorCallbackSpider' - start_urls = [TEST_URL] custom_settings = { 'SPIDER_MIDDLEWARES': { __name__ + '.LogExceptionMiddleware': 10, }, } + def start_requests(self): + yield Request(self.mockserver.url('/status?n=200')) + def parse(self, response): return [{'test': 1}, {'test': 1/0}] @@ -123,20 +127,20 @@ class TestSpiderMiddleware(TestCase): def crawl_log(self, spider): crawler = get_crawler(spider) with LogCapture() as log: - yield crawler.crawl() + yield crawler.crawl(mockserver=self.mockserver) raise defer.returnValue(log) - # @defer.inlineCallbacks - # def test_recovery(self): - # """ - # Recover from an exception from a spider's callback. The final item count should be 3 - # (one from the spider before raising the exception, one from the middleware and one - # from the spider when processing the response that was enqueued from the middleware) - # """ - # log = yield self.crawl_log(RecoverySpider) - # self.assertIn("Middleware: ModuleNotFoundError exception caught", str(log)) - # self.assertEqual(str(log).count("Middleware: ModuleNotFoundError exception caught"), 1) - # self.assertIn("'item_scraped_count': 3", str(log)) + @defer.inlineCallbacks + def test_recovery(self): + """ + (0) Recover from an exception in a spider callback. The final item count should be 2 + (one directly from the recovery middleware and one from the spider when processing + the request that was enqueued from the recovery middleware) + """ + log = yield self.crawl_log(RecoverySpider) + self.assertIn("Middleware: ModuleNotFoundError exception caught", str(log)) + self.assertEqual(str(log).count("Middleware: ModuleNotFoundError exception caught"), 1) + self.assertIn("'item_scraped_count': 2", str(log)) @defer.inlineCallbacks def test_process_spider_input_errback(self): @@ -148,21 +152,24 @@ class TestSpiderMiddleware(TestCase): self.assertNotIn("Middleware: IndexError exception caught", str(log1)) self.assertIn("Middleware: will raise IndexError", str(log1)) self.assertIn("Got a Failure on the Request errback", str(log1)) + self.assertIn("{'from': 'errback'}", str(log1)) + self.assertNotIn("{'from': 'callback'}", str(log1)) + self.assertIn("'item_scraped_count': 1", str(log1)) @defer.inlineCallbacks def test_generator_callback(self): """ - (2) An exception from a spider's callback should + (2) An exception from a spider callback (returning a generator) should be caught by the process_spider_exception chain """ log2 = yield self.crawl_log(GeneratorCallbackSpider) self.assertIn("Middleware: ImportError exception caught", str(log2)) - self.assertIn("'item_scraped_count': 2", str(log2)) + self.assertNotIn("item_scraped_count", str(log2)) @defer.inlineCallbacks def test_not_a_generator_callback(self): """ - (3) An exception from a spider's callback should + (3) An exception from a spider callback (returning a list) should be caught by the process_spider_exception chain """ log3 = yield self.crawl_log(NotAGeneratorCallbackSpider) From 0c579b5276f502832f375be316094b4244cf87c5 Mon Sep 17 00:00:00 2001 From: Eugenio Lacuesta Date: Sat, 14 Jul 2018 19:58:42 -0300 Subject: [PATCH 063/889] Untested experiment --- scrapy/core/spidermw.py | 37 +++++++++++++++++++++++++++++++------ 1 file changed, 31 insertions(+), 6 deletions(-) diff --git a/scrapy/core/spidermw.py b/scrapy/core/spidermw.py index c9dd8c91e..a9aeb6dcc 100644 --- a/scrapy/core/spidermw.py +++ b/scrapy/core/spidermw.py @@ -3,6 +3,8 @@ Spider Middleware manager See documentation in docs/topics/spider-middleware.rst """ +from itertools import chain + import six from twisted.python.failure import Failure from scrapy.exceptions import _InvalidOutput @@ -10,9 +12,28 @@ from scrapy.middleware import MiddlewareManager from scrapy.utils.defer import mustbe_deferred from scrapy.utils.conf import build_component_list + def _isiterable(possible_iterator): return hasattr(possible_iterator, '__iter__') + +class MutableChain: + def __init__(self, *args): + self.data = chain(*args) + + def extend(self, iterable): + self.data = chain(self.data, iterable) + + def __iter__(self): + return self.data.__iter__() + + def __next__(self): # py3 + return self.data.__next__() + + def next(self): # py2 + return self.data.next() + + class SpiderMiddlewareManager(MiddlewareManager): component_name = 'spider middleware' @@ -68,28 +89,32 @@ class SpiderMiddlewareManager(MiddlewareManager): return _failure def process_spider_output(result, index): - def wrapper(result_iterable): + # items in this iterable do not need to go through the process_spider_output + # chain, they went through it already from the process_spider_exception method + recovered = MutableChain() + + def evaluate_result(result_iterable, index): try: for r in result_iterable: yield r except Exception as ex: - # process the exception with the method from the next middleware exception_result = process_spider_exception(Failure(ex), index) if exception_result is None or isinstance(exception_result, Failure): raise - for output in exception_result: - yield output + recovered.extend(exception_result) + for i, method in enumerate(self.methods['process_spider_output']): if i < index or method is None: continue result = method(response=response, result=result, spider=spider) index += 1 if _isiterable(result): - result = wrapper(result) + result = evaluate_result(result, index) else: raise _InvalidOutput('Middleware {} must return an iterable, got {}' \ .format(fname(method), type(result))) - return result + + return chain(result, recovered) dfd = mustbe_deferred(process_spider_input, response) dfd.addErrback(process_spider_exception, index=0) From c5fa0ae6bc536d6bc5370c6f3b634c33848971e5 Mon Sep 17 00:00:00 2001 From: Eugenio Lacuesta Date: Sat, 14 Jul 2018 19:58:42 -0300 Subject: [PATCH 064/889] Untested experiment --- scrapy/core/spidermw.py | 40 ++++++++++++++++++++++++++++++++++------ 1 file changed, 34 insertions(+), 6 deletions(-) diff --git a/scrapy/core/spidermw.py b/scrapy/core/spidermw.py index c9dd8c91e..8ee42c2cf 100644 --- a/scrapy/core/spidermw.py +++ b/scrapy/core/spidermw.py @@ -3,6 +3,8 @@ Spider Middleware manager See documentation in docs/topics/spider-middleware.rst """ +from itertools import chain + import six from twisted.python.failure import Failure from scrapy.exceptions import _InvalidOutput @@ -10,9 +12,31 @@ from scrapy.middleware import MiddlewareManager from scrapy.utils.defer import mustbe_deferred from scrapy.utils.conf import build_component_list + def _isiterable(possible_iterator): return hasattr(possible_iterator, '__iter__') + +class MutableChain: + """ + Thin wrapper around itertools.chain, allowing to add iterables "in-place" + """ + def __init__(self, *args): + self.data = chain(*args) + + def extend(self, *iterables): + self.data = chain(self.data, *iterables) + + def __iter__(self): + return self.data.__iter__() + + def __next__(self): # py3 + return self.data.__next__() + + def next(self): # py2 + return self.data.next() + + class SpiderMiddlewareManager(MiddlewareManager): component_name = 'spider middleware' @@ -68,28 +92,32 @@ class SpiderMiddlewareManager(MiddlewareManager): return _failure def process_spider_output(result, index): - def wrapper(result_iterable): + # items in this iterable do not need to go through the process_spider_output + # chain, they went through it already from the process_spider_exception method + recovered = MutableChain() + + def evaluate_result(result_iterable, index): try: for r in result_iterable: yield r except Exception as ex: - # process the exception with the method from the next middleware exception_result = process_spider_exception(Failure(ex), index) if exception_result is None or isinstance(exception_result, Failure): raise - for output in exception_result: - yield output + recovered.extend(exception_result) + for i, method in enumerate(self.methods['process_spider_output']): if i < index or method is None: continue result = method(response=response, result=result, spider=spider) index += 1 if _isiterable(result): - result = wrapper(result) + result = evaluate_result(result, index) else: raise _InvalidOutput('Middleware {} must return an iterable, got {}' \ .format(fname(method), type(result))) - return result + + return chain(result, recovered) dfd = mustbe_deferred(process_spider_input, response) dfd.addErrback(process_spider_exception, index=0) From cff9e8762512033da181293bab379b485aeffa66 Mon Sep 17 00:00:00 2001 From: Eugenio Lacuesta Date: Sun, 15 Jul 2018 16:21:08 -0300 Subject: [PATCH 065/889] Fix tests --- tests/test_spidermiddleware.py | 12 +++++++----- 1 file changed, 7 insertions(+), 5 deletions(-) diff --git a/tests/test_spidermiddleware.py b/tests/test_spidermiddleware.py index 5622c3179..c33eb28ca 100644 --- a/tests/test_spidermiddleware.py +++ b/tests/test_spidermiddleware.py @@ -68,6 +68,7 @@ class ProcessSpiderInputSpider(Spider): def errback(self, failure): self.logger.warn('Got a Failure on the Request errback') + return {'from': 'errback'} class FailProcessSpiderInputMiddleware: @@ -133,14 +134,15 @@ class TestSpiderMiddleware(TestCase): @defer.inlineCallbacks def test_recovery(self): """ - (0) Recover from an exception in a spider callback. The final item count should be 2 - (one directly from the recovery middleware and one from the spider when processing - the request that was enqueued from the recovery middleware) + (0) Recover from an exception in a spider callback. The final item count should be 3 + (one yielded from the callback method before the exception is raised, one directly + from the recovery middleware and one from the spider when processing the request that + was enqueued from the recovery middleware) """ log = yield self.crawl_log(RecoverySpider) self.assertIn("Middleware: ModuleNotFoundError exception caught", str(log)) self.assertEqual(str(log).count("Middleware: ModuleNotFoundError exception caught"), 1) - self.assertIn("'item_scraped_count': 2", str(log)) + self.assertIn("'item_scraped_count': 3", str(log)) @defer.inlineCallbacks def test_process_spider_input_errback(self): @@ -164,7 +166,7 @@ class TestSpiderMiddleware(TestCase): """ log2 = yield self.crawl_log(GeneratorCallbackSpider) self.assertIn("Middleware: ImportError exception caught", str(log2)) - self.assertNotIn("item_scraped_count", str(log2)) + self.assertIn("'item_scraped_count': 2", str(log2)) @defer.inlineCallbacks def test_not_a_generator_callback(self): From 60c2ef86f0c40d17219d3e3320072fb5b1ded412 Mon Sep 17 00:00:00 2001 From: Eugenio Lacuesta Date: Sun, 15 Jul 2018 16:47:55 -0300 Subject: [PATCH 066/889] Revert "Default values for OffsiteMiddleware" This reverts commit ba294351381c0dd81476603246d2cea6c31486be. --- scrapy/spidermiddlewares/offsite.py | 10 +++------- 1 file changed, 3 insertions(+), 7 deletions(-) diff --git a/scrapy/spidermiddlewares/offsite.py b/scrapy/spidermiddlewares/offsite.py index 3b7f194e4..310166cad 100644 --- a/scrapy/spidermiddlewares/offsite.py +++ b/scrapy/spidermiddlewares/offsite.py @@ -19,9 +19,6 @@ class OffsiteMiddleware(object): def __init__(self, stats): self.stats = stats - # default values - self.host_regex = re.compile('') # allow all by default - self.domains_seen = set() @classmethod def from_crawler(cls, crawler): @@ -55,7 +52,7 @@ class OffsiteMiddleware(object): """Override this method to implement a different offsite policy""" allowed_domains = getattr(spider, 'allowed_domains', None) if not allowed_domains: - return + return re.compile('') # allow all by default url_pattern = re.compile("^https?://.*$") for domain in allowed_domains: if url_pattern.match(domain): @@ -65,9 +62,8 @@ class OffsiteMiddleware(object): return re.compile(regex) def spider_opened(self, spider): - host_regex = self.get_host_regex(spider) - if host_regex: - self.host_regex = host_regex + self.host_regex = self.get_host_regex(spider) + self.domains_seen = set() class URLWarning(Warning): From b8e8922d5436247f7be66c40e1a16a0acab7986e Mon Sep 17 00:00:00 2001 From: Eugenio Lacuesta Date: Sun, 15 Jul 2018 17:50:55 -0300 Subject: [PATCH 067/889] Simplify stuff. Add more tests. --- scrapy/core/spidermw.py | 10 +++--- tests/test_spidermiddleware.py | 63 ++++++++++++++++++++++++++++++++-- 2 files changed, 66 insertions(+), 7 deletions(-) diff --git a/scrapy/core/spidermw.py b/scrapy/core/spidermw.py index 8ee42c2cf..c733402b9 100644 --- a/scrapy/core/spidermw.py +++ b/scrapy/core/spidermw.py @@ -75,8 +75,8 @@ class SpiderMiddlewareManager(MiddlewareManager): # don't handle _InvalidOutput exception if isinstance(exception, _InvalidOutput): return _failure - for i, method in enumerate(self.methods['process_spider_exception']): - if i < index or method is None: + for method in self.methods['process_spider_exception'][index:]: + if method is None: continue result = method(response=response, exception=exception, spider=spider) index += 1 @@ -101,13 +101,13 @@ class SpiderMiddlewareManager(MiddlewareManager): for r in result_iterable: yield r except Exception as ex: - exception_result = process_spider_exception(Failure(ex), index) + exception_result = process_spider_exception(Failure(ex), index+1) if exception_result is None or isinstance(exception_result, Failure): raise recovered.extend(exception_result) - for i, method in enumerate(self.methods['process_spider_output']): - if i < index or method is None: + for method in self.methods['process_spider_output'][index:]: + if method is None: continue result = method(response=response, result=result, spider=spider) index += 1 diff --git a/tests/test_spidermiddleware.py b/tests/test_spidermiddleware.py index c33eb28ca..645d95059 100644 --- a/tests/test_spidermiddleware.py +++ b/tests/test_spidermiddleware.py @@ -113,6 +113,49 @@ class NotAGeneratorCallbackSpider(Spider): return [{'test': 1}, {'test': 1/0}] +# ================================================================================ +# (4) exceptions from a middleware process_spider_output method (generator) +class GeneratorOutputChainSpider(Spider): + name = 'GeneratorOutputChainSpider' + custom_settings = { + 'SPIDER_MIDDLEWARES': { + __name__ + '.GeneratorFailOutputChainMiddleware': 10, + __name__ + '.GeneratorRecoverOutputChainMiddleware': 5, + }, + } + + def start_requests(self): + yield Request(self.mockserver.url('/status?n=200')) + + def parse(self, response): + yield {'processed': ['parse']} + + +class GeneratorFailOutputChainMiddleware: + def process_spider_output(self, response, result, spider): + for r in result: + r['processed'].append('{}.process_spider_output'.format(self.__class__.__name__)) + yield r + raise LookupError() + + def process_spider_exception(self, response, exception, spider): + method = '{}.process_spider_exception'.format(self.__class__.__name__) + logging.info('%s: %s caught', method, exception.__class__.__name__) + yield {'processed': [method]} + + +class GeneratorRecoverOutputChainMiddleware: + def process_spider_output(self, response, result, spider): + for r in result: + r['processed'].append('{}.process_spider_output'.format(self.__class__.__name__)) + yield r + + def process_spider_exception(self, response, exception, spider): + method = '{}.process_spider_exception'.format(self.__class__.__name__) + logging.info('%s: %s caught', method, exception.__class__.__name__) + yield {'processed': [method]} + + # ================================================================================ class TestSpiderMiddleware(TestCase): @classmethod @@ -162,7 +205,8 @@ class TestSpiderMiddleware(TestCase): def test_generator_callback(self): """ (2) An exception from a spider callback (returning a generator) should - be caught by the process_spider_exception chain + be caught by the process_spider_exception chain. Items yielded before the + exception is raised should be processed normally. """ log2 = yield self.crawl_log(GeneratorCallbackSpider) self.assertIn("Middleware: ImportError exception caught", str(log2)) @@ -172,8 +216,23 @@ class TestSpiderMiddleware(TestCase): def test_not_a_generator_callback(self): """ (3) An exception from a spider callback (returning a list) should - be caught by the process_spider_exception chain + be caught by the process_spider_exception chain. No items should be processed. """ log3 = yield self.crawl_log(NotAGeneratorCallbackSpider) self.assertIn("Middleware: ZeroDivisionError exception caught", str(log3)) self.assertNotIn("item_scraped_count", str(log3)) + + @defer.inlineCallbacks + def test_generator_output_chain(self): + """ + (4) An exception from a middleware's process_spider_output method should be sent + to the process_spider_exception method from the next middleware in the chain. + The final item count should be 2 (one from the spider callback and one from the + process_spider_exception chain) + """ + log4 = yield self.crawl_log(GeneratorOutputChainSpider) + self.assertIn("'item_scraped_count': 2", str(log4)) + self.assertIn("GeneratorRecoverOutputChainMiddleware.process_spider_exception: LookupError caught", str(log4)) + self.assertNotIn("GeneratorFailOutputChainMiddleware.process_spider_exception: LookupError caught", str(log4)) + self.assertIn("{'processed': ['parse', 'GeneratorFailOutputChainMiddleware.process_spider_output', 'GeneratorRecoverOutputChainMiddleware.process_spider_output']}", str(log4)) + self.assertIn("{'processed': ['GeneratorRecoverOutputChainMiddleware.process_spider_exception']}", str(log4)) From 56e92d90fda3e812aca270327e513391591a10cc Mon Sep 17 00:00:00 2001 From: Eugenio Lacuesta Date: Tue, 17 Jul 2018 15:15:38 -0300 Subject: [PATCH 068/889] Update tests --- tests/test_spidermiddleware.py | 54 ++++++++++++++++++++++++++++------ 1 file changed, 45 insertions(+), 9 deletions(-) diff --git a/tests/test_spidermiddleware.py b/tests/test_spidermiddleware.py index 645d95059..9bb7f62fd 100644 --- a/tests/test_spidermiddleware.py +++ b/tests/test_spidermiddleware.py @@ -119,8 +119,10 @@ class GeneratorOutputChainSpider(Spider): name = 'GeneratorOutputChainSpider' custom_settings = { 'SPIDER_MIDDLEWARES': { - __name__ + '.GeneratorFailOutputChainMiddleware': 10, - __name__ + '.GeneratorRecoverOutputChainMiddleware': 5, + __name__ + '.GeneratorFailMiddleware': 10, + __name__ + '.GeneratorDoNothingAfterFailureMiddleware': 8, + __name__ + '.GeneratorRecoverMiddleware': 5, + __name__ + '.GeneratorDoNothingAfterRecoveryMiddleware': 3, }, } @@ -128,10 +130,23 @@ class GeneratorOutputChainSpider(Spider): yield Request(self.mockserver.url('/status?n=200')) def parse(self, response): - yield {'processed': ['parse']} + yield {'processed': ['parse-first-item']} + yield {'processed': ['parse-second-item']} -class GeneratorFailOutputChainMiddleware: +class _GeneratorDoNothingMiddleware: + def process_spider_output(self, response, result, spider): + for r in result: + r['processed'].append('{}.process_spider_output'.format(self.__class__.__name__)) + yield r + + def process_spider_exception(self, response, exception, spider): + method = '{}.process_spider_exception'.format(self.__class__.__name__) + logging.info('%s: %s caught', method, exception.__class__.__name__) + return None + + +class GeneratorFailMiddleware: def process_spider_output(self, response, result, spider): for r in result: r['processed'].append('{}.process_spider_output'.format(self.__class__.__name__)) @@ -144,7 +159,11 @@ class GeneratorFailOutputChainMiddleware: yield {'processed': [method]} -class GeneratorRecoverOutputChainMiddleware: +class GeneratorDoNothingAfterFailureMiddleware(_GeneratorDoNothingMiddleware): + pass + + +class GeneratorRecoverMiddleware: def process_spider_output(self, response, result, spider): for r in result: r['processed'].append('{}.process_spider_output'.format(self.__class__.__name__)) @@ -155,6 +174,9 @@ class GeneratorRecoverOutputChainMiddleware: logging.info('%s: %s caught', method, exception.__class__.__name__) yield {'processed': [method]} +class GeneratorDoNothingAfterRecoveryMiddleware(_GeneratorDoNothingMiddleware): + pass + # ================================================================================ class TestSpiderMiddleware(TestCase): @@ -227,12 +249,26 @@ class TestSpiderMiddleware(TestCase): """ (4) An exception from a middleware's process_spider_output method should be sent to the process_spider_exception method from the next middleware in the chain. + The result of the recovery by the process_spider_exception method should be handled + by the process_spider_output method from the next middleware. The final item count should be 2 (one from the spider callback and one from the process_spider_exception chain) """ log4 = yield self.crawl_log(GeneratorOutputChainSpider) self.assertIn("'item_scraped_count': 2", str(log4)) - self.assertIn("GeneratorRecoverOutputChainMiddleware.process_spider_exception: LookupError caught", str(log4)) - self.assertNotIn("GeneratorFailOutputChainMiddleware.process_spider_exception: LookupError caught", str(log4)) - self.assertIn("{'processed': ['parse', 'GeneratorFailOutputChainMiddleware.process_spider_output', 'GeneratorRecoverOutputChainMiddleware.process_spider_output']}", str(log4)) - self.assertIn("{'processed': ['GeneratorRecoverOutputChainMiddleware.process_spider_exception']}", str(log4)) + self.assertIn("GeneratorRecoverMiddleware.process_spider_exception: LookupError caught", str(log4)) + self.assertIn("GeneratorDoNothingAfterFailureMiddleware.process_spider_exception: LookupError caught", str(log4)) + self.assertNotIn("GeneratorFailMiddleware.process_spider_exception: LookupError caught", str(log4)) + self.assertNotIn("GeneratorDoNothingAfterRecoveryMiddleware.process_spider_exception: LookupError caught", str(log4)) + item_from_callback = {'processed': [ + 'parse-first-item', + 'GeneratorFailMiddleware.process_spider_output', + 'GeneratorDoNothingAfterFailureMiddleware.process_spider_output', + 'GeneratorRecoverMiddleware.process_spider_output', + 'GeneratorDoNothingAfterRecoveryMiddleware.process_spider_output']} + item_recovered = {'processed': [ + 'GeneratorRecoverMiddleware.process_spider_exception', + 'GeneratorDoNothingAfterRecoveryMiddleware.process_spider_output']} + self.assertIn(str(item_from_callback), str(log4)) + self.assertIn(str(item_recovered), str(log4)) + self.assertNotIn('parse-second-item', str(log4)) From 610f589662ca9c5929527e15cad2c347c8d5d335 Mon Sep 17 00:00:00 2001 From: Eugenio Lacuesta Date: Tue, 17 Jul 2018 19:13:03 -0300 Subject: [PATCH 069/889] Add callback and errback in the same step --- scrapy/core/spidermw.py | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) diff --git a/scrapy/core/spidermw.py b/scrapy/core/spidermw.py index c733402b9..da51bc974 100644 --- a/scrapy/core/spidermw.py +++ b/scrapy/core/spidermw.py @@ -70,7 +70,7 @@ class SpiderMiddlewareManager(MiddlewareManager): return scrape_func(Failure(), request, spider) return scrape_func(response, request, spider) - def process_spider_exception(_failure, index): + def process_spider_exception(_failure, index=0): exception = _failure.value # don't handle _InvalidOutput exception if isinstance(exception, _InvalidOutput): @@ -91,7 +91,7 @@ class SpiderMiddlewareManager(MiddlewareManager): .format(fname(method), type(result))) return _failure - def process_spider_output(result, index): + def process_spider_output(result, index=0): # items in this iterable do not need to go through the process_spider_output # chain, they went through it already from the process_spider_exception method recovered = MutableChain() @@ -120,8 +120,7 @@ class SpiderMiddlewareManager(MiddlewareManager): return chain(result, recovered) dfd = mustbe_deferred(process_spider_input, response) - dfd.addErrback(process_spider_exception, index=0) - dfd.addCallback(process_spider_output, index=0) + dfd.addCallbacks(callback=process_spider_output, errback=process_spider_exception) return dfd def process_start_requests(self, start_requests, spider): From a3af0bfd56770aab0a056ae6e29efffa8b7d88c4 Mon Sep 17 00:00:00 2001 From: Eugenio Lacuesta Date: Wed, 18 Jul 2018 15:15:55 -0300 Subject: [PATCH 070/889] More tests --- scrapy/core/spidermw.py | 21 +++++--- tests/test_spidermiddleware.py | 99 ++++++++++++++++++++++++++++++++-- 2 files changed, 110 insertions(+), 10 deletions(-) diff --git a/scrapy/core/spidermw.py b/scrapy/core/spidermw.py index da51bc974..96488806d 100644 --- a/scrapy/core/spidermw.py +++ b/scrapy/core/spidermw.py @@ -64,8 +64,8 @@ class SpiderMiddlewareManager(MiddlewareManager): try: result = method(response=response, spider=spider) if result is not None: - raise _InvalidOutput('Middleware {} must return None or raise ' \ - 'an exception, got {}'.format(fname(method), type(result))) + raise _InvalidOutput('Middleware {} must return None or raise an exception, got {}' \ + .format(fname(method), type(result))) except: return scrape_func(Failure(), request, spider) return scrape_func(response, request, spider) @@ -78,8 +78,8 @@ class SpiderMiddlewareManager(MiddlewareManager): for method in self.methods['process_spider_exception'][index:]: if method is None: continue - result = method(response=response, exception=exception, spider=spider) index += 1 + result = method(response=response, exception=exception, spider=spider) if _isiterable(result): # stop exception handling by handing control over to the # process_spider_output chain if an iterable has been returned @@ -96,9 +96,9 @@ class SpiderMiddlewareManager(MiddlewareManager): # chain, they went through it already from the process_spider_exception method recovered = MutableChain() - def evaluate_result(result_iterable, index): + def evaluate_iterable(iterable, index): try: - for r in result_iterable: + for r in iterable: yield r except Exception as ex: exception_result = process_spider_exception(Failure(ex), index+1) @@ -109,10 +109,17 @@ class SpiderMiddlewareManager(MiddlewareManager): for method in self.methods['process_spider_output'][index:]: if method is None: continue - result = method(response=response, result=result, spider=spider) index += 1 + # the following might fail directly if the output value is not a generator + try: + result = method(response=response, result=result, spider=spider) + except Exception as ex: + exception_result = process_spider_exception(Failure(ex), index+1) + if exception_result is None or isinstance(exception_result, Failure): + raise + return exception_result if _isiterable(result): - result = evaluate_result(result, index) + result = evaluate_iterable(result, index) else: raise _InvalidOutput('Middleware {} must return an iterable, got {}' \ .format(fname(method), type(result))) diff --git a/tests/test_spidermiddleware.py b/tests/test_spidermiddleware.py index 9bb7f62fd..2f431ddc7 100644 --- a/tests/test_spidermiddleware.py +++ b/tests/test_spidermiddleware.py @@ -98,8 +98,8 @@ class GeneratorCallbackSpider(Spider): # ================================================================================ # (3) exceptions from a spider callback (not a generator) -class NotAGeneratorCallbackSpider(Spider): - name = 'NotAGeneratorCallbackSpider' +class NotGeneratorCallbackSpider(Spider): + name = 'NotGeneratorCallbackSpider' custom_settings = { 'SPIDER_MIDDLEWARES': { __name__ + '.LogExceptionMiddleware': 10, @@ -178,6 +178,76 @@ class GeneratorDoNothingAfterRecoveryMiddleware(_GeneratorDoNothingMiddleware): pass +# ================================================================================ +# (5) exceptions from a middleware process_spider_output method (not generator) +class NotGeneratorOutputChainSpider(Spider): + name = 'NotGeneratorOutputChainSpider' + custom_settings = { + 'SPIDER_MIDDLEWARES': { + __name__ + '.NotGeneratorFailMiddleware': 10, + __name__ + '.NotGeneratorDoNothingAfterFailureMiddleware': 8, + __name__ + '.NotGeneratorRecoverMiddleware': 5, + __name__ + '.NotGeneratorDoNothingAfterRecoveryMiddleware': 3, + }, + } + + def start_requests(self): + return [Request(self.mockserver.url('/status?n=200'))] + + def parse(self, response): + return [{'processed': ['parse-first-item']}, {'processed': ['parse-second-item']}] + + +class _NotGeneratorDoNothingMiddleware: + def process_spider_output(self, response, result, spider): + out = [] + for r in result: + r['processed'].append('{}.process_spider_output'.format(self.__class__.__name__)) + out.append(r) + return out + + def process_spider_exception(self, response, exception, spider): + method = '{}.process_spider_exception'.format(self.__class__.__name__) + logging.info('%s: %s caught', method, exception.__class__.__name__) + return None + + +class NotGeneratorFailMiddleware: + def process_spider_output(self, response, result, spider): + out = [] + for r in result: + r['processed'].append('{}.process_spider_output'.format(self.__class__.__name__)) + out.append(r) + raise ReferenceError() + return out + + def process_spider_exception(self, response, exception, spider): + method = '{}.process_spider_exception'.format(self.__class__.__name__) + logging.info('%s: %s caught', method, exception.__class__.__name__) + return [{'processed': [method]}] + + +class NotGeneratorDoNothingAfterFailureMiddleware(_NotGeneratorDoNothingMiddleware): + pass + + +class NotGeneratorRecoverMiddleware: + def process_spider_output(self, response, result, spider): + out = [] + for r in result: + r['processed'].append('{}.process_spider_output'.format(self.__class__.__name__)) + out.append(r) + return out + + def process_spider_exception(self, response, exception, spider): + method = '{}.process_spider_exception'.format(self.__class__.__name__) + logging.info('%s: %s caught', method, exception.__class__.__name__) + return [{'processed': [method]}] + +class NotGeneratorDoNothingAfterRecoveryMiddleware(_NotGeneratorDoNothingMiddleware): + pass + + # ================================================================================ class TestSpiderMiddleware(TestCase): @classmethod @@ -240,7 +310,7 @@ class TestSpiderMiddleware(TestCase): (3) An exception from a spider callback (returning a list) should be caught by the process_spider_exception chain. No items should be processed. """ - log3 = yield self.crawl_log(NotAGeneratorCallbackSpider) + log3 = yield self.crawl_log(NotGeneratorCallbackSpider) self.assertIn("Middleware: ZeroDivisionError exception caught", str(log3)) self.assertNotIn("item_scraped_count", str(log3)) @@ -272,3 +342,26 @@ class TestSpiderMiddleware(TestCase): self.assertIn(str(item_from_callback), str(log4)) self.assertIn(str(item_recovered), str(log4)) self.assertNotIn('parse-second-item', str(log4)) + + @defer.inlineCallbacks + def test_not_a_generator_output_chain(self): + """ + (5) An exception from a middleware's process_spider_output method should be sent + to the process_spider_exception method from the next middleware in the chain. + The result of the recovery by the process_spider_exception method should be handled + by the process_spider_output method from the next middleware. + The final item count should be 1 (from the process_spider_exception chain, the items + from the spider callback are lost) + """ + log5 = yield self.crawl_log(NotGeneratorOutputChainSpider) + self.assertIn("'item_scraped_count': 1", str(log5)) + self.assertIn("GeneratorRecoverMiddleware.process_spider_exception: ReferenceError caught", str(log5)) + self.assertIn("GeneratorDoNothingAfterFailureMiddleware.process_spider_exception: ReferenceError caught", str(log5)) + self.assertNotIn("GeneratorFailMiddleware.process_spider_exception: ReferenceError caught", str(log5)) + self.assertNotIn("GeneratorDoNothingAfterRecoveryMiddleware.process_spider_exception: ReferenceError caught", str(log5)) + item_recovered = {'processed': [ + 'NotGeneratorRecoverMiddleware.process_spider_exception', + 'NotGeneratorDoNothingAfterRecoveryMiddleware.process_spider_output']} + self.assertIn(str(item_recovered), str(log5)) + self.assertNotIn('parse-first-item', str(log5)) + self.assertNotIn('parse-second-item', str(log5)) From 6329441c826bec97aeec82d3e7ec0bcd91c60a47 Mon Sep 17 00:00:00 2001 From: Eugenio Lacuesta Date: Wed, 18 Jul 2018 16:59:24 -0300 Subject: [PATCH 071/889] ModuleNotFoundError was added in py3.6 --- tests/test_spidermiddleware.py | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/tests/test_spidermiddleware.py b/tests/test_spidermiddleware.py index 2f431ddc7..0451dfd27 100644 --- a/tests/test_spidermiddleware.py +++ b/tests/test_spidermiddleware.py @@ -34,7 +34,7 @@ class RecoverySpider(Spider): yield {'test': 1} self.logger.warn('DONT_FAIL: %s', response.meta.get('dont_fail')) if not response.meta.get('dont_fail'): - raise ModuleNotFoundError() + raise TabError() class RecoveryMiddleware: def process_spider_exception(self, response, exception, spider): @@ -275,8 +275,8 @@ class TestSpiderMiddleware(TestCase): was enqueued from the recovery middleware) """ log = yield self.crawl_log(RecoverySpider) - self.assertIn("Middleware: ModuleNotFoundError exception caught", str(log)) - self.assertEqual(str(log).count("Middleware: ModuleNotFoundError exception caught"), 1) + self.assertIn("Middleware: TabError exception caught", str(log)) + self.assertEqual(str(log).count("Middleware: TabError exception caught"), 1) self.assertIn("'item_scraped_count': 3", str(log)) @defer.inlineCallbacks From 71a1406c99e7d4cced0693389e537c98a38104aa Mon Sep 17 00:00:00 2001 From: Eugenio Lacuesta Date: Wed, 18 Jul 2018 17:40:30 -0300 Subject: [PATCH 072/889] Logging changes --- tests/test_spidermiddleware.py | 24 +++++++++++------------- 1 file changed, 11 insertions(+), 13 deletions(-) diff --git a/tests/test_spidermiddleware.py b/tests/test_spidermiddleware.py index 0451dfd27..0f5646a72 100644 --- a/tests/test_spidermiddleware.py +++ b/tests/test_spidermiddleware.py @@ -1,6 +1,4 @@ -import logging - from testfixtures import LogCapture from twisted.trial.unittest import TestCase from twisted.internet import defer @@ -13,7 +11,7 @@ from tests.spiders import MockServerSpider class LogExceptionMiddleware: def process_spider_exception(self, response, exception, spider): - logging.warn('Middleware: %s exception caught', exception.__class__.__name__) + spider.logger.info('Middleware: %s exception caught', exception.__class__.__name__) return None @@ -32,13 +30,13 @@ class RecoverySpider(Spider): def parse(self, response): yield {'test': 1} - self.logger.warn('DONT_FAIL: %s', response.meta.get('dont_fail')) + self.logger.info('DONT_FAIL: %s', response.meta.get('dont_fail')) if not response.meta.get('dont_fail'): raise TabError() class RecoveryMiddleware: def process_spider_exception(self, response, exception, spider): - logging.warn('Middleware: %s exception caught', exception.__class__.__name__) + spider.logger.info('Middleware: %s exception caught', exception.__class__.__name__) return [ {'from': 'process_spider_exception'}, Request(response.url, meta={'dont_fail': True}, dont_filter=True), @@ -67,13 +65,13 @@ class ProcessSpiderInputSpider(Spider): return {'from': 'callback'} def errback(self, failure): - self.logger.warn('Got a Failure on the Request errback') + self.logger.info('Got a Failure on the Request errback') return {'from': 'errback'} class FailProcessSpiderInputMiddleware: def process_spider_input(self, response, spider): - logging.warn('Middleware: will raise IndexError') + spider.logger.info('Middleware: will raise IndexError') raise IndexError() @@ -142,7 +140,7 @@ class _GeneratorDoNothingMiddleware: def process_spider_exception(self, response, exception, spider): method = '{}.process_spider_exception'.format(self.__class__.__name__) - logging.info('%s: %s caught', method, exception.__class__.__name__) + spider.logger.info('%s: %s caught', method, exception.__class__.__name__) return None @@ -155,7 +153,7 @@ class GeneratorFailMiddleware: def process_spider_exception(self, response, exception, spider): method = '{}.process_spider_exception'.format(self.__class__.__name__) - logging.info('%s: %s caught', method, exception.__class__.__name__) + spider.logger.info('%s: %s caught', method, exception.__class__.__name__) yield {'processed': [method]} @@ -171,7 +169,7 @@ class GeneratorRecoverMiddleware: def process_spider_exception(self, response, exception, spider): method = '{}.process_spider_exception'.format(self.__class__.__name__) - logging.info('%s: %s caught', method, exception.__class__.__name__) + spider.logger.info('%s: %s caught', method, exception.__class__.__name__) yield {'processed': [method]} class GeneratorDoNothingAfterRecoveryMiddleware(_GeneratorDoNothingMiddleware): @@ -208,7 +206,7 @@ class _NotGeneratorDoNothingMiddleware: def process_spider_exception(self, response, exception, spider): method = '{}.process_spider_exception'.format(self.__class__.__name__) - logging.info('%s: %s caught', method, exception.__class__.__name__) + spider.logger.info('%s: %s caught', method, exception.__class__.__name__) return None @@ -223,7 +221,7 @@ class NotGeneratorFailMiddleware: def process_spider_exception(self, response, exception, spider): method = '{}.process_spider_exception'.format(self.__class__.__name__) - logging.info('%s: %s caught', method, exception.__class__.__name__) + spider.logger.info('%s: %s caught', method, exception.__class__.__name__) return [{'processed': [method]}] @@ -241,7 +239,7 @@ class NotGeneratorRecoverMiddleware: def process_spider_exception(self, response, exception, spider): method = '{}.process_spider_exception'.format(self.__class__.__name__) - logging.info('%s: %s caught', method, exception.__class__.__name__) + spider.logger.info('%s: %s caught', method, exception.__class__.__name__) return [{'processed': [method]}] class NotGeneratorDoNothingAfterRecoveryMiddleware(_NotGeneratorDoNothingMiddleware): From 20defa2e16628b4b432a1cc44ad37182dfc764ee Mon Sep 17 00:00:00 2001 From: Eugenio Lacuesta Date: Thu, 19 Jul 2018 10:31:06 -0300 Subject: [PATCH 073/889] Better handling of method indexes --- scrapy/core/spidermw.py | 16 +++++++--------- 1 file changed, 7 insertions(+), 9 deletions(-) diff --git a/scrapy/core/spidermw.py b/scrapy/core/spidermw.py index 96488806d..8607ed620 100644 --- a/scrapy/core/spidermw.py +++ b/scrapy/core/spidermw.py @@ -70,20 +70,19 @@ class SpiderMiddlewareManager(MiddlewareManager): return scrape_func(Failure(), request, spider) return scrape_func(response, request, spider) - def process_spider_exception(_failure, index=0): + def process_spider_exception(_failure, start_index=0): exception = _failure.value # don't handle _InvalidOutput exception if isinstance(exception, _InvalidOutput): return _failure - for method in self.methods['process_spider_exception'][index:]: + for method_index, method in enumerate(self.methods['process_spider_exception'][start_index:], start=start_index): if method is None: continue - index += 1 result = method(response=response, exception=exception, spider=spider) if _isiterable(result): # stop exception handling by handing control over to the # process_spider_output chain if an iterable has been returned - return process_spider_output(result, index) + return process_spider_output(result, method_index+1) elif result is None: continue else: @@ -91,7 +90,7 @@ class SpiderMiddlewareManager(MiddlewareManager): .format(fname(method), type(result))) return _failure - def process_spider_output(result, index=0): + def process_spider_output(result, start_index=0): # items in this iterable do not need to go through the process_spider_output # chain, they went through it already from the process_spider_exception method recovered = MutableChain() @@ -106,20 +105,19 @@ class SpiderMiddlewareManager(MiddlewareManager): raise recovered.extend(exception_result) - for method in self.methods['process_spider_output'][index:]: + for method_index, method in enumerate(self.methods['process_spider_output'][start_index:], start=start_index): if method is None: continue - index += 1 # the following might fail directly if the output value is not a generator try: result = method(response=response, result=result, spider=spider) except Exception as ex: - exception_result = process_spider_exception(Failure(ex), index+1) + exception_result = process_spider_exception(Failure(ex), method_index+1) if exception_result is None or isinstance(exception_result, Failure): raise return exception_result if _isiterable(result): - result = evaluate_iterable(result, index) + result = evaluate_iterable(result, method_index) else: raise _InvalidOutput('Middleware {} must return an iterable, got {}' \ .format(fname(method), type(result))) From 6a38fc39f8fd1344bc41fcf50fe0e0af27ec74c4 Mon Sep 17 00:00:00 2001 From: Eugenio Lacuesta Date: Thu, 19 Jul 2018 11:56:23 -0300 Subject: [PATCH 074/889] Include flags when copying requests --- scrapy/http/request/__init__.py | 2 +- tests/test_http_request.py | 7 ++++++- 2 files changed, 7 insertions(+), 2 deletions(-) diff --git a/scrapy/http/request/__init__.py b/scrapy/http/request/__init__.py index 13a92ffa0..cd4360483 100644 --- a/scrapy/http/request/__init__.py +++ b/scrapy/http/request/__init__.py @@ -91,7 +91,7 @@ class Request(object_ref): """Create a new Request with the same attributes except for those given new values. """ - for x in ['url', 'method', 'headers', 'body', 'cookies', 'meta', + for x in ['url', 'method', 'headers', 'body', 'cookies', 'meta', 'flags', 'encoding', 'priority', 'dont_filter', 'callback', 'errback']: kwargs.setdefault(x, getattr(self, x)) cls = kwargs.pop('cls', self.__class__) diff --git a/tests/test_http_request.py b/tests/test_http_request.py index a042f03b6..fc89229c6 100644 --- a/tests/test_http_request.py +++ b/tests/test_http_request.py @@ -174,7 +174,8 @@ class RequestTest(unittest.TestCase): def somecallback(): pass - r1 = self.request_class("http://www.example.com", callback=somecallback, errback=somecallback) + r1 = self.request_class("http://www.example.com", flags=['f1', 'f2'], + callback=somecallback, errback=somecallback) r1.meta['foo'] = 'bar' r2 = r1.copy() @@ -184,6 +185,10 @@ class RequestTest(unittest.TestCase): assert r2.callback is r1.callback assert r2.errback is r2.errback + # make sure flags list is shallow copied + assert r1.flags is not r2.flags, "flags must be a shallow copy, not identical" + self.assertEqual(r1.flags, r2.flags) + # make sure meta dict is shallow copied assert r1.meta is not r2.meta, "meta must be a shallow copy, not identical" self.assertEqual(r1.meta, r2.meta) From 7020c3e4523ef445f0d279cdb85fc7570d9e2c2e Mon Sep 17 00:00:00 2001 From: Andrei Korigodski Date: Fri, 20 Jul 2018 14:46:57 +0300 Subject: [PATCH 075/889] Doc: update copyright notice The years are updated. The hyphen is replaced with an en dash. --- docs/conf.py | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/docs/conf.py b/docs/conf.py index 594740f39..a54a6bbe9 100644 --- a/docs/conf.py +++ b/docs/conf.py @@ -45,7 +45,7 @@ master_doc = 'index' # General information about the project. project = u'Scrapy' -copyright = u'2008-2016, Scrapy developers' +copyright = u'2008–2018, Scrapy developers' # The version info for the project you're documenting, acts as replacement for # |version| and |release|, also used in various other places throughout the From 98d74d1083be6afa7553a5950f89fc5ac446272f Mon Sep 17 00:00:00 2001 From: Eugenio Lacuesta Date: Fri, 20 Jul 2018 12:08:49 -0300 Subject: [PATCH 076/889] Requested changes --- scrapy/extensions/feedexport.py | 29 +++++++++++++++-------------- scrapy/utils/misc.py | 1 + tests/test_feedexport.py | 4 +++- 3 files changed, 19 insertions(+), 15 deletions(-) diff --git a/scrapy/extensions/feedexport.py b/scrapy/extensions/feedexport.py index 067887d94..7c7db387e 100644 --- a/scrapy/extensions/feedexport.py +++ b/scrapy/extensions/feedexport.py @@ -96,21 +96,22 @@ class S3FeedStorage(BlockingFeedStorage): def __init__(self, uri, access_key=None, secret_key=None): # BEGIN Backwards compatibility for initialising without keys (and # without using from_crawler) - from scrapy.conf import settings no_defaults = access_key is None and secret_key is None - if no_defaults and ('AWS_ACCESS_KEY_ID' in settings or - 'AWS_SECRET_ACCESS_KEY' in settings): - import warnings - from scrapy.exceptions import ScrapyDeprecationWarning - warnings.warn( - "Initialising `scrapy.extensions.feedexport.S3FeedStorage` " - "without AWS keys is deprecated. Please supply credentials or " - "use the `from_crawler()` constructor.", - category=ScrapyDeprecationWarning, - stacklevel=2 - ) - access_key = settings['AWS_ACCESS_KEY_ID'] - secret_key = settings['AWS_SECRET_ACCESS_KEY'] + if no_defaults: + from scrapy.conf import settings + if 'AWS_ACCESS_KEY_ID' in settings or 'AWS_SECRET_ACCESS_KEY' in settings: + import warnings + from scrapy.exceptions import ScrapyDeprecationWarning + warnings.warn( + "Initialising `scrapy.extensions.feedexport.S3FeedStorage` " + "without AWS keys is deprecated. Please supply credentials or " + "use the `from_crawler()` constructor.", + category=ScrapyDeprecationWarning, + stacklevel=2 + ) + access_key = settings['AWS_ACCESS_KEY_ID'] + secret_key = settings['AWS_SECRET_ACCESS_KEY'] + # END Backwards compatibility u = urlparse(uri) self.bucketname = u.hostname self.access_key = u.username or access_key diff --git a/scrapy/utils/misc.py b/scrapy/utils/misc.py index 8eb1aabb5..5ccfdcd72 100644 --- a/scrapy/utils/misc.py +++ b/scrapy/utils/misc.py @@ -118,6 +118,7 @@ def rel_has_nofollow(rel): """Return True if link rel attribute has nofollow type""" return True if rel is not None and 'nofollow' in rel.split() else False + def create_instance(objcls, settings, crawler, *args, **kwargs): """Construct a class instance using its ``from_crawler`` or ``from_settings`` constructors, if available. diff --git a/tests/test_feedexport.py b/tests/test_feedexport.py index eeb1bc2a4..380ed971b 100644 --- a/tests/test_feedexport.py +++ b/tests/test_feedexport.py @@ -173,7 +173,9 @@ class S3FeedStorageTest(unittest.TestCase): uri = os.environ.get('S3_TEST_FILE_URI') if not uri: raise unittest.SkipTest("No S3 URI available for testing") - storage = S3FeedStorage(uri, Settings()) + access_key = os.environ.get('AWS_ACCESS_KEY_ID') + secret_key = os.environ.get('AWS_SECRET_ACCESS_KEY') + storage = S3FeedStorage(uri, access_key, secret_key) verifyObject(IFeedStorage, storage) file = storage.open(scrapy.Spider("default")) expected_content = b"content: \xe2\x98\x83" From 784eed113021a1a787787a354add242e7abbf6f9 Mon Sep 17 00:00:00 2001 From: Eugenio Lacuesta Date: Fri, 20 Jul 2018 19:08:46 -0300 Subject: [PATCH 077/889] Improve test coverage (downloader middleware) --- scrapy/core/downloader/middleware.py | 6 +-- tests/test_downloadermiddleware.py | 64 ++++++++++++++++++++++++++++ 2 files changed, 66 insertions(+), 4 deletions(-) diff --git a/scrapy/core/downloader/middleware.py b/scrapy/core/downloader/middleware.py index cf0c1f869..2fa277e7d 100644 --- a/scrapy/core/downloader/middleware.py +++ b/scrapy/core/downloader/middleware.py @@ -50,8 +50,7 @@ class DownloaderMiddlewareManager(MiddlewareManager): defer.returnValue(response) for method in self.methods['process_response']: - response = yield method(request=request, response=response, - spider=spider) + response = yield method(request=request, response=response, spider=spider) if not isinstance(response, (Response, Request)): raise _InvalidOutput('Middleware %s.process_response must return Response or Request, got %s' % \ (six.get_method_self(method).__class__.__name__, type(response))) @@ -63,8 +62,7 @@ class DownloaderMiddlewareManager(MiddlewareManager): def process_exception(_failure): exception = _failure.value for method in self.methods['process_exception']: - response = yield method(request=request, exception=exception, - spider=spider) + response = yield method(request=request, exception=exception, spider=spider) if response is not None and not isinstance(response, (Response, Request)): raise _InvalidOutput('Middleware %s.process_exception must return None, Response or Request, got %s' % \ (six.get_method_self(method).__class__.__name__, type(response))) diff --git a/tests/test_downloadermiddleware.py b/tests/test_downloadermiddleware.py index fb51392b2..0f420b70d 100644 --- a/tests/test_downloadermiddleware.py +++ b/tests/test_downloadermiddleware.py @@ -3,6 +3,7 @@ from twisted.python.failure import Failure from scrapy.http import Request, Response from scrapy.spiders import Spider +from scrapy.exceptions import _InvalidOutput from scrapy.core.downloader.middleware import DownloaderMiddlewareManager from scrapy.utils.test import get_crawler from scrapy.utils.python import to_bytes @@ -115,3 +116,66 @@ class ResponseFromProcessRequestTest(ManagerTestCase): self.assertIs(results[0], resp) self.assertFalse(download_func.called) + + +class ProcessRequestInvalidOutput(ManagerTestCase): + """Invalid return value for process_request method should raise an exception""" + + def test_invalid_process_request(self): + req = Request('http://example.com/index.html') + resp = Response('http://example.com/index.html') + + class InvalidProcessRequestMiddleware: + def process_request(self, request, spider): + return 1 + + self.mwman._add_middleware(InvalidProcessRequestMiddleware()) + download_func = mock.MagicMock() + dfd = self.mwman.download(download_func, req, self.spider) + results = [] + dfd.addBoth(results.append) + self.assertIsInstance(results[0], Failure) + self.assertIsInstance(results[0].value, _InvalidOutput) + + +class ProcessResponseInvalidOutput(ManagerTestCase): + """Invalid return value for process_response method should raise an exception""" + + def test_invalid_process_response(self): + req = Request('http://example.com/index.html') + resp = Response('http://example.com/index.html') + + class InvalidProcessResponseMiddleware: + def process_response(self, request, response, spider): + return 1 + + self.mwman._add_middleware(InvalidProcessResponseMiddleware()) + download_func = mock.MagicMock() + dfd = self.mwman.download(download_func, req, self.spider) + results = [] + dfd.addBoth(results.append) + self.assertIsInstance(results[0], Failure) + self.assertIsInstance(results[0].value, _InvalidOutput) + + +class ProcessExceptionInvalidOutput(ManagerTestCase): + """Invalid return value for process_exception method should raise an exception""" + + def test_invalid_process_exception(self): + req = Request('http://example.com/index.html') + resp = Response('http://example.com/index.html') + + class InvalidProcessExceptionMiddleware: + def process_request(self, request, spider): + raise Exception() + + def process_exception(self, request, exception, spider): + return 1 + + self.mwman._add_middleware(InvalidProcessExceptionMiddleware()) + download_func = mock.MagicMock() + dfd = self.mwman.download(download_func, req, self.spider) + results = [] + dfd.addBoth(results.append) + self.assertIsInstance(results[0], Failure) + self.assertIsInstance(results[0].value, _InvalidOutput) From 48866457b309ebb5edfe2dac8966af1c825b9d65 Mon Sep 17 00:00:00 2001 From: Malcolm Granado Ho Yong Liang Date: Wed, 25 Jul 2018 14:38:37 +0800 Subject: [PATCH 078/889] make amendments to grammer --- docs/contributing.rst | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/docs/contributing.rst b/docs/contributing.rst index 6615840f7..2369c3436 100644 --- a/docs/contributing.rst +++ b/docs/contributing.rst @@ -12,7 +12,7 @@ Contributing to Scrapy There are many ways to contribute to Scrapy. Here are some of them: * Blog about Scrapy. Tell the world how you're using Scrapy. This will help - newcomers with more examples and the Scrapy project to increase its + newcomers with more examples and will help the Scrapy project to increase its visibility. * Report bugs and request features in the `issue tracker`_, trying to follow @@ -39,7 +39,7 @@ Reporting bugs trusted Scrapy developers, and its archives are not public. Well-written bug reports are very helpful, so keep in mind the following -guidelines when reporting a new bug. +guidelines when you're going to report a new bug. * check the :ref:`FAQ ` first to see if your issue is addressed in a well-known question From 782f866572d8bf8b1673ea962ae57d7631d1d9de Mon Sep 17 00:00:00 2001 From: CCInCharge Date: Thu, 7 Jun 2018 16:39:48 -0700 Subject: [PATCH 079/889] Fix #3247: Allow scrapy.FormRequest.from_response method to handle duplicate keys --- scrapy/http/request/form.py | 11 ++++++++--- tests/test_http_request.py | 23 +++++++++++++++++++++++ 2 files changed, 31 insertions(+), 3 deletions(-) diff --git a/scrapy/http/request/form.py b/scrapy/http/request/form.py index 95b38e990..c2413b431 100644 --- a/scrapy/http/request/form.py +++ b/scrapy/http/request/form.py @@ -114,10 +114,12 @@ def _get_form(response, formname, formid, formnumber, formxpath): def _get_inputs(form, formdata, dont_click, clickdata, response): try: - formdata = dict(formdata or ()) + formdata_keys = dict(formdata or ()).keys() except (ValueError, TypeError): raise ValueError('formdata should be a dict or iterable of tuples') + if not formdata: + formdata = () inputs = form.xpath('descendant::textarea' '|descendant::select' '|descendant::input[not(@type) or @type[' @@ -128,14 +130,17 @@ def _get_inputs(form, formdata, dont_click, clickdata, response): "re": "http://exslt.org/regular-expressions"}) values = [(k, u'' if v is None else v) for k, v in (_value(e) for e in inputs) - if k and k not in formdata] + if k and k not in formdata_keys] if not dont_click: clickable = _get_clickable(clickdata, form) if clickable and clickable[0] not in formdata and not clickable[0] is None: values.append(clickable) - values.extend((k, v) for k, v in formdata.items() if v is not None) + if isinstance(formdata, dict): + formdata = formdata.items() + + values.extend((k, v) for k, v in formdata if v is not None) return values diff --git a/tests/test_http_request.py b/tests/test_http_request.py index a042f03b6..18fc6413c 100644 --- a/tests/test_http_request.py +++ b/tests/test_http_request.py @@ -401,6 +401,29 @@ class FormRequestTest(RequestTest): self.assertEqual(fs[u'test2'], [u'xxx µ']) self.assertEqual(fs[u'six'], [u'seven']) + def test_from_response_duplicate_form_key(self): + response = _buildresponse( + '
', + url='http://www.example.com') + req = self.request_class.from_response(response, + method='GET', + formdata=(('foo', 'bar'), ('foo', 'baz'))) + self.assertEqual(urlparse(req.url).hostname, 'www.example.com') + self.assertEqual(urlparse(req.url).query, 'foo=bar&foo=baz') + + def test_from_response_override_duplicate_form_key(self): + response = _buildresponse( + """
+ + +
""") + req = self.request_class.from_response( + response, + formdata=(('two', '2'), ('two', '4'))) + fs = _qs(req) + self.assertEqual(fs[b'one'], [b'1']) + self.assertEqual(fs[b'two'], [b'2', b'4']) + def test_from_response_extra_headers(self): response = _buildresponse( """
From 701cd2ff9d4be34fcf63a7410d09f425410635f9 Mon Sep 17 00:00:00 2001 From: Eugenio Lacuesta Date: Mon, 9 Oct 2017 09:42:34 -0300 Subject: [PATCH 080/889] Add from_crawler support to dupefilters --- scrapy/core/scheduler.py | 7 ++++++- tests/test_dupefilters.py | 21 +++++++++++++++++++++ 2 files changed, 27 insertions(+), 1 deletion(-) diff --git a/scrapy/core/scheduler.py b/scrapy/core/scheduler.py index a54b4daf0..faed27fd1 100644 --- a/scrapy/core/scheduler.py +++ b/scrapy/core/scheduler.py @@ -26,7 +26,12 @@ class Scheduler(object): def from_crawler(cls, crawler): settings = crawler.settings dupefilter_cls = load_object(settings['DUPEFILTER_CLASS']) - dupefilter = dupefilter_cls.from_settings(settings) + if hasattr(dupefilter_cls, 'from_crawler'): + dupefilter = dupefilter_cls.from_crawler(crawler) + elif hasattr(dupefilter_cls, 'from_settings'): + dupefilter = dupefilter_cls.from_settings(crawler.settings) + else: + dupefilter = dupefilter_cls() pqclass = load_object(settings['SCHEDULER_PRIORITY_QUEUE']) dqclass = load_object(settings['SCHEDULER_DISK_QUEUE']) mqclass = load_object(settings['SCHEDULER_MEMORY_QUEUE']) diff --git a/tests/test_dupefilters.py b/tests/test_dupefilters.py index 2d1a4bfff..81524fddd 100644 --- a/tests/test_dupefilters.py +++ b/tests/test_dupefilters.py @@ -6,10 +6,31 @@ import shutil from scrapy.dupefilters import RFPDupeFilter from scrapy.http import Request from scrapy.utils.python import to_bytes +from scrapy.utils.job import job_dir +from scrapy.utils.test import get_crawler class RFPDupeFilterTest(unittest.TestCase): + def test_dupefilter_from_crawler(self): + + class FromCrawlerRFPDupeFilter(RFPDupeFilter): + + @classmethod + def from_crawler(cls, crawler): + debug = crawler.settings.getbool('DUPEFILTER_DEBUG') + df = cls(job_dir(crawler.settings), debug) + df.user_agent = crawler.settings.get('USER_AGENT') + return df + + crawler = get_crawler(settings_dict={'DUPEFILTER_DEBUG': True, 'USER_AGENT': 'test ua'}) + dupefilter = FromCrawlerRFPDupeFilter.from_crawler(crawler) + + self.assertTrue(dupefilter.debug) + self.assertEqual(dupefilter.user_agent, 'test ua') + + dupefilter.close('finished') + def test_filter(self): dupefilter = RFPDupeFilter() dupefilter.open() From d306fe30ac08401e74fd20cf90e5164a4125d8e1 Mon Sep 17 00:00:00 2001 From: Eugenio Lacuesta Date: Sat, 30 Dec 2017 22:49:22 -0300 Subject: [PATCH 081/889] Test dupefilter creation by the Scheduler --- tests/test_dupefilters.py | 52 ++++++++++++++++++++++++++------------- 1 file changed, 35 insertions(+), 17 deletions(-) diff --git a/tests/test_dupefilters.py b/tests/test_dupefilters.py index 81524fddd..990b5141c 100644 --- a/tests/test_dupefilters.py +++ b/tests/test_dupefilters.py @@ -5,31 +5,49 @@ import shutil from scrapy.dupefilters import RFPDupeFilter from scrapy.http import Request +from scrapy.core.scheduler import Scheduler from scrapy.utils.python import to_bytes from scrapy.utils.job import job_dir from scrapy.utils.test import get_crawler +class FromCrawlerRFPDupeFilter(RFPDupeFilter): + + @classmethod + def from_crawler(cls, crawler): + debug = crawler.settings.getbool('DUPEFILTER_DEBUG') + df = cls(job_dir(crawler.settings), debug) + df.method = crawler.settings.get('METHOD') + return df + + +class FromSettingsRFPDupeFilter(RFPDupeFilter): + + @classmethod + def from_settings(cls, settings): + debug = settings.getbool('DUPEFILTER_DEBUG') + df = cls(job_dir(settings), debug) + df.method = settings.get('METHOD') + return df + + class RFPDupeFilterTest(unittest.TestCase): - def test_dupefilter_from_crawler(self): + def test_from_crawler_scheduler(self): + settings = {'DUPEFILTER_DEBUG': True, 'METHOD': 'from_crawler', + 'DUPEFILTER_CLASS': __name__ + '.FromCrawlerRFPDupeFilter'} + crawler = get_crawler(settings_dict=settings) + scheduler = Scheduler.from_crawler(crawler) + self.assertTrue(scheduler.df.debug) + self.assertEqual(scheduler.df.method, 'from_crawler') - class FromCrawlerRFPDupeFilter(RFPDupeFilter): - - @classmethod - def from_crawler(cls, crawler): - debug = crawler.settings.getbool('DUPEFILTER_DEBUG') - df = cls(job_dir(crawler.settings), debug) - df.user_agent = crawler.settings.get('USER_AGENT') - return df - - crawler = get_crawler(settings_dict={'DUPEFILTER_DEBUG': True, 'USER_AGENT': 'test ua'}) - dupefilter = FromCrawlerRFPDupeFilter.from_crawler(crawler) - - self.assertTrue(dupefilter.debug) - self.assertEqual(dupefilter.user_agent, 'test ua') - - dupefilter.close('finished') + def test_from_settings_scheduler(self): + settings = {'DUPEFILTER_DEBUG': True, 'METHOD': 'from_settings', + 'DUPEFILTER_CLASS': __name__ + '.FromSettingsRFPDupeFilter'} + crawler = get_crawler(settings_dict=settings) + scheduler = Scheduler.from_crawler(crawler) + self.assertTrue(scheduler.df.debug) + self.assertEqual(scheduler.df.method, 'from_settings') def test_filter(self): dupefilter = RFPDupeFilter() From 0089a4ab31d1764dd38c30c4448a4c62efd9b9c3 Mon Sep 17 00:00:00 2001 From: Eugenio Lacuesta Date: Fri, 23 Mar 2018 13:19:31 -0300 Subject: [PATCH 082/889] Add test for direct creation of dupefilter (no from_crawler/from_settings) --- tests/test_dupefilters.py | 24 ++++++++++++++++++------ 1 file changed, 18 insertions(+), 6 deletions(-) diff --git a/tests/test_dupefilters.py b/tests/test_dupefilters.py index 990b5141c..02a01fc94 100644 --- a/tests/test_dupefilters.py +++ b/tests/test_dupefilters.py @@ -17,7 +17,7 @@ class FromCrawlerRFPDupeFilter(RFPDupeFilter): def from_crawler(cls, crawler): debug = crawler.settings.getbool('DUPEFILTER_DEBUG') df = cls(job_dir(crawler.settings), debug) - df.method = crawler.settings.get('METHOD') + df.method = 'from_crawler' return df @@ -27,28 +27,40 @@ class FromSettingsRFPDupeFilter(RFPDupeFilter): def from_settings(cls, settings): debug = settings.getbool('DUPEFILTER_DEBUG') df = cls(job_dir(settings), debug) - df.method = settings.get('METHOD') + df.method = 'from_settings' return df +class DirectRFPDupeFilter(RFPDupeFilter): + method = 'n/a' + + class RFPDupeFilterTest(unittest.TestCase): - def test_from_crawler_scheduler(self): - settings = {'DUPEFILTER_DEBUG': True, 'METHOD': 'from_crawler', + def test_df_from_crawler_scheduler(self): + settings = {'DUPEFILTER_DEBUG': True, 'DUPEFILTER_CLASS': __name__ + '.FromCrawlerRFPDupeFilter'} crawler = get_crawler(settings_dict=settings) scheduler = Scheduler.from_crawler(crawler) self.assertTrue(scheduler.df.debug) self.assertEqual(scheduler.df.method, 'from_crawler') - def test_from_settings_scheduler(self): - settings = {'DUPEFILTER_DEBUG': True, 'METHOD': 'from_settings', + def test_df_from_settings_scheduler(self): + settings = {'DUPEFILTER_DEBUG': True, 'DUPEFILTER_CLASS': __name__ + '.FromSettingsRFPDupeFilter'} crawler = get_crawler(settings_dict=settings) scheduler = Scheduler.from_crawler(crawler) self.assertTrue(scheduler.df.debug) self.assertEqual(scheduler.df.method, 'from_settings') + def test_df_direct_scheduler(self): + settings = {'DUPEFILTER_DEBUG': True, + 'DUPEFILTER_CLASS': __name__ + '.DirectRFPDupeFilter'} + crawler = get_crawler(settings_dict=settings) + scheduler = Scheduler.from_crawler(crawler) + self.assertTrue(scheduler.df.debug) + self.assertEqual(scheduler.df.method, 'n/a') + def test_filter(self): dupefilter = RFPDupeFilter() dupefilter.open() From 9e14f8c7e4141fd5216efc378c9d003ea981a4d5 Mon Sep 17 00:00:00 2001 From: Eugenio Lacuesta Date: Fri, 23 Mar 2018 21:19:57 -0300 Subject: [PATCH 083/889] Fix test for dupefilter --- tests/test_dupefilters.py | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/tests/test_dupefilters.py b/tests/test_dupefilters.py index 02a01fc94..db69597a2 100644 --- a/tests/test_dupefilters.py +++ b/tests/test_dupefilters.py @@ -31,7 +31,7 @@ class FromSettingsRFPDupeFilter(RFPDupeFilter): return df -class DirectRFPDupeFilter(RFPDupeFilter): +class DirectDupeFilter(object): method = 'n/a' @@ -54,11 +54,9 @@ class RFPDupeFilterTest(unittest.TestCase): self.assertEqual(scheduler.df.method, 'from_settings') def test_df_direct_scheduler(self): - settings = {'DUPEFILTER_DEBUG': True, - 'DUPEFILTER_CLASS': __name__ + '.DirectRFPDupeFilter'} + settings = {'DUPEFILTER_CLASS': __name__ + '.DirectDupeFilter'} crawler = get_crawler(settings_dict=settings) scheduler = Scheduler.from_crawler(crawler) - self.assertTrue(scheduler.df.debug) self.assertEqual(scheduler.df.method, 'n/a') def test_filter(self): From 999341b60bd5289ca97c8187d0ff380a8555ba5e Mon Sep 17 00:00:00 2001 From: Eugenio Lacuesta Date: Fri, 20 Jul 2018 22:17:55 -0300 Subject: [PATCH 084/889] Simplify dupefilter creation --- scrapy/core/scheduler.py | 9 ++------- 1 file changed, 2 insertions(+), 7 deletions(-) diff --git a/scrapy/core/scheduler.py b/scrapy/core/scheduler.py index faed27fd1..eb790a67e 100644 --- a/scrapy/core/scheduler.py +++ b/scrapy/core/scheduler.py @@ -4,7 +4,7 @@ import logging from os.path import join, exists from scrapy.utils.reqser import request_to_dict, request_from_dict -from scrapy.utils.misc import load_object +from scrapy.utils.misc import load_object, create_instance from scrapy.utils.job import job_dir logger = logging.getLogger(__name__) @@ -26,12 +26,7 @@ class Scheduler(object): def from_crawler(cls, crawler): settings = crawler.settings dupefilter_cls = load_object(settings['DUPEFILTER_CLASS']) - if hasattr(dupefilter_cls, 'from_crawler'): - dupefilter = dupefilter_cls.from_crawler(crawler) - elif hasattr(dupefilter_cls, 'from_settings'): - dupefilter = dupefilter_cls.from_settings(crawler.settings) - else: - dupefilter = dupefilter_cls() + dupefilter = create_instance(dupefilter_cls, settings, crawler) pqclass = load_object(settings['SCHEDULER_PRIORITY_QUEUE']) dqclass = load_object(settings['SCHEDULER_DISK_QUEUE']) mqclass = load_object(settings['SCHEDULER_MEMORY_QUEUE']) From d6d3e87e3a4fd306829a84f934a971fd4e337a26 Mon Sep 17 00:00:00 2001 From: Eugenio Lacuesta Date: Fri, 27 Jul 2018 14:47:52 -0300 Subject: [PATCH 085/889] Rename test file --- ..._spidermiddleware.py => test_spidermiddleware_output_chain.py} | 0 1 file changed, 0 insertions(+), 0 deletions(-) rename tests/{test_spidermiddleware.py => test_spidermiddleware_output_chain.py} (100%) diff --git a/tests/test_spidermiddleware.py b/tests/test_spidermiddleware_output_chain.py similarity index 100% rename from tests/test_spidermiddleware.py rename to tests/test_spidermiddleware_output_chain.py From 801d3c07b4b7e57d50429e714a8255e7747568f4 Mon Sep 17 00:00:00 2001 From: Eugenio Lacuesta Date: Fri, 27 Jul 2018 15:06:25 -0300 Subject: [PATCH 086/889] Fix bad exception handling, add tests --- scrapy/core/spidermw.py | 2 + tests/test_spidermiddleware_invalid_values.py | 82 +++++++++++++++++++ 2 files changed, 84 insertions(+) create mode 100644 tests/test_spidermiddleware_invalid_values.py diff --git a/scrapy/core/spidermw.py b/scrapy/core/spidermw.py index 8607ed620..1b67af130 100644 --- a/scrapy/core/spidermw.py +++ b/scrapy/core/spidermw.py @@ -66,6 +66,8 @@ class SpiderMiddlewareManager(MiddlewareManager): if result is not None: raise _InvalidOutput('Middleware {} must return None or raise an exception, got {}' \ .format(fname(method), type(result))) + except _InvalidOutput: + raise except: return scrape_func(Failure(), request, spider) return scrape_func(response, request, spider) diff --git a/tests/test_spidermiddleware_invalid_values.py b/tests/test_spidermiddleware_invalid_values.py new file mode 100644 index 000000000..0d9af8951 --- /dev/null +++ b/tests/test_spidermiddleware_invalid_values.py @@ -0,0 +1,82 @@ +from twisted.trial.unittest import TestCase +from twisted.python.failure import Failure + +from scrapy.spiders import Spider +from scrapy.http import Request, Response +from scrapy.exceptions import _InvalidOutput +from scrapy.utils.test import get_crawler +from scrapy.core.spidermw import SpiderMiddlewareManager +from tests import mock + + +class SpiderMiddlewareTestCase(TestCase): + + def setUp(self): + self.request = Request('http://example.com/index.html') + self.response = Response(self.request.url, request=self.request) + self.crawler = get_crawler(Spider) + self.spider = self.crawler._create_spider('foo') + self.mwman = SpiderMiddlewareManager.from_crawler(self.crawler) + + def _scrape_response(self): + """Execute spider mw manager's scrape_response method and return the result. + Raise exception in case of failure. + """ + scrape_func = mock.MagicMock() + dfd = self.mwman.scrape_response(scrape_func, self.response, self.request, self.spider) + # catch deferred result and return the value + results = [] + dfd.addBoth(results.append) + self._wait(dfd) + ret = results[0] + return ret + + +class ProcessSpiderInputInvalidOutput(SpiderMiddlewareTestCase): + """Invalid return value for process_spider_input method""" + + def test_invalid_process_spider_input(self): + + class InvalidProcessSpiderInputMiddleware: + def process_spider_input(self, response, spider): + return 1 + + self.mwman._add_middleware(InvalidProcessSpiderInputMiddleware()) + result = self._scrape_response() + self.assertIsInstance(result, Failure) + self.assertIsInstance(result.value, _InvalidOutput) + + +class ProcessSpiderOutputInvalidOutput(SpiderMiddlewareTestCase): + """Invalid return value for process_spider_output method""" + + def test_invalid_process_spider_output(self): + + class InvalidProcessSpiderOutputMiddleware: + def process_spider_output(self, response, result, spider): + return 1 + + self.mwman._add_middleware(InvalidProcessSpiderOutputMiddleware()) + result = self._scrape_response() + self.assertIsInstance(result, Failure) + self.assertIsInstance(result.value, _InvalidOutput) + + +class ProcessSpiderExceptionInvalidOutput(SpiderMiddlewareTestCase): + """Invalid return value for process_spider_exception method""" + + def test_invalid_process_spider_exception(self): + + class InvalidProcessSpiderOutputExceptionMiddleware: + def process_spider_exception(self, response, exception, spider): + return 1 + + class RaiseExceptionProcessSpiderOutputMiddleware: + def process_spider_output(self, response, result, spider): + raise Exception() + + self.mwman._add_middleware(InvalidProcessSpiderOutputExceptionMiddleware()) + self.mwman._add_middleware(RaiseExceptionProcessSpiderOutputMiddleware()) + result = self._scrape_response() + self.assertIsInstance(result, Failure) + self.assertIsInstance(result.value, _InvalidOutput) From 980be4cb4b70c71e5502c8f31c85882540f3f078 Mon Sep 17 00:00:00 2001 From: Kevin Lloyd Bernal Date: Tue, 31 Jul 2018 19:05:04 +0800 Subject: [PATCH 087/889] provide better error message when disabling s3 exporter --- scrapy/extensions/feedexport.py | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/scrapy/extensions/feedexport.py b/scrapy/extensions/feedexport.py index 7c7db387e..22ebf3b3f 100644 --- a/scrapy/extensions/feedexport.py +++ b/scrapy/extensions/feedexport.py @@ -269,9 +269,10 @@ class FeedExporter(object): try: self._get_storage(uri) return True - except NotConfigured: - logger.error("Disabled feed storage scheme: %(scheme)s", - {'scheme': scheme}) + except NotConfigured as e: + logger.error("Disabled feed storage scheme: %(scheme)s. " + "Reason: %(reason)s", + {'scheme': scheme, 'reason': str(e)}) else: logger.error("Unknown feed storage scheme: %(scheme)s", {'scheme': scheme}) From c87a4f5c6fd97d22345bb444bc90b56ef0624aa5 Mon Sep 17 00:00:00 2001 From: Mikhail Korobov Date: Wed, 1 Aug 2018 01:45:16 +0500 Subject: [PATCH 088/889] remove unused imports from scrapy/settings/__init__.py This is a follow-up to https://github.com/scrapy/scrapy/pull/3327 --- scrapy/settings/__init__.py | 3 --- 1 file changed, 3 deletions(-) diff --git a/scrapy/settings/__init__.py b/scrapy/settings/__init__.py index 7d6d20164..14c93bef2 100644 --- a/scrapy/settings/__init__.py +++ b/scrapy/settings/__init__.py @@ -1,13 +1,10 @@ import six import json import copy -import warnings from collections import MutableMapping from importlib import import_module from pprint import pformat -from scrapy.exceptions import ScrapyDeprecationWarning - from . import default_settings From 8c55f5eb159ae85d468a89b74ffaff3e824144ab Mon Sep 17 00:00:00 2001 From: Eugenio Lacuesta Date: Fri, 3 Aug 2018 15:16:26 -0300 Subject: [PATCH 089/889] Simplify check for re-raised exception. Add tests. --- scrapy/core/spidermw.py | 4 ++-- ...lid_values.py => test_spidermiddleware.py} | 20 +++++++++++++++++++ 2 files changed, 22 insertions(+), 2 deletions(-) rename tests/{test_spidermiddleware_invalid_values.py => test_spidermiddleware.py} (79%) diff --git a/scrapy/core/spidermw.py b/scrapy/core/spidermw.py index 1b67af130..4268c91d6 100644 --- a/scrapy/core/spidermw.py +++ b/scrapy/core/spidermw.py @@ -103,7 +103,7 @@ class SpiderMiddlewareManager(MiddlewareManager): yield r except Exception as ex: exception_result = process_spider_exception(Failure(ex), index+1) - if exception_result is None or isinstance(exception_result, Failure): + if isinstance(exception_result, Failure): raise recovered.extend(exception_result) @@ -115,7 +115,7 @@ class SpiderMiddlewareManager(MiddlewareManager): result = method(response=response, result=result, spider=spider) except Exception as ex: exception_result = process_spider_exception(Failure(ex), method_index+1) - if exception_result is None or isinstance(exception_result, Failure): + if isinstance(exception_result, Failure): raise return exception_result if _isiterable(result): diff --git a/tests/test_spidermiddleware_invalid_values.py b/tests/test_spidermiddleware.py similarity index 79% rename from tests/test_spidermiddleware_invalid_values.py rename to tests/test_spidermiddleware.py index 0d9af8951..54756f2ff 100644 --- a/tests/test_spidermiddleware_invalid_values.py +++ b/tests/test_spidermiddleware.py @@ -80,3 +80,23 @@ class ProcessSpiderExceptionInvalidOutput(SpiderMiddlewareTestCase): result = self._scrape_response() self.assertIsInstance(result, Failure) self.assertIsInstance(result.value, _InvalidOutput) + + +class ProcessSpiderExceptionReRaise(SpiderMiddlewareTestCase): + """Re raise the exception by returning None""" + + def test_process_spider_exception_return_none(self): + + class ProcessSpiderOutputExceptionReturnNoneMiddleware: + def process_spider_exception(self, response, exception, spider): + return None + + class RaiseExceptionProcessSpiderOutputMiddleware: + def process_spider_output(self, response, result, spider): + 1/0 + + self.mwman._add_middleware(ProcessSpiderOutputExceptionReturnNoneMiddleware()) + self.mwman._add_middleware(RaiseExceptionProcessSpiderOutputMiddleware()) + result = self._scrape_response() + self.assertIsInstance(result, Failure) + self.assertIsInstance(result.value, ZeroDivisionError) From 40449fa0eb707bac1ae2b78f0f812372e90f17b7 Mon Sep 17 00:00:00 2001 From: Eugenio Lacuesta Date: Fri, 3 Aug 2018 18:20:25 -0300 Subject: [PATCH 090/889] Update docs, add tests, remove FIXME comment --- docs/topics/spider-middleware.rst | 3 +- scrapy/core/scraper.py | 1 - tests/test_spidermiddleware.py | 4 +- tests/test_spidermiddleware_output_chain.py | 43 ++++++++++++++------- 4 files changed, 33 insertions(+), 18 deletions(-) diff --git a/docs/topics/spider-middleware.rst b/docs/topics/spider-middleware.rst index 915833c54..7db623cf4 100644 --- a/docs/topics/spider-middleware.rst +++ b/docs/topics/spider-middleware.rst @@ -78,7 +78,8 @@ following methods: If it raises an exception, Scrapy won't bother calling any other spider middleware :meth:`process_spider_input` and will call the request - errback. The output of the errback is chained back in the other + errback if there is one, otherwise it will start the :meth:`process_spider_exception` + chain. The output of the errback is chained back in the other direction for :meth:`process_spider_output` to process it, or :meth:`process_spider_exception` if it raised an exception. diff --git a/scrapy/core/scraper.py b/scrapy/core/scraper.py index ee1e95a0c..d7fe721fb 100644 --- a/scrapy/core/scraper.py +++ b/scrapy/core/scraper.py @@ -135,7 +135,6 @@ class Scraper(object): return self.spidermw.scrape_response( self.call_spider, request_result, request, spider) else: - # FIXME: don't ignore errors in spider middleware dfd = self.call_spider(request_result, request, spider) return dfd.addErrback( self._log_download_errors, request_result, request, spider) diff --git a/tests/test_spidermiddleware.py b/tests/test_spidermiddleware.py index 54756f2ff..832fd3330 100644 --- a/tests/test_spidermiddleware.py +++ b/tests/test_spidermiddleware.py @@ -87,7 +87,7 @@ class ProcessSpiderExceptionReRaise(SpiderMiddlewareTestCase): def test_process_spider_exception_return_none(self): - class ProcessSpiderOutputExceptionReturnNoneMiddleware: + class ProcessSpiderExceptionReturnNoneMiddleware: def process_spider_exception(self, response, exception, spider): return None @@ -95,7 +95,7 @@ class ProcessSpiderExceptionReRaise(SpiderMiddlewareTestCase): def process_spider_output(self, response, result, spider): 1/0 - self.mwman._add_middleware(ProcessSpiderOutputExceptionReturnNoneMiddleware()) + self.mwman._add_middleware(ProcessSpiderExceptionReturnNoneMiddleware()) self.mwman._add_middleware(RaiseExceptionProcessSpiderOutputMiddleware()) result = self._scrape_response() self.assertIsInstance(result, Failure) diff --git a/tests/test_spidermiddleware_output_chain.py b/tests/test_spidermiddleware_output_chain.py index 0f5646a72..6f8727a15 100644 --- a/tests/test_spidermiddleware_output_chain.py +++ b/tests/test_spidermiddleware_output_chain.py @@ -45,8 +45,13 @@ class RecoveryMiddleware: # ================================================================================ # (1) exceptions from a spider middleware's process_spider_input method -class ProcessSpiderInputSpider(Spider): - name = 'ProcessSpiderInputSpider' +class FailProcessSpiderInputMiddleware: + def process_spider_input(self, response, spider): + spider.logger.info('Middleware: will raise IndexError') + raise IndexError() + +class ProcessSpiderInputSpiderWithoutErrback(Spider): + name = 'ProcessSpiderInputSpiderWithoutErrback' custom_settings = { 'SPIDER_MIDDLEWARES': { # spider @@ -58,23 +63,23 @@ class ProcessSpiderInputSpider(Spider): } def start_requests(self): - yield Request(url=self.mockserver.url('/status?n=200'), - callback=self.parse, errback=self.errback) + yield Request(url=self.mockserver.url('/status?n=200'), callback=self.parse) def parse(self, response): return {'from': 'callback'} + +class ProcessSpiderInputSpiderWithErrback(ProcessSpiderInputSpiderWithoutErrback): + name = 'ProcessSpiderInputSpiderWithErrback' + + def start_requests(self): + yield Request(url=self.mockserver.url('/status?n=200'), callback=self.parse, errback=self.errback) + def errback(self, failure): self.logger.info('Got a Failure on the Request errback') return {'from': 'errback'} -class FailProcessSpiderInputMiddleware: - def process_spider_input(self, response, spider): - spider.logger.info('Middleware: will raise IndexError') - raise IndexError() - - # ================================================================================ # (2) exceptions from a spider callback (generator) class GeneratorCallbackSpider(Spider): @@ -278,12 +283,22 @@ class TestSpiderMiddleware(TestCase): self.assertIn("'item_scraped_count': 3", str(log)) @defer.inlineCallbacks - def test_process_spider_input_errback(self): + def test_process_spider_input_without_errback(self): """ - (1) An exception from the process_spider_input chain should not be caught by the - process_spider_exception chain, it should go directly to the Request errback + (1.1) An exception from the process_spider_input chain should be caught by the + process_spider_exception chain from the start if the Request has no errback """ - log1 = yield self.crawl_log(ProcessSpiderInputSpider) + log1 = yield self.crawl_log(ProcessSpiderInputSpiderWithoutErrback) + self.assertIn("Middleware: will raise IndexError", str(log1)) + self.assertIn("Middleware: IndexError exception caught", str(log1)) + + @defer.inlineCallbacks + def test_process_spider_input_with_errback(self): + """ + (1.2) An exception from the process_spider_input chain should not be caught by the + process_spider_exception chain if the Request has an errback + """ + log1 = yield self.crawl_log(ProcessSpiderInputSpiderWithErrback) self.assertNotIn("Middleware: IndexError exception caught", str(log1)) self.assertIn("Middleware: will raise IndexError", str(log1)) self.assertIn("Got a Failure on the Request errback", str(log1)) From d3aa1e86664b02a20522abbb265dc9b91b95f111 Mon Sep 17 00:00:00 2001 From: Raphael Wuillemier Date: Mon, 6 Aug 2018 17:40:31 +0200 Subject: [PATCH 092/889] Updated tutorial.rst to include more and up-to-date beginner resources --- docs/intro/tutorial.rst | 19 +++++++++++++++---- 1 file changed, 15 insertions(+), 4 deletions(-) diff --git a/docs/intro/tutorial.rst b/docs/intro/tutorial.rst index 20538e90f..0db6a6218 100644 --- a/docs/intro/tutorial.rst +++ b/docs/intro/tutorial.rst @@ -26,15 +26,26 @@ If you're already familiar with other languages, and want to learn Python quickly, we recommend reading through `Dive Into Python 3`_. Alternatively, you can follow the `Python Tutorial`_. -If you're new to programming and want to start with Python, you may find useful -the online book `Learn Python The Hard Way`_. You can also take a look at `this -list of Python resources for non-programmers`_. +If you're new to programming and want to start with Python, the following books +may be useful to you: + +* `Automate the Boring Stuff With Python`_ + +* `How To Think Like a Computer Scientist`_ + +* `Learn Python 3 The Hard Way`_ + +You can also take a look at `this list of Python resources for non-programmers`_, +as well as the `suggested resources in the learnpython-subreddit`_. .. _Python: https://www.python.org/ .. _this list of Python resources for non-programmers: https://wiki.python.org/moin/BeginnersGuide/NonProgrammers .. _Dive Into Python 3: http://www.diveintopython3.net .. _Python Tutorial: https://docs.python.org/3/tutorial -.. _Learn Python The Hard Way: https://learnpythonthehardway.org/book/ +.. _Automate the Boring Stuff With Python: https://automatetheboringstuff.com/ +.. _How To Think Like a Computer Scientist: http://openbookproject.net/thinkcs/python/english3e/ +.. _Learn Python 3 The Hard Way: https://learnpythonthehardway.org/python3/ +.. _suggested resources in the learnpython-subreddit: https://www.reddit.com/r/learnpython/wiki/index#wiki_new_to_python.3F Creating a project From 16dad81715d3970149c0cf7a318e73a0d84be1ff Mon Sep 17 00:00:00 2001 From: Stas Glubokiy Date: Thu, 9 Aug 2018 21:07:25 +0300 Subject: [PATCH 093/889] Fix contract errback --- scrapy/contracts/__init__.py | 2 +- tests/test_contracts.py | 17 +++++++++++++++++ 2 files changed, 18 insertions(+), 1 deletion(-) diff --git a/scrapy/contracts/__init__.py b/scrapy/contracts/__init__.py index 5eaee3d11..8315d21d2 100644 --- a/scrapy/contracts/__init__.py +++ b/scrapy/contracts/__init__.py @@ -84,7 +84,7 @@ class ContractsManager(object): def eb_wrapper(failure): case = _create_testcase(method, 'errback') - exc_info = failure.value, failure.type, failure.getTracebackObject() + exc_info = failure.type, failure.value, failure.getTracebackObject() results.addError(case, exc_info) request.callback = cb_wrapper diff --git a/tests/test_contracts.py b/tests/test_contracts.py index 1cea2afb7..b07cbee1e 100644 --- a/tests/test_contracts.py +++ b/tests/test_contracts.py @@ -1,7 +1,9 @@ from unittest import TextTestResult +from twisted.python import failure from twisted.trial import unittest +from scrapy.spidermiddlewares.httperror import HttpError from scrapy.spiders import Spider from scrapy.http import Request from scrapy.item import Item, Field @@ -185,3 +187,18 @@ class ContractsManagerTest(unittest.TestCase): self.results) request.callback(response) self.should_fail() + + def test_errback(self): + spider = TestSpider() + response = ResponseMock() + + try: + raise HttpError(response, 'Ignoring non-200 response') + except HttpError: + failure_mock = failure.Failure() + + request = self.conman.from_method(spider.returns_request, self.results) + request.errback(failure_mock) + + self.assertFalse(self.results.failures) + self.assertTrue(self.results.errors) From fb7d4cbce379c4e3fac2ca89b6e0772d0c690935 Mon Sep 17 00:00:00 2001 From: Stas Glubokiy Date: Sat, 11 Aug 2018 16:08:26 +0300 Subject: [PATCH 094/889] Add error handling in contracts --- scrapy/contracts/__init__.py | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/scrapy/contracts/__init__.py b/scrapy/contracts/__init__.py index 5eaee3d11..18014e290 100644 --- a/scrapy/contracts/__init__.py +++ b/scrapy/contracts/__init__.py @@ -41,7 +41,11 @@ class ContractsManager(object): requests = [] for method in self.tested_methods_from_spidercls(type(spider)): bound_method = spider.__getattribute__(method) - requests.append(self.from_method(bound_method, results)) + try: + requests.append(self.from_method(bound_method, results)) + except: + case = _create_testcase(bound_method, 'contract') + results.addError(case, sys.exc_info()) return requests From ebbde57eca310d3c5c0f530a2e668572dde4d952 Mon Sep 17 00:00:00 2001 From: Stas Glubokiy Date: Sat, 11 Aug 2018 17:50:56 +0300 Subject: [PATCH 095/889] Add custom contracts tests --- tests/test_contracts.py | 55 +++++++++++++++++++++++++++++++++++++++-- 1 file changed, 53 insertions(+), 2 deletions(-) diff --git a/tests/test_contracts.py b/tests/test_contracts.py index 1cea2afb7..078ef6e0d 100644 --- a/tests/test_contracts.py +++ b/tests/test_contracts.py @@ -5,7 +5,7 @@ from twisted.trial import unittest from scrapy.spiders import Spider from scrapy.http import Request from scrapy.item import Item, Field -from scrapy.contracts import ContractsManager +from scrapy.contracts import ContractsManager, Contract from scrapy.contracts.default import ( UrlContract, ReturnsContract, @@ -22,6 +22,21 @@ class ResponseMock(object): url = 'http://scrapy.org' +class CustomSuccessContract(Contract): + name = 'custom_success_contract' + + def adjust_request_args(self, args): + args['url'] = 'http://scrapy.org' + return args + + +class CustomFailContract(Contract): + name = 'custom_fail_contract' + + def adjust_request_args(self, args): + raise TypeError('Error in adjust_request_args') + + class TestSpider(Spider): name = 'demo_spider' @@ -99,8 +114,34 @@ class TestSpider(Spider): pass +class CustomContractSuccessSpider(Spider): + name = 'custom_contract_success_spider' + + def parse(self, response): + """ + @custom_success_contract + """ + pass + + +class CustomContractFailSpider(Spider): + name = 'custom_contract_fail_spider' + + def parse(self, response): + """ + @custom_fail_contract + """ + pass + + class ContractsManagerTest(unittest.TestCase): - contracts = [UrlContract, ReturnsContract, ScrapesContract] + contracts = [ + UrlContract, + ReturnsContract, + ScrapesContract, + CustomSuccessContract, + CustomFailContract + ] def setUp(self): self.conman = ContractsManager(self.contracts) @@ -114,6 +155,9 @@ class ContractsManagerTest(unittest.TestCase): self.assertTrue(self.results.failures) self.assertFalse(self.results.errors) + def should_error(self): + self.assertTrue(self.results.errors) + def test_contracts(self): spider = TestSpider() @@ -185,3 +229,10 @@ class ContractsManagerTest(unittest.TestCase): self.results) request.callback(response) self.should_fail() + + def test_custom_contracts(self): + self.conman.from_spider(CustomContractSuccessSpider(), self.results) + self.should_succeed() + + self.conman.from_spider(CustomContractFailSpider(), self.results) + self.should_error() From 76220e8733b1462ecaa5db1cdd4a58ad4e93ceb3 Mon Sep 17 00:00:00 2001 From: Stas Glubokiy Date: Sat, 11 Aug 2018 18:49:12 +0300 Subject: [PATCH 096/889] Use inspect.getmembers in tested_methods_from_spidercls --- scrapy/contracts/__init__.py | 3 ++- tests/test_contracts.py | 10 ++++++++++ 2 files changed, 12 insertions(+), 1 deletion(-) diff --git a/scrapy/contracts/__init__.py b/scrapy/contracts/__init__.py index 8315d21d2..de7ac4503 100644 --- a/scrapy/contracts/__init__.py +++ b/scrapy/contracts/__init__.py @@ -1,6 +1,7 @@ import sys import re from functools import wraps +from inspect import getmembers from unittest import TestCase from scrapy.http import Request @@ -17,7 +18,7 @@ class ContractsManager(object): def tested_methods_from_spidercls(self, spidercls): methods = [] - for key, value in vars(spidercls).items(): + for key, value in getmembers(spidercls): if (callable(value) and value.__doc__ and re.search(r'^\s*@', value.__doc__, re.MULTILINE)): methods.append(key) diff --git a/tests/test_contracts.py b/tests/test_contracts.py index b07cbee1e..322d20c4c 100644 --- a/tests/test_contracts.py +++ b/tests/test_contracts.py @@ -101,6 +101,10 @@ class TestSpider(Spider): pass +class InheritsTestSpider(TestSpider): + name = 'inherits_demo_spider' + + class ContractsManagerTest(unittest.TestCase): contracts = [UrlContract, ReturnsContract, ScrapesContract] @@ -202,3 +206,9 @@ class ContractsManagerTest(unittest.TestCase): self.assertFalse(self.results.failures) self.assertTrue(self.results.errors) + + def test_inherited_contracts(self): + spider = InheritsTestSpider() + + requests = self.conman.from_spider(spider, self.results) + self.assertTrue(requests) From 8fc017d345af1e6fa53334fc9df92ebd8f9dc32e Mon Sep 17 00:00:00 2001 From: Stas Glubokiy Date: Sat, 11 Aug 2018 19:25:33 +0300 Subject: [PATCH 097/889] Add dont_filter to ContractsManager requests --- scrapy/contracts/__init__.py | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/scrapy/contracts/__init__.py b/scrapy/contracts/__init__.py index 8315d21d2..2569ab151 100644 --- a/scrapy/contracts/__init__.py +++ b/scrapy/contracts/__init__.py @@ -50,7 +50,12 @@ class ContractsManager(object): if contracts: # calculate request args args, kwargs = get_spec(Request.__init__) + + # Don't filter requests to allow + # testing different callbacks on the same URL. + kwargs['dont_filter'] = True kwargs['callback'] = method + for contract in contracts: kwargs = contract.adjust_request_args(kwargs) From b4b1e4834376e8565d727a1a5087cae31450f931 Mon Sep 17 00:00:00 2001 From: Stas Glubokiy Date: Sat, 11 Aug 2018 22:18:43 +0300 Subject: [PATCH 098/889] Add ability to use FormRequest in contracts --- docs/topics/contracts.rst | 7 +++++-- scrapy/contracts/__init__.py | 7 ++++++- tests/test_contracts.py | 26 ++++++++++++++++++++++++-- 3 files changed, 35 insertions(+), 5 deletions(-) diff --git a/docs/topics/contracts.rst b/docs/topics/contracts.rst index ba1421c42..cac52042a 100644 --- a/docs/topics/contracts.rst +++ b/docs/topics/contracts.rst @@ -86,8 +86,11 @@ override three methods: .. method:: Contract.adjust_request_args(args) This receives a ``dict`` as an argument containing default arguments - for :class:`~scrapy.http.Request` object. Must return the same or a - modified version of it. + for request object. If ``formdata`` is in ``args``, then + :class:`~scrapy.http.FormRequest` object is created, + otherwise :class:`~scrapy.http.Request` is used. + + Must return the same or a modified version of it. .. method:: Contract.pre_process(response) diff --git a/scrapy/contracts/__init__.py b/scrapy/contracts/__init__.py index 8315d21d2..ca2a8d384 100644 --- a/scrapy/contracts/__init__.py +++ b/scrapy/contracts/__init__.py @@ -3,6 +3,7 @@ import re from functools import wraps from unittest import TestCase +from scrapy import FormRequest from scrapy.http import Request from scrapy.utils.spider import iterate_spider_output from scrapy.utils.python import get_spec @@ -57,7 +58,11 @@ class ContractsManager(object): # create and prepare request args.remove('self') if set(args).issubset(set(kwargs)): - request = Request(**kwargs) + if 'formdata' in kwargs: + kwargs['method'] = 'POST' + request = FormRequest(**kwargs) + else: + request = Request(**kwargs) # execute pre and post hooks in order for contract in reversed(contracts): diff --git a/tests/test_contracts.py b/tests/test_contracts.py index b07cbee1e..f2085f711 100644 --- a/tests/test_contracts.py +++ b/tests/test_contracts.py @@ -3,11 +3,12 @@ from unittest import TextTestResult from twisted.python import failure from twisted.trial import unittest +from scrapy import FormRequest from scrapy.spidermiddlewares.httperror import HttpError from scrapy.spiders import Spider from scrapy.http import Request from scrapy.item import Item, Field -from scrapy.contracts import ContractsManager +from scrapy.contracts import ContractsManager, Contract from scrapy.contracts.default import ( UrlContract, ReturnsContract, @@ -24,6 +25,14 @@ class ResponseMock(object): url = 'http://scrapy.org' +class CustomFormContract(Contract): + name = 'custom_form' + + def adjust_request_args(self, args): + args['formdata'] = {'name': 'scrapy'} + return args + + class TestSpider(Spider): name = 'demo_spider' @@ -100,9 +109,16 @@ class TestSpider(Spider): """ pass + def custom_form(self, response): + """ + @url http://scrapy.org + @custom_form + """ + pass + class ContractsManagerTest(unittest.TestCase): - contracts = [UrlContract, ReturnsContract, ScrapesContract] + contracts = [UrlContract, ReturnsContract, ScrapesContract, CustomFormContract] def setUp(self): self.conman = ContractsManager(self.contracts) @@ -202,3 +218,9 @@ class ContractsManagerTest(unittest.TestCase): self.assertFalse(self.results.failures) self.assertTrue(self.results.errors) + + def test_form_contract(self): + spider = TestSpider() + request = self.conman.from_method(spider.custom_form, self.results) + self.assertEqual(request.method, 'POST') + self.assertIsInstance(request, FormRequest) From 1d25c98eb337763f613d73fd534d3dc5e64eb66f Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Daniel=20Gra=C3=B1a?= Date: Tue, 3 Jul 2018 16:41:53 -0300 Subject: [PATCH 099/889] Add appveyor.yml --- appveyor.yml | 14 ++++++++++++++ 1 file changed, 14 insertions(+) create mode 100644 appveyor.yml diff --git a/appveyor.yml b/appveyor.yml new file mode 100644 index 000000000..81432be39 --- /dev/null +++ b/appveyor.yml @@ -0,0 +1,14 @@ +platform: x86 +version: '{branch}-{build}' +environment: + matrix: + - PYTHON: "C:\\Python36" + TOX_ENV: py36 + +install: + - "SET PATH=%PYTHON%;%PYTHON%\\Scripts;%PATH%" + - "SET TOX_TESTENV_PASSENV=HOME USERPROFILE HOMEPATH HOMEDRIVE" + - "pip install -U tox twine wheel" +build: false +test_script: + - "tox -e %TOX_ENV%" From 4c53957f5bd0f64b00d9488f171f0f8a9620af02 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Daniel=20Gra=C3=B1a?= Date: Tue, 3 Jul 2018 16:56:05 -0300 Subject: [PATCH 100/889] Skip leveldb tests on windows --- tests/requirements-py3.txt | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tests/requirements-py3.txt b/tests/requirements-py3.txt index 8d9ce5231..1e4a4b641 100644 --- a/tests/requirements-py3.txt +++ b/tests/requirements-py3.txt @@ -3,7 +3,7 @@ pytest-twisted pytest-cov==2.5.1 testfixtures jmespath -leveldb +leveldb; sys_platform != "win32" botocore # optional for shell wrapper tests bpython From dd75297e3fb37800c0ef763003a54081e9fad4cd Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Daniel=20Gra=C3=B1a?= Date: Tue, 3 Jul 2018 16:58:02 -0300 Subject: [PATCH 101/889] Run Appveyor CI for master and release branches only, but also PRs --- appveyor.yml | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/appveyor.yml b/appveyor.yml index 81432be39..4f3c69847 100644 --- a/appveyor.yml +++ b/appveyor.yml @@ -5,6 +5,11 @@ environment: - PYTHON: "C:\\Python36" TOX_ENV: py36 +branches: + only: + - master + - /d+\.\d+\.\d+[\w\-]*$/ + install: - "SET PATH=%PYTHON%;%PYTHON%\\Scripts;%PATH%" - "SET TOX_TESTENV_PASSENV=HOME USERPROFILE HOMEPATH HOMEDRIVE" From 19ad94105f70a26ce47683d488b66fb77b79067b Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Daniel=20Gra=C3=B1a?= Date: Tue, 3 Jul 2018 17:15:48 -0300 Subject: [PATCH 102/889] pywin32 is required to run tests under windows --- tests/requirements-py3.txt | 1 + 1 file changed, 1 insertion(+) diff --git a/tests/requirements-py3.txt b/tests/requirements-py3.txt index 1e4a4b641..7c1aacd81 100644 --- a/tests/requirements-py3.txt +++ b/tests/requirements-py3.txt @@ -9,3 +9,4 @@ botocore bpython ipython brotlipy +pywin32; sys_platform == "win32" From 152fde70b12f3c6e0e73230370f79f4b4a7ea906 Mon Sep 17 00:00:00 2001 From: Jakob de Maeyer Date: Tue, 2 Feb 2016 18:23:23 +0000 Subject: [PATCH 103/889] Fix FTPTestCase by using Windows-friendly temporary file name --- tests/test_downloader_handlers.py | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff --git a/tests/test_downloader_handlers.py b/tests/test_downloader_handlers.py index c91be2c0c..fe76989f4 100644 --- a/tests/test_downloader_handlers.py +++ b/tests/test_downloader_handlers.py @@ -1,7 +1,8 @@ import os import six -import contextlib import shutil +import tempfile +import contextlib try: from unittest import mock except ImportError: @@ -913,7 +914,8 @@ class BaseFTPTestCase(unittest.TestCase): return self._add_test_callbacks(d, _test) def test_ftp_local_filename(self): - local_fname = b"/tmp/file.txt" + f, local_fname = tempfile.mkstemp() + os.close(f) meta = {"ftp_local_filename": local_fname} meta.update(self.req_meta) request = Request(url="ftp://127.0.0.1:%s/file.txt" % self.portNum, @@ -922,7 +924,8 @@ class BaseFTPTestCase(unittest.TestCase): def _test(r): self.assertEqual(r.body, local_fname) - self.assertEqual(r.headers, {b'Local Filename': [b'/tmp/file.txt'], b'Size': [b'17']}) + self.assertEqual(r.headers, {b'Local Filename': [local_fname], + b'Size': [b'17']}) self.assertTrue(os.path.exists(local_fname)) with open(local_fname, "rb") as f: self.assertEqual(f.read(), b"I have the power!") From 57a1d66c61423c85703a4008d351e9d566580810 Mon Sep 17 00:00:00 2001 From: Jakob de Maeyer Date: Wed, 3 Feb 2016 16:56:43 +0000 Subject: [PATCH 104/889] Fix test issues caused by Windows pipe buffer filling up --- tests/test_commands.py | 48 +++++++++++++++++++++--------------------- 1 file changed, 24 insertions(+), 24 deletions(-) diff --git a/tests/test_commands.py b/tests/test_commands.py index 7d9071b64..84c38c0e9 100644 --- a/tests/test_commands.py +++ b/tests/test_commands.py @@ -3,18 +3,17 @@ import os import sys import subprocess import tempfile -from time import sleep from os.path import exists, join, abspath from shutil import rmtree, copytree from tempfile import mkdtemp from contextlib import contextmanager +from threading import Timer from twisted.trial import unittest from twisted.internet import defer import scrapy from scrapy.utils.python import to_native_str -from scrapy.utils.python import retry_on_eintr from scrapy.utils.test import get_testenv from scrapy.utils.testsite import SiteTest from scrapy.utils.testproc import ProcessTest @@ -46,16 +45,18 @@ class ProjectTest(unittest.TestCase): stdout=subprocess.PIPE, stderr=subprocess.PIPE, **popen_kwargs) - waited = 0 - interval = 0.2 - while p.poll() is None: - sleep(interval) - waited += interval - if waited > 15: - p.kill() - assert False, 'Command took too much time to complete' + def kill_proc(): + p.kill() + assert False, 'Command took too much time to complete' - return p + timer = Timer(15, kill_proc) + try: + timer.start() + stdout, stderr = p.communicate() + finally: + timer.cancel() + + return to_native_str(stdout), to_native_str(stderr) class StartprojectTest(ProjectTest): @@ -111,8 +112,7 @@ class StartprojectTemplatesTest(ProjectTest): assert exists(join(self.tmpl_proj, 'root_template')) args = ['--set', 'TEMPLATES_DIR=%s' % self.tmpl] - p = self.proc('startproject', self.project_name, *args) - out = to_native_str(retry_on_eintr(p.stdout.read)) + out, err = self.proc('startproject', self.project_name, *args) self.assertIn("New Scrapy project %r, using template directory" % self.project_name, out) self.assertIn(self.tmpl_proj, out) assert exists(join(self.proj_path, 'root_template')) @@ -140,12 +140,10 @@ class GenspiderCommandTest(CommandTest): def test_template(self, tplname='crawl'): args = ['--template=%s' % tplname] if tplname else [] spname = 'test_spider' - p = self.proc('genspider', spname, 'test.com', *args) - out = to_native_str(retry_on_eintr(p.stdout.read)) + out, err = self.proc('genspider', spname, 'test.com', *args) self.assertIn("Created spider %r using template %r in module" % (spname, tplname), out) self.assertTrue(exists(join(self.proj_mod_path, 'spiders', 'test_spider.py'))) - p = self.proc('genspider', spname, 'test.com', *args) - out = to_native_str(retry_on_eintr(p.stdout.read)) + out, err = self.proc('genspider', spname, 'test.com', *args) self.assertIn("Spider %r already exists in module" % spname, out) def test_template_basic(self): @@ -212,8 +210,8 @@ class MySpider(scrapy.Spider): return self.proc('runspider', fname, *args) def get_log(self, code, name='myspider.py', args=()): - p = self.runspider(code, name=name, args=args) - return to_native_str(p.stderr.read()) + stdout, stderr = self.runspider(code, name=name, args=args) + return stderr def test_runspider(self): log = self.get_log(self.debug_log_spider) @@ -279,14 +277,17 @@ class MySpider(scrapy.Spider): self.assertIn("No spider found in file", log) def test_runspider_file_not_found(self): - p = self.proc('runspider', 'some_non_existent_file') - log = to_native_str(p.stderr.read()) + _, log = self.proc('runspider', 'some_non_existent_file') self.assertIn("File not found: some_non_existent_file", log) def test_runspider_unable_to_load(self): log = self.get_log('', name='myspider.txt') self.assertIn('Unable to load', log) + +class ParseCommandTest(ProcessTest, SiteTest, CommandTest): + command = 'parse' + def test_start_requests_errors(self): log = self.get_log(""" import scrapy @@ -304,8 +305,7 @@ class BadSpider(scrapy.Spider): class BenchCommandTest(CommandTest): def test_run(self): - p = self.proc('bench', '-s', 'LOGSTATS_INTERVAL=0.001', - '-s', 'CLOSESPIDER_TIMEOUT=0.01') - log = to_native_str(p.stderr.read()) + _, log = self.proc('bench', '-s', 'LOGSTATS_INTERVAL=0.001', + '-s', 'CLOSESPIDER_TIMEOUT=0.01') self.assertIn('INFO: Crawled', log) self.assertNotIn('Unhandled Error', log) From ed8255bde04d7e07747792022858f161c2296096 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Daniel=20Gra=C3=B1a?= Date: Fri, 6 Jul 2018 17:53:56 -0300 Subject: [PATCH 105/889] Fix merge issues with stderr/out fixes for windows buffering --- tests/test_commands.py | 18 +++++++++--------- 1 file changed, 9 insertions(+), 9 deletions(-) diff --git a/tests/test_commands.py b/tests/test_commands.py index 84c38c0e9..4963ef99c 100644 --- a/tests/test_commands.py +++ b/tests/test_commands.py @@ -56,7 +56,7 @@ class ProjectTest(unittest.TestCase): finally: timer.cancel() - return to_native_str(stdout), to_native_str(stderr) + return p, to_native_str(stdout), to_native_str(stderr) class StartprojectTest(ProjectTest): @@ -112,7 +112,7 @@ class StartprojectTemplatesTest(ProjectTest): assert exists(join(self.tmpl_proj, 'root_template')) args = ['--set', 'TEMPLATES_DIR=%s' % self.tmpl] - out, err = self.proc('startproject', self.project_name, *args) + p, out, err = self.proc('startproject', self.project_name, *args) self.assertIn("New Scrapy project %r, using template directory" % self.project_name, out) self.assertIn(self.tmpl_proj, out) assert exists(join(self.proj_path, 'root_template')) @@ -140,10 +140,10 @@ class GenspiderCommandTest(CommandTest): def test_template(self, tplname='crawl'): args = ['--template=%s' % tplname] if tplname else [] spname = 'test_spider' - out, err = self.proc('genspider', spname, 'test.com', *args) + p, out, err = self.proc('genspider', spname, 'test.com', *args) self.assertIn("Created spider %r using template %r in module" % (spname, tplname), out) self.assertTrue(exists(join(self.proj_mod_path, 'spiders', 'test_spider.py'))) - out, err = self.proc('genspider', spname, 'test.com', *args) + p, out, err = self.proc('genspider', spname, 'test.com', *args) self.assertIn("Spider %r already exists in module" % spname, out) def test_template_basic(self): @@ -210,7 +210,7 @@ class MySpider(scrapy.Spider): return self.proc('runspider', fname, *args) def get_log(self, code, name='myspider.py', args=()): - stdout, stderr = self.runspider(code, name=name, args=args) + p, stdout, stderr = self.runspider(code, name=name, args=args) return stderr def test_runspider(self): @@ -221,12 +221,12 @@ class MySpider(scrapy.Spider): self.assertIn("INFO: Spider closed (finished)", log) def test_run_fail_spider(self): - proc = self.runspider("import scrapy\n" + inspect.getsource(ExceptionSpider)) + proc, _, _ = self.runspider("import scrapy\n" + inspect.getsource(ExceptionSpider)) ret = proc.returncode self.assertNotEqual(ret, 0) def test_run_good_spider(self): - proc = self.runspider("import scrapy\n" + inspect.getsource(NoRequestsSpider)) + proc, _, _ = self.runspider("import scrapy\n" + inspect.getsource(NoRequestsSpider)) ret = proc.returncode self.assertEqual(ret, 0) @@ -277,7 +277,7 @@ class MySpider(scrapy.Spider): self.assertIn("No spider found in file", log) def test_runspider_file_not_found(self): - _, log = self.proc('runspider', 'some_non_existent_file') + _, _, log = self.proc('runspider', 'some_non_existent_file') self.assertIn("File not found: some_non_existent_file", log) def test_runspider_unable_to_load(self): @@ -305,7 +305,7 @@ class BadSpider(scrapy.Spider): class BenchCommandTest(CommandTest): def test_run(self): - _, log = self.proc('bench', '-s', 'LOGSTATS_INTERVAL=0.001', + _, _, log = self.proc('bench', '-s', 'LOGSTATS_INTERVAL=0.001', '-s', 'CLOSESPIDER_TIMEOUT=0.01') self.assertIn('INFO: Crawled', log) self.assertNotIn('Unhandled Error', log) From 034152961d187930eb659bef9e87ceb3e589c103 Mon Sep 17 00:00:00 2001 From: Jakob de Maeyer Date: Wed, 3 Feb 2016 18:12:08 +0000 Subject: [PATCH 106/889] Fix Feedexport test in Windows by using proper file URI --- tests/test_feedexport.py | 12 +++++++----- 1 file changed, 7 insertions(+), 5 deletions(-) diff --git a/tests/test_feedexport.py b/tests/test_feedexport.py index 2b57449d9..6eefa14bf 100644 --- a/tests/test_feedexport.py +++ b/tests/test_feedexport.py @@ -2,11 +2,12 @@ from __future__ import absolute_import import os import csv import json +import warnings from io import BytesIO import tempfile import shutil -from six.moves.urllib.parse import urlparse -import warnings +from six.moves.urllib.parse import urljoin, urlparse +from six.moves.urllib.request import pathname2url from zope.interface.verify import verifyObject from twisted.trial import unittest @@ -226,9 +227,10 @@ class FeedExportTest(unittest.TestCase): def run_and_export(self, spider_cls, settings=None): """ Run spider with specified settings; return exported data. """ tmpdir = tempfile.mkdtemp() - res_name = tmpdir + '/res' + res_path = os.path.join(tmpdir, 'res') + res_uri = urljoin('file:', pathname2url(res_path)) defaults = { - 'FEED_URI': 'file://' + res_name, + 'FEED_URI': res_uri, 'FEED_FORMAT': 'csv', } defaults.update(settings or {}) @@ -238,7 +240,7 @@ class FeedExportTest(unittest.TestCase): spider_cls.start_urls = [s.url('/')] yield runner.crawl(spider_cls) - with open(res_name, 'rb') as f: + with open(res_path, 'rb') as f: defer.returnValue(f.read()) finally: From 22505a34a9d0095dfc6e133bbb79d3b7aa651082 Mon Sep 17 00:00:00 2001 From: Jakob de Maeyer Date: Wed, 3 Feb 2016 18:42:51 +0000 Subject: [PATCH 107/889] Fix cmdline profiling test on Windows by using proper path composing --- tests/test_cmdline/__init__.py | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/tests/test_cmdline/__init__.py b/tests/test_cmdline/__init__.py index 10076bbca..68dfb1cca 100644 --- a/tests/test_cmdline/__init__.py +++ b/tests/test_cmdline/__init__.py @@ -52,7 +52,8 @@ class CmdlineTest(unittest.TestCase): stats.print_stats() out.seek(0) stats = out.read() - self.assertIn('scrapy/commands/version.py', stats) + self.assertIn(os.path.join('scrapy', 'commands', 'version.py'), + stats) self.assertIn('tottime', stats) finally: shutil.rmtree(path) From fb09148c91f118e3a71243e527a0d39294ba59cb Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Daniel=20Gra=C3=B1a?= Date: Fri, 6 Jul 2018 18:10:56 -0300 Subject: [PATCH 108/889] Fix bad merge on ParseCommandTest --- tests/test_commands.py | 4 ---- 1 file changed, 4 deletions(-) diff --git a/tests/test_commands.py b/tests/test_commands.py index 4963ef99c..78aa2a776 100644 --- a/tests/test_commands.py +++ b/tests/test_commands.py @@ -284,10 +284,6 @@ class MySpider(scrapy.Spider): log = self.get_log('', name='myspider.txt') self.assertIn('Unable to load', log) - -class ParseCommandTest(ProcessTest, SiteTest, CommandTest): - command = 'parse' - def test_start_requests_errors(self): log = self.get_log(""" import scrapy From a21abac743865b628e52f11882db7b7ab70e0342 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Daniel=20Gra=C3=B1a?= Date: Sat, 7 Jul 2018 10:15:20 -0300 Subject: [PATCH 109/889] fix ftp tests on windows --- tests/test_downloader_handlers.py | 1 + 1 file changed, 1 insertion(+) diff --git a/tests/test_downloader_handlers.py b/tests/test_downloader_handlers.py index fe76989f4..2f8973054 100644 --- a/tests/test_downloader_handlers.py +++ b/tests/test_downloader_handlers.py @@ -915,6 +915,7 @@ class BaseFTPTestCase(unittest.TestCase): def test_ftp_local_filename(self): f, local_fname = tempfile.mkstemp() + local_fname = to_bytes(local_fname) os.close(f) meta = {"ftp_local_filename": local_fname} meta.update(self.req_meta) From ed068e59b746de6395c33f6f0f5454e69e88d1ca Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Daniel=20Gra=C3=B1a?= Date: Sat, 7 Jul 2018 10:28:07 -0300 Subject: [PATCH 110/889] Cache pip cache and do not rebuild tags on appveyor and travis --- appveyor.yml | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/appveyor.yml b/appveyor.yml index 4f3c69847..93cfd469e 100644 --- a/appveyor.yml +++ b/appveyor.yml @@ -13,7 +13,12 @@ branches: install: - "SET PATH=%PYTHON%;%PYTHON%\\Scripts;%PATH%" - "SET TOX_TESTENV_PASSENV=HOME USERPROFILE HOMEPATH HOMEDRIVE" - - "pip install -U tox twine wheel" + - "pip install -U tox" + build: false +skip_tags: true test_script: - "tox -e %TOX_ENV%" + +cache: + - '%LOCALAPPDATA%\pip\cache' From 0e532e3dd8b4dd07b1a287d6321c1e6ae6786c64 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Daniel=20Gra=C3=B1a?= Date: Sat, 7 Jul 2018 10:46:15 -0300 Subject: [PATCH 111/889] Creating a connection to 0.0.0.0 fails on windows but not on linux nor mac --- tests/mockserver.py | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tests/mockserver.py b/tests/mockserver.py index f36ce3c44..bf62fe907 100644 --- a/tests/mockserver.py +++ b/tests/mockserver.py @@ -209,7 +209,7 @@ class MockServer(): time.sleep(0.2) def url(self, path, is_secure=False): - host = self.http_address + host = self.http_address.replace('0.0.0.0', '127.0.0.1') if is_secure: host = self.https_address return host + path From ca53a8699a8cfc2a0a3be4a65d91bada8a43f94c Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Daniel=20Gra=C3=B1a?= Date: Sat, 7 Jul 2018 11:07:05 -0300 Subject: [PATCH 112/889] Fix presentation of template directory in startproject command --- scrapy/commands/startproject.py | 4 ++-- tests/test_commands.py | 3 ++- 2 files changed, 4 insertions(+), 3 deletions(-) diff --git a/scrapy/commands/startproject.py b/scrapy/commands/startproject.py index c17aaf442..67337c26e 100644 --- a/scrapy/commands/startproject.py +++ b/scrapy/commands/startproject.py @@ -107,8 +107,8 @@ class Command(ScrapyCommand): string.Template(path).substitute(project_name=project_name)) render_templatefile(tplfile, project_name=project_name, ProjectName=string_camelcase(project_name)) - print("New Scrapy project %r, using template directory %r, created in:" % \ - (project_name, self.templates_dir)) + print("New Scrapy project '%s', using template directory '%s', " + "created in:" % (project_name, self.templates_dir)) print(" %s\n" % abspath(project_dir)) print("You can start your first spider with:") print(" cd %s" % project_dir) diff --git a/tests/test_commands.py b/tests/test_commands.py index 78aa2a776..b8445ae6c 100644 --- a/tests/test_commands.py +++ b/tests/test_commands.py @@ -113,7 +113,8 @@ class StartprojectTemplatesTest(ProjectTest): args = ['--set', 'TEMPLATES_DIR=%s' % self.tmpl] p, out, err = self.proc('startproject', self.project_name, *args) - self.assertIn("New Scrapy project %r, using template directory" % self.project_name, out) + self.assertIn("New Scrapy project '%s', using template directory" + % self.project_name, out) self.assertIn(self.tmpl_proj, out) assert exists(join(self.proj_path, 'root_template')) From cb281757500b2e114fb554aa3bf618e3a8f8eb71 Mon Sep 17 00:00:00 2001 From: Jakob de Maeyer Date: Wed, 3 Feb 2016 18:35:35 +0000 Subject: [PATCH 113/889] Fix csviter tests by explicitly using newline only --- tests/test_utils_iterators.py | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tests/test_utils_iterators.py b/tests/test_utils_iterators.py index b2e8610f8..f953076b8 100644 --- a/tests/test_utils_iterators.py +++ b/tests/test_utils_iterators.py @@ -7,7 +7,7 @@ from scrapy.utils.iterators import csviter, xmliter, _body_or_str, xmliter_lxml from scrapy.http import XmlResponse, TextResponse, Response from tests import get_testdata -FOOBAR_NL = u"foo" + os.linesep + u"bar" +FOOBAR_NL = u"foo\nbar" class XmliterTestCase(unittest.TestCase): From d93d960319e22badccd68499df11f2a728dbbc04 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Daniel=20Gra=C3=B1a?= Date: Wed, 15 Aug 2018 01:53:20 -0300 Subject: [PATCH 114/889] Fix test_utils_project under Windows --- tests/test_utils_project.py | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) diff --git a/tests/test_utils_project.py b/tests/test_utils_project.py index 7e2caace8..bd74b0c34 100644 --- a/tests/test_utils_project.py +++ b/tests/test_utils_project.py @@ -25,8 +25,12 @@ def inside_a_project(): class ProjectUtilsTest(unittest.TestCase): def test_data_path_outside_project(self): - self.assertEqual('.scrapy/somepath', data_path('somepath')) - self.assertEqual('/absolute/path', data_path('/absolute/path')) + self.assertEqual( + os.path.join('.scrapy', 'somepath'), + data_path('somepath') + ) + abspath = os.path.join(os.path.sep, 'absolute', 'path') + self.assertEqual(abspath, data_path(abspath)) def test_data_path_inside_project(self): with inside_a_project() as proj_path: @@ -35,4 +39,5 @@ class ProjectUtilsTest(unittest.TestCase): os.path.realpath(expected), os.path.realpath(data_path('somepath')) ) - self.assertEqual('/absolute/path', data_path('/absolute/path')) + abspath = os.path.join(os.path.sep, 'absolute', 'path') + self.assertEqual(abspath, data_path(abspath)) From 96517cb7de93da990f4f7dcb1cb7b7129e8c2064 Mon Sep 17 00:00:00 2001 From: Daniel Grana Date: Wed, 15 Aug 2018 01:08:40 -0700 Subject: [PATCH 115/889] Fix test_command_parse under windows --- tests/test_command_parse.py | 38 +++++++++++++++++++++---------------- 1 file changed, 22 insertions(+), 16 deletions(-) diff --git a/tests/test_command_parse.py b/tests/test_command_parse.py index 66dd17110..02037b866 100644 --- a/tests/test_command_parse.py +++ b/tests/test_command_parse.py @@ -1,3 +1,4 @@ +import os from os.path import join, abspath from twisted.trial import unittest from twisted.internet import defer @@ -7,6 +8,11 @@ from scrapy.utils.python import to_native_str from tests.test_commands import CommandTest +def _textmode(bstr): + """Normalize input the same as writing to a file + and reading from it in text mode""" + return to_native_str(bstr).replace(os.linesep, '\n') + class ParseCommandTest(ProcessTest, SiteTest, CommandTest): command = 'parse' @@ -97,7 +103,7 @@ ITEM_PIPELINES = {'%s.pipelines.MyPipeline': 1} '-a', 'test_arg=1', '-c', 'parse', self.url('/html')]) - self.assertIn("DEBUG: It Works!", to_native_str(stderr)) + self.assertIn("DEBUG: It Works!", _textmode(stderr)) @defer.inlineCallbacks def test_request_with_meta(self): @@ -106,13 +112,13 @@ ITEM_PIPELINES = {'%s.pipelines.MyPipeline': 1} '--meta', raw_json_string, '-c', 'parse_request_with_meta', self.url('/html')]) - self.assertIn("DEBUG: It Works!", to_native_str(stderr)) + self.assertIn("DEBUG: It Works!", _textmode(stderr)) _, _, stderr = yield self.execute(['--spider', self.spider_name, '-m', raw_json_string, '-c', 'parse_request_with_meta', self.url('/html')]) - self.assertIn("DEBUG: It Works!", to_native_str(stderr)) + self.assertIn("DEBUG: It Works!", _textmode(stderr)) @defer.inlineCallbacks @@ -120,7 +126,7 @@ ITEM_PIPELINES = {'%s.pipelines.MyPipeline': 1} _, _, stderr = yield self.execute(['--spider', self.spider_name, '-c', 'parse_request_without_meta', self.url('/html')]) - self.assertIn("DEBUG: It Works!", to_native_str(stderr)) + self.assertIn("DEBUG: It Works!", _textmode(stderr)) @defer.inlineCallbacks @@ -129,29 +135,29 @@ ITEM_PIPELINES = {'%s.pipelines.MyPipeline': 1} '--pipelines', '-c', 'parse', self.url('/html')]) - self.assertIn("INFO: It Works!", to_native_str(stderr)) + self.assertIn("INFO: It Works!", _textmode(stderr)) @defer.inlineCallbacks def test_parse_items(self): status, out, stderr = yield self.execute( ['--spider', self.spider_name, '-c', 'parse', self.url('/html')] ) - self.assertIn("""[{}, {'foo': 'bar'}]""", to_native_str(out)) + self.assertIn("""[{}, {'foo': 'bar'}]""", _textmode(out)) @defer.inlineCallbacks def test_parse_items_no_callback_passed(self): status, out, stderr = yield self.execute( ['--spider', self.spider_name, self.url('/html')] ) - self.assertIn("""[{}, {'foo': 'bar'}]""", to_native_str(out)) + self.assertIn("""[{}, {'foo': 'bar'}]""", _textmode(out)) @defer.inlineCallbacks def test_wrong_callback_passed(self): status, out, stderr = yield self.execute( ['--spider', self.spider_name, '-c', 'dummy', self.url('/html')] ) - self.assertRegexpMatches(to_native_str(out), """# Scraped Items -+\n\[\]""") - self.assertIn("""Cannot find callback""", to_native_str(stderr)) + self.assertRegexpMatches(_textmode(out), """# Scraped Items -+\n\[\]""") + self.assertIn("""Cannot find callback""", _textmode(stderr)) @defer.inlineCallbacks def test_crawlspider_matching_rule_callback_set(self): @@ -159,7 +165,7 @@ ITEM_PIPELINES = {'%s.pipelines.MyPipeline': 1} status, out, stderr = yield self.execute( ['--spider', 'goodcrawl'+self.spider_name, '-r', self.url('/html')] ) - self.assertIn("""[{}, {'foo': 'bar'}]""", to_native_str(out)) + self.assertIn("""[{}, {'foo': 'bar'}]""", _textmode(out)) @defer.inlineCallbacks def test_crawlspider_matching_rule_default_callback(self): @@ -167,7 +173,7 @@ ITEM_PIPELINES = {'%s.pipelines.MyPipeline': 1} status, out, stderr = yield self.execute( ['--spider', 'goodcrawl'+self.spider_name, '-r', self.url('/text')] ) - self.assertIn("""[{}, {'nomatch': 'default'}]""", to_native_str(out)) + self.assertIn("""[{}, {'nomatch': 'default'}]""", _textmode(out)) @defer.inlineCallbacks def test_spider_with_no_rules_attribute(self): @@ -175,15 +181,15 @@ ITEM_PIPELINES = {'%s.pipelines.MyPipeline': 1} status, out, stderr = yield self.execute( ['--spider', self.spider_name, '-r', self.url('/html')] ) - self.assertRegexpMatches(to_native_str(out), """# Scraped Items -+\n\[\]""") - self.assertIn("""No CrawlSpider rules found""", to_native_str(stderr)) + self.assertRegexpMatches(_textmode(out), """# Scraped Items -+\n\[\]""") + self.assertIn("""No CrawlSpider rules found""", _textmode(stderr)) @defer.inlineCallbacks def test_crawlspider_missing_callback(self): status, out, stderr = yield self.execute( ['--spider', 'badcrawl'+self.spider_name, '-r', self.url('/html')] ) - self.assertRegexpMatches(to_native_str(out), """# Scraped Items -+\n\[\]""") + self.assertRegexpMatches(_textmode(out), """# Scraped Items -+\n\[\]""") @defer.inlineCallbacks def test_crawlspider_no_matching_rule(self): @@ -191,5 +197,5 @@ ITEM_PIPELINES = {'%s.pipelines.MyPipeline': 1} status, out, stderr = yield self.execute( ['--spider', 'badcrawl'+self.spider_name, '-r', self.url('/enc-gb18030')] ) - self.assertRegexpMatches(to_native_str(out), """# Scraped Items -+\n\[\]""") - self.assertIn("""Cannot find a rule that matches""", to_native_str(stderr)) + self.assertRegexpMatches(_textmode(out), """# Scraped Items -+\n\[\]""") + self.assertIn("""Cannot find a rule that matches""", _textmode(stderr)) From e7fe243c3e6f71660620441ec6a8ca4605d4333b Mon Sep 17 00:00:00 2001 From: Daniel Grana Date: Wed, 15 Aug 2018 01:09:23 -0700 Subject: [PATCH 116/889] Fix test_crawler under windows --- tests/test_crawler.py | 46 ++++++++++++++++++++++--------------------- 1 file changed, 24 insertions(+), 22 deletions(-) diff --git a/tests/test_crawler.py b/tests/test_crawler.py index 6a8e11363..0aeb12e58 100644 --- a/tests/test_crawler.py +++ b/tests/test_crawler.py @@ -1,10 +1,9 @@ import logging import tempfile import warnings -import unittest from twisted.internet import defer -import twisted.trial.unittest +from twisted.trial import unittest import scrapy from scrapy.crawler import Crawler, CrawlerRunner, CrawlerProcess @@ -94,26 +93,29 @@ class CrawlerLoggingTestCase(unittest.TestCase): assert get_scrapy_root_handler() is None def test_spider_custom_settings_log_level(self): - with tempfile.NamedTemporaryFile() as log_file: - class MySpider(scrapy.Spider): - name = 'spider' - custom_settings = { - 'LOG_LEVEL': 'INFO', - 'LOG_FILE': log_file.name, - # disable telnet if not available to avoid an extra warning - 'TELNETCONSOLE_ENABLED': telnet.TWISTED_CONCH_AVAILABLE, - } + log_file = self.mktemp() + class MySpider(scrapy.Spider): + name = 'spider' + custom_settings = { + 'LOG_LEVEL': 'INFO', + 'LOG_FILE': log_file, + # disable telnet if not available to avoid an extra warning + 'TELNETCONSOLE_ENABLED': telnet.TWISTED_CONCH_AVAILABLE, + } + + configure_logging() + self.assertEqual(get_scrapy_root_handler().level, logging.DEBUG) + crawler = Crawler(MySpider, {}) + self.assertEqual(get_scrapy_root_handler().level, logging.INFO) + info_count = crawler.stats.get_value('log_count/INFO') + logging.debug('debug message') + logging.info('info message') + logging.warning('warning message') + logging.error('error message') + + with open(log_file, 'rb') as fo: + logged = fo.read().decode('utf8') - configure_logging() - self.assertEqual(get_scrapy_root_handler().level, logging.DEBUG) - crawler = Crawler(MySpider, {}) - self.assertEqual(get_scrapy_root_handler().level, logging.INFO) - info_count = crawler.stats.get_value('log_count/INFO') - logging.debug('debug message') - logging.info('info message') - logging.warning('warning message') - logging.error('error message') - logged = log_file.read().decode('utf8') self.assertNotIn('debug message', logged) self.assertIn('info message', logged) self.assertIn('warning message', logged) @@ -203,7 +205,7 @@ class NoRequestsSpider(scrapy.Spider): return [] -class CrawlerRunnerHasSpider(twisted.trial.unittest.TestCase): +class CrawlerRunnerHasSpider(unittest.TestCase): @defer.inlineCallbacks def test_crawler_runner_bootstrap_successful(self): From a304d6b692664f06c67fb23eb08fd985eda72e21 Mon Sep 17 00:00:00 2001 From: Daniel Grana Date: Wed, 15 Aug 2018 02:02:20 -0700 Subject: [PATCH 117/889] Workaround to pass tests/test_feedexporter.py under windows --- tests/test_feedexport.py | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) diff --git a/tests/test_feedexport.py b/tests/test_feedexport.py index 6eefa14bf..76452d450 100644 --- a/tests/test_feedexport.py +++ b/tests/test_feedexport.py @@ -241,10 +241,18 @@ class FeedExportTest(unittest.TestCase): yield runner.crawl(spider_cls) with open(res_path, 'rb') as f: - defer.returnValue(f.read()) + content = f.read() finally: - shutil.rmtree(tmpdir) + # FIXME: Windows fails to remove the file because FeedExporter + # keeps a reference to the temporal file even after + # the spider finished. + try: + shutil.rmtree(tmpdir) + except OSError: + pass + + defer.returnValue(content) @defer.inlineCallbacks def exported_data(self, items, settings): From 4eaf8690b14527d8d74ddd8103810de7c4dcdee6 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Daniel=20Gra=C3=B1a?= Date: Wed, 15 Aug 2018 08:54:18 -0300 Subject: [PATCH 118/889] Twisted's unittest.Testcase assertRaiess can't be used as context manager --- tests/test_crawler.py | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/tests/test_crawler.py b/tests/test_crawler.py index 0aeb12e58..268948a70 100644 --- a/tests/test_crawler.py +++ b/tests/test_crawler.py @@ -143,9 +143,8 @@ class CrawlerRunnerTestCase(BaseCrawlerTest): settings = Settings({ 'SPIDER_LOADER_CLASS': 'tests.test_crawler.SpiderLoaderWithWrongInterface' }) - with warnings.catch_warnings(record=True) as w, \ - self.assertRaises(AttributeError): - CrawlerRunner(settings) + with warnings.catch_warnings(record=True) as w: + self.assertRaises(AttributeError, CrawlerRunner, settings) self.assertEqual(len(w), 1) self.assertIn("SPIDER_LOADER_CLASS", str(w[0].message)) self.assertIn("scrapy.interfaces.ISpiderLoader", str(w[0].message)) From 38608bc2495189bd7de2dc48c0036df217138377 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Daniel=20Gra=C3=B1a?= Date: Wed, 15 Aug 2018 11:59:09 -0300 Subject: [PATCH 119/889] Use ignore_errors option from rmtree --- tests/test_feedexport.py | 8 +------- 1 file changed, 1 insertion(+), 7 deletions(-) diff --git a/tests/test_feedexport.py b/tests/test_feedexport.py index 76452d450..e46c8c14e 100644 --- a/tests/test_feedexport.py +++ b/tests/test_feedexport.py @@ -244,13 +244,7 @@ class FeedExportTest(unittest.TestCase): content = f.read() finally: - # FIXME: Windows fails to remove the file because FeedExporter - # keeps a reference to the temporal file even after - # the spider finished. - try: - shutil.rmtree(tmpdir) - except OSError: - pass + shutil.rmtree(tmpdir, ignore_errors=True) defer.returnValue(content) From 4de493efdd80d8ff85a78009dcc120ac46b9c55c Mon Sep 17 00:00:00 2001 From: Stas Glubokiy Date: Wed, 15 Aug 2018 20:24:00 +0300 Subject: [PATCH 120/889] Add test_same_url --- tests/test_contracts.py | 40 ++++++++++++++++++++++++++++++++++++---- 1 file changed, 36 insertions(+), 4 deletions(-) diff --git a/tests/test_contracts.py b/tests/test_contracts.py index b07cbee1e..e4f1a777b 100644 --- a/tests/test_contracts.py +++ b/tests/test_contracts.py @@ -1,8 +1,10 @@ from unittest import TextTestResult +from twisted.internet import defer from twisted.python import failure from twisted.trial import unittest +from scrapy.crawler import CrawlerRunner from scrapy.spidermiddlewares.httperror import HttpError from scrapy.spiders import Spider from scrapy.http import Request @@ -101,6 +103,29 @@ class TestSpider(Spider): pass +class TestSameUrlSpider(Spider): + + name = 'test_same_url' + + def __init__(self, *args, **kwargs): + super(TestSameUrlSpider, self).__init__(*args, **kwargs) + self.visited = 0 + + def parse_first(self, response): + """first callback + @url http://scrapy.org + """ + self.visited += 1 + return TestItem() + + def parse_second(self, response): + """second callback + @url http://scrapy.org + """ + self.visited += 1 + return TestItem() + + class ContractsManagerTest(unittest.TestCase): contracts = [UrlContract, ReturnsContract, ScrapesContract] @@ -177,14 +202,12 @@ class ContractsManagerTest(unittest.TestCase): self.should_succeed() # scrapes_item_fail - request = self.conman.from_method(spider.scrapes_item_fail, - self.results) + request = self.conman.from_method(spider.scrapes_item_fail, self.results) request.callback(response) self.should_fail() # scrapes_dict_item_fail - request = self.conman.from_method(spider.scrapes_dict_item_fail, - self.results) + request = self.conman.from_method(spider.scrapes_dict_item_fail, self.results) request.callback(response) self.should_fail() @@ -202,3 +225,12 @@ class ContractsManagerTest(unittest.TestCase): self.assertFalse(self.results.failures) self.assertTrue(self.results.errors) + + @defer.inlineCallbacks + def test_same_url(self): + TestSameUrlSpider.start_requests = lambda s: self.conman.from_spider(s, self.results) + + crawler = CrawlerRunner().create_crawler(TestSameUrlSpider) + yield crawler.crawl() + + self.assertEqual(crawler.spider.visited, 2) From 2cb4decb6ad52548b3441c877235c540cef12082 Mon Sep 17 00:00:00 2001 From: Stas Glubokiy Date: Wed, 15 Aug 2018 20:36:10 +0300 Subject: [PATCH 121/889] Move TestSameUrlSpider to test method --- tests/test_contracts.py | 45 ++++++++++++++++++++--------------------- 1 file changed, 22 insertions(+), 23 deletions(-) diff --git a/tests/test_contracts.py b/tests/test_contracts.py index e4f1a777b..430d89253 100644 --- a/tests/test_contracts.py +++ b/tests/test_contracts.py @@ -103,29 +103,6 @@ class TestSpider(Spider): pass -class TestSameUrlSpider(Spider): - - name = 'test_same_url' - - def __init__(self, *args, **kwargs): - super(TestSameUrlSpider, self).__init__(*args, **kwargs) - self.visited = 0 - - def parse_first(self, response): - """first callback - @url http://scrapy.org - """ - self.visited += 1 - return TestItem() - - def parse_second(self, response): - """second callback - @url http://scrapy.org - """ - self.visited += 1 - return TestItem() - - class ContractsManagerTest(unittest.TestCase): contracts = [UrlContract, ReturnsContract, ScrapesContract] @@ -228,6 +205,28 @@ class ContractsManagerTest(unittest.TestCase): @defer.inlineCallbacks def test_same_url(self): + + class TestSameUrlSpider(Spider): + name = 'test_same_url' + + def __init__(self, *args, **kwargs): + super(TestSameUrlSpider, self).__init__(*args, **kwargs) + self.visited = 0 + + def parse_first(self, response): + """first callback + @url http://scrapy.org + """ + self.visited += 1 + return TestItem() + + def parse_second(self, response): + """second callback + @url http://scrapy.org + """ + self.visited += 1 + return TestItem() + TestSameUrlSpider.start_requests = lambda s: self.conman.from_spider(s, self.results) crawler = CrawlerRunner().create_crawler(TestSameUrlSpider) From ddd69f4c10578975658ef6ac450cbe1bed85df80 Mon Sep 17 00:00:00 2001 From: Stas Glubokiy Date: Wed, 15 Aug 2018 20:39:43 +0300 Subject: [PATCH 122/889] Use MockServer in test_same_url --- tests/test_contracts.py | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff --git a/tests/test_contracts.py b/tests/test_contracts.py index 430d89253..223a926f1 100644 --- a/tests/test_contracts.py +++ b/tests/test_contracts.py @@ -15,6 +15,7 @@ from scrapy.contracts.default import ( ReturnsContract, ScrapesContract, ) +from tests.mockserver import MockServer class TestItem(Item): @@ -213,6 +214,9 @@ class ContractsManagerTest(unittest.TestCase): super(TestSameUrlSpider, self).__init__(*args, **kwargs) self.visited = 0 + def start_requests(s): + return self.conman.from_spider(s, self.results) + def parse_first(self, response): """first callback @url http://scrapy.org @@ -227,9 +231,8 @@ class ContractsManagerTest(unittest.TestCase): self.visited += 1 return TestItem() - TestSameUrlSpider.start_requests = lambda s: self.conman.from_spider(s, self.results) - crawler = CrawlerRunner().create_crawler(TestSameUrlSpider) - yield crawler.crawl() + with MockServer() as mockserver: + yield crawler.crawl(mockserver=mockserver) self.assertEqual(crawler.spider.visited, 2) From 2b212d426668c02704bc23c4e988fa108e0738ef Mon Sep 17 00:00:00 2001 From: Vostretsov Nikita Date: Fri, 17 Aug 2018 14:39:06 +0000 Subject: [PATCH 123/889] ignore cache for pytests --- .gitignore | 1 + 1 file changed, 1 insertion(+) diff --git a/.gitignore b/.gitignore index 406146e5f..ff6e2ea65 100644 --- a/.gitignore +++ b/.gitignore @@ -12,6 +12,7 @@ dist .idea htmlcov/ .coverage +.pytest_cache/ .coverage.* .cache/ From d95762db7c9abe59d8edfc8c17397a5a5bbfc661 Mon Sep 17 00:00:00 2001 From: Vostretsov Nikita Date: Fri, 17 Aug 2018 14:39:24 +0000 Subject: [PATCH 124/889] new signal --- scrapy/signals.py | 1 + 1 file changed, 1 insertion(+) diff --git a/scrapy/signals.py b/scrapy/signals.py index e36c27203..c0e4bb74e 100644 --- a/scrapy/signals.py +++ b/scrapy/signals.py @@ -13,6 +13,7 @@ spider_closed = object() spider_error = object() request_scheduled = object() request_dropped = object() +request_reached_downloader = object() response_received = object() response_downloaded = object() item_scraped = object() From 597b8a97ad468123432dba3d6f2c3dd943f4aa36 Mon Sep 17 00:00:00 2001 From: Vostretsov Nikita Date: Fri, 17 Aug 2018 14:39:42 +0000 Subject: [PATCH 125/889] documentation for new signal --- docs/topics/signals.rst | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/docs/topics/signals.rst b/docs/topics/signals.rst index d40c0e1df..cf7b8db2f 100644 --- a/docs/topics/signals.rst +++ b/docs/topics/signals.rst @@ -279,6 +279,22 @@ request_dropped :param spider: the spider that yielded the request :type spider: :class:`~scrapy.spiders.Spider` object +request_reached_downloader +--------------------------- + +.. signal:: request_reached_downloader +.. function:: request_reached_downloader(request, spider) + + Sent when a :class:`~scrapy.http.Request`, reached downloader. + + The signal does not support returning deferreds from their handlers. + + :param request: the request that reached downloader + :type request: :class:`~scrapy.http.Request` object + + :param spider: the spider that yielded the request + :type spider: :class:`~scrapy.spiders.Spider` object + response_received ----------------- From afb1458bd3b75fad78f053ac062910052971cdfc Mon Sep 17 00:00:00 2001 From: Vostretsov Nikita Date: Fri, 17 Aug 2018 14:39:54 +0000 Subject: [PATCH 126/889] tests for new signal --- tests/test_engine.py | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/tests/test_engine.py b/tests/test_engine.py index 719c0c60c..856465161 100644 --- a/tests/test_engine.py +++ b/tests/test_engine.py @@ -103,6 +103,7 @@ class CrawlerRun(object): self.respplug = [] self.reqplug = [] self.reqdropped = [] + self.reqreached = [] self.itemerror = [] self.itemresp = [] self.signals_catched = {} @@ -124,6 +125,7 @@ class CrawlerRun(object): self.crawler.signals.connect(self.item_error, signals.item_error) self.crawler.signals.connect(self.request_scheduled, signals.request_scheduled) self.crawler.signals.connect(self.request_dropped, signals.request_dropped) + self.crawler.signals.connect(self.request_reached, signals.request_reached_downloader) self.crawler.signals.connect(self.response_downloaded, signals.response_downloaded) self.crawler.crawl(start_urls=start_urls) self.spider = self.crawler.spider @@ -155,6 +157,9 @@ class CrawlerRun(object): def request_scheduled(self, request, spider): self.reqplug.append((request, spider)) + def request_reached(self, request, spider): + self.reqreached.append((request, spider)) + def request_dropped(self, request, spider): self.reqdropped.append((request, spider)) @@ -212,6 +217,8 @@ class EngineTest(unittest.TestCase): responses_count = len(self.run.respplug) self.assertEqual(scheduled_requests_count, dropped_requests_count + responses_count) + self.assertEqual(len(self.run.reqreached), + responses_count) def _assert_dropped_requests(self): self.assertEqual(len(self.run.reqdropped), 1) @@ -219,6 +226,7 @@ class EngineTest(unittest.TestCase): def _assert_downloaded_responses(self): # response tests self.assertEqual(8, len(self.run.respplug)) + self.assertEqual(8, len(self.run.reqreached)) for response, _ in self.run.respplug: if self.run.getpath(response.url) == '/item999.html': From 561ad3b63c539b560bbaed1df37d0b60043ab3b3 Mon Sep 17 00:00:00 2001 From: Vostretsov Nikita Date: Fri, 17 Aug 2018 14:40:24 +0000 Subject: [PATCH 127/889] emit new signal --- scrapy/core/downloader/__init__.py | 3 +++ 1 file changed, 3 insertions(+) diff --git a/scrapy/core/downloader/__init__.py b/scrapy/core/downloader/__init__.py index d835e65f7..59c3ad074 100644 --- a/scrapy/core/downloader/__init__.py +++ b/scrapy/core/downloader/__init__.py @@ -129,6 +129,9 @@ class Downloader(object): return response slot.active.add(request) + self.signals.send_catch_log(signal=signals.request_reached_downloader, + request=request, + spider=spider) deferred = defer.Deferred().addBoth(_deactivate) slot.queue.append((request, deferred)) self._process_queue(spider, slot) From 5bac43676425d25169830d4410db60a98a11911f Mon Sep 17 00:00:00 2001 From: Henrique Coura Date: Fri, 17 Aug 2018 15:07:37 -0300 Subject: [PATCH 128/889] Make lazy loading Download Handlers optional --- scrapy/core/downloader/handlers/__init__.py | 14 ++++++++++-- scrapy/core/downloader/handlers/s3.py | 1 + tests/test_downloader_handlers.py | 25 ++++++++++++++++----- 3 files changed, 33 insertions(+), 7 deletions(-) diff --git a/scrapy/core/downloader/handlers/__init__.py b/scrapy/core/downloader/handlers/__init__.py index bc5cd742e..ebe6f5b78 100644 --- a/scrapy/core/downloader/handlers/__init__.py +++ b/scrapy/core/downloader/handlers/__init__.py @@ -24,6 +24,13 @@ class DownloadHandlers(object): crawler.settings.getwithbase('DOWNLOAD_HANDLERS')) for scheme, clspath in six.iteritems(handlers): self._schemes[scheme] = clspath + for scheme in self._schemes: + path = self._schemes[scheme] + dhcls = load_object(path) + lazy = getattr(dhcls, 'lazy', False) + if lazy: + continue + self._load_handler(scheme, dhcls) crawler.signals.connect(self._close, signals.engine_stopped) @@ -40,8 +47,12 @@ class DownloadHandlers(object): return None path = self._schemes[scheme] + dhcls = load_object(path) + self._load_handler(scheme, dhcls) + return self._handlers[scheme] + + def _load_handler(self, scheme, dhcls): try: - dhcls = load_object(path) dh = dhcls(self._crawler.settings) except NotConfigured as ex: self._notconfigured[scheme] = str(ex) @@ -54,7 +65,6 @@ class DownloadHandlers(object): return None else: self._handlers[scheme] = dh - return self._handlers[scheme] def download_request(self, request, spider): scheme = urlparse_cached(request).scheme diff --git a/scrapy/core/downloader/handlers/s3.py b/scrapy/core/downloader/handlers/s3.py index d8bbdd326..e723e616d 100644 --- a/scrapy/core/downloader/handlers/s3.py +++ b/scrapy/core/downloader/handlers/s3.py @@ -31,6 +31,7 @@ def _get_boto_connection(): class S3DownloadHandler(object): + lazy = True def __init__(self, settings, aws_access_key_id=None, aws_secret_access_key=None, \ httpdownloadhandler=HTTPDownloadHandler, **kw): diff --git a/tests/test_downloader_handlers.py b/tests/test_downloader_handlers.py index 2f8973054..116942ebe 100644 --- a/tests/test_downloader_handlers.py +++ b/tests/test_downloader_handlers.py @@ -41,12 +41,20 @@ from scrapy.exceptions import NotConfigured from tests.mockserver import MockServer, ssl_context_factory, Echo from tests.spiders import SingleRequestSpider + class DummyDH(object): def __init__(self, crawler): pass +class DummyLazyDH(object): + lazy = True + + def __init__(self, crawler): + pass + + class OffDH(object): def __init__(self, crawler): @@ -60,8 +68,6 @@ class LoadTestCase(unittest.TestCase): crawler = get_crawler(settings_dict={'DOWNLOAD_HANDLERS': handlers}) dh = DownloadHandlers(crawler) self.assertIn('scheme', dh._schemes) - for scheme in handlers: # force load handlers - dh._get_handler(scheme) self.assertIn('scheme', dh._handlers) self.assertNotIn('scheme', dh._notconfigured) @@ -70,8 +76,6 @@ class LoadTestCase(unittest.TestCase): crawler = get_crawler(settings_dict={'DOWNLOAD_HANDLERS': handlers}) dh = DownloadHandlers(crawler) self.assertIn('scheme', dh._schemes) - for scheme in handlers: # force load handlers - dh._get_handler(scheme) self.assertNotIn('scheme', dh._handlers) self.assertIn('scheme', dh._notconfigured) @@ -80,11 +84,22 @@ class LoadTestCase(unittest.TestCase): crawler = get_crawler(settings_dict={'DOWNLOAD_HANDLERS': handlers}) dh = DownloadHandlers(crawler) self.assertNotIn('scheme', dh._schemes) - for scheme in handlers: # force load handlers + for scheme in handlers: # force load handlers dh._get_handler(scheme) self.assertNotIn('scheme', dh._handlers) self.assertIn('scheme', dh._notconfigured) + def test_lazy_handlers(self): + handlers = {'scheme': 'tests.test_downloader_handlers.DummyLazyDH'} + crawler = get_crawler(settings_dict={'DOWNLOAD_HANDLERS': handlers}) + dh = DownloadHandlers(crawler) + self.assertIn('scheme', dh._schemes) + self.assertNotIn('scheme', dh._handlers) + for scheme in handlers: # force load lazy handler + dh._get_handler(scheme) + self.assertIn('scheme', dh._handlers) + self.assertNotIn('scheme', dh._notconfigured) + class FileTestCase(unittest.TestCase): From e2de0a7203b99d8fc71e62539fdd75dad439982a Mon Sep 17 00:00:00 2001 From: Stas Glubokiy Date: Sat, 18 Aug 2018 15:24:30 +0300 Subject: [PATCH 129/889] Use except Exception --- scrapy/contracts/__init__.py | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/scrapy/contracts/__init__.py b/scrapy/contracts/__init__.py index c62df5ab0..18c59ff22 100644 --- a/scrapy/contracts/__init__.py +++ b/scrapy/contracts/__init__.py @@ -44,7 +44,7 @@ class ContractsManager(object): bound_method = spider.__getattribute__(method) try: requests.append(self.from_method(bound_method, results)) - except: + except Exception: case = _create_testcase(bound_method, 'contract') results.addError(case, sys.exc_info()) From 0467737cf0bc4c5603bd63a87e220482eb724600 Mon Sep 17 00:00:00 2001 From: Stas Glubokiy Date: Sat, 18 Aug 2018 15:42:21 +0300 Subject: [PATCH 130/889] Fix mockserver usage --- tests/test_contracts.py | 14 ++++++-------- 1 file changed, 6 insertions(+), 8 deletions(-) diff --git a/tests/test_contracts.py b/tests/test_contracts.py index c5820f256..0a216b745 100644 --- a/tests/test_contracts.py +++ b/tests/test_contracts.py @@ -222,22 +222,20 @@ class ContractsManagerTest(unittest.TestCase): return self.conman.from_spider(s, self.results) def parse_first(self, response): - """first callback - @url {} - """.format(self.mockserver.url('/status?n=200')) self.visited += 1 return TestItem() def parse_second(self, response): - """second callback - @url {} - """.format(self.mockserver.url('/status?n=200')) self.visited += 1 return TestItem() - crawler = CrawlerRunner().create_crawler(TestSameUrlSpider) with MockServer() as mockserver: - yield crawler.crawl(mockserver=mockserver) + mock_endpoint = mockserver.url('/status?n=200') + TestSameUrlSpider.parse_first.__func__.__doc__ = '@url {}'.format(mock_endpoint) + TestSameUrlSpider.parse_second.__func__.__doc__ = '@url {}'.format(mock_endpoint) + + crawler = CrawlerRunner().create_crawler(TestSameUrlSpider) + yield crawler.crawl() self.assertEqual(crawler.spider.visited, 2) From 57824600a8295f0d8537de2a8d1c3eb9977ed36d Mon Sep 17 00:00:00 2001 From: Stas Glubokiy Date: Sun, 19 Aug 2018 16:56:41 +0300 Subject: [PATCH 131/889] Use six.get_unbound_function in test_same_url --- tests/test_contracts.py | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/tests/test_contracts.py b/tests/test_contracts.py index 0a216b745..b4209e1f6 100644 --- a/tests/test_contracts.py +++ b/tests/test_contracts.py @@ -1,5 +1,6 @@ from unittest import TextTestResult +from six import get_unbound_function from twisted.internet import defer from twisted.python import failure from twisted.trial import unittest @@ -230,9 +231,10 @@ class ContractsManagerTest(unittest.TestCase): return TestItem() with MockServer() as mockserver: - mock_endpoint = mockserver.url('/status?n=200') - TestSameUrlSpider.parse_first.__func__.__doc__ = '@url {}'.format(mock_endpoint) - TestSameUrlSpider.parse_second.__func__.__doc__ = '@url {}'.format(mock_endpoint) + contract_doc = '@url {}'.format(mockserver.url('/status?n=200')) + + get_unbound_function(TestSameUrlSpider.parse_first).__doc__ = contract_doc + get_unbound_function(TestSameUrlSpider.parse_second).__doc__ = contract_doc crawler = CrawlerRunner().create_crawler(TestSameUrlSpider) yield crawler.crawl() From 167211ffb0e7fa7756483aa9f20e1ab5589c7c4a Mon Sep 17 00:00:00 2001 From: Henrique Coura Date: Mon, 20 Aug 2018 15:54:04 -0300 Subject: [PATCH 132/889] Default is lazy, load_object exception handling, code improvements --- scrapy/core/downloader/handlers/__init__.py | 22 +++++++++------------ scrapy/core/downloader/handlers/datauri.py | 2 ++ scrapy/core/downloader/handlers/file.py | 2 ++ scrapy/core/downloader/handlers/ftp.py | 3 +++ scrapy/core/downloader/handlers/http10.py | 1 + scrapy/core/downloader/handlers/http11.py | 1 + scrapy/core/downloader/handlers/s3.py | 1 - tests/test_downloader_handlers.py | 4 +++- 8 files changed, 21 insertions(+), 15 deletions(-) diff --git a/scrapy/core/downloader/handlers/__init__.py b/scrapy/core/downloader/handlers/__init__.py index ebe6f5b78..0b55d32fa 100644 --- a/scrapy/core/downloader/handlers/__init__.py +++ b/scrapy/core/downloader/handlers/__init__.py @@ -24,13 +24,7 @@ class DownloadHandlers(object): crawler.settings.getwithbase('DOWNLOAD_HANDLERS')) for scheme, clspath in six.iteritems(handlers): self._schemes[scheme] = clspath - for scheme in self._schemes: - path = self._schemes[scheme] - dhcls = load_object(path) - lazy = getattr(dhcls, 'lazy', False) - if lazy: - continue - self._load_handler(scheme, dhcls) + self._load_handler(scheme, skip_lazy=True) crawler.signals.connect(self._close, signals.engine_stopped) @@ -46,13 +40,14 @@ class DownloadHandlers(object): self._notconfigured[scheme] = 'no handler available for that scheme' return None - path = self._schemes[scheme] - dhcls = load_object(path) - self._load_handler(scheme, dhcls) - return self._handlers[scheme] + return self._load_handler(scheme) - def _load_handler(self, scheme, dhcls): + def _load_handler(self, scheme, skip_lazy=False): + path = self._schemes[scheme] try: + dhcls = load_object(path) + if skip_lazy and getattr(dhcls, 'lazy', True): + return None dh = dhcls(self._crawler.settings) except NotConfigured as ex: self._notconfigured[scheme] = str(ex) @@ -60,11 +55,12 @@ class DownloadHandlers(object): except Exception as ex: logger.error('Loading "%(clspath)s" for scheme "%(scheme)s"', {"clspath": path, "scheme": scheme}, - exc_info=True, extra={'crawler': self._crawler}) + exc_info=True, extra={'crawler': self._crawler}) self._notconfigured[scheme] = str(ex) return None else: self._handlers[scheme] = dh + return dh def download_request(self, request, spider): scheme = urlparse_cached(request).scheme diff --git a/scrapy/core/downloader/handlers/datauri.py b/scrapy/core/downloader/handlers/datauri.py index d102f2b73..ad25beb3b 100644 --- a/scrapy/core/downloader/handlers/datauri.py +++ b/scrapy/core/downloader/handlers/datauri.py @@ -6,6 +6,8 @@ from scrapy.utils.decorators import defers class DataURIDownloadHandler(object): + lazy = False + def __init__(self, settings): super(DataURIDownloadHandler, self).__init__() diff --git a/scrapy/core/downloader/handlers/file.py b/scrapy/core/downloader/handlers/file.py index 9346ce08d..23f25d28d 100644 --- a/scrapy/core/downloader/handlers/file.py +++ b/scrapy/core/downloader/handlers/file.py @@ -2,7 +2,9 @@ from w3lib.url import file_uri_to_path from scrapy.responsetypes import responsetypes from scrapy.utils.decorators import defers + class FileDownloadHandler(object): + lazy = False def __init__(self, settings): pass diff --git a/scrapy/core/downloader/handlers/ftp.py b/scrapy/core/downloader/handlers/ftp.py index 933bc7e8d..c342d4ab1 100644 --- a/scrapy/core/downloader/handlers/ftp.py +++ b/scrapy/core/downloader/handlers/ftp.py @@ -60,7 +60,10 @@ class ReceivedDataProtocol(Protocol): self.body.close() if self.filename else self.body.seek(0) _CODE_RE = re.compile("\d+") + + class FTPDownloadHandler(object): + lazy = False CODE_MAPPING = { "550": 404, diff --git a/scrapy/core/downloader/handlers/http10.py b/scrapy/core/downloader/handlers/http10.py index 0322bbe49..d875fb1e4 100644 --- a/scrapy/core/downloader/handlers/http10.py +++ b/scrapy/core/downloader/handlers/http10.py @@ -6,6 +6,7 @@ from scrapy.utils.python import to_unicode class HTTP10DownloadHandler(object): + lazy = False def __init__(self, settings): self.HTTPClientFactory = load_object(settings['DOWNLOADER_HTTPCLIENTFACTORY']) diff --git a/scrapy/core/downloader/handlers/http11.py b/scrapy/core/downloader/handlers/http11.py index 038db7b47..0673188a1 100644 --- a/scrapy/core/downloader/handlers/http11.py +++ b/scrapy/core/downloader/handlers/http11.py @@ -33,6 +33,7 @@ logger = logging.getLogger(__name__) class HTTP11DownloadHandler(object): + lazy = False def __init__(self, settings): self._pool = HTTPConnectionPool(reactor, persistent=True) diff --git a/scrapy/core/downloader/handlers/s3.py b/scrapy/core/downloader/handlers/s3.py index e723e616d..d8bbdd326 100644 --- a/scrapy/core/downloader/handlers/s3.py +++ b/scrapy/core/downloader/handlers/s3.py @@ -31,7 +31,6 @@ def _get_boto_connection(): class S3DownloadHandler(object): - lazy = True def __init__(self, settings, aws_access_key_id=None, aws_secret_access_key=None, \ httpdownloadhandler=HTTPDownloadHandler, **kw): diff --git a/tests/test_downloader_handlers.py b/tests/test_downloader_handlers.py index 116942ebe..0d0829793 100644 --- a/tests/test_downloader_handlers.py +++ b/tests/test_downloader_handlers.py @@ -43,19 +43,21 @@ from tests.spiders import SingleRequestSpider class DummyDH(object): + lazy = False def __init__(self, crawler): pass class DummyLazyDH(object): - lazy = True + # Default is lazy for backwards compatibility def __init__(self, crawler): pass class OffDH(object): + lazy = False def __init__(self, crawler): raise NotConfigured From af555cab23958501f07f8b2771c082ac3f3a5961 Mon Sep 17 00:00:00 2001 From: Raphael Wuillemier Date: Wed, 22 Aug 2018 14:15:53 +0200 Subject: [PATCH 133/889] Added general guide for developer tools instead of Firefox and Firebug-sections --- docs/index.rst | 10 +- docs/intro/tutorial.rst | 3 +- docs/topics/_images/inspector_01.png | Bin 0 -> 53922 bytes docs/topics/_images/network_01.png | Bin 0 -> 10720 bytes docs/topics/_images/network_02.png | Bin 0 -> 82702 bytes docs/topics/_images/network_03.png | Bin 0 -> 45506 bytes docs/topics/developer-tools.rst | 248 +++++++++++++++++++++++++++ docs/topics/firebug.rst | 167 ------------------ docs/topics/firefox.rst | 82 --------- 9 files changed, 252 insertions(+), 258 deletions(-) create mode 100644 docs/topics/_images/inspector_01.png create mode 100644 docs/topics/_images/network_01.png create mode 100644 docs/topics/_images/network_02.png create mode 100644 docs/topics/_images/network_03.png create mode 100644 docs/topics/developer-tools.rst delete mode 100644 docs/topics/firebug.rst delete mode 100644 docs/topics/firefox.rst diff --git a/docs/index.rst b/docs/index.rst index 7e8c979c4..0a96aa88e 100644 --- a/docs/index.rst +++ b/docs/index.rst @@ -151,8 +151,7 @@ Solving specific problems topics/contracts topics/practices topics/broad-crawls - topics/firefox - topics/firebug + topics/developer-tools topics/leaks topics/media-pipeline topics/deploy @@ -175,11 +174,8 @@ Solving specific problems :doc:`topics/broad-crawls` Tune Scrapy for crawling a lot domains in parallel. -:doc:`topics/firefox` - Learn how to scrape with Firefox and some useful add-ons. - -:doc:`topics/firebug` - Learn how to scrape efficiently using Firebug. +:doc:`topics/developer-tools` + Learn how to scrape with your browser's developer tools. :doc:`topics/leaks` Learn how to find and get rid of memory leaks in your crawler. diff --git a/docs/intro/tutorial.rst b/docs/intro/tutorial.rst index 0db6a6218..fa6dc274d 100644 --- a/docs/intro/tutorial.rst +++ b/docs/intro/tutorial.rst @@ -298,8 +298,7 @@ expressions`:: In order to find the proper CSS selectors to use, you might find useful opening the response page from the shell in your web browser using ``view(response)``. -You can use your browser developer tools or extensions like Firebug (see -sections about :ref:`topics-firebug` and :ref:`topics-firefox`). +You can use your browser developer tools (see section about :ref:`topics-developer-tools`). `Selector Gadget`_ is also a nice tool to quickly find CSS selector for visually selected elements, which works in many browsers. diff --git a/docs/topics/_images/inspector_01.png b/docs/topics/_images/inspector_01.png new file mode 100644 index 0000000000000000000000000000000000000000..edb8795dcb8890bac8311db1445435f969761aa0 GIT 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z<96s*Kh4;FzK{KaZoaDGVO1x2GsSaz-Ws|f>{CtaKWj&xhWEwvAcJAW!|k0=`ct$rb`#E#)DLv%t#<8jwc>r&dQBS+v#%RBj zaFK!!ZnTf0KXr40Gde9x8DYyvK25tgre?=cyycTI0CK+XTSMzhe0TAkkTbN4q*;HZ zD@%FzC}&x$*i2XO6x?r-c@qm}IUP~mogsF~0A~w|Ub~?gyUBRTi&mWp?Ha)-G@kjg zkGHXuYX(I9?#5w#mGAcFRUS|>@~&oCQ-eKD_=9C^zE5yu*Mta@+23KU8Eq8M47um@ zl0>|b71Ffd=m_(Q9ui!Gv5pk(-#~F(9w4Q`Af?w>lNm+%m2q2&#W9j3yPw)Gd)6Fu zF!0`WFvsXsISD917GHl3L79hg?GCPTg`_kKK;S5hR6lGuc>K!h5+oRN?!l4-B)q9w z#bncvpjPf Tyui452mZ)PDoT`#8T$P{6=#Uk literal 0 HcmV?d00001 diff --git a/docs/topics/developer-tools.rst b/docs/topics/developer-tools.rst new file mode 100644 index 000000000..dd1dd3a62 --- /dev/null +++ b/docs/topics/developer-tools.rst @@ -0,0 +1,248 @@ +.. _topics-developer-tools: + +========================== +Using your browser's Developer Tools for scraping +========================== + +Here is a general guide on how to use your browser's Developer Tools +to ease the scraping process. Today almost all browsers come with +built in `Developer Tools`_ and although we will use Firefox in this +guide, the concepts are applicable to any other browser. + +In this guide we'll introduce the basic tools to use from a browser's +Developer Tools by scraping `quotes.toscrape.com`_. + +.. _topics-livedom: + +Caveats with inspecting the live browser DOM +============================================ + +Since Developer Tools operate on a live browser DOM, what you'll actually see +when inspecting the page source is not the original HTML, but a modified one +after applying some browser clean up and executing Javascript code. Firefox, +in particular, is known for adding ```` elements to tables. Scrapy, on +the other hand, does not modify the original page HTML, so you won't be able to +extract any data if you use ```` in your XPath expressions. + +Therefore, you should keep in mind the following things: + +* Disable Javascript while inspecting the DOM looking for XPaths to be + used in Scrapy + +* Never use full XPath paths, use relative and clever ones based on attributes + (such as ``id``, ``class``, ``width``, etc) or any identifying features like + ``contains(@href, 'image')``. + +* Never include ```` elements in your XPath expressions unless you + really know what you're doing + +.. _topics-inspector: + +Inspecting a website +=================================== + +By far the most handy feature of the Developer Tools is the `Inspector` +feature, which allows you to inspect the underlying HTML code of +any webpage. To demonstrate the Inspector, let's take a +look at the `quotes.toscrape.com`_-site. + +On the site we have a total of ten quotes from various authors with specific +tags, as well as the Top Ten Tags. Let's say we want to extract all the quotes +on this page, without any meta-information about authors, tags, etc. + +Instead of viewing the whole source code for the page, we can simply right click +on a quote and select ``Inspect Element (Q)``, which opens up the `Inspector`. +In it you should see something like this: + +.. image:: _images/inspector_01.png + :width: 777 + :height: 469 + :alt: Firefox's Inspector-tool + +The interesting part for us is this: + +.. code-block:: html + +
+ (...) + (...) +
(...)
+
+ +If you hover over the first ``div`` directly above the ``span``-tag highlighted +in the screenshot, you'll see that the corresponding section of the webpage gets +highlighted as well. So now we have a section, but we can't find our quote text +anywhere. + +The advantage of the `Inspector` is that it automatically expands and collapses +sections and tags of a webpage, which greatly improves readability. You can +expand and collapse a tag by clicking on the arrow in front of it or by double +clicking directly on the tag. If we expand the ``span``-tag with the ``class= +"text"`` we will see the quote-text we clicked on. The `Inspector` lets you +copy XPaths to selected elements. Let's try it out: Right-click on the ``span``- +tag, select ``Copy > XPath`` and paste it in the scrapy shell like so:: + + >>> scrapy shell "http://quotes.toscrape.com/" + (...) + >>> response.xpath('/html/body/div/div[2]/div[1]/div[1]/span[1]/text()').extract() + ['"The world as we have created it is a process of our thinking. It cannot be changed without changing our thinking.”] + +Adding ``text()`` at the end we are able to extract the first quote with this +basic selector. But this XPath is not really that clever. All it does is +go down a desired path in the source code starting from ``html``. So let's +see if we can refine our XPath a bit: + +If we check the `Inspector` again we'll see that directly beneath our +expanded ``div``-tag we have eight identical ``div``-tags, each with the +same attributes as our first. If we expand any of them, we'll see the same +structure as with our first quote: Two ``span``-tags and one ``div``-tag. We can +expand each ``span``-tag with the ``class="text"`` inside our ``div``-tags and +see each quote. With this knowledge we can refine our XPath: Instead of a path +to follow, we'll simply select all ``span``-tags with the ``class="text"``:: + + >>> response.xpath('//span[@class="text"]/text()').extract() + ['"The world as we have created it is a process of our thinking. It cannot be changed without changing our thinking.”, + '“It is our choices, Harry, that show what we truly are, far more than our abilities.”', + '“There are only two ways to live your life. One is as though nothing is a miracle. The other is as though everything is a miracle.”', + (...)] + +And with one simple, cleverer XPath we are able to extract all quotes from +the page. We could have constructed a loop over our first XPath to increase +the number of the last ``div``, but this would have been unnecessarily +complex and by simply constructing an XPath with the ``class="text"`` we +were able to extract all quotes in one line. + +The `Inspector` has a lot of other helpful features, such as searching in the +source code or directly scrolling to an element you selected. Let's demonstrate +a use case: + +Say you want to find the ``Next``-button on the page. Type ``Next`` into the +search bar on the top right of the `Inspector`. You should get two results. +The first is a ``li``-tag with the ``class="text"``, the second the text +of an ``a``-tag. Right click on the ``a``-tag and select ``Scroll into View``. +If you hover over the tag, you'll see the button highlighted. From here +we could easily create a :ref:`Link Extract ` to +follow the pagination. On a simple site such as this, there may not be +the need to find an element visually but the ``Scroll into View`` function +can be quite useful on complex sites. + +.. _topics-network-tool: + +The Network-tool +================ +While scraping you may come across dynamic webpages where some parts +of the page is loaded dynamically through multiple requests. While +this can be quite tricky, the `Network`-tool in the Developer Tools +greatly facilitates this task. To demonstrate the Network-tool, let's +take a look at the page `quotes.toscrape.com/scroll`_. + +The page is quite similar to the basic `quotes.toscrape.com`_-page, +but instead of the above-mentioned ``Next``-button, the page +automatically loads new quotes when you scroll to the bottom. We +could go ahead and try out different XPaths directly, but instead +we'll check another quite useful command from the scrapy shell:: + + >>> scrapy shell "quotes.toscrape.com/scroll" + (...) + >>> view(response) + +A browser window should open with the webpage but with one +crucial difference: Instead of the quotes we just see a greenish +bar with the word ``Loading...``. + +.. image:: _images/network_01.png + :width: 777 + :height: 296 + :alt: Response from quotes.toscrape.com/scroll + +The ``view(response)``-command let's us view the response our +shell or later our spider receives from the server. Here we see +that some basic template is loaded which includes the title, +the login-button and the footer, but the quotes are missing. This +tells us that the quotes are being loaded from a different request +than ``quotes.toscrape/scroll``. + +If you click on the ``Network``-tab, you will probably only see +two entries. The first thing we do is enable persistent logs by +clicking on ``Persist Logs``. If this option is disabled, the +log is automatically cleared each time you navigate to a different +page. Enabling this option is a good default, since it gives us +control on when to clear the logs. + +If we reload the page now, you'll see the log get populated with six +new requests. + +.. image:: _images/network_02.png + :width: 777 + :height: 241 + :alt: Network tab with persistent logs and requests + +Here we see every request that has been made when reloading the page +and can inspect each request and its response. So let's find out +where our quotes are coming from: + +First click on the request with the name ``scroll``. On the right +you can now inspect the request. In ``Headers`` you'll find details +about the request headers, such as the URL, the method, the IP-address, +and so on. We'll ignore the other tabs and click directly on ``Reponse``. + +What you should see in the ``Preview``-pane is the rendered HTML-code, +that is exactly what we saw when we called ``view(response`` in the +shell. Accordingly the ``type`` of the request in the log is ``html``. +The other requests have types like ``css`` or ``js``, but what +interests us is the one request called ``quotes?page=1`` with the +type ``json``. + +If we click on this request, we see that the request URL is +``http://quotes.toscrape.com/api/quotes?page=1`` and the response +is a JSON-object that contains our quotes. We can also right-click +on the request and open ``Open in new tab`` to get a better overview. + +.. image:: _images/network_03.png + :width: 777 + :height: 375 + :alt: JSON-object returned from the quotes.toscrape API + +With this response we can now easily parse the JSON-object and +also request each page to get every quote on the site:: + + import scrapy + import json + + + class QuoteSpider(scrapy.Spider): + name = 'quote' + allowed_domains = ['quotes.toscrape.com'] + page = 1 + start_urls = ['http://quotes.toscrape.com/api/quotes?page=1] + + def parse(self, response): + data = json.loads(response.text) + for quote in data["quotes"]: + quote = quote["text"] + print(quote) + if data["has_next"]: + self.page += 1 + url = "http://quotes.toscrape.com/api/quotes?page={}".format(self.page) + yield scrapy.Request(url=url, callback=self.parse) + +This spider starts at the first page of the quotes-API. With each +response, we parse the ``response.text`` and assign it to ``data``. +This lets us operate on the JSON-object like on a Python dictionary. +We iterate through the ``quotes`` and print out the ``quote["text"]``. +If the handy ``has_next``-element is ``true`` (try loading +`http://quotes.toscrape.com/api/quotes?page=10`_ in your browser or a +page-number greater than 10), we increment the ``page``-attribute +and ``yield`` a new request, inserting the incremented page-number +into our ``url``. + +You can see that with a few inspections in the `Network`-tool we +were able to easily replicate the dynamic requests of the scrolling +functionality of the page. Crawling dynamic pages can be quite +daunting and pages can be very complex, but it (mostly) boils down +to identifying the correct request and replicating it in your spider. + +.. _Developer Tools: https://en.wikipedia.org/wiki/Web_development_tools +.. _quotes.toscrape.com: http://quotes.toscrape.com +.. _quotes.toscrape.com/scroll: quotes.toscrape.com/scroll/ + diff --git a/docs/topics/firebug.rst b/docs/topics/firebug.rst deleted file mode 100644 index 4ea8d3bd0..000000000 --- a/docs/topics/firebug.rst +++ /dev/null @@ -1,167 +0,0 @@ -.. _topics-firebug: - -========================== -Using Firebug for scraping -========================== - -.. note:: Google Directory, the example website used in this guide is no longer - available as it `has been shut down by Google`_. The concepts in this guide - are still valid though. If you want to update this guide to use a new - (working) site, your contribution will be more than welcome!. See :ref:`topics-contributing` - for information on how to do so. - -Introduction -============ - -This document explains how to use `Firebug`_ (a Firefox add-on) to make the -scraping process easier and more fun. For other useful Firefox add-ons see -:ref:`topics-firefox-addons`. There are some caveats with using Firefox add-ons -to inspect pages, see :ref:`topics-firefox-livedom`. - -In this example, we'll show how to use `Firebug`_ to scrape data from the -`Google Directory`_, which contains the same data as the `Open Directory -Project`_ used in the :ref:`tutorial ` but with a different -face. - -.. _Firebug: https://getfirebug.com/ -.. _Google Directory: http://directory.google.com/ -.. _Open Directory Project: http://www.dmoz.org - -Firebug comes with a very useful feature called `Inspect Element`_ which allows -you to inspect the HTML code of the different page elements just by hovering -your mouse over them. Otherwise you would have to search for the tags manually -through the HTML body which can be a very tedious task. - -.. _Inspect Element: https://www.youtube.com/watch?v=-pT_pDe54aA - -In the following screenshot you can see the `Inspect Element`_ tool in action. - -.. image:: _images/firebug1.png - :width: 913 - :height: 600 - :alt: Inspecting elements with Firebug - -At first sight, we can see that the directory is divided in categories, which -are also divided in subcategories. - -However, it seems that there are more subcategories than the ones being shown -in this page, so we'll keep looking: - -.. image:: _images/firebug2.png - :width: 819 - :height: 629 - :alt: Inspecting elements with Firebug - -As expected, the subcategories contain links to other subcategories, and also -links to actual websites, which is the purpose of the directory. - -Getting links to follow -======================= - -By looking at the category URLs we can see they share a pattern: - - http://directory.google.com/Category/Subcategory/Another_Subcategory - -Once we know that, we are able to construct a regular expression to follow -those links. For example, the following one:: - - directory\.google\.com/[A-Z][a-zA-Z_/]+$ - -So, based on that regular expression we can create the first crawling rule:: - - Rule(LinkExtractor(allow='directory.google.com/[A-Z][a-zA-Z_/]+$', ), - 'parse_category', - follow=True, - ), - -The :class:`~scrapy.spiders.Rule` object instructs -:class:`~scrapy.spiders.CrawlSpider` based spiders how to follow the -category links. ``parse_category`` will be a method of the spider which will -process and extract data from those pages. - -This is how the spider would look so far:: - - from scrapy.linkextractors import LinkExtractor - from scrapy.spiders import CrawlSpider, Rule - - class GoogleDirectorySpider(CrawlSpider): - name = 'directory.google.com' - allowed_domains = ['directory.google.com'] - start_urls = ['http://directory.google.com/'] - - rules = ( - Rule(LinkExtractor(allow='directory\.google\.com/[A-Z][a-zA-Z_/]+$'), - 'parse_category', follow=True, - ), - ) - - def parse_category(self, response): - # write the category page data extraction code here - pass - - -Extracting the data -=================== - -Now we're going to write the code to extract data from those pages. - -With the help of Firebug, we'll take a look at some page containing links to -websites (say http://directory.google.com/Top/Arts/Awards/) and find out how we can -extract those links using :ref:`Selectors `. We'll also -use the :ref:`Scrapy shell ` to test those XPath's and make sure -they work as we expect. - -.. image:: _images/firebug3.png - :width: 965 - :height: 751 - :alt: Inspecting elements with Firebug - -As you can see, the page markup is not very descriptive: the elements don't -contain ``id``, ``class`` or any attribute that clearly identifies them, so -we'll use the ranking bars as a reference point to select the data to extract -when we construct our XPaths. - -After using FireBug, we can see that each link is inside a ``td`` tag, which is -itself inside a ``tr`` tag that also contains the link's ranking bar (in -another ``td``). - -So we can select the ranking bar, then find its parent (the ``tr``), and then -finally, the link's ``td`` (which contains the data we want to scrape). - -This results in the following XPath:: - - //td[descendant::a[contains(@href, "#pagerank")]]/following-sibling::td//a - -It's important to use the :ref:`Scrapy shell ` to test these -complex XPath expressions and make sure they work as expected. - -Basically, that expression will look for the ranking bar's ``td`` element, and -then select any ``td`` element who has a descendant ``a`` element whose -``href`` attribute contains the string ``#pagerank``" - -Of course, this is not the only XPath, and maybe not the simpler one to select -that data. Another approach could be, for example, to find any ``font`` tags -that have that grey colour of the links, - -Finally, we can write our ``parse_category()`` method:: - - def parse_category(self, response): - # The path to website links in directory page - links = response.xpath('//td[descendant::a[contains(@href, "#pagerank")]]/following-sibling::td/font') - - for link in links: - item = DirectoryItem() - item['name'] = link.xpath('a/text()').extract() - item['url'] = link.xpath('a/@href').extract() - item['description'] = link.xpath('font[2]/text()').extract() - yield item - - -Be aware that you may find some elements which appear in Firebug but -not in the original HTML, such as the typical case of ```` -elements. - -or tags which Therefer in page HTML -sources may on Firebug inspects the live DOM - -.. _has been shut down by Google: https://searchenginewatch.com/sew/news/2096661/google-directory-shut diff --git a/docs/topics/firefox.rst b/docs/topics/firefox.rst deleted file mode 100644 index 2c85848be..000000000 --- a/docs/topics/firefox.rst +++ /dev/null @@ -1,82 +0,0 @@ -.. _topics-firefox: - -========================== -Using Firefox for scraping -========================== - -Here is a list of tips and advice on using Firefox for scraping, along with a -list of useful Firefox add-ons to ease the scraping process. - -.. _topics-firefox-livedom: - -Caveats with inspecting the live browser DOM -============================================ - -Since Firefox add-ons operate on a live browser DOM, what you'll actually see -when inspecting the page source is not the original HTML, but a modified one -after applying some browser clean up and executing Javascript code. Firefox, -in particular, is known for adding ```` elements to tables. Scrapy, on -the other hand, does not modify the original page HTML, so you won't be able to -extract any data if you use ```` in your XPath expressions. - -Therefore, you should keep in mind the following things when working with -Firefox and XPath: - -* Disable Firefox Javascript while inspecting the DOM looking for XPaths to be - used in Scrapy - -* Never use full XPath paths, use relative and clever ones based on attributes - (such as ``id``, ``class``, ``width``, etc) or any identifying features like - ``contains(@href, 'image')``. - -* Never include ```` elements in your XPath expressions unless you - really know what you're doing - -.. _topics-firefox-addons: - -Useful Firefox add-ons for scraping -=================================== - -Firebug -------- - -`Firebug`_ is a widely known tool among web developers and it's also very -useful for scraping. In particular, its `Inspect Element`_ feature comes very -handy when you need to construct the XPaths for extracting data because it -allows you to view the HTML code of each page element while moving your mouse -over it. - -See :ref:`topics-firebug` for a detailed guide on how to use Firebug with -Scrapy. - -XPather -------- - -`XPather`_ allows you to test XPath expressions directly on the pages. - -XPath Checker -------------- - -`XPath Checker`_ is another Firefox add-on for testing XPaths on your pages. - -Tamper Data ------------ - -`Tamper Data`_ is a Firefox add-on which allows you to view and modify the HTTP -request headers sent by Firefox. Firebug also allows to view HTTP headers, but -not to modify them. - -Firecookie ----------- - -`Firecookie`_ makes it easier to view and manage cookies. You can use this -extension to create a new cookie, delete existing cookies, see a list of cookies -for the current site, manage cookies permissions and a lot more. - -.. _Firebug: https://getfirebug.com/ -.. _Inspect Element: https://www.youtube.com/watch?v=-pT_pDe54aA -.. _XPather: https://addons.mozilla.org/en-US/firefox/addon/xpather/ -.. _XPath Checker: https://addons.mozilla.org/en-US/firefox/addon/xpath-checker/ -.. _Tamper Data: https://addons.mozilla.org/en-US/firefox/addon/tamper-data/ -.. _Firecookie: https://addons.mozilla.org/en-US/firefox/addon/firecookie/ - From 3a71e7dbce94e6056a5258c59df0150a94ddc187 Mon Sep 17 00:00:00 2001 From: testingcan Date: Wed, 22 Aug 2018 16:57:51 +0200 Subject: [PATCH 134/889] Increased length of "=" --- docs/topics/developer-tools.rst | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/docs/topics/developer-tools.rst b/docs/topics/developer-tools.rst index dd1dd3a62..aa4050948 100644 --- a/docs/topics/developer-tools.rst +++ b/docs/topics/developer-tools.rst @@ -1,8 +1,8 @@ .. _topics-developer-tools: -========================== +================================================= Using your browser's Developer Tools for scraping -========================== +================================================= Here is a general guide on how to use your browser's Developer Tools to ease the scraping process. Today almost all browsers come with From 4d3aaabbcaa3a39ba56f443ccfe8a60888223013 Mon Sep 17 00:00:00 2001 From: Raphael Wuillemier Date: Thu, 23 Aug 2018 12:40:31 +0200 Subject: [PATCH 135/889] Updated code, added code snippets and improved readability --- docs/topics/developer-tools.rst | 84 ++++++++++++++++++++------------- 1 file changed, 52 insertions(+), 32 deletions(-) diff --git a/docs/topics/developer-tools.rst b/docs/topics/developer-tools.rst index aa4050948..6bd2c052a 100644 --- a/docs/topics/developer-tools.rst +++ b/docs/topics/developer-tools.rst @@ -27,7 +27,7 @@ extract any data if you use ```` in your XPath expressions. Therefore, you should keep in mind the following things: * Disable Javascript while inspecting the DOM looking for XPaths to be - used in Scrapy + used in Scrapy (in the Developer Tools settings click `Disable JavaScript`) * Never use full XPath paths, use relative and clever ones based on attributes (such as ``id``, ``class``, ``width``, etc) or any identifying features like @@ -43,8 +43,8 @@ Inspecting a website By far the most handy feature of the Developer Tools is the `Inspector` feature, which allows you to inspect the underlying HTML code of -any webpage. To demonstrate the Inspector, let's take a -look at the `quotes.toscrape.com`_-site. +any webpage. To demonstrate the Inspector, let's look at the +`quotes.toscrape.com`_-site. On the site we have a total of ten quotes from various authors with specific tags, as well as the Top Ten Tags. Let's say we want to extract all the quotes @@ -69,7 +69,7 @@ The interesting part for us is this:
(...)
-If you hover over the first ``div`` directly above the ``span``-tag highlighted +If you hover over the first ``div`` directly above the ``span`` tag highlighted in the screenshot, you'll see that the corresponding section of the webpage gets highlighted as well. So now we have a section, but we can't find our quote text anywhere. @@ -77,14 +77,14 @@ anywhere. The advantage of the `Inspector` is that it automatically expands and collapses sections and tags of a webpage, which greatly improves readability. You can expand and collapse a tag by clicking on the arrow in front of it or by double -clicking directly on the tag. If we expand the ``span``-tag with the ``class= +clicking directly on the tag. If we expand the ``span`` tag with the ``class= "text"`` we will see the quote-text we clicked on. The `Inspector` lets you -copy XPaths to selected elements. Let's try it out: Right-click on the ``span``- +copy XPaths to selected elements. Let's try it out: Right-click on the ``span`` tag, select ``Copy > XPath`` and paste it in the scrapy shell like so:: - >>> scrapy shell "http://quotes.toscrape.com/" + $ scrapy shell "http://quotes.toscrape.com/" (...) - >>> response.xpath('/html/body/div/div[2]/div[1]/div[1]/span[1]/text()').extract() + >>> response.xpath('/html/body/div/div[2]/div[1]/div[1]/span[1]/text()').getall() ['"The world as we have created it is a process of our thinking. It cannot be changed without changing our thinking.”] Adding ``text()`` at the end we are able to extract the first quote with this @@ -93,14 +93,28 @@ go down a desired path in the source code starting from ``html``. So let's see if we can refine our XPath a bit: If we check the `Inspector` again we'll see that directly beneath our -expanded ``div``-tag we have eight identical ``div``-tags, each with the +expanded ``div`` tag we have nine identical ``div`` tags, each with the same attributes as our first. If we expand any of them, we'll see the same -structure as with our first quote: Two ``span``-tags and one ``div``-tag. We can -expand each ``span``-tag with the ``class="text"`` inside our ``div``-tags and -see each quote. With this knowledge we can refine our XPath: Instead of a path -to follow, we'll simply select all ``span``-tags with the ``class="text"``:: +structure as with our first quote: Two ``span`` tags and one ``div`` tag. We can +expand each ``span`` tag with the ``class="text"`` inside our ``div`` tags and +see each quote: - >>> response.xpath('//span[@class="text"]/text()').extract() +.. code-block:: html + +
+ + “The world as we have created it is a process of our thinking. It cannot be changed without changing our thinking.” + + (...) +
(...)
+
+ + +With this knowledge we can refine our XPath: Instead of a path to follow, +we'll simply select all ``span`` tags with the ``class="text"`` by using +the `has-class-extension`_:: + + >>> response.xpath('//span[has-class("text")]/text()').getall() ['"The world as we have created it is a process of our thinking. It cannot be changed without changing our thinking.”, '“It is our choices, Harry, that show what we truly are, far more than our abilities.”', '“There are only two ways to live your life. One is as though nothing is a miracle. The other is as though everything is a miracle.”', @@ -109,40 +123,45 @@ to follow, we'll simply select all ``span``-tags with the ``class="text"``:: And with one simple, cleverer XPath we are able to extract all quotes from the page. We could have constructed a loop over our first XPath to increase the number of the last ``div``, but this would have been unnecessarily -complex and by simply constructing an XPath with the ``class="text"`` we -were able to extract all quotes in one line. +complex and by simply constructing an XPath with ``has-class("text")`` +we were able to extract all quotes in one line. The `Inspector` has a lot of other helpful features, such as searching in the source code or directly scrolling to an element you selected. Let's demonstrate a use case: -Say you want to find the ``Next``-button on the page. Type ``Next`` into the +Say you want to find the ``Next`` button on the page. Type ``Next`` into the search bar on the top right of the `Inspector`. You should get two results. -The first is a ``li``-tag with the ``class="text"``, the second the text -of an ``a``-tag. Right click on the ``a``-tag and select ``Scroll into View``. +The first is a ``li`` tag with the ``class="text"``, the second the text +of an ``a`` tag. Right click on the ``a`` tag and select ``Scroll into View``. If you hover over the tag, you'll see the button highlighted. From here -we could easily create a :ref:`Link Extract ` to +we could easily create a :ref:`Link Extractor ` to follow the pagination. On a simple site such as this, there may not be the need to find an element visually but the ``Scroll into View`` function can be quite useful on complex sites. +Note that the search bar can also be used to search for and test CSS +selectors. For example, you could search for ``span.text`` to find +all quote texts. Instead of a full text search, this searches for +exactly the ``span`` tag with the ``class="text"`` in the page. + .. _topics-network-tool: The Network-tool ================ While scraping you may come across dynamic webpages where some parts -of the page is loaded dynamically through multiple requests. While +of the page are loaded dynamically through multiple requests. While this can be quite tricky, the `Network`-tool in the Developer Tools greatly facilitates this task. To demonstrate the Network-tool, let's take a look at the page `quotes.toscrape.com/scroll`_. The page is quite similar to the basic `quotes.toscrape.com`_-page, -but instead of the above-mentioned ``Next``-button, the page +but instead of the above-mentioned ``Next`` button, the page automatically loads new quotes when you scroll to the bottom. We could go ahead and try out different XPaths directly, but instead we'll check another quite useful command from the scrapy shell:: - >>> scrapy shell "quotes.toscrape.com/scroll" + $ scrapy shell "quotes.toscrape.com/scroll" (...) >>> view(response) @@ -155,14 +174,14 @@ bar with the word ``Loading...``. :height: 296 :alt: Response from quotes.toscrape.com/scroll -The ``view(response)``-command let's us view the response our +The ``view(response)`` command let's us view the response our shell or later our spider receives from the server. Here we see that some basic template is loaded which includes the title, the login-button and the footer, but the quotes are missing. This tells us that the quotes are being loaded from a different request than ``quotes.toscrape/scroll``. -If you click on the ``Network``-tab, you will probably only see +If you click on the ``Network`` tab, you will probably only see two entries. The first thing we do is enable persistent logs by clicking on ``Persist Logs``. If this option is disabled, the log is automatically cleared each time you navigate to a different @@ -186,8 +205,8 @@ you can now inspect the request. In ``Headers`` you'll find details about the request headers, such as the URL, the method, the IP-address, and so on. We'll ignore the other tabs and click directly on ``Reponse``. -What you should see in the ``Preview``-pane is the rendered HTML-code, -that is exactly what we saw when we called ``view(response`` in the +What you should see in the ``Preview`` pane is the rendered HTML-code, +that is exactly what we saw when we called ``view(response)`` in the shell. Accordingly the ``type`` of the request in the log is ``html``. The other requests have types like ``css`` or ``js``, but what interests us is the one request called ``quotes?page=1`` with the @@ -219,8 +238,7 @@ also request each page to get every quote on the site:: def parse(self, response): data = json.loads(response.text) for quote in data["quotes"]: - quote = quote["text"] - print(quote) + yield {"quote": quote["text"] if data["has_next"]: self.page += 1 url = "http://quotes.toscrape.com/api/quotes?page={}".format(self.page) @@ -230,9 +248,9 @@ This spider starts at the first page of the quotes-API. With each response, we parse the ``response.text`` and assign it to ``data``. This lets us operate on the JSON-object like on a Python dictionary. We iterate through the ``quotes`` and print out the ``quote["text"]``. -If the handy ``has_next``-element is ``true`` (try loading -`http://quotes.toscrape.com/api/quotes?page=10`_ in your browser or a -page-number greater than 10), we increment the ``page``-attribute +If the handy ``has_next`` element is ``true`` (try loading +`quotes.toscrape.com/api/quotes?page=10`_ in your browser or a +page-number greater than 10), we increment the ``page`` attribute and ``yield`` a new request, inserting the incremented page-number into our ``url``. @@ -245,4 +263,6 @@ to identifying the correct request and replicating it in your spider. .. _Developer Tools: https://en.wikipedia.org/wiki/Web_development_tools .. _quotes.toscrape.com: http://quotes.toscrape.com .. _quotes.toscrape.com/scroll: quotes.toscrape.com/scroll/ +.. _quotes.toscrape.com/api/quotes?page=10: http://quotes.toscrape.com/api/quotes?page=10 +.. _has-class-extension: https://parsel.readthedocs.io/en/latest/usage.html#other-xpath-extensions From e98e7f8506b401f80fa193faa741c2094d7b62d7 Mon Sep 17 00:00:00 2001 From: testingcan Date: Thu, 23 Aug 2018 14:50:49 +0200 Subject: [PATCH 136/889] Added missing curly brace --- docs/topics/developer-tools.rst | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/docs/topics/developer-tools.rst b/docs/topics/developer-tools.rst index 6bd2c052a..c1976258d 100644 --- a/docs/topics/developer-tools.rst +++ b/docs/topics/developer-tools.rst @@ -238,7 +238,7 @@ also request each page to get every quote on the site:: def parse(self, response): data = json.loads(response.text) for quote in data["quotes"]: - yield {"quote": quote["text"] + yield {"quote": quote["text"]} if data["has_next"]: self.page += 1 url = "http://quotes.toscrape.com/api/quotes?page={}".format(self.page) From 79de3d569a3b50b3a07ced99d8e482862a979e88 Mon Sep 17 00:00:00 2001 From: Raphael Wuillemier Date: Thu, 23 Aug 2018 16:19:13 +0200 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zPF@muy>GdNaw~g|?cQ6&7*S=TGuPC7Hs>g+dDZKT1zHhTO(`ziiSG%QxF(^>w}MaH2o&z?ShyvTWL%w^smt z#`dPH&bqAR^T+w3DkjWs@{UXBd0t*uN(|whcMuV-S643HbA(6bE!z!m*_jzlalmeb zoUXV8Z^iaY8W|hE(w7gMj4vSluzNqju=$O&A$5W^{wE}57XP5W+@(eOg{75Y%1zX%ZzbHEpxkidsd!yGS-A-0x!S=0| z`qc7lSJO6QZaFuRmljo)!nV}{$LqJ)eK|FnG#+Ssv~q6J@p<;{{OfFywAw#qQYv(1 jl!O{G=T>r4J~Qu^u+32 Date: Fri, 24 Aug 2018 15:18:16 -0400 Subject: [PATCH 138/889] PEP8 ofsite middleware --- scrapy/spidermiddlewares/offsite.py | 16 +++++++++------- 1 file changed, 9 insertions(+), 7 deletions(-) diff --git a/scrapy/spidermiddlewares/offsite.py b/scrapy/spidermiddlewares/offsite.py index 310166cad..232e96cbb 100644 --- a/scrapy/spidermiddlewares/offsite.py +++ b/scrapy/spidermiddlewares/offsite.py @@ -3,7 +3,6 @@ Offsite Spider Middleware See documentation in docs/topics/spider-middleware.rst """ - import re import logging import warnings @@ -35,8 +34,9 @@ class OffsiteMiddleware(object): domain = urlparse_cached(x).hostname if domain and domain not in self.domains_seen: self.domains_seen.add(domain) - logger.debug("Filtered offsite request to %(domain)r: %(request)s", - {'domain': domain, 'request': x}, extra={'spider': spider}) + logger.debug( + "Filtered offsite request to %(domain)r: %(request)s", + {'domain': domain, 'request': x}, extra={'spider': spider}) self.stats.inc_value('offsite/domains', spider=spider) self.stats.inc_value('offsite/filtered', spider=spider) else: @@ -52,13 +52,15 @@ class OffsiteMiddleware(object): """Override this method to implement a different offsite policy""" allowed_domains = getattr(spider, 'allowed_domains', None) if not allowed_domains: - return re.compile('') # allow all by default + return re.compile('') # allow all by default url_pattern = re.compile("^https?://.*$") for domain in allowed_domains: if url_pattern.match(domain): - warnings.warn("allowed_domains accepts only domains, not URLs. Ignoring URL entry %s in allowed_domains." % domain, URLWarning) - - regex = r'^(.*\.)?(%s)$' % '|'.join(re.escape(d) for d in allowed_domains if d is not None) + message = ("allowed_domains accepts only domains, not URLs. " + "Ignoring URL entry %s in allowed_domains." % domain) + warnings.warn(message, URLWarning) + domains = [re.escape(d) for d in allowed_domains if d is not None] + regex = r'^(.*\.)?(%s)$' % '|'.join(domains) return re.compile(regex) def spider_opened(self, spider): From c02cfa574cc47d6b086cc66025ddef9f3174ac02 Mon Sep 17 00:00:00 2001 From: Vostretsov Nikita Date: Wed, 29 Aug 2018 11:21:55 +0000 Subject: [PATCH 139/889] remove comma --- docs/topics/signals.rst | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/docs/topics/signals.rst b/docs/topics/signals.rst index cf7b8db2f..ff07b9d55 100644 --- a/docs/topics/signals.rst +++ b/docs/topics/signals.rst @@ -285,7 +285,7 @@ request_reached_downloader .. signal:: request_reached_downloader .. function:: request_reached_downloader(request, spider) - Sent when a :class:`~scrapy.http.Request`, reached downloader. + Sent when a :class:`~scrapy.http.Request` reached downloader. The signal does not support returning deferreds from their handlers. From 8dbbbd13950dcb21dda759b073c64ffdca85c2d6 Mon Sep 17 00:00:00 2001 From: Stas Glubokiy Date: Mon, 3 Sep 2018 20:07:37 +0300 Subject: [PATCH 140/889] Use request_cls attribute in contract definition --- docs/topics/contracts.rst | 5 +++-- scrapy/contracts/__init__.py | 15 +++++++++------ tests/test_contracts.py | 2 +- 3 files changed, 13 insertions(+), 9 deletions(-) diff --git a/docs/topics/contracts.rst b/docs/topics/contracts.rst index ada6fd227..70f20d4ed 100644 --- a/docs/topics/contracts.rst +++ b/docs/topics/contracts.rst @@ -86,8 +86,9 @@ override three methods: .. method:: Contract.adjust_request_args(args) This receives a ``dict`` as an argument containing default arguments - for request object. :class:`~scrapy.http.Request` is used - if ``request_cls`` is not set on ``args``. + for request object. :class:`~scrapy.http.Request` is used by default, + but this can be changed with the ``request_cls`` attribute. + If multiple contracts in chain have this attribute defined, the last one is used. Must return the same or a modified version of it. diff --git a/scrapy/contracts/__init__.py b/scrapy/contracts/__init__.py index 801c18e73..851a26a8e 100644 --- a/scrapy/contracts/__init__.py +++ b/scrapy/contracts/__init__.py @@ -4,7 +4,6 @@ from functools import wraps from inspect import getmembers from unittest import TestCase -from scrapy import FormRequest from scrapy.http import Request from scrapy.utils.spider import iterate_spider_output from scrapy.utils.python import get_spec @@ -50,14 +49,17 @@ class ContractsManager(object): def from_method(self, method, results): contracts = self.extract_contracts(method) if contracts: - # prepare request arguments - kwargs = {'callback': method} + request_cls = Request + for contract in contracts: + if contract.request_cls is not None: + request_cls = contract.request_cls + + # calculate request args + args, kwargs = get_spec(request_cls.__init__) + kwargs['callback'] = method for contract in contracts: kwargs = contract.adjust_request_args(kwargs) - request_cls = kwargs.pop('request_cls', Request) - - args, _ = get_spec(request_cls.__init__) args.remove('self') # check if all positional arguments are defined in kwargs @@ -98,6 +100,7 @@ class ContractsManager(object): class Contract(object): """ Abstract class for contracts """ + request_cls = None def __init__(self, method, *args): self.testcase_pre = _create_testcase(method, '@%s pre-hook' % self.name) diff --git a/tests/test_contracts.py b/tests/test_contracts.py index c35b068a4..fc5c94771 100644 --- a/tests/test_contracts.py +++ b/tests/test_contracts.py @@ -27,9 +27,9 @@ class ResponseMock(object): class CustomFormContract(Contract): name = 'custom_form' + request_cls = FormRequest def adjust_request_args(self, args): - args['request_cls'] = FormRequest args['formdata'] = {'name': 'scrapy'} return args From e65f7e0c91ccb16525bb318cb50339979387fdbf Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Daniel=20Gra=C3=B1a?= Date: Wed, 5 Sep 2018 10:49:46 -0300 Subject: [PATCH 141/889] Working POC for authenticating telnet console --- scrapy/extensions/telnet.py | 25 ++++++++++++++++++++++--- 1 file changed, 22 insertions(+), 3 deletions(-) diff --git a/scrapy/extensions/telnet.py b/scrapy/extensions/telnet.py index 3024ddfaa..5e9fce7c5 100644 --- a/scrapy/extensions/telnet.py +++ b/scrapy/extensions/telnet.py @@ -22,6 +22,7 @@ from scrapy import signals from scrapy.utils.trackref import print_live_refs from scrapy.utils.engine import print_engine_status from scrapy.utils.reactor import listen_tcp +from scrapy.utils.decorators import defers try: import guppy @@ -49,6 +50,8 @@ class TelnetConsole(protocol.ServerFactory): self.noisy = False self.portrange = [int(x) for x in crawler.settings.getlist('TELNETCONSOLE_PORT')] self.host = crawler.settings['TELNETCONSOLE_HOST'] + self.username = crawler.settings.get('TELNETCONSOLE_USERNAME', 'scrapy') + self.password = crawler.settings.get('TELNETCONSOLE_PASSWORD', 'scrapy') self.crawler.signals.connect(self.start_listening, signals.engine_started) self.crawler.signals.connect(self.stop_listening, signals.engine_stopped) @@ -67,9 +70,25 @@ class TelnetConsole(protocol.ServerFactory): self.port.stopListening() def protocol(self): - telnet_vars = self._get_telnet_vars() - return telnet.TelnetTransport(telnet.TelnetBootstrapProtocol, - insults.ServerProtocol, manhole.Manhole, telnet_vars) + class Portal: + """An implementation of IPortal""" + @defers + def login(self_, credentials, mind, *interfaces): + if not (credentials.username == self.username + and credentials.checkPassword(self.password)): + raise ValueError("Invalid credentials") + + protocol = telnet.TelnetBootstrapProtocol( + insults.ServerProtocol, + manhole.Manhole, + self._get_telnet_vars() + ) + return (interfaces[0], protocol, lambda: None) + + return telnet.TelnetTransport( + telnet.AuthenticatingTelnetProtocol, + Portal() + ) def _get_telnet_vars(self): # Note: if you add entries here also update topics/telnetconsole.rst From eb64214c8a0053627e625debdb55373c8e17ef1d Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Daniel=20Gra=C3=B1a?= Date: Wed, 5 Sep 2018 10:54:40 -0300 Subject: [PATCH 142/889] Move telnetconsole settings defaults to scrapy defaults --- scrapy/extensions/telnet.py | 4 ++-- scrapy/settings/default_settings.py | 2 ++ 2 files changed, 4 insertions(+), 2 deletions(-) diff --git a/scrapy/extensions/telnet.py b/scrapy/extensions/telnet.py index 5e9fce7c5..93342f225 100644 --- a/scrapy/extensions/telnet.py +++ b/scrapy/extensions/telnet.py @@ -50,8 +50,8 @@ class TelnetConsole(protocol.ServerFactory): self.noisy = False self.portrange = [int(x) for x in crawler.settings.getlist('TELNETCONSOLE_PORT')] self.host = crawler.settings['TELNETCONSOLE_HOST'] - self.username = crawler.settings.get('TELNETCONSOLE_USERNAME', 'scrapy') - self.password = crawler.settings.get('TELNETCONSOLE_PASSWORD', 'scrapy') + self.username = crawler.settings['TELNETCONSOLE_USERNAME'] + self.password = crawler.settings['TELNETCONSOLE_PASSWORD'] self.crawler.signals.connect(self.start_listening, signals.engine_started) self.crawler.signals.connect(self.stop_listening, signals.engine_stopped) diff --git a/scrapy/settings/default_settings.py b/scrapy/settings/default_settings.py index ca004aedd..2b7bc173c 100644 --- a/scrapy/settings/default_settings.py +++ b/scrapy/settings/default_settings.py @@ -277,6 +277,8 @@ USER_AGENT = 'Scrapy/%s (+https://scrapy.org)' % import_module('scrapy').__versi TELNETCONSOLE_ENABLED = 1 TELNETCONSOLE_PORT = [6023, 6073] TELNETCONSOLE_HOST = '127.0.0.1' +TELNETCONSOLE_USERNAME = 'scrapy' +TELNETCONSOLE_PASSWORD = 'scrapy' SPIDER_CONTRACTS = {} SPIDER_CONTRACTS_BASE = { From 25ac4691b414e7c18a4e9dec3bb6a85563d2488d Mon Sep 17 00:00:00 2001 From: Mikhail Korobov Date: Thu, 9 Aug 2018 03:32:46 +0500 Subject: [PATCH 143/889] require parsel 1.5+ --- requirements-py2.txt | 2 +- requirements-py3.txt | 2 +- setup.py | 2 +- 3 files changed, 3 insertions(+), 3 deletions(-) diff --git a/requirements-py2.txt b/requirements-py2.txt index 03b33d02d..0771aae3a 100644 --- a/requirements-py2.txt +++ b/requirements-py2.txt @@ -6,5 +6,5 @@ queuelib w3lib>=1.17.0 six>=1.5.2 PyDispatcher>=2.0.5 -parsel>=1.4 +parsel>=1.5 service_identity diff --git a/requirements-py3.txt b/requirements-py3.txt index b38c4cc09..5a5d4c95a 100644 --- a/requirements-py3.txt +++ b/requirements-py3.txt @@ -6,5 +6,5 @@ queuelib>=1.1.1 w3lib>=1.17.0 six>=1.5.2 PyDispatcher>=2.0.5 -parsel>=1.4 +parsel>=1.5 service_identity diff --git a/setup.py b/setup.py index c37919cda..8c47f67ce 100644 --- a/setup.py +++ b/setup.py @@ -71,7 +71,7 @@ setup( 'pyOpenSSL', 'cssselect>=0.9', 'six>=1.5.2', - 'parsel>=1.4', + 'parsel>=1.5', 'PyDispatcher>=2.0.5', 'service_identity', ], From 0ccead6681c9e2bf1902cbc1d4bde543be7d73e7 Mon Sep 17 00:00:00 2001 From: Mikhail Korobov Date: Wed, 15 Aug 2018 16:16:36 +0500 Subject: [PATCH 144/889] DOC more Python 3 in examples --- docs/topics/commands.rst | 6 ++--- docs/topics/items.rst | 6 ++--- docs/topics/jobs.rst | 4 ++-- docs/topics/loaders.rst | 14 ++++++------ docs/topics/selectors.rst | 48 +++++++++++++++++++-------------------- docs/topics/settings.rst | 2 +- 6 files changed, 40 insertions(+), 40 deletions(-) diff --git a/docs/topics/commands.rst b/docs/topics/commands.rst index 3088017cb..ef9c45196 100644 --- a/docs/topics/commands.rst +++ b/docs/topics/commands.rst @@ -458,9 +458,9 @@ Usage example:: >>> STATUS DEPTH LEVEL 1 <<< # Scraped Items ------------------------------------------------------------ - [{'name': u'Example item', - 'category': u'Furniture', - 'length': u'12 cm'}] + [{'name': 'Example item', + 'category': 'Furniture', + 'length': '12 cm'}] # Requests ----------------------------------------------------------------- [] diff --git a/docs/topics/items.rst b/docs/topics/items.rst index 4423bbda2..ae44aecd3 100644 --- a/docs/topics/items.rst +++ b/docs/topics/items.rst @@ -86,7 +86,7 @@ Creating items :: >>> product = Product(name='Desktop PC', price=1000) - >>> print product + >>> print(product) Product(name='Desktop PC', price=1000) Getting field values @@ -161,11 +161,11 @@ Other common tasks Copying items:: >>> product2 = Product(product) - >>> print product2 + >>> print(product2) Product(name='Desktop PC', price=1000) >>> product3 = product2.copy() - >>> print product3 + >>> print(product3) Product(name='Desktop PC', price=1000) Creating dicts from items:: diff --git a/docs/topics/jobs.rst b/docs/topics/jobs.rst index 06c7fff3d..8e1574376 100644 --- a/docs/topics/jobs.rst +++ b/docs/topics/jobs.rst @@ -84,7 +84,7 @@ So, for example, this won't work:: return scrapy.Request('http://www.example.com', callback=lambda r: self.other_callback(r, somearg)) def other_callback(self, response, somearg): - print "the argument passed is:", somearg + print("the argument passed is: %s" % somearg) But this will:: @@ -94,7 +94,7 @@ But this will:: def other_callback(self, response): somearg = response.meta['somearg'] - print "the argument passed is:", somearg + print("the argument passed is: %s" % somearg) If you wish to log the requests that couldn't be serialized, you can set the :setting:`SCHEDULER_DEBUG` setting to ``True`` in the project's settings page. diff --git a/docs/topics/loaders.rst b/docs/topics/loaders.rst index a895b535c..f3b6aa4a1 100644 --- a/docs/topics/loaders.rst +++ b/docs/topics/loaders.rst @@ -678,10 +678,10 @@ Here is a list of all built-in processors: >>> from scrapy.loader.processors import Join >>> proc = Join() >>> proc(['one', 'two', 'three']) - u'one two three' + 'one two three' >>> proc = Join('
') >>> proc(['one', 'two', 'three']) - u'one
two
three' + 'one
two
three' .. class:: Compose(\*functions, \**default_loader_context) @@ -744,9 +744,9 @@ Here is a list of all built-in processors: ... return None if x == 'world' else x ... >>> from scrapy.loader.processors import MapCompose - >>> proc = MapCompose(filter_world, unicode.upper) - >>> proc([u'hello', u'world', u'this', u'is', u'scrapy']) - [u'HELLO, u'THIS', u'IS', u'SCRAPY'] + >>> proc = MapCompose(filter_world, str.upper) + >>> proc(['hello', 'world', 'this', 'is', 'scrapy']) + ['HELLO, 'THIS', 'IS', 'SCRAPY'] As with the Compose processor, functions can receive Loader contexts, and constructor keyword arguments are used as default context values. See @@ -772,7 +772,7 @@ Here is a list of all built-in processors: >>> import json >>> proc_single_json_str = Compose(json.loads, SelectJmes("foo")) >>> proc_single_json_str('{"foo": "bar"}') - u'bar' + 'bar' >>> proc_json_list = Compose(json.loads, MapCompose(SelectJmes('foo'))) >>> proc_json_list('[{"foo":"bar"}, {"baz":"tar"}]') - [u'bar'] + ['bar'] diff --git a/docs/topics/selectors.rst b/docs/topics/selectors.rst index 8ac40c3cc..25c1f0aab 100644 --- a/docs/topics/selectors.rst +++ b/docs/topics/selectors.rst @@ -235,17 +235,17 @@ Here's an example used to extract image names from the :ref:`HTML code ` above:: >>> response.xpath('//a[contains(@href, "image")]/text()').re(r'Name:\s*(.*)') - [u'My image 1', - u'My image 2', - u'My image 3', - u'My image 4', - u'My image 5'] + ['My image 1', + 'My image 2', + 'My image 3', + 'My image 4', + 'My image 5'] There's an additional helper reciprocating ``.extract_first()`` for ``.re()``, named ``.re_first()``. Use it to extract just the first matching string:: >>> response.xpath('//a[contains(@href, "image")]/text()').re_first(r'Name:\s*(.*)') - u'My image 1' + 'My image 1' .. _topics-selectors-relative-xpaths: @@ -431,26 +431,26 @@ with groups of itemscopes and corresponding itemprops:: ... print " properties:", props.extract() ... print - current scope: [u'http://schema.org/Product'] - properties: [u'name', u'aggregateRating', u'offers', u'description', u'review', u'review'] + current scope: ['http://schema.org/Product'] + properties: ['name', 'aggregateRating', 'offers', 'description', 'review', 'review'] - current scope: [u'http://schema.org/AggregateRating'] - properties: [u'ratingValue', u'reviewCount'] + current scope: ['http://schema.org/AggregateRating'] + properties: ['ratingValue', 'reviewCount'] - current scope: [u'http://schema.org/Offer'] - properties: [u'price', u'availability'] + current scope: ['http://schema.org/Offer'] + properties: ['price', 'availability'] - current scope: [u'http://schema.org/Review'] - properties: [u'name', u'author', u'datePublished', u'reviewRating', u'description'] + current scope: ['http://schema.org/Review'] + properties: ['name', 'author', 'datePublished', 'reviewRating', 'description'] - current scope: [u'http://schema.org/Rating'] - properties: [u'worstRating', u'ratingValue', u'bestRating'] + current scope: ['http://schema.org/Rating'] + properties: ['worstRating', 'ratingValue', 'bestRating'] - current scope: [u'http://schema.org/Review'] - properties: [u'name', u'author', u'datePublished', u'reviewRating', u'description'] + current scope: ['http://schema.org/Review'] + properties: ['name', 'author', 'datePublished', 'reviewRating', 'description'] - current scope: [u'http://schema.org/Rating'] - properties: [u'worstRating', u'ratingValue', u'bestRating'] + current scope: ['http://schema.org/Rating'] + properties: ['worstRating', 'ratingValue', 'bestRating'] >>> @@ -543,22 +543,22 @@ Example:: This gets all first ``
  • `` elements under whatever it is its parent:: >>> xp("//li[1]") - [u'
  • 1
    • ', u'
  • 4
    • '] + ['
  • 1
    • ', '
  • 4
    • '] And this gets the first ``
  • `` element in the whole document:: >>> xp("(//li)[1]") - [u'
  • 1
    • '] + ['
  • 1
    • '] This gets all first ``
  • `` elements under an ``
      `` parent:: >>> xp("//ul/li[1]") - [u'
    • 1
      • ', u'
    • 4
      • '] + ['
    • 1
      • ', '
    • 4
      • '] And this gets the first ``
    • `` element under an ``
        `` parent in the whole document:: >>> xp("(//ul/li)[1]") - [u'
      • 1
        • '] + ['
      • 1
        • '] When querying by class, consider using CSS ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ diff --git a/docs/topics/settings.rst b/docs/topics/settings.rst index 1f1217770..47b6cf13d 100644 --- a/docs/topics/settings.rst +++ b/docs/topics/settings.rst @@ -871,7 +871,7 @@ LOG_STDOUT Default: ``False`` If ``True``, all standard output (and error) of your process will be redirected -to the log. For example if you ``print 'hello'`` it will appear in the Scrapy +to the log. For example if you ``print('hello')`` it will appear in the Scrapy log. .. setting:: LOG_SHORT_NAMES From 395d9d033a39ae9e82337ce50cffabd1ecedb702 Mon Sep 17 00:00:00 2001 From: Mikhail Korobov Date: Wed, 15 Aug 2018 16:16:57 +0500 Subject: [PATCH 145/889] add pytest temp files to gitignore --- .gitignore | 1 + 1 file changed, 1 insertion(+) diff --git a/.gitignore b/.gitignore index ff6e2ea65..7392ed31e 100644 --- a/.gitignore +++ b/.gitignore @@ -15,6 +15,7 @@ htmlcov/ .pytest_cache/ .coverage.* .cache/ +.pytest_cache/ # Windows Thumbs.db From ca27010d4f8c35d1c98259e56be797a18b044304 Mon Sep 17 00:00:00 2001 From: Mikhail Korobov Date: Wed, 15 Aug 2018 16:22:56 +0500 Subject: [PATCH 146/889] DOC .extract_first() -> .get() --- docs/intro/overview.rst | 6 ++--- docs/intro/tutorial.rst | 49 +++++++++++++++++++++-------------------- docs/topics/shell.rst | 2 +- docs/topics/spiders.rst | 10 ++++----- 4 files changed, 34 insertions(+), 33 deletions(-) diff --git a/docs/intro/overview.rst b/docs/intro/overview.rst index 6f1c2c43f..9d7c94d39 100644 --- a/docs/intro/overview.rst +++ b/docs/intro/overview.rst @@ -34,11 +34,11 @@ http://quotes.toscrape.com, following the pagination:: def parse(self, response): for quote in response.css('div.quote'): yield { - 'text': quote.css('span.text::text').extract_first(), - 'author': quote.xpath('span/small/text()').extract_first(), + 'text': quote.css('span.text::text').get(), + 'author': quote.xpath('span/small/text()').get(), } - next_page = response.css('li.next a::attr("href")').extract_first() + next_page = response.css('li.next a::attr("href")').get() if next_page is not None: yield response.follow(next_page, self.parse) diff --git a/docs/intro/tutorial.rst b/docs/intro/tutorial.rst index fa6dc274d..a24cf0f5b 100644 --- a/docs/intro/tutorial.rst +++ b/docs/intro/tutorial.rst @@ -269,23 +269,24 @@ The other thing is that the result of calling ``.extract()`` is a list, because we're dealing with an instance of :class:`~scrapy.selector.SelectorList`. When you know you just want the first result, as in this case, you can do:: - >>> response.css('title::text').extract_first() + >>> response.css('title::text').get() 'Quotes to Scrape' As an alternative, you could've written:: - >>> response.css('title::text')[0].extract() + >>> response.css('title::text')[0].get() 'Quotes to Scrape' -However, using ``.extract_first()`` avoids an ``IndexError`` and returns -``None`` when it doesn't find any element matching the selection. +However, using ``.get()`` directly on a :class:`~scrapy.selector.SelectorList` +instance avoids an ``IndexError`` and returns ``None`` when it doesn't +find any element matching the selection. There's a lesson here: for most scraping code, you want it to be resilient to errors due to things not being found on a page, so that even if some parts fail to be scraped, you can at least get **some** data. Besides the :meth:`~scrapy.selector.Selector.extract` and -:meth:`~scrapy.selector.SelectorList.extract_first` methods, you can also use +:meth:`~scrapy.selector.SelectorList.get` methods, you can also use the :meth:`~scrapy.selector.Selector.re` method to extract using `regular expressions`:: @@ -314,7 +315,7 @@ Besides `CSS`_, Scrapy selectors also support using `XPath`_ expressions:: >>> response.xpath('//title') [] - >>> response.xpath('//title/text()').extract_first() + >>> response.xpath('//title/text()').get() 'Quotes to Scrape' XPath expressions are very powerful, and are the foundation of Scrapy @@ -383,10 +384,10 @@ variable, so that we can run our CSS selectors directly on a particular quote:: Now, let's extract ``title``, ``author`` and the ``tags`` from that quote using the ``quote`` object we just created:: - >>> title = quote.css("span.text::text").extract_first() + >>> title = quote.css("span.text::text").get() >>> title '“The world as we have created it is a process of our thinking. It cannot be changed without changing our thinking.”' - >>> author = quote.css("small.author::text").extract_first() + >>> author = quote.css("small.author::text").get() >>> author 'Albert Einstein' @@ -401,8 +402,8 @@ Having figured out how to extract each bit, we can now iterate over all the quotes elements and put them together into a Python dictionary:: >>> for quote in response.css("div.quote"): - ... text = quote.css("span.text::text").extract_first() - ... author = quote.css("small.author::text").extract_first() + ... text = quote.css("span.text::text").get() + ... author = quote.css("small.author::text").get() ... tags = quote.css("div.tags a.tag::text").extract() ... print(dict(text=text, author=author, tags=tags)) {'tags': ['change', 'deep-thoughts', 'thinking', 'world'], 'author': 'Albert Einstein', 'text': '“The world as we have created it is a process of our thinking. It cannot be changed without changing our thinking.”'} @@ -434,8 +435,8 @@ in the callback, as you can see below:: def parse(self, response): for quote in response.css('div.quote'): yield { - 'text': quote.css('span.text::text').extract_first(), - 'author': quote.css('small.author::text').extract_first(), + 'text': quote.css('span.text::text').get(), + 'author': quote.css('small.author::text').get(), 'tags': quote.css('div.tags a.tag::text').extract(), } @@ -508,14 +509,14 @@ markup: We can try extracting it in the shell:: - >>> response.css('li.next a').extract_first() + >>> response.css('li.next a').get() 'Next ' This gets the anchor element, but we want the attribute ``href``. For that, Scrapy supports a CSS extension that let's you select the attribute contents, like this:: - >>> response.css('li.next a::attr(href)').extract_first() + >>> response.css('li.next a::attr(href)').get() '/page/2/' Let's see now our spider modified to recursively follow the link to the next @@ -533,12 +534,12 @@ page, extracting data from it:: def parse(self, response): for quote in response.css('div.quote'): yield { - 'text': quote.css('span.text::text').extract_first(), - 'author': quote.css('small.author::text').extract_first(), + 'text': quote.css('span.text::text').get(), + 'author': quote.css('small.author::text').get(), 'tags': quote.css('div.tags a.tag::text').extract(), } - next_page = response.css('li.next a::attr(href)').extract_first() + next_page = response.css('li.next a::attr(href)').get() if next_page is not None: next_page = response.urljoin(next_page) yield scrapy.Request(next_page, callback=self.parse) @@ -584,12 +585,12 @@ As a shortcut for creating Request objects you can use def parse(self, response): for quote in response.css('div.quote'): yield { - 'text': quote.css('span.text::text').extract_first(), - 'author': quote.css('span small::text').extract_first(), + 'text': quote.css('span.text::text').get(), + 'author': quote.css('span small::text').get(), 'tags': quote.css('div.tags a.tag::text').extract(), } - next_page = response.css('li.next a::attr(href)').extract_first() + next_page = response.css('li.next a::attr(href)').get() if next_page is not None: yield response.follow(next_page, callback=self.parse) @@ -641,7 +642,7 @@ this time for scraping author information:: def parse_author(self, response): def extract_with_css(query): - return response.css(query).extract_first().strip() + return response.css(query).get().strip() yield { 'name': extract_with_css('h3.author-title::text'), @@ -710,11 +711,11 @@ with a specific tag, building the URL based on the argument:: def parse(self, response): for quote in response.css('div.quote'): yield { - 'text': quote.css('span.text::text').extract_first(), - 'author': quote.css('small.author::text').extract_first(), + 'text': quote.css('span.text::text').get(), + 'author': quote.css('small.author::text').get(), } - next_page = response.css('li.next a::attr(href)').extract_first() + next_page = response.css('li.next a::attr(href)').get() if next_page is not None: yield response.follow(next_page, self.parse) diff --git a/docs/topics/shell.rst b/docs/topics/shell.rst index 11ab199f2..9de6abef7 100644 --- a/docs/topics/shell.rst +++ b/docs/topics/shell.rst @@ -179,7 +179,7 @@ all start with the ``[s]`` prefix):: After that, we can start playing with the objects:: - >>> response.xpath('//title/text()').extract_first() + >>> response.xpath('//title/text()').get() 'Scrapy | A Fast and Powerful Scraping and Web Crawling Framework' >>> fetch("https://reddit.com") diff --git a/docs/topics/spiders.rst b/docs/topics/spiders.rst index 697732b47..4505b7315 100644 --- a/docs/topics/spiders.rst +++ b/docs/topics/spiders.rst @@ -434,8 +434,8 @@ Let's now take a look at an example CrawlSpider with rules:: self.logger.info('Hi, this is an item page! %s', response.url) item = scrapy.Item() item['id'] = response.xpath('//td[@id="item_id"]/text()').re(r'ID: (\d+)') - item['name'] = response.xpath('//td[@id="item_name"]/text()').extract() - item['description'] = response.xpath('//td[@id="item_description"]/text()').extract() + item['name'] = response.xpath('//td[@id="item_name"]/text()').get() + item['description'] = response.xpath('//td[@id="item_description"]/text()').get() return item @@ -548,9 +548,9 @@ These spiders are pretty easy to use, let's have a look at one example:: self.logger.info('Hi, this is a <%s> node!: %s', self.itertag, ''.join(node.extract())) item = TestItem() - item['id'] = node.xpath('@id').extract() - item['name'] = node.xpath('name').extract() - item['description'] = node.xpath('description').extract() + item['id'] = node.xpath('@id').get() + item['name'] = node.xpath('name').get() + item['description'] = node.xpath('description').get() return item Basically what we did up there was to create a spider that downloads a feed from From d32c4deaa99bf0155542d1b508b5535065b5d7a9 Mon Sep 17 00:00:00 2001 From: Mikhail Korobov Date: Wed, 15 Aug 2018 16:23:31 +0500 Subject: [PATCH 147/889] DOC update Scrapy selectors tutorial to match parsel's tutorial better --- docs/topics/selectors.rst | 471 +++++++++++++++++++++++++++----------- 1 file changed, 340 insertions(+), 131 deletions(-) diff --git a/docs/topics/selectors.rst b/docs/topics/selectors.rst index 25c1f0aab..00158ecf1 100644 --- a/docs/topics/selectors.rst +++ b/docs/topics/selectors.rst @@ -6,7 +6,7 @@ Selectors When you're scraping web pages, the most common task you need to perform is to extract data from the HTML source. There are several libraries available to -achieve this: +achieve this, such as: * `BeautifulSoup`_ is a very popular web scraping library among Python programmers which constructs a Python object based on the structure of the @@ -25,8 +25,9 @@ either by `XPath`_ or `CSS`_ expressions. used with HTML. `CSS`_ is a language for applying styles to HTML documents. It defines selectors to associate those styles with specific HTML elements. -Scrapy selectors are built over the `lxml`_ library, which means they're very -similar in speed and parsing accuracy. +Scrapy selectors are powered by `parsel`_ library, which uses `lxml`_ library +under the hood. It means Scrapy selectors are very similar in speed and +parsing accuracy to lxml. This page explains how selectors work and describes their API which is very small and simple, unlike the `lxml`_ API which is much bigger because the @@ -42,7 +43,7 @@ For a complete reference of the selectors API see .. _cssselect: https://pypi.python.org/pypi/cssselect/ .. _XPath: https://www.w3.org/TR/xpath .. _CSS: https://www.w3.org/TR/selectors - +.. _parsel: https://parsel.readthedocs.io/ Using selectors =============== @@ -63,21 +64,32 @@ input type:: Constructing from text:: >>> body = 'good' - >>> Selector(text=body).xpath('//span/text()').extract() - [u'good'] + >>> Selector(text=body).xpath('//span/text()').get() + 'good' Constructing from response:: >>> response = HtmlResponse(url='http://example.com', body=body) - >>> Selector(response=response).xpath('//span/text()').extract() - [u'good'] + >>> Selector(response=response).xpath('//span/text()').get() + 'good' For convenience, response objects expose a selector on `.selector` attribute, -it's totally OK to use this shortcut when possible:: +it's totally OK to use this shortcut when possible. By using it you can +ensure the response body is parsed only once:: - >>> response.selector.xpath('//span/text()').extract() - [u'good'] + >>> response.selector.xpath('//span/text()').get() + 'good' +Querying responses using XPath and CSS is so common that responses include two +more shortcuts: ``response.xpath()`` and ``response.css()``:: + + >>> response.xpath('//span/text()').get() + 'good' + >>> response.css('span::text').get() + 'good' + +Usually there is no need to construct Scrapy selectors manually because of +these shortcuts. Using selectors --------------- @@ -90,7 +102,7 @@ documentation server: .. _topics-selectors-htmlcode: -Here's its HTML code: +For the sake of completeness, here's its full HTML code: .. literalinclude:: ../_static/selectors-sample1.html :language: html @@ -111,90 +123,179 @@ Since we're dealing with HTML, the selector will automatically use an HTML parse So, by looking at the :ref:`HTML code ` of that page, let's construct an XPath for selecting the text inside the title tag:: - >>> response.selector.xpath('//title/text()') - [] - -Querying responses using XPath and CSS is so common that responses include two -convenience shortcuts: ``response.xpath()`` and ``response.css()``:: - >>> response.xpath('//title/text()') - [] - >>> response.css('title::text') - [] + [] + +To actually extract the textual data, you must call the selector ``.get()`` +or ``.getall()`` methods, as follows:: + + >>> response.xpath('//title/text()').getall() + ['Example website'] + >>> response.xpath('//title/text()').get() + 'Example website' + +``.get()`` always returns a single result; if there are several matches, +content of a first match is returned; if there are no matches, None +is returned. ``.getall()`` returns a list with all results. + +Notice that CSS selectors can select text or attribute nodes using CSS3 +pseudo-elements:: + + >>> selector.css('title::text').get() + 'Example website' As you can see, ``.xpath()`` and ``.css()`` methods return a :class:`~scrapy.selector.SelectorList` instance, which is a list of new selectors. This API can be used for quickly selecting nested data:: - >>> response.css('img').xpath('@src').extract() - [u'image1_thumb.jpg', - u'image2_thumb.jpg', - u'image3_thumb.jpg', - u'image4_thumb.jpg', - u'image5_thumb.jpg'] + >>> response.css('img').xpath('@src').getall() + ['image1_thumb.jpg', + 'image2_thumb.jpg', + 'image3_thumb.jpg', + 'image4_thumb.jpg', + 'image5_thumb.jpg'] -To actually extract the textual data, you must call the selector ``.extract()`` -method, as follows:: +If you want to extract only the first matched element, you can call the +selector ``.get()`` (or its alias ``.extract_first()`` commonly used in +previous Scrapy versions):: - >>> response.xpath('//title/text()').extract() - [u'Example website'] + >>> response.xpath('//div[@id="images"]/a/text()').get() + 'Name: My image 1 ' -If you want to extract only first matched element, you can call the selector ``.extract_first()`` +It returns ``None`` if no element was found:: - >>> response.xpath('//div[@id="images"]/a/text()').extract_first() - u'Name: My image 1 ' - -It returns ``None`` if no element was found: - - >>> response.xpath('//div[@id="not-exists"]/text()').extract_first() is None + >>> response.xpath('//div[@id="not-exists"]/text()').get() is None True -A default return value can be provided as an argument, to be used instead of ``None``: +A default return value can be provided as an argument, to be used instead +of ``None``: - >>> response.xpath('//div[@id="not-exists"]/text()').extract_first(default='not-found') + >>> response.xpath('//div[@id="not-exists"]/text()').get(default='not-found') 'not-found' -Notice that CSS selectors can select text or attribute nodes using CSS3 -pseudo-elements:: +Instead of using e.g. ``'@src'`` XPath it is possible to query for attributes +using ``.attrib`` property of a :class:`~scrapy.selector.Selector`:: - >>> response.css('title::text').extract() - [u'Example website'] + >>> [img.attrib['src'] for img in response.css('img')] + ['image1_thumb.jpg', + 'image2_thumb.jpg', + 'image3_thumb.jpg', + 'image4_thumb.jpg', + 'image5_thumb.jpg'] + +As a shortcut, ``.attrib`` is also available on SelectorList directly; +it returns attributes for the first matching element:: + + >>> response.css('img').attrib['src'] + 'image1_thumb.jpg' + +This is most useful when only a single result is expected, e.g. when selecting +by id, or selecting unique elements on a web page:: + + >>> response.css('base').attrib['href'] + 'http://example.com/' Now we're going to get the base URL and some image links:: - >>> response.xpath('//base/@href').extract() - [u'http://example.com/'] + >>> response.xpath('//base/@href').get() + 'http://example.com/' - >>> response.css('base::attr(href)').extract() - [u'http://example.com/'] + >>> response.css('base::attr(href)').get() + 'http://example.com/' - >>> response.xpath('//a[contains(@href, "image")]/@href').extract() - [u'image1.html', - u'image2.html', - u'image3.html', - u'image4.html', - u'image5.html'] + >>> response.css('base').attrib['href'] + 'http://example.com/' - >>> response.css('a[href*=image]::attr(href)').extract() - [u'image1.html', - u'image2.html', - u'image3.html', - u'image4.html', - u'image5.html'] + >>> response.xpath('//a[contains(@href, "image")]/@href').getall() + ['image1.html', + 'image2.html', + 'image3.html', + 'image4.html', + 'image5.html'] - >>> response.xpath('//a[contains(@href, "image")]/img/@src').extract() - [u'image1_thumb.jpg', - u'image2_thumb.jpg', - u'image3_thumb.jpg', - u'image4_thumb.jpg', - u'image5_thumb.jpg'] + >>> response.css('a[href*=image]::attr(href)').getall() + ['image1.html', + 'image2.html', + 'image3.html', + 'image4.html', + 'image5.html'] - >>> response.css('a[href*=image] img::attr(src)').extract() - [u'image1_thumb.jpg', - u'image2_thumb.jpg', - u'image3_thumb.jpg', - u'image4_thumb.jpg', - u'image5_thumb.jpg'] + >>> response.xpath('//a[contains(@href, "image")]/img/@src').getall() + ['image1_thumb.jpg', + 'image2_thumb.jpg', + 'image3_thumb.jpg', + 'image4_thumb.jpg', + 'image5_thumb.jpg'] + + >>> response.css('a[href*=image] img::attr(src)').getall() + ['image1_thumb.jpg', + 'image2_thumb.jpg', + 'image3_thumb.jpg', + 'image4_thumb.jpg', + 'image5_thumb.jpg'] + +.. _topics-selectors-css-extensions: + +Extensions to CSS Selectors +--------------------------- + +Per W3C standards, `CSS selectors`_ do not support selecting text nodes +or attribute values. +But selecting these is so essential in a web scraping context +that Scrapy (parsel) implements a couple of **non-standard pseudo-elements**: + +* to select text nodes, use ``::text`` +* to select attribute values, use ``::attr(name)`` where *name* is the + name of the attribute that you want the value of + +.. warning:: + These pseudo-elements are Scrapy-/Parsel-specific. + They will most probably not work with other libraries like + `lxml`_ or `PyQuery`_. + +.. _PyQuery: https://pypi.python.org/pypi/pyquery + +Examples: + +* ``title::text`` selects children text nodes of a descendant ```` element:: + + >>> response.css('title::text').get() + 'Example website' + +* ``*::text`` selects all descendant text nodes of the current selector context:: + + >>> response.css('#images *::text').getall() + ['\n ', + 'Name: My image 1 ', + '\n ', + 'Name: My image 2 ', + '\n ', + 'Name: My image 3 ', + '\n ', + 'Name: My image 4 ', + '\n ', + 'Name: My image 5 ', + '\n '] + +* ``a::attr(href)`` selects the *href* attribute value of descendant links:: + + >>> response.css('a::attr(href)').getall() + ['image1.html', + 'image2.html', + 'image3.html', + 'image4.html', + 'image5.html'] + +.. note:: + You cannot chain these pseudo-elements. But in practice it would not + make much sense: text nodes do not have attributes, and attribute values + are string values already and do not have children nodes. + +.. note:: + See also: :ref:`selecting-attributes`. + + +.. _CSS Selectors: https://www.w3.org/TR/css3-selectors/#selectors .. _topics-selectors-nesting-selectors: @@ -206,22 +307,65 @@ of the same type, so you can call the selection methods for those selectors too. Here's an example:: >>> links = response.xpath('//a[contains(@href, "image")]') - >>> links.extract() - [u'<a href="image1.html">Name: My image 1 <br><img src="image1_thumb.jpg"></a>', - u'<a href="image2.html">Name: My image 2 <br><img src="image2_thumb.jpg"></a>', - u'<a href="image3.html">Name: My image 3 <br><img src="image3_thumb.jpg"></a>', - u'<a href="image4.html">Name: My image 4 <br><img src="image4_thumb.jpg"></a>', - u'<a href="image5.html">Name: My image 5 <br><img src="image5_thumb.jpg"></a>'] + >>> links.getall() + ['<a href="image1.html">Name: My image 1 <br><img src="image1_thumb.jpg"></a>', + '<a href="image2.html">Name: My image 2 <br><img src="image2_thumb.jpg"></a>', + '<a href="image3.html">Name: My image 3 <br><img src="image3_thumb.jpg"></a>', + '<a href="image4.html">Name: My image 4 <br><img src="image4_thumb.jpg"></a>', + '<a href="image5.html">Name: My image 5 <br><img src="image5_thumb.jpg"></a>'] >>> for index, link in enumerate(links): - ... args = (index, link.xpath('@href').extract(), link.xpath('img/@src').extract()) - ... print 'Link number %d points to url %s and image %s' % args + ... args = (index, link.xpath('@href').get(), link.xpath('img/@src').get()) + ... print('Link number %d points to url %r and image %r' % args) - Link number 0 points to url [u'image1.html'] and image [u'image1_thumb.jpg'] - Link number 1 points to url [u'image2.html'] and image [u'image2_thumb.jpg'] - Link number 2 points to url [u'image3.html'] and image [u'image3_thumb.jpg'] - Link number 3 points to url [u'image4.html'] and image [u'image4_thumb.jpg'] - Link number 4 points to url [u'image5.html'] and image [u'image5_thumb.jpg'] + Link number 0 points to url 'image1.html' and image 'image1_thumb.jpg' + Link number 1 points to url 'image2.html' and image 'image2_thumb.jpg' + Link number 2 points to url 'image3.html' and image 'image3_thumb.jpg' + Link number 3 points to url 'image4.html' and image 'image4_thumb.jpg' + Link number 4 points to url 'image5.html' and image 'image5_thumb.jpg' + +.. _selecting-attributes: + +Selecting element attributes +---------------------------- + +There are several ways to get a value of an attribute. First, one can use +XPath syntax:: + + >>> response.xpath("//a/@href").getall() + ['image1.html', 'image2.html', 'image3.html', 'image4.html', 'image5.html'] + +XPath syntax has a few advantages: it is a standard XPath feature, and +``@attributes`` can be used in other parts of an XPath expression - e.g. +it is possible to filter by attribute value. + +Scrapy also provides an extension to CSS selectors (``::attr(...)``) +which allows to get attribute values:: + + >>> response.css('a::attr(href)').getall() + ['image1.html', 'image2.html', 'image3.html', 'image4.html', 'image5.html'] + +In addition to that, there is a ``.attrib`` property of Selector. +You can use it if you prefer to lookup attributes in Python +code, without using XPaths or CSS extensions:: + + >>> [a.attrib['href'] for a in response.css('a')] + ['image1.html', 'image2.html', 'image3.html', 'image4.html', 'image5.html'] + +This property is also available on SelectorList; it returns a dictionary +with attributes of a first matching element. It is convenient to use when +a selector is expected to give a single result (e.g. when selecting by element +ID, or when selecting an unique element on a page):: + + >>> response.css('base').attrib + {'href': 'http://example.com/'} + >>> response.css('base').attrib['href'] + 'http://example.com/' + +``.attrib`` property of an empty SelectorList is empty:: + + >>> response.css('foo').attrib + {} Using selectors with regular expressions ---------------------------------------- @@ -241,8 +385,9 @@ Here's an example used to extract image names from the :ref:`HTML code 'My image 4', 'My image 5'] -There's an additional helper reciprocating ``.extract_first()`` for ``.re()``, -named ``.re_first()``. Use it to extract just the first matching string:: +There's an additional helper reciprocating ``.get()`` (and its +alias ``.extract_first()``) for ``.re()``, named ``.re_first()``. +Use it to extract just the first matching string:: >>> response.xpath('//a[contains(@href, "image")]/text()').re_first(r'Name:\s*(.*)') 'My image 1' @@ -266,17 +411,17 @@ it actually extracts all ``<p>`` elements from the document, not only those inside ``<div>`` elements:: >>> for p in divs.xpath('//p'): # this is wrong - gets all <p> from the whole document - ... print p.extract() + ... print(p.get()) This is the proper way to do it (note the dot prefixing the ``.//p`` XPath):: >>> for p in divs.xpath('.//p'): # extracts all <p> inside - ... print p.extract() + ... print(p.get()) Another common case would be to extract all direct ``<p>`` children:: >>> for p in divs.xpath('p'): - ... print p.extract() + ... print(p.get()) For more details about relative XPaths see the `Location Paths`_ section in the XPath specification. @@ -298,14 +443,14 @@ Here's an example to match an element based on its "id" attribute value, without hard-coding it (that was shown previously):: >>> # `$val` used in the expression, a `val` argument needs to be passed - >>> response.xpath('//div[@id=$val]/a/text()', val='images').extract_first() - u'Name: My image 1 ' + >>> response.xpath('//div[@id=$val]/a/text()', val='images').get() + 'Name: My image 1 ' Here's another example, to find the "id" attribute of a ``<div>`` tag containing five ``<a>`` children (here we pass the value ``5`` as an integer):: - >>> response.xpath('//div[count(a)=$cnt]/@id', cnt=5).extract_first() - u'images' + >>> response.xpath('//div[count(a)=$cnt]/@id', cnt=5).get() + 'images' All variable references must have a binding value when calling ``.xpath()`` (otherwise you'll get a ``ValueError: XPath error:`` exception). @@ -314,13 +459,12 @@ This is done by passing as many named arguments as necessary. `parsel`_, the library powering Scrapy selectors, has more details and examples on `XPath variables`_. -.. _parsel: https://parsel.readthedocs.io/ .. _XPath variables: https://parsel.readthedocs.io/en/latest/usage.html#variables-in-xpath-expressions Using EXSLT extensions ---------------------- -Being built atop `lxml`_, Scrapy selectors also support some `EXSLT`_ extensions +Being built atop `lxml`_, Scrapy selectors support some `EXSLT`_ extensions and come with these pre-registered namespaces to use in XPath expressions: @@ -340,7 +484,7 @@ The ``test()`` function, for example, can prove quite useful when XPath's Example selecting links in list item with a "class" attribute ending with a digit:: >>> from scrapy import Selector - >>> doc = """ + >>> doc = u""" ... <div> ... <ul> ... <li class="item-0"><a href="link1.html">first item</a></li> @@ -352,10 +496,10 @@ Example selecting links in list item with a "class" attribute ending with a digi ... </div> ... """ >>> sel = Selector(text=doc, type="html") - >>> sel.xpath('//li//@href').extract() - [u'link1.html', u'link2.html', u'link3.html', u'link4.html', u'link5.html'] - >>> sel.xpath('//li[re:test(@class, "item-\d$")]//@href').extract() - [u'link1.html', u'link2.html', u'link4.html', u'link5.html'] + >>> sel.xpath('//li//@href').getall() + ['link1.html', 'link2.html', 'link3.html', 'link4.html', 'link5.html'] + >>> sel.xpath('//li[re:test(@class, "item-\d$")]//@href').getall() + ['link1.html', 'link2.html', 'link4.html', 'link5.html'] >>> .. warning:: C library ``libxslt`` doesn't natively support EXSLT regular @@ -372,7 +516,7 @@ extracting text elements for example. Example extracting microdata (sample content taken from http://schema.org/Product) with groups of itemscopes and corresponding itemprops:: - >>> doc = """ + >>> doc = u""" ... <div itemscope itemtype="http://schema.org/Product"> ... <span itemprop="name">Kenmore White 17" Microwave</span> ... <img src="kenmore-microwave-17in.jpg" alt='Kenmore 17" Microwave' /> @@ -424,12 +568,12 @@ with groups of itemscopes and corresponding itemprops:: ... """ >>> sel = Selector(text=doc, type="html") >>> for scope in sel.xpath('//div[@itemscope]'): - ... print "current scope:", scope.xpath('@itemtype').extract() + ... print("current scope:", scope.xpath('@itemtype').getall()) ... props = scope.xpath(''' ... set:difference(./descendant::*/@itemprop, ... .//*[@itemscope]/*/@itemprop)''') - ... print " properties:", props.extract() - ... print + ... print(" properties: %s" % (props.getall())) + ... print("") current scope: ['http://schema.org/Product'] properties: ['name', 'aggregateRating', 'offers', 'description', 'review', 'review'] @@ -493,27 +637,27 @@ Example:: Converting a *node-set* to string:: - >>> sel.xpath('//a//text()').extract() # take a peek at the node-set - [u'Click here to go to the ', u'Next Page'] - >>> sel.xpath("string(//a[1]//text())").extract() # convert it to string - [u'Click here to go to the '] + >>> sel.xpath('//a//text()').getall() # take a peek at the node-set + ['Click here to go to the ', 'Next Page'] + >>> sel.xpath("string(//a[1]//text())").getall() # convert it to string + ['Click here to go to the '] A *node* converted to a string, however, puts together the text of itself plus of all its descendants:: - >>> sel.xpath("//a[1]").extract() # select the first node - [u'<a href="#">Click here to go to the <strong>Next Page</strong></a>'] - >>> sel.xpath("string(//a[1])").extract() # convert it to string - [u'Click here to go to the Next Page'] + >>> sel.xpath("//a[1]").getall() # select the first node + ['<a href="#">Click here to go to the <strong>Next Page</strong></a>'] + >>> sel.xpath("string(//a[1])").getall() # convert it to string + ['Click here to go to the Next Page'] So, using the ``.//text()`` node-set won't select anything in this case:: - >>> sel.xpath("//a[contains(.//text(), 'Next Page')]").extract() + >>> sel.xpath("//a[contains(.//text(), 'Next Page')]").getall() [] But using the ``.`` to mean the node, works:: - >>> sel.xpath("//a[contains(., 'Next Page')]").extract() - [u'<a href="#">Click here to go to the <strong>Next Page</strong></a>'] + >>> sel.xpath("//a[contains(., 'Next Page')]").getall() + ['<a href="#">Click here to go to the <strong>Next Page</strong></a>'] .. _`XPath string function`: https://www.w3.org/TR/xpath/#section-String-Functions @@ -538,7 +682,7 @@ Example:: ....: <li>5</li> ....: <li>6</li> ....: </ul>""") - >>> xp = lambda x: sel.xpath(x).extract() + >>> xp = lambda x: sel.xpath(x).getall() This gets all first ``<li>`` elements under whatever it is its parent:: @@ -578,12 +722,59 @@ you can just select by class using CSS and then switch to XPath when needed:: >>> from scrapy import Selector >>> sel = Selector(text='<div class="hero shout"><time datetime="2014-07-23 19:00">Special date</time></div>') - >>> sel.css('.shout').xpath('./time/@datetime').extract() - [u'2014-07-23 19:00'] + >>> sel.css('.shout').xpath('./time/@datetime').getall() + ['2014-07-23 19:00'] This is cleaner than using the verbose XPath trick shown above. Just remember to use the ``.`` in the XPath expressions that will follow. +.. _old-extraction-api: + +extract() and extract_first() +----------------------------- + +If you're a long-time Scrapy user, you're probably familiar +with ``.extract()`` and ``.extract_first()`` selector methods. These methods +are still supported by Scrapy, there are no plans to deprecate them. + +However, Scrapy usage docs are now written using ``.get()`` and +``.getall()`` methods. We feel that these new methods result in a more concise +and readable code. + +The following examples show how these methods map to each other. + +1. ``SelectorList.get()`` is the same as ``SelectorList.extract_first()``:: + + >>> response.css('a::attr(href)').get() + 'image1.html' + >>> response.css('a::attr(href)').extract_first() + 'image1.html' + +2. ``SelectorList.getall()`` is the same as ``SelectorList.extract()``:: + + >>> response.css('a::attr(href)').getall() + ['image1.html', 'image2.html', 'image3.html', 'image4.html', 'image5.html'] + >>> response.css('a::attr(href)').extract() + ['image1.html', 'image2.html', 'image3.html', 'image4.html', 'image5.html'] + +2. ``Selector.get()`` is the same as ``Selector.extract()``:: + + >>> response.css('a::attr(href)')[0].get() + 'image1.html' + >>> response.css('a::attr(href)')[0].extract() + 'image1.html' + +4. For consistency, there is also ``Selector.getall()``, which returns a list:: + + >>> response.css('a::attr(href)')[0].getall() + ['image1.html'] + +So, the main difference is that output of ``.get()`` and ``.getall()`` methods +is more predictable: ``.get()`` always returns a single result, ``.getall()`` +always returns a list of all extracted results. With ``.extract()`` method +it was not always obvious if a result is a list or not; to get a single +result either ``.extract()`` or ``.extract_first()`` should be called. + .. _topics-selectors-ref: @@ -718,10 +909,12 @@ SelectorList objects their results flattened, as a list of unicode strings. +.. _selector-examples-html: + Selector examples on HTML response ---------------------------------- -Here's a couple of :class:`Selector` examples to illustrate several concepts. +Here are some :class:`Selector` examples to illustrate several concepts. In all cases, we assume there is already a :class:`Selector` instantiated with a :class:`~scrapy.http.HtmlResponse` object like this:: @@ -735,20 +928,22 @@ a :class:`~scrapy.http.HtmlResponse` object like this:: 2. Extract the text of all ``<h1>`` elements from an HTML response body, returning a list of unicode strings:: - sel.xpath("//h1").extract() # this includes the h1 tag - sel.xpath("//h1/text()").extract() # this excludes the h1 tag + sel.xpath("//h1").getall() # this includes the h1 tag + sel.xpath("//h1/text()").getall() # this excludes the h1 tag 3. Iterate over all ``<p>`` tags and print their class attribute:: for node in sel.xpath("//p"): - print node.xpath("@class").extract() + print(node.attrib['class']) + + +.. _selector-examples-xml: Selector examples on XML response --------------------------------- -Here's a couple of examples to illustrate several concepts. In both cases we -assume there is already a :class:`Selector` instantiated with an -:class:`~scrapy.http.XmlResponse` object like this:: +Here are some examples to illustrate concepts for :class:`Selector` objects +instantiated with an :class:`~scrapy.http.XmlResponse` object:: sel = Selector(xml_response) @@ -761,7 +956,7 @@ assume there is already a :class:`Selector` instantiated with an a namespace:: sel.register_namespace("g", "http://base.google.com/ns/1.0") - sel.xpath("//g:price").extract() + sel.xpath("//g:price").getall() .. _removing-namespaces: @@ -781,6 +976,20 @@ First, we open the shell with the url we want to scrape:: $ scrapy shell https://github.com/blog.atom +.. highlight:: xml + +This is how the file starts:: + + <?xml version="1.0" encoding="UTF-8"?> + <feed xml:lang="en-US" + xmlns="http://www.w3.org/2005/Atom" + xmlns:media="http://search.yahoo.com/mrss/"> + <id>tag:github.com,2008:/blog</id> + ... + +You can see two namespace declarations: a default "http://www.w3.org/2005/Atom" +and another one using the "media:" prefix for "http://search.yahoo.com/mrss/". + .. highlight:: python Once in the shell we can try selecting all ``<link>`` objects and see that it @@ -794,8 +1003,8 @@ nodes can be accessed directly by their names:: >>> response.selector.remove_namespaces() >>> response.xpath("//link") - [<Selector xpath='//link' data=u'<link xmlns="http://www.w3.org/2005/Atom'>, - <Selector xpath='//link' data=u'<link xmlns="http://www.w3.org/2005/Atom'>, + [<Selector xpath='//link' data='<link xmlns="http://www.w3.org/2005/Atom'>, + <Selector xpath='//link' data='<link xmlns="http://www.w3.org/2005/Atom'>, ... If you wonder why the namespace removal procedure isn't always called by default @@ -803,8 +1012,8 @@ instead of having to call it manually, this is because of two reasons, which, in of relevance, are: 1. Removing namespaces requires to iterate and modify all nodes in the - document, which is a reasonably expensive operation to perform for all - documents crawled by Scrapy + document, which is a reasonably expensive operation to perform by default + for all documents crawled by Scrapy 2. There could be some cases where using namespaces is actually required, in case some element names clash between namespaces. These cases are very rare From 09fd6c2a816ebec175ff3ffd945ce3263c9f1570 Mon Sep 17 00:00:00 2001 From: Mikhail Korobov <kmike84@gmail.com> Date: Wed, 22 Aug 2018 03:59:58 +0500 Subject: [PATCH 148/889] DOC unlink Firefox & Firebug sections from the tutorial for now. See https://github.com/scrapy/scrapy/issues/3373 and https://github.com/scrapy/scrapy/issues/3372 for motivation. --- docs/intro/tutorial.rst | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/docs/intro/tutorial.rst b/docs/intro/tutorial.rst index a24cf0f5b..453f5114f 100644 --- a/docs/intro/tutorial.rst +++ b/docs/intro/tutorial.rst @@ -299,7 +299,8 @@ expressions`:: In order to find the proper CSS selectors to use, you might find useful opening the response page from the shell in your web browser using ``view(response)``. -You can use your browser developer tools (see section about :ref:`topics-developer-tools`). +You can use your browser developer tools to inspect the HTML and come up +with a selector (see section about :ref:`topics-developer-tools`). `Selector Gadget`_ is also a nice tool to quickly find CSS selector for visually selected elements, which works in many browsers. From 2c48d156db7d7846d80fa379dfb33552ac5b5a85 Mon Sep 17 00:00:00 2001 From: Mikhail Korobov <kmike84@gmail.com> Date: Wed, 22 Aug 2018 04:01:17 +0500 Subject: [PATCH 149/889] DOC cleanup references in tutorials: * remove unused link * fix ReST syntax * fix a link to regular expression docs --- docs/intro/tutorial.rst | 3 +-- docs/topics/selectors.rst | 2 +- 2 files changed, 2 insertions(+), 3 deletions(-) diff --git a/docs/intro/tutorial.rst b/docs/intro/tutorial.rst index 453f5114f..92d1065af 100644 --- a/docs/intro/tutorial.rst +++ b/docs/intro/tutorial.rst @@ -288,7 +288,7 @@ to be scraped, you can at least get **some** data. Besides the :meth:`~scrapy.selector.Selector.extract` and :meth:`~scrapy.selector.SelectorList.get` methods, you can also use the :meth:`~scrapy.selector.Selector.re` method to extract using `regular -expressions`:: +expressions`_:: >>> response.css('title::text').re(r'Quotes.*') ['Quotes to Scrape'] @@ -740,4 +740,3 @@ modeling the scraped data. If you prefer to play with an example project, check the :ref:`intro-examples` section. .. _JSON: https://en.wikipedia.org/wiki/JSON -.. _dirbot: https://github.com/scrapy/dirbot diff --git a/docs/topics/selectors.rst b/docs/topics/selectors.rst index 00158ecf1..cf1b0ba22 100644 --- a/docs/topics/selectors.rst +++ b/docs/topics/selectors.rst @@ -251,7 +251,7 @@ that Scrapy (parsel) implements a couple of **non-standard pseudo-elements**: .. warning:: These pseudo-elements are Scrapy-/Parsel-specific. They will most probably not work with other libraries like - `lxml`_ or `PyQuery`_. + `lxml`_ or `PyQuery`_. .. _PyQuery: https://pypi.python.org/pypi/pyquery From 53da56c8dcd6edba12284ed5d125ddd1dcf6f99c Mon Sep 17 00:00:00 2001 From: Mikhail Korobov <kmike84@gmail.com> Date: Wed, 22 Aug 2018 04:17:55 +0500 Subject: [PATCH 150/889] TST update tests to use get/getall/attrib instead of extract --- tests/test_command_shell.py | 2 +- tests/test_http_response.py | 34 +++++++++++----------- tests/test_loader.py | 4 +-- tests/test_pipeline_crawl.py | 2 +- tests/test_selector.py | 24 +++++++-------- tests/test_spider.py | 8 ++--- tests/test_utils_iterators.py | 55 ++++++++++++++++++----------------- 7 files changed, 66 insertions(+), 63 deletions(-) diff --git a/tests/test_command_shell.py b/tests/test_command_shell.py index 3e27d6abd..36baacfbd 100644 --- a/tests/test_command_shell.py +++ b/tests/test_command_shell.py @@ -35,7 +35,7 @@ class ShellTest(ProcessTest, SiteTest, unittest.TestCase): @defer.inlineCallbacks def test_response_selector_html(self): - xpath = 'response.xpath("//p[@class=\'one\']/text()").extract()[0]' + xpath = 'response.xpath("//p[@class=\'one\']/text()").get()' _, out, _ = yield self.execute([self.url('/html'), '-c', xpath]) self.assertEqual(out.strip(), b'Works') diff --git a/tests/test_http_response.py b/tests/test_http_response.py index 820758dc9..3b90e3dac 100644 --- a/tests/test_http_response.py +++ b/tests/test_http_response.py @@ -336,11 +336,11 @@ class TextResponseTest(BaseResponseTest): self.assertIs(response.selector.response, response) self.assertEqual( - response.selector.xpath("//title/text()").extract(), + response.selector.xpath("//title/text()").getall(), [u'Some page'] ) self.assertEqual( - response.selector.css("title::text").extract(), + response.selector.css("title::text").getall(), [u'Some page'] ) self.assertEqual( @@ -353,12 +353,12 @@ class TextResponseTest(BaseResponseTest): response = self.response_class("http://www.example.com", body=body) self.assertEqual( - response.xpath("//title/text()").extract(), - response.selector.xpath("//title/text()").extract(), + response.xpath("//title/text()").getall(), + response.selector.xpath("//title/text()").getall(), ) self.assertEqual( - response.css("title::text").extract(), - response.selector.css("title::text").extract(), + response.css("title::text").getall(), + response.selector.css("title::text").getall(), ) def test_selector_shortcuts_kwargs(self): @@ -366,13 +366,13 @@ class TextResponseTest(BaseResponseTest): response = self.response_class("http://www.example.com", body=body) self.assertEqual( - response.xpath("normalize-space(//p[@class=$pclass])", pclass="content").extract(), - response.xpath("normalize-space(//p[@class=\"content\"])").extract(), + response.xpath("normalize-space(//p[@class=$pclass])", pclass="content").getall(), + response.xpath("normalize-space(//p[@class=\"content\"])").getall(), ) self.assertEqual( response.xpath("//title[count(following::p[@class=$pclass])=$pcount]/text()", - pclass="content", pcount=1).extract(), - response.xpath("//title[count(following::p[@class=\"content\"])=1]/text()").extract(), + pclass="content", pcount=1).getall(), + response.xpath("//title[count(following::p[@class=\"content\"])=1]/text()").getall(), ) def test_urljoin_with_base_url(self): @@ -562,7 +562,7 @@ class XmlResponseTest(TextResponseTest): self.assertIs(response.selector.response, response) self.assertEqual( - response.selector.xpath("//elem/text()").extract(), + response.selector.xpath("//elem/text()").getall(), [u'value'] ) @@ -571,8 +571,8 @@ class XmlResponseTest(TextResponseTest): response = self.response_class("http://www.example.com", body=body) self.assertEqual( - response.xpath("//elem/text()").extract(), - response.selector.xpath("//elem/text()").extract(), + response.xpath("//elem/text()").getall(), + response.selector.xpath("//elem/text()").getall(), ) def test_selector_shortcuts_kwargs(self): @@ -583,12 +583,12 @@ class XmlResponseTest(TextResponseTest): response = self.response_class("http://www.example.com", body=body) self.assertEqual( - response.xpath("//s:elem/text()", namespaces={'s': 'http://scrapy.org'}).extract(), - response.selector.xpath("//s:elem/text()", namespaces={'s': 'http://scrapy.org'}).extract(), + response.xpath("//s:elem/text()", namespaces={'s': 'http://scrapy.org'}).getall(), + response.selector.xpath("//s:elem/text()", namespaces={'s': 'http://scrapy.org'}).getall(), ) response.selector.register_namespace('s2', 'http://scrapy.org') self.assertEqual( - response.xpath("//s1:elem/text()", namespaces={'s1': 'http://scrapy.org'}).extract(), - response.selector.xpath("//s2:elem/text()").extract(), + response.xpath("//s1:elem/text()", namespaces={'s1': 'http://scrapy.org'}).getall(), + response.selector.xpath("//s2:elem/text()").getall(), ) diff --git a/tests/test_loader.py b/tests/test_loader.py index 3b5714058..8b58e4dbd 100644 --- a/tests/test_loader.py +++ b/tests/test_loader.py @@ -634,7 +634,7 @@ class SubselectorLoaderTest(unittest.TestCase): nl = l.nested_xpath("//header") nl.add_xpath('name', 'div/text()') nl.add_css('name_div', '#id') - nl.add_value('name_value', nl.selector.xpath('div[@id = "id"]/text()').extract()) + nl.add_value('name_value', nl.selector.xpath('div[@id = "id"]/text()').getall()) self.assertEqual(l.get_output_value('name'), [u'marta']) self.assertEqual(l.get_output_value('name_div'), [u'<div id="id">marta</div>']) @@ -649,7 +649,7 @@ class SubselectorLoaderTest(unittest.TestCase): nl = l.nested_css("header") nl.add_xpath('name', 'div/text()') nl.add_css('name_div', '#id') - nl.add_value('name_value', nl.selector.xpath('div[@id = "id"]/text()').extract()) + nl.add_value('name_value', nl.selector.xpath('div[@id = "id"]/text()').getall()) self.assertEqual(l.get_output_value('name'), [u'marta']) self.assertEqual(l.get_output_value('name_div'), [u'<div id="id">marta</div>']) diff --git a/tests/test_pipeline_crawl.py b/tests/test_pipeline_crawl.py index 5985a6f3e..fb72c9d6d 100644 --- a/tests/test_pipeline_crawl.py +++ b/tests/test_pipeline_crawl.py @@ -29,7 +29,7 @@ class MediaDownloadSpider(SimpleSpider): for href in response.xpath(''' //table[thead/tr/th="Filename"] /tbody//a/@href - ''').extract()], + ''').getall()], } yield item diff --git a/tests/test_selector.py b/tests/test_selector.py index 526660cc8..bc4baf7ea 100644 --- a/tests/test_selector.py +++ b/tests/test_selector.py @@ -20,17 +20,17 @@ class SelectorTestCase(unittest.TestCase): for x in xl: assert isinstance(x, Selector) - self.assertEqual(sel.xpath('//input').extract(), - [x.extract() for x in sel.xpath('//input')]) + self.assertEqual(sel.xpath('//input').getall(), + [x.get() for x in sel.xpath('//input')]) - self.assertEqual([x.extract() for x in sel.xpath("//input[@name='a']/@name")], + self.assertEqual([x.get() for x in sel.xpath("//input[@name='a']/@name")], [u'a']) - self.assertEqual([x.extract() for x in sel.xpath("number(concat(//input[@name='a']/@value, //input[@name='b']/@value))")], + self.assertEqual([x.get() for x in sel.xpath("number(concat(//input[@name='a']/@value, //input[@name='b']/@value))")], [u'12.0']) - self.assertEqual(sel.xpath("concat('xpath', 'rules')").extract(), + self.assertEqual(sel.xpath("concat('xpath', 'rules')").getall(), [u'xpathrules']) - self.assertEqual([x.extract() for x in sel.xpath("concat(//input[@name='a']/@value, //input[@name='b']/@value)")], + self.assertEqual([x.get() for x in sel.xpath("concat(//input[@name='a']/@value, //input[@name='b']/@value)")], [u'12']) def test_root_base_url(self): @@ -60,12 +60,12 @@ class SelectorTestCase(unittest.TestCase): text = b'<div><img src="a.jpg"><p>Hello</div>' sel = Selector(XmlResponse('http://example.com', body=text, encoding='utf-8')) self.assertEqual(sel.type, 'xml') - self.assertEqual(sel.xpath("//div").extract(), + self.assertEqual(sel.xpath("//div").getall(), [u'<div><img src="a.jpg"><p>Hello</p></img></div>']) sel = Selector(HtmlResponse('http://example.com', body=text, encoding='utf-8')) self.assertEqual(sel.type, 'html') - self.assertEqual(sel.xpath("//div").extract(), + self.assertEqual(sel.xpath("//div").getall(), [u'<div><img src="a.jpg"><p>Hello</p></div>']) def test_http_header_encoding_precedence(self): @@ -84,15 +84,15 @@ class SelectorTestCase(unittest.TestCase): headers = {'Content-Type': ['text/html; charset=utf-8']} response = HtmlResponse(url="http://example.com", headers=headers, body=html_utf8) x = Selector(response) - self.assertEqual(x.xpath("//span[@id='blank']/text()").extract(), + self.assertEqual(x.xpath("//span[@id='blank']/text()").getall(), [u'\xa3']) def test_badly_encoded_body(self): # \xe9 alone isn't valid utf8 sequence - r1 = TextResponse('http://www.example.com', \ - body=b'<html><p>an Jos\xe9 de</p><html>', \ + r1 = TextResponse('http://www.example.com', + body=b'<html><p>an Jos\xe9 de</p><html>', encoding='utf-8') - Selector(r1).xpath('//text()').extract() + Selector(r1).xpath('//text()').getall() def test_weakref_slots(self): """Check that classes are using slots and are weak-referenceable""" diff --git a/tests/test_spider.py b/tests/test_spider.py index 929e0fea8..f26da2334 100644 --- a/tests/test_spider.py +++ b/tests/test_spider.py @@ -147,10 +147,10 @@ class XMLFeedSpiderTest(SpiderTest): def parse_node(self, response, selector): yield { - 'loc': selector.xpath('a:loc/text()').extract(), - 'updated': selector.xpath('b:updated/text()').extract(), - 'other': selector.xpath('other/@value').extract(), - 'custom': selector.xpath('other/@b:custom').extract(), + 'loc': selector.xpath('a:loc/text()').getall(), + 'updated': selector.xpath('b:updated/text()').getall(), + 'other': selector.xpath('other/@value').getall(), + 'custom': selector.xpath('other/@b:custom').getall(), } for iterator in ('iternodes', 'xml'): diff --git a/tests/test_utils_iterators.py b/tests/test_utils_iterators.py index f953076b8..00eb78068 100644 --- a/tests/test_utils_iterators.py +++ b/tests/test_utils_iterators.py @@ -30,10 +30,13 @@ class XmliterTestCase(unittest.TestCase): response = XmlResponse(url="http://example.com", body=body) attrs = [] for x in self.xmliter(response, 'product'): - attrs.append((x.xpath("@id").extract(), x.xpath("name/text()").extract(), x.xpath("./type/text()").extract())) + attrs.append(( + x.attrib['id'], + x.xpath("name/text()").extract(), + x.xpath("./type/text()").extract())) self.assertEqual(attrs, - [(['001'], ['Name 1'], ['Type 1']), (['002'], ['Name 2'], ['Type 2'])]) + [('001', ['Name 1'], ['Type 1']), ('002', ['Name 2'], ['Type 2'])]) def test_xmliter_unusual_node(self): body = b"""<?xml version="1.0" encoding="UTF-8"?> @@ -43,7 +46,7 @@ class XmliterTestCase(unittest.TestCase): </root> """ response = XmlResponse(url="http://example.com", body=body) - nodenames = [e.xpath('name()').extract() + nodenames = [e.xpath('name()').getall() for e in self.xmliter(response, 'matchme...')] self.assertEqual(nodenames, [['matchme...']]) @@ -93,19 +96,19 @@ class XmliterTestCase(unittest.TestCase): attrs = [] for x in self.xmliter(r, u'þingflokkur'): - attrs.append((x.xpath('@id').extract(), - x.xpath(u'./skammstafanir/stuttskammstöfun/text()').extract(), - x.xpath(u'./tímabil/fyrstaþing/text()').extract())) + attrs.append((x.attrib['id'], + x.xpath(u'./skammstafanir/stuttskammstöfun/text()').getall(), + x.xpath(u'./tímabil/fyrstaþing/text()').getall())) self.assertEqual(attrs, - [([u'26'], [u'-'], [u'80']), - ([u'21'], [u'Ab'], [u'76']), - ([u'27'], [u'A'], [u'27'])]) + [(u'26', [u'-'], [u'80']), + (u'21', [u'Ab'], [u'76']), + (u'27', [u'A'], [u'27'])]) def test_xmliter_text(self): body = u"""<?xml version="1.0" encoding="UTF-8"?><products><product>one</product><product>two</product></products>""" - self.assertEqual([x.xpath("text()").extract() for x in self.xmliter(body, 'product')], + self.assertEqual([x.xpath("text()").getall() for x in self.xmliter(body, 'product')], [[u'one'], [u'two']]) def test_xmliter_namespaces(self): @@ -132,15 +135,15 @@ class XmliterTestCase(unittest.TestCase): node = next(my_iter) node.register_namespace('g', 'http://base.google.com/ns/1.0') - self.assertEqual(node.xpath('title/text()').extract(), ['Item 1']) - self.assertEqual(node.xpath('description/text()').extract(), ['This is item 1']) - self.assertEqual(node.xpath('link/text()').extract(), ['http://www.mydummycompany.com/items/1']) - self.assertEqual(node.xpath('g:image_link/text()').extract(), ['http://www.mydummycompany.com/images/item1.jpg']) - self.assertEqual(node.xpath('g:id/text()').extract(), ['ITEM_1']) - self.assertEqual(node.xpath('g:price/text()').extract(), ['400']) - self.assertEqual(node.xpath('image_link/text()').extract(), []) - self.assertEqual(node.xpath('id/text()').extract(), []) - self.assertEqual(node.xpath('price/text()').extract(), []) + self.assertEqual(node.xpath('title/text()').getall(), ['Item 1']) + self.assertEqual(node.xpath('description/text()').getall(), ['This is item 1']) + self.assertEqual(node.xpath('link/text()').getall(), ['http://www.mydummycompany.com/items/1']) + self.assertEqual(node.xpath('g:image_link/text()').getall(), ['http://www.mydummycompany.com/images/item1.jpg']) + self.assertEqual(node.xpath('g:id/text()').getall(), ['ITEM_1']) + self.assertEqual(node.xpath('g:price/text()').getall(), ['400']) + self.assertEqual(node.xpath('image_link/text()').getall(), []) + self.assertEqual(node.xpath('id/text()').getall(), []) + self.assertEqual(node.xpath('price/text()').getall(), []) def test_xmliter_exception(self): body = u"""<?xml version="1.0" encoding="UTF-8"?><products><product>one</product><product>two</product></products>""" @@ -159,7 +162,7 @@ class XmliterTestCase(unittest.TestCase): body = b'<?xml version="1.0" encoding="ISO-8859-9"?>\n<xml>\n <item>Some Turkish Characters \xd6\xc7\xde\xdd\xd0\xdc \xfc\xf0\xfd\xfe\xe7\xf6</item>\n</xml>\n\n' response = XmlResponse('http://www.example.com', body=body) self.assertEqual( - next(self.xmliter(response, 'item')).extract(), + next(self.xmliter(response, 'item')).get(), u'<item>Some Turkish Characters \xd6\xc7\u015e\u0130\u011e\xdc \xfc\u011f\u0131\u015f\xe7\xf6</item>' ) @@ -192,9 +195,9 @@ class LxmlXmliterTestCase(XmliterTestCase): namespace_iter = self.xmliter(response, 'image_link', 'http://base.google.com/ns/1.0') node = next(namespace_iter) - self.assertEqual(node.xpath('text()').extract(), ['http://www.mydummycompany.com/images/item1.jpg']) + self.assertEqual(node.xpath('text()').getall(), ['http://www.mydummycompany.com/images/item1.jpg']) node = next(namespace_iter) - self.assertEqual(node.xpath('text()').extract(), ['http://www.mydummycompany.com/images/item2.jpg']) + self.assertEqual(node.xpath('text()').getall(), ['http://www.mydummycompany.com/images/item2.jpg']) def test_xmliter_namespaces_prefix(self): body = b"""\ @@ -219,14 +222,14 @@ class LxmlXmliterTestCase(XmliterTestCase): my_iter = self.xmliter(response, 'table', 'http://www.w3.org/TR/html4/', 'h') node = next(my_iter) - self.assertEqual(len(node.xpath('h:tr/h:td').extract()), 2) - self.assertEqual(node.xpath('h:tr/h:td[1]/text()').extract(), ['Apples']) - self.assertEqual(node.xpath('h:tr/h:td[2]/text()').extract(), ['Bananas']) + self.assertEqual(len(node.xpath('h:tr/h:td').getall()), 2) + self.assertEqual(node.xpath('h:tr/h:td[1]/text()').getall(), ['Apples']) + self.assertEqual(node.xpath('h:tr/h:td[2]/text()').getall(), ['Bananas']) my_iter = self.xmliter(response, 'table', 'http://www.w3schools.com/furniture', 'f') node = next(my_iter) - self.assertEqual(node.xpath('f:name/text()').extract(), ['African Coffee Table']) + self.assertEqual(node.xpath('f:name/text()').getall(), ['African Coffee Table']) def test_xmliter_objtype_exception(self): i = self.xmliter(42, 'product') From 8c29be606c1be71059b454e41b87354e22569423 Mon Sep 17 00:00:00 2001 From: Mikhail Korobov <kmike84@gmail.com> Date: Wed, 22 Aug 2018 04:18:29 +0500 Subject: [PATCH 151/889] update spider templates to use .get --- scrapy/templates/spiders/crawl.tmpl | 10 +++++----- scrapy/templates/spiders/xmlfeed.tmpl | 10 +++++----- 2 files changed, 10 insertions(+), 10 deletions(-) diff --git a/scrapy/templates/spiders/crawl.tmpl b/scrapy/templates/spiders/crawl.tmpl index 802cb88a1..878425125 100644 --- a/scrapy/templates/spiders/crawl.tmpl +++ b/scrapy/templates/spiders/crawl.tmpl @@ -14,8 +14,8 @@ class $classname(CrawlSpider): ) def parse_item(self, response): - i = {} - #i['domain_id'] = response.xpath('//input[@id="sid"]/@value').extract() - #i['name'] = response.xpath('//div[@id="name"]').extract() - #i['description'] = response.xpath('//div[@id="description"]').extract() - return i + item = {} + #item['domain_id'] = response.xpath('//input[@id="sid"]/@value').get() + #item['name'] = response.xpath('//div[@id="name"]').get() + #item['description'] = response.xpath('//div[@id="description"]').get() + return item diff --git a/scrapy/templates/spiders/xmlfeed.tmpl b/scrapy/templates/spiders/xmlfeed.tmpl index 7c2ff8850..863c9772f 100644 --- a/scrapy/templates/spiders/xmlfeed.tmpl +++ b/scrapy/templates/spiders/xmlfeed.tmpl @@ -10,8 +10,8 @@ class $classname(XMLFeedSpider): itertag = 'item' # change it accordingly def parse_node(self, response, selector): - i = {} - #i['url'] = selector.select('url').extract() - #i['name'] = selector.select('name').extract() - #i['description'] = selector.select('description').extract() - return i + item = {} + #item['url'] = selector.select('url').get() + #item['name'] = selector.select('name').get() + #item['description'] = selector.select('description').get() + return item From 460f0f045141f73dcc6d7a2309b7e2f0c2a492b4 Mon Sep 17 00:00:00 2001 From: Mikhail Korobov <kmike84@gmail.com> Date: Wed, 22 Aug 2018 04:20:32 +0500 Subject: [PATCH 152/889] [backwards incompatible] switch ItemLoader from .extract to .getall. This change is backwards incompatible if ItemLoader is used with a custom Selector subclass which overrides .extract without overriding .getall. --- scrapy/loader/__init__.py | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/scrapy/loader/__init__.py b/scrapy/loader/__init__.py index e73413318..a7c75a46a 100644 --- a/scrapy/loader/__init__.py +++ b/scrapy/loader/__init__.py @@ -181,7 +181,7 @@ class ItemLoader(object): def _get_xpathvalues(self, xpaths, **kw): self._check_selector_method() xpaths = arg_to_iter(xpaths) - return flatten(self.selector.xpath(xpath).extract() for xpath in xpaths) + return flatten(self.selector.xpath(xpath).getall() for xpath in xpaths) def add_css(self, field_name, css, *processors, **kw): values = self._get_cssvalues(css, **kw) @@ -198,6 +198,6 @@ class ItemLoader(object): def _get_cssvalues(self, csss, **kw): self._check_selector_method() csss = arg_to_iter(csss) - return flatten(self.selector.css(css).extract() for css in csss) + return flatten(self.selector.css(css).getall() for css in csss) XPathItemLoader = create_deprecated_class('XPathItemLoader', ItemLoader) From 12e42bbe06bea5a0f86e95630b184e86b41c95c7 Mon Sep 17 00:00:00 2001 From: Mikhail Korobov <kmike84@gmail.com> Date: Wed, 22 Aug 2018 04:20:55 +0500 Subject: [PATCH 153/889] switch SgmlLinkExtractor to .getall --- scrapy/linkextractors/sgml.py | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/scrapy/linkextractors/sgml.py b/scrapy/linkextractors/sgml.py index f4ca4262a..5fa6b771c 100644 --- a/scrapy/linkextractors/sgml.py +++ b/scrapy/linkextractors/sgml.py @@ -141,7 +141,7 @@ class SgmlLinkExtractor(FilteringLinkExtractor): base_url = get_base_url(response) body = u''.join(f for x in self.restrict_xpaths - for f in response.xpath(x).extract() + for f in response.xpath(x).getall() ).encode(response.encoding, errors='xmlcharrefreplace') else: body = response.body From afce9716fabff6169dc9cc146a2589ebf4c1ed13 Mon Sep 17 00:00:00 2001 From: Mikhail Korobov <kmike84@gmail.com> Date: Wed, 22 Aug 2018 04:25:43 +0500 Subject: [PATCH 154/889] DOC mention .attrib in the tutorial --- docs/intro/tutorial.rst | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/docs/intro/tutorial.rst b/docs/intro/tutorial.rst index 92d1065af..07fb4807f 100644 --- a/docs/intro/tutorial.rst +++ b/docs/intro/tutorial.rst @@ -520,6 +520,12 @@ like this:: >>> response.css('li.next a::attr(href)').get() '/page/2/' +There is also an ``attrib`` property available +(see :ref:`selecting-attributes` for more):: + + >>> response.css('li.next a').attrib['href'] + '/page/2' + Let's see now our spider modified to recursively follow the link to the next page, extracting data from it:: From bdcc045f62a34d1655a4ead4e0b38d6fe97a08fc Mon Sep 17 00:00:00 2001 From: Mikhail Korobov <kmike84@gmail.com> Date: Wed, 22 Aug 2018 04:27:21 +0500 Subject: [PATCH 155/889] DOC switch from .extract to get/getall API in docs Also, response.urljoin is added in a few places, for robustness. --- docs/intro/tutorial.rst | 22 +++++++++++----------- docs/topics/shell.rst | 4 ++-- docs/topics/spiders.rst | 14 +++++++------- 3 files changed, 20 insertions(+), 20 deletions(-) diff --git a/docs/intro/tutorial.rst b/docs/intro/tutorial.rst index 07fb4807f..46e84b21c 100644 --- a/docs/intro/tutorial.rst +++ b/docs/intro/tutorial.rst @@ -254,7 +254,7 @@ data. To extract the text from the title above, you can do:: - >>> response.css('title::text').extract() + >>> response.css('title::text').getall() ['Quotes to Scrape'] There are two things to note here: one is that we've added ``::text`` to the @@ -262,12 +262,12 @@ CSS query, to mean we want to select only the text elements directly inside ``<title>`` element. If we don't specify ``::text``, we'd get the full title element, including its tags:: - >>> response.css('title').extract() + >>> response.css('title').getall() ['<title>Quotes to Scrape'] -The other thing is that the result of calling ``.extract()`` is a list, because -we're dealing with an instance of :class:`~scrapy.selector.SelectorList`. When -you know you just want the first result, as in this case, you can do:: +The other thing is that the result of calling ``.getall()`` is a list: it is +possible that a selector returns more than one result, so we extract them all. +When you know you just want the first result, as in this case, you can do:: >>> response.css('title::text').get() 'Quotes to Scrape' @@ -392,10 +392,10 @@ using the ``quote`` object we just created:: >>> author 'Albert Einstein' -Given that the tags are a list of strings, we can use the ``.extract()`` method +Given that the tags are a list of strings, we can use the ``.getall()`` method to get all of them:: - >>> tags = quote.css("div.tags a.tag::text").extract() + >>> tags = quote.css("div.tags a.tag::text").getall() >>> tags ['change', 'deep-thoughts', 'thinking', 'world'] @@ -405,7 +405,7 @@ quotes elements and put them together into a Python dictionary:: >>> for quote in response.css("div.quote"): ... text = quote.css("span.text::text").get() ... author = quote.css("small.author::text").get() - ... tags = quote.css("div.tags a.tag::text").extract() + ... tags = quote.css("div.tags a.tag::text").getall() ... print(dict(text=text, author=author, tags=tags)) {'tags': ['change', 'deep-thoughts', 'thinking', 'world'], 'author': 'Albert Einstein', 'text': '“The world as we have created it is a process of our thinking. It cannot be changed without changing our thinking.”'} {'tags': ['abilities', 'choices'], 'author': 'J.K. Rowling', 'text': '“It is our choices, Harry, that show what we truly are, far more than our abilities.”'} @@ -438,7 +438,7 @@ in the callback, as you can see below:: yield { 'text': quote.css('span.text::text').get(), 'author': quote.css('small.author::text').get(), - 'tags': quote.css('div.tags a.tag::text').extract(), + 'tags': quote.css('div.tags a.tag::text').getall(), } If you run this spider, it will output the extracted data with the log:: @@ -543,7 +543,7 @@ page, extracting data from it:: yield { 'text': quote.css('span.text::text').get(), 'author': quote.css('small.author::text').get(), - 'tags': quote.css('div.tags a.tag::text').extract(), + 'tags': quote.css('div.tags a.tag::text').getall(), } next_page = response.css('li.next a::attr(href)').get() @@ -594,7 +594,7 @@ As a shortcut for creating Request objects you can use yield { 'text': quote.css('span.text::text').get(), 'author': quote.css('span small::text').get(), - 'tags': quote.css('div.tags a.tag::text').extract(), + 'tags': quote.css('div.tags a.tag::text').getall(), } next_page = response.css('li.next a::attr(href)').get() diff --git a/docs/topics/shell.rst b/docs/topics/shell.rst index 9de6abef7..68a0b19b5 100644 --- a/docs/topics/shell.rst +++ b/docs/topics/shell.rst @@ -184,8 +184,8 @@ After that, we can start playing with the objects:: >>> fetch("https://reddit.com") - >>> response.xpath('//title/text()').extract() - ['reddit: the front page of the internet'] + >>> response.xpath('//title/text()').get() + 'reddit: the front page of the internet' >>> request = request.replace(method="POST") diff --git a/docs/topics/spiders.rst b/docs/topics/spiders.rst index 4505b7315..a08dc30f2 100644 --- a/docs/topics/spiders.rst +++ b/docs/topics/spiders.rst @@ -229,11 +229,11 @@ Return multiple Requests and items from a single callback:: ] def parse(self, response): - for h3 in response.xpath('//h3').extract(): + for h3 in response.xpath('//h3').getall(): yield {"title": h3} - for url in response.xpath('//a/@href').extract(): - yield scrapy.Request(url, callback=self.parse) + for href in response.xpath('//a/@href').getall(): + yield scrapy.Request(response.urljoin(href), self.parse) Instead of :attr:`~.start_urls` you can use :meth:`~.start_requests` directly; to give data more structure you can use :ref:`topics-items`:: @@ -251,11 +251,11 @@ to give data more structure you can use :ref:`topics-items`:: yield scrapy.Request('http://www.example.com/3.html', self.parse) def parse(self, response): - for h3 in response.xpath('//h3').extract(): + for h3 in response.xpath('//h3').getall(): yield MyItem(title=h3) - for url in response.xpath('//a/@href').extract(): - yield scrapy.Request(url, callback=self.parse) + for href in response.xpath('//a/@href').getall(): + yield scrapy.Request(response.urljoin(href), self.parse) .. _spiderargs: @@ -545,7 +545,7 @@ These spiders are pretty easy to use, let's have a look at one example:: itertag = 'item' def parse_node(self, response, node): - self.logger.info('Hi, this is a <%s> node!: %s', self.itertag, ''.join(node.extract())) + self.logger.info('Hi, this is a <%s> node!: %s', self.itertag, ''.join(node.getall())) item = TestItem() item['id'] = node.xpath('@id').get() From 7fdfdb7fa244ed44274aaa9750efec1c333eedd1 Mon Sep 17 00:00:00 2001 From: Mikhail Korobov Date: Wed, 22 Aug 2018 17:34:44 +0500 Subject: [PATCH 156/889] DOC reorganize selectors tutorial, port more topics from parsel docs, adjust wording in the introduction --- docs/topics/selectors.rst | 514 +++++++++++++++++++++----------------- 1 file changed, 281 insertions(+), 233 deletions(-) diff --git a/docs/topics/selectors.rst b/docs/topics/selectors.rst index cf1b0ba22..2db982b37 100644 --- a/docs/topics/selectors.rst +++ b/docs/topics/selectors.rst @@ -25,17 +25,14 @@ either by `XPath`_ or `CSS`_ expressions. used with HTML. `CSS`_ is a language for applying styles to HTML documents. It defines selectors to associate those styles with specific HTML elements. -Scrapy selectors are powered by `parsel`_ library, which uses `lxml`_ library -under the hood. It means Scrapy selectors are very similar in speed and -parsing accuracy to lxml. +.. note:: + Scrapy Selectors is a thin wrapper around `parsel`_ library; the purpose of + this wrapper is to provide better integration with Scrapy Response objects. -This page explains how selectors work and describes their API which is very -small and simple, unlike the `lxml`_ API which is much bigger because the -`lxml`_ library can be used for many other tasks, besides selecting markup -documents. - -For a complete reference of the selectors API see -:ref:`Selector reference ` + `parsel`_ is a stand-alone web scraping library which can be used without + Scrapy. It uses `lxml`_ library under the hood, and implements an + easy API on top of lxml API. It means Scrapy selectors are very similar + in speed and parsing accuracy to lxml. .. _BeautifulSoup: https://www.crummy.com/software/BeautifulSoup/ .. _lxml: http://lxml.de/ @@ -73,9 +70,8 @@ Constructing from response:: >>> Selector(response=response).xpath('//span/text()').get() 'good' -For convenience, response objects expose a selector on `.selector` attribute, -it's totally OK to use this shortcut when possible. By using it you can -ensure the response body is parsed only once:: +For convenience, response objects expose a selector on `.selector` attribute. +By using it you can ensure the response body is parsed only once:: >>> response.selector.xpath('//span/text()').get() 'good' @@ -88,8 +84,10 @@ more shortcuts: ``response.xpath()`` and ``response.css()``:: >>> response.css('span::text').get() 'good' -Usually there is no need to construct Scrapy selectors manually because of -these shortcuts. +Usually there is no need to construct Scrapy selectors manually: +``response`` object is available in Spider callbacks, so in most cases +it is more convenient to use ``response.css()`` and ``response.xpath()`` +shortcuts. Using selectors --------------- @@ -392,6 +390,71 @@ Use it to extract just the first matching string:: >>> response.xpath('//a[contains(@href, "image")]/text()').re_first(r'Name:\s*(.*)') 'My image 1' +.. _old-extraction-api: + +extract() and extract_first() +----------------------------- + +If you're a long-time Scrapy user, you're probably familiar +with ``.extract()`` and ``.extract_first()`` selector methods. Many blog posts +and tutorials are using them as well. These methods are still supported +by Scrapy, there are **no plans** to deprecate them. + +However, Scrapy usage docs are now written using ``.get()`` and +``.getall()`` methods. We feel that these new methods result in a more concise +and readable code. + +The following examples show how these methods map to each other. + +1. ``SelectorList.get()`` is the same as ``SelectorList.extract_first()``:: + + >>> response.css('a::attr(href)').get() + 'image1.html' + >>> response.css('a::attr(href)').extract_first() + 'image1.html' + +2. ``SelectorList.getall()`` is the same as ``SelectorList.extract()``:: + + >>> response.css('a::attr(href)').getall() + ['image1.html', 'image2.html', 'image3.html', 'image4.html', 'image5.html'] + >>> response.css('a::attr(href)').extract() + ['image1.html', 'image2.html', 'image3.html', 'image4.html', 'image5.html'] + +2. ``Selector.get()`` is the same as ``Selector.extract()``:: + + >>> response.css('a::attr(href)')[0].get() + 'image1.html' + >>> response.css('a::attr(href)')[0].extract() + 'image1.html' + +4. For consistency, there is also ``Selector.getall()``, which returns a list:: + + >>> response.css('a::attr(href)')[0].getall() + ['image1.html'] + +So, the main difference is that output of ``.get()`` and ``.getall()`` methods +is more predictable: ``.get()`` always returns a single result, ``.getall()`` +always returns a list of all extracted results. With ``.extract()`` method +it was not always obvious if a result is a list or not; to get a single +result either ``.extract()`` or ``.extract_first()`` should be called. + + +.. _topics-selectors-xpaths: + +Working with XPaths +=================== + +Here are some tips which may help you to use XPath with Scrapy selectors +effectively. If you are not much familiar with XPath yet, +you may want to take a look first at this `XPath tutorial`_. + +.. note:: + Some of the tips are based on `this post from ScrapingHub's blog`_. + +.. _`XPath tutorial`: http://www.zvon.org/comp/r/tut-XPath_1.html +.. _`this post from ScrapingHub's blog`: https://blog.scrapinghub.com/2014/07/17/xpath-tips-from-the-web-scraping-trenches/ + + .. _topics-selectors-relative-xpaths: Working with relative XPaths @@ -428,6 +491,114 @@ XPath specification. .. _Location Paths: https://www.w3.org/TR/xpath#location-paths +When querying by class, consider using CSS +------------------------------------------ + +Because an element can contain multiple CSS classes, the XPath way to select elements +by class is the rather verbose:: + + *[contains(concat(' ', normalize-space(@class), ' '), ' someclass ')] + +If you use ``@class='someclass'`` you may end up missing elements that have +other classes, and if you just use ``contains(@class, 'someclass')`` to make up +for that you may end up with more elements that you want, if they have a different +class name that shares the string ``someclass``. + +As it turns out, Scrapy selectors allow you to chain selectors, so most of the time +you can just select by class using CSS and then switch to XPath when needed:: + + >>> from scrapy import Selector + >>> sel = Selector(text='
        ') + >>> sel.css('.shout').xpath('./time/@datetime').getall() + ['2014-07-23 19:00'] + +This is cleaner than using the verbose XPath trick shown above. Just remember +to use the ``.`` in the XPath expressions that will follow. + +Beware of the difference between //node[1] and (//node)[1] +---------------------------------------------------------- + +``//node[1]`` selects all the nodes occurring first under their respective parents. + +``(//node)[1]`` selects all the nodes in the document, and then gets only the first of them. + +Example:: + + >>> from scrapy import Selector + >>> sel = Selector(text=""" + ....:
          + ....:
        • 1
          • + ....:
        • 2
          • + ....:
        • 3
          • + ....:
        + ....:
          + ....:
        • 4
          • + ....:
        • 5
          • + ....:
        • 6
          • + ....:
        """) + >>> xp = lambda x: sel.xpath(x).getall() + +This gets all first ``
      • `` elements under whatever it is its parent:: + + >>> xp("//li[1]") + ['
      • 1
        • ', '
      • 4
        • '] + +And this gets the first ``
      • `` element in the whole document:: + + >>> xp("(//li)[1]") + ['
      • 1
        • '] + +This gets all first ``
      • `` elements under an ``
          `` parent:: + + >>> xp("//ul/li[1]") + ['
        • 1
          • ', '
        • 4
          • '] + +And this gets the first ``
        • `` element under an ``
            `` parent in the whole document:: + + >>> xp("(//ul/li)[1]") + ['
          • 1
            • '] + +Using text nodes in a condition +------------------------------- + +When you need to use the text content as argument to an `XPath string function`_, +avoid using ``.//text()`` and use just ``.`` instead. + +This is because the expression ``.//text()`` yields a collection of text elements -- a *node-set*. +And when a node-set is converted to a string, which happens when it is passed as argument to +a string function like ``contains()`` or ``starts-with()``, it results in the text for the first element only. + +Example:: + + >>> from scrapy import Selector + >>> sel = Selector(text='Click here to go to the Next Page') + +Converting a *node-set* to string:: + + >>> sel.xpath('//a//text()').getall() # take a peek at the node-set + ['Click here to go to the ', 'Next Page'] + >>> sel.xpath("string(//a[1]//text())").getall() # convert it to string + ['Click here to go to the '] + +A *node* converted to a string, however, puts together the text of itself plus of all its descendants:: + + >>> sel.xpath("//a[1]").getall() # select the first node + ['Click here to go to the Next Page'] + >>> sel.xpath("string(//a[1])").getall() # convert it to string + ['Click here to go to the Next Page'] + +So, using the ``.//text()`` node-set won't select anything in this case:: + + >>> sel.xpath("//a[contains(.//text(), 'Next Page')]").getall() + [] + +But using the ``.`` to mean the node, works:: + + >>> sel.xpath("//a[contains(., 'Next Page')]").getall() + ['Click here to go to the Next Page'] + +.. _`XPath string function`: https://www.w3.org/TR/xpath/#section-String-Functions + .. _topics-selectors-xpath-variables: Variables in XPath expressions @@ -461,6 +632,69 @@ on `XPath variables`_. .. _XPath variables: https://parsel.readthedocs.io/en/latest/usage.html#variables-in-xpath-expressions + +.. _removing-namespaces: + +Removing namespaces +------------------- + +When dealing with scraping projects, it is often quite convenient to get rid of +namespaces altogether and just work with element names, to write more +simple/convenient XPaths. You can use the +:meth:`Selector.remove_namespaces` method for that. + +Let's show an example that illustrates this with GitHub blog atom feed. + +.. highlight:: sh + +First, we open the shell with the url we want to scrape:: + + $ scrapy shell https://github.com/blog.atom + +.. highlight:: xml + +This is how the file starts:: + + + + tag:github.com,2008:/blog + ... + +You can see two namespace declarations: a default "http://www.w3.org/2005/Atom" +and another one using the "media:" prefix for "http://search.yahoo.com/mrss/". + +.. highlight:: python + +Once in the shell we can try selecting all ```` objects and see that it +doesn't work (because the Atom XML namespace is obfuscating those nodes):: + + >>> response.xpath("//link") + [] + +But once we call the :meth:`Selector.remove_namespaces` method, all +nodes can be accessed directly by their names:: + + >>> response.selector.remove_namespaces() + >>> response.xpath("//link") + [, + , + ... + +If you wonder why the namespace removal procedure isn't always called by default +instead of having to call it manually, this is because of two reasons, which, in order +of relevance, are: + +1. Removing namespaces requires to iterate and modify all nodes in the + document, which is a reasonably expensive operation to perform by default + for all documents crawled by Scrapy + +2. There could be some cases where using namespaces is actually required, in + case some element names clash between namespaces. These cases are very rare + though. + + Using EXSLT extensions ---------------------- @@ -606,174 +840,44 @@ inside another ``itemscope``. .. _regular expressions: http://exslt.org/regexp/index.html .. _set manipulation: http://exslt.org/set/index.html +Other XPath extensions +---------------------- -Some XPath tips ---------------- +Scrapy selectors also provide a sorely missed XPath extension function +``has-class`` that returns ``True`` for nodes that have all of the specified +HTML classes. -Here are some tips that you may find useful when using XPath -with Scrapy selectors, based on `this post from ScrapingHub's blog`_. -If you are not much familiar with XPath yet, -you may want to take a look first at this `XPath tutorial`_. +.. highlight:: html +For the following HTML:: -.. _`XPath tutorial`: http://www.zvon.org/comp/r/tut-XPath_1.html -.. _`this post from ScrapingHub's blog`: https://blog.scrapinghub.com/2014/07/17/xpath-tips-from-the-web-scraping-trenches/ +

            First

            +

            Second

            +

            Third

            +

            Fourth

            +.. highlight:: python -Using text nodes in a condition -~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +You can use it like this:: -When you need to use the text content as argument to an `XPath string function`_, -avoid using ``.//text()`` and use just ``.`` instead. - -This is because the expression ``.//text()`` yields a collection of text elements -- a *node-set*. -And when a node-set is converted to a string, which happens when it is passed as argument to -a string function like ``contains()`` or ``starts-with()``, it results in the text for the first element only. - -Example:: - - >>> from scrapy import Selector - >>> sel = Selector(text='Click here to go to the Next Page') - -Converting a *node-set* to string:: - - >>> sel.xpath('//a//text()').getall() # take a peek at the node-set - ['Click here to go to the ', 'Next Page'] - >>> sel.xpath("string(//a[1]//text())").getall() # convert it to string - ['Click here to go to the '] - -A *node* converted to a string, however, puts together the text of itself plus of all its descendants:: - - >>> sel.xpath("//a[1]").getall() # select the first node - ['Click here to go to the Next Page'] - >>> sel.xpath("string(//a[1])").getall() # convert it to string - ['Click here to go to the Next Page'] - -So, using the ``.//text()`` node-set won't select anything in this case:: - - >>> sel.xpath("//a[contains(.//text(), 'Next Page')]").getall() + >>> response.xpath('//p[has-class("foo")]') + [, + ] + >>> response.xpath('//p[has-class("foo", "bar-baz")]') + [] + >>> response.xpath('//p[has-class("foo", "bar")]') [] -But using the ``.`` to mean the node, works:: +So XPath ``//p[has-class("foo", "bar-baz")]`` is roughly equivalent to CSS +``p.foo.bar-baz``. Please note, that it is slower in most of the cases, +because it's a pure-Python function that's invoked for every node in question +whereas the CSS lookup is translated into XPath and thus runs more efficiently, +so performance-wise its uses are limited to situations that are not easily +described with CSS selectors. - >>> sel.xpath("//a[contains(., 'Next Page')]").getall() - ['Click here to go to the Next Page'] +Parsel also simplifies adding your own XPath extensions. -.. _`XPath string function`: https://www.w3.org/TR/xpath/#section-String-Functions - -Beware of the difference between //node[1] and (//node)[1] -~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ - -``//node[1]`` selects all the nodes occurring first under their respective parents. - -``(//node)[1]`` selects all the nodes in the document, and then gets only the first of them. - -Example:: - - >>> from scrapy import Selector - >>> sel = Selector(text=""" - ....:
              - ....:
            • 1
              • - ....:
            • 2
              • - ....:
            • 3
              • - ....:
            - ....:
              - ....:
            • 4
              • - ....:
            • 5
              • - ....:
            • 6
              • - ....:
            """) - >>> xp = lambda x: sel.xpath(x).getall() - -This gets all first ``
          • `` elements under whatever it is its parent:: - - >>> xp("//li[1]") - ['
          • 1
            • ', '
          • 4
            • '] - -And this gets the first ``
          • `` element in the whole document:: - - >>> xp("(//li)[1]") - ['
          • 1
            • '] - -This gets all first ``
          • `` elements under an ``
              `` parent:: - - >>> xp("//ul/li[1]") - ['
            • 1
              • ', '
            • 4
              • '] - -And this gets the first ``
            • `` element under an ``
                `` parent in the whole document:: - - >>> xp("(//ul/li)[1]") - ['
              • 1
                • '] - -When querying by class, consider using CSS -~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ - -Because an element can contain multiple CSS classes, the XPath way to select elements -by class is the rather verbose:: - - *[contains(concat(' ', normalize-space(@class), ' '), ' someclass ')] - -If you use ``@class='someclass'`` you may end up missing elements that have -other classes, and if you just use ``contains(@class, 'someclass')`` to make up -for that you may end up with more elements that you want, if they have a different -class name that shares the string ``someclass``. - -As it turns out, Scrapy selectors allow you to chain selectors, so most of the time -you can just select by class using CSS and then switch to XPath when needed:: - - >>> from scrapy import Selector - >>> sel = Selector(text='
                ') - >>> sel.css('.shout').xpath('./time/@datetime').getall() - ['2014-07-23 19:00'] - -This is cleaner than using the verbose XPath trick shown above. Just remember -to use the ``.`` in the XPath expressions that will follow. - -.. _old-extraction-api: - -extract() and extract_first() ------------------------------ - -If you're a long-time Scrapy user, you're probably familiar -with ``.extract()`` and ``.extract_first()`` selector methods. These methods -are still supported by Scrapy, there are no plans to deprecate them. - -However, Scrapy usage docs are now written using ``.get()`` and -``.getall()`` methods. We feel that these new methods result in a more concise -and readable code. - -The following examples show how these methods map to each other. - -1. ``SelectorList.get()`` is the same as ``SelectorList.extract_first()``:: - - >>> response.css('a::attr(href)').get() - 'image1.html' - >>> response.css('a::attr(href)').extract_first() - 'image1.html' - -2. ``SelectorList.getall()`` is the same as ``SelectorList.extract()``:: - - >>> response.css('a::attr(href)').getall() - ['image1.html', 'image2.html', 'image3.html', 'image4.html', 'image5.html'] - >>> response.css('a::attr(href)').extract() - ['image1.html', 'image2.html', 'image3.html', 'image4.html', 'image5.html'] - -2. ``Selector.get()`` is the same as ``Selector.extract()``:: - - >>> response.css('a::attr(href)')[0].get() - 'image1.html' - >>> response.css('a::attr(href)')[0].extract() - 'image1.html' - -4. For consistency, there is also ``Selector.getall()``, which returns a list:: - - >>> response.css('a::attr(href)')[0].getall() - ['image1.html'] - -So, the main difference is that output of ``.get()`` and ``.getall()`` methods -is more predictable: ``.get()`` always returns a single result, ``.getall()`` -always returns a list of all extracted results. With ``.extract()`` method -it was not always obvious if a result is a list or not; to get a single -result either ``.extract()`` or ``.extract_first()`` should be called. +.. autofunction:: parsel.xpathfuncs.set_xpathfunc .. _topics-selectors-ref: @@ -909,6 +1013,11 @@ SelectorList objects their results flattened, as a list of unicode strings. +.. _selector-examples: + +Examples +======== + .. _selector-examples-html: Selector examples on HTML response @@ -958,65 +1067,4 @@ instantiated with an :class:`~scrapy.http.XmlResponse` object:: sel.register_namespace("g", "http://base.google.com/ns/1.0") sel.xpath("//g:price").getall() -.. _removing-namespaces: - -Removing namespaces -------------------- - -When dealing with scraping projects, it is often quite convenient to get rid of -namespaces altogether and just work with element names, to write more -simple/convenient XPaths. You can use the -:meth:`Selector.remove_namespaces` method for that. - -Let's show an example that illustrates this with GitHub blog atom feed. - -.. highlight:: sh - -First, we open the shell with the url we want to scrape:: - - $ scrapy shell https://github.com/blog.atom - -.. highlight:: xml - -This is how the file starts:: - - - - tag:github.com,2008:/blog - ... - -You can see two namespace declarations: a default "http://www.w3.org/2005/Atom" -and another one using the "media:" prefix for "http://search.yahoo.com/mrss/". - -.. highlight:: python - -Once in the shell we can try selecting all ```` objects and see that it -doesn't work (because the Atom XML namespace is obfuscating those nodes):: - - >>> response.xpath("//link") - [] - -But once we call the :meth:`Selector.remove_namespaces` method, all -nodes can be accessed directly by their names:: - - >>> response.selector.remove_namespaces() - >>> response.xpath("//link") - [, - , - ... - -If you wonder why the namespace removal procedure isn't always called by default -instead of having to call it manually, this is because of two reasons, which, in order -of relevance, are: - -1. Removing namespaces requires to iterate and modify all nodes in the - document, which is a reasonably expensive operation to perform by default - for all documents crawled by Scrapy - -2. There could be some cases where using namespaces is actually required, in - case some element names clash between namespaces. These cases are very rare - though. - .. _Google Base XML feed: https://support.google.com/merchants/answer/160589?hl=en&ref_topic=2473799 From dc95ecbe25a5921f902fbccc93d50f7682cefda2 Mon Sep 17 00:00:00 2001 From: Mikhail Korobov Date: Wed, 12 Sep 2018 18:36:25 +0500 Subject: [PATCH 157/889] DOC use autodocs for selectors; document more methods and attributes; suggest get/getall --- docs/topics/selectors.rst | 114 +++++++++---------------------------- scrapy/selector/unified.py | 33 +++++++++++ 2 files changed, 60 insertions(+), 87 deletions(-) diff --git a/docs/topics/selectors.rst b/docs/topics/selectors.rst index 2db982b37..95d6a1a04 100644 --- a/docs/topics/selectors.rst +++ b/docs/topics/selectors.rst @@ -891,127 +891,67 @@ Built-in Selectors reference Selector objects ---------------- -.. class:: Selector(response=None, text=None, type=None) +.. autoclass:: Selector - An instance of :class:`Selector` is a wrapper over response to select - certain parts of its content. - - ``response`` is an :class:`~scrapy.http.HtmlResponse` or an - :class:`~scrapy.http.XmlResponse` object that will be used for selecting and - extracting data. - - ``text`` is a unicode string or utf-8 encoded text for cases when a - ``response`` isn't available. Using ``text`` and ``response`` together is - undefined behavior. - - ``type`` defines the selector type, it can be ``"html"``, ``"xml"`` or ``None`` (default). - - If ``type`` is ``None``, the selector automatically chooses the best type - based on ``response`` type (see below), or defaults to ``"html"`` in case it - is used together with ``text``. - - If ``type`` is ``None`` and a ``response`` is passed, the selector type is - inferred from the response type as follows: - - * ``"html"`` for :class:`~scrapy.http.HtmlResponse` type - * ``"xml"`` for :class:`~scrapy.http.XmlResponse` type - * ``"html"`` for anything else - - Otherwise, if ``type`` is set, the selector type will be forced and no - detection will occur. - - .. method:: xpath(query) - - Find nodes matching the xpath ``query`` and return the result as a - :class:`SelectorList` instance with all elements flattened. List - elements implement :class:`Selector` interface too. - - ``query`` is a string containing the XPATH query to apply. + .. automethod:: xpath .. note:: For convenience, this method can be called as ``response.xpath()`` - .. method:: css(query) - - Apply the given CSS selector and return a :class:`SelectorList` instance. - - ``query`` is a string containing the CSS selector to apply. - - In the background, CSS queries are translated into XPath queries using - `cssselect`_ library and run ``.xpath()`` method. + .. automethod:: css .. note:: - For convenience this method can be called as ``response.css()`` + For convenience, this method can be called as ``response.css()`` - .. method:: extract() + .. automethod:: get - Serialize and return the matched nodes as a list of unicode strings. - Percent encoded content is unquoted. + See also: :ref:`old-extraction-api` - .. method:: re(regex) + .. autoattribute:: attrib - Apply the given regex and return a list of unicode strings with the - matches. + See also: :ref:`selecting-attributes`. - ``regex`` can be either a compiled regular expression or a string which - will be compiled to a regular expression using ``re.compile(regex)`` + .. automethod:: re - .. note:: + .. automethod:: re_first - Note that ``re()`` and ``re_first()`` both decode HTML entities (except ``<`` and ``&``). + .. automethod:: register_namespace - .. method:: register_namespace(prefix, uri) + .. automethod:: remove_namespaces - Register the given namespace to be used in this :class:`Selector`. - Without registering namespaces you can't select or extract data from - non-standard namespaces. See examples below. + .. automethod:: __bool__ - .. method:: remove_namespaces() - - Remove all namespaces, allowing to traverse the document using - namespace-less xpaths. See example below. - - .. method:: __nonzero__() - - Returns ``True`` if there is any real content selected or ``False`` - otherwise. In other words, the boolean value of a :class:`Selector` is - given by the contents it selects. + .. automethod:: getall + This method is added to Selector for consistency; it is more useful + with SelectorList. See also: :ref:`old-extraction-api` SelectorList objects -------------------- -.. class:: SelectorList +.. autoclass:: SelectorList - The :class:`SelectorList` class is a subclass of the builtin ``list`` - class, which provides a few additional methods. + .. automethod:: xpath - .. method:: xpath(query) + .. automethod:: css - Call the ``.xpath()`` method for each element in this list and return - their results flattened as another :class:`SelectorList`. + .. automethod:: getall - ``query`` is the same argument as the one in :meth:`Selector.xpath` + See also: :ref:`old-extraction-api` - .. method:: css(query) + .. automethod:: get - Call the ``.css()`` method for each element in this list and return - their results flattened as another :class:`SelectorList`. + See also: :ref:`old-extraction-api` - ``query`` is the same argument as the one in :meth:`Selector.css` + .. automethod:: re - .. method:: extract() + .. automethod:: re_first - Call the ``.extract()`` method for each element in this list and return - their results flattened, as a list of unicode strings. - - .. method:: re() - - Call the ``.re()`` method for each element in this list and return - their results flattened, as a list of unicode strings. + .. autoattribute:: attrib + See also: :ref:`selecting-attributes`. .. _selector-examples: diff --git a/scrapy/selector/unified.py b/scrapy/selector/unified.py index 64cb0232c..8f6cb1d79 100644 --- a/scrapy/selector/unified.py +++ b/scrapy/selector/unified.py @@ -27,6 +27,10 @@ def _response_from_text(text, st): class SelectorList(_ParselSelector.selectorlist_cls, object_ref): + """ + The :class:`SelectorList` class is a subclass of the builtin ``list`` + class, which provides a few additional methods. + """ @deprecated(use_instead='.extract()') def extract_unquoted(self): return [x.extract_unquoted() for x in self] @@ -41,6 +45,35 @@ class SelectorList(_ParselSelector.selectorlist_cls, object_ref): class Selector(_ParselSelector, object_ref): + """ + An instance of :class:`Selector` is a wrapper over response to select + certain parts of its content. + + ``response`` is an :class:`~scrapy.http.HtmlResponse` or an + :class:`~scrapy.http.XmlResponse` object that will be used for selecting + and extracting data. + + ``text`` is a unicode string or utf-8 encoded text for cases when a + ``response`` isn't available. Using ``text`` and ``response`` together is + undefined behavior. + + ``type`` defines the selector type, it can be ``"html"``, ``"xml"`` + or ``None`` (default). + + If ``type`` is ``None``, the selector automatically chooses the best type + based on ``response`` type (see below), or defaults to ``"html"`` in case it + is used together with ``text``. + + If ``type`` is ``None`` and a ``response`` is passed, the selector type is + inferred from the response type as follows: + + * ``"html"`` for :class:`~scrapy.http.HtmlResponse` type + * ``"xml"`` for :class:`~scrapy.http.XmlResponse` type + * ``"html"`` for anything else + + Otherwise, if ``type`` is set, the selector type will be forced and no + detection will occur. + """ __slots__ = ['response'] selectorlist_cls = SelectorList From 9db21e55028feec932136e74dad0c0f0dbe7f436 Mon Sep 17 00:00:00 2001 From: Mikhail Korobov Date: Sat, 15 Sep 2018 02:43:37 +0500 Subject: [PATCH 158/889] DOC fix remove_namespaces example See https://github.com/scrapy/parsel/pull/119 --- docs/topics/selectors.rst | 27 +++++++++++++++------------ 1 file changed, 15 insertions(+), 12 deletions(-) diff --git a/docs/topics/selectors.rst b/docs/topics/selectors.rst index 95d6a1a04..20c3fff3c 100644 --- a/docs/topics/selectors.rst +++ b/docs/topics/selectors.rst @@ -643,27 +643,30 @@ namespaces altogether and just work with element names, to write more simple/convenient XPaths. You can use the :meth:`Selector.remove_namespaces` method for that. -Let's show an example that illustrates this with GitHub blog atom feed. +Let's show an example that illustrates this with the Python Insider blog atom feed. .. highlight:: sh First, we open the shell with the url we want to scrape:: - $ scrapy shell https://github.com/blog.atom - -.. highlight:: xml + $ scrapy shell https://feeds.feedburner.com/PythonInsider This is how the file starts:: - - tag:github.com,2008:/blog + ... -You can see two namespace declarations: a default "http://www.w3.org/2005/Atom" -and another one using the "media:" prefix for "http://search.yahoo.com/mrss/". +You can see several namespace declarations including a default +"http://www.w3.org/2005/Atom" and another one using the "gd:" prefix for +"http://schemas.google.com/g/2005". .. highlight:: python @@ -678,8 +681,8 @@ nodes can be accessed directly by their names:: >>> response.selector.remove_namespaces() >>> response.xpath("//link") - [, - , + [, + , ... If you wonder why the namespace removal procedure isn't always called by default From 2c3b2158c99953823500f275ccc5206c11c9a811 Mon Sep 17 00:00:00 2001 From: Mikhail Korobov Date: Tue, 18 Sep 2018 05:02:17 +0500 Subject: [PATCH 159/889] DOC address @stummjr's review comments * fixed several small issues * re-written "Creating Selectors" section * fixed remaining .extract usage in tests --- docs/intro/tutorial.rst | 6 ++-- docs/topics/selectors.rst | 52 +++++++++++++++++++---------------- tests/test_utils_iterators.py | 4 +-- 3 files changed, 33 insertions(+), 29 deletions(-) diff --git a/docs/intro/tutorial.rst b/docs/intro/tutorial.rst index 46e84b21c..ad17ef096 100644 --- a/docs/intro/tutorial.rst +++ b/docs/intro/tutorial.rst @@ -285,9 +285,9 @@ There's a lesson here: for most scraping code, you want it to be resilient to errors due to things not being found on a page, so that even if some parts fail to be scraped, you can at least get **some** data. -Besides the :meth:`~scrapy.selector.Selector.extract` and +Besides the :meth:`~scrapy.selector.SelectorList.getall` and :meth:`~scrapy.selector.SelectorList.get` methods, you can also use -the :meth:`~scrapy.selector.Selector.re` method to extract using `regular +the :meth:`~scrapy.selector.SelectorList.re` method to extract using `regular expressions`_:: >>> response.css('title::text').re(r'Quotes.*') @@ -649,7 +649,7 @@ this time for scraping author information:: def parse_author(self, response): def extract_with_css(query): - return response.css(query).get().strip() + return response.css(query).get(default='').strip() yield { 'name': extract_with_css('h3.author-title::text'), diff --git a/docs/topics/selectors.rst b/docs/topics/selectors.rst index 20c3fff3c..68913c697 100644 --- a/docs/topics/selectors.rst +++ b/docs/topics/selectors.rst @@ -50,28 +50,8 @@ Constructing selectors .. highlight:: python -Scrapy selectors are instances of :class:`~scrapy.selector.Selector` class -constructed by passing **text** or :class:`~scrapy.http.TextResponse` -object. It automatically chooses the best parsing rules (XML vs HTML) based on -input type:: - - >>> from scrapy.selector import Selector - >>> from scrapy.http import HtmlResponse - -Constructing from text:: - - >>> body = 'good' - >>> Selector(text=body).xpath('//span/text()').get() - 'good' - -Constructing from response:: - - >>> response = HtmlResponse(url='http://example.com', body=body) - >>> Selector(response=response).xpath('//span/text()').get() - 'good' - -For convenience, response objects expose a selector on `.selector` attribute. -By using it you can ensure the response body is parsed only once:: +Response objects expose a :class:`~scrapy.selector.Selector` instance +on ``.selector`` attribute:: >>> response.selector.xpath('//span/text()').get() 'good' @@ -84,10 +64,34 @@ more shortcuts: ``response.xpath()`` and ``response.css()``:: >>> response.css('span::text').get() 'good' +Scrapy selectors are instances of :class:`~scrapy.selector.Selector` class +constructed by passing either :class:`~scrapy.http.TextResponse` object or +markup as an unicode string (in ``text`` argument). Usually there is no need to construct Scrapy selectors manually: ``response`` object is available in Spider callbacks, so in most cases it is more convenient to use ``response.css()`` and ``response.xpath()`` -shortcuts. +shortcuts. By using ``response.selector`` or one of these shortcuts +you can also ensure the response body is parsed only once. + +But if required, it is possible to use ``Selector`` directly. +Constructing from text:: + + >>> from scrapy.selector import Selector + >>> body = 'good' + >>> Selector(text=body).xpath('//span/text()').get() + 'good' + +Constructing from response - :class:`~scrapy.http.HtmlResponse` is one of +:class:`~scrapy.http.TextResponse` subclasses:: + + >>> from scrapy.selector import Selector + >>> from scrapy.http import HtmlResponse + >>> response = HtmlResponse(url='http://example.com', body=body) + >>> Selector(response=response).xpath('//span/text()').get() + 'good' + +``Selector`` automatically chooses the best parsing rules +(XML vs HTML) based on input type. Using selectors --------------- @@ -139,7 +143,7 @@ is returned. ``.getall()`` returns a list with all results. Notice that CSS selectors can select text or attribute nodes using CSS3 pseudo-elements:: - >>> selector.css('title::text').get() + >>> response.css('title::text').get() 'Example website' As you can see, ``.xpath()`` and ``.css()`` methods return a diff --git a/tests/test_utils_iterators.py b/tests/test_utils_iterators.py index 00eb78068..2d845697e 100644 --- a/tests/test_utils_iterators.py +++ b/tests/test_utils_iterators.py @@ -32,8 +32,8 @@ class XmliterTestCase(unittest.TestCase): for x in self.xmliter(response, 'product'): attrs.append(( x.attrib['id'], - x.xpath("name/text()").extract(), - x.xpath("./type/text()").extract())) + x.xpath("name/text()").getall(), + x.xpath("./type/text()").getall())) self.assertEqual(attrs, [('001', ['Name 1'], ['Type 1']), ('002', ['Name 2'], ['Type 2'])]) From ffbd33edac0367e9f975b9863e0c31e1c2b72ebc Mon Sep 17 00:00:00 2001 From: Mikhail Korobov Date: Tue, 18 Sep 2018 05:03:35 +0500 Subject: [PATCH 160/889] DOC mention gotcha with `foo::text` selector and empty `foo` elements also, move "Selecting attributes" reference closer to `a::atr(href)` example --- docs/topics/selectors.rst | 20 ++++++++++++++++---- 1 file changed, 16 insertions(+), 4 deletions(-) diff --git a/docs/topics/selectors.rst b/docs/topics/selectors.rst index 68913c697..9dced7473 100644 --- a/docs/topics/selectors.rst +++ b/docs/topics/selectors.rst @@ -279,6 +279,19 @@ Examples: 'Name: My image 5 ', '\n '] +* ``foo::text`` returns no results if ``foo`` element exists, but contains + no text (i.e. text is empty):: + + >>> response.css('img::text').getall() + [] + + This means ``.css('foo::text').get()`` could return None even if an element + exists. Use ``default=''`` if you always want a string:: + + >>> response.css('img::text').get() + >>> response.css('img::text').get(default='') + '' + * ``a::attr(href)`` selects the *href* attribute value of descendant links:: >>> response.css('a::attr(href)').getall() @@ -288,15 +301,14 @@ Examples: 'image4.html', 'image5.html'] +.. note:: + See also: :ref:`selecting-attributes`. + .. note:: You cannot chain these pseudo-elements. But in practice it would not make much sense: text nodes do not have attributes, and attribute values are string values already and do not have children nodes. -.. note:: - See also: :ref:`selecting-attributes`. - - .. _CSS Selectors: https://www.w3.org/TR/css3-selectors/#selectors .. _topics-selectors-nesting-selectors: From 37cfb49805c86168af7a831fc33ec4aeb83e53da Mon Sep 17 00:00:00 2001 From: Henrique Coura Date: Mon, 24 Sep 2018 16:42:49 -0300 Subject: [PATCH 161/889] Randomly generate telnet credentials by default --- scrapy/extensions/telnet.py | 25 +++++++++--- scrapy/settings/default_settings.py | 2 - tests/test_extension_telnet.py | 59 +++++++++++++++++++++++++++++ 3 files changed, 79 insertions(+), 7 deletions(-) create mode 100644 tests/test_extension_telnet.py diff --git a/scrapy/extensions/telnet.py b/scrapy/extensions/telnet.py index 93342f225..3d0afeffb 100644 --- a/scrapy/extensions/telnet.py +++ b/scrapy/extensions/telnet.py @@ -7,6 +7,8 @@ See documentation in docs/topics/telnetconsole.rst import pprint import logging import traceback +import binascii +import os from twisted.internet import protocol try: @@ -50,8 +52,21 @@ class TelnetConsole(protocol.ServerFactory): self.noisy = False self.portrange = [int(x) for x in crawler.settings.getlist('TELNETCONSOLE_PORT')] self.host = crawler.settings['TELNETCONSOLE_HOST'] - self.username = crawler.settings['TELNETCONSOLE_USERNAME'] - self.password = crawler.settings['TELNETCONSOLE_PASSWORD'] + + username = crawler.settings.get('TELNETCONSOLE_USERNAME', None) + if username: + self.username = username.encode('utf8') + else: + self.username = binascii.hexlify(os.urandom(8)) + + password = crawler.settings.get('TELNETCONSOLE_PASSWORD', None) + if password: + self.password = password.encode('utf8') + else: + self.password = binascii.hexlify(os.urandom(8)) + + logger.info('Telnet Username: %s' % self.username) + logger.info('Telnet Password: %s' % self.password) self.crawler.signals.connect(self.start_listening, signals.engine_started) self.crawler.signals.connect(self.stop_listening, signals.engine_stopped) @@ -74,8 +89,8 @@ class TelnetConsole(protocol.ServerFactory): """An implementation of IPortal""" @defers def login(self_, credentials, mind, *interfaces): - if not (credentials.username == self.username - and credentials.checkPassword(self.password)): + if not (credentials.username == self.username and + credentials.checkPassword(self.password)): raise ValueError("Invalid credentials") protocol = telnet.TelnetBootstrapProtocol( @@ -104,7 +119,7 @@ class TelnetConsole(protocol.ServerFactory): 'p': pprint.pprint, 'prefs': print_live_refs, 'hpy': hpy, - 'help': "This is Scrapy telnet console. For more info see: " \ + 'help': "This is Scrapy telnet console. For more info see: " "https://doc.scrapy.org/en/latest/topics/telnetconsole.html", } self.crawler.signals.send_catch_log(update_telnet_vars, telnet_vars=telnet_vars) diff --git a/scrapy/settings/default_settings.py b/scrapy/settings/default_settings.py index 2b7bc173c..ca004aedd 100644 --- a/scrapy/settings/default_settings.py +++ b/scrapy/settings/default_settings.py @@ -277,8 +277,6 @@ USER_AGENT = 'Scrapy/%s (+https://scrapy.org)' % import_module('scrapy').__versi TELNETCONSOLE_ENABLED = 1 TELNETCONSOLE_PORT = [6023, 6073] TELNETCONSOLE_HOST = '127.0.0.1' -TELNETCONSOLE_USERNAME = 'scrapy' -TELNETCONSOLE_PASSWORD = 'scrapy' SPIDER_CONTRACTS = {} SPIDER_CONTRACTS_BASE = { diff --git a/tests/test_extension_telnet.py b/tests/test_extension_telnet.py new file mode 100644 index 000000000..ffea1c463 --- /dev/null +++ b/tests/test_extension_telnet.py @@ -0,0 +1,59 @@ +try: + import unittest.mock as mock +except ImportError: + import mock + +from twisted.trial import unittest +from twisted.conch.telnet import ITelnetProtocol +from twisted.cred import credentials +from twisted.internet import defer + +from scrapy.extensions.telnet import TelnetConsole, logger +from scrapy.utils.test import get_crawler + + +class TelnetExtensionTest(unittest.TestCase): + def _get_console_and_portal(self, settings=None): + crawler = get_crawler(settings_dict=settings) + console = TelnetConsole(crawler) + username = console.username + password = console.password + + def _get_telnet_vars(): + # This function has some side effects we don't need for this test + return {} + console._get_telnet_vars = _get_telnet_vars + + console.start_listening() + protocol = console.protocol() + portal = protocol.protocolArgs[0] + + return console, portal + + @defer.inlineCallbacks + def test_bad_credentials(self): + console, portal = self._get_console_and_portal() + creds = credentials.UsernamePassword(b'username', b'password') + d = portal.login(creds, None, ITelnetProtocol) + yield self.assertFailure(d, ValueError) + console.stop_listening() + + @defer.inlineCallbacks + def test_good_credentials(self): + console, portal = self._get_console_and_portal() + creds = credentials.UsernamePassword(console.username, console.password) + d = portal.login(creds, None, ITelnetProtocol) + yield d + console.stop_listening() + + @defer.inlineCallbacks + def test_custom_credentials(self): + settings = { + 'TELNETCONSOLE_USERNAME': 'user', + 'TELNETCONSOLE_PASSWORD': 'pass', + } + console, portal = self._get_console_and_portal(settings=settings) + creds = credentials.UsernamePassword(b'user', b'pass') + d = portal.login(creds, None, ITelnetProtocol) + yield d + console.stop_listening() From e57a629efc0846ed396247baf22d7846689b82e4 Mon Sep 17 00:00:00 2001 From: Henrique Coura Date: Wed, 26 Sep 2018 11:54:57 -0300 Subject: [PATCH 162/889] Generate only password, encode username/password only on login --- scrapy/extensions/telnet.py | 22 ++++++++-------------- scrapy/settings/default_settings.py | 2 ++ tests/test_extension_telnet.py | 5 ++++- 3 files changed, 14 insertions(+), 15 deletions(-) diff --git a/scrapy/extensions/telnet.py b/scrapy/extensions/telnet.py index 3d0afeffb..6df435cef 100644 --- a/scrapy/extensions/telnet.py +++ b/scrapy/extensions/telnet.py @@ -53,20 +53,14 @@ class TelnetConsole(protocol.ServerFactory): self.portrange = [int(x) for x in crawler.settings.getlist('TELNETCONSOLE_PORT')] self.host = crawler.settings['TELNETCONSOLE_HOST'] - username = crawler.settings.get('TELNETCONSOLE_USERNAME', None) - if username: - self.username = username.encode('utf8') - else: - self.username = binascii.hexlify(os.urandom(8)) + self.username = crawler.settings['TELNETCONSOLE_USERNAME'] + self.password = crawler.settings['TELNETCONSOLE_PASSWORD'] - password = crawler.settings.get('TELNETCONSOLE_PASSWORD', None) - if password: - self.password = password.encode('utf8') - else: - self.password = binascii.hexlify(os.urandom(8)) + if not self.password: + self.password = binascii.hexlify(os.urandom(8)).decode('utf8') + logger.info('Telnet Username: %s', self.username) + logger.info('Telnet Password: %s', self.password) - logger.info('Telnet Username: %s' % self.username) - logger.info('Telnet Password: %s' % self.password) self.crawler.signals.connect(self.start_listening, signals.engine_started) self.crawler.signals.connect(self.stop_listening, signals.engine_stopped) @@ -89,8 +83,8 @@ class TelnetConsole(protocol.ServerFactory): """An implementation of IPortal""" @defers def login(self_, credentials, mind, *interfaces): - if not (credentials.username == self.username and - credentials.checkPassword(self.password)): + if not (credentials.username == self.username.encode('utf8') and + credentials.checkPassword(self.password.encode('utf8'))): raise ValueError("Invalid credentials") protocol = telnet.TelnetBootstrapProtocol( diff --git a/scrapy/settings/default_settings.py b/scrapy/settings/default_settings.py index ca004aedd..3734a0a58 100644 --- a/scrapy/settings/default_settings.py +++ b/scrapy/settings/default_settings.py @@ -277,6 +277,8 @@ USER_AGENT = 'Scrapy/%s (+https://scrapy.org)' % import_module('scrapy').__versi TELNETCONSOLE_ENABLED = 1 TELNETCONSOLE_PORT = [6023, 6073] TELNETCONSOLE_HOST = '127.0.0.1' +TELNETCONSOLE_USERNAME = 'scrapy' +TELNETCONSOLE_PASSWORD = None SPIDER_CONTRACTS = {} SPIDER_CONTRACTS_BASE = { diff --git a/tests/test_extension_telnet.py b/tests/test_extension_telnet.py index ffea1c463..487c7c29f 100644 --- a/tests/test_extension_telnet.py +++ b/tests/test_extension_telnet.py @@ -41,7 +41,10 @@ class TelnetExtensionTest(unittest.TestCase): @defer.inlineCallbacks def test_good_credentials(self): console, portal = self._get_console_and_portal() - creds = credentials.UsernamePassword(console.username, console.password) + creds = credentials.UsernamePassword( + console.username.encode('utf8'), + console.password.encode('utf8') + ) d = portal.login(creds, None, ITelnetProtocol) yield d console.stop_listening() From 5f9931d2ada7a2a05df77b1c061eeb482fcda347 Mon Sep 17 00:00:00 2001 From: Henrique Coura Date: Wed, 26 Sep 2018 13:07:04 -0300 Subject: [PATCH 163/889] do not log username --- scrapy/extensions/telnet.py | 1 - 1 file changed, 1 deletion(-) diff --git a/scrapy/extensions/telnet.py b/scrapy/extensions/telnet.py index 6df435cef..a3d55f3c6 100644 --- a/scrapy/extensions/telnet.py +++ b/scrapy/extensions/telnet.py @@ -58,7 +58,6 @@ class TelnetConsole(protocol.ServerFactory): if not self.password: self.password = binascii.hexlify(os.urandom(8)).decode('utf8') - logger.info('Telnet Username: %s', self.username) logger.info('Telnet Password: %s', self.password) self.crawler.signals.connect(self.start_listening, signals.engine_started) From 441e1e750fe7ad970adafc4c1f42834f7db86d1d Mon Sep 17 00:00:00 2001 From: Henrique Coura Date: Wed, 26 Sep 2018 13:28:34 -0300 Subject: [PATCH 164/889] Style changes --- scrapy/extensions/telnet.py | 3 +-- tests/test_extension_telnet.py | 8 +++----- 2 files changed, 4 insertions(+), 7 deletions(-) diff --git a/scrapy/extensions/telnet.py b/scrapy/extensions/telnet.py index a3d55f3c6..dcf73eb88 100644 --- a/scrapy/extensions/telnet.py +++ b/scrapy/extensions/telnet.py @@ -52,7 +52,6 @@ class TelnetConsole(protocol.ServerFactory): self.noisy = False self.portrange = [int(x) for x in crawler.settings.getlist('TELNETCONSOLE_PORT')] self.host = crawler.settings['TELNETCONSOLE_HOST'] - self.username = crawler.settings['TELNETCONSOLE_USERNAME'] self.password = crawler.settings['TELNETCONSOLE_PASSWORD'] @@ -113,7 +112,7 @@ class TelnetConsole(protocol.ServerFactory): 'prefs': print_live_refs, 'hpy': hpy, 'help': "This is Scrapy telnet console. For more info see: " - "https://doc.scrapy.org/en/latest/topics/telnetconsole.html", + "https://doc.scrapy.org/en/latest/topics/telnetconsole.html", } self.crawler.signals.send_catch_log(update_telnet_vars, telnet_vars=telnet_vars) return telnet_vars diff --git a/tests/test_extension_telnet.py b/tests/test_extension_telnet.py index 487c7c29f..4f389e5cb 100644 --- a/tests/test_extension_telnet.py +++ b/tests/test_extension_telnet.py @@ -12,17 +12,15 @@ from scrapy.extensions.telnet import TelnetConsole, logger from scrapy.utils.test import get_crawler -class TelnetExtensionTest(unittest.TestCase): +class TelnetExtensionTest(unittest.TestCase): def _get_console_and_portal(self, settings=None): crawler = get_crawler(settings_dict=settings) console = TelnetConsole(crawler) username = console.username password = console.password - def _get_telnet_vars(): - # This function has some side effects we don't need for this test - return {} - console._get_telnet_vars = _get_telnet_vars + # This function has some side effects we don't need for this test + console._get_telnet_vars = lambda: {} console.start_listening() protocol = console.protocol() From edaf74bfaeef7d995676ad8f6bfb8056a8e6966d Mon Sep 17 00:00:00 2001 From: jfflisikowski Date: Tue, 2 Oct 2018 19:48:48 +0200 Subject: [PATCH 165/889] Correct the unclear comments by adding <# < processing code not shown > --- docs/topics/debug.rst | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/docs/topics/debug.rst b/docs/topics/debug.rst index d1991c02f..f93aa2c72 100644 --- a/docs/topics/debug.rst +++ b/docs/topics/debug.rst @@ -18,11 +18,13 @@ Consider the following scrapy spider below:: ) def parse(self, response): - # collect `item_urls` + # + # collect `item_urls` for item_url in item_urls: yield scrapy.Request(item_url, self.parse_item) def parse_item(self, response): + # item = MyItem() # populate `item` fields # and extract item_details_url From 58f5565357ed532970772cd55c2d17d1e00198a9 Mon Sep 17 00:00:00 2001 From: Eugenio Lacuesta Date: Thu, 11 Oct 2018 11:23:12 -0300 Subject: [PATCH 166/889] Move MutableChain to scrapy.utils.python --- scrapy/core/spidermw.py | 21 +-------------------- scrapy/utils/python.py | 21 +++++++++++++++++++++ 2 files changed, 22 insertions(+), 20 deletions(-) diff --git a/scrapy/core/spidermw.py b/scrapy/core/spidermw.py index 4268c91d6..d776430e5 100644 --- a/scrapy/core/spidermw.py +++ b/scrapy/core/spidermw.py @@ -11,32 +11,13 @@ from scrapy.exceptions import _InvalidOutput from scrapy.middleware import MiddlewareManager from scrapy.utils.defer import mustbe_deferred from scrapy.utils.conf import build_component_list +from scrapy.utils.python import MutableChain def _isiterable(possible_iterator): return hasattr(possible_iterator, '__iter__') -class MutableChain: - """ - Thin wrapper around itertools.chain, allowing to add iterables "in-place" - """ - def __init__(self, *args): - self.data = chain(*args) - - def extend(self, *iterables): - self.data = chain(self.data, *iterables) - - def __iter__(self): - return self.data.__iter__() - - def __next__(self): # py3 - return self.data.__next__() - - def next(self): # py2 - return self.data.next() - - class SpiderMiddlewareManager(MiddlewareManager): component_name = 'spider middleware' diff --git a/scrapy/utils/python.py b/scrapy/utils/python.py index 732ca13a0..7971b4dde 100644 --- a/scrapy/utils/python.py +++ b/scrapy/utils/python.py @@ -9,6 +9,7 @@ import weakref import errno import six from functools import partial, wraps +from itertools import chain import sys from scrapy.utils.decorators import deprecated @@ -387,3 +388,23 @@ if hasattr(sys, "pypy_version_info"): else: def garbage_collect(): gc.collect() + + +class MutableChain(object): + """ + Thin wrapper around itertools.chain, allowing to add iterables "in-place" + """ + def __init__(self, *args): + self.data = chain(*args) + + def extend(self, *iterables): + self.data = chain(self.data, *iterables) + + def __iter__(self): + return self.data.__iter__() + + def __next__(self): # py3 + return self.data.__next__() + + def next(self): # py2 + return self.data.next() From a05eaeed73a469493e78b5a1c5f0b4de2adf41c2 Mon Sep 17 00:00:00 2001 From: Eugenio Lacuesta Date: Thu, 11 Oct 2018 11:31:51 -0300 Subject: [PATCH 167/889] Simplify MutableChain --- scrapy/utils/python.py | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) diff --git a/scrapy/utils/python.py b/scrapy/utils/python.py index 7971b4dde..1a6bab990 100644 --- a/scrapy/utils/python.py +++ b/scrapy/utils/python.py @@ -403,8 +403,7 @@ class MutableChain(object): def __iter__(self): return self.data.__iter__() - def __next__(self): # py3 - return self.data.__next__() + def __next__(self): + return next(self.data) - def next(self): # py2 - return self.data.next() + next = __next__ From 15f0a890ee9f059111333fdeb6c6c3b5a8dadc07 Mon Sep 17 00:00:00 2001 From: Eugenio Lacuesta Date: Thu, 11 Oct 2018 11:34:59 -0300 Subject: [PATCH 168/889] Assign processing methods to a variable before iterating --- scrapy/core/spidermw.py | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/scrapy/core/spidermw.py b/scrapy/core/spidermw.py index d776430e5..3fae770a9 100644 --- a/scrapy/core/spidermw.py +++ b/scrapy/core/spidermw.py @@ -58,7 +58,8 @@ class SpiderMiddlewareManager(MiddlewareManager): # don't handle _InvalidOutput exception if isinstance(exception, _InvalidOutput): return _failure - for method_index, method in enumerate(self.methods['process_spider_exception'][start_index:], start=start_index): + method_list = self.methods['process_spider_exception'][start_index:] + for method_index, method in enumerate(method_list, start=start_index): if method is None: continue result = method(response=response, exception=exception, spider=spider) @@ -88,7 +89,8 @@ class SpiderMiddlewareManager(MiddlewareManager): raise recovered.extend(exception_result) - for method_index, method in enumerate(self.methods['process_spider_output'][start_index:], start=start_index): + method_list = self.methods['process_spider_output'][start_index:] + for method_index, method in enumerate(method_list, start=start_index): if method is None: continue # the following might fail directly if the output value is not a generator From e0360e5223b618934ee006b4c9ed63012e7e621f Mon Sep 17 00:00:00 2001 From: Eugenio Lacuesta Date: Thu, 11 Oct 2018 11:55:13 -0300 Subject: [PATCH 169/889] Add tests for MutableChain --- tests/test_utils_python.py | 14 +++++++++++++- 1 file changed, 13 insertions(+), 1 deletion(-) diff --git a/tests/test_utils_python.py b/tests/test_utils_python.py index f6133657b..3e1148354 100644 --- a/tests/test_utils_python.py +++ b/tests/test_utils_python.py @@ -9,11 +9,23 @@ import six from scrapy.utils.python import ( memoizemethod_noargs, binary_is_text, equal_attributes, WeakKeyCache, stringify_dict, get_func_args, to_bytes, to_unicode, - without_none_values) + without_none_values, MutableChain) __doctests__ = ['scrapy.utils.python'] +class MutableChainTest(unittest.TestCase): + def test_mutablechain(self): + m = MutableChain(range(2), [2, 3], (4, 5)) + m.extend(range(6, 7)) + m.extend([7, 8]) + m.extend([9, 10], (11, 12)) + self.assertEqual(next(m), 0) + self.assertEqual(m.next(), 1) + self.assertEqual(m.__next__(), 2) + self.assertEqual(list(m), list(range(3, 13))) + + class ToUnicodeTest(unittest.TestCase): def test_converting_an_utf8_encoded_string_to_unicode(self): self.assertEqual(to_unicode(b'lel\xc3\xb1e'), u'lel\xf1e') From 92b7955d75eba3ddad1e4815cb80cf60c7a9a7a9 Mon Sep 17 00:00:00 2001 From: Henrique Coura Date: Tue, 16 Oct 2018 14:50:00 -0300 Subject: [PATCH 171/889] Add Telnet console authentication docs --- docs/topics/telnetconsole.rst | 36 ++++++++++++++++++++++++++++++++++- 1 file changed, 35 insertions(+), 1 deletion(-) diff --git a/docs/topics/telnetconsole.rst b/docs/topics/telnetconsole.rst index ce79c9f35..49c372598 100644 --- a/docs/topics/telnetconsole.rst +++ b/docs/topics/telnetconsole.rst @@ -26,8 +26,21 @@ The telnet console listens in the TCP port defined in the the console you need to type:: telnet localhost 6023 + Trying localhost... + Connected to localhost. + Escape character is '^]'. + Username: + Password: >>> - + +By default Username is ``scrapy`` and Password is autogenerated. The +autogenerated Password can be seen on scrapy logs like the example bellow:: + + 2018-10-16 14:35:21 [scrapy.extensions.telnet] INFO: Telnet Password: 16f92501e8a59326 + +Default Username and Password can be overriden by the settings +:setting:`TELNETCONSOLE_USERNAME` and :setting:`TELNETCONSOLE_PASSWORD` + You need the telnet program which comes installed by default in Windows, and most Linux distros. @@ -160,3 +173,24 @@ Default: ``'127.0.0.1'`` The interface the telnet console should listen on + +.. setting:: TELNETCONSOLE_USERNAME + +TELNETCONSOLE_USERNAME +------------------ + +Default: ``'scrapy'`` + +The username used for the telnet console + + +.. setting:: TELNETCONSOLE_PASSWORD + +TELNETCONSOLE_PASSWORD +------------------ + +Default: ``None`` + +The password used for the telnet console, default behaviour is to have it +autogenerated + From 44f8e28b3c8608f65dbc7836b36bc231e38393b7 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Daniel=20Gra=C3=B1a?= Date: Tue, 16 Oct 2018 19:53:20 -0300 Subject: [PATCH 172/889] Fix headings' underlines --- docs/topics/telnetconsole.rst | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/docs/topics/telnetconsole.rst b/docs/topics/telnetconsole.rst index 49c372598..4db9cafb2 100644 --- a/docs/topics/telnetconsole.rst +++ b/docs/topics/telnetconsole.rst @@ -177,7 +177,7 @@ The interface the telnet console should listen on .. setting:: TELNETCONSOLE_USERNAME TELNETCONSOLE_USERNAME ------------------- +---------------------- Default: ``'scrapy'`` @@ -187,7 +187,7 @@ The username used for the telnet console .. setting:: TELNETCONSOLE_PASSWORD TELNETCONSOLE_PASSWORD ------------------- +---------------------- Default: ``None`` From c9b5bd6ad7728274b0f82fc3211c5ade5cd0d389 Mon Sep 17 00:00:00 2001 From: Immanuella Lim Date: Thu, 18 Oct 2018 02:22:32 +0800 Subject: [PATCH 173/889] Remove ad link Dive Into Python3 from tutorial docs --- docs/intro/tutorial.rst | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/docs/intro/tutorial.rst b/docs/intro/tutorial.rst index ad17ef096..143e018ac 100644 --- a/docs/intro/tutorial.rst +++ b/docs/intro/tutorial.rst @@ -23,7 +23,7 @@ start by getting an idea of what the language is like, to get the most out of Scrapy. If you're already familiar with other languages, and want to learn Python -quickly, we recommend reading through `Dive Into Python 3`_. Alternatively, +quickly, we recommend reading through `Crash into Python`_. Alternatively, you can follow the `Python Tutorial`_. If you're new to programming and want to start with Python, the following books @@ -40,7 +40,7 @@ as well as the `suggested resources in the learnpython-subreddit`_. .. _Python: https://www.python.org/ .. _this list of Python resources for non-programmers: https://wiki.python.org/moin/BeginnersGuide/NonProgrammers -.. _Dive Into Python 3: http://www.diveintopython3.net +.. _Crash into Python: https://stephensugden.com/crash_into_python/ .. _Python Tutorial: https://docs.python.org/3/tutorial .. _Automate the Boring Stuff With Python: https://automatetheboringstuff.com/ .. _How To Think Like a Computer Scientist: http://openbookproject.net/thinkcs/python/english3e/ From f97e3e90f25c5077b47d9ec11a4cf84ea777227e Mon Sep 17 00:00:00 2001 From: Eugenio Lacuesta Date: Mon, 29 Oct 2018 12:40:20 -0300 Subject: [PATCH 174/889] Use collections.deque instead of list to store methods --- scrapy/core/downloader/middleware.py | 4 ++-- scrapy/core/spidermw.py | 6 +++--- scrapy/middleware.py | 6 +++--- tests/test_middleware.py | 6 +++--- 4 files changed, 11 insertions(+), 11 deletions(-) diff --git a/scrapy/core/downloader/middleware.py b/scrapy/core/downloader/middleware.py index c3b23e284..f5e2fca63 100644 --- a/scrapy/core/downloader/middleware.py +++ b/scrapy/core/downloader/middleware.py @@ -26,9 +26,9 @@ class DownloaderMiddlewareManager(MiddlewareManager): if hasattr(mw, 'process_request'): self.methods['process_request'].append(mw.process_request) if hasattr(mw, 'process_response'): - self.methods['process_response'].insert(0, mw.process_response) + self.methods['process_response'].appendleft(mw.process_response) if hasattr(mw, 'process_exception'): - self.methods['process_exception'].insert(0, mw.process_exception) + self.methods['process_exception'].appendleft(mw.process_exception) def download(self, download_func, request, spider): @defer.inlineCallbacks diff --git a/scrapy/core/spidermw.py b/scrapy/core/spidermw.py index a206e4b0c..16b8435ab 100644 --- a/scrapy/core/spidermw.py +++ b/scrapy/core/spidermw.py @@ -25,11 +25,11 @@ class SpiderMiddlewareManager(MiddlewareManager): if hasattr(mw, 'process_spider_input'): self.methods['process_spider_input'].append(mw.process_spider_input) if hasattr(mw, 'process_spider_output'): - self.methods['process_spider_output'].insert(0, mw.process_spider_output) + self.methods['process_spider_output'].appendleft(mw.process_spider_output) if hasattr(mw, 'process_spider_exception'): - self.methods['process_spider_exception'].insert(0, mw.process_spider_exception) + self.methods['process_spider_exception'].appendleft(mw.process_spider_exception) if hasattr(mw, 'process_start_requests'): - self.methods['process_start_requests'].insert(0, mw.process_start_requests) + self.methods['process_start_requests'].appendleft(mw.process_start_requests) def scrape_response(self, scrape_func, response, request, spider): fname = lambda f:'%s.%s' % ( diff --git a/scrapy/middleware.py b/scrapy/middleware.py index f2240984c..1cfd8a782 100644 --- a/scrapy/middleware.py +++ b/scrapy/middleware.py @@ -1,4 +1,4 @@ -from collections import defaultdict +from collections import defaultdict, deque import logging import pprint @@ -16,7 +16,7 @@ class MiddlewareManager(object): def __init__(self, *middlewares): self.middlewares = middlewares - self.methods = defaultdict(list) + self.methods = defaultdict(deque) for mw in middlewares: self._add_middleware(mw) @@ -56,7 +56,7 @@ class MiddlewareManager(object): if hasattr(mw, 'open_spider'): self.methods['open_spider'].append(mw.open_spider) if hasattr(mw, 'close_spider'): - self.methods['close_spider'].insert(0, mw.close_spider) + self.methods['close_spider'].appendleft(mw.close_spider) def _process_parallel(self, methodname, obj, *args): return process_parallel(self.methods[methodname], obj, *args) diff --git a/tests/test_middleware.py b/tests/test_middleware.py index b6d885330..aea0be825 100644 --- a/tests/test_middleware.py +++ b/tests/test_middleware.py @@ -60,9 +60,9 @@ class MiddlewareManagerTest(unittest.TestCase): def test_init(self): m1, m2, m3 = M1(), M2(), M3() mwman = TestMiddlewareManager(m1, m2, m3) - self.assertEqual(mwman.methods['open_spider'], [m1.open_spider, m2.open_spider]) - self.assertEqual(mwman.methods['close_spider'], [m2.close_spider, m1.close_spider]) - self.assertEqual(mwman.methods['process'], [m1.process, m3.process]) + self.assertEqual(list(mwman.methods['open_spider']), [m1.open_spider, m2.open_spider]) + self.assertEqual(list(mwman.methods['close_spider']), [m2.close_spider, m1.close_spider]) + self.assertEqual(list(mwman.methods['process']), [m1.process, m3.process]) def test_methods(self): mwman = TestMiddlewareManager(M1(), M2(), M3()) From 6c98010f110c432a2311c1aef1d463dc5a6ccba4 Mon Sep 17 00:00:00 2001 From: Immanuella Lim Date: Sun, 4 Nov 2018 16:04:45 +0800 Subject: [PATCH 175/889] Remove 'Dive into Python3' reference --- docs/intro/tutorial.rst | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-) diff --git a/docs/intro/tutorial.rst b/docs/intro/tutorial.rst index 143e018ac..41e61542a 100644 --- a/docs/intro/tutorial.rst +++ b/docs/intro/tutorial.rst @@ -22,9 +22,7 @@ Scrapy is written in Python_. If you're new to the language you might want to start by getting an idea of what the language is like, to get the most out of Scrapy. -If you're already familiar with other languages, and want to learn Python -quickly, we recommend reading through `Crash into Python`_. Alternatively, -you can follow the `Python Tutorial`_. +If you're already familiar with other languages, and want to learn Python quickly, the `Python Tutorial`_ is a good resource. If you're new to programming and want to start with Python, the following books may be useful to you: @@ -40,7 +38,6 @@ as well as the `suggested resources in the learnpython-subreddit`_. .. _Python: https://www.python.org/ .. _this list of Python resources for non-programmers: https://wiki.python.org/moin/BeginnersGuide/NonProgrammers -.. _Crash into Python: https://stephensugden.com/crash_into_python/ .. _Python Tutorial: https://docs.python.org/3/tutorial .. _Automate the Boring Stuff With Python: https://automatetheboringstuff.com/ .. _How To Think Like a Computer Scientist: http://openbookproject.net/thinkcs/python/english3e/ From 491929c212999aa816e561aeed19a902664d01e5 Mon Sep 17 00:00:00 2001 From: Todd Date: Fri, 16 Nov 2018 13:38:19 -0500 Subject: [PATCH 176/889] Include additional files in sdists In particular this includes files needed for running the tests, as well as the changelog. --- MANIFEST.in | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/MANIFEST.in b/MANIFEST.in index 94de4f3bf..ae7db51fa 100644 --- a/MANIFEST.in +++ b/MANIFEST.in @@ -3,13 +3,24 @@ include AUTHORS include INSTALL include LICENSE include MANIFEST.in +include NEWS + include scrapy/VERSION include scrapy/mime.types + +include codecov.yml +include conftest.py +include pytest.ini +include requirements-*.txt +include tox.ini + recursive-include scrapy/templates * recursive-include scrapy license.txt recursive-include docs * prune docs/build + recursive-include extras * recursive-include bin * recursive-include tests * + global-exclude __pycache__ *.py[cod] From 127bf499f1d6b4a924d87e39ff89b528586c78c7 Mon Sep 17 00:00:00 2001 From: Frederik Elwert Date: Fri, 16 Nov 2018 22:15:03 +0100 Subject: [PATCH 177/889] Add documentation to `scrapy shell` command. The special syntax required for local files (`./file.html`) is not documented as part of the `scrapy shell --help` output. This patch adds that. --- scrapy/commands/shell.py | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/scrapy/commands/shell.py b/scrapy/commands/shell.py index 40a58d94a..e05084272 100644 --- a/scrapy/commands/shell.py +++ b/scrapy/commands/shell.py @@ -28,7 +28,8 @@ class Command(ScrapyCommand): return "Interactive scraping console" def long_desc(self): - return "Interactive console for scraping the given url" + return ("Interactive console for scraping the given url or file. " + "Use ./file.html syntax or full path for local file.") def add_options(self, parser): ScrapyCommand.add_options(self, parser) From a25cf5c82f99f7ae11346a2e565d6255835c3814 Mon Sep 17 00:00:00 2001 From: Vostretsov Nikita Date: Tue, 20 Nov 2018 16:13:09 +0000 Subject: [PATCH 178/889] function to get unique file queues for any type of base queue --- scrapy/core/queues.py | 15 +++++++++++++++ 1 file changed, 15 insertions(+) create mode 100644 scrapy/core/queues.py diff --git a/scrapy/core/queues.py b/scrapy/core/queues.py new file mode 100644 index 000000000..96d582fc7 --- /dev/null +++ b/scrapy/core/queues.py @@ -0,0 +1,15 @@ +import uuid +import os.path + + +def unique_files_queue(queue_class): + + class UniqueFilesQueue(queue_class): + def __init__(self, path): + path = path + "-" + uuid.uuid4().hex + while os.path.exists(path): + path = path + "-" + uuid.uuid4().hex + + super().__init__(path) + + return UniqueFilesQueue From 1ce6662a9d7115348788972afce62a5c45199021 Mon Sep 17 00:00:00 2001 From: kasun Herath Date: Sat, 24 Nov 2018 20:02:00 +0530 Subject: [PATCH 179/889] Implement Request subclass for json requests --- scrapy/http/__init__.py | 1 + scrapy/http/request/json_request.py | 28 +++++++++++++++ tests/test_http_request.py | 55 ++++++++++++++++++++++++++++- 3 files changed, 83 insertions(+), 1 deletion(-) create mode 100644 scrapy/http/request/json_request.py diff --git a/scrapy/http/__init__.py b/scrapy/http/__init__.py index f04a9d3e5..4b2f7b33f 100644 --- a/scrapy/http/__init__.py +++ b/scrapy/http/__init__.py @@ -10,6 +10,7 @@ from scrapy.http.headers import Headers from scrapy.http.request import Request from scrapy.http.request.form import FormRequest from scrapy.http.request.rpc import XmlRpcRequest +from scrapy.http.request.json_request import JSONRequest from scrapy.http.response import Response from scrapy.http.response.html import HtmlResponse diff --git a/scrapy/http/request/json_request.py b/scrapy/http/request/json_request.py new file mode 100644 index 000000000..0fdd2ddf1 --- /dev/null +++ b/scrapy/http/request/json_request.py @@ -0,0 +1,28 @@ +""" +This module implements the JSONRequest class which is a more convenient class +(than Request) to generate JSON Requests. + +See documentation in docs/topics/request-response.rst +""" + +import json + +from scrapy.http.request import Request + + +class JSONRequest(Request): + def __init__(self, *args, **kwargs): + if 'method' not in kwargs: + kwargs['method'] = 'POST' + + data = kwargs.pop('data', {}) + kwargs['body'] = json.dumps(data) + super(JSONRequest, self).__init__(*args, **kwargs) + self.headers.setdefault(b'Content-Type', b'application/json') + + def replace(self, *args, **kwargs): + """ Create a new Request with the same attributes except for those + given new values. """ + + kwargs.pop('body', None) + return super(JSONRequest, self).replace(*args, **kwargs) diff --git a/tests/test_http_request.py b/tests/test_http_request.py index 58326a384..3f2e4f521 100644 --- a/tests/test_http_request.py +++ b/tests/test_http_request.py @@ -2,6 +2,7 @@ import cgi import unittest import re +import json import six from six.moves import xmlrpc_client as xmlrpclib @@ -9,7 +10,7 @@ from six.moves.urllib.parse import urlparse, parse_qs, unquote if six.PY3: from urllib.parse import unquote_to_bytes -from scrapy.http import Request, FormRequest, XmlRpcRequest, Headers, HtmlResponse +from scrapy.http import Request, FormRequest, XmlRpcRequest, JSONRequest, Headers, HtmlResponse from scrapy.utils.python import to_bytes, to_native_str @@ -1147,5 +1148,57 @@ class XmlRpcRequestTest(RequestTest): self._test_request(params=(u'pas£',), encoding='latin1') +class JSONRequestTest(RequestTest): + request_class = JSONRequest + default_method = 'POST' + default_headers = {b'Content-Type': [b'application/json']} + + def test_body(self): + r1 = self.request_class(url="http://www.example.com/") + self.assertEqual(r1.body, '{}') + + r2 = self.request_class(url="http://www.example.com/", body=b"") + self.assertEqual(r2.body, '{}') + + data = { + 'name': 'value', + } + r3 = self.request_class(url="http://www.example.com/", data=data) + self.assertEqual(r3.body, json.dumps(data)) + + r4 = self.request_class(url="http://www.example.com/", body='body1', data=data) + self.assertEqual(r3.body, json.dumps(data)) + + def test_replace(self): + """Test Request.replace() method""" + r1 = self.request_class("http://www.example.com") + hdrs = Headers(r1.headers) + hdrs[b'key'] = b'value' + r2 = r1.replace(body="New body", headers=hdrs) + + # body will not be replaced + self.assertEqual(r1.body, r2.body) + self.assertEqual(r1.url, r2.url) + self.assertEqual((r1.headers, r2.headers), (self.default_headers, hdrs)) + + # Empty attributes (which may fail if not compared properly) + r3 = self.request_class("http://www.example.com", meta={'a': 1}, dont_filter=True) + r4 = r3.replace(url="http://www.example.com/2", meta={}, dont_filter=False) + self.assertEqual(r4.url, "http://www.example.com/2") + self.assertEqual(r4.meta, {}) + assert r4.dont_filter is False + + data1 = { + 'name': 'value1', + } + data2 = { + 'name': 'value2', + } + r5 = self.request_class("http://www.example.com", data=data1) + r6 = r5.replace(url="http://www.example.com/2", data=data2) + self.assertNotEqual(r5.body, r6.body) + self.assertEqual((r5.body, r6.body), (json.dumps(data1), json.dumps(data2))) + + if __name__ == "__main__": unittest.main() From 1b2b8b4bf0c73b4ad143f943584545702d66cbb7 Mon Sep 17 00:00:00 2001 From: kasun Herath Date: Tue, 27 Nov 2018 08:57:44 +0530 Subject: [PATCH 180/889] fix tests under py3 --- tests/test_http_request.py | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/tests/test_http_request.py b/tests/test_http_request.py index 3f2e4f521..a2021bd65 100644 --- a/tests/test_http_request.py +++ b/tests/test_http_request.py @@ -1155,19 +1155,19 @@ class JSONRequestTest(RequestTest): def test_body(self): r1 = self.request_class(url="http://www.example.com/") - self.assertEqual(r1.body, '{}') + self.assertEqual(r1.body, b'{}') r2 = self.request_class(url="http://www.example.com/", body=b"") - self.assertEqual(r2.body, '{}') + self.assertEqual(r2.body, b'{}') data = { 'name': 'value', } r3 = self.request_class(url="http://www.example.com/", data=data) - self.assertEqual(r3.body, json.dumps(data)) + self.assertEqual(r3.body, to_bytes(json.dumps(data))) r4 = self.request_class(url="http://www.example.com/", body='body1', data=data) - self.assertEqual(r3.body, json.dumps(data)) + self.assertEqual(r3.body, to_bytes(json.dumps(data))) def test_replace(self): """Test Request.replace() method""" @@ -1197,7 +1197,7 @@ class JSONRequestTest(RequestTest): r5 = self.request_class("http://www.example.com", data=data1) r6 = r5.replace(url="http://www.example.com/2", data=data2) self.assertNotEqual(r5.body, r6.body) - self.assertEqual((r5.body, r6.body), (json.dumps(data1), json.dumps(data2))) + self.assertEqual((r5.body, r6.body), (to_bytes(json.dumps(data1)), to_bytes(json.dumps(data2)))) if __name__ == "__main__": From 274b65dff4dc8b8300d872171679f173fbe0a746 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Adri=C3=A1n=20Chaves?= Date: Mon, 3 Dec 2018 16:36:05 +0100 Subject: [PATCH 181/889] Add a troubleshooting section to the installation instructions Its initial content covers the workaround for #2473. --- docs/intro/install.rst | 31 ++++++++++++++++++++++++++++++- 1 file changed, 30 insertions(+), 1 deletion(-) diff --git a/docs/intro/install.rst b/docs/intro/install.rst index 4a9aa3cfb..daec7fcb7 100644 --- a/docs/intro/install.rst +++ b/docs/intro/install.rst @@ -30,7 +30,8 @@ dependencies depending on your operating system, so be sure to check the We strongly recommend that you install Scrapy in :ref:`a dedicated virtualenv `, to avoid conflicting with your system packages. -For more detailed and platform specifics instructions, read on. +For more detailed and platform specifics instructions, as well as +troubleshooting information, read on. Things that are good to know @@ -247,6 +248,34 @@ that setuptools was unable to pick up one PyPy-specific dependency. To fix this issue, run ``pip install 'PyPyDispatcher>=2.1.0'``. +.. _intro-install-troubleshooting: + +Troubleshooting +=============== + +AttributeError: 'module' object has no attribute 'OP_NO_TLSv1_1' +---------------------------------------------------------------- + +After you install or upgrade Scrapy, Twisted or pyOpenSSL, you may get an +exception with the following traceback:: + + […] + File "[…]/site-packages/twisted/protocols/tls.py", line 63, in + from twisted.internet._sslverify import _setAcceptableProtocols + File "[…]/site-packages/twisted/internet/_sslverify.py", line 38, in + TLSVersion.TLSv1_1: SSL.OP_NO_TLSv1_1, + AttributeError: 'module' object has no attribute 'OP_NO_TLSv1_1' + +The reason you get this exception is that your system or virtual environment +has a version of pyOpenSSL that your version of Twisted does not support. + +To install a version of pyOpenSSL that your version of Twisted supports, +reinstall Twisted with the :code:`tls` extra option:: + + pip install twisted[tls] + +For details, see `Issue #2473 `_. + .. _Python: https://www.python.org/ .. _pip: https://pip.pypa.io/en/latest/installing/ .. _lxml: http://lxml.de/ From 62f3349c1aee54599ab7ee8755d2b31090639105 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Adri=C3=A1n=20Chaves?= Date: Mon, 3 Dec 2018 17:14:10 +0100 Subject: [PATCH 182/889] Document the SCRAPY_PROJECT environment variable Fixes #1109 --- docs/topics/commands.rst | 29 ++++++++++++++++++++++++++++- 1 file changed, 28 insertions(+), 1 deletion(-) diff --git a/docs/topics/commands.rst b/docs/topics/commands.rst index ef9c45196..97f8311de 100644 --- a/docs/topics/commands.rst +++ b/docs/topics/commands.rst @@ -37,7 +37,7 @@ Scrapy also understands, and can be configured through, a number of environment variables. Currently these are: * ``SCRAPY_SETTINGS_MODULE`` (see :ref:`topics-settings-module-envvar`) -* ``SCRAPY_PROJECT`` +* ``SCRAPY_PROJECT`` (see :ref:`topics-project-envvar`) * ``SCRAPY_PYTHON_SHELL`` (see :ref:`topics-shell`) .. _topics-project-structure: @@ -71,6 +71,33 @@ the project settings. Here is an example:: [settings] default = myproject.settings +.. _topics-project-envvar: + +Sharing the root directory between projects +=========================================== + +A project root directory, the one that contains the ``scrapy.cfg``, may be +shared by multiple Scrapy projects, each with its own settings module. + +In that case, you must define one or more aliases for those settings modules +under ``[settings]`` in your ``scrapy.cfg`` file:: + + [settings] + default = myproject1.settings + project1 = myproject1.settings + project2 = myproject2.settings + +By default, the ``scrapy`` command-line tool will use the ``default`` settings. +Use the ``SCRAPY_PROJECT`` environment variable to specify a different project +for ``scrapy`` to use:: + + $ scrapy settings --get BOT_NAME + Project 1 Bot + $ export SCRAPY_PROJECT=project2 + $ scrapy settings --get BOT_NAME + Project 2 Bot + + Using the ``scrapy`` tool ========================= From d7c8eee2fc918d07feb708c41089da21b2b9aea5 Mon Sep 17 00:00:00 2001 From: fpghost Date: Tue, 4 Dec 2018 10:57:51 +0100 Subject: [PATCH 183/889] the strip() isnt needed --- scrapy/downloadermiddlewares/httpproxy.py | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/scrapy/downloadermiddlewares/httpproxy.py b/scrapy/downloadermiddlewares/httpproxy.py index 1dd47359f..2c35d1b90 100644 --- a/scrapy/downloadermiddlewares/httpproxy.py +++ b/scrapy/downloadermiddlewares/httpproxy.py @@ -30,7 +30,7 @@ class HttpProxyMiddleware(object): user_pass = to_bytes( '%s:%s' % (unquote(username), unquote(password)), encoding=self.auth_encoding) - return base64.b64encode(user_pass).strip() + return base64.b64encode(user_pass) def _get_proxy(self, url, orig_type): proxy_type, user, password, hostport = _parse_proxy(url) From cd619c1d4f3810c96af0ff5c5735c1856dfac95a Mon Sep 17 00:00:00 2001 From: kasun Herath Date: Sat, 8 Dec 2018 22:10:45 +0530 Subject: [PATCH 184/889] removed overriden replace method --- scrapy/http/request/json_request.py | 20 +++++------ tests/test_http_request.py | 51 ++++++++--------------------- 2 files changed, 21 insertions(+), 50 deletions(-) diff --git a/scrapy/http/request/json_request.py b/scrapy/http/request/json_request.py index 0fdd2ddf1..03a0ab061 100644 --- a/scrapy/http/request/json_request.py +++ b/scrapy/http/request/json_request.py @@ -12,17 +12,13 @@ from scrapy.http.request import Request class JSONRequest(Request): def __init__(self, *args, **kwargs): - if 'method' not in kwargs: - kwargs['method'] = 'POST' + data = kwargs.pop('data', None) + if data: + kwargs['body'] = json.dumps(data) + + if 'method' not in kwargs: + kwargs['method'] = 'POST' - data = kwargs.pop('data', {}) - kwargs['body'] = json.dumps(data) super(JSONRequest, self).__init__(*args, **kwargs) - self.headers.setdefault(b'Content-Type', b'application/json') - - def replace(self, *args, **kwargs): - """ Create a new Request with the same attributes except for those - given new values. """ - - kwargs.pop('body', None) - return super(JSONRequest, self).replace(*args, **kwargs) + self.headers.setdefault('Content-Type', 'application/json') + self.headers.setdefault('Accept', 'application/json, text/javascript, */*; q=0.01') diff --git a/tests/test_http_request.py b/tests/test_http_request.py index a2021bd65..793a583bc 100644 --- a/tests/test_http_request.py +++ b/tests/test_http_request.py @@ -1150,54 +1150,29 @@ class XmlRpcRequestTest(RequestTest): class JSONRequestTest(RequestTest): request_class = JSONRequest - default_method = 'POST' - default_headers = {b'Content-Type': [b'application/json']} + default_method = 'GET' + default_headers = {b'Content-Type': [b'application/json'], b'Accept': [b'application/json, text/javascript, */*; q=0.01']} - def test_body(self): + def test_data(self): r1 = self.request_class(url="http://www.example.com/") - self.assertEqual(r1.body, b'{}') + self.assertEqual(r1.body, b'') + self.assertEqual(r1.method, 'GET') - r2 = self.request_class(url="http://www.example.com/", body=b"") - self.assertEqual(r2.body, b'{}') + body = b'body' + r2 = self.request_class(url="http://www.example.com/", body=body) + self.assertEqual(r2.body, body) + self.assertEqual(r2.method, 'GET') data = { 'name': 'value', } r3 = self.request_class(url="http://www.example.com/", data=data) self.assertEqual(r3.body, to_bytes(json.dumps(data))) + self.assertEqual(r3.method, 'POST') - r4 = self.request_class(url="http://www.example.com/", body='body1', data=data) - self.assertEqual(r3.body, to_bytes(json.dumps(data))) - - def test_replace(self): - """Test Request.replace() method""" - r1 = self.request_class("http://www.example.com") - hdrs = Headers(r1.headers) - hdrs[b'key'] = b'value' - r2 = r1.replace(body="New body", headers=hdrs) - - # body will not be replaced - self.assertEqual(r1.body, r2.body) - self.assertEqual(r1.url, r2.url) - self.assertEqual((r1.headers, r2.headers), (self.default_headers, hdrs)) - - # Empty attributes (which may fail if not compared properly) - r3 = self.request_class("http://www.example.com", meta={'a': 1}, dont_filter=True) - r4 = r3.replace(url="http://www.example.com/2", meta={}, dont_filter=False) - self.assertEqual(r4.url, "http://www.example.com/2") - self.assertEqual(r4.meta, {}) - assert r4.dont_filter is False - - data1 = { - 'name': 'value1', - } - data2 = { - 'name': 'value2', - } - r5 = self.request_class("http://www.example.com", data=data1) - r6 = r5.replace(url="http://www.example.com/2", data=data2) - self.assertNotEqual(r5.body, r6.body) - self.assertEqual((r5.body, r6.body), (to_bytes(json.dumps(data1)), to_bytes(json.dumps(data2)))) + r4 = self.request_class(url="http://www.example.com/", body=body, data=data) + self.assertEqual(r4.body, to_bytes(json.dumps(data))) + self.assertEqual(r4.method, 'POST') if __name__ == "__main__": From c347acbff6545c428aa2c965cd03f03db6bae1bf Mon Sep 17 00:00:00 2001 From: kasun Herath Date: Sun, 9 Dec 2018 11:27:09 +0530 Subject: [PATCH 185/889] warning if body and data are provided --- scrapy/http/request/json_request.py | 7 ++++++- tests/test_http_request.py | 25 ++++++++++++++++++++++--- 2 files changed, 28 insertions(+), 4 deletions(-) diff --git a/scrapy/http/request/json_request.py b/scrapy/http/request/json_request.py index 03a0ab061..3b791eda3 100644 --- a/scrapy/http/request/json_request.py +++ b/scrapy/http/request/json_request.py @@ -6,14 +6,19 @@ See documentation in docs/topics/request-response.rst """ import json +import warnings from scrapy.http.request import Request class JSONRequest(Request): def __init__(self, *args, **kwargs): + body_passed = 'body' in kwargs data = kwargs.pop('data', None) - if data: + if body_passed and data: + warnings.warn('Both body and data passed. data will be ignored') + + elif not body_passed and data: kwargs['body'] = json.dumps(data) if 'method' not in kwargs: diff --git a/tests/test_http_request.py b/tests/test_http_request.py index 793a583bc..e5a85e6fc 100644 --- a/tests/test_http_request.py +++ b/tests/test_http_request.py @@ -3,6 +3,7 @@ import cgi import unittest import re import json +import warnings import six from six.moves import xmlrpc_client as xmlrpclib @@ -1153,6 +1154,10 @@ class JSONRequestTest(RequestTest): default_method = 'GET' default_headers = {b'Content-Type': [b'application/json'], b'Accept': [b'application/json, text/javascript, */*; q=0.01']} + def setUp(self): + warnings.simplefilter("always") + super(JSONRequestTest, self).setUp() + def test_data(self): r1 = self.request_class(url="http://www.example.com/") self.assertEqual(r1.body, b'') @@ -1170,9 +1175,23 @@ class JSONRequestTest(RequestTest): self.assertEqual(r3.body, to_bytes(json.dumps(data))) self.assertEqual(r3.method, 'POST') - r4 = self.request_class(url="http://www.example.com/", body=body, data=data) - self.assertEqual(r4.body, to_bytes(json.dumps(data))) - self.assertEqual(r4.method, 'POST') + with warnings.catch_warnings(record=True) as _warnings: + r4 = self.request_class(url="http://www.example.com/", body=body, data=data) + self.assertEqual(r4.body, body) + self.assertEqual(r4.method, 'GET') + self.assertEqual(len(_warnings), 1) + self.assertIn('data will be ignored', str(_warnings[0].message)) + + with warnings.catch_warnings(record=True) as _warnings: + r5 = self.request_class(url="http://www.example.com/", body=b'', data=data) + self.assertEqual(r5.body, b'') + self.assertEqual(r5.method, 'GET') + self.assertEqual(len(_warnings), 1) + self.assertIn('data will be ignored', str(_warnings[0].message)) + + def tearDown(self): + warnings.resetwarnings() + super(JSONRequestTest, self).tearDown() if __name__ == "__main__": From 3c981bf204c739fa77e205b9747d2aff446c99d5 Mon Sep 17 00:00:00 2001 From: kasun Herath Date: Sun, 9 Dec 2018 12:56:12 +0530 Subject: [PATCH 186/889] add documentation --- docs/topics/request-response.rst | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) diff --git a/docs/topics/request-response.rst b/docs/topics/request-response.rst index e29914dbf..d957915e7 100644 --- a/docs/topics/request-response.rst +++ b/docs/topics/request-response.rst @@ -508,6 +508,38 @@ method for this job. Here's an example spider which uses it:: # continue scraping with authenticated session... +JSONRequest +----------- + +The JSONRequest class extends the base :class:`Request` class with functionality for +dealing with JSON requests. + +.. class:: JSONRequest(url, [data, ...]) + + The :class:`JSONRequest` class adds a new argument to the constructor called data. The + remaining arguments are the same as for the :class:`Request` class and are + not documented here. + + Using the :class:`JSONRequest` will set the `Content-Type` header to `application/json` + and `Accept` header to `application/json, text/javascript, */*; q=0.01` + + :param data: is any JSON serializable object that needs to be JSON encoded and assigned to body. + if :attr:`Request.body` argument is provided this parameter will be ignored. + if :attr:`Request.body` argument is not provided and data argument is provided :attr:`Request.method` will be + set to POST automatically. + :type data: JSON serializable object + +JSONRequest usage example +------------------------- + +Sending a JSON POST request with a JSON payload:: + + data = { + 'name1': 'value1', + 'name2': 'value2', + } + yield JSONRequest(url='http://www.example.com/post/action', data=data) + Response objects ================ From 4d48759978ac2405bc2cb30f84af948693e4cad3 Mon Sep 17 00:00:00 2001 From: Lucy Wang Date: Mon, 10 Dec 2018 14:44:15 +0800 Subject: [PATCH 187/889] remove "sudo: false" now that travis no longer supports it https://changelog.travis-ci.com/deprecation-container-based-linux-build-environment-82037 --- .travis.yml | 1 - 1 file changed, 1 deletion(-) diff --git a/.travis.yml b/.travis.yml index 4218d13bf..08b0bf119 100644 --- a/.travis.yml +++ b/.travis.yml @@ -1,5 +1,4 @@ language: python -sudo: false branches: only: - master From ecda69130e97629b15d3b09b1e588cb6777ee94d Mon Sep 17 00:00:00 2001 From: kasun Herath Date: Mon, 10 Dec 2018 22:34:49 +0530 Subject: [PATCH 188/889] allow to send empty data values and docs changes --- docs/topics/request-response.rst | 6 +++--- scrapy/http/request/json_request.py | 8 +++++--- tests/test_http_request.py | 27 +++++++++++++++++++++------ 3 files changed, 29 insertions(+), 12 deletions(-) diff --git a/docs/topics/request-response.rst b/docs/topics/request-response.rst index d957915e7..02b853fc0 100644 --- a/docs/topics/request-response.rst +++ b/docs/topics/request-response.rst @@ -520,13 +520,13 @@ dealing with JSON requests. remaining arguments are the same as for the :class:`Request` class and are not documented here. - Using the :class:`JSONRequest` will set the `Content-Type` header to `application/json` - and `Accept` header to `application/json, text/javascript, */*; q=0.01` + Using the :class:`JSONRequest` will set the ``Content-Type`` header to ``application/json`` + and ``Accept`` header to ``application/json, text/javascript, */*; q=0.01`` :param data: is any JSON serializable object that needs to be JSON encoded and assigned to body. if :attr:`Request.body` argument is provided this parameter will be ignored. if :attr:`Request.body` argument is not provided and data argument is provided :attr:`Request.method` will be - set to POST automatically. + set to ``'POST'`` automatically. :type data: JSON serializable object JSONRequest usage example diff --git a/scrapy/http/request/json_request.py b/scrapy/http/request/json_request.py index 3b791eda3..593dfdcb0 100644 --- a/scrapy/http/request/json_request.py +++ b/scrapy/http/request/json_request.py @@ -13,12 +13,14 @@ from scrapy.http.request import Request class JSONRequest(Request): def __init__(self, *args, **kwargs): - body_passed = 'body' in kwargs + body_passed = kwargs.get('body', None) is not None data = kwargs.pop('data', None) - if body_passed and data: + data_passed = data is not None + + if body_passed and data_passed: warnings.warn('Both body and data passed. data will be ignored') - elif not body_passed and data: + elif not body_passed and data_passed: kwargs['body'] = json.dumps(data) if 'method' not in kwargs: diff --git a/tests/test_http_request.py b/tests/test_http_request.py index e5a85e6fc..5eb655c12 100644 --- a/tests/test_http_request.py +++ b/tests/test_http_request.py @@ -1175,20 +1175,35 @@ class JSONRequestTest(RequestTest): self.assertEqual(r3.body, to_bytes(json.dumps(data))) self.assertEqual(r3.method, 'POST') + r4 = self.request_class(url="http://www.example.com/", data=[]) + self.assertEqual(r4.body, to_bytes(json.dumps([]))) + self.assertEqual(r4.method, 'POST') + with warnings.catch_warnings(record=True) as _warnings: - r4 = self.request_class(url="http://www.example.com/", body=body, data=data) - self.assertEqual(r4.body, body) - self.assertEqual(r4.method, 'GET') + r5 = self.request_class(url="http://www.example.com/", body=body, data=data) + self.assertEqual(r5.body, body) + self.assertEqual(r5.method, 'GET') self.assertEqual(len(_warnings), 1) self.assertIn('data will be ignored', str(_warnings[0].message)) with warnings.catch_warnings(record=True) as _warnings: - r5 = self.request_class(url="http://www.example.com/", body=b'', data=data) - self.assertEqual(r5.body, b'') - self.assertEqual(r5.method, 'GET') + r6 = self.request_class(url="http://www.example.com/", body=b'', data=data) + self.assertEqual(r6.body, b'') + self.assertEqual(r6.method, 'GET') self.assertEqual(len(_warnings), 1) self.assertIn('data will be ignored', str(_warnings[0].message)) + with warnings.catch_warnings(record=True) as _warnings: + r7 = self.request_class(url="http://www.example.com/", body=None, data=data) + self.assertEqual(r7.body, to_bytes(json.dumps(data))) + self.assertEqual(r7.method, 'POST') + self.assertEqual(len(_warnings), 0) + + with warnings.catch_warnings(record=True) as _warnings: + r8 = self.request_class(url="http://www.example.com/", body=None, data=None) + self.assertEqual(r8.method, 'GET') + self.assertEqual(len(_warnings), 0) + def tearDown(self): warnings.resetwarnings() super(JSONRequestTest, self).tearDown() From cd9d8e28cdf49ff63e1b3f9126e6651fcd77e0fa Mon Sep 17 00:00:00 2001 From: hsiao yi Date: Tue, 11 Dec 2018 19:21:07 +0800 Subject: [PATCH 189/889] unify the quote style --- docs/intro/overview.rst | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/docs/intro/overview.rst b/docs/intro/overview.rst index 9d7c94d39..8b2fef065 100644 --- a/docs/intro/overview.rst +++ b/docs/intro/overview.rst @@ -26,7 +26,7 @@ http://quotes.toscrape.com, following the pagination:: class QuotesSpider(scrapy.Spider): - name = "quotes" + name = 'quotes' start_urls = [ 'http://quotes.toscrape.com/tag/humor/', ] From 71ef321b68d2fd202de145d0c580387ee59cd2e2 Mon Sep 17 00:00:00 2001 From: kasun Herath Date: Wed, 12 Dec 2018 11:12:48 +0530 Subject: [PATCH 190/889] sort_keys while serializing to json --- scrapy/http/request/json_request.py | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/scrapy/http/request/json_request.py b/scrapy/http/request/json_request.py index 593dfdcb0..afc4356a3 100644 --- a/scrapy/http/request/json_request.py +++ b/scrapy/http/request/json_request.py @@ -21,7 +21,7 @@ class JSONRequest(Request): warnings.warn('Both body and data passed. data will be ignored') elif not body_passed and data_passed: - kwargs['body'] = json.dumps(data) + kwargs['body'] = json.dumps(data, sort_keys=True) if 'method' not in kwargs: kwargs['method'] = 'POST' From 8f1507a4a5de2ed55cb0fda198265845a047fedb Mon Sep 17 00:00:00 2001 From: kasun Herath Date: Mon, 17 Dec 2018 23:14:06 +0530 Subject: [PATCH 191/889] dumps_kwargs --- docs/topics/request-response.rst | 10 ++- scrapy/http/request/json_request.py | 21 ++++- tests/test_http_request.py | 114 +++++++++++++++++++++++++++- 3 files changed, 138 insertions(+), 7 deletions(-) diff --git a/docs/topics/request-response.rst b/docs/topics/request-response.rst index 02b853fc0..4e6f00bb0 100644 --- a/docs/topics/request-response.rst +++ b/docs/topics/request-response.rst @@ -514,9 +514,9 @@ JSONRequest The JSONRequest class extends the base :class:`Request` class with functionality for dealing with JSON requests. -.. class:: JSONRequest(url, [data, ...]) +.. class:: JSONRequest(url, [... data]) - The :class:`JSONRequest` class adds a new argument to the constructor called data. The + The :class:`JSONRequest` class adds two new argument to the constructor. The remaining arguments are the same as for the :class:`Request` class and are not documented here. @@ -529,6 +529,12 @@ dealing with JSON requests. set to ``'POST'`` automatically. :type data: JSON serializable object + :param dumps_kwargs: Parameters that will be passed to underlying `json.dumps`_ method which is used to serialize data + into JSON format. + :type dumps_kwargs: dict + +.. _json.dumps: https://docs.python.org/3/library/json.html#json.dumps + JSONRequest usage example ------------------------- diff --git a/scrapy/http/request/json_request.py b/scrapy/http/request/json_request.py index afc4356a3..7499610b9 100644 --- a/scrapy/http/request/json_request.py +++ b/scrapy/http/request/json_request.py @@ -13,6 +13,7 @@ from scrapy.http.request import Request class JSONRequest(Request): def __init__(self, *args, **kwargs): + dumps_kwargs = kwargs.pop('dumps_kwargs', {}) body_passed = kwargs.get('body', None) is not None data = kwargs.pop('data', None) data_passed = data is not None @@ -21,7 +22,7 @@ class JSONRequest(Request): warnings.warn('Both body and data passed. data will be ignored') elif not body_passed and data_passed: - kwargs['body'] = json.dumps(data, sort_keys=True) + kwargs['body'] = self.dump(data, **dumps_kwargs) if 'method' not in kwargs: kwargs['method'] = 'POST' @@ -29,3 +30,21 @@ class JSONRequest(Request): super(JSONRequest, self).__init__(*args, **kwargs) self.headers.setdefault('Content-Type', 'application/json') self.headers.setdefault('Accept', 'application/json, text/javascript, */*; q=0.01') + self._dumps_kwargs = dumps_kwargs + + def replace(self, *args, **kwargs): + body_passed = kwargs.get('body', None) is not None + data = kwargs.pop('data', None) + data_passed = data is not None + + if body_passed and data_passed: + warnings.warn('Both body and data passed. data will be ignored') + + elif not body_passed and data_passed: + kwargs['body'] = self.dump(data, **self._dumps_kwargs) + + return super(JSONRequest, self).replace(*args, **kwargs) + + def dump(self, data, **kwargs): + """Convert to JSON """ + return json.dumps(data, sort_keys=True, **kwargs) diff --git a/tests/test_http_request.py b/tests/test_http_request.py index 5eb655c12..6dcfa25da 100644 --- a/tests/test_http_request.py +++ b/tests/test_http_request.py @@ -14,6 +14,8 @@ if six.PY3: from scrapy.http import Request, FormRequest, XmlRpcRequest, JSONRequest, Headers, HtmlResponse from scrapy.utils.python import to_bytes, to_native_str +from tests import mock + class RequestTest(unittest.TestCase): @@ -1161,24 +1163,49 @@ class JSONRequestTest(RequestTest): def test_data(self): r1 = self.request_class(url="http://www.example.com/") self.assertEqual(r1.body, b'') - self.assertEqual(r1.method, 'GET') body = b'body' r2 = self.request_class(url="http://www.example.com/", body=body) self.assertEqual(r2.body, body) - self.assertEqual(r2.method, 'GET') data = { 'name': 'value', } r3 = self.request_class(url="http://www.example.com/", data=data) self.assertEqual(r3.body, to_bytes(json.dumps(data))) - self.assertEqual(r3.method, 'POST') + # empty data r4 = self.request_class(url="http://www.example.com/", data=[]) self.assertEqual(r4.body, to_bytes(json.dumps([]))) - self.assertEqual(r4.method, 'POST') + def test_data_method(self): + # data is not passed + r1 = self.request_class(url="http://www.example.com/") + self.assertEqual(r1.method, 'GET') + + body = b'body' + r2 = self.request_class(url="http://www.example.com/", body=body) + self.assertEqual(r2.method, 'GET') + + data = { + 'name': 'value', + } + r3 = self.request_class(url="http://www.example.com/", data=data) + self.assertEqual(r3.method, 'POST') + + # method passed explicitly + r4 = self.request_class(url="http://www.example.com/", data=data, method='GET') + self.assertEqual(r4.method, 'GET') + + r5 = self.request_class(url="http://www.example.com/", data=[]) + self.assertEqual(r5.method, 'POST') + + def test_body_data(self): + """ passing both body and data should result a warning """ + body = b'body' + data = { + 'name': 'value', + } with warnings.catch_warnings(record=True) as _warnings: r5 = self.request_class(url="http://www.example.com/", body=body, data=data) self.assertEqual(r5.body, body) @@ -1186,6 +1213,11 @@ class JSONRequestTest(RequestTest): self.assertEqual(len(_warnings), 1) self.assertIn('data will be ignored', str(_warnings[0].message)) + def test_empty_body_data(self): + """ passing any body value and data should result a warning """ + data = { + 'name': 'value', + } with warnings.catch_warnings(record=True) as _warnings: r6 = self.request_class(url="http://www.example.com/", body=b'', data=data) self.assertEqual(r6.body, b'') @@ -1193,17 +1225,91 @@ class JSONRequestTest(RequestTest): self.assertEqual(len(_warnings), 1) self.assertIn('data will be ignored', str(_warnings[0].message)) + def test_body_none_data(self): + data = { + 'name': 'value', + } with warnings.catch_warnings(record=True) as _warnings: r7 = self.request_class(url="http://www.example.com/", body=None, data=data) self.assertEqual(r7.body, to_bytes(json.dumps(data))) self.assertEqual(r7.method, 'POST') self.assertEqual(len(_warnings), 0) + def test_body_data_none(self): with warnings.catch_warnings(record=True) as _warnings: r8 = self.request_class(url="http://www.example.com/", body=None, data=None) self.assertEqual(r8.method, 'GET') self.assertEqual(len(_warnings), 0) + def test_dumps_sort_keys(self): + """ Test that sort_keys=True is passed to json.dumps by default """ + data = { + 'name': 'value', + } + with mock.patch('json.dumps', return_value=b'') as mock_dumps: + self.request_class(url="http://www.example.com/", data=data) + kwargs = mock_dumps.call_args[1] + self.assertEqual(kwargs['sort_keys'], True) + + def test_dumps_kwargs(self): + """ Test that dumps_kwargs are passed to json.dumps """ + data = { + 'name': 'value', + } + dumps_kwargs = { + 'ensure_ascii': True, + 'allow_nan': True, + } + with mock.patch('json.dumps', return_value=b'') as mock_dumps: + self.request_class(url="http://www.example.com/", data=data, dumps_kwargs=dumps_kwargs) + kwargs = mock_dumps.call_args[1] + self.assertEqual(kwargs['ensure_ascii'], True) + self.assertEqual(kwargs['allow_nan'], True) + + def test_replace_data(self): + data1 = { + 'name1': 'value1', + } + data2 = { + 'name2': 'value2', + } + r1 = self.request_class(url="http://www.example.com/", data=data1) + r2 = r1.replace(data=data2) + self.assertEqual(r2.body, to_bytes(json.dumps(data2))) + + def test_replace_sort_keys(self): + """ Test that replace provides sort_keys=True to json.dumps """ + data1 = { + 'name1': 'value1', + } + data2 = { + 'name2': 'value2', + } + r1 = self.request_class(url="http://www.example.com/", data=data1) + with mock.patch('json.dumps', return_value=b'') as mock_dumps: + r1.replace(data=data2) + kwargs = mock_dumps.call_args[1] + self.assertEqual(kwargs['sort_keys'], True) + + def test_replace_dumps_kwargs(self): + """ Test that dumps_kwargs are provided json.dumps when replace is called """ + data1 = { + 'name1': 'value1', + } + data2 = { + 'name2': 'value2', + } + dumps_kwargs = { + 'ensure_ascii': True, + 'allow_nan': True, + } + r1 = self.request_class(url="http://www.example.com/", data=data1, dumps_kwargs=dumps_kwargs) + with mock.patch('json.dumps', return_value=b'') as mock_dumps: + r1.replace(data=data2) + kwargs = mock_dumps.call_args[1] + self.assertEqual(kwargs['ensure_ascii'], True) + self.assertEqual(kwargs['allow_nan'], True) + def tearDown(self): warnings.resetwarnings() super(JSONRequestTest, self).tearDown() From 12ad06b7ac57dd022a4add16259ee8fd64d5ede2 Mon Sep 17 00:00:00 2001 From: kasun Herath Date: Mon, 17 Dec 2018 23:17:13 +0530 Subject: [PATCH 192/889] docs change --- docs/topics/request-response.rst | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/docs/topics/request-response.rst b/docs/topics/request-response.rst index 4e6f00bb0..6758269b1 100644 --- a/docs/topics/request-response.rst +++ b/docs/topics/request-response.rst @@ -529,8 +529,8 @@ dealing with JSON requests. set to ``'POST'`` automatically. :type data: JSON serializable object - :param dumps_kwargs: Parameters that will be passed to underlying `json.dumps`_ method which is used to serialize data - into JSON format. + :param dumps_kwargs: Parameters that will be passed to underlying `json.dumps`_ method which is used to serialize + data into JSON format. :type dumps_kwargs: dict .. _json.dumps: https://docs.python.org/3/library/json.html#json.dumps From 24acc50d1894b6566e427f1dfea14e2aa647077e Mon Sep 17 00:00:00 2001 From: kasun Herath Date: Tue, 18 Dec 2018 23:16:14 +0530 Subject: [PATCH 193/889] dumps_kwargs parameter in docs --- docs/topics/request-response.rst | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/docs/topics/request-response.rst b/docs/topics/request-response.rst index 6758269b1..37b73edd1 100644 --- a/docs/topics/request-response.rst +++ b/docs/topics/request-response.rst @@ -514,7 +514,7 @@ JSONRequest The JSONRequest class extends the base :class:`Request` class with functionality for dealing with JSON requests. -.. class:: JSONRequest(url, [... data]) +.. class:: JSONRequest(url, [... data, dumps_kwargs]) The :class:`JSONRequest` class adds two new argument to the constructor. The remaining arguments are the same as for the :class:`Request` class and are From f6dfc5f3dd56b7c823e3f53f7f9f63515ca7c3e2 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Daniel=20Gra=C3=B1a?= Date: Thu, 20 Dec 2018 19:23:23 -0300 Subject: [PATCH 194/889] Fix boto import error under Jessie testing environment --- .travis.yml | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/.travis.yml b/.travis.yml index 4218d13bf..252c783d7 100644 --- a/.travis.yml +++ b/.travis.yml @@ -43,6 +43,11 @@ install: virtualenv --python="$PYPY_VERSION/bin/pypy3" "$HOME/virtualenvs/$PYPY_VERSION" source "$HOME/virtualenvs/$PYPY_VERSION/bin/activate" fi + if [ "$TOXENV" = "jessie" ]; then + # Not used directly but allows boto GCE plugins to load. + # https://github.com/GoogleCloudPlatform/compute-image-packages/issues/262 + pip install google-compute-engine + fi - pip install -U tox twine wheel codecov script: tox From 8ed6beb7f9199e8924cd03bd34a46194c3d82e32 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Daniel=20Gra=C3=B1a?= Date: Thu, 20 Dec 2018 19:39:29 -0300 Subject: [PATCH 195/889] Needs to be installed within tox env --- .travis.yml | 5 ----- tox.ini | 3 +++ 2 files changed, 3 insertions(+), 5 deletions(-) diff --git a/.travis.yml b/.travis.yml index 252c783d7..4218d13bf 100644 --- a/.travis.yml +++ b/.travis.yml @@ -43,11 +43,6 @@ install: virtualenv --python="$PYPY_VERSION/bin/pypy3" "$HOME/virtualenvs/$PYPY_VERSION" source "$HOME/virtualenvs/$PYPY_VERSION/bin/activate" fi - if [ "$TOXENV" = "jessie" ]; then - # Not used directly but allows boto GCE plugins to load. - # https://github.com/GoogleCloudPlatform/compute-image-packages/issues/262 - pip install google-compute-engine - fi - pip install -U tox twine wheel codecov script: tox diff --git a/tox.ini b/tox.ini index e5543fe2a..0c0f8f7b7 100644 --- a/tox.ini +++ b/tox.ini @@ -51,6 +51,9 @@ deps = cssselect==0.9.1 zope.interface==4.1.1 -rtests/requirements-py2.txt +# Not used directly but allows boto GCE plugins to load. +# https://github.com/GoogleCloudPlatform/compute-image-packages/issues/262 + google-compute-engine==2.8.12 [testenv:trunk] basepython = python2.7 From f85c915872cf70bb87a05cecd6ef5a6534d2c4ed Mon Sep 17 00:00:00 2001 From: Joaquin Garmendia Cabrera Date: Sun, 23 Dec 2018 00:26:58 -0500 Subject: [PATCH 196/889] Update item-pipeline example --- docs/topics/item-pipeline.rst | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/docs/topics/item-pipeline.rst b/docs/topics/item-pipeline.rst index 38265b474..1c2c51e05 100644 --- a/docs/topics/item-pipeline.rst +++ b/docs/topics/item-pipeline.rst @@ -87,8 +87,8 @@ contain a price:: vat_factor = 1.15 def process_item(self, item, spider): - if item['price']: - if item['price_excludes_vat']: + if 'price' in item and item['price']: + if 'price_excludes_vat' in item and item['price_excludes_vat']: item['price'] = item['price'] * self.vat_factor return item else: From 7c26701012c8e41a3e2c2644e05ce852d7472bc3 Mon Sep 17 00:00:00 2001 From: Mikhail Korobov Date: Wed, 26 Dec 2018 01:33:58 +0500 Subject: [PATCH 197/889] DOC warn about telnet console being insecure --- docs/topics/telnetconsole.rst | 18 +++++++++++++++++- 1 file changed, 17 insertions(+), 1 deletion(-) diff --git a/docs/topics/telnetconsole.rst b/docs/topics/telnetconsole.rst index 4db9cafb2..bf2ffa443 100644 --- a/docs/topics/telnetconsole.rst +++ b/docs/topics/telnetconsole.rst @@ -16,6 +16,17 @@ The telnet console is a :ref:`built-in Scrapy extension disable it if you want. For more information about the extension itself see :ref:`topics-extensions-ref-telnetconsole`. +.. warning:: + It is not secure to use telnet console via public networks, as telnet + doesn't provide any transport-layer security. Having username/password + authentication doesn't change that. + + Intended usage is connecting to a running Scrapy spider locally + (spider process and telnet client are on the same machine) + or over a secure connection (VPN, SSH tunnel). + Please avoid using telnet console over insecure connections, + or disable it completely using :setting:`TELNETCONSOLE_ENABLED` option. + .. highlight:: none How to access the telnet console @@ -39,7 +50,12 @@ autogenerated Password can be seen on scrapy logs like the example bellow:: 2018-10-16 14:35:21 [scrapy.extensions.telnet] INFO: Telnet Password: 16f92501e8a59326 Default Username and Password can be overriden by the settings -:setting:`TELNETCONSOLE_USERNAME` and :setting:`TELNETCONSOLE_PASSWORD` +:setting:`TELNETCONSOLE_USERNAME` and :setting:`TELNETCONSOLE_PASSWORD`. + +.. warning:: + Username and password provide only a limited protection, as telnet + is not using secure transport - by default traffic is not encrypted + even if username and password are set. You need the telnet program which comes installed by default in Windows, and most Linux distros. From cdd04dfb1d9a2e6fd8c188dccae26bbdd3454ebd Mon Sep 17 00:00:00 2001 From: Mikhail Korobov Date: Wed, 26 Dec 2018 13:13:49 +0500 Subject: [PATCH 198/889] declare Python 3.7 support in setup.py --- setup.py | 1 + 1 file changed, 1 insertion(+) diff --git a/setup.py b/setup.py index 8c47f67ce..bd666e93c 100644 --- a/setup.py +++ b/setup.py @@ -56,6 +56,7 @@ setup( 'Programming Language :: Python :: 3.4', 'Programming Language :: Python :: 3.5', 'Programming Language :: Python :: 3.6', + 'Programming Language :: Python :: 3.7', 'Programming Language :: Python :: Implementation :: CPython', 'Programming Language :: Python :: Implementation :: PyPy', 'Topic :: Internet :: WWW/HTTP', From 71e47629b1cb65a61d8e4809177817c1a833f73c Mon Sep 17 00:00:00 2001 From: Mikhail Korobov Date: Wed, 26 Dec 2018 16:35:05 +0500 Subject: [PATCH 199/889] DOC fix docs for AWS_... settings. A follow-up to GH-2609. --- docs/topics/settings.rst | 29 +++++++++++++++++++++-------- 1 file changed, 21 insertions(+), 8 deletions(-) diff --git a/docs/topics/settings.rst b/docs/topics/settings.rst index 47b6cf13d..0ac26a9bd 100644 --- a/docs/topics/settings.rst +++ b/docs/topics/settings.rst @@ -178,35 +178,48 @@ Default: ``None`` The AWS secret key used by code that requires access to `Amazon Web services`_, such as the :ref:`S3 feed storage backend `. -.. setting:: BOT_NAME +.. setting:: AWS_ENDPOINT_URL AWS_ENDPOINT_URL ---------------- Default: ``None`` -Endpoint URL used for S3-like self-hosted storage. Storage like Minio or s3.scality. +Endpoint URL used for S3-like storage, for example Minio or s3.scality. +Only supported with ``botocore`` library. -.. setting:: AWS_ENDPOINT_URL +.. setting:: AWS_USE_SSL AWS_USE_SSL ----------- Default: ``None`` -Use this option if you want to disable SSL connection for communication with S3 or S3-like storage. -By default SSL will be used. +Use this option if you want to disable SSL connection for communication with +S3 or S3-like storage. By default SSL will be used. +Only supported with ``botocore`` library. -.. setting:: AWS_USE_SSL +.. setting:: AWS_VERIFY AWS_VERIFY ---------- Default: ``None`` -Verify SSL connection between Scrapy and S3 or S3-like storage. By default SSL verification will occur. +Verify SSL connection between Scrapy and S3 or S3-like storage. By default +SSL verification will occur. Only supported with ``botocore`` library. -.. setting:: AWS_VERIFY +.. setting:: AWS_REGION_NAME + +AWS_REGION_NAME +--------------- + +Default: ``None`` + +The name of the region associated with the AWS client. +Only supported with ``botocore`` library. + +.. setting:: BOT_NAME BOT_NAME -------- From a5e1b7bb4724bafa26b476a87a9f12b4d6479661 Mon Sep 17 00:00:00 2001 From: Victor Torres Date: Thu, 29 Nov 2018 18:19:14 -0300 Subject: [PATCH 200/889] add sitemap_filter attribute to SitemapSpider class it makes it possible to filter sitemap urls by any available attribute for example, you can filter urls with lastmod greater than a given datetime it can be helpful when the url loc itself does not aggregate that information --- docs/topics/spiders.rst | 26 ++++++++++++++++++++++++++ scrapy/spiders/sitemap.py | 10 ++++++++-- 2 files changed, 34 insertions(+), 2 deletions(-) diff --git a/docs/topics/spiders.rst b/docs/topics/spiders.rst index a08dc30f2..b0b9e0483 100644 --- a/docs/topics/spiders.rst +++ b/docs/topics/spiders.rst @@ -680,6 +680,32 @@ SitemapSpider Default is ``sitemap_alternate_links`` disabled. + .. attribute:: sitemap_filter + + Specifies a function to filter sitemap entries and their attributes. + + For example:: + + + http://example.com/ + 2005-01-01 + + + We can define a ``sitemap_filter`` function to filter ``urls`` by date:: + + def sitemap_filter(urls): + from datetime import datetime + for url in urls: + date_time = datetime.strptime(url['lastmod'], '%Y-%m-%d') + if date_time.year >= 2005: + yield url + + This would retrieve only ``urls`` modified on 2005 and the following + years. + + If you omit this attribute, all urls found in sitemaps will be + processed, observing other attributes and their settings. + SitemapSpider examples ~~~~~~~~~~~~~~~~~~~~~~ diff --git a/scrapy/spiders/sitemap.py b/scrapy/spiders/sitemap.py index 0ee8ba5e7..907aba243 100644 --- a/scrapy/spiders/sitemap.py +++ b/scrapy/spiders/sitemap.py @@ -17,6 +17,7 @@ class SitemapSpider(Spider): sitemap_rules = [('', 'parse')] sitemap_follow = [''] sitemap_alternate_links = False + sitemap_filter = None def __init__(self, *a, **kw): super(SitemapSpider, self).__init__(*a, **kw) @@ -43,12 +44,17 @@ class SitemapSpider(Spider): return s = Sitemap(body) + if callable(self.sitemap_filter): + it = self.sitemap_filter(s) + else: + it = s + if s.type == 'sitemapindex': - for loc in iterloc(s, self.sitemap_alternate_links): + for loc in iterloc(it, self.sitemap_alternate_links): if any(x.search(loc) for x in self._follow): yield Request(loc, callback=self._parse_sitemap) elif s.type == 'urlset': - for loc in iterloc(s, self.sitemap_alternate_links): + for loc in iterloc(it, self.sitemap_alternate_links): for r, c in self._cbs: if r.search(loc): yield Request(loc, callback=c) From 672385a371453c84faa2f31425e3701b25260629 Mon Sep 17 00:00:00 2001 From: Victor Torres Date: Thu, 29 Nov 2018 18:33:20 -0300 Subject: [PATCH 201/889] using a method definition instead of a None attribute --- docs/topics/spiders.rst | 4 ++-- scrapy/spiders/sitemap.py | 14 +++++++++----- 2 files changed, 11 insertions(+), 7 deletions(-) diff --git a/docs/topics/spiders.rst b/docs/topics/spiders.rst index b0b9e0483..127c8d03e 100644 --- a/docs/topics/spiders.rst +++ b/docs/topics/spiders.rst @@ -680,7 +680,7 @@ SitemapSpider Default is ``sitemap_alternate_links`` disabled. - .. attribute:: sitemap_filter + .. method:: sitemap_filter(urls) Specifies a function to filter sitemap entries and their attributes. @@ -703,7 +703,7 @@ SitemapSpider This would retrieve only ``urls`` modified on 2005 and the following years. - If you omit this attribute, all urls found in sitemaps will be + If you omit this method, all urls found in sitemaps will be processed, observing other attributes and their settings. diff --git a/scrapy/spiders/sitemap.py b/scrapy/spiders/sitemap.py index 907aba243..c86e986db 100644 --- a/scrapy/spiders/sitemap.py +++ b/scrapy/spiders/sitemap.py @@ -17,7 +17,6 @@ class SitemapSpider(Spider): sitemap_rules = [('', 'parse')] sitemap_follow = [''] sitemap_alternate_links = False - sitemap_filter = None def __init__(self, *a, **kw): super(SitemapSpider, self).__init__(*a, **kw) @@ -32,6 +31,14 @@ class SitemapSpider(Spider): for url in self.sitemap_urls: yield Request(url, self._parse_sitemap) + def sitemap_filter(self, urls): + """This method can be used to filter sitemap entries by their + attributes, for example, you can filter locs with lastmod greater + than a given date (see docs). + """ + for url in urls: + yield url + def _parse_sitemap(self, response): if response.url.endswith('/robots.txt'): for url in sitemap_urls_from_robots(response.text, base_url=response.url): @@ -44,10 +51,7 @@ class SitemapSpider(Spider): return s = Sitemap(body) - if callable(self.sitemap_filter): - it = self.sitemap_filter(s) - else: - it = s + it = self.sitemap_filter(s) if s.type == 'sitemapindex': for loc in iterloc(it, self.sitemap_alternate_links): From d7d5917ff12ecb8db7cd04592f7cc18b0ab1a996 Mon Sep 17 00:00:00 2001 From: Victor Torres Date: Fri, 30 Nov 2018 11:20:12 -0300 Subject: [PATCH 202/889] add tests for the sitemap_filter method in the SitemapSpider class --- tests/test_spider.py | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) diff --git a/tests/test_spider.py b/tests/test_spider.py index f26da2334..871852ab2 100644 --- a/tests/test_spider.py +++ b/tests/test_spider.py @@ -375,6 +375,38 @@ Sitemap: /sitemap-relative-url.xml 'http://www.example.com/schweiz-deutsch/', 'http://www.example.com/italiano/']) + def test_sitemap_filter(self): + sitemap = b""" + + + http://www.example.com/english/ + 2010-01-01 + + + http://www.example.com/portuguese/ + 2005-01-01 + + """ + + class FilteredSitemapSpider(self.spider_class): + def sitemap_filter(self, urls): + from datetime import datetime + for url in urls: + date_time = datetime.strptime(url['lastmod'], '%Y-%m-%d') + if date_time.year > 2008: + yield url + + r = TextResponse(url="http://www.example.com/sitemap.xml", body=sitemap) + spider = self.spider_class("example.com") + self.assertEqual([req.url for req in spider._parse_sitemap(r)], + ['http://www.example.com/english/', + 'http://www.example.com/portuguese/']) + + spider = FilteredSitemapSpider("example.com") + self.assertEqual([req.url for req in spider._parse_sitemap(r)], + ['http://www.example.com/english/']) + class DeprecationTest(unittest.TestCase): From 657f0663b3cb97ca1c1a498c066de444bd30fa82 Mon Sep 17 00:00:00 2001 From: Victor Torres Date: Thu, 20 Dec 2018 13:35:52 -0300 Subject: [PATCH 203/889] rename param from urls to entries --- docs/topics/spiders.rst | 16 ++++++++-------- scrapy/spiders/sitemap.py | 6 +++--- tests/test_spider.py | 8 ++++---- 3 files changed, 15 insertions(+), 15 deletions(-) diff --git a/docs/topics/spiders.rst b/docs/topics/spiders.rst index 127c8d03e..918f1cc36 100644 --- a/docs/topics/spiders.rst +++ b/docs/topics/spiders.rst @@ -680,7 +680,7 @@ SitemapSpider Default is ``sitemap_alternate_links`` disabled. - .. method:: sitemap_filter(urls) + .. method:: sitemap_filter(entries) Specifies a function to filter sitemap entries and their attributes. @@ -691,19 +691,19 @@ SitemapSpider 2005-01-01 - We can define a ``sitemap_filter`` function to filter ``urls`` by date:: + We can define a ``sitemap_filter`` function to filter ``entries`` by date:: - def sitemap_filter(urls): + def sitemap_filter(entries): from datetime import datetime - for url in urls: - date_time = datetime.strptime(url['lastmod'], '%Y-%m-%d') + for entry in entries: + date_time = datetime.strptime(entry['lastmod'], '%Y-%m-%d') if date_time.year >= 2005: - yield url + yield entry - This would retrieve only ``urls`` modified on 2005 and the following + This would retrieve only ``entries`` modified on 2005 and the following years. - If you omit this method, all urls found in sitemaps will be + If you omit this method, all entries found in sitemaps will be processed, observing other attributes and their settings. diff --git a/scrapy/spiders/sitemap.py b/scrapy/spiders/sitemap.py index c86e986db..534c45c70 100644 --- a/scrapy/spiders/sitemap.py +++ b/scrapy/spiders/sitemap.py @@ -31,13 +31,13 @@ class SitemapSpider(Spider): for url in self.sitemap_urls: yield Request(url, self._parse_sitemap) - def sitemap_filter(self, urls): + def sitemap_filter(self, entries): """This method can be used to filter sitemap entries by their attributes, for example, you can filter locs with lastmod greater than a given date (see docs). """ - for url in urls: - yield url + for entry in entries: + yield entry def _parse_sitemap(self, response): if response.url.endswith('/robots.txt'): diff --git a/tests/test_spider.py b/tests/test_spider.py index 871852ab2..d5d10c9ea 100644 --- a/tests/test_spider.py +++ b/tests/test_spider.py @@ -390,12 +390,12 @@ Sitemap: /sitemap-relative-url.xml """ class FilteredSitemapSpider(self.spider_class): - def sitemap_filter(self, urls): + def sitemap_filter(self, entries): from datetime import datetime - for url in urls: - date_time = datetime.strptime(url['lastmod'], '%Y-%m-%d') + for entry in entries: + date_time = datetime.strptime(entry['lastmod'], '%Y-%m-%d') if date_time.year > 2008: - yield url + yield entry r = TextResponse(url="http://www.example.com/sitemap.xml", body=sitemap) spider = self.spider_class("example.com") From 5e7ecf9dc1954060fd0445dce5fb54e020dd3e59 Mon Sep 17 00:00:00 2001 From: Victor Torres Date: Fri, 21 Dec 2018 17:31:52 -0300 Subject: [PATCH 204/889] add tests for sitemapindex --- tests/test_spider.py | 31 +++++++++++++++++++++++++++++++ 1 file changed, 31 insertions(+) diff --git a/tests/test_spider.py b/tests/test_spider.py index d5d10c9ea..8b56cfec1 100644 --- a/tests/test_spider.py +++ b/tests/test_spider.py @@ -407,6 +407,37 @@ Sitemap: /sitemap-relative-url.xml self.assertEqual([req.url for req in spider._parse_sitemap(r)], ['http://www.example.com/english/']) + def test_sitemapindex_filter(self): + sitemap = b""" + + + http://www.example.com/sitemap1.xml + 2004-01-01T20:00:00+00:00 + + + http://www.example.com/sitemap2.xml + 2005-01-01 + + """ + + class FilteredSitemapSpider(self.spider_class): + def sitemap_filter(self, entries): + from datetime import datetime + for entry in entries: + date_time = datetime.strptime(entry['lastmod'].split('T')[0], '%Y-%m-%d') + if date_time.year > 2004: + yield entry + + r = TextResponse(url="http://www.example.com/sitemap.xml", body=sitemap) + spider = self.spider_class("example.com") + self.assertEqual([req.url for req in spider._parse_sitemap(r)], + ['http://www.example.com/sitemap1.xml', + 'http://www.example.com/sitemap2.xml']) + + spider = FilteredSitemapSpider("example.com") + self.assertEqual([req.url for req in spider._parse_sitemap(r)], + ['http://www.example.com/sitemap2.xml']) + class DeprecationTest(unittest.TestCase): From 10f46bca54b2879da02641159e53453fe0cc97dc Mon Sep 17 00:00:00 2001 From: Victor Torres Date: Wed, 26 Dec 2018 11:20:18 -0300 Subject: [PATCH 205/889] documenting sitemap entries as suggested by @kmike --- docs/topics/spiders.rst | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/docs/topics/spiders.rst b/docs/topics/spiders.rst index 918f1cc36..9d4ed6ca6 100644 --- a/docs/topics/spiders.rst +++ b/docs/topics/spiders.rst @@ -703,6 +703,16 @@ SitemapSpider This would retrieve only ``entries`` modified on 2005 and the following years. + Entries are dict objects extracted from the sitemap document. + Usually, the key is the tag name and the value is the text inside it. + + It's important to notice that: + + - as the loc attribute is required, entries without this tag are discarded + - alternate links are stored in a list with the key ``alternate`` + (see ``sitemap_alternate_links``) + - namespaces are removed, so lxml tags named as ``{foo}bar`` become only ``bar`` + If you omit this method, all entries found in sitemaps will be processed, observing other attributes and their settings. From fe283bcd058734f88977a2033dfa36664e7ee619 Mon Sep 17 00:00:00 2001 From: Victor Torres Date: Wed, 26 Dec 2018 12:32:22 -0300 Subject: [PATCH 206/889] add test case for sitemap filter with alternate links --- tests/test_spider.py | 35 +++++++++++++++++++++++++++++++++++ 1 file changed, 35 insertions(+) diff --git a/tests/test_spider.py b/tests/test_spider.py index 8b56cfec1..fefdaa403 100644 --- a/tests/test_spider.py +++ b/tests/test_spider.py @@ -407,6 +407,41 @@ Sitemap: /sitemap-relative-url.xml self.assertEqual([req.url for req in spider._parse_sitemap(r)], ['http://www.example.com/english/']) + def test_sitemap_filter_with_alternate_links(self): + sitemap = b""" + + + http://www.example.com/english/article_1/ + 2010-01-01 + + + + http://www.example.com/english/article_2/ + 2015-01-01 + + """ + + class FilteredSitemapSpider(self.spider_class): + def sitemap_filter(self, entries): + for entry in entries: + alternate_links = entry.get('alternate', tuple()) + for link in alternate_links: + if '/deutsch/' in link: + entry['loc'] = link + yield entry + + r = TextResponse(url="http://www.example.com/sitemap.xml", body=sitemap) + spider = self.spider_class("example.com") + self.assertEqual([req.url for req in spider._parse_sitemap(r)], + ['http://www.example.com/english/article_1/', + 'http://www.example.com/english/article_2/']) + + spider = FilteredSitemapSpider("example.com") + self.assertEqual([req.url for req in spider._parse_sitemap(r)], + ['http://www.example.com/deutsch/article_1/']) + def test_sitemapindex_filter(self): sitemap = b""" From e1597f7c420ead9a563677aab61f18f9b89640a9 Mon Sep 17 00:00:00 2001 From: Victor Torres Date: Wed, 26 Dec 2018 15:05:21 -0300 Subject: [PATCH 207/889] improve readability --- docs/topics/spiders.rst | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/docs/topics/spiders.rst b/docs/topics/spiders.rst index 9d4ed6ca6..c47a2fca0 100644 --- a/docs/topics/spiders.rst +++ b/docs/topics/spiders.rst @@ -711,7 +711,7 @@ SitemapSpider - as the loc attribute is required, entries without this tag are discarded - alternate links are stored in a list with the key ``alternate`` (see ``sitemap_alternate_links``) - - namespaces are removed, so lxml tags named as ``{foo}bar`` become only ``bar`` + - namespaces are removed, so lxml tags named as ``{namespace}tagname`` become only ``tagname`` If you omit this method, all entries found in sitemaps will be processed, observing other attributes and their settings. From b68308779a6d2ce7deda3675d0bcdf671a4fb935 Mon Sep 17 00:00:00 2001 From: Victor Torres Date: Thu, 27 Dec 2018 17:37:59 -0300 Subject: [PATCH 208/889] improving docs --- docs/topics/spiders.rst | 20 +++++++++++++------- 1 file changed, 13 insertions(+), 7 deletions(-) diff --git a/docs/topics/spiders.rst b/docs/topics/spiders.rst index c47a2fca0..4f7135309 100644 --- a/docs/topics/spiders.rst +++ b/docs/topics/spiders.rst @@ -682,7 +682,8 @@ SitemapSpider .. method:: sitemap_filter(entries) - Specifies a function to filter sitemap entries and their attributes. + This is a filter funtion that could be overridden to select sitemap entries + based on their attributes. For example:: @@ -693,12 +694,17 @@ SitemapSpider We can define a ``sitemap_filter`` function to filter ``entries`` by date:: - def sitemap_filter(entries): - from datetime import datetime - for entry in entries: - date_time = datetime.strptime(entry['lastmod'], '%Y-%m-%d') - if date_time.year >= 2005: - yield entry + class FilteredSitemapSpider(scrapy.SitemapSpider): + name = 'filtered_sitemap_spider' + allowed_domains = ['example.com'] + sitemap_urls = ['http://example.com/sitemap.xml'] + + def sitemap_filter(self, entries): + from datetime import datetime + for entry in entries: + date_time = datetime.strptime(entry['lastmod'], '%Y-%m-%d') + if date_time.year >= 2005: + yield entry This would retrieve only ``entries`` modified on 2005 and the following years. From bfbcf52e9df77af7a7c9a8a7a711e06612be4763 Mon Sep 17 00:00:00 2001 From: Victor Torres Date: Thu, 27 Dec 2018 18:12:31 -0300 Subject: [PATCH 209/889] fix SitemapSpider import --- docs/topics/spiders.rst | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/docs/topics/spiders.rst b/docs/topics/spiders.rst index 4f7135309..39410d66e 100644 --- a/docs/topics/spiders.rst +++ b/docs/topics/spiders.rst @@ -694,7 +694,9 @@ SitemapSpider We can define a ``sitemap_filter`` function to filter ``entries`` by date:: - class FilteredSitemapSpider(scrapy.SitemapSpider): + from scrapy.spiders.sitemap import SitemapSpider + + class FilteredSitemapSpider(SitemapSpider): name = 'filtered_sitemap_spider' allowed_domains = ['example.com'] sitemap_urls = ['http://example.com/sitemap.xml'] From 5a824c906c501a204624ea7b4fb99904807c8b81 Mon Sep 17 00:00:00 2001 From: Victor Torres Date: Thu, 27 Dec 2018 18:34:41 -0300 Subject: [PATCH 210/889] using shorter import version and moving datetime import to the beginning of the code snippet --- docs/topics/spiders.rst | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/docs/topics/spiders.rst b/docs/topics/spiders.rst index 39410d66e..742a88659 100644 --- a/docs/topics/spiders.rst +++ b/docs/topics/spiders.rst @@ -694,7 +694,8 @@ SitemapSpider We can define a ``sitemap_filter`` function to filter ``entries`` by date:: - from scrapy.spiders.sitemap import SitemapSpider + from datetime import datetime + from scrapy.spiders import SitemapSpider class FilteredSitemapSpider(SitemapSpider): name = 'filtered_sitemap_spider' @@ -702,7 +703,6 @@ SitemapSpider sitemap_urls = ['http://example.com/sitemap.xml'] def sitemap_filter(self, entries): - from datetime import datetime for entry in entries: date_time = datetime.strptime(entry['lastmod'], '%Y-%m-%d') if date_time.year >= 2005: From e1f8b55ba0a132ed28c71661e2df3c5bc27feb75 Mon Sep 17 00:00:00 2001 From: Joaquin Garmendia Cabrera Date: Fri, 28 Dec 2018 16:53:12 -0500 Subject: [PATCH 211/889] Improve syntax for readability --- docs/topics/item-pipeline.rst | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/docs/topics/item-pipeline.rst b/docs/topics/item-pipeline.rst index 1c2c51e05..fae18200a 100644 --- a/docs/topics/item-pipeline.rst +++ b/docs/topics/item-pipeline.rst @@ -87,8 +87,8 @@ contain a price:: vat_factor = 1.15 def process_item(self, item, spider): - if 'price' in item and item['price']: - if 'price_excludes_vat' in item and item['price_excludes_vat']: + if item.get('price'): + if item.get('price_excludes_vat'): item['price'] = item['price'] * self.vat_factor return item else: From 6c78b3d5ef94791b11c2ce3dfd5cebd757a68b2a Mon Sep 17 00:00:00 2001 From: Eugenio Lacuesta Date: Thu, 3 Jan 2019 13:15:58 -0300 Subject: [PATCH 212/889] Deques can't be sliced, use itertools.islice instead --- scrapy/core/spidermw.py | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/scrapy/core/spidermw.py b/scrapy/core/spidermw.py index 58bd7c2c8..e07f76bdf 100644 --- a/scrapy/core/spidermw.py +++ b/scrapy/core/spidermw.py @@ -3,7 +3,7 @@ Spider Middleware manager See documentation in docs/topics/spider-middleware.rst """ -from itertools import chain +from itertools import chain, islice import six from twisted.python.failure import Failure @@ -58,7 +58,7 @@ class SpiderMiddlewareManager(MiddlewareManager): # don't handle _InvalidOutput exception if isinstance(exception, _InvalidOutput): return _failure - method_list = self.methods['process_spider_exception'][start_index:] + method_list = islice(self.methods['process_spider_exception'], start_index, None) for method_index, method in enumerate(method_list, start=start_index): if method is None: continue @@ -89,7 +89,7 @@ class SpiderMiddlewareManager(MiddlewareManager): raise recovered.extend(exception_result) - method_list = self.methods['process_spider_output'][start_index:] + method_list = islice(self.methods['process_spider_output'], start_index, None) for method_index, method in enumerate(method_list, start=start_index): if method is None: continue From 50a0d87d1e472fcc514f3dc2b028b653b7826a9c Mon Sep 17 00:00:00 2001 From: Eugenio Lacuesta Date: Thu, 3 Jan 2019 17:20:08 -0300 Subject: [PATCH 213/889] Passing keyword arguments to callbacks --- scrapy/core/scraper.py | 2 +- scrapy/http/request/__init__.py | 3 ++- 2 files changed, 3 insertions(+), 2 deletions(-) diff --git a/scrapy/core/scraper.py b/scrapy/core/scraper.py index ee1e95a0c..7981ce231 100644 --- a/scrapy/core/scraper.py +++ b/scrapy/core/scraper.py @@ -143,7 +143,7 @@ class Scraper(object): def call_spider(self, result, request, spider): result.request = request dfd = defer_result(result) - dfd.addCallbacks(request.callback or spider.parse, request.errback) + dfd.addCallbacks(request.callback or spider.parse, request.errback, callbackKeywords=request.kwargs) return dfd.addCallback(iterate_spider_output) def handle_spider_error(self, _failure, request, response, spider): diff --git a/scrapy/http/request/__init__.py b/scrapy/http/request/__init__.py index cd4360483..7d5cc9dae 100644 --- a/scrapy/http/request/__init__.py +++ b/scrapy/http/request/__init__.py @@ -18,7 +18,7 @@ class Request(object_ref): def __init__(self, url, callback=None, method='GET', headers=None, body=None, cookies=None, meta=None, encoding='utf-8', priority=0, - dont_filter=False, errback=None, flags=None): + dont_filter=False, errback=None, flags=None, kwargs=None): self._encoding = encoding # this one has to be set first self.method = str(method).upper() @@ -41,6 +41,7 @@ class Request(object_ref): self._meta = dict(meta) if meta else None self.flags = [] if flags is None else list(flags) + self.kwargs = dict(kwargs) if kwargs else None @property def meta(self): From a2b509a42266a2ab3389de64b608e616f88f77e5 Mon Sep 17 00:00:00 2001 From: Eugenio Lacuesta Date: Thu, 3 Jan 2019 17:38:06 -0300 Subject: [PATCH 214/889] Pass callback kwargs with response.follow --- scrapy/http/response/__init__.py | 5 +++-- scrapy/http/response/text.py | 5 +++-- 2 files changed, 6 insertions(+), 4 deletions(-) diff --git a/scrapy/http/response/__init__.py b/scrapy/http/response/__init__.py index 1974259b5..99b04a26e 100644 --- a/scrapy/http/response/__init__.py +++ b/scrapy/http/response/__init__.py @@ -106,7 +106,7 @@ class Response(object_ref): def follow(self, url, callback=None, method='GET', headers=None, body=None, cookies=None, meta=None, encoding='utf-8', priority=0, - dont_filter=False, errback=None): + dont_filter=False, errback=None, kwargs=None): # type: (...) -> Request """ Return a :class:`~.Request` instance to follow a link ``url``. @@ -132,4 +132,5 @@ class Response(object_ref): encoding=encoding, priority=priority, dont_filter=dont_filter, - errback=errback) + errback=errback, + kwargs=kwargs) diff --git a/scrapy/http/response/text.py b/scrapy/http/response/text.py index 74a042f2c..2039621b3 100644 --- a/scrapy/http/response/text.py +++ b/scrapy/http/response/text.py @@ -123,7 +123,7 @@ class TextResponse(Response): def follow(self, url, callback=None, method='GET', headers=None, body=None, cookies=None, meta=None, encoding=None, priority=0, - dont_filter=False, errback=None): + dont_filter=False, errback=None, kwargs=None): # type: (...) -> Request """ Return a :class:`~.Request` instance to follow a link ``url``. @@ -154,7 +154,8 @@ class TextResponse(Response): encoding=encoding, priority=priority, dont_filter=dont_filter, - errback=errback + errback=errback, + kwargs=kwargs, ) From 69a1ee79aa43bb1444e5b2a800a2e1702db6866e Mon Sep 17 00:00:00 2001 From: Eugenio Lacuesta Date: Thu, 3 Jan 2019 17:38:29 -0300 Subject: [PATCH 215/889] Copy request.kwargs --- scrapy/http/request/__init__.py | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/scrapy/http/request/__init__.py b/scrapy/http/request/__init__.py index 7d5cc9dae..9a155f415 100644 --- a/scrapy/http/request/__init__.py +++ b/scrapy/http/request/__init__.py @@ -93,7 +93,7 @@ class Request(object_ref): given new values. """ for x in ['url', 'method', 'headers', 'body', 'cookies', 'meta', 'flags', - 'encoding', 'priority', 'dont_filter', 'callback', 'errback']: + 'encoding', 'priority', 'dont_filter', 'callback', 'errback', 'kwargs']: kwargs.setdefault(x, getattr(self, x)) cls = kwargs.pop('cls', self.__class__) return cls(*args, **kwargs) From a67f1ce512ffa111a400e2718ebbf3e7bd32d0ae Mon Sep 17 00:00:00 2001 From: Eugenio Lacuesta Date: Thu, 3 Jan 2019 17:49:41 -0300 Subject: [PATCH 216/889] Serialize Request kwargs --- scrapy/utils/reqser.py | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/scrapy/utils/reqser.py b/scrapy/utils/reqser.py index 959dddbd5..d537057b1 100644 --- a/scrapy/utils/reqser.py +++ b/scrapy/utils/reqser.py @@ -32,7 +32,8 @@ def request_to_dict(request, spider=None): '_encoding': request._encoding, 'priority': request.priority, 'dont_filter': request.dont_filter, - 'flags': request.flags + 'flags': request.flags, + 'kwargs': request.kwargs, } if type(request) is not Request: d['_class'] = request.__module__ + '.' + request.__class__.__name__ @@ -64,7 +65,9 @@ def request_from_dict(d, spider=None): encoding=d['_encoding'], priority=d['priority'], dont_filter=d['dont_filter'], - flags=d.get('flags')) + flags=d.get('flags'), + kwargs=d.get('kwargs'), + ) def _find_method(obj, func): From 770a501fb32b7582acaa5900ac2f41ea46a321cd Mon Sep 17 00:00:00 2001 From: Eugenio Lacuesta Date: Wed, 9 Jan 2019 10:40:03 -0300 Subject: [PATCH 217/889] Test request kwargs (copy, serialization) --- scrapy/http/request/__init__.py | 8 +++++++- tests/test_http_request.py | 5 +++++ tests/test_utils_reqser.py | 2 ++ 3 files changed, 14 insertions(+), 1 deletion(-) diff --git a/scrapy/http/request/__init__.py b/scrapy/http/request/__init__.py index 9a155f415..c016eb727 100644 --- a/scrapy/http/request/__init__.py +++ b/scrapy/http/request/__init__.py @@ -40,8 +40,14 @@ class Request(object_ref): self.dont_filter = dont_filter self._meta = dict(meta) if meta else None + self._kwargs = dict(kwargs) if kwargs else None self.flags = [] if flags is None else list(flags) - self.kwargs = dict(kwargs) if kwargs else None + + @property + def kwargs(self): + if self._kwargs is None: + self._kwargs = {} + return self._kwargs @property def meta(self): diff --git a/tests/test_http_request.py b/tests/test_http_request.py index 58326a384..610893d8a 100644 --- a/tests/test_http_request.py +++ b/tests/test_http_request.py @@ -177,6 +177,7 @@ class RequestTest(unittest.TestCase): r1 = self.request_class("http://www.example.com", flags=['f1', 'f2'], callback=somecallback, errback=somecallback) r1.meta['foo'] = 'bar' + r1.kwargs['key'] = 'value' r2 = r1.copy() # make sure copy does not propagate callbacks @@ -189,6 +190,10 @@ class RequestTest(unittest.TestCase): assert r1.flags is not r2.flags, "flags must be a shallow copy, not identical" self.assertEqual(r1.flags, r2.flags) + # make sure kwargs dict is shallow copied + assert r1.kwargs is not r2.kwargs, "kwargs must be a shallow copy, not identical" + self.assertEqual(r1.kwargs, r2.kwargs) + # make sure meta dict is shallow copied assert r1.meta is not r2.meta, "meta must be a shallow copy, not identical" self.assertEqual(r1.meta, r2.meta) diff --git a/tests/test_utils_reqser.py b/tests/test_utils_reqser.py index dcc070b8f..76de20f22 100644 --- a/tests/test_utils_reqser.py +++ b/tests/test_utils_reqser.py @@ -26,6 +26,7 @@ class RequestSerializationTest(unittest.TestCase): encoding='latin-1', priority=20, meta={'a': 'b'}, + kwargs={'k': 'v'}, flags=['testFlag']) self._assert_serializes_ok(r, spider=self.spider) @@ -52,6 +53,7 @@ class RequestSerializationTest(unittest.TestCase): self.assertEqual(r1.headers, r2.headers) self.assertEqual(r1.cookies, r2.cookies) self.assertEqual(r1.meta, r2.meta) + self.assertEqual(r1.kwargs, r2.kwargs) self.assertEqual(r1._encoding, r2._encoding) self.assertEqual(r1.priority, r2.priority) self.assertEqual(r1.dont_filter, r2.dont_filter) From 57e7c769779b9d37058d1d8839215a9c269b8c5b Mon Sep 17 00:00:00 2001 From: Eugenio Lacuesta Date: Wed, 9 Jan 2019 10:40:44 -0300 Subject: [PATCH 218/889] Test callback kwargs --- tests/spiders.py | 34 ++++++++++++++++++++++++++++++++++ tests/test_crawl.py | 8 +++++++- 2 files changed, 41 insertions(+), 1 deletion(-) diff --git a/tests/spiders.py b/tests/spiders.py index 7816bf7c7..5a1471072 100644 --- a/tests/spiders.py +++ b/tests/spiders.py @@ -28,6 +28,40 @@ class MetaSpider(MockServerSpider): self.meta['close_reason'] = reason +class KeywordArgumentsSpider(MockServerSpider): + + name = 'kwargs' + checks = set() + + def start_requests(self): + data = {'key': 'value', 'number': 123} + yield Request(self.mockserver.url('/first'), self.parse_first, kwargs=data) + yield Request(self.mockserver.url('/general_with'), self.parse_general, kwargs=data) + yield Request(self.mockserver.url('/general_without'), self.parse_general) + yield Request(self.mockserver.url('/no_kwargs'), self.parse_no_kwargs) + + def parse_first(self, response, key, number): + self.checks.add(key == 'value') + self.checks.add(number == 123) + yield response.follow( + self.mockserver.url('/two'), + self.parse_second, + kwargs={'new_key': 'new_value'}) + + def parse_second(self, response, new_key): + self.checks.add(new_key == 'new_value') + + def parse_general(self, response, **kwargs): + if response.url.endswith('/general_with'): + self.checks.add(kwargs['key'] == 'value') + self.checks.add(kwargs['number'] == 123) + elif response.url.endswith('/general_without'): + self.checks.add(kwargs == {}) + + def parse_no_kwargs(self, response): + pass + + class FollowAllSpider(MetaSpider): name = 'follow' diff --git a/tests/test_crawl.py b/tests/test_crawl.py index 3fc13eeb7..3879a017c 100644 --- a/tests/test_crawl.py +++ b/tests/test_crawl.py @@ -8,7 +8,7 @@ from twisted.trial.unittest import TestCase from scrapy.http import Request from scrapy.crawler import CrawlerRunner from scrapy.utils.python import to_unicode -from tests.spiders import FollowAllSpider, DelaySpider, SimpleSpider, \ +from tests.spiders import FollowAllSpider, DelaySpider, SimpleSpider, KeywordArgumentsSpider, \ BrokenStartRequestsSpider, SingleRequestSpider, DuplicateStartRequestsSpider from tests.mockserver import MockServer @@ -23,6 +23,12 @@ class CrawlTestCase(TestCase): def tearDown(self): self.mockserver.__exit__(None, None, None) + @defer.inlineCallbacks + def test_callback_kwargs(self): + crawler = self.runner.create_crawler(KeywordArgumentsSpider) + yield crawler.crawl(mockserver=self.mockserver) + self.assertEqual(crawler.spider.checks, set([True])) + @defer.inlineCallbacks def test_follow_all(self): crawler = self.runner.create_crawler(FollowAllSpider) From 3f914f6d8c369a18e1f856c01b7d1ad2a63f6e49 Mon Sep 17 00:00:00 2001 From: kasun Herath Date: Mon, 14 Jan 2019 23:03:14 +0530 Subject: [PATCH 219/889] made jsonrequest dump into private method --- scrapy/http/request/json_request.py | 15 +++++++++------ tests/test_http_request.py | 2 +- 2 files changed, 10 insertions(+), 7 deletions(-) diff --git a/scrapy/http/request/json_request.py b/scrapy/http/request/json_request.py index 7499610b9..1e2c6b0c6 100644 --- a/scrapy/http/request/json_request.py +++ b/scrapy/http/request/json_request.py @@ -5,6 +5,7 @@ This module implements the JSONRequest class which is a more convenient class See documentation in docs/topics/request-response.rst """ +import copy import json import warnings @@ -13,7 +14,10 @@ from scrapy.http.request import Request class JSONRequest(Request): def __init__(self, *args, **kwargs): - dumps_kwargs = kwargs.pop('dumps_kwargs', {}) + dumps_kwargs = copy.deepcopy(kwargs.pop('dumps_kwargs', {})) + dumps_kwargs['sort_keys'] = True + self._dumps_kwargs = dumps_kwargs + body_passed = kwargs.get('body', None) is not None data = kwargs.pop('data', None) data_passed = data is not None @@ -22,7 +26,7 @@ class JSONRequest(Request): warnings.warn('Both body and data passed. data will be ignored') elif not body_passed and data_passed: - kwargs['body'] = self.dump(data, **dumps_kwargs) + kwargs['body'] = self._dumps(data) if 'method' not in kwargs: kwargs['method'] = 'POST' @@ -30,7 +34,6 @@ class JSONRequest(Request): super(JSONRequest, self).__init__(*args, **kwargs) self.headers.setdefault('Content-Type', 'application/json') self.headers.setdefault('Accept', 'application/json, text/javascript, */*; q=0.01') - self._dumps_kwargs = dumps_kwargs def replace(self, *args, **kwargs): body_passed = kwargs.get('body', None) is not None @@ -41,10 +44,10 @@ class JSONRequest(Request): warnings.warn('Both body and data passed. data will be ignored') elif not body_passed and data_passed: - kwargs['body'] = self.dump(data, **self._dumps_kwargs) + kwargs['body'] = self._dumps(data) return super(JSONRequest, self).replace(*args, **kwargs) - def dump(self, data, **kwargs): + def _dumps(self, data): """Convert to JSON """ - return json.dumps(data, sort_keys=True, **kwargs) + return json.dumps(data, **self._dumps_kwargs) diff --git a/tests/test_http_request.py b/tests/test_http_request.py index 6dcfa25da..49f148016 100644 --- a/tests/test_http_request.py +++ b/tests/test_http_request.py @@ -1292,7 +1292,7 @@ class JSONRequestTest(RequestTest): self.assertEqual(kwargs['sort_keys'], True) def test_replace_dumps_kwargs(self): - """ Test that dumps_kwargs are provided json.dumps when replace is called """ + """ Test that dumps_kwargs are provided to json.dumps when replace is called """ data1 = { 'name1': 'value1', } From bddfeaba4c17040b2986403f8b2ba25d4252e1b5 Mon Sep 17 00:00:00 2001 From: Eugenio Lacuesta Date: Tue, 15 Jan 2019 15:35:46 -0300 Subject: [PATCH 220/889] Add Request.kwargs docs --- docs/topics/request-response.rst | 40 +++++++++++++++++++++++++++----- 1 file changed, 34 insertions(+), 6 deletions(-) diff --git a/docs/topics/request-response.rst b/docs/topics/request-response.rst index e29914dbf..d12766676 100644 --- a/docs/topics/request-response.rst +++ b/docs/topics/request-response.rst @@ -24,7 +24,7 @@ below in :ref:`topics-request-response-ref-request-subclasses` and Request objects =============== -.. class:: Request(url[, callback, method='GET', headers, body, cookies, meta, encoding='utf-8', priority=0, dont_filter=False, errback, flags]) +.. class:: Request(url[, callback, method='GET', headers, body, cookies, meta, encoding='utf-8', priority=0, dont_filter=False, errback, flags, kwargs]) A :class:`Request` object represents an HTTP request, which is usually generated in the Spider and executed by the Downloader, and thus generating @@ -126,6 +126,9 @@ Request objects :param flags: Flags sent to the request, can be used for logging or similar purposes. :type flags: list + :param kwargs: A dict with arbitrary data that will be passed as keyword arguments to the Request's callback. + :type kwargs: dict + .. attribute:: Request.url A string containing the URL of this request. Keep in mind that this @@ -165,6 +168,17 @@ Request objects ``copy()`` or ``replace()`` methods, and can also be accessed, in your spider, from the ``response.meta`` attribute. + .. attribute:: Request.kwargs + + A dictionary that contains arbitrary metadata for this request. Its contents + will be passed to the Request's callback as keyword arguments. It is empty + for new Requests, which means by default callbacks only get a :class:`Response` + object as argument. + + This dict is `shallow copied`_ when the request is cloned using the + ``copy()`` or ``replace()`` methods, and can also be accessed, in your + spider, from the ``response.kwargs`` attribute. + .. _shallow copied: https://docs.python.org/2/library/copy.html .. method:: Request.copy() @@ -200,11 +214,9 @@ Example:: self.logger.info("Visited %s", response.url) In some cases you may be interested in passing arguments to those callback -functions so you can receive the arguments later, in the second callback. You -can use the :attr:`Request.meta` attribute for that. - -Here's an example of how to pass an item using this mechanism, to populate -different fields from different pages:: +functions so you can receive the arguments later, in the second callback. +The following two examples show how to achieve this by using the +:attr:`Request.meta` and :attr:`Request.kwargs` attributes respectively:: def parse_page1(self, response): item = MyItem() @@ -219,6 +231,22 @@ different fields from different pages:: item['other_url'] = response.url yield item +:: + + def parse_page1(self, response): + item = MyItem() + item['main_url'] = response.url + request = scrapy.Request("http://www.example.com/some_page.html", + callback=self.parse_page2) + request.kwargs['item'] = item + request.kwargs['foo'] = 'bar' + yield request + + def parse_page2(self, response, item, foo): + item['other_url'] = response.url + item['foo'] = foo + yield item + .. _topics-request-response-ref-errbacks: From bdf12f775062fda8aa8bf03f7b4faade4faac16d Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?J=C3=BAlio=20C=C3=A9sar=20Batista?= Date: Fri, 18 Jan 2019 11:38:59 -0200 Subject: [PATCH 221/889] Logging the request referer when DUPEFILTER_DEBUG is active --- scrapy/dupefilters.py | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/scrapy/dupefilters.py b/scrapy/dupefilters.py index 9d8966b9c..0bcdd3495 100644 --- a/scrapy/dupefilters.py +++ b/scrapy/dupefilters.py @@ -3,8 +3,7 @@ import os import logging from scrapy.utils.job import job_dir -from scrapy.utils.request import request_fingerprint - +from scrapy.utils.request import referer_str, request_fingerprint class BaseDupeFilter(object): @@ -61,8 +60,9 @@ class RFPDupeFilter(BaseDupeFilter): def log(self, request, spider): if self.debug: - msg = "Filtered duplicate request: %(request)s" - self.logger.debug(msg, {'request': request}, extra={'spider': spider}) + msg = "Filtered duplicate request: %(request)s (referer: %(referer)s)" + args = {'request': request, 'referer': referer_str(request) } + self.logger.debug(msg, args, extra={'spider': spider}) elif self.logdupes: msg = ("Filtered duplicate request: %(request)s" " - no more duplicates will be shown" From 8eade7d8640e112faf8677f4666bbe3ab10c7234 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?J=C3=BAlio=20C=C3=A9sar=20Batista?= Date: Fri, 18 Jan 2019 11:39:35 -0200 Subject: [PATCH 222/889] Testing stats and log messages from RFPDupeFilter --- tests/test_dupefilters.py | 57 ++++++++++++++++++++++++++++++++++++++- 1 file changed, 56 insertions(+), 1 deletion(-) diff --git a/tests/test_dupefilters.py b/tests/test_dupefilters.py index db69597a2..d7eb98c97 100644 --- a/tests/test_dupefilters.py +++ b/tests/test_dupefilters.py @@ -2,6 +2,7 @@ import hashlib import tempfile import unittest import shutil +from testfixtures import LogCapture from scrapy.dupefilters import RFPDupeFilter from scrapy.http import Request @@ -9,7 +10,7 @@ from scrapy.core.scheduler import Scheduler from scrapy.utils.python import to_bytes from scrapy.utils.job import job_dir from scrapy.utils.test import get_crawler - +from tests.spiders import SimpleSpider class FromCrawlerRFPDupeFilter(RFPDupeFilter): @@ -126,3 +127,57 @@ class RFPDupeFilterTest(unittest.TestCase): assert case_insensitive_dupefilter.request_seen(r2) case_insensitive_dupefilter.close('finished') + + def test_log(self): + with LogCapture() as l: + settings = {'DUPEFILTER_DEBUG': False, + 'DUPEFILTER_CLASS': __name__ + '.FromCrawlerRFPDupeFilter'} + crawler = get_crawler(SimpleSpider, settings_dict=settings) + scheduler = Scheduler.from_crawler(crawler) + spider = SimpleSpider.from_crawler(crawler) + + dupefilter = scheduler.df + dupefilter.open() + + r1 = Request('http://scrapytest.org/index.html') + r2 = Request('http://scrapytest.org/index.html') + + dupefilter.log(r1, spider) + dupefilter.log(r2, spider) + + assert crawler.stats.get_value('dupefilter/filtered') == 2 + l.check_present(('scrapy.dupefilters', 'DEBUG', + ('Filtered duplicate request: ' + ' - no more duplicates will be shown' + ' (see DUPEFILTER_DEBUG to show all duplicates)'))) + + dupefilter.close('finished') + + def test_log_debug(self): + with LogCapture() as l: + settings = {'DUPEFILTER_DEBUG': True, + 'DUPEFILTER_CLASS': __name__ + '.FromCrawlerRFPDupeFilter'} + crawler = get_crawler(SimpleSpider, settings_dict=settings) + scheduler = Scheduler.from_crawler(crawler) + spider = SimpleSpider.from_crawler(crawler) + + dupefilter = scheduler.df + dupefilter.open() + + r1 = Request('http://scrapytest.org/index.html') + r2 = Request('http://scrapytest.org/index.html', + headers={'Referer': 'http://scrapytest.org/INDEX.html'} + ) + + dupefilter.log(r1, spider) + dupefilter.log(r2, spider) + + assert crawler.stats.get_value('dupefilter/filtered') == 2 + l.check_present(('scrapy.dupefilters', 'DEBUG', + ('Filtered duplicate request: ' + ' (referer: None)'))) + l.check_present(('scrapy.dupefilters', 'DEBUG', + ('Filtered duplicate request: ' + ' (referer: http://scrapytest.org/INDEX.html)'))) + + dupefilter.close('finished') From 71743a6546e96b5d99bd3c068a7ec5b71dca1659 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Daniel=20Gra=C3=B1a?= Date: Sat, 19 Jan 2019 18:43:58 +0000 Subject: [PATCH 223/889] Add release notes for v1.5.2 --- docs/news.rst | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/docs/news.rst b/docs/news.rst index 01016e2e6..adf679ded 100644 --- a/docs/news.rst +++ b/docs/news.rst @@ -12,6 +12,22 @@ Cleanups * Remove deprecated ``CrawlerSettings`` class. * Remove deprecated ``Settings.overrides`` and ``Settings.defaults`` attributes. +Scrapy 1.5.2 (2019-01-22) +------------------------- + +* *Security bugfix*: Telnet console extension can be easily exploited by rogue + websites POSTing content to http://localhost:6023, we haven't found a way to + exploit it from Scrapy, but it is very easy to trick a browser to do so and + elevates the risk for local development environment. + + *The fix is backwards incompatible*, it enables telnet user-password + authentication by default with a random generated password. If you can't + upgrade right away, please consider setting :setting:`TELNET_CONSOLE_PORT` + out of its default value. + + See :ref:`telnet console ` documentation for more info + +* Backport CI build failure under GCE environemnt due to boto import error. Scrapy 1.5.1 (2018-07-12) ------------------------- From d9aa5391327dd34f8d840e7ce2bca1eb8583d932 Mon Sep 17 00:00:00 2001 From: kasun Herath Date: Fri, 25 Jan 2019 21:26:28 +0530 Subject: [PATCH 224/889] enabled sort keys only if not provided --- scrapy/http/request/json_request.py | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/scrapy/http/request/json_request.py b/scrapy/http/request/json_request.py index 1e2c6b0c6..8f7a61a6d 100644 --- a/scrapy/http/request/json_request.py +++ b/scrapy/http/request/json_request.py @@ -15,7 +15,7 @@ from scrapy.http.request import Request class JSONRequest(Request): def __init__(self, *args, **kwargs): dumps_kwargs = copy.deepcopy(kwargs.pop('dumps_kwargs', {})) - dumps_kwargs['sort_keys'] = True + dumps_kwargs.setdefault('sort_keys', True) self._dumps_kwargs = dumps_kwargs body_passed = kwargs.get('body', None) is not None From b828b5f8c8650a30aef382af661b6c7b9ea57186 Mon Sep 17 00:00:00 2001 From: Harry Moreno Date: Sat, 26 Jan 2019 18:39:05 -0500 Subject: [PATCH 225/889] fix grammar --- docs/topics/jobs.rst | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/docs/topics/jobs.rst b/docs/topics/jobs.rst index 8e1574376..ea684b4cf 100644 --- a/docs/topics/jobs.rst +++ b/docs/topics/jobs.rst @@ -30,7 +30,7 @@ a *single* job. How to use it ============= -To start a spider with persistence supported enabled, run it like this:: +To start a spider with persistence support enabled, run it like this:: scrapy crawl somespider -s JOBDIR=crawls/somespider-1 From 8fca98616a90d8452ff2e488bfea93e5c89caf08 Mon Sep 17 00:00:00 2001 From: Harry Moreno Date: Sat, 26 Jan 2019 16:47:10 -0500 Subject: [PATCH 226/889] fix grammar --- docs/topics/media-pipeline.rst | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/docs/topics/media-pipeline.rst b/docs/topics/media-pipeline.rst index a1f518cbd..c60b55391 100644 --- a/docs/topics/media-pipeline.rst +++ b/docs/topics/media-pipeline.rst @@ -310,7 +310,7 @@ images. .. setting:: IMAGES_THUMBS -In order use this feature, you must set :setting:`IMAGES_THUMBS` to a dictionary +In order to use this feature, you must set :setting:`IMAGES_THUMBS` to a dictionary where the keys are the thumbnail names and the values are their dimensions. For example:: From e3e804cfb0fc05ef3fc569ec6e0af247ce504d06 Mon Sep 17 00:00:00 2001 From: Eugenio Lacuesta Date: Mon, 28 Jan 2019 15:10:34 -0300 Subject: [PATCH 227/889] Styling nitpick :-) --- scrapy/core/downloader/middleware.py | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/scrapy/core/downloader/middleware.py b/scrapy/core/downloader/middleware.py index a8e6f93a3..7a6a4dfac 100644 --- a/scrapy/core/downloader/middleware.py +++ b/scrapy/core/downloader/middleware.py @@ -41,7 +41,7 @@ class DownloaderMiddlewareManager(MiddlewareManager): (six.get_method_self(method).__class__.__name__, response.__class__.__name__)) if response: defer.returnValue(response) - defer.returnValue((yield download_func(request=request,spider=spider))) + defer.returnValue((yield download_func(request=request, spider=spider))) @defer.inlineCallbacks def process_response(response): From 706910790b6ee755bafa828606e215e668af3eee Mon Sep 17 00:00:00 2001 From: Mikhail Korobov Date: Wed, 26 Dec 2018 18:28:24 +0500 Subject: [PATCH 228/889] [wip] draft 1.6 release notes --- docs/news.rst | 153 +++++++++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 150 insertions(+), 3 deletions(-) diff --git a/docs/news.rst b/docs/news.rst index adf679ded..99a339cea 100644 --- a/docs/news.rst +++ b/docs/news.rst @@ -6,11 +6,156 @@ Release notes Scrapy 1.6.0 (unreleased) ------------------------- +Highlights for this release: + +* better Windows compatibility; +* Python 3.7 compatibility; +* big documentation improvements, including a switch + from ``.extract() / .extract_first()`` API to ``.get() / .getall()`` API; +* Feed exports, FilePipeline and MediaPipeline improvements; +* ``scrapy.contracts`` fixes and new features; +* large clean-up of deprecated code +* TODO + +parsel 1.5 +~~~~~~~~~~ + +TODO +While this is not a change in Scrapy itself, a new version of ``parsel`` +is released; Scrapy now depends on ``parsel >= 1.5``. + +Feed export improvements +~~~~~~~~~~~~~~~~~~~~~~~~ + +* ``from_crawler`` support is added to feed exporters and feed storages. This, + among other things, allow to access Scrapy settings from custom storages + and exporters (:issue:`1605`, :issue:`3348`). +* fixed issue with extra blank lines in .csv exports under Windows + (:issue:`3039`); +* better error message when an exporter is disabled (:issue:`3358`); + +FilePipeline and MediaPipeline improvements +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +* Expose more options for S3FilesStore: :setting:`AWS_ENDPOINT_URL`, + :setting:`AWS_USE_SSL`, :setting:`AWS_VERIFY`, :setting:`AWS_REGION_NAME`. + For example, this allows to use alternative or self-hosted + AWS-compatible providers (:issue:`2609`). +* ACL support for Google Cloud Storage: :setting:`FILES_STORE_GCS_ACL` and + :setting:`IMAGES_STORE_GCS_ACL` (:issue:`3199`). + +``scrapy.contracts`` improvements +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +* Exceptions in contracts code are handled better (:issue:`3377`); +* ``dont_filter=True`` is used for contract requests, which allows to test + different callbacks with the same URL (:issue:`3381`); +* ``request_cls`` attribute in Contract subclasses allow to use different + Request classes in contracts, for example FormRequest (:issue:`3383`). +* Fixed errback handling in contracts, e.g. for cases where a contract + is executed for URL which returns non-200 response (:issue:`3371`). + +Documentation improvements +~~~~~~~~~~~~~~~~~~~~~~~~~~ + +* Docs are re-written to suggest .get/.getall API instead of + .extract/.extract_first. Also, :ref:`topics-selectors` docs are updated + and re-structured to match latest parsel docs; they now contain more topics, + such as :ref:`selecting-attributes` or :ref:`topics-selectors-css-extensions` + (:issue:`3390`). +* :ref:`topics-developer-tools` is a new tutorial which replaces + old Firefox and Firebug tutorials (:issue:`3400`). +* SCRAPY_PROJECT environment variable is documented (:issue:`3518`); +* troubleshooting section is added to install instructions (:issue:`3517`); +* improved links to beginner resources in the tutorial + (:issue:`3367`, :issue:`3468`); +* fixed :setting:`RETRY_HTTP_CODES` default values in docs (:issue:`3335`); +* remove unused `DEPTH_STATS` option from docs (:issue:`3245`); +* other cleanups (:issue:`3347`, :issue:`3350`, :issue:`3445`). + +Better Windows support +~~~~~~~~~~~~~~~~~~~~~~ + +* All Scrapy tests now pass on Windows; Scrapy testing suite is executed + in a Windows environment on CI (:issue:`3315`). +* Scrapy used to produce unnecessary blank lines in .csv exports on Windows, + this is fixed (:issue:`3039`). + +Testing fixes +~~~~~~~~~~~~~ + +* Python 3.7 support (:issue:`3326`, :issue:`3150`, :issue:`3547`) +* Testing and CI fixes (:issue:`3526`, :issue:`3538`, :issue:`3308`, + :issue:`3311`, :issue:`3309`, :issue:`3305`, :issue:`3210`, :issue:`3299`) + +Deprecation removals +~~~~~~~~~~~~~~~~~~~~ + +Compatibility shims for pre-1.0 Scrapy module names are removed +(:issue:`3318`): + +* ``scrapy.command`` +* ``scrapy.contrib`` (with all submodules) +* ``scrapy.contrib_exp`` (with all submodules) +* ``scrapy.dupefilter`` +* ``scrapy.linkextractor`` +* ``scrapy.project`` +* ``scrapy.spider`` +* ``scrapy.spidermanager`` +* ``scrapy.squeue`` +* ``scrapy.stats`` +* ``scrapy.statscol`` +* ``scrapy.utils.decorator`` + +See :ref:`module_relocations` for more information, or use suggestions +from Scrapy 1.5.x deprecation warnings to update your code. + +Other deprecation removals: + +* Deprecated scrapy.interfaces.ISpiderManager is removed; please use + scrapy.interfaces.ISpiderLoader. +* Deprecated ``CrawlerSettings`` class is removed (:issue:`3327`). +* Deprecated ``Settings.overrides`` and ``Settings.defaults`` attributes + are removed (:issue:`3327`, :issue:`3359`). + +Internal improvements +~~~~~~~~~~~~~~~~~~~~~ + +* ``from_crawler`` support is added to dupefilters (:issue:`2956`); this allows + to access e.g. settings or a spider from a dupefilter. +* :signal:`item_error` is fired when an error happens in a pipeline + (:issue:`3256`); +* :signal:`request_reached_downloader` is fired when Downloader gets + a new Request; this signal can be useful e.g. for custom Schedulers + (:issue:`3393`). +* ``scrapy.http.cookies.CookieJar.clear`` accepts "domain", "path" and "name" + optional arguments (:issue:`3231`). + +Usability improvements +~~~~~~~~~~~~~~~~~~~~~~ + +* more stats for RobotsTxtMiddleware (:issue:`3100`) +* INFO log level is used to show telnet host/port (:issue:`3115`) +* a message is added to IgnoreRequest in RobotsTxtMiddleware (:issue:`3113`) +* better validation of ``url`` argument in ``Response.follow`` (:issue:`3131`) +* non-zero exit code is returned from Scrapy commands when error happens + on spider inititalization (:issue:`3226`) +* Link extraction improvements: "ftp" is added to scheme list (:issue:`3152`); + "flv" is added to common video extensions (:issue:`3165`) + +Bug fixes +~~~~~~~~~ +* proper handling of pickling errors in Python 3 when serializing objects + for disk queues (:issue:`3082`) +* flags are now preserved when copying Requests (:issue:`3342`); +* FormRequest.from_response clickdata shouldn't ignore elements with + ``input[type=image]`` (:issue:`3153`). +* FormRequest.from_response should preserve duplicate keys (:issue:`3247`) + Cleanups ~~~~~~~~ - -* Remove deprecated ``CrawlerSettings`` class. -* Remove deprecated ``Settings.overrides`` and ``Settings.defaults`` attributes. +* additional files are included to sdist (:issue:`3495`); +* code style fixes (:issue:`3405`, :issue:`3304`) Scrapy 1.5.2 (2019-01-22) ------------------------- @@ -1080,6 +1225,8 @@ until it reaches a stable status. See more examples for scripts running Scrapy: :ref:`topics-practices` +.. _module_relocations: + Module Relocations ~~~~~~~~~~~~~~~~~~ From e479f5aa15809e7f75a7dbc20d0629f57be46b5d Mon Sep 17 00:00:00 2001 From: Mikhail Korobov Date: Thu, 27 Dec 2018 00:48:10 +0500 Subject: [PATCH 229/889] DOC update changelog * changes from recently merged pull requests * more highlights * re-organized headers * Selector API changes --- docs/news.rst | 142 +++++++++++++++++++++++++++++++++++++------------- 1 file changed, 105 insertions(+), 37 deletions(-) diff --git a/docs/news.rst b/docs/news.rst index 99a339cea..bf469a350 100644 --- a/docs/news.rst +++ b/docs/news.rst @@ -6,41 +6,83 @@ Release notes Scrapy 1.6.0 (unreleased) ------------------------- -Highlights for this release: +Highlights: -* better Windows compatibility; +* better Windows support; * Python 3.7 compatibility; * big documentation improvements, including a switch - from ``.extract() / .extract_first()`` API to ``.get() / .getall()`` API; -* Feed exports, FilePipeline and MediaPipeline improvements; + from ``.extract()`` + ``.extract_first()`` API to ``.get()`` + ``.getall()`` + API; +* feed exports, FilePipeline and MediaPipeline improvements; +* better extensibility: :signal:`item_error` and + :signal:`request_reached_downloader` signals; ``from_crawler`` support + for feed exporters, feed storages and dupefilters. * ``scrapy.contracts`` fixes and new features; -* large clean-up of deprecated code -* TODO +* telnet console security improvements; +* clean-up of the deprecated code; +* various bug fixes, small new features and usability improvements across + the codebase. -parsel 1.5 -~~~~~~~~~~ +Selector API changes +~~~~~~~~~~~~~~~~~~~~ -TODO -While this is not a change in Scrapy itself, a new version of ``parsel`` -is released; Scrapy now depends on ``parsel >= 1.5``. +While these are not changes in Scrapy itself, but rather in the parsel_ +library which Scrapy uses for xpath/css selectors, these changes are +worth mentioning here. Scrapy now depends on parsel >= 1.5, and +Scrapy documentation is updated to follow recent ``parsel`` API conventions. -Feed export improvements -~~~~~~~~~~~~~~~~~~~~~~~~ +Most visible change is that ``.get()`` and ``.getall()`` selector +methods are now preferred over ``.extract()`` and ``.extract_first()``. +We feel that these new methods result in a more concise and readable code. +See :ref:`old-extraction-api` for more details. + +.. note:: + There are currently **no plans** to deprecate ``.extract()`` + and ``.extract_first()`` methods. + +Another useful new feature is the introduction of ``Selector.attrib`` and +``SelectorList.attrib`` properties, which make it easier to get +attributes of HTML elements. See :ref:`selecting-attributes`. + +CSS selectors are cached in parsel >= 1.5, which makes them faster +when the same CSS path is used many times. This is very common in +case of Scrapy spiders: callbacks are usually called several times, +on different pages. + +If you're using custom ``Selector`` or ``SelectorList`` subclasses, +a **backwards incompatible** change in parsel may affect your code. +See `parsel changelog`_ for a detailed description, as well as for the +full list of improvements. + +.. _parsel changelog: https://parsel.readthedocs.io/en/latest/history.html + +Telnet console +~~~~~~~~~~~~~~ + +**Backwards incompatible**: Scrapy's telnet console now requires username +and password. See :ref:`topics-telnetconsole` for more details. + +New extensibility features +~~~~~~~~~~~~~~~~~~~~~~~~~~ * ``from_crawler`` support is added to feed exporters and feed storages. This, - among other things, allow to access Scrapy settings from custom storages - and exporters (:issue:`1605`, :issue:`3348`). -* fixed issue with extra blank lines in .csv exports under Windows - (:issue:`3039`); -* better error message when an exporter is disabled (:issue:`3358`); + among other things, allows to access Scrapy settings from custom feed + storages and exporters (:issue:`1605`, :issue:`3348`). +* ``from_crawler`` support is added to dupefilters (:issue:`2956`); this allows + to access e.g. settings or a spider from a dupefilter. +* :signal:`item_error` is fired when an error happens in a pipeline + (:issue:`3256`); +* :signal:`request_reached_downloader` is fired when Downloader gets + a new Request; this signal can be useful e.g. for custom Schedulers + (:issue:`3393`). -FilePipeline and MediaPipeline improvements +New FilePipeline and MediaPipeline features ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ * Expose more options for S3FilesStore: :setting:`AWS_ENDPOINT_URL`, :setting:`AWS_USE_SSL`, :setting:`AWS_VERIFY`, :setting:`AWS_REGION_NAME`. For example, this allows to use alternative or self-hosted - AWS-compatible providers (:issue:`2609`). + AWS-compatible providers (:issue:`2609`, :issue:`3548`). * ACL support for Google Cloud Storage: :setting:`FILES_STORE_GCS_ACL` and :setting:`IMAGES_STORE_GCS_ACL` (:issue:`3199`). @@ -55,6 +97,47 @@ FilePipeline and MediaPipeline improvements * Fixed errback handling in contracts, e.g. for cases where a contract is executed for URL which returns non-200 response (:issue:`3371`). +Usability and other improvements, cleanups +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +* All Scrapy tests now pass on Windows; Scrapy testing suite is executed + in a Windows environment on CI (:issue:`3315`). +* Python 3.7 support (:issue:`3326`, :issue:`3150`, :issue:`3547`). +* Lazy loading of Downloader Handlers is now optional; this enables better + initialization error handling in custom Downloader Handlers (:issue:`3394`). +* Testing and CI fixes (:issue:`3526`, :issue:`3538`, :issue:`3308`, + :issue:`3311`, :issue:`3309`, :issue:`3305`, :issue:`3210`, :issue:`3299`) +* better error message when an exporter is disabled (:issue:`3358`); +* ``scrapy.http.cookies.CookieJar.clear`` accepts "domain", "path" and "name" + optional arguments (:issue:`3231`). +* more stats for RobotsTxtMiddleware (:issue:`3100`) +* INFO log level is used to show telnet host/port (:issue:`3115`) +* a message is added to IgnoreRequest in RobotsTxtMiddleware (:issue:`3113`) +* better validation of ``url`` argument in ``Response.follow`` (:issue:`3131`) +* non-zero exit code is returned from Scrapy commands when error happens + on spider inititalization (:issue:`3226`); +* link extraction improvements: "ftp" is added to scheme list (:issue:`3152`); + "flv" is added to common video extensions (:issue:`3165`) +* `scrapy shell --help` mentions syntax required for local files + (``./file.html``) - :issue:`3496`. +* additional files are included to sdist (:issue:`3495`); +* code style fixes (:issue:`3405`, :issue:`3304`); +* unneeded .strip() call is removed (:issue:`3519`); +* collections.deque is used to store MiddlewareManager methods instead + of a list (:issue:`3476`) + +Bug fixes +~~~~~~~~~ + +* fixed issue with extra blank lines in .csv exports under Windows + (:issue:`3039`); +* proper handling of pickling errors in Python 3 when serializing objects + for disk queues (:issue:`3082`) +* flags are now preserved when copying Requests (:issue:`3342`); +* FormRequest.from_response clickdata shouldn't ignore elements with + ``input[type=image]`` (:issue:`3153`). +* FormRequest.from_response should preserve duplicate keys (:issue:`3247`) + Documentation improvements ~~~~~~~~~~~~~~~~~~~~~~~~~~ @@ -73,21 +156,6 @@ Documentation improvements * remove unused `DEPTH_STATS` option from docs (:issue:`3245`); * other cleanups (:issue:`3347`, :issue:`3350`, :issue:`3445`). -Better Windows support -~~~~~~~~~~~~~~~~~~~~~~ - -* All Scrapy tests now pass on Windows; Scrapy testing suite is executed - in a Windows environment on CI (:issue:`3315`). -* Scrapy used to produce unnecessary blank lines in .csv exports on Windows, - this is fixed (:issue:`3039`). - -Testing fixes -~~~~~~~~~~~~~ - -* Python 3.7 support (:issue:`3326`, :issue:`3150`, :issue:`3547`) -* Testing and CI fixes (:issue:`3526`, :issue:`3538`, :issue:`3308`, - :issue:`3311`, :issue:`3309`, :issue:`3305`, :issue:`3210`, :issue:`3299`) - Deprecation removals ~~~~~~~~~~~~~~~~~~~~ @@ -107,7 +175,7 @@ Compatibility shims for pre-1.0 Scrapy module names are removed * ``scrapy.statscol`` * ``scrapy.utils.decorator`` -See :ref:`module_relocations` for more information, or use suggestions +See :ref:`module-relocations` for more information, or use suggestions from Scrapy 1.5.x deprecation warnings to update your code. Other deprecation removals: @@ -1225,7 +1293,7 @@ until it reaches a stable status. See more examples for scripts running Scrapy: :ref:`topics-practices` -.. _module_relocations: +.. _module-relocations: Module Relocations ~~~~~~~~~~~~~~~~~~ From 638469f9efdcc104f7b1a1c1a9890694e0d41c68 Mon Sep 17 00:00:00 2001 From: Mikhail Korobov Date: Fri, 28 Dec 2018 01:13:01 +0500 Subject: [PATCH 230/889] DOC extract_first/extract matches get/getall better Thanks @Gallaecio! --- docs/news.rst | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/docs/news.rst b/docs/news.rst index bf469a350..4a236f1b9 100644 --- a/docs/news.rst +++ b/docs/news.rst @@ -11,7 +11,7 @@ Highlights: * better Windows support; * Python 3.7 compatibility; * big documentation improvements, including a switch - from ``.extract()`` + ``.extract_first()`` API to ``.get()`` + ``.getall()`` + from ``.extract_first()`` + ``.extract()`` API to ``.get()`` + ``.getall()`` API; * feed exports, FilePipeline and MediaPipeline improvements; * better extensibility: :signal:`item_error` and @@ -32,7 +32,7 @@ worth mentioning here. Scrapy now depends on parsel >= 1.5, and Scrapy documentation is updated to follow recent ``parsel`` API conventions. Most visible change is that ``.get()`` and ``.getall()`` selector -methods are now preferred over ``.extract()`` and ``.extract_first()``. +methods are now preferred over ``.extract_first()`` and ``.extract()``. We feel that these new methods result in a more concise and readable code. See :ref:`old-extraction-api` for more details. From 4cf4dd1d3e068e0df32f700c89d833cc7cd79b85 Mon Sep 17 00:00:00 2001 From: Mikhail Korobov Date: Wed, 30 Jan 2019 03:08:17 +0500 Subject: [PATCH 231/889] DOC add recent changes to changelog --- docs/news.rst | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/docs/news.rst b/docs/news.rst index 4a236f1b9..1a08f93ec 100644 --- a/docs/news.rst +++ b/docs/news.rst @@ -75,6 +75,9 @@ New extensibility features * :signal:`request_reached_downloader` is fired when Downloader gets a new Request; this signal can be useful e.g. for custom Schedulers (:issue:`3393`). +* new SitemapSpider :meth:`~.SitemapSpider.sitemap_filter` method which allows + to select sitemap entries based on their attributes in SitemapSpider + subclasses (:issue:`3512`). New FilePipeline and MediaPipeline features ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ @@ -125,6 +128,7 @@ Usability and other improvements, cleanups * unneeded .strip() call is removed (:issue:`3519`); * collections.deque is used to store MiddlewareManager methods instead of a list (:issue:`3476`) +* Referer header value is added to RFPDupeFilter log messages (:issue:`3588`) Bug fixes ~~~~~~~~~ @@ -154,7 +158,8 @@ Documentation improvements (:issue:`3367`, :issue:`3468`); * fixed :setting:`RETRY_HTTP_CODES` default values in docs (:issue:`3335`); * remove unused `DEPTH_STATS` option from docs (:issue:`3245`); -* other cleanups (:issue:`3347`, :issue:`3350`, :issue:`3445`). +* other cleanups (:issue:`3347`, :issue:`3350`, :issue:`3445`, :issue:`3544`, + :issue:`3605`). Deprecation removals ~~~~~~~~~~~~~~~~~~~~ From 0fc9d705c271f5d87174143c09f95993e5a45797 Mon Sep 17 00:00:00 2001 From: Mikhail Korobov Date: Wed, 30 Jan 2019 03:28:19 +0500 Subject: [PATCH 232/889] DOC mention that telnet security improvements happened in 1.5.2 --- docs/news.rst | 45 ++++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 44 insertions(+), 1 deletion(-) diff --git a/docs/news.rst b/docs/news.rst index 1a08f93ec..a4f07efad 100644 --- a/docs/news.rst +++ b/docs/news.rst @@ -3,6 +3,8 @@ Release notes ============= +.. _release-1.6.0: + Scrapy 1.6.0 (unreleased) ------------------------- @@ -18,11 +20,13 @@ Highlights: :signal:`request_reached_downloader` signals; ``from_crawler`` support for feed exporters, feed storages and dupefilters. * ``scrapy.contracts`` fixes and new features; -* telnet console security improvements; +* telnet console security improvements, first released as a + backport in :ref:`release-1.5.2`; * clean-up of the deprecated code; * various bug fixes, small new features and usability improvements across the codebase. + Selector API changes ~~~~~~~~~~~~~~~~~~~~ @@ -230,6 +234,8 @@ Cleanups * additional files are included to sdist (:issue:`3495`); * code style fixes (:issue:`3405`, :issue:`3304`) +.. _release-1.5.2: + Scrapy 1.5.2 (2019-01-22) ------------------------- @@ -247,6 +253,8 @@ Scrapy 1.5.2 (2019-01-22) * Backport CI build failure under GCE environemnt due to boto import error. +.. _release-1.5.1: + Scrapy 1.5.1 (2018-07-12) ------------------------- @@ -262,6 +270,9 @@ This is a maintenance release with important bug fixes, but no new features: :issue:`3279`, :issue:`3201`, :issue:`3260`, :issue:`3284`, :issue:`3298`, :issue:`3294`). + +.. _release-1.5.0: + Scrapy 1.5.0 (2017-12-29) ------------------------- @@ -373,6 +384,7 @@ Docs - Document ``from_crawler`` methods for spider and downloader middlewares (:issue:`3019`) +.. _release-1.4.0: Scrapy 1.4.0 (2017-05-18) ------------------------- @@ -559,6 +571,8 @@ Documentation - Clarify ``allowed_domains`` example (:issue:`2670`) +.. _release-1.3.3: + Scrapy 1.3.3 (2017-03-10) ------------------------- @@ -571,6 +585,7 @@ Bug fixes A new setting is introduced to toggle between warning or exception if needed ; see :setting:`SPIDER_LOADER_WARN_ONLY` for details. +.. _release-1.3.2: Scrapy 1.3.2 (2017-02-13) ------------------------- @@ -582,6 +597,8 @@ Bug fixes - Use consistent selectors for author field in tutorial (:issue:`2551`). - Fix TLS compatibility in Twisted 17+ (:issue:`2558`) +.. _release-1.3.1: + Scrapy 1.3.1 (2017-02-08) ------------------------- @@ -630,6 +647,8 @@ Cleanups - Remove dead code supporting old Twisted versions (:issue:`2544`). +.. _release-1.3.0: + Scrapy 1.3.0 (2016-12-21) ------------------------- @@ -669,6 +688,7 @@ Dependencies & Cleanups - ``ChunkedTransferMiddleware`` is deprecated and removed from the default downloader middlewares. +.. _release-1.2.3: Scrapy 1.2.3 (2017-03-03) ------------------------- @@ -676,6 +696,8 @@ Scrapy 1.2.3 (2017-03-03) - Packaging fix: disallow unsupported Twisted versions in setup.py +.. _release-1.2.2: + Scrapy 1.2.2 (2016-12-06) ------------------------- @@ -711,6 +733,8 @@ Other changes .. _conda-forge: https://anaconda.org/conda-forge/scrapy +.. _release-1.2.1: + Scrapy 1.2.1 (2016-10-21) ------------------------- @@ -735,6 +759,8 @@ Other changes - Removed ``www.`` from ``start_urls`` in built-in spider templates (:issue:`2299`). +.. _release-1.2.0: + Scrapy 1.2.0 (2016-10-03) ------------------------- @@ -803,12 +829,14 @@ Documentation - Reworded misleading :setting:`RANDOMIZE_DOWNLOAD_DELAY` description (:issue:`2190`). - Add StackOverflow as a support channel (:issue:`2257`). +.. _release-1.1.4: Scrapy 1.1.4 (2017-03-03) ------------------------- - Packaging fix: disallow unsupported Twisted versions in setup.py +.. _release-1.1.3: Scrapy 1.1.3 (2016-09-22) ------------------------- @@ -826,6 +854,7 @@ Documentation rewritten to use http://toscrape.com websites (:issue:`2236`, :issue:`2249`, :issue:`2252`). +.. _release-1.1.2: Scrapy 1.1.2 (2016-08-18) ------------------------- @@ -840,6 +869,7 @@ Bug fixes - :setting:`IMAGES_EXPIRES` default value set back to 90 (the regression was introduced in 1.1.1) +.. _release-1.1.1: Scrapy 1.1.1 (2016-07-13) ------------------------- @@ -892,6 +922,7 @@ Tests - Upgrade py.test requirement on Travis CI and Pin pytest-cov to 2.2.1 (:issue:`2095`) +.. _release-1.1.0: Scrapy 1.1.0 (2016-05-11) ------------------------- @@ -1081,12 +1112,14 @@ Bugfixes - HTTPS+CONNECT tunnels could get mixed up when using multiple proxies to same remote host (:issue:`1912`). +.. _release-1.0.7: Scrapy 1.0.7 (2017-03-03) ------------------------- - Packaging fix: disallow unsupported Twisted versions in setup.py +.. _release-1.0.6: Scrapy 1.0.6 (2016-05-04) ------------------------- @@ -1096,6 +1129,7 @@ Scrapy 1.0.6 (2016-05-04) - DOC: Support for Sphinx 1.4+ (:issue:`1893`) - DOC: Consistency in selectors examples (:issue:`1869`) +.. _release-1.0.5: Scrapy 1.0.5 (2016-02-04) ------------------------- @@ -1105,6 +1139,7 @@ Scrapy 1.0.5 (2016-02-04) - DOC: Fixed typos in tutorial and media-pipeline (:commit:`808a9ea` and :commit:`803bd87`) - DOC: Add AjaxCrawlMiddleware to DOWNLOADER_MIDDLEWARES_BASE in settings docs (:commit:`aa94121`) +.. _release-1.0.4: Scrapy 1.0.4 (2015-12-30) ------------------------- @@ -1158,12 +1193,16 @@ Scrapy 1.0.4 (2015-12-30) - Small grammatical change (:commit:`8752294`) - Add openssl version to version command (:commit:`13c45ac`) +.. _release-1.0.3: + Scrapy 1.0.3 (2015-08-11) ------------------------- - add service_identity to scrapy install_requires (:commit:`cbc2501`) - Workaround for travis#296 (:commit:`66af9cd`) +.. _release-1.0.2: + Scrapy 1.0.2 (2015-08-06) ------------------------- @@ -1174,6 +1213,8 @@ Scrapy 1.0.2 (2015-08-06) - Fixed typos (:commit:`a9ae7b0`) - Fix doc reference. (:commit:`7c8a4fe`) +.. _release-1.0.1: + Scrapy 1.0.1 (2015-07-01) ------------------------- @@ -1184,6 +1225,8 @@ Scrapy 1.0.1 (2015-07-01) - DOC remove version suffix from ubuntu package (:commit:`5303c66`) - DOC Update release date for 1.0 (:commit:`c89fa29`) +.. _release-1.0.0: + Scrapy 1.0.0 (2015-06-19) ------------------------- From 2c8c8b2dd8683787826713ed1d0fbfb2ec1af04a Mon Sep 17 00:00:00 2001 From: Mikhail Korobov Date: Wed, 30 Jan 2019 17:30:13 +0500 Subject: [PATCH 233/889] DOC fix after bad merge - remove duplicate entries in changelog --- docs/news.rst | 72 +++++++++++++-------------------------------------- 1 file changed, 18 insertions(+), 54 deletions(-) diff --git a/docs/news.rst b/docs/news.rst index a4f07efad..4711d2f35 100644 --- a/docs/news.rst +++ b/docs/news.rst @@ -26,7 +26,6 @@ Highlights: * various bug fixes, small new features and usability improvements across the codebase. - Selector API changes ~~~~~~~~~~~~~~~~~~~~ @@ -82,6 +81,8 @@ New extensibility features * new SitemapSpider :meth:`~.SitemapSpider.sitemap_filter` method which allows to select sitemap entries based on their attributes in SitemapSpider subclasses (:issue:`3512`). +* Lazy loading of Downloader Handlers is now optional; this enables better + initialization error handling in custom Downloader Handlers (:issue:`3394`). New FilePipeline and MediaPipeline features ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ @@ -104,34 +105,20 @@ New FilePipeline and MediaPipeline features * Fixed errback handling in contracts, e.g. for cases where a contract is executed for URL which returns non-200 response (:issue:`3371`). -Usability and other improvements, cleanups -~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +Usability improvements +~~~~~~~~~~~~~~~~~~~~~~ -* All Scrapy tests now pass on Windows; Scrapy testing suite is executed - in a Windows environment on CI (:issue:`3315`). -* Python 3.7 support (:issue:`3326`, :issue:`3150`, :issue:`3547`). -* Lazy loading of Downloader Handlers is now optional; this enables better - initialization error handling in custom Downloader Handlers (:issue:`3394`). -* Testing and CI fixes (:issue:`3526`, :issue:`3538`, :issue:`3308`, - :issue:`3311`, :issue:`3309`, :issue:`3305`, :issue:`3210`, :issue:`3299`) -* better error message when an exporter is disabled (:issue:`3358`); -* ``scrapy.http.cookies.CookieJar.clear`` accepts "domain", "path" and "name" - optional arguments (:issue:`3231`). * more stats for RobotsTxtMiddleware (:issue:`3100`) * INFO log level is used to show telnet host/port (:issue:`3115`) * a message is added to IgnoreRequest in RobotsTxtMiddleware (:issue:`3113`) * better validation of ``url`` argument in ``Response.follow`` (:issue:`3131`) * non-zero exit code is returned from Scrapy commands when error happens - on spider inititalization (:issue:`3226`); -* link extraction improvements: "ftp" is added to scheme list (:issue:`3152`); + on spider inititalization (:issue:`3226`) +* Link extraction improvements: "ftp" is added to scheme list (:issue:`3152`); "flv" is added to common video extensions (:issue:`3165`) +* better error message when an exporter is disabled (:issue:`3358`); * `scrapy shell --help` mentions syntax required for local files (``./file.html``) - :issue:`3496`. -* additional files are included to sdist (:issue:`3495`); -* code style fixes (:issue:`3405`, :issue:`3304`); -* unneeded .strip() call is removed (:issue:`3519`); -* collections.deque is used to store MiddlewareManager methods instead - of a list (:issue:`3476`) * Referer header value is added to RFPDupeFilter log messages (:issue:`3588`) Bug fixes @@ -195,44 +182,21 @@ Other deprecation removals: * Deprecated ``Settings.overrides`` and ``Settings.defaults`` attributes are removed (:issue:`3327`, :issue:`3359`). -Internal improvements -~~~~~~~~~~~~~~~~~~~~~ +Other improvements, cleanups +~~~~~~~~~~~~~~~~~~~~~~~~~~~~ -* ``from_crawler`` support is added to dupefilters (:issue:`2956`); this allows - to access e.g. settings or a spider from a dupefilter. -* :signal:`item_error` is fired when an error happens in a pipeline - (:issue:`3256`); -* :signal:`request_reached_downloader` is fired when Downloader gets - a new Request; this signal can be useful e.g. for custom Schedulers - (:issue:`3393`). +* All Scrapy tests now pass on Windows; Scrapy testing suite is executed + in a Windows environment on CI (:issue:`3315`). +* Python 3.7 support (:issue:`3326`, :issue:`3150`, :issue:`3547`). +* Testing and CI fixes (:issue:`3526`, :issue:`3538`, :issue:`3308`, + :issue:`3311`, :issue:`3309`, :issue:`3305`, :issue:`3210`, :issue:`3299`) * ``scrapy.http.cookies.CookieJar.clear`` accepts "domain", "path" and "name" optional arguments (:issue:`3231`). - -Usability improvements -~~~~~~~~~~~~~~~~~~~~~~ - -* more stats for RobotsTxtMiddleware (:issue:`3100`) -* INFO log level is used to show telnet host/port (:issue:`3115`) -* a message is added to IgnoreRequest in RobotsTxtMiddleware (:issue:`3113`) -* better validation of ``url`` argument in ``Response.follow`` (:issue:`3131`) -* non-zero exit code is returned from Scrapy commands when error happens - on spider inititalization (:issue:`3226`) -* Link extraction improvements: "ftp" is added to scheme list (:issue:`3152`); - "flv" is added to common video extensions (:issue:`3165`) - -Bug fixes -~~~~~~~~~ -* proper handling of pickling errors in Python 3 when serializing objects - for disk queues (:issue:`3082`) -* flags are now preserved when copying Requests (:issue:`3342`); -* FormRequest.from_response clickdata shouldn't ignore elements with - ``input[type=image]`` (:issue:`3153`). -* FormRequest.from_response should preserve duplicate keys (:issue:`3247`) - -Cleanups -~~~~~~~~ * additional files are included to sdist (:issue:`3495`); -* code style fixes (:issue:`3405`, :issue:`3304`) +* code style fixes (:issue:`3405`, :issue:`3304`); +* unneeded .strip() call is removed (:issue:`3519`); +* collections.deque is used to store MiddlewareManager methods instead + of a list (:issue:`3476`) .. _release-1.5.2: From 91791cd329936ee6ac53523460f9b72c20c66afb Mon Sep 17 00:00:00 2001 From: Mikhail Korobov Date: Wed, 30 Jan 2019 17:53:58 +0500 Subject: [PATCH 234/889] DOC final changelog cleanups --- docs/news.rst | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/docs/news.rst b/docs/news.rst index 4711d2f35..543901809 100644 --- a/docs/news.rst +++ b/docs/news.rst @@ -63,7 +63,8 @@ Telnet console ~~~~~~~~~~~~~~ **Backwards incompatible**: Scrapy's telnet console now requires username -and password. See :ref:`topics-telnetconsole` for more details. +and password. See :ref:`topics-telnetconsole` for more details. This change +fixes a **security issue**; see :ref:`release-1.5.2` release notes for details. New extensibility features ~~~~~~~~~~~~~~~~~~~~~~~~~~ @@ -117,7 +118,7 @@ Usability improvements * Link extraction improvements: "ftp" is added to scheme list (:issue:`3152`); "flv" is added to common video extensions (:issue:`3165`) * better error message when an exporter is disabled (:issue:`3358`); -* `scrapy shell --help` mentions syntax required for local files +* ``scrapy shell --help`` mentions syntax required for local files (``./file.html``) - :issue:`3496`. * Referer header value is added to RFPDupeFilter log messages (:issue:`3588`) From b8594353d03be5574f51766c35566b713584302b Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Daniel=20Gra=C3=B1a?= Date: Wed, 30 Jan 2019 18:00:40 -0300 Subject: [PATCH 235/889] =?UTF-8?q?Bump=20version:=201.5.0=20=E2=86=92=201?= =?UTF-8?q?.6.0?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- .bumpversion.cfg | 2 +- scrapy/VERSION | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/.bumpversion.cfg b/.bumpversion.cfg index 6e7be142e..8cecb7ad4 100644 --- a/.bumpversion.cfg +++ b/.bumpversion.cfg @@ -1,5 +1,5 @@ [bumpversion] -current_version = 1.5.0 +current_version = 1.6.0 commit = True tag = True tag_name = {new_version} diff --git a/scrapy/VERSION b/scrapy/VERSION index bc80560fa..dc1e644a1 100644 --- a/scrapy/VERSION +++ b/scrapy/VERSION @@ -1 +1 @@ -1.5.0 +1.6.0 From 88326cd8be7f9c9f09924144a4d3a9666fdcf0b8 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Daniel=20Gra=C3=B1a?= Date: Thu, 31 Jan 2019 01:16:28 -0300 Subject: [PATCH 236/889] Set release date to 1.6.0 --- docs/news.rst | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/docs/news.rst b/docs/news.rst index 543901809..668473887 100644 --- a/docs/news.rst +++ b/docs/news.rst @@ -5,7 +5,7 @@ Release notes .. _release-1.6.0: -Scrapy 1.6.0 (unreleased) +Scrapy 1.6.0 (2019-01-30) ------------------------- Highlights: From 65d631329a1434ec013f24341e4b8520241aec70 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Daniel=20Gra=C3=B1a?= Date: Thu, 31 Jan 2019 01:28:53 -0300 Subject: [PATCH 237/889] Be consistent with domain used for links to documentation website --- CONTRIBUTING.md | 2 +- INSTALL | 2 +- README.rst | 8 ++++---- docs/contributing.rst | 2 +- docs/topics/selectors.rst | 4 ++-- scrapy/extensions/telnet.py | 2 +- scrapy/templates/project/module/items.py.tmpl | 2 +- .../project/module/middlewares.py.tmpl | 2 +- .../project/module/pipelines.py.tmpl | 2 +- .../templates/project/module/settings.py.tmpl | 20 +++++++++---------- sep/sep-001.rst | 2 +- sep/sep-006.rst | 4 ++-- tests/__init__.py | 2 +- 13 files changed, 27 insertions(+), 27 deletions(-) diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md index 0a11b05d2..a05d07aee 100644 --- a/CONTRIBUTING.md +++ b/CONTRIBUTING.md @@ -1,5 +1,5 @@ The guidelines for contributing are available here: -https://doc.scrapy.org/en/master/contributing.html +https://docs.scrapy.org/en/master/contributing.html Please do not abuse the issue tracker for support questions. If your issue topic can be rephrased to "How to ...?", please use the diff --git a/INSTALL b/INSTALL index a3c7899c6..06e812936 100644 --- a/INSTALL +++ b/INSTALL @@ -1,4 +1,4 @@ For information about installing Scrapy see: * docs/intro/install.rst (local file) -* https://doc.scrapy.org/en/latest/intro/install.html (online version) +* https://docs.scrapy.org/en/latest/intro/install.html (online version) diff --git a/README.rst b/README.rst index 1361eac26..c28d217ff 100644 --- a/README.rst +++ b/README.rst @@ -51,18 +51,18 @@ The quick way:: pip install scrapy For more details see the install section in the documentation: -https://doc.scrapy.org/en/latest/intro/install.html +https://docs.scrapy.org/en/latest/intro/install.html Documentation ============= -Documentation is available online at https://doc.scrapy.org/ and in the ``docs`` +Documentation is available online at https://docs.scrapy.org/ and in the ``docs`` directory. Releases ======== -You can find release notes at https://doc.scrapy.org/en/latest/news.html +You can find release notes at https://docs.scrapy.org/en/latest/news.html Community (blog, twitter, mail list, IRC) ========================================= @@ -72,7 +72,7 @@ See https://scrapy.org/community/ Contributing ============ -See https://doc.scrapy.org/en/master/contributing.html +See https://docs.scrapy.org/en/master/contributing.html Code of Conduct --------------- diff --git a/docs/contributing.rst b/docs/contributing.rst index 2369c3436..cf27337c8 100644 --- a/docs/contributing.rst +++ b/docs/contributing.rst @@ -7,7 +7,7 @@ Contributing to Scrapy .. important:: Double check that you are reading the most recent version of this document at - https://doc.scrapy.org/en/master/contributing.html + https://docs.scrapy.org/en/master/contributing.html There are many ways to contribute to Scrapy. Here are some of them: diff --git a/docs/topics/selectors.rst b/docs/topics/selectors.rst index 9dced7473..df1d67ae8 100644 --- a/docs/topics/selectors.rst +++ b/docs/topics/selectors.rst @@ -100,7 +100,7 @@ To explain how to use the selectors we'll use the `Scrapy shell` (which provides interactive testing) and an example page located in the Scrapy documentation server: - https://doc.scrapy.org/en/latest/_static/selectors-sample1.html + https://docs.scrapy.org/en/latest/_static/selectors-sample1.html .. _topics-selectors-htmlcode: @@ -113,7 +113,7 @@ For the sake of completeness, here's its full HTML code: First, let's open the shell:: - scrapy shell https://doc.scrapy.org/en/latest/_static/selectors-sample1.html + scrapy shell https://docs.scrapy.org/en/latest/_static/selectors-sample1.html Then, after the shell loads, you'll have the response available as ``response`` shell variable, and its attached selector in ``response.selector`` attribute. diff --git a/scrapy/extensions/telnet.py b/scrapy/extensions/telnet.py index dcf73eb88..26b214ee2 100644 --- a/scrapy/extensions/telnet.py +++ b/scrapy/extensions/telnet.py @@ -112,7 +112,7 @@ class TelnetConsole(protocol.ServerFactory): 'prefs': print_live_refs, 'hpy': hpy, 'help': "This is Scrapy telnet console. For more info see: " - "https://doc.scrapy.org/en/latest/topics/telnetconsole.html", + "https://docs.scrapy.org/en/latest/topics/telnetconsole.html", } self.crawler.signals.send_catch_log(update_telnet_vars, telnet_vars=telnet_vars) return telnet_vars diff --git a/scrapy/templates/project/module/items.py.tmpl b/scrapy/templates/project/module/items.py.tmpl index 7d766f4fc..a12d08414 100644 --- a/scrapy/templates/project/module/items.py.tmpl +++ b/scrapy/templates/project/module/items.py.tmpl @@ -3,7 +3,7 @@ # Define here the models for your scraped items # # See documentation in: -# https://doc.scrapy.org/en/latest/topics/items.html +# https://docs.scrapy.org/en/latest/topics/items.html import scrapy diff --git a/scrapy/templates/project/module/middlewares.py.tmpl b/scrapy/templates/project/module/middlewares.py.tmpl index c5b542bd6..5debe1cd2 100644 --- a/scrapy/templates/project/module/middlewares.py.tmpl +++ b/scrapy/templates/project/module/middlewares.py.tmpl @@ -3,7 +3,7 @@ # Define here the models for your spider middleware # # See documentation in: -# https://doc.scrapy.org/en/latest/topics/spider-middleware.html +# https://docs.scrapy.org/en/latest/topics/spider-middleware.html from scrapy import signals diff --git a/scrapy/templates/project/module/pipelines.py.tmpl b/scrapy/templates/project/module/pipelines.py.tmpl index e58dab089..fb641d447 100644 --- a/scrapy/templates/project/module/pipelines.py.tmpl +++ b/scrapy/templates/project/module/pipelines.py.tmpl @@ -3,7 +3,7 @@ # Define your item pipelines here # # Don't forget to add your pipeline to the ITEM_PIPELINES setting -# See: https://doc.scrapy.org/en/latest/topics/item-pipeline.html +# See: https://docs.scrapy.org/en/latest/topics/item-pipeline.html class ${ProjectName}Pipeline(object): diff --git a/scrapy/templates/project/module/settings.py.tmpl b/scrapy/templates/project/module/settings.py.tmpl index a0557473e..cb220eafc 100644 --- a/scrapy/templates/project/module/settings.py.tmpl +++ b/scrapy/templates/project/module/settings.py.tmpl @@ -5,9 +5,9 @@ # For simplicity, this file contains only settings considered important or # commonly used. You can find more settings consulting the documentation: # -# https://doc.scrapy.org/en/latest/topics/settings.html -# https://doc.scrapy.org/en/latest/topics/downloader-middleware.html -# https://doc.scrapy.org/en/latest/topics/spider-middleware.html +# https://docs.scrapy.org/en/latest/topics/settings.html +# https://docs.scrapy.org/en/latest/topics/downloader-middleware.html +# https://docs.scrapy.org/en/latest/topics/spider-middleware.html BOT_NAME = '$project_name' @@ -25,7 +25,7 @@ ROBOTSTXT_OBEY = True #CONCURRENT_REQUESTS = 32 # Configure a delay for requests for the same website (default: 0) -# See https://doc.scrapy.org/en/latest/topics/settings.html#download-delay +# See https://docs.scrapy.org/en/latest/topics/settings.html#download-delay # See also autothrottle settings and docs #DOWNLOAD_DELAY = 3 # The download delay setting will honor only one of: @@ -45,31 +45,31 @@ ROBOTSTXT_OBEY = True #} # Enable or disable spider middlewares -# See https://doc.scrapy.org/en/latest/topics/spider-middleware.html +# See https://docs.scrapy.org/en/latest/topics/spider-middleware.html #SPIDER_MIDDLEWARES = { # '$project_name.middlewares.${ProjectName}SpiderMiddleware': 543, #} # Enable or disable downloader middlewares -# See https://doc.scrapy.org/en/latest/topics/downloader-middleware.html +# See https://docs.scrapy.org/en/latest/topics/downloader-middleware.html #DOWNLOADER_MIDDLEWARES = { # '$project_name.middlewares.${ProjectName}DownloaderMiddleware': 543, #} # Enable or disable extensions -# See https://doc.scrapy.org/en/latest/topics/extensions.html +# See https://docs.scrapy.org/en/latest/topics/extensions.html #EXTENSIONS = { # 'scrapy.extensions.telnet.TelnetConsole': None, #} # Configure item pipelines -# See https://doc.scrapy.org/en/latest/topics/item-pipeline.html +# See https://docs.scrapy.org/en/latest/topics/item-pipeline.html #ITEM_PIPELINES = { # '$project_name.pipelines.${ProjectName}Pipeline': 300, #} # Enable and configure the AutoThrottle extension (disabled by default) -# See https://doc.scrapy.org/en/latest/topics/autothrottle.html +# See https://docs.scrapy.org/en/latest/topics/autothrottle.html #AUTOTHROTTLE_ENABLED = True # The initial download delay #AUTOTHROTTLE_START_DELAY = 5 @@ -82,7 +82,7 @@ ROBOTSTXT_OBEY = True #AUTOTHROTTLE_DEBUG = False # Enable and configure HTTP caching (disabled by default) -# See https://doc.scrapy.org/en/latest/topics/downloader-middleware.html#httpcache-middleware-settings +# See https://docs.scrapy.org/en/latest/topics/downloader-middleware.html#httpcache-middleware-settings #HTTPCACHE_ENABLED = True #HTTPCACHE_EXPIRATION_SECS = 0 #HTTPCACHE_DIR = 'httpcache' diff --git a/sep/sep-001.rst b/sep/sep-001.rst index 3766f38fc..2a66f9802 100644 --- a/sep/sep-001.rst +++ b/sep/sep-001.rst @@ -61,7 +61,7 @@ ItemForm -------- Pros: -- same API used for Items (see https://doc.scrapy.org/en/latest/topics/items.html) +- same API used for Items (see https://docs.scrapy.org/en/latest/topics/items.html) - some people consider setitem API more elegant than methods API Cons: diff --git a/sep/sep-006.rst b/sep/sep-006.rst index 7425c0930..366fcf033 100644 --- a/sep/sep-006.rst +++ b/sep/sep-006.rst @@ -16,7 +16,7 @@ Motivation ========== When you use Selectors in Scrapy, your final goal is to "extract" the data that -you've selected, as the [https://doc.scrapy.org/en/latest/topics/selectors.html +you've selected, as the [https://docs.scrapy.org/en/latest/topics/selectors.html XPath Selectors documentation] says (bolding by me): When you’re scraping web pages, the most common task you need to perform is @@ -71,5 +71,5 @@ webpage or set of pages. References ========== - 1. XPath Selectors (https://doc.scrapy.org/topics/selectors.html) + 1. XPath Selectors (https://docs.scrapy.org/topics/selectors.html) 2. XPath and XSLT with lxml (http://lxml.de/xpathxslt.html) diff --git a/tests/__init__.py b/tests/__init__.py index 55b1ecde8..a54367f8c 100644 --- a/tests/__init__.py +++ b/tests/__init__.py @@ -1,7 +1,7 @@ """ tests: this package contains all Scrapy unittests -see https://doc.scrapy.org/en/latest/contributing.html#running-tests +see https://docs.scrapy.org/en/latest/contributing.html#running-tests """ import os From 38af090f4d6799a0499b116a62c12509f59f561b Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Adri=C3=A1n=20Chaves?= Date: Mon, 4 Feb 2019 11:17:58 +0100 Subject: [PATCH 238/889] Indicate that users must implement their own authentication result check The example of form-based login could lead some users to think its authentication result check was final. See https://stackoverflow.com/a/54410966/939364 This change should make it more obvious that users are expected to implement their own logic to check whether authentication worked or not. --- docs/topics/request-response.rst | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/docs/topics/request-response.rst b/docs/topics/request-response.rst index e29914dbf..76360b15f 100644 --- a/docs/topics/request-response.rst +++ b/docs/topics/request-response.rst @@ -489,6 +489,11 @@ method for this job. Here's an example spider which uses it:: import scrapy + def authentication_failed(response): + # TODO: Check the contents of the response and return True if it failed + # or False if it succeeded. + pass + class LoginSpider(scrapy.Spider): name = 'example.com' start_urls = ['http://www.example.com/users/login.php'] @@ -501,8 +506,7 @@ method for this job. Here's an example spider which uses it:: ) def after_login(self, response): - # check login succeed before going on - if "authentication failed" in response.body: + if authentication_failed(response): self.logger.error("Login failed") return From 013568097db04396d780d1c91d37027115af7fe2 Mon Sep 17 00:00:00 2001 From: Victor Torres Date: Tue, 29 Jan 2019 11:10:06 -0300 Subject: [PATCH 239/889] add FEED_STORAGE_S3_ACL setting --- scrapy/extensions/feedexport.py | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/scrapy/extensions/feedexport.py b/scrapy/extensions/feedexport.py index 22ebf3b3f..eb0802261 100644 --- a/scrapy/extensions/feedexport.py +++ b/scrapy/extensions/feedexport.py @@ -118,6 +118,7 @@ class S3FeedStorage(BlockingFeedStorage): self.secret_key = u.password or secret_key self.is_botocore = is_botocore() self.keyname = u.path[1:] # remove first "/" + self.policy = settings.get('FEED_STORAGE_S3_ACL', 'private') if self.is_botocore: import botocore.session session = botocore.session.get_session() @@ -137,12 +138,13 @@ class S3FeedStorage(BlockingFeedStorage): file.seek(0) if self.is_botocore: self.s3_client.put_object( - Bucket=self.bucketname, Key=self.keyname, Body=file) + Bucket=self.bucketname, Key=self.keyname, Body=file, + ACL=self.policy) else: conn = self.connect_s3(self.access_key, self.secret_key) bucket = conn.get_bucket(self.bucketname, validate=False) key = bucket.new_key(self.keyname) - key.set_contents_from_file(file) + key.set_contents_from_file(file, policy=self.policy) key.close() From ad83ffdf1f4d69ffb62b243429e7b59d0930524c Mon Sep 17 00:00:00 2001 From: Victor Torres Date: Wed, 6 Feb 2019 18:32:46 -0200 Subject: [PATCH 240/889] refactoring --- scrapy/extensions/feedexport.py | 19 ++++++-- tests/test_feedexport.py | 84 +++++++++++++++++++++++++++++++++ 2 files changed, 98 insertions(+), 5 deletions(-) diff --git a/scrapy/extensions/feedexport.py b/scrapy/extensions/feedexport.py index eb0802261..ca30322be 100644 --- a/scrapy/extensions/feedexport.py +++ b/scrapy/extensions/feedexport.py @@ -93,7 +93,7 @@ class FileFeedStorage(object): class S3FeedStorage(BlockingFeedStorage): - def __init__(self, uri, access_key=None, secret_key=None): + def __init__(self, uri, access_key=None, secret_key=None, acl=None): # BEGIN Backwards compatibility for initialising without keys (and # without using from_crawler) no_defaults = access_key is None and secret_key is None @@ -118,7 +118,7 @@ class S3FeedStorage(BlockingFeedStorage): self.secret_key = u.password or secret_key self.is_botocore = is_botocore() self.keyname = u.path[1:] # remove first "/" - self.policy = settings.get('FEED_STORAGE_S3_ACL', 'private') + self.acl = acl if self.is_botocore: import botocore.session session = botocore.session.get_session() @@ -132,19 +132,28 @@ class S3FeedStorage(BlockingFeedStorage): @classmethod def from_crawler(cls, crawler, uri): return cls(uri, crawler.settings['AWS_ACCESS_KEY_ID'], - crawler.settings['AWS_SECRET_ACCESS_KEY']) + crawler.settings['AWS_SECRET_ACCESS_KEY'], + crawler.settings.get('FEED_STORAGE_S3_ACL')) def _store_in_thread(self, file): file.seek(0) if self.is_botocore: + kwargs = dict() + if self.acl: + kwargs.update(dict(ACL=self.acl)) + self.s3_client.put_object( Bucket=self.bucketname, Key=self.keyname, Body=file, - ACL=self.policy) + **kwargs) else: conn = self.connect_s3(self.access_key, self.secret_key) bucket = conn.get_bucket(self.bucketname, validate=False) key = bucket.new_key(self.keyname) - key.set_contents_from_file(file, policy=self.policy) + kwargs = dict() + if self.acl: + kwargs.update(dict(policy=self.acl)) + + key.set_contents_from_file(file, **kwargs) key.close() diff --git a/tests/test_feedexport.py b/tests/test_feedexport.py index e46c8c14e..b07635cb0 100644 --- a/tests/test_feedexport.py +++ b/tests/test_feedexport.py @@ -18,6 +18,7 @@ from tests import mock from tests.mockserver import MockServer from w3lib.url import path_to_file_uri +import botocore.client import scrapy from scrapy.exporters import CsvItemExporter from scrapy.extensions.feedexport import ( @@ -186,6 +187,89 @@ class S3FeedStorageTest(unittest.TestCase): content = get_s3_content_and_delete(u.hostname, u.path[1:]) self.assertEqual(content, expected_content) + def test_init_without_acl(self): + storage = S3FeedStorage( + 's3://mybucket/export.csv', + 'access_key', + 'secret_key' + ) + self.assertEqual(storage.access_key, 'access_key') + self.assertEqual(storage.secret_key, 'secret_key') + self.assertEqual(storage.acl, None) + + def test_init_with_acl(self): + storage = S3FeedStorage( + 's3://mybucket/export.csv', + 'access_key', + 'secret_key', + 'custom-acl' + ) + self.assertEqual(storage.access_key, 'access_key') + self.assertEqual(storage.secret_key, 'secret_key') + self.assertEqual(storage.acl, 'custom-acl') + + def test_from_crawler_without_acl(self): + settings = { + 'AWS_ACCESS_KEY_ID': 'access_key', + 'AWS_SECRET_ACCESS_KEY': 'secret_key', + } + crawler = get_crawler(settings_dict=settings) + storage = S3FeedStorage.from_crawler( + crawler, + 's3://mybucket/export.csv' + ) + self.assertEqual(storage.access_key, 'access_key') + self.assertEqual(storage.secret_key, 'secret_key') + self.assertEqual(storage.acl, None) + + def test_from_crawler_with_acl(self): + settings = { + 'AWS_ACCESS_KEY_ID': 'access_key', + 'AWS_SECRET_ACCESS_KEY': 'secret_key', + 'FEED_STORAGE_S3_ACL': 'custom-acl', + } + crawler = get_crawler(settings_dict=settings) + storage = S3FeedStorage.from_crawler( + crawler, + 's3://mybucket/export.csv' + ) + self.assertEqual(storage.access_key, 'access_key') + self.assertEqual(storage.secret_key, 'secret_key') + self.assertEqual(storage.acl, 'custom-acl') + + def test_store_in_thread_without_acl(self): + storage = S3FeedStorage( + 's3://mybucket/export.csv', + 'access_key', + 'secret_key', + ) + self.assertEqual(storage.access_key, 'access_key') + self.assertEqual(storage.secret_key, 'secret_key') + self.assertEqual(storage.acl, None) + + with mock.patch('botocore.client.BaseClient._make_api_call') as _make_api_call_mock: + storage._store_in_thread(BytesIO(b'test file')) + operation_name, api_params = _make_api_call_mock.call_args[0] + self.assertEqual(operation_name, 'PutObject') + self.assertNotIn('ACL', api_params) + + def test_store_in_thread_with_acl(self): + storage = S3FeedStorage( + 's3://mybucket/export.csv', + 'access_key', + 'secret_key', + 'custom-acl' + ) + self.assertEqual(storage.access_key, 'access_key') + self.assertEqual(storage.secret_key, 'secret_key') + self.assertEqual(storage.acl, 'custom-acl') + + with mock.patch('botocore.client.BaseClient._make_api_call') as _make_api_call_mock: + storage._store_in_thread(BytesIO(b'test file')) + operation_name, api_params = _make_api_call_mock.call_args[0] + self.assertEqual(operation_name, 'PutObject') + self.assertEqual(api_params.get('ACL'), 'custom-acl') + class StdoutFeedStorageTest(unittest.TestCase): From 126207fb7bca21d3d95ed9c66028e82771180370 Mon Sep 17 00:00:00 2001 From: Victor Torres Date: Wed, 6 Feb 2019 18:38:17 -0200 Subject: [PATCH 241/889] PEP8: use short name for mock method --- tests/test_feedexport.py | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/tests/test_feedexport.py b/tests/test_feedexport.py index b07635cb0..bfac06efc 100644 --- a/tests/test_feedexport.py +++ b/tests/test_feedexport.py @@ -247,9 +247,9 @@ class S3FeedStorageTest(unittest.TestCase): self.assertEqual(storage.secret_key, 'secret_key') self.assertEqual(storage.acl, None) - with mock.patch('botocore.client.BaseClient._make_api_call') as _make_api_call_mock: + with mock.patch('botocore.client.BaseClient._make_api_call') as m: storage._store_in_thread(BytesIO(b'test file')) - operation_name, api_params = _make_api_call_mock.call_args[0] + operation_name, api_params = m.call_args[0] self.assertEqual(operation_name, 'PutObject') self.assertNotIn('ACL', api_params) @@ -264,9 +264,9 @@ class S3FeedStorageTest(unittest.TestCase): self.assertEqual(storage.secret_key, 'secret_key') self.assertEqual(storage.acl, 'custom-acl') - with mock.patch('botocore.client.BaseClient._make_api_call') as _make_api_call_mock: + with mock.patch('botocore.client.BaseClient._make_api_call') as m: storage._store_in_thread(BytesIO(b'test file')) - operation_name, api_params = _make_api_call_mock.call_args[0] + operation_name, api_params = m.call_args[0] self.assertEqual(operation_name, 'PutObject') self.assertEqual(api_params.get('ACL'), 'custom-acl') From e0f34be383e361c75b22da59c97dee1db189937e Mon Sep 17 00:00:00 2001 From: Victor Torres Date: Wed, 6 Feb 2019 18:50:19 -0200 Subject: [PATCH 242/889] update docs --- docs/topics/feed-exports.rst | 19 ++++++++++++++++++- 1 file changed, 18 insertions(+), 1 deletion(-) diff --git a/docs/topics/feed-exports.rst b/docs/topics/feed-exports.rst index b64dbfbfd..661751ed9 100644 --- a/docs/topics/feed-exports.rst +++ b/docs/topics/feed-exports.rst @@ -185,6 +185,10 @@ passed through the following settings: * :setting:`AWS_ACCESS_KEY_ID` * :setting:`AWS_SECRET_ACCESS_KEY` +You can also define a custom ACL for exported objects using this setting: + + * :setting:`FEED_STORAGE_S3_ACL` + .. _topics-feed-storage-stdout: Standard output @@ -205,6 +209,7 @@ These are the settings used for configuring the feed exports: * :setting:`FEED_URI` (mandatory) * :setting:`FEED_FORMAT` * :setting:`FEED_STORAGES` + * :setting:`FEED_STORAGE_S3_ACL` * :setting:`FEED_EXPORTERS` * :setting:`FEED_STORE_EMPTY` * :setting:`FEED_EXPORT_ENCODING` @@ -302,11 +307,22 @@ Default: ``{}`` A dict containing additional feed storage backends supported by your project. The keys are URI schemes and the values are paths to storage classes. +.. setting:: FEED_STORAGE_S3_ACL + +FEED_STORAGE_S3_ACL +------------------- + +Default: ``None`` + +A string containing a custom ACL for feeds exported to Amazon S3 by your project. + +For a complete list of available values, access the `Canned ACL`_ section on Amazon S3 docs. + .. setting:: FEED_STORAGES_BASE FEED_STORAGES_BASE ------------------ - +` Default:: { @@ -366,3 +382,4 @@ format in :setting:`FEED_EXPORTERS`. E.g., to disable the built-in CSV exporter .. _Amazon S3: https://aws.amazon.com/s3/ .. _boto: https://github.com/boto/boto .. _botocore: https://github.com/boto/botocore +.. _Canned ACL: https://docs.aws.amazon.com/AmazonS3/latest/dev/acl-overview.html#canned-acl From 7b83ed7c5e1fcd81baf50db3a76f10ade7aa226e Mon Sep 17 00:00:00 2001 From: Victor Torres Date: Wed, 6 Feb 2019 18:52:24 -0200 Subject: [PATCH 243/889] remove typo --- docs/topics/feed-exports.rst | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/docs/topics/feed-exports.rst b/docs/topics/feed-exports.rst index 661751ed9..25979dfef 100644 --- a/docs/topics/feed-exports.rst +++ b/docs/topics/feed-exports.rst @@ -322,7 +322,7 @@ For a complete list of available values, access the `Canned ACL`_ section on Ama FEED_STORAGES_BASE ------------------ -` + Default:: { From e25b9a2323c169a4032ff07f912299b32de4b2e0 Mon Sep 17 00:00:00 2001 From: Victor Torres Date: Wed, 6 Feb 2019 18:52:39 -0200 Subject: [PATCH 244/889] calling it feeds instead of objects --- docs/topics/feed-exports.rst | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/docs/topics/feed-exports.rst b/docs/topics/feed-exports.rst index 25979dfef..dee0c3ffa 100644 --- a/docs/topics/feed-exports.rst +++ b/docs/topics/feed-exports.rst @@ -185,7 +185,7 @@ passed through the following settings: * :setting:`AWS_ACCESS_KEY_ID` * :setting:`AWS_SECRET_ACCESS_KEY` -You can also define a custom ACL for exported objects using this setting: +You can also define a custom ACL for exported feeds using this setting: * :setting:`FEED_STORAGE_S3_ACL` From dbeb088eea1713ac43f3d23579c36ece5f67563f Mon Sep 17 00:00:00 2001 From: Victor Torres Date: Thu, 7 Feb 2019 09:29:16 -0200 Subject: [PATCH 245/889] trying to fix jessie testenv by adding botocore to requirements and fixing its version --- tox.ini | 1 + 1 file changed, 1 insertion(+) diff --git a/tox.ini b/tox.ini index 0c0f8f7b7..f2f3e1293 100644 --- a/tox.ini +++ b/tox.ini @@ -47,6 +47,7 @@ deps = lxml==3.4.0 Twisted==14.0.2 boto==2.34.0 + botocore==1.12.89 Pillow==2.6.1 cssselect==0.9.1 zope.interface==4.1.1 From 079af889e7d010a79640e6874c3e6dc394b936ae Mon Sep 17 00:00:00 2001 From: Victor Torres Date: Thu, 7 Feb 2019 10:42:59 -0200 Subject: [PATCH 246/889] also testing without botocore --- tests/test_feedexport.py | 53 ++++++++++++++++++++++++++++++++++++++-- 1 file changed, 51 insertions(+), 2 deletions(-) diff --git a/tests/test_feedexport.py b/tests/test_feedexport.py index bfac06efc..520ca4a8f 100644 --- a/tests/test_feedexport.py +++ b/tests/test_feedexport.py @@ -237,7 +237,7 @@ class S3FeedStorageTest(unittest.TestCase): self.assertEqual(storage.secret_key, 'secret_key') self.assertEqual(storage.acl, 'custom-acl') - def test_store_in_thread_without_acl(self): + def test_store_in_thread_botocore_without_acl(self): storage = S3FeedStorage( 's3://mybucket/export.csv', 'access_key', @@ -253,7 +253,7 @@ class S3FeedStorageTest(unittest.TestCase): self.assertEqual(operation_name, 'PutObject') self.assertNotIn('ACL', api_params) - def test_store_in_thread_with_acl(self): + def test_store_in_thread_botocore_with_acl(self): storage = S3FeedStorage( 's3://mybucket/export.csv', 'access_key', @@ -270,6 +270,55 @@ class S3FeedStorageTest(unittest.TestCase): self.assertEqual(operation_name, 'PutObject') self.assertEqual(api_params.get('ACL'), 'custom-acl') + def test_store_in_thread_not_botocore_without_acl(self): + storage = S3FeedStorage( + 's3://mybucket/export.csv', + 'access_key', + 'secret_key', + ) + self.assertEqual(storage.access_key, 'access_key') + self.assertEqual(storage.secret_key, 'secret_key') + self.assertEqual(storage.acl, None) + + storage.is_botocore = False + storage.connect_s3 = mock.MagicMock() + self.assertFalse(storage.is_botocore) + + storage._store_in_thread(BytesIO(b'test file')) + + conn = storage.connect_s3(*storage.connect_s3.call_args) + bucket = conn.get_bucket(*conn.get_bucket.call_args) + key = bucket.new_key(*bucket.new_key.call_args) + self.assertNotIn( + dict(policy='custom-acl'), + key.set_contents_from_file.call_args + ) + + def test_store_in_thread_not_botocore_with_acl(self): + storage = S3FeedStorage( + 's3://mybucket/export.csv', + 'access_key', + 'secret_key', + 'custom-acl' + ) + self.assertEqual(storage.access_key, 'access_key') + self.assertEqual(storage.secret_key, 'secret_key') + self.assertEqual(storage.acl, 'custom-acl') + + storage.is_botocore = False + storage.connect_s3 = mock.MagicMock() + self.assertFalse(storage.is_botocore) + + storage._store_in_thread(BytesIO(b'test file')) + + conn = storage.connect_s3(*storage.connect_s3.call_args) + bucket = conn.get_bucket(*conn.get_bucket.call_args) + key = bucket.new_key(*bucket.new_key.call_args) + self.assertIn( + dict(policy='custom-acl'), + key.set_contents_from_file.call_args + ) + class StdoutFeedStorageTest(unittest.TestCase): From ceae356e62dc2e56465a58b3d9fe00813e289dd6 Mon Sep 17 00:00:00 2001 From: Victor Torres Date: Fri, 8 Feb 2019 11:47:35 -0200 Subject: [PATCH 247/889] add FEED_STORAGE_S3_ACL to default_settings.py file --- scrapy/settings/default_settings.py | 2 ++ 1 file changed, 2 insertions(+) diff --git a/scrapy/settings/default_settings.py b/scrapy/settings/default_settings.py index 3734a0a58..776c5af23 100644 --- a/scrapy/settings/default_settings.py +++ b/scrapy/settings/default_settings.py @@ -158,6 +158,8 @@ FEED_EXPORTERS_BASE = { } FEED_EXPORT_INDENT = 0 +FEED_STORAGE_S3_ACL = None + FILES_STORE_S3_ACL = 'private' FILES_STORE_GCS_ACL = '' From cfd183a9d19563f09487af942c9a635d665a1905 Mon Sep 17 00:00:00 2001 From: Victor Torres Date: Fri, 8 Feb 2019 14:49:26 -0200 Subject: [PATCH 248/889] no need to use get here since we're defining a default value in default_settings.py --- scrapy/extensions/feedexport.py | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/scrapy/extensions/feedexport.py b/scrapy/extensions/feedexport.py index ca30322be..2b4594ad8 100644 --- a/scrapy/extensions/feedexport.py +++ b/scrapy/extensions/feedexport.py @@ -133,7 +133,7 @@ class S3FeedStorage(BlockingFeedStorage): def from_crawler(cls, crawler, uri): return cls(uri, crawler.settings['AWS_ACCESS_KEY_ID'], crawler.settings['AWS_SECRET_ACCESS_KEY'], - crawler.settings.get('FEED_STORAGE_S3_ACL')) + crawler.settings['FEED_STORAGE_S3_ACL']) def _store_in_thread(self, file): file.seek(0) From f824f5b2d17b082dac04505ba27afdfa869a11c7 Mon Sep 17 00:00:00 2001 From: Victor Torres Date: Fri, 8 Feb 2019 15:19:57 -0200 Subject: [PATCH 249/889] testing public method store instead of private method _store_in_thread need to mock deferToThread function --- tests/test_feedexport.py | 36 ++++++++++++++++++++++++++++-------- 1 file changed, 28 insertions(+), 8 deletions(-) diff --git a/tests/test_feedexport.py b/tests/test_feedexport.py index 520ca4a8f..e8c32ea43 100644 --- a/tests/test_feedexport.py +++ b/tests/test_feedexport.py @@ -237,7 +237,7 @@ class S3FeedStorageTest(unittest.TestCase): self.assertEqual(storage.secret_key, 'secret_key') self.assertEqual(storage.acl, 'custom-acl') - def test_store_in_thread_botocore_without_acl(self): + def test_store_botocore_without_acl(self): storage = S3FeedStorage( 's3://mybucket/export.csv', 'access_key', @@ -247,13 +247,19 @@ class S3FeedStorageTest(unittest.TestCase): self.assertEqual(storage.secret_key, 'secret_key') self.assertEqual(storage.acl, None) + def _defer(f, *args, **kwargs): + return f(*args, **kwargs) + with mock.patch('botocore.client.BaseClient._make_api_call') as m: - storage._store_in_thread(BytesIO(b'test file')) + with mock.patch('twisted.internet.threads.deferToThread', + new=_defer): + storage.store(BytesIO(b'test file')) + operation_name, api_params = m.call_args[0] self.assertEqual(operation_name, 'PutObject') self.assertNotIn('ACL', api_params) - def test_store_in_thread_botocore_with_acl(self): + def test_store_botocore_with_acl(self): storage = S3FeedStorage( 's3://mybucket/export.csv', 'access_key', @@ -264,13 +270,19 @@ class S3FeedStorageTest(unittest.TestCase): self.assertEqual(storage.secret_key, 'secret_key') self.assertEqual(storage.acl, 'custom-acl') + def _defer(f, *args, **kwargs): + return f(*args, **kwargs) + with mock.patch('botocore.client.BaseClient._make_api_call') as m: - storage._store_in_thread(BytesIO(b'test file')) + with mock.patch('twisted.internet.threads.deferToThread', + new=_defer): + storage.store(BytesIO(b'test file')) + operation_name, api_params = m.call_args[0] self.assertEqual(operation_name, 'PutObject') self.assertEqual(api_params.get('ACL'), 'custom-acl') - def test_store_in_thread_not_botocore_without_acl(self): + def test_store_not_botocore_without_acl(self): storage = S3FeedStorage( 's3://mybucket/export.csv', 'access_key', @@ -284,7 +296,11 @@ class S3FeedStorageTest(unittest.TestCase): storage.connect_s3 = mock.MagicMock() self.assertFalse(storage.is_botocore) - storage._store_in_thread(BytesIO(b'test file')) + def _defer(f, *args, **kwargs): + return f(*args, **kwargs) + + with mock.patch('twisted.internet.threads.deferToThread', new=_defer): + storage.store(BytesIO(b'test file')) conn = storage.connect_s3(*storage.connect_s3.call_args) bucket = conn.get_bucket(*conn.get_bucket.call_args) @@ -294,7 +310,7 @@ class S3FeedStorageTest(unittest.TestCase): key.set_contents_from_file.call_args ) - def test_store_in_thread_not_botocore_with_acl(self): + def test_store_not_botocore_with_acl(self): storage = S3FeedStorage( 's3://mybucket/export.csv', 'access_key', @@ -309,7 +325,11 @@ class S3FeedStorageTest(unittest.TestCase): storage.connect_s3 = mock.MagicMock() self.assertFalse(storage.is_botocore) - storage._store_in_thread(BytesIO(b'test file')) + def _defer(f, *args, **kwargs): + return f(*args, **kwargs) + + with mock.patch('twisted.internet.threads.deferToThread', new=_defer): + storage.store(BytesIO(b'test file')) conn = storage.connect_s3(*storage.connect_s3.call_args) bucket = conn.get_bucket(*conn.get_bucket.call_args) From 1eac2a163c2c734594d4f1e7e026eab309b2b0b5 Mon Sep 17 00:00:00 2001 From: Victor Torres Date: Fri, 8 Feb 2019 16:50:39 -0200 Subject: [PATCH 250/889] simplifying how we deal with threads.deferToThread calls --- tests/test_feedexport.py | 30 ++++++++---------------------- 1 file changed, 8 insertions(+), 22 deletions(-) diff --git a/tests/test_feedexport.py b/tests/test_feedexport.py index e8c32ea43..0f31ef00e 100644 --- a/tests/test_feedexport.py +++ b/tests/test_feedexport.py @@ -237,6 +237,7 @@ class S3FeedStorageTest(unittest.TestCase): self.assertEqual(storage.secret_key, 'secret_key') self.assertEqual(storage.acl, 'custom-acl') + @defer.inlineCallbacks def test_store_botocore_without_acl(self): storage = S3FeedStorage( 's3://mybucket/export.csv', @@ -247,18 +248,14 @@ class S3FeedStorageTest(unittest.TestCase): self.assertEqual(storage.secret_key, 'secret_key') self.assertEqual(storage.acl, None) - def _defer(f, *args, **kwargs): - return f(*args, **kwargs) - with mock.patch('botocore.client.BaseClient._make_api_call') as m: - with mock.patch('twisted.internet.threads.deferToThread', - new=_defer): - storage.store(BytesIO(b'test file')) + yield storage.store(BytesIO(b'test file')) operation_name, api_params = m.call_args[0] self.assertEqual(operation_name, 'PutObject') self.assertNotIn('ACL', api_params) + @defer.inlineCallbacks def test_store_botocore_with_acl(self): storage = S3FeedStorage( 's3://mybucket/export.csv', @@ -270,18 +267,14 @@ class S3FeedStorageTest(unittest.TestCase): self.assertEqual(storage.secret_key, 'secret_key') self.assertEqual(storage.acl, 'custom-acl') - def _defer(f, *args, **kwargs): - return f(*args, **kwargs) - with mock.patch('botocore.client.BaseClient._make_api_call') as m: - with mock.patch('twisted.internet.threads.deferToThread', - new=_defer): - storage.store(BytesIO(b'test file')) + yield storage.store(BytesIO(b'test file')) operation_name, api_params = m.call_args[0] self.assertEqual(operation_name, 'PutObject') self.assertEqual(api_params.get('ACL'), 'custom-acl') + @defer.inlineCallbacks def test_store_not_botocore_without_acl(self): storage = S3FeedStorage( 's3://mybucket/export.csv', @@ -296,11 +289,7 @@ class S3FeedStorageTest(unittest.TestCase): storage.connect_s3 = mock.MagicMock() self.assertFalse(storage.is_botocore) - def _defer(f, *args, **kwargs): - return f(*args, **kwargs) - - with mock.patch('twisted.internet.threads.deferToThread', new=_defer): - storage.store(BytesIO(b'test file')) + yield storage.store(BytesIO(b'test file')) conn = storage.connect_s3(*storage.connect_s3.call_args) bucket = conn.get_bucket(*conn.get_bucket.call_args) @@ -310,6 +299,7 @@ class S3FeedStorageTest(unittest.TestCase): key.set_contents_from_file.call_args ) + @defer.inlineCallbacks def test_store_not_botocore_with_acl(self): storage = S3FeedStorage( 's3://mybucket/export.csv', @@ -325,11 +315,7 @@ class S3FeedStorageTest(unittest.TestCase): storage.connect_s3 = mock.MagicMock() self.assertFalse(storage.is_botocore) - def _defer(f, *args, **kwargs): - return f(*args, **kwargs) - - with mock.patch('twisted.internet.threads.deferToThread', new=_defer): - storage.store(BytesIO(b'test file')) + yield storage.store(BytesIO(b'test file')) conn = storage.connect_s3(*storage.connect_s3.call_args) bucket = conn.get_bucket(*conn.get_bucket.call_args) From 03e61b9908733f085d87da6bd29152389961b81a Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Adri=C3=A1n=20Chaves?= Date: Fri, 1 Feb 2019 13:50:01 +0100 Subject: [PATCH 251/889] Check that spidercls arguments in scrapy.crawler classes are not spider objects --- scrapy/crawler.py | 13 +++++++++++++ tests/test_crawler.py | 13 +++++++++++++ tests/test_downloadermiddleware_httpproxy.py | 2 +- 3 files changed, 27 insertions(+), 1 deletion(-) diff --git a/scrapy/crawler.py b/scrapy/crawler.py index 04aee18ed..ee00d27b4 100644 --- a/scrapy/crawler.py +++ b/scrapy/crawler.py @@ -7,6 +7,7 @@ import sys from twisted.internet import reactor, defer from zope.interface.verify import verifyClass, DoesNotImplement +from scrapy import Spider from scrapy.core.engine import ExecutionEngine from scrapy.resolver import CachingThreadedResolver from scrapy.interfaces import ISpiderLoader @@ -27,6 +28,10 @@ logger = logging.getLogger(__name__) class Crawler(object): def __init__(self, spidercls, settings=None): + if isinstance(spidercls, Spider): + raise ValueError( + 'The spidercls argument must be a class, not an object') + if isinstance(settings, dict) or settings is None: settings = Settings(settings) @@ -168,6 +173,10 @@ class CrawlerRunner(object): :param dict kwargs: keyword arguments to initialize the spider """ + if isinstance(crawler_or_spidercls, Spider): + raise ValueError( + 'The crawler_or_spidercls argument cannot be a spider object, ' + 'it must be a spider class (or a Crawler object)') crawler = self.create_crawler(crawler_or_spidercls) return self._crawl(crawler, *args, **kwargs) @@ -195,6 +204,10 @@ class CrawlerRunner(object): a spider with this name in a Scrapy project (using spider loader), then creates a Crawler instance for it. """ + if isinstance(crawler_or_spidercls, Spider): + raise ValueError( + 'The crawler_or_spidercls argument cannot be a spider object, ' + 'it must be a spider class (or a Crawler object)') if isinstance(crawler_or_spidercls, Crawler): return crawler_or_spidercls return self._create_crawler(crawler_or_spidercls) diff --git a/tests/test_crawler.py b/tests/test_crawler.py index 268948a70..37cea3ad3 100644 --- a/tests/test_crawler.py +++ b/tests/test_crawler.py @@ -4,6 +4,7 @@ import warnings from twisted.internet import defer from twisted.trial import unittest +from pytest import raises import scrapy from scrapy.crawler import Crawler, CrawlerRunner, CrawlerProcess @@ -66,6 +67,10 @@ class CrawlerTestCase(BaseCrawlerTest): crawler = Crawler(DefaultSpider) self.assertOptionIsDefault(crawler.settings, 'RETRY_ENABLED') + def test_crawler_rejects_spider_objects(self): + with raises(ValueError): + Crawler(DefaultSpider()) + class SpiderSettingsTestCase(unittest.TestCase): def test_spider_custom_settings(self): @@ -177,6 +182,14 @@ class CrawlerRunnerTestCase(BaseCrawlerTest): self.assertEqual(len(w), 1) self.assertIn('Please use SPIDER_LOADER_CLASS', str(w[0].message)) + def test_crawl_rejects_spider_objects(self): + with raises(ValueError): + CrawlerRunner().crawl(DefaultSpider()) + + def test_create_crawler_rejects_spider_objects(self): + with raises(ValueError): + CrawlerRunner().create_crawler(DefaultSpider()) + class CrawlerProcessTest(BaseCrawlerTest): def test_crawler_process_accepts_dict(self): diff --git a/tests/test_downloadermiddleware_httpproxy.py b/tests/test_downloadermiddleware_httpproxy.py index 537126613..30920b2da 100644 --- a/tests/test_downloadermiddleware_httpproxy.py +++ b/tests/test_downloadermiddleware_httpproxy.py @@ -25,7 +25,7 @@ class TestHttpProxyMiddleware(TestCase): def test_not_enabled(self): settings = Settings({'HTTPPROXY_ENABLED': False}) - crawler = Crawler(spider, settings) + crawler = Crawler(Spider, settings) self.assertRaises(NotConfigured, partial(HttpProxyMiddleware.from_crawler, crawler)) def test_no_environment_proxies(self): From 7c9f0bd86c5f02ea803fa6bf1242d34d9c9f47d5 Mon Sep 17 00:00:00 2001 From: Victor Torres Date: Tue, 12 Feb 2019 12:19:30 -0200 Subject: [PATCH 252/889] using named params with optional amazon s3 params --- scrapy/extensions/feedexport.py | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff --git a/scrapy/extensions/feedexport.py b/scrapy/extensions/feedexport.py index 2b4594ad8..f6bc460ea 100644 --- a/scrapy/extensions/feedexport.py +++ b/scrapy/extensions/feedexport.py @@ -131,9 +131,12 @@ class S3FeedStorage(BlockingFeedStorage): @classmethod def from_crawler(cls, crawler, uri): - return cls(uri, crawler.settings['AWS_ACCESS_KEY_ID'], - crawler.settings['AWS_SECRET_ACCESS_KEY'], - crawler.settings['FEED_STORAGE_S3_ACL']) + return cls( + uri=uri, + access_key=crawler.settings['AWS_ACCESS_KEY_ID'], + secret_key=crawler.settings['AWS_SECRET_ACCESS_KEY'], + acl=crawler.settings['FEED_STORAGE_S3_ACL'] + ) def _store_in_thread(self, file): file.seek(0) From c2dede27bd56bd783c45fb7302ca06b7c2c025c0 Mon Sep 17 00:00:00 2001 From: Victor Torres Date: Tue, 12 Feb 2019 12:22:05 -0200 Subject: [PATCH 253/889] reduce code with simple ternary operator --- scrapy/extensions/feedexport.py | 10 ++-------- 1 file changed, 2 insertions(+), 8 deletions(-) diff --git a/scrapy/extensions/feedexport.py b/scrapy/extensions/feedexport.py index f6bc460ea..40f985f19 100644 --- a/scrapy/extensions/feedexport.py +++ b/scrapy/extensions/feedexport.py @@ -141,10 +141,7 @@ class S3FeedStorage(BlockingFeedStorage): def _store_in_thread(self, file): file.seek(0) if self.is_botocore: - kwargs = dict() - if self.acl: - kwargs.update(dict(ACL=self.acl)) - + kwargs = {'ACL': self.acl} if self.acl else {} self.s3_client.put_object( Bucket=self.bucketname, Key=self.keyname, Body=file, **kwargs) @@ -152,10 +149,7 @@ class S3FeedStorage(BlockingFeedStorage): conn = self.connect_s3(self.access_key, self.secret_key) bucket = conn.get_bucket(self.bucketname, validate=False) key = bucket.new_key(self.keyname) - kwargs = dict() - if self.acl: - kwargs.update(dict(policy=self.acl)) - + kwargs = {'policy': self.acl} if self.acl else {} key.set_contents_from_file(file, **kwargs) key.close() From 984e706fd2e06457bcdd1226366d08950ac101b0 Mon Sep 17 00:00:00 2001 From: Victor Torres Date: Tue, 12 Feb 2019 12:26:57 -0200 Subject: [PATCH 254/889] using blank string instead of None as default value as proposed by @kmike --- docs/topics/feed-exports.rst | 2 +- scrapy/extensions/feedexport.py | 2 +- scrapy/settings/default_settings.py | 2 +- 3 files changed, 3 insertions(+), 3 deletions(-) diff --git a/docs/topics/feed-exports.rst b/docs/topics/feed-exports.rst index dee0c3ffa..cf70b8aca 100644 --- a/docs/topics/feed-exports.rst +++ b/docs/topics/feed-exports.rst @@ -312,7 +312,7 @@ The keys are URI schemes and the values are paths to storage classes. FEED_STORAGE_S3_ACL ------------------- -Default: ``None`` +Default: ``''`` (empty string) A string containing a custom ACL for feeds exported to Amazon S3 by your project. diff --git a/scrapy/extensions/feedexport.py b/scrapy/extensions/feedexport.py index 40f985f19..975fa1229 100644 --- a/scrapy/extensions/feedexport.py +++ b/scrapy/extensions/feedexport.py @@ -135,7 +135,7 @@ class S3FeedStorage(BlockingFeedStorage): uri=uri, access_key=crawler.settings['AWS_ACCESS_KEY_ID'], secret_key=crawler.settings['AWS_SECRET_ACCESS_KEY'], - acl=crawler.settings['FEED_STORAGE_S3_ACL'] + acl=crawler.settings['FEED_STORAGE_S3_ACL'] or None ) def _store_in_thread(self, file): diff --git a/scrapy/settings/default_settings.py b/scrapy/settings/default_settings.py index 776c5af23..a800d39ab 100644 --- a/scrapy/settings/default_settings.py +++ b/scrapy/settings/default_settings.py @@ -158,7 +158,7 @@ FEED_EXPORTERS_BASE = { } FEED_EXPORT_INDENT = 0 -FEED_STORAGE_S3_ACL = None +FEED_STORAGE_S3_ACL = '' FILES_STORE_S3_ACL = 'private' FILES_STORE_GCS_ACL = '' From 04ccf79e38561a2175c18440b3b4a53ba2f4992f Mon Sep 17 00:00:00 2001 From: Pedro Sousa Date: Wed, 13 Feb 2019 15:39:45 +0000 Subject: [PATCH 255/889] A different S3 Endpoint URL is now possible when uploading images --- scrapy/pipelines/images.py | 1 + 1 file changed, 1 insertion(+) diff --git a/scrapy/pipelines/images.py b/scrapy/pipelines/images.py index 95323c613..8338a6281 100644 --- a/scrapy/pipelines/images.py +++ b/scrapy/pipelines/images.py @@ -89,6 +89,7 @@ class ImagesPipeline(FilesPipeline): s3store = cls.STORE_SCHEMES['s3'] s3store.AWS_ACCESS_KEY_ID = settings['AWS_ACCESS_KEY_ID'] s3store.AWS_SECRET_ACCESS_KEY = settings['AWS_SECRET_ACCESS_KEY'] + s3store.AWS_ENDPOINT_URL = settings['AWS_ENDPOINT_URL'] s3store.POLICY = settings['IMAGES_STORE_S3_ACL'] gcs_store = cls.STORE_SCHEMES['gs'] From 50bf4c60c480a276651ff703cf9fed8e7f981d20 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Adri=C3=A1n=20Chaves?= Date: Wed, 13 Feb 2019 17:39:20 +0100 Subject: [PATCH 256/889] Document that the main entry point of downloader and spider middlewares is from_crawler() --- docs/topics/downloader-middleware.rst | 8 ++++++-- docs/topics/spider-middleware.rst | 8 ++++++-- 2 files changed, 12 insertions(+), 4 deletions(-) diff --git a/docs/topics/downloader-middleware.rst b/docs/topics/downloader-middleware.rst index 8dbe249fa..18a0639ce 100644 --- a/docs/topics/downloader-middleware.rst +++ b/docs/topics/downloader-middleware.rst @@ -55,8 +55,12 @@ particular setting. See each middleware documentation for more info. Writing your own downloader middleware ====================================== -Each middleware component is a Python class that defines one or -more of the following methods: +Each downloader middleware is a Python class that defines one or more of the +methods defined below. + +The main entry point is the ``from_crawler`` class method, which receives a +:class:`~scrapy.crawler.Crawler` instance. The :class:`~scrapy.crawler.Crawler` +object gives you access, for example, to the :ref:`settings `. .. module:: scrapy.downloadermiddlewares diff --git a/docs/topics/spider-middleware.rst b/docs/topics/spider-middleware.rst index 2b7e42771..62b5ca0e8 100644 --- a/docs/topics/spider-middleware.rst +++ b/docs/topics/spider-middleware.rst @@ -57,8 +57,12 @@ particular setting. See each middleware documentation for more info. Writing your own spider middleware ================================== -Each middleware component is a Python class that defines one or more of the -following methods: +Each spider middleware is a Python class that defines one or more of the +methods defined below. + +The main entry point is the ``from_crawler`` class method, which receives a +:class:`~scrapy.crawler.Crawler` instance. The :class:`~scrapy.crawler.Crawler` +object gives you access, for example, to the :ref:`settings `. .. module:: scrapy.spidermiddlewares From 430e9392483b3992c16bd0314f1bcaed91a9d392 Mon Sep 17 00:00:00 2001 From: Pedro Sousa Date: Wed, 13 Feb 2019 19:59:40 +0000 Subject: [PATCH 257/889] Added missing AWS Settings for ImagesPipeline --- scrapy/pipelines/images.py | 3 +++ 1 file changed, 3 insertions(+) diff --git a/scrapy/pipelines/images.py b/scrapy/pipelines/images.py index 8338a6281..a1457c7e9 100644 --- a/scrapy/pipelines/images.py +++ b/scrapy/pipelines/images.py @@ -90,6 +90,9 @@ class ImagesPipeline(FilesPipeline): s3store.AWS_ACCESS_KEY_ID = settings['AWS_ACCESS_KEY_ID'] s3store.AWS_SECRET_ACCESS_KEY = settings['AWS_SECRET_ACCESS_KEY'] s3store.AWS_ENDPOINT_URL = settings['AWS_ENDPOINT_URL'] + s3store.AWS_REGION_NAME = settings['AWS_REGION_NAME'] + s3store.AWS_USE_SSL = settings['AWS_USE_SSL'] + s3store.AWS_VERIFY = settings['AWS_VERIFY'] s3store.POLICY = settings['IMAGES_STORE_S3_ACL'] gcs_store = cls.STORE_SCHEMES['gs'] From b4d132b9f0824263d83331d0b36870f6f64918e4 Mon Sep 17 00:00:00 2001 From: Victor Torres Date: Wed, 13 Feb 2019 19:21:14 -0200 Subject: [PATCH 258/889] setting botocore version as described in debian jessie website https://packages.debian.org/en/jessie/python-botocore --- tox.ini | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tox.ini b/tox.ini index f2f3e1293..584da2dcd 100644 --- a/tox.ini +++ b/tox.ini @@ -47,7 +47,7 @@ deps = lxml==3.4.0 Twisted==14.0.2 boto==2.34.0 - botocore==1.12.89 + botocore==0.62 Pillow==2.6.1 cssselect==0.9.1 zope.interface==4.1.1 From dc0b643832e9f3400e432c2ef7a34e6c75ac8366 Mon Sep 17 00:00:00 2001 From: Victor Torres Date: Wed, 13 Feb 2019 19:44:50 -0200 Subject: [PATCH 259/889] refactoring tests to avoid mocking private method --- tests/test_feedexport.py | 21 +++++++++------------ 1 file changed, 9 insertions(+), 12 deletions(-) diff --git a/tests/test_feedexport.py b/tests/test_feedexport.py index 0f31ef00e..c103593f9 100644 --- a/tests/test_feedexport.py +++ b/tests/test_feedexport.py @@ -248,12 +248,9 @@ class S3FeedStorageTest(unittest.TestCase): self.assertEqual(storage.secret_key, 'secret_key') self.assertEqual(storage.acl, None) - with mock.patch('botocore.client.BaseClient._make_api_call') as m: - yield storage.store(BytesIO(b'test file')) - - operation_name, api_params = m.call_args[0] - self.assertEqual(operation_name, 'PutObject') - self.assertNotIn('ACL', api_params) + storage.s3_client = mock.MagicMock() + yield storage.store(BytesIO(b'test file')) + self.assertNotIn('ACL', storage.s3_client.put_object.call_args[1]) @defer.inlineCallbacks def test_store_botocore_with_acl(self): @@ -267,12 +264,12 @@ class S3FeedStorageTest(unittest.TestCase): self.assertEqual(storage.secret_key, 'secret_key') self.assertEqual(storage.acl, 'custom-acl') - with mock.patch('botocore.client.BaseClient._make_api_call') as m: - yield storage.store(BytesIO(b'test file')) - - operation_name, api_params = m.call_args[0] - self.assertEqual(operation_name, 'PutObject') - self.assertEqual(api_params.get('ACL'), 'custom-acl') + storage.s3_client = mock.MagicMock() + yield storage.store(BytesIO(b'test file')) + self.assertEqual( + storage.s3_client.put_object.call_args[1].get('ACL'), + 'custom-acl' + ) @defer.inlineCallbacks def test_store_not_botocore_without_acl(self): From ea8be627d15aa6fe1beaf50fff666cbeb161d94d Mon Sep 17 00:00:00 2001 From: Victor Torres Date: Wed, 13 Feb 2019 19:53:10 -0200 Subject: [PATCH 260/889] botocore is not supported on debian jessie --- tests/test_feedexport.py | 7 ++++++- tox.ini | 1 - 2 files changed, 6 insertions(+), 2 deletions(-) diff --git a/tests/test_feedexport.py b/tests/test_feedexport.py index c103593f9..2bf57e278 100644 --- a/tests/test_feedexport.py +++ b/tests/test_feedexport.py @@ -18,7 +18,6 @@ from tests import mock from tests.mockserver import MockServer from w3lib.url import path_to_file_uri -import botocore.client import scrapy from scrapy.exporters import CsvItemExporter from scrapy.extensions.feedexport import ( @@ -239,6 +238,9 @@ class S3FeedStorageTest(unittest.TestCase): @defer.inlineCallbacks def test_store_botocore_without_acl(self): + if os.getenv('TOX_ENV_NAME') == 'jessie': + raise unittest.SkipTest('botocore is not supported on jessie') + storage = S3FeedStorage( 's3://mybucket/export.csv', 'access_key', @@ -254,6 +256,9 @@ class S3FeedStorageTest(unittest.TestCase): @defer.inlineCallbacks def test_store_botocore_with_acl(self): + if os.getenv('TOX_ENV_NAME') == 'jessie': + raise unittest.SkipTest('botocore is not supported on jessie') + storage = S3FeedStorage( 's3://mybucket/export.csv', 'access_key', diff --git a/tox.ini b/tox.ini index 584da2dcd..0c0f8f7b7 100644 --- a/tox.ini +++ b/tox.ini @@ -47,7 +47,6 @@ deps = lxml==3.4.0 Twisted==14.0.2 boto==2.34.0 - botocore==0.62 Pillow==2.6.1 cssselect==0.9.1 zope.interface==4.1.1 From 9b8ba4c383df0f3029d1b07ab9647a7d902600f4 Mon Sep 17 00:00:00 2001 From: Victor Torres Date: Thu, 14 Feb 2019 16:20:56 -0200 Subject: [PATCH 261/889] try to import botocore before runing some tests --- tests/test_feedexport.py | 12 ++++++++---- 1 file changed, 8 insertions(+), 4 deletions(-) diff --git a/tests/test_feedexport.py b/tests/test_feedexport.py index 2bf57e278..3ff79c912 100644 --- a/tests/test_feedexport.py +++ b/tests/test_feedexport.py @@ -238,8 +238,10 @@ class S3FeedStorageTest(unittest.TestCase): @defer.inlineCallbacks def test_store_botocore_without_acl(self): - if os.getenv('TOX_ENV_NAME') == 'jessie': - raise unittest.SkipTest('botocore is not supported on jessie') + try: + import botocore + except ImportError: + raise unittest.SkipTest('botocore is required') storage = S3FeedStorage( 's3://mybucket/export.csv', @@ -256,8 +258,10 @@ class S3FeedStorageTest(unittest.TestCase): @defer.inlineCallbacks def test_store_botocore_with_acl(self): - if os.getenv('TOX_ENV_NAME') == 'jessie': - raise unittest.SkipTest('botocore is not supported on jessie') + try: + import botocore + except ImportError: + raise unittest.SkipTest('botocore is required') storage = S3FeedStorage( 's3://mybucket/export.csv', From b02d26fae8892775ad6ef306d80b02e6bc69d12e Mon Sep 17 00:00:00 2001 From: John de la Garza Date: Fri, 15 Feb 2019 16:54:19 -0800 Subject: [PATCH 263/889] rel_has_nofollow: remove redundant if statement --- scrapy/utils/misc.py | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/scrapy/utils/misc.py b/scrapy/utils/misc.py index 5ccfdcd72..6de36d45c 100644 --- a/scrapy/utils/misc.py +++ b/scrapy/utils/misc.py @@ -116,7 +116,7 @@ def md5sum(file): def rel_has_nofollow(rel): """Return True if link rel attribute has nofollow type""" - return True if rel is not None and 'nofollow' in rel.split() else False + return rel is not None and 'nofollow' in rel.split() def create_instance(objcls, settings, crawler, *args, **kwargs): From e3b15252c80ca3d0872f3068c382a0a3e7cc9db6 Mon Sep 17 00:00:00 2001 From: Matthieu Grandrie Date: Thu, 21 Feb 2019 17:19:58 +0100 Subject: [PATCH 264/889] New constructor arg *restrict_text* for FilteringLinkExtractor. Same as allow and deny args, it holds a string, a regex or an iterable of. Links whose text don't match one of the regex are filtered out. DOC restrict_text in LxmlLinkExtractor --- docs/topics/link-extractors.rst | 6 ++++++ scrapy/linkextractors/__init__.py | 6 +++++- scrapy/linkextractors/lxmlhtml.py | 9 +++++---- scrapy/linkextractors/sgml.py | 13 +++++++------ tests/test_linkextractors.py | 24 ++++++++++++++++++++++++ 5 files changed, 47 insertions(+), 11 deletions(-) diff --git a/docs/topics/link-extractors.rst b/docs/topics/link-extractors.rst index f40a36d31..713a94e10 100644 --- a/docs/topics/link-extractors.rst +++ b/docs/topics/link-extractors.rst @@ -93,6 +93,12 @@ LxmlLinkExtractor Has the same behaviour as ``restrict_xpaths``. :type restrict_css: str or list + :param restrict_text: a single regular expression (or list of regular expressions) + that the link's text must match in order to be extracted. If not + given (or empty), it will match all links. If a list of regular expressions is + given, the link will be extracted if it matches at least one. + :type restrict_text: a regular expression (or list of) + :param tags: a tag or a list of tags to consider when extracting links. Defaults to ``('a', 'area')``. :type tags: str or list diff --git a/scrapy/linkextractors/__init__.py b/scrapy/linkextractors/__init__.py index 97e8c0af1..ebf3cd7d8 100644 --- a/scrapy/linkextractors/__init__.py +++ b/scrapy/linkextractors/__init__.py @@ -50,7 +50,7 @@ class FilteringLinkExtractor(object): _csstranslator = HTMLTranslator() def __init__(self, link_extractor, allow, deny, allow_domains, deny_domains, - restrict_xpaths, canonicalize, deny_extensions, restrict_css): + restrict_xpaths, canonicalize, deny_extensions, restrict_css, restrict_text): self.link_extractor = link_extractor @@ -70,6 +70,8 @@ class FilteringLinkExtractor(object): if deny_extensions is None: deny_extensions = IGNORED_EXTENSIONS self.deny_extensions = {'.' + e for e in arg_to_iter(deny_extensions)} + self.restrict_text = [x if isinstance(x, _re_type) else re.compile(x) + for x in arg_to_iter(restrict_text)] def _link_allowed(self, link): if not _is_valid_url(link.url): @@ -85,6 +87,8 @@ class FilteringLinkExtractor(object): return False if self.deny_extensions and url_has_any_extension(parsed_url, self.deny_extensions): return False + if self.restrict_text and not _matches(link.text, self.restrict_text): + return False return True def matches(self, url): diff --git a/scrapy/linkextractors/lxmlhtml.py b/scrapy/linkextractors/lxmlhtml.py index a7092f9b8..8f6f93a44 100644 --- a/scrapy/linkextractors/lxmlhtml.py +++ b/scrapy/linkextractors/lxmlhtml.py @@ -97,7 +97,7 @@ class LxmlLinkExtractor(FilteringLinkExtractor): def __init__(self, allow=(), deny=(), allow_domains=(), deny_domains=(), restrict_xpaths=(), tags=('a', 'area'), attrs=('href',), canonicalize=False, unique=True, process_value=None, deny_extensions=None, restrict_css=(), - strip=True): + strip=True, restrict_text=None): tags, attrs = set(arg_to_iter(tags)), set(arg_to_iter(attrs)) tag_func = lambda x: x in tags attr_func = lambda x: x in attrs @@ -111,9 +111,10 @@ class LxmlLinkExtractor(FilteringLinkExtractor): ) super(LxmlLinkExtractor, self).__init__(lx, allow=allow, deny=deny, - allow_domains=allow_domains, deny_domains=deny_domains, - restrict_xpaths=restrict_xpaths, restrict_css=restrict_css, - canonicalize=canonicalize, deny_extensions=deny_extensions) + allow_domains=allow_domains, deny_domains=deny_domains, + restrict_xpaths=restrict_xpaths, restrict_css=restrict_css, + canonicalize=canonicalize, deny_extensions=deny_extensions, + restrict_text=restrict_text) def extract_links(self, response): base_url = get_base_url(response) diff --git a/scrapy/linkextractors/sgml.py b/scrapy/linkextractors/sgml.py index 5fa6b771c..8940a4d77 100644 --- a/scrapy/linkextractors/sgml.py +++ b/scrapy/linkextractors/sgml.py @@ -113,7 +113,7 @@ class SgmlLinkExtractor(FilteringLinkExtractor): def __init__(self, allow=(), deny=(), allow_domains=(), deny_domains=(), restrict_xpaths=(), tags=('a', 'area'), attrs=('href',), canonicalize=False, unique=True, process_value=None, deny_extensions=None, restrict_css=(), - strip=True): + strip=True, restrict_text=()): warnings.warn( "SgmlLinkExtractor is deprecated and will be removed in future releases. " "Please use scrapy.linkextractors.LinkExtractor", @@ -127,13 +127,14 @@ class SgmlLinkExtractor(FilteringLinkExtractor): with warnings.catch_warnings(): warnings.simplefilter('ignore', ScrapyDeprecationWarning) lx = BaseSgmlLinkExtractor(tag=tag_func, attr=attr_func, - unique=unique, process_value=process_value, strip=strip, - canonicalized=canonicalize) + unique=unique, process_value=process_value, strip=strip, + canonicalized=canonicalize) super(SgmlLinkExtractor, self).__init__(lx, allow=allow, deny=deny, - allow_domains=allow_domains, deny_domains=deny_domains, - restrict_xpaths=restrict_xpaths, restrict_css=restrict_css, - canonicalize=canonicalize, deny_extensions=deny_extensions) + allow_domains=allow_domains, deny_domains=deny_domains, + restrict_xpaths=restrict_xpaths, restrict_css=restrict_css, + canonicalize=canonicalize, deny_extensions=deny_extensions, + restrict_text=restrict_text) def extract_links(self, response): base_url = None diff --git a/tests/test_linkextractors.py b/tests/test_linkextractors.py index 903032b52..c9cd629f4 100644 --- a/tests/test_linkextractors.py +++ b/tests/test_linkextractors.py @@ -479,6 +479,30 @@ class LxmlLinkExtractorTestCase(Base.LinkExtractorTestCase): Link(url='http://example.org/item3.html', text=u'Item 3', nofollow=False), ]) + def test_link_restrict_text(self): + html = b""" + Pic of a cat + Pic of a dog + Pic of a cow + """ + response = HtmlResponse("http://example.org/index.html", body=html) + # Simple text inclusion test + lx = self.extractor_cls(restrict_text='dog') + self.assertEqual([link for link in lx.extract_links(response)], [ + Link(url='http://example.org/item2.html', text=u'Pic of a dog', nofollow=False), + ]) + # Unique regex test + lx = self.extractor_cls(restrict_text=r'of.*dog') + self.assertEqual([link for link in lx.extract_links(response)], [ + Link(url='http://example.org/item2.html', text=u'Pic of a dog', nofollow=False), + ]) + # Multiple regex test + lx = self.extractor_cls(restrict_text=[r'of.*dog', r'of.*cat']) + self.assertEqual([link for link in lx.extract_links(response)], [ + Link(url='http://example.org/item1.html', text=u'Pic of a cat', nofollow=False), + Link(url='http://example.org/item2.html', text=u'Pic of a dog', nofollow=False), + ]) + @pytest.mark.xfail def test_restrict_xpaths_with_html_entities(self): super(LxmlLinkExtractorTestCase, self).test_restrict_xpaths_with_html_entities() From 858f5be74728209d8ef71794296814abca4c1c93 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Adri=C3=A1n=20Chaves?= Date: Fri, 1 Mar 2019 16:10:23 +0100 Subject: [PATCH 265/889] =?UTF-8?q?backwards=20=E2=86=92=20backward=20(adj?= =?UTF-8?q?.)?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- docs/news.rst | 64 ++++++++++++------------- docs/topics/request-response.rst | 2 +- docs/topics/spiders.rst | 2 +- docs/versioning.rst | 2 +- scrapy/cmdline.py | 4 +- scrapy/conf.py | 2 +- scrapy/core/downloader/handlers/http.py | 2 +- scrapy/extensions/feedexport.py | 4 +- scrapy/log.py | 2 +- scrapy/signals.py | 2 +- scrapy/utils/conf.py | 4 +- sep/sep-018.rst | 2 +- tests/test_downloader_handlers.py | 2 +- tests/test_feedexport.py | 2 +- tests/test_utils_conf.py | 2 +- 15 files changed, 49 insertions(+), 49 deletions(-) diff --git a/docs/news.rst b/docs/news.rst index 668473887..7ac1664fe 100644 --- a/docs/news.rst +++ b/docs/news.rst @@ -53,7 +53,7 @@ case of Scrapy spiders: callbacks are usually called several times, on different pages. If you're using custom ``Selector`` or ``SelectorList`` subclasses, -a **backwards incompatible** change in parsel may affect your code. +a **backward incompatible** change in parsel may affect your code. See `parsel changelog`_ for a detailed description, as well as for the full list of improvements. @@ -62,7 +62,7 @@ full list of improvements. Telnet console ~~~~~~~~~~~~~~ -**Backwards incompatible**: Scrapy's telnet console now requires username +**Backward incompatible**: Scrapy's telnet console now requires username and password. See :ref:`topics-telnetconsole` for more details. This change fixes a **security issue**; see :ref:`release-1.5.2` release notes for details. @@ -209,7 +209,7 @@ Scrapy 1.5.2 (2019-01-22) exploit it from Scrapy, but it is very easy to trick a browser to do so and elevates the risk for local development environment. - *The fix is backwards incompatible*, it enables telnet user-password + *The fix is backward incompatible*, it enables telnet user-password authentication by default with a random generated password. If you can't upgrade right away, please consider setting :setting:`TELNET_CONSOLE_PORT` out of its default value. @@ -256,15 +256,15 @@ Some highlights: * Better default handling of HTTP 308, 522 and 524 status codes. * Documentation is improved, as usual. -Backwards Incompatible Changes -~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +Backward Incompatible Changes +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ * Scrapy 1.5 drops support for Python 3.3. * Default Scrapy User-Agent now uses https link to scrapy.org (:issue:`2983`). - **This is technically backwards-incompatible**; override + **This is technically backward-incompatible**; override :setting:`USER_AGENT` if you relied on old value. * Logging of settings overridden by ``custom_settings`` is fixed; - **this is technically backwards-incompatible** because the logger + **this is technically backward-incompatible** because the logger changes from ``[scrapy.utils.log]`` to ``[scrapy.crawler]``. If you're parsing Scrapy logs, please update your log parsers (:issue:`1343`). * LinkExtractor now ignores ``m4v`` extension by default, this is change @@ -301,11 +301,11 @@ Bug fixes ~~~~~~~~~ - Fix logging of settings overridden by ``custom_settings``; - **this is technically backwards-incompatible** because the logger + **this is technically backward-incompatible** because the logger changes from ``[scrapy.utils.log]`` to ``[scrapy.crawler]``, so please update your log parsers if needed (:issue:`1343`) - Default Scrapy User-Agent now uses https link to scrapy.org (:issue:`2983`). - **This is technically backwards-incompatible**; override + **This is technically backward-incompatible**; override :setting:`USER_AGENT` if you relied on old value. - Fix PyPy and PyPy3 test failures, support them officially (:issue:`2793`, :issue:`2935`, :issue:`2990`, :issue:`3050`, :issue:`2213`, @@ -415,18 +415,18 @@ offset, using the new :setting:`FEED_EXPORT_INDENT` setting. Enjoy! (Or read on for the rest of changes in this release.) -Deprecations and Backwards Incompatible Changes -~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +Deprecations and Backward Incompatible Changes +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ - Default to ``canonicalize=False`` in :class:`scrapy.linkextractors.LinkExtractor` (:issue:`2537`, fixes :issue:`1941` and :issue:`1982`): - **warning, this is technically backwards-incompatible** + **warning, this is technically backward-incompatible** - Enable memusage extension by default (:issue:`2539`, fixes :issue:`2187`); - **this is technically backwards-incompatible** so please check if you have + **this is technically backward-incompatible** so please check if you have any non-default ``MEMUSAGE_***`` options set. - ``EDITOR`` environment variable now takes precedence over ``EDITOR`` option defined in settings.py (:issue:`1829`); Scrapy default settings - no longer depend on environment variables. **This is technically a backwards + no longer depend on environment variables. **This is technically a backward incompatible change**. - ``Spider.make_requests_from_url`` is deprecated (:issue:`1728`, fixes :issue:`1495`). @@ -636,10 +636,10 @@ New Features scrapy shell now follow HTTP redirections by default (:issue:`2290`); See :command:`fetch` and :command:`shell` for details. - ``HttpErrorMiddleware`` now logs errors with ``INFO`` level instead of ``DEBUG``; - this is technically **backwards incompatible** so please check your log parsers. + this is technically **backward incompatible** so please check your log parsers. - By default, logger names now use a long-form path, e.g. ``[scrapy.extensions.logstats]``, instead of the shorter "top-level" variant of prior releases (e.g. ``[scrapy]``); - this is **backwards incompatible** if you have log parsers expecting the short + this is **backward incompatible** if you have log parsers expecting the short logger name part. You can switch back to short logger names using :setting:`LOG_SHORT_NAMES` set to ``True``. @@ -750,11 +750,11 @@ Bug fixes ~~~~~~~~~ - DefaultRequestHeaders middleware now runs before UserAgent middleware - (:issue:`2088`). **Warning: this is technically backwards incompatible**, + (:issue:`2088`). **Warning: this is technically backward incompatible**, though we consider this a bug fix. - HTTP cache extension and plugins that use the ``.scrapy`` data directory now work outside projects (:issue:`1581`). **Warning: this is technically - backwards incompatible**, though we consider this a bug fix. + backward incompatible**, though we consider this a bug fix. - ``Selector`` does not allow passing both ``response`` and ``text`` anymore (:issue:`2153`). - Fixed logging of wrong callback name with ``scrapy parse`` (:issue:`2169`). @@ -934,13 +934,13 @@ This 1.1 release brings a lot of interesting features and bug fixes: - Accept XML node names containing dots as valid (:issue:`1533`). - When uploading files or images to S3 (with ``FilesPipeline`` or ``ImagesPipeline``), the default ACL policy is now "private" instead - of "public" **Warning: backwards incompatible!**. + of "public" **Warning: backward incompatible!**. You can use :setting:`FILES_STORE_S3_ACL` to change it. - We've reimplemented ``canonicalize_url()`` for more correct output, especially for URLs with non-ASCII characters (:issue:`1947`). This could change link extractors output compared to previous scrapy versions. This may also invalidate some cache entries you could still have from pre-1.1 runs. - **Warning: backwards incompatible!**. + **Warning: backward incompatible!**. Keep reading for more details on other improvements and bug fixes. @@ -973,7 +973,7 @@ Additional New Features and Enhancements - Support for bpython and configure preferred Python shell via ``SCRAPY_PYTHON_SHELL`` (:issue:`1100`, :issue:`1444`). - Support URLs without scheme (:issue:`1498`) - **Warning: backwards incompatible!** + **Warning: backward incompatible!** - Bring back support for relative file path (:issue:`1710`, :issue:`1550`). - Added :setting:`MEMUSAGE_CHECK_INTERVAL_SECONDS` setting to change default check @@ -1056,7 +1056,7 @@ Bugfixes ~~~~~~~~ - Scrapy does not retry requests that got a ``HTTP 400 Bad Request`` - response anymore (:issue:`1289`). **Warning: backwards incompatible!** + response anymore (:issue:`1289`). **Warning: backward incompatible!** - Support empty password for http_proxy config (:issue:`1274`). - Interpret ``application/x-json`` as ``TextResponse`` (:issue:`1333`). - Support link rel attribute with multiple values (:issue:`1201`). @@ -1646,7 +1646,7 @@ Scrapy 0.24.2 (2014-07-08) Scrapy 0.24.1 (2014-06-27) -------------------------- -- Fix deprecated CrawlerSettings and increase backwards compatibility with +- Fix deprecated CrawlerSettings and increase backward compatibility with .defaults attribute (:commit:`8e3f20a`) @@ -1772,7 +1772,7 @@ Scrapy 0.22.0 (released 2014-01-17) Enhancements ~~~~~~~~~~~~ -- [**Backwards incompatible**] Switched HTTPCacheMiddleware backend to filesystem (:issue:`541`) +- [**Backward incompatible**] Switched HTTPCacheMiddleware backend to filesystem (:issue:`541`) To restore old backend set `HTTPCACHE_STORAGE` to `scrapy.contrib.httpcache.DbmCacheStorage` - Proxy \https:// urls using CONNECT method (:issue:`392`, :issue:`397`) - Add a middleware to crawl ajax crawleable pages as defined by google (:issue:`343`) @@ -2092,7 +2092,7 @@ Scrapy 0.16.1 (released 2012-10-26) ----------------------------------- - fixed LogStats extension, which got broken after a wrong merge before the 0.16 release (:commit:`8c780fd`) -- better backwards compatibility for scrapy.conf.settings (:commit:`3403089`) +- better backward compatibility for scrapy.conf.settings (:commit:`3403089`) - extended documentation on how to access crawler stats from extensions (:commit:`c4da0b5`) - removed .hgtags (no longer needed now that scrapy uses git) (:commit:`d52c188`) - fix dashes under rst headers (:commit:`fa4f7f9`) @@ -2107,7 +2107,7 @@ Scrapy changes: - added :ref:`topics-contracts`, a mechanism for testing spiders in a formal/reproducible way - added options ``-o`` and ``-t`` to the :command:`runspider` command - documented :doc:`topics/autothrottle` and added to extensions installed by default. You still need to enable it with :setting:`AUTOTHROTTLE_ENABLED` -- major Stats Collection refactoring: removed separation of global/per-spider stats, removed stats-related signals (``stats_spider_opened``, etc). Stats are much simpler now, backwards compatibility is kept on the Stats Collector API and signals. +- major Stats Collection refactoring: removed separation of global/per-spider stats, removed stats-related signals (``stats_spider_opened``, etc). Stats are much simpler now, backward compatibility is kept on the Stats Collector API and signals. - added :meth:`~scrapy.contrib.spidermiddleware.SpiderMiddleware.process_start_requests` method to spider middlewares - dropped Signals singleton. Signals should now be accesed through the Crawler.signals attribute. See the signals documentation for more info. - dropped Signals singleton. Signals should now be accesed through the Crawler.signals attribute. See the signals documentation for more info. @@ -2259,7 +2259,7 @@ Code rearranged and removed - Removed (undocumented) spider context extension (from scrapy.contrib.spidercontext) (:rev:`2780`) - removed ``CONCURRENT_SPIDERS`` setting (use scrapyd maxproc instead) (:rev:`2789`) - Renamed attributes of core components: downloader.sites -> downloader.slots, scraper.sites -> scraper.slots (:rev:`2717`, :rev:`2718`) -- Renamed setting ``CLOSESPIDER_ITEMPASSED`` to :setting:`CLOSESPIDER_ITEMCOUNT` (:rev:`2655`). Backwards compatibility kept. +- Renamed setting ``CLOSESPIDER_ITEMPASSED`` to :setting:`CLOSESPIDER_ITEMCOUNT` (:rev:`2655`). Backward compatibility kept. Scrapy 0.12 ----------- @@ -2356,11 +2356,11 @@ API changes - ``scrapy.stats.collector.SimpledbStatsCollector`` to ``scrapy.contrib.statscol.SimpledbStatsCollector`` - default per-command settings are now specified in the ``default_settings`` attribute of command object class (#201) - changed arguments of Item pipeline ``process_item()`` method from ``(spider, item)`` to ``(item, spider)`` - - backwards compatibility kept (with deprecation warning) + - backward compatibility kept (with deprecation warning) - moved ``scrapy.core.signals`` module to ``scrapy.signals`` - - backwards compatibility kept (with deprecation warning) + - backward compatibility kept (with deprecation warning) - moved ``scrapy.core.exceptions`` module to ``scrapy.exceptions`` - - backwards compatibility kept (with deprecation warning) + - backward compatibility kept (with deprecation warning) - added ``handles_request()`` class method to ``BaseSpider`` - dropped ``scrapy.log.exc()`` function (use ``scrapy.log.err()`` instead) - dropped ``component`` argument of ``scrapy.log.msg()`` function @@ -2431,8 +2431,8 @@ New features - Added support for HTTP proxies (``HttpProxyMiddleware``) (:rev:`1781`, :rev:`1785`) - Offsite spider middleware now logs messages when filtering out requests (:rev:`1841`) -Backwards-incompatible changes -~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +Backward-incompatible changes +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ - Changed ``scrapy.utils.response.get_meta_refresh()`` signature (:rev:`1804`) - Removed deprecated ``scrapy.item.ScrapedItem`` class - use ``scrapy.item.Item instead`` (:rev:`1838`) diff --git a/docs/topics/request-response.rst b/docs/topics/request-response.rst index 76360b15f..4511f3469 100644 --- a/docs/topics/request-response.rst +++ b/docs/topics/request-response.rst @@ -728,7 +728,7 @@ TextResponse objects .. method:: TextResponse.body_as_unicode() The same as :attr:`text`, but available as a method. This method is - kept for backwards compatibility; please prefer ``response.text``. + kept for backward compatibility; please prefer ``response.text``. HtmlResponse objects diff --git a/docs/topics/spiders.rst b/docs/topics/spiders.rst index 742a88659..e1d36aa24 100644 --- a/docs/topics/spiders.rst +++ b/docs/topics/spiders.rst @@ -190,7 +190,7 @@ scrapy.Spider .. method:: log(message, [level, component]) Wrapper that sends a log message through the Spider's :attr:`logger`, - kept for backwards compatibility. For more information see + kept for backward compatibility. For more information see :ref:`topics-logging-from-spiders`. .. method:: closed(reason) diff --git a/docs/versioning.rst b/docs/versioning.rst index 0421ba544..227085f02 100644 --- a/docs/versioning.rst +++ b/docs/versioning.rst @@ -12,7 +12,7 @@ There are 3 numbers in a Scrapy version: *A.B.C* * *A* is the major version. This will rarely change and will signify very large changes. * *B* is the release number. This will include many changes including features - and things that possibly break backwards compatibility, although we strive to + and things that possibly break backward compatibility, although we strive to keep theses cases at a minimum. * *C* is the bugfix release number. diff --git a/scrapy/cmdline.py b/scrapy/cmdline.py index dc6b59fe0..fa2506eb0 100644 --- a/scrapy/cmdline.py +++ b/scrapy/cmdline.py @@ -99,7 +99,7 @@ def execute(argv=None, settings=None): if argv is None: argv = sys.argv - # --- backwards compatibility for scrapy.conf.settings singleton --- + # --- backward compatibility for scrapy.conf.settings singleton --- if settings is None and 'scrapy.conf' in sys.modules: from scrapy import conf if hasattr(conf, 'settings'): @@ -116,7 +116,7 @@ def execute(argv=None, settings=None): settings['EDITOR'] = editor check_deprecated_settings(settings) - # --- backwards compatibility for scrapy.conf.settings singleton --- + # --- backward compatibility for scrapy.conf.settings singleton --- import warnings from scrapy.exceptions import ScrapyDeprecationWarning with warnings.catch_warnings(): diff --git a/scrapy/conf.py b/scrapy/conf.py index 23efc6ffd..6c40edcdd 100644 --- a/scrapy/conf.py +++ b/scrapy/conf.py @@ -1,4 +1,4 @@ -# This module is kept for backwards compatibility, so users can import +# This module is kept for backward compatibility, so users can import # scrapy.conf.settings and get the settings they expect import sys diff --git a/scrapy/core/downloader/handlers/http.py b/scrapy/core/downloader/handlers/http.py index e4a7d8564..e76823623 100644 --- a/scrapy/core/downloader/handlers/http.py +++ b/scrapy/core/downloader/handlers/http.py @@ -3,7 +3,7 @@ from .http10 import HTTP10DownloadHandler from .http11 import HTTP11DownloadHandler as HTTPDownloadHandler -# backwards compatibility +# backward compatibility class HttpDownloadHandler(HTTP10DownloadHandler): def __init__(self, *args, **kwargs): diff --git a/scrapy/extensions/feedexport.py b/scrapy/extensions/feedexport.py index 22ebf3b3f..3b4d809e8 100644 --- a/scrapy/extensions/feedexport.py +++ b/scrapy/extensions/feedexport.py @@ -94,7 +94,7 @@ class FileFeedStorage(object): class S3FeedStorage(BlockingFeedStorage): def __init__(self, uri, access_key=None, secret_key=None): - # BEGIN Backwards compatibility for initialising without keys (and + # BEGIN Backward compatibility for initialising without keys (and # without using from_crawler) no_defaults = access_key is None and secret_key is None if no_defaults: @@ -111,7 +111,7 @@ class S3FeedStorage(BlockingFeedStorage): ) access_key = settings['AWS_ACCESS_KEY_ID'] secret_key = settings['AWS_SECRET_ACCESS_KEY'] - # END Backwards compatibility + # END Backward compatibility u = urlparse(uri) self.bucketname = u.hostname self.access_key = u.username or access_key diff --git a/scrapy/log.py b/scrapy/log.py index 719fceaad..777bd6dc4 100644 --- a/scrapy/log.py +++ b/scrapy/log.py @@ -17,7 +17,7 @@ warnings.warn("Module `scrapy.log` has been deprecated, Scrapy now relies on " ScrapyDeprecationWarning, stacklevel=2) -# Imports and level_names variable kept for backwards-compatibility +# Imports and level_names variable kept for backward-compatibility DEBUG = logging.DEBUG INFO = logging.INFO diff --git a/scrapy/signals.py b/scrapy/signals.py index c0e4bb74e..6b9125302 100644 --- a/scrapy/signals.py +++ b/scrapy/signals.py @@ -20,7 +20,7 @@ item_scraped = object() item_dropped = object() item_error = object() -# for backwards compatibility +# for backward compatibility stats_spider_opened = spider_opened stats_spider_closing = spider_closed stats_spider_closed = spider_closed diff --git a/scrapy/utils/conf.py b/scrapy/utils/conf.py index 435e9a6b3..fbd297340 100644 --- a/scrapy/utils/conf.py +++ b/scrapy/utils/conf.py @@ -42,14 +42,14 @@ def build_component_list(compdict, custom=None, convert=update_classpath): raise ValueError('Invalid value {} for component {}, please provide ' \ 'a real number or None instead'.format(value, name)) - # BEGIN Backwards compatibility for old (base, custom) call signature + # BEGIN Backward compatibility for old (base, custom) call signature if isinstance(custom, (list, tuple)): _check_components(custom) return type(custom)(convert(c) for c in custom) if custom is not None: compdict.update(custom) - # END Backwards compatibility + # END Backward compatibility _validate_values(compdict) compdict = without_none_values(_map_keys(compdict)) diff --git a/sep/sep-018.rst b/sep/sep-018.rst index aca7ac342..fe707923a 100644 --- a/sep/sep-018.rst +++ b/sep/sep-018.rst @@ -211,7 +211,7 @@ spider methods on each event such as: - call additional spider middlewares defined in the ``Spider.middlewares`` attribute - call ``Spider.next_request()`` and ``Spider.start_requests()`` on - ``next_request()`` middleware method (this would implicitly support backwards + ``next_request()`` middleware method (this would implicitly support backward compatibility) Differences with Spider middleware v1 diff --git a/tests/test_downloader_handlers.py b/tests/test_downloader_handlers.py index 0d0829793..81235a16f 100644 --- a/tests/test_downloader_handlers.py +++ b/tests/test_downloader_handlers.py @@ -50,7 +50,7 @@ class DummyDH(object): class DummyLazyDH(object): - # Default is lazy for backwards compatibility + # Default is lazy for backward compatibility def __init__(self, crawler): pass diff --git a/tests/test_feedexport.py b/tests/test_feedexport.py index e46c8c14e..b254b9f38 100644 --- a/tests/test_feedexport.py +++ b/tests/test_feedexport.py @@ -161,7 +161,7 @@ class S3FeedStorageTest(unittest.TestCase): aws_credentials['AWS_SECRET_ACCESS_KEY']) self.assertEqual(storage.access_key, 'uri_key') self.assertEqual(storage.secret_key, 'uri_secret') - # Backwards compatibility for initialising without settings + # Backward compatibility for initialising without settings with warnings.catch_warnings(record=True) as w: storage = S3FeedStorage('s3://mybucket/export.csv') self.assertEqual(storage.access_key, 'conf_key') diff --git a/tests/test_utils_conf.py b/tests/test_utils_conf.py index f203c32ef..29937c189 100644 --- a/tests/test_utils_conf.py +++ b/tests/test_utils_conf.py @@ -11,7 +11,7 @@ class BuildComponentListTest(unittest.TestCase): self.assertEqual(build_component_list(d, convert=lambda x: x), ['one', 'four', 'three']) - def test_backwards_compatible_build_dict(self): + def test_backward_compatible_build_dict(self): base = {'one': 1, 'two': 2, 'three': 3, 'five': 5, 'six': None} custom = {'two': None, 'three': 8, 'four': 4} self.assertEqual(build_component_list(base, custom, From 75d6f56c8a731ea4e1c06814a59a0b51741d04a1 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Adri=C3=A1n=20Chaves?= Date: Fri, 1 Mar 2019 16:56:58 +0100 Subject: [PATCH 266/889] Switch from ` to `` where inline code formatting is desired --- docs/contributing.rst | 2 +- docs/news.rst | 130 +++++++++++++------------- docs/topics/api.rst | 4 +- docs/topics/downloader-middleware.rst | 40 ++++---- docs/topics/exporters.rst | 2 +- docs/topics/extensions.rst | 4 +- docs/topics/jobs.rst | 2 +- docs/topics/loaders.rst | 2 +- docs/topics/logging.rst | 2 +- docs/topics/media-pipeline.rst | 2 +- docs/topics/practices.rst | 2 +- docs/topics/request-response.rst | 8 +- docs/topics/selectors.rst | 2 +- docs/topics/settings.rst | 4 +- docs/topics/spider-middleware.rst | 4 +- docs/topics/spiders.rst | 6 +- docs/topics/ubuntu.rst | 4 +- scrapy/crawler.py | 10 +- scrapy/logformatter.py | 18 ++-- scrapy/pipelines/files.py | 6 +- scrapy/utils/ftp.py | 2 +- scrapy/utils/log.py | 2 +- scrapy/utils/python.py | 18 ++-- scrapy/utils/url.py | 8 +- sep/sep-006.rst | 5 +- tests/mocks/dummydbm.py | 2 +- tests/test_command_shell.py | 4 +- 27 files changed, 148 insertions(+), 147 deletions(-) diff --git a/docs/contributing.rst b/docs/contributing.rst index cf27337c8..9b508e418 100644 --- a/docs/contributing.rst +++ b/docs/contributing.rst @@ -55,7 +55,7 @@ guidelines when you're going to report a new bug. * search the `scrapy-users`_ list and `Scrapy subreddit`_ to see if it has been discussed there, or if you're not sure if what you're seeing is a bug. - You can also ask in the `#scrapy` IRC channel. + You can also ask in the ``#scrapy`` IRC channel. * write **complete, reproducible, specific bug reports**. The smaller the test case, the better. Remember that other developers won't have your project to diff --git a/docs/news.rst b/docs/news.rst index 668473887..1849a3ca8 100644 --- a/docs/news.rst +++ b/docs/news.rst @@ -149,7 +149,7 @@ Documentation improvements * improved links to beginner resources in the tutorial (:issue:`3367`, :issue:`3468`); * fixed :setting:`RETRY_HTTP_CODES` default values in docs (:issue:`3335`); -* remove unused `DEPTH_STATS` option from docs (:issue:`3245`); +* remove unused ``DEPTH_STATS`` option from docs (:issue:`3245`); * other cleanups (:issue:`3347`, :issue:`3350`, :issue:`3445`, :issue:`3544`, :issue:`3605`). @@ -1313,7 +1313,7 @@ Module Relocations There’s been a large rearrangement of modules trying to improve the general structure of Scrapy. Main changes were separating various subpackages into -new projects and dissolving both `scrapy.contrib` and `scrapy.contrib_exp` +new projects and dissolving both ``scrapy.contrib`` and ``scrapy.contrib_exp`` into top level packages. Backward compatibility was kept among internal relocations, while importing deprecated modules expect warnings indicating their new place. @@ -1344,7 +1344,7 @@ Outsourced packages | | /scrapy-plugins/scrapy-jsonrpc>`_ | +-------------------------------------+-------------------------------------+ -`scrapy.contrib_exp` and `scrapy.contrib` dissolutions +``scrapy.contrib_exp`` and ``scrapy.contrib`` dissolutions +-------------------------------------+-------------------------------------+ | Old location | New location | @@ -1556,7 +1556,7 @@ Code refactoring (:issue:`1078`) - Pydispatch pep8 (:issue:`992`) - Removed unused 'load=False' parameter from walk_modules() (:issue:`871`) -- For consistency, use `job_dir` helper in `SpiderState` extension. +- For consistency, use ``job_dir`` helper in ``SpiderState`` extension. (:issue:`805`) - rename "sflo" local variables to less cryptic "log_observer" (:issue:`775`) @@ -1669,10 +1669,10 @@ Enhancements cache middleware (:issue:`541`, :issue:`500`, :issue:`571`) - Expose current crawler in Scrapy shell (:issue:`557`) - Improve testsuite comparing CSV and XML exporters (:issue:`570`) -- New `offsite/filtered` and `offsite/domains` stats (:issue:`566`) +- New ``offsite/filtered`` and ``offsite/domains`` stats (:issue:`566`) - Support process_links as generator in CrawlSpider (:issue:`555`) - Verbose logging and new stats counters for DupeFilter (:issue:`553`) -- Add a mimetype parameter to `MailSender.send()` (:issue:`602`) +- Add a mimetype parameter to ``MailSender.send()`` (:issue:`602`) - Generalize file pipeline log messages (:issue:`622`) - Replace unencodeable codepoints with html entities in SGMLLinkExtractor (:issue:`565`) - Converted SEP documents to rst format (:issue:`629`, :issue:`630`, @@ -1691,20 +1691,20 @@ Enhancements - Make scrapy.version_info a tuple of integers (:issue:`681`, :issue:`692`) - Infer exporter's output format from filename extensions (:issue:`546`, :issue:`659`, :issue:`760`) -- Support case-insensitive domains in `url_is_from_any_domain()` (:issue:`693`) +- Support case-insensitive domains in ``url_is_from_any_domain()`` (:issue:`693`) - Remove pep8 warnings in project and spider templates (:issue:`698`) -- Tests and docs for `request_fingerprint` function (:issue:`597`) -- Update SEP-19 for GSoC project `per-spider settings` (:issue:`705`) +- Tests and docs for ``request_fingerprint`` function (:issue:`597`) +- Update SEP-19 for GSoC project ``per-spider settings`` (:issue:`705`) - Set exit code to non-zero when contracts fails (:issue:`727`) - Add a setting to control what class is instanciated as Downloader component (:issue:`738`) -- Pass response in `item_dropped` signal (:issue:`724`) -- Improve `scrapy check` contracts command (:issue:`733`, :issue:`752`) -- Document `spider.closed()` shortcut (:issue:`719`) -- Document `request_scheduled` signal (:issue:`746`) +- Pass response in ``item_dropped`` signal (:issue:`724`) +- Improve ``scrapy check`` contracts command (:issue:`733`, :issue:`752`) +- Document ``spider.closed()`` shortcut (:issue:`719`) +- Document ``request_scheduled`` signal (:issue:`746`) - Add a note about reporting security issues (:issue:`697`) - Add LevelDB http cache storage backend (:issue:`626`, :issue:`500`) -- Sort spider list output of `scrapy list` command (:issue:`742`) +- Sort spider list output of ``scrapy list`` command (:issue:`742`) - Multiple documentation enhancemens and fixes (:issue:`575`, :issue:`587`, :issue:`590`, :issue:`596`, :issue:`610`, :issue:`617`, :issue:`618`, :issue:`627`, :issue:`613`, :issue:`643`, @@ -1772,23 +1772,23 @@ Scrapy 0.22.0 (released 2014-01-17) Enhancements ~~~~~~~~~~~~ -- [**Backwards incompatible**] Switched HTTPCacheMiddleware backend to filesystem (:issue:`541`) - To restore old backend set `HTTPCACHE_STORAGE` to `scrapy.contrib.httpcache.DbmCacheStorage` +- [**Backward incompatible**] Switched HTTPCacheMiddleware backend to filesystem (:issue:`541`) + To restore old backend set ``HTTPCACHE_STORAGE`` to ``scrapy.contrib.httpcache.DbmCacheStorage`` - Proxy \https:// urls using CONNECT method (:issue:`392`, :issue:`397`) - Add a middleware to crawl ajax crawleable pages as defined by google (:issue:`343`) - Rename scrapy.spider.BaseSpider to scrapy.spider.Spider (:issue:`510`, :issue:`519`) - Selectors register EXSLT namespaces by default (:issue:`472`) - Unify item loaders similar to selectors renaming (:issue:`461`) -- Make `RFPDupeFilter` class easily subclassable (:issue:`533`) +- Make ``RFPDupeFilter`` class easily subclassable (:issue:`533`) - Improve test coverage and forthcoming Python 3 support (:issue:`525`) - Promote startup info on settings and middleware to INFO level (:issue:`520`) -- Support partials in `get_func_args` util (:issue:`506`, issue:`504`) +- Support partials in ``get_func_args`` util (:issue:`506`, issue:`504`) - Allow running indiviual tests via tox (:issue:`503`) - Update extensions ignored by link extractors (:issue:`498`) - Add middleware methods to get files/images/thumbs paths (:issue:`490`) - Improve offsite middleware tests (:issue:`478`) - Add a way to skip default Referer header set by RefererMiddleware (:issue:`475`) -- Do not send `x-gzip` in default `Accept-Encoding` header (:issue:`469`) +- Do not send ``x-gzip`` in default ``Accept-Encoding`` header (:issue:`469`) - Support defining http error handling using settings (:issue:`466`) - Use modern python idioms wherever you find legacies (:issue:`497`) - Improve and correct documentation @@ -1799,14 +1799,14 @@ Fixes ~~~~~ - Update Selector class imports in CrawlSpider template (:issue:`484`) -- Fix unexistent reference to `engine.slots` (:issue:`464`) -- Do not try to call `body_as_unicode()` on a non-TextResponse instance (:issue:`462`) +- Fix unexistent reference to ``engine.slots`` (:issue:`464`) +- Do not try to call ``body_as_unicode()`` on a non-TextResponse instance (:issue:`462`) - Warn when subclassing XPathItemLoader, previously it only warned on instantiation. (:issue:`523`) - Warn when subclassing XPathSelector, previously it only warned on instantiation. (:issue:`537`) - Multiple fixes to memory stats (:issue:`531`, :issue:`530`, :issue:`529`) -- Fix overriding url in `FormRequest.from_response()` (:issue:`507`) +- Fix overriding url in ``FormRequest.from_response()`` (:issue:`507`) - Fix tests runner under pip 1.5 (:issue:`513`) - Fix logging error when spider name is unicode (:issue:`479`) @@ -1833,7 +1833,7 @@ Enhancements (modifying them had been deprecated for a long time) - :setting:`ITEM_PIPELINES` is now defined as a dict (instead of a list) - Sitemap spider can fetch alternate URLs (:issue:`360`) -- `Selector.remove_namespaces()` now remove namespaces from element's attributes. (:issue:`416`) +- ``Selector.remove_namespaces()`` now remove namespaces from element's attributes. (:issue:`416`) - Paved the road for Python 3.3+ (:issue:`435`, :issue:`436`, :issue:`431`, :issue:`452`) - New item exporter using native python types with nesting support (:issue:`366`) - Tune HTTP1.1 pool size so it matches concurrency defined by settings (:commit:`b43b5f575`) @@ -1844,13 +1844,13 @@ Enhancements - Mock server (used for tests) can listen for HTTPS requests (:issue:`410`) - Remove multi spider support from multiple core components (:issue:`422`, :issue:`421`, :issue:`420`, :issue:`419`, :issue:`423`, :issue:`418`) -- Travis-CI now tests Scrapy changes against development versions of `w3lib` and `queuelib` python packages. +- Travis-CI now tests Scrapy changes against development versions of ``w3lib`` and ``queuelib`` python packages. - Add pypy 2.1 to continuous integration tests (:commit:`ecfa7431`) - Pylinted, pep8 and removed old-style exceptions from source (:issue:`430`, :issue:`432`) - Use importlib for parametric imports (:issue:`445`) - Handle a regression introduced in Python 2.7.5 that affects XmlItemExporter (:issue:`372`) - Bugfix crawling shutdown on SIGINT (:issue:`450`) -- Do not submit `reset` type inputs in FormRequest.from_response (:commit:`b326b87`) +- Do not submit ``reset`` type inputs in FormRequest.from_response (:commit:`b326b87`) - Do not silence download errors when request errback raises an exception (:commit:`684cfc0`) Bugfixes @@ -1865,8 +1865,8 @@ Bugfixes - Improve request-response docs (:issue:`391`) - Improve best practices docs (:issue:`399`, :issue:`400`, :issue:`401`, :issue:`402`) - Improve django integration docs (:issue:`404`) -- Document `bindaddress` request meta (:commit:`37c24e01d7`) -- Improve `Request` class documentation (:issue:`226`) +- Document ``bindaddress`` request meta (:commit:`37c24e01d7`) +- Improve ``Request`` class documentation (:issue:`226`) Other ~~~~~ @@ -1875,7 +1875,7 @@ Other - Add `cssselect`_ python package as install dependency - Drop libxml2 and multi selector's backend support, `lxml`_ is required from now on. - Minimum Twisted version increased to 10.0.0, dropped Twisted 8.0 support. -- Running test suite now requires `mock` python library (:issue:`390`) +- Running test suite now requires ``mock`` python library (:issue:`390`) Thanks @@ -1929,7 +1929,7 @@ Scrapy 0.18.3 (released 2013-10-03) Scrapy 0.18.2 (released 2013-09-03) ----------------------------------- -- Backport `scrapy check` command fixes and backward compatible multi +- Backport ``scrapy check`` command fixes and backward compatible multi crawler process(:issue:`339`) Scrapy 0.18.1 (released 2013-08-27) @@ -1958,31 +1958,31 @@ Scrapy 0.18.0 (released 2013-08-09) - Handle GET parameters for AJAX crawleable urls (:commit:`3fe2a32`) - Use lxml recover option to parse sitemaps (:issue:`347`) - Bugfix cookie merging by hostname and not by netloc (:issue:`352`) -- Support disabling `HttpCompressionMiddleware` using a flag setting (:issue:`359`) -- Support xml namespaces using `iternodes` parser in `XMLFeedSpider` (:issue:`12`) -- Support `dont_cache` request meta flag (:issue:`19`) -- Bugfix `scrapy.utils.gz.gunzip` broken by changes in python 2.7.4 (:commit:`4dc76e`) -- Bugfix url encoding on `SgmlLinkExtractor` (:issue:`24`) -- Bugfix `TakeFirst` processor shouldn't discard zero (0) value (:issue:`59`) +- Support disabling ``HttpCompressionMiddleware`` using a flag setting (:issue:`359`) +- Support xml namespaces using ``iternodes`` parser in ``XMLFeedSpider`` (:issue:`12`) +- Support ``dont_cache`` request meta flag (:issue:`19`) +- Bugfix ``scrapy.utils.gz.gunzip`` broken by changes in python 2.7.4 (:commit:`4dc76e`) +- Bugfix url encoding on ``SgmlLinkExtractor`` (:issue:`24`) +- Bugfix ``TakeFirst`` processor shouldn't discard zero (0) value (:issue:`59`) - Support nested items in xml exporter (:issue:`66`) - Improve cookies handling performance (:issue:`77`) - Log dupe filtered requests once (:issue:`105`) - Split redirection middleware into status and meta based middlewares (:issue:`78`) - Use HTTP1.1 as default downloader handler (:issue:`109` and :issue:`318`) -- Support xpath form selection on `FormRequest.from_response` (:issue:`185`) -- Bugfix unicode decoding error on `SgmlLinkExtractor` (:issue:`199`) +- Support xpath form selection on ``FormRequest.from_response`` (:issue:`185`) +- Bugfix unicode decoding error on ``SgmlLinkExtractor`` (:issue:`199`) - Bugfix signal dispatching on pypi interpreter (:issue:`205`) - Improve request delay and concurrency handling (:issue:`206`) -- Add RFC2616 cache policy to `HttpCacheMiddleware` (:issue:`212`) +- Add RFC2616 cache policy to ``HttpCacheMiddleware`` (:issue:`212`) - Allow customization of messages logged by engine (:issue:`214`) -- Multiples improvements to `DjangoItem` (:issue:`217`, :issue:`218`, :issue:`221`) +- Multiples improvements to ``DjangoItem`` (:issue:`217`, :issue:`218`, :issue:`221`) - Extend Scrapy commands using setuptools entry points (:issue:`260`) -- Allow spider `allowed_domains` value to be set/tuple (:issue:`261`) -- Support `settings.getdict` (:issue:`269`) -- Simplify internal `scrapy.core.scraper` slot handling (:issue:`271`) -- Added `Item.copy` (:issue:`290`) +- Allow spider ``allowed_domains`` value to be set/tuple (:issue:`261`) +- Support ``settings.getdict`` (:issue:`269`) +- Simplify internal ``scrapy.core.scraper`` slot handling (:issue:`271`) +- Added ``Item.copy`` (:issue:`290`) - Collect idle downloader slots (:issue:`297`) -- Add `ftp://` scheme downloader handler (:issue:`329`) +- Add ``ftp://`` scheme downloader handler (:issue:`329`) - Added downloader benchmark webserver and spider tools :ref:`benchmarking` - Moved persistent (on disk) queues to a separate project (queuelib_) which scrapy now depends on - Add scrapy commands using external libraries (:issue:`260`) @@ -2113,7 +2113,7 @@ Scrapy changes: - dropped Signals singleton. Signals should now be accesed through the Crawler.signals attribute. See the signals documentation for more info. - dropped Stats Collector singleton. Stats can now be accessed through the Crawler.stats attribute. See the stats collection documentation for more info. - documented :ref:`topics-api` -- `lxml` is now the default selectors backend instead of `libxml2` +- ``lxml`` is now the default selectors backend instead of ``libxml2`` - ported FormRequest.from_response() to use `lxml`_ instead of `ClientForm`_ - removed modules: ``scrapy.xlib.BeautifulSoup`` and ``scrapy.xlib.ClientForm`` - SitemapSpider: added support for sitemap urls ending in .xml and .xml.gz, even if they advertise a wrong content type (:commit:`10ed28b`) @@ -2206,16 +2206,16 @@ New features and settings - New ``ChunkedTransferMiddleware`` (enabled by default) to support `chunked transfer encoding`_ (:rev:`2769`) - Add boto 2.0 support for S3 downloader handler (:rev:`2763`) - Added `marshal`_ to formats supported by feed exports (:rev:`2744`) -- In request errbacks, offending requests are now received in `failure.request` attribute (:rev:`2738`) +- In request errbacks, offending requests are now received in ``failure.request`` attribute (:rev:`2738`) - Big downloader refactoring to support per domain/ip concurrency limits (:rev:`2732`) - ``CONCURRENT_REQUESTS_PER_SPIDER`` setting has been deprecated and replaced by: - :setting:`CONCURRENT_REQUESTS`, :setting:`CONCURRENT_REQUESTS_PER_DOMAIN`, :setting:`CONCURRENT_REQUESTS_PER_IP` - check the documentation for more details - Added builtin caching DNS resolver (:rev:`2728`) - Moved Amazon AWS-related components/extensions (SQS spider queue, SimpleDB stats collector) to a separate project: [scaws](https://github.com/scrapinghub/scaws) (:rev:`2706`, :rev:`2714`) -- Moved spider queues to scrapyd: `scrapy.spiderqueue` -> `scrapyd.spiderqueue` (:rev:`2708`) -- Moved sqlite utils to scrapyd: `scrapy.utils.sqlite` -> `scrapyd.sqlite` (:rev:`2781`) -- Real support for returning iterators on `start_requests()` method. The iterator is now consumed during the crawl when the spider is getting idle (:rev:`2704`) +- Moved spider queues to scrapyd: ``scrapy.spiderqueue`` -> ``scrapyd.spiderqueue`` (:rev:`2708`) +- Moved sqlite utils to scrapyd: ``scrapy.utils.sqlite`` -> ``scrapyd.sqlite`` (:rev:`2781`) +- Real support for returning iterators on ``start_requests()`` method. The iterator is now consumed during the crawl when the spider is getting idle (:rev:`2704`) - Added :setting:`REDIRECT_ENABLED` setting to quickly enable/disable the redirect middleware (:rev:`2697`) - Added :setting:`RETRY_ENABLED` setting to quickly enable/disable the retry middleware (:rev:`2694`) - Added ``CloseSpider`` exception to manually close spiders (:rev:`2691`) @@ -2223,19 +2223,19 @@ New features and settings - Refactored close spider behavior to wait for all downloads to finish and be processed by spiders, before closing the spider (:rev:`2688`) - Added ``SitemapSpider`` (see documentation in Spiders page) (:rev:`2658`) - Added ``LogStats`` extension for periodically logging basic stats (like crawled pages and scraped items) (:rev:`2657`) -- Make handling of gzipped responses more robust (#319, :rev:`2643`). Now Scrapy will try and decompress as much as possible from a gzipped response, instead of failing with an `IOError`. +- Make handling of gzipped responses more robust (#319, :rev:`2643`). Now Scrapy will try and decompress as much as possible from a gzipped response, instead of failing with an ``IOError``. - Simplified !MemoryDebugger extension to use stats for dumping memory debugging info (:rev:`2639`) -- Added new command to edit spiders: ``scrapy edit`` (:rev:`2636`) and `-e` flag to `genspider` command that uses it (:rev:`2653`) +- Added new command to edit spiders: ``scrapy edit`` (:rev:`2636`) and ``-e`` flag to ``genspider`` command that uses it (:rev:`2653`) - Changed default representation of items to pretty-printed dicts. (:rev:`2631`). This improves default logging by making log more readable in the default case, for both Scraped and Dropped lines. - Added :signal:`spider_error` signal (:rev:`2628`) - Added :setting:`COOKIES_ENABLED` setting (:rev:`2625`) -- Stats are now dumped to Scrapy log (default value of :setting:`STATS_DUMP` setting has been changed to `True`). This is to make Scrapy users more aware of Scrapy stats and the data that is collected there. +- Stats are now dumped to Scrapy log (default value of :setting:`STATS_DUMP` setting has been changed to ``True``). This is to make Scrapy users more aware of Scrapy stats and the data that is collected there. - Added support for dynamically adjusting download delay and maximum concurrent requests (:rev:`2599`) - Added new DBM HTTP cache storage backend (:rev:`2576`) - Added ``listjobs.json`` API to Scrapyd (:rev:`2571`) - ``CsvItemExporter``: added ``join_multivalued`` parameter (:rev:`2578`) - Added namespace support to ``xmliter_lxml`` (:rev:`2552`) -- Improved cookies middleware by making `COOKIES_DEBUG` nicer and documenting it (:rev:`2579`) +- Improved cookies middleware by making ``COOKIES_DEBUG`` nicer and documenting it (:rev:`2579`) - Several improvements to Scrapyd and Link extractors Code rearranged and removed @@ -2249,11 +2249,11 @@ Code rearranged and removed - Reduced Scrapy codebase by striping part of Scrapy code into two new libraries: - `w3lib`_ (several functions from ``scrapy.utils.{http,markup,multipart,response,url}``, done in :rev:`2584`) - `scrapely`_ (was ``scrapy.contrib.ibl``, done in :rev:`2586`) -- Removed unused function: `scrapy.utils.request.request_info()` (:rev:`2577`) -- Removed googledir project from `examples/googledir`. There's now a new example project called `dirbot` available on github: https://github.com/scrapy/dirbot +- Removed unused function: ``scrapy.utils.request.request_info()`` (:rev:`2577`) +- Removed googledir project from ``examples/googledir``. There's now a new example project called ``dirbot`` available on github: https://github.com/scrapy/dirbot - Removed support for default field values in Scrapy items (:rev:`2616`) - Removed experimental crawlspider v2 (:rev:`2632`) -- Removed scheduler middleware to simplify architecture. Duplicates filter is now done in the scheduler itself, using the same dupe fltering class as before (`DUPEFILTER_CLASS` setting) (:rev:`2640`) +- Removed scheduler middleware to simplify architecture. Duplicates filter is now done in the scheduler itself, using the same dupe fltering class as before (``DUPEFILTER_CLASS`` setting) (:rev:`2640`) - Removed support for passing urls to ``scrapy crawl`` command (use ``scrapy parse`` instead) (:rev:`2704`) - Removed deprecated Execution Queue (:rev:`2704`) - Removed (undocumented) spider context extension (from scrapy.contrib.spidercontext) (:rev:`2780`) @@ -2289,13 +2289,13 @@ Scrapyd changes - Scrapyd now uses one process per spider - It stores one log file per spider run, and rotate them keeping the lastest 5 logs per spider (by default) - A minimal web ui was added, available at http://localhost:6800 by default -- There is now a `scrapy server` command to start a Scrapyd server of the current project +- There is now a ``scrapy server`` command to start a Scrapyd server of the current project Changes to settings ~~~~~~~~~~~~~~~~~~~ -- added `HTTPCACHE_ENABLED` setting (False by default) to enable HTTP cache middleware -- changed `HTTPCACHE_EXPIRATION_SECS` semantics: now zero means "never expire". +- added ``HTTPCACHE_ENABLED`` setting (False by default) to enable HTTP cache middleware +- changed ``HTTPCACHE_EXPIRATION_SECS`` semantics: now zero means "never expire". Deprecated/obsoleted functionality ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ @@ -2326,17 +2326,17 @@ New features and improvements - Splitted Debian package into two packages - the library and the service (#187) - Scrapy log refactoring (#188) - New extension for keeping persistent spider contexts among different runs (#203) -- Added `dont_redirect` request.meta key for avoiding redirects (#233) -- Added `dont_retry` request.meta key for avoiding retries (#234) +- Added ``dont_redirect`` request.meta key for avoiding redirects (#233) +- Added ``dont_retry`` request.meta key for avoiding retries (#234) Command-line tool changes ~~~~~~~~~~~~~~~~~~~~~~~~~ -- New `scrapy` command which replaces the old `scrapy-ctl.py` (#199) - - there is only one global `scrapy` command now, instead of one `scrapy-ctl.py` per project - - Added `scrapy.bat` script for running more conveniently from Windows +- New ``scrapy`` command which replaces the old ``scrapy-ctl.py`` (#199) + - there is only one global ``scrapy`` command now, instead of one ``scrapy-ctl.py`` per project + - Added ``scrapy.bat`` script for running more conveniently from Windows - Added bash completion to command-line tool (#210) -- Renamed command `start` to `runserver` (#209) +- Renamed command ``start`` to ``runserver`` (#209) API changes ~~~~~~~~~~~ diff --git a/docs/topics/api.rst b/docs/topics/api.rst index 985cc0433..ba832ab5d 100644 --- a/docs/topics/api.rst +++ b/docs/topics/api.rst @@ -94,7 +94,7 @@ how you :ref:`configure the downloader middlewares .. method:: crawl(\*args, \**kwargs) Starts the crawler by instantiating its spider class with the given - `args` and `kwargs` arguments, while setting the execution engine in + ``args`` and ``kwargs`` arguments, while setting the execution engine in motion. Returns a deferred that is fired when the crawl is finished. @@ -180,7 +180,7 @@ SpiderLoader API .. method:: load(spider_name) Get the Spider class with the given name. It'll look into the previously - loaded spiders for a spider class with name `spider_name` and will raise + loaded spiders for a spider class with name ``spider_name`` and will raise a KeyError if not found. :param spider_name: spider class name diff --git a/docs/topics/downloader-middleware.rst b/docs/topics/downloader-middleware.rst index 8dbe249fa..e6812eddd 100644 --- a/docs/topics/downloader-middleware.rst +++ b/docs/topics/downloader-middleware.rst @@ -41,7 +41,7 @@ previous (or subsequent) middleware being applied. If you want to disable a built-in middleware (the ones defined in :setting:`DOWNLOADER_MIDDLEWARES_BASE` and enabled by default) you must define it -in your project's :setting:`DOWNLOADER_MIDDLEWARES` setting and assign `None` +in your project's :setting:`DOWNLOADER_MIDDLEWARES` setting and assign ``None`` as its value. For example, if you want to disable the user-agent middleware:: DOWNLOADER_MIDDLEWARES = { @@ -357,7 +357,7 @@ HttpCacheMiddleware .. reqmeta:: dont_cache - You can also avoid caching a response on every policy using :reqmeta:`dont_cache` meta key equals `True`. + You can also avoid caching a response on every policy using :reqmeta:`dont_cache` meta key equals ``True``. .. _httpcache-policy-dummy: @@ -390,17 +390,17 @@ runs to avoid downloading unmodified data (to save bandwidth and speed up crawls what is implemented: -* Do not attempt to store responses/requests with `no-store` cache-control directive set -* Do not serve responses from cache if `no-cache` cache-control directive is set even for fresh responses -* Compute freshness lifetime from `max-age` cache-control directive -* Compute freshness lifetime from `Expires` response header -* Compute freshness lifetime from `Last-Modified` response header (heuristic used by Firefox) -* Compute current age from `Age` response header -* Compute current age from `Date` header -* Revalidate stale responses based on `Last-Modified` response header -* Revalidate stale responses based on `ETag` response header -* Set `Date` header for any received response missing it -* Support `max-stale` cache-control directive in requests +* Do not attempt to store responses/requests with ``no-store`` cache-control directive set +* Do not serve responses from cache if ``no-cache`` cache-control directive is set even for fresh responses +* Compute freshness lifetime from ``max-age`` cache-control directive +* Compute freshness lifetime from ``Expires`` response header +* Compute freshness lifetime from ``Last-Modified`` response header (heuristic used by Firefox) +* Compute current age from ``Age`` response header +* Compute current age from ``Date`` header +* Revalidate stale responses based on ``Last-Modified`` response header +* Revalidate stale responses based on ``ETag`` response header +* Set ``Date`` header for any received response missing it +* Support ``max-stale`` cache-control directive in requests This allows spiders to be configured with the full RFC2616 cache policy, but avoid revalidation on a request-by-request basis, while remaining @@ -408,15 +408,15 @@ what is implemented: Example: - Add `Cache-Control: max-stale=600` to Request headers to accept responses that + Add ``Cache-Control: max-stale=600`` to Request headers to accept responses that have exceeded their expiration time by no more than 600 seconds. See also: RFC2616, 14.9.3 what is missing: -* `Pragma: no-cache` support https://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.9.1 -* `Vary` header support https://www.w3.org/Protocols/rfc2616/rfc2616-sec13.html#sec13.6 +* ``Pragma: no-cache`` support https://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.9.1 +* ``Vary`` header support https://www.w3.org/Protocols/rfc2616/rfc2616-sec13.html#sec13.6 * Invalidation after updates or deletes https://www.w3.org/Protocols/rfc2616/rfc2616-sec13.html#sec13.10 * ... probably others .. @@ -626,12 +626,12 @@ Default: ``False`` If enabled, will cache pages unconditionally. A spider may wish to have all responses available in the cache, for -future use with `Cache-Control: max-stale`, for instance. The +future use with ``Cache-Control: max-stale``, for instance. The DummyPolicy caches all responses but never revalidates them, and sometimes a more nuanced policy is desirable. -This setting still respects `Cache-Control: no-store` directives in responses. -If you don't want that, filter `no-store` out of the Cache-Control headers in +This setting still respects ``Cache-Control: no-store`` directives in responses. +If you don't want that, filter ``no-store`` out of the Cache-Control headers in responses you feedto the cache middleware. .. setting:: HTTPCACHE_IGNORE_RESPONSE_CACHE_CONTROLS @@ -940,7 +940,7 @@ UserAgentMiddleware Middleware that allows spiders to override the default user agent. - In order for a spider to override the default user agent, its `user_agent` + In order for a spider to override the default user agent, its ``user_agent`` attribute must be set. .. _ajaxcrawl-middleware: diff --git a/docs/topics/exporters.rst b/docs/topics/exporters.rst index 95f7920f8..f5048d2da 100644 --- a/docs/topics/exporters.rst +++ b/docs/topics/exporters.rst @@ -303,7 +303,7 @@ CsvItemExporter The additional keyword arguments of this constructor are passed to the :class:`BaseItemExporter` constructor, and the leftover arguments to the - `csv.writer`_ constructor, so you can use any `csv.writer` constructor + `csv.writer`_ constructor, so you can use any ``csv.writer`` constructor argument to customize this exporter. A typical output of this exporter would be:: diff --git a/docs/topics/extensions.rst b/docs/topics/extensions.rst index c421a5e05..d6e7452a1 100644 --- a/docs/topics/extensions.rst +++ b/docs/topics/extensions.rst @@ -19,7 +19,7 @@ settings, just like any other Scrapy code. It is customary for extensions to prefix their settings with their own name, to avoid collision with existing (and future) extensions. For example, a hypothetic extension to handle `Google Sitemaps`_ would use settings like -`GOOGLESITEMAP_ENABLED`, `GOOGLESITEMAP_DEPTH`, and so on. +``GOOGLESITEMAP_ENABLED``, ``GOOGLESITEMAP_DEPTH``, and so on. .. _Google Sitemaps: https://en.wikipedia.org/wiki/Sitemaps @@ -368,7 +368,7 @@ Invokes a `Python debugger`_ inside a running Scrapy process when a `SIGUSR2`_ signal is received. After the debugger is exited, the Scrapy process continues running normally. -For more info see `Debugging in Python`. +For more info see `Debugging in Python`_. This extension only works on POSIX-compliant platforms (ie. not Windows). diff --git a/docs/topics/jobs.rst b/docs/topics/jobs.rst index ea684b4cf..1a5d52487 100644 --- a/docs/topics/jobs.rst +++ b/docs/topics/jobs.rst @@ -71,7 +71,7 @@ on cookies. Request serialization --------------------- -Requests must be serializable by the `pickle` module, in order for persistence +Requests must be serializable by the ``pickle`` module, in order for persistence to work, so you should make sure that your requests are serializable. The most common issue here is to use ``lambda`` functions on request callbacks that diff --git a/docs/topics/loaders.rst b/docs/topics/loaders.rst index f3b6aa4a1..1c2f1da4d 100644 --- a/docs/topics/loaders.rst +++ b/docs/topics/loaders.rst @@ -286,7 +286,7 @@ ItemLoader objects given, one is instantiated automatically using the class in :attr:`default_item_class`. - When instantiated with a `selector` or a `response` parameters + When instantiated with a ``selector`` or a ``response`` parameters the :class:`ItemLoader` class provides convenient mechanisms for extracting data from web pages using :ref:`selectors `. diff --git a/docs/topics/logging.rst b/docs/topics/logging.rst index 0986929ad..8e280d929 100644 --- a/docs/topics/logging.rst +++ b/docs/topics/logging.rst @@ -243,7 +243,7 @@ scrapy.utils.log module case, its usage is not required but it's recommended. If you plan on configuring the handlers yourself is still recommended you - call this function, passing `install_root_handler=False`. Bear in mind + call this function, passing ``install_root_handler=False``. Bear in mind there won't be any log output set by default in that case. To get you started on manually configuring logging's output, you can use diff --git a/docs/topics/media-pipeline.rst b/docs/topics/media-pipeline.rst index c60b55391..381a2988a 100644 --- a/docs/topics/media-pipeline.rst +++ b/docs/topics/media-pipeline.rst @@ -132,7 +132,7 @@ For example, the following image URL:: http://www.example.com/image.jpg -Whose `SHA1 hash` is:: +Whose ``SHA1 hash`` is:: 3afec3b4765f8f0a07b78f98c07b83f013567a0a diff --git a/docs/topics/practices.rst b/docs/topics/practices.rst index 02cfa9b05..298a078a7 100644 --- a/docs/topics/practices.rst +++ b/docs/topics/practices.rst @@ -80,7 +80,7 @@ returned by the :meth:`CrawlerRunner.crawl ` method. Here's an example of its usage, along with a callback to manually stop the -reactor after `MySpider` has finished running. +reactor after ``MySpider`` has finished running. :: diff --git a/docs/topics/request-response.rst b/docs/topics/request-response.rst index 76360b15f..8b3ba4f2d 100644 --- a/docs/topics/request-response.rst +++ b/docs/topics/request-response.rst @@ -50,7 +50,7 @@ Request objects :type meta: dict :param body: the request body. If a ``unicode`` is passed, then it's encoded to - ``str`` using the `encoding` passed (which defaults to ``utf-8``). If + ``str`` using the ``encoding`` passed (which defaults to ``utf-8``). If ``body`` is not given, an empty string is stored. Regardless of the type of this argument, the final value stored will be a ``str`` (never ``unicode`` or ``None``). @@ -610,7 +610,7 @@ Response objects .. attribute:: Response.flags A list that contains flags for this response. Flags are labels used for - tagging Responses. For example: `'cached'`, `'redirected`', etc. And + tagging Responses. For example: ``'cached'``, ``'redirected``', etc. And they're shown on the string representation of the Response (`__str__` method) which is used by the engine for logging. @@ -682,7 +682,7 @@ TextResponse objects ``unicode(response.body)`` is not a correct way to convert response body to unicode: you would be using the system default encoding - (typically `ascii`) instead of the response encoding. + (typically ``ascii``) instead of the response encoding. .. attribute:: TextResponse.encoding @@ -690,7 +690,7 @@ TextResponse objects A string with the encoding of this response. The encoding is resolved by trying the following mechanisms, in order: - 1. the encoding passed in the constructor `encoding` argument + 1. the encoding passed in the constructor ``encoding`` argument 2. the encoding declared in the Content-Type HTTP header. If this encoding is not valid (ie. unknown), it is ignored and the next diff --git a/docs/topics/selectors.rst b/docs/topics/selectors.rst index df1d67ae8..edc18f14d 100644 --- a/docs/topics/selectors.rst +++ b/docs/topics/selectors.rst @@ -96,7 +96,7 @@ Constructing from response - :class:`~scrapy.http.HtmlResponse` is one of Using selectors --------------- -To explain how to use the selectors we'll use the `Scrapy shell` (which +To explain how to use the selectors we'll use the ``Scrapy shell`` (which provides interactive testing) and an example page located in the Scrapy documentation server: diff --git a/docs/topics/settings.rst b/docs/topics/settings.rst index 0ac26a9bd..1afa513c8 100644 --- a/docs/topics/settings.rst +++ b/docs/topics/settings.rst @@ -599,7 +599,7 @@ The amount of time (in secs) that the downloader will wait before timing out. DOWNLOAD_MAXSIZE ---------------- -Default: `1073741824` (1024MB) +Default: ``1073741824`` (1024MB) The maximum response size (in bytes) that downloader will download. @@ -620,7 +620,7 @@ If you want to disable it set to 0. DOWNLOAD_WARNSIZE ----------------- -Default: `33554432` (32MB) +Default: ``33554432`` (32MB) The response size (in bytes) that downloader will start to warn. diff --git a/docs/topics/spider-middleware.rst b/docs/topics/spider-middleware.rst index 2b7e42771..b551aa47d 100644 --- a/docs/topics/spider-middleware.rst +++ b/docs/topics/spider-middleware.rst @@ -43,7 +43,7 @@ previous (or subsequent) middleware being applied. If you want to disable a builtin middleware (the ones defined in :setting:`SPIDER_MIDDLEWARES_BASE`, and enabled by default) you must define it -in your project :setting:`SPIDER_MIDDLEWARES` setting and assign `None` as its +in your project :setting:`SPIDER_MIDDLEWARES` setting and assign ``None`` as its value. For example, if you want to disable the off-site middleware:: SPIDER_MIDDLEWARES = { @@ -200,7 +200,7 @@ DepthMiddleware .. class:: DepthMiddleware DepthMiddleware is used for tracking the depth of each Request inside the - site being scraped. It works by setting `request.meta['depth'] = 0` whenever + site being scraped. It works by setting ``request.meta['depth'] = 0`` whenever there is no value previously set (usually just the first Request) and incrementing it by 1 otherwise. diff --git a/docs/topics/spiders.rst b/docs/topics/spiders.rst index 742a88659..09feedefc 100644 --- a/docs/topics/spiders.rst +++ b/docs/topics/spiders.rst @@ -129,7 +129,7 @@ scrapy.Spider You probably won't need to override this directly because the default implementation acts as a proxy to the :meth:`__init__` method, calling - it with the given arguments `args` and named arguments `kwargs`. + it with the given arguments ``args`` and named arguments ``kwargs``. Nonetheless, this method sets the :attr:`crawler` and :attr:`settings` attributes in the new instance so they can be accessed later inside the @@ -298,13 +298,13 @@ The above example can also be written as follows:: Keep in mind that spider arguments are only strings. The spider will not do any parsing on its own. -If you were to set the `start_urls` attribute from the command line, +If you were to set the ``start_urls`` attribute from the command line, you would have to parse it on your own into a list using something like `ast.literal_eval `_ or `json.loads `_ and then set it as an attribute. -Otherwise, you would cause iteration over a `start_urls` string +Otherwise, you would cause iteration over a ``start_urls`` string (a very common python pitfall) resulting in each character being seen as a separate url. diff --git a/docs/topics/ubuntu.rst b/docs/topics/ubuntu.rst index 81ce800aa..6c993a970 100644 --- a/docs/topics/ubuntu.rst +++ b/docs/topics/ubuntu.rst @@ -22,7 +22,7 @@ To use the packages: sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv 627220E7 -2. Create `/etc/apt/sources.list.d/scrapy.list` file using the following command:: +2. Create ``/etc/apt/sources.list.d/scrapy.list`` file using the following command:: echo 'deb http://archive.scrapy.org/ubuntu scrapy main' | sudo tee /etc/apt/sources.list.d/scrapy.list @@ -34,7 +34,7 @@ To use the packages: .. note:: Repeat step 3 if you are trying to upgrade Scrapy. -.. warning:: `python-scrapy` is a different package provided by official debian +.. warning:: ``python-scrapy`` is a different package provided by official debian repositories, it's very outdated and it isn't supported by Scrapy team. .. _Scrapinghub: https://scrapinghub.com/ diff --git a/scrapy/crawler.py b/scrapy/crawler.py index 04aee18ed..2ecc4daad 100644 --- a/scrapy/crawler.py +++ b/scrapy/crawler.py @@ -153,7 +153,7 @@ class CrawlerRunner(object): It will call the given Crawler's :meth:`~Crawler.crawl` method, while keeping track of it so it can be stopped later. - If `crawler_or_spidercls` isn't a :class:`~scrapy.crawler.Crawler` + If ``crawler_or_spidercls`` isn't a :class:`~scrapy.crawler.Crawler` instance, this method will try to create one using this parameter as the spider class given to it. @@ -188,10 +188,10 @@ class CrawlerRunner(object): """ Return a :class:`~scrapy.crawler.Crawler` object. - * If `crawler_or_spidercls` is a Crawler, it is returned as-is. - * If `crawler_or_spidercls` is a Spider subclass, a new Crawler + * If ``crawler_or_spidercls`` is a Crawler, it is returned as-is. + * If ``crawler_or_spidercls`` is a Spider subclass, a new Crawler is constructed for it. - * If `crawler_or_spidercls` is a string, this function finds + * If ``crawler_or_spidercls`` is a string, this function finds a spider with this name in a Scrapy project (using spider loader), then creates a Crawler instance for it. """ @@ -273,7 +273,7 @@ class CrawlerProcess(CrawlerRunner): :setting:`REACTOR_THREADPOOL_MAXSIZE`, and installs a DNS cache based on :setting:`DNSCACHE_ENABLED` and :setting:`DNSCACHE_SIZE`. - If `stop_after_crawl` is True, the reactor will be stopped after all + If ``stop_after_crawl`` is True, the reactor will be stopped after all crawlers have finished, using :meth:`join`. :param boolean stop_after_crawl: stop or not the reactor when all diff --git a/scrapy/logformatter.py b/scrapy/logformatter.py index 075a6d862..65f347dcf 100644 --- a/scrapy/logformatter.py +++ b/scrapy/logformatter.py @@ -13,21 +13,21 @@ CRAWLEDMSG = u"Crawled (%(status)s) %(request)s%(request_flags)s (referer: %(ref class LogFormatter(object): """Class for generating log messages for different actions. - All methods must return a dictionary listing the parameters `level`, `msg` - and `args` which are going to be used for constructing the log message when - calling logging.log. + All methods must return a dictionary listing the parameters ``level``, + ``msg`` and ``args`` which are going to be used for constructing the log + message when calling logging.log. Dictionary keys for the method outputs: - * `level` should be the log level for that action, you can use those + * ``level`` should be the log level for that action, you can use those from the python logging library: logging.DEBUG, logging.INFO, logging.WARNING, logging.ERROR and logging.CRITICAL. - * `msg` should be a string that can contain different formatting - placeholders. This string, formatted with the provided `args`, is going - to be the log message for that action. + * ``msg`` should be a string that can contain different formatting + placeholders. This string, formatted with the provided ``args``, is + going to be the log message for that action. - * `args` should be a tuple or dict with the formatting placeholders for - `msg`. The final log message is computed as output['msg'] % + * ``args`` should be a tuple or dict with the formatting placeholders + for ``msg``. The final log message is computed as output['msg'] % output['args']. """ diff --git a/scrapy/pipelines/files.py b/scrapy/pipelines/files.py index 510cc23c7..2d8091f5b 100644 --- a/scrapy/pipelines/files.py +++ b/scrapy/pipelines/files.py @@ -255,13 +255,13 @@ class FilesPipeline(MediaPipeline): doing stat of the files and determining if file is new, uptodate or expired. - `new` files are those that pipeline never processed and needs to be + ``new`` files are those that pipeline never processed and needs to be downloaded from supplier site the first time. - `uptodate` files are the ones that the pipeline processed and are still + ``uptodate`` files are the ones that the pipeline processed and are still valid files. - `expired` files are those that pipeline already processed but the last + ``expired`` files are those that pipeline already processed but the last modification was made long time ago, so a reprocessing is recommended to refresh it in case of change. diff --git a/scrapy/utils/ftp.py b/scrapy/utils/ftp.py index f255d436f..9eca6a4da 100644 --- a/scrapy/utils/ftp.py +++ b/scrapy/utils/ftp.py @@ -2,7 +2,7 @@ from ftplib import error_perm from posixpath import dirname def ftp_makedirs_cwd(ftp, path, first_call=True): - """Set the current directory of the FTP connection given in the `ftp` + """Set the current directory of the FTP connection given in the ``ftp`` argument (as a ftplib.FTP object), creating all parent directories if they don't exist. The ftplib.FTP object must be already connected and logged in. """ diff --git a/scrapy/utils/log.py b/scrapy/utils/log.py index 828880709..e07fb8698 100644 --- a/scrapy/utils/log.py +++ b/scrapy/utils/log.py @@ -32,7 +32,7 @@ class TopLevelFormatter(logging.Filter): Since it can't be set for just one logger (it won't propagate for its children), it's going to be set in the root handler, with a parametrized - `loggers` list where it should act. + ``loggers`` list where it should act. """ def __init__(self, loggers=None): diff --git a/scrapy/utils/python.py b/scrapy/utils/python.py index 732ca13a0..aade3d9ac 100644 --- a/scrapy/utils/python.py +++ b/scrapy/utils/python.py @@ -97,8 +97,8 @@ def unicode_to_str(text, encoding=None, errors='strict'): def to_unicode(text, encoding=None, errors='strict'): - """Return the unicode representation of a bytes object `text`. If `text` - is already an unicode object, return it as-is.""" + """Return the unicode representation of a bytes object ``text``. If + ``text`` is already an unicode object, return it as-is.""" if isinstance(text, six.text_type): return text if not isinstance(text, (bytes, six.text_type)): @@ -110,7 +110,7 @@ def to_unicode(text, encoding=None, errors='strict'): def to_bytes(text, encoding=None, errors='strict'): - """Return the binary representation of `text`. If `text` + """Return the binary representation of ``text``. If ``text`` is already a bytes object, return it as-is.""" if isinstance(text, bytes): return text @@ -123,7 +123,7 @@ def to_bytes(text, encoding=None, errors='strict'): def to_native_str(text, encoding=None, errors='strict'): - """ Return str representation of `text` + """ Return str representation of ``text`` (bytes in Python 2.x and unicode in Python 3.x). """ if six.PY2: return to_bytes(text, encoding, errors) @@ -189,7 +189,7 @@ def isbinarytext(text): def binary_is_text(data): - """ Returns `True` if the given ``data`` argument (a ``bytes`` object) + """ Returns ``True`` if the given ``data`` argument (a ``bytes`` object) does not contain unprintable control characters. """ if not isinstance(data, bytes): @@ -314,7 +314,7 @@ class WeakKeyCache(object): @deprecated def stringify_dict(dct_or_tuples, encoding='utf-8', keys_only=True): """Return a (new) dict with unicode keys (and values when "keys_only" is - False) of the given dict converted to strings. `dct_or_tuples` can be a + False) of the given dict converted to strings. ``dct_or_tuples`` can be a dict or a list of tuples, like any dict constructor supports. """ d = {} @@ -357,10 +357,10 @@ def retry_on_eintr(function, *args, **kw): def without_none_values(iterable): - """Return a copy of `iterable` with all `None` entries removed. + """Return a copy of ``iterable`` with all ``None`` entries removed. - If `iterable` is a mapping, return a dictionary where all pairs that have - value `None` have been removed. + If ``iterable`` is a mapping, return a dictionary where all pairs that have + value ``None`` have been removed. """ try: return {k: v for k, v in six.iteritems(iterable) if v is not None} diff --git a/scrapy/utils/url.py b/scrapy/utils/url.py index 657c53815..b3a4be007 100644 --- a/scrapy/utils/url.py +++ b/scrapy/utils/url.py @@ -109,12 +109,12 @@ def strip_url(url, strip_credentials=True, strip_default_port=True, origin_only= """Strip URL string from some of its components: - - `strip_credentials` removes "user:password@" - - `strip_default_port` removes ":80" (resp. ":443", ":21") + - ``strip_credentials`` removes "user:password@" + - ``strip_default_port`` removes ":80" (resp. ":443", ":21") from http:// (resp. https://, ftp://) URLs - - `origin_only` replaces path component with "/", also dropping + - ``origin_only`` replaces path component with "/", also dropping query and fragment components ; it also strips credentials - - `strip_fragment` drops any #fragment component + - ``strip_fragment`` drops any #fragment component """ parsed_url = urlparse(url) diff --git a/sep/sep-006.rst b/sep/sep-006.rst index 366fcf033..eb362e945 100644 --- a/sep/sep-006.rst +++ b/sep/sep-006.rst @@ -10,7 +10,8 @@ Status Obsolete (discarded) SEP-006: Rename of Selectors to Extractors ========================================== -This SEP proposes a more meaningful naming of XPathSelectors or "Selectors" and their `x` method. +This SEP proposes a more meaningful naming of XPathSelectors or "Selectors" and +their ``x`` method. Motivation ========== @@ -57,7 +58,7 @@ Additional changes As the name of the method for performing selection (the ``x`` method) is not descriptive nor mnemotechnic enough and clearly clashes with ``extract`` method (x sounds like a short for extract in english), we propose to rename it to -`select`, `sel` (is shortness if required), or `xpath` after `lxml's +``select``, ``sel`` (is shortness if required), or ``xpath`` after `lxml's `_ ``xpath`` method. Bonus (ItemBuilder) diff --git a/tests/mocks/dummydbm.py b/tests/mocks/dummydbm.py index 40d9293b2..431428331 100644 --- a/tests/mocks/dummydbm.py +++ b/tests/mocks/dummydbm.py @@ -16,7 +16,7 @@ _DATABASES = collections.defaultdict(DummyDB) def open(file, flag='r', mode=0o666): """Open or create a dummy database compatible. - Arguments `flag` and `mode` are ignored. + Arguments ``flag`` and ``mode`` are ignored. """ # return same instance for same file argument return _DATABASES[file] diff --git a/tests/test_command_shell.py b/tests/test_command_shell.py index 36baacfbd..d664b6ade 100644 --- a/tests/test_command_shell.py +++ b/tests/test_command_shell.py @@ -61,7 +61,7 @@ class ShellTest(ProcessTest, SiteTest, unittest.TestCase): @defer.inlineCallbacks def test_fetch_redirect_follow_302(self): - """Test that calling `fetch(url)` follows HTTP redirects by default.""" + """Test that calling ``fetch(url)`` follows HTTP redirects by default.""" url = self.url('/redirect-no-meta-refresh') code = "fetch('{0}')" errcode, out, errout = yield self.execute(['-c', code.format(url)]) @@ -71,7 +71,7 @@ class ShellTest(ProcessTest, SiteTest, unittest.TestCase): @defer.inlineCallbacks def test_fetch_redirect_not_follow_302(self): - """Test that calling `fetch(url, redirect=False)` disables automatic redirects.""" + """Test that calling ``fetch(url, redirect=False)`` disables automatic redirects.""" url = self.url('/redirect-no-meta-refresh') code = "fetch('{0}', redirect=False)" errcode, out, errout = yield self.execute(['-c', code.format(url)]) From 82d239f3b148d9ce69f67bd7a2cb00de7e934aa6 Mon Sep 17 00:00:00 2001 From: Anubhav Patel Date: Wed, 6 Mar 2019 12:08:09 +0530 Subject: [PATCH 267/889] docs for scrapy.logformatter --- docs/topics/logging.rst | 39 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 39 insertions(+) diff --git a/docs/topics/logging.rst b/docs/topics/logging.rst index 0986929ad..a5fecebba 100644 --- a/docs/topics/logging.rst +++ b/docs/topics/logging.rst @@ -193,6 +193,45 @@ to override some of the Scrapy settings regarding logging. Module `logging.handlers `_ Further documentation on available handlers +Custom Log Formats +------------------- + +Custom log format can be set for different actions by extending ``scrapy.logformatter.LogFormatter`` class. + +Each method of ``scrapy.logformatter.LogFormatter`` represents an action. All methods inherited from +``scrapy.logformatter.LogFormatter`` in your custom log formatting class must return a dictionary listing +the parameters ``level``, ``msg`` and ``args`` which are going to be used for constructing the log message. +Listed below is details of what each key represents : + +* ``level`` is the log level for that action, you can use those from the python logging library: + :setting:`logging.DEBUG`, :setting:`logging.INFO`, :setting:`logging.WARNING`, :setting:`logging.ERROR` + and :setting:`logging.CRITICAL`. + +* ``msg`` should be a string that can contain different formatting placeholders. This string, formatted + with the provided ``args``, is going to be the long message for that action. + +* ``args`` should be a tuple or dict with the formatting placeholders for `msg`. The final log message is + computed as ``msg % args``. + +.. note:: To use custom log formatting class, you must mention it in ``settings.py``, by adding a line + ``LOG_FORMATTER = '’`` + +.. class:: scrapy.logformatter.LogFormatter + + The default log formatting class in Scrapy. + + .. method:: crawled (request, response, spider) + + ``crawled`` is called to log message when the crawler finds a webpage. + + .. method:: scraped(item, response, spider) + + ``scraped`` is called to log message when an item scraped by a spider. + + .. method:: dropped(item, exception, response, spider) + + ``dropped`` is called to log message when an item is dropped while it is passing through the item pipeline. + Advanced customization ---------------------- From 184def1060f95767ef767948edeb3bbb4ed0e428 Mon Sep 17 00:00:00 2001 From: Anubhav Patel Date: Thu, 7 Mar 2019 00:09:10 +0530 Subject: [PATCH 268/889] fix a link inside docs --- docs/topics/architecture.rst | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/docs/topics/architecture.rst b/docs/topics/architecture.rst index 4ac39ad2d..2effe94dc 100644 --- a/docs/topics/architecture.rst +++ b/docs/topics/architecture.rst @@ -172,5 +172,5 @@ links: .. _Twisted: https://twistedmatrix.com/trac/ .. _Introduction to Deferreds in Twisted: https://twistedmatrix.com/documents/current/core/howto/defer-intro.html -.. _Twisted - hello, asynchronous programming: http://jessenoller.com/2009/02/11/twisted-hello-asynchronous-programming/ +.. _Twisted - hello, asynchronous programming: http://jessenoller.com/blog/2009/02/11/twisted-hello-asynchronous-programming/ .. _Twisted Introduction - Krondo: http://krondo.com/an-introduction-to-asynchronous-programming-and-twisted/ From 924b67437b92f14601816d02c5d153e7281da6d4 Mon Sep 17 00:00:00 2001 From: Anubhav Patel Date: Thu, 7 Mar 2019 16:40:59 +0530 Subject: [PATCH 269/889] move api docs to source code --- docs/topics/logging.rst | 38 ++++---------------------------------- docs/topics/settings.rst | 9 +++++++++ scrapy/logformatter.py | 36 +++++++++++++++++++++++------------- 3 files changed, 36 insertions(+), 47 deletions(-) diff --git a/docs/topics/logging.rst b/docs/topics/logging.rst index a5fecebba..72f24bae6 100644 --- a/docs/topics/logging.rst +++ b/docs/topics/logging.rst @@ -196,41 +196,11 @@ to override some of the Scrapy settings regarding logging. Custom Log Formats ------------------- -Custom log format can be set for different actions by extending ``scrapy.logformatter.LogFormatter`` class. - -Each method of ``scrapy.logformatter.LogFormatter`` represents an action. All methods inherited from -``scrapy.logformatter.LogFormatter`` in your custom log formatting class must return a dictionary listing -the parameters ``level``, ``msg`` and ``args`` which are going to be used for constructing the log message. -Listed below is details of what each key represents : - -* ``level`` is the log level for that action, you can use those from the python logging library: - :setting:`logging.DEBUG`, :setting:`logging.INFO`, :setting:`logging.WARNING`, :setting:`logging.ERROR` - and :setting:`logging.CRITICAL`. - -* ``msg`` should be a string that can contain different formatting placeholders. This string, formatted - with the provided ``args``, is going to be the long message for that action. - -* ``args`` should be a tuple or dict with the formatting placeholders for `msg`. The final log message is - computed as ``msg % args``. - -.. note:: To use custom log formatting class, you must mention it in ``settings.py``, by adding a line - ``LOG_FORMATTER = '’`` +Custom log format can be set for different actions by extending :class:`~scrapy.logformatter.LogFormatter` class +and making :setting:`LOG_FORMATTER` inside ``settings.py`` point to your new class. -.. class:: scrapy.logformatter.LogFormatter - - The default log formatting class in Scrapy. - - .. method:: crawled (request, response, spider) - - ``crawled`` is called to log message when the crawler finds a webpage. - - .. method:: scraped(item, response, spider) - - ``scraped`` is called to log message when an item scraped by a spider. - - .. method:: dropped(item, exception, response, spider) - - ``dropped`` is called to log message when an item is dropped while it is passing through the item pipeline. +.. autoclass:: scrapy.logformatter.LogFormatter + :members: Advanced customization ---------------------- diff --git a/docs/topics/settings.rst b/docs/topics/settings.rst index 0ac26a9bd..1dfb5b8aa 100644 --- a/docs/topics/settings.rst +++ b/docs/topics/settings.rst @@ -866,6 +866,15 @@ directives. .. _Python datetime documentation: https://docs.python.org/2/library/datetime.html#strftime-and-strptime-behavior +.. setting:: LOG_FORMATTER + +LOG_FORMATTER +------------- + +Default: ``scrapy.logformatter.LogFormatter`` + +The class to use for formatting log messages for different actions. + .. setting:: LOG_LEVEL LOG_LEVEL diff --git a/scrapy/logformatter.py b/scrapy/logformatter.py index 075a6d862..0bb8aee58 100644 --- a/scrapy/logformatter.py +++ b/scrapy/logformatter.py @@ -13,25 +13,29 @@ CRAWLEDMSG = u"Crawled (%(status)s) %(request)s%(request_flags)s (referer: %(ref class LogFormatter(object): """Class for generating log messages for different actions. - All methods must return a dictionary listing the parameters `level`, `msg` - and `args` which are going to be used for constructing the log message when - calling logging.log. + All methods must return a dictionary listing the parameters ``level``, ``msg`` + and ``args`` which are going to be used for constructing the log message when + calling ``logging.log``. Dictionary keys for the method outputs: - * `level` should be the log level for that action, you can use those - from the python logging library: logging.DEBUG, logging.INFO, - logging.WARNING, logging.ERROR and logging.CRITICAL. - * `msg` should be a string that can contain different formatting - placeholders. This string, formatted with the provided `args`, is going - to be the log message for that action. + * ``level`` is the log level for that action, you can use those from the + `python logging library `_ : + ``logging.DEBUG``, ``logging.INFO``, ``logging.WARNING``, ``logging.ERROR`` + and ``logging.CRITICAL``. + + * ``msg`` should be a string that can contain different formatting placeholders. This string, formatted + with the provided ``args``, is going to be the long message for that action. + + * ``args`` should be a tuple or dict with the formatting placeholders for ``msg``. The final log message is + computed as ``msg % args``. - * `args` should be a tuple or dict with the formatting placeholders for - `msg`. The final log message is computed as output['msg'] % - output['args']. """ def crawled(self, request, response, spider): + """ + ``crawled`` is called to log message when the crawler finds a webpage. + """ request_flags = ' %s' % str(request.flags) if request.flags else '' response_flags = ' %s' % str(response.flags) if response.flags else '' return { @@ -40,7 +44,7 @@ class LogFormatter(object): 'args': { 'status': response.status, 'request': request, - 'request_flags' : request_flags, + 'request_flags': request_flags, 'referer': referer_str(request), 'response_flags': response_flags, # backward compatibility with Scrapy logformatter below 1.4 version @@ -49,6 +53,9 @@ class LogFormatter(object): } def scraped(self, item, response, spider): + """ + ``scraped`` is called to log message when an item is scraped by a spider. + """ if isinstance(response, Failure): src = response.getErrorMessage() else: @@ -63,6 +70,9 @@ class LogFormatter(object): } def dropped(self, item, exception, response, spider): + """ + ``dropped`` is called to log message when an item is dropped while it is passing through the item pipeline. + """ return { 'level': logging.WARNING, 'msg': DROPPEDMSG, From 4ef38d925e0ded380a7cebabe3aab2340d4f3d37 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Adri=C3=A1n=20Chaves?= Date: Fri, 8 Mar 2019 14:21:00 +0100 Subject: [PATCH 270/889] Remove the unexisting retry_complete signal from the documentation --- docs/topics/downloader-middleware.rst | 2 -- scrapy/downloadermiddlewares/retry.py | 4 +--- 2 files changed, 1 insertion(+), 5 deletions(-) diff --git a/docs/topics/downloader-middleware.rst b/docs/topics/downloader-middleware.rst index 8dbe249fa..9988ab18b 100644 --- a/docs/topics/downloader-middleware.rst +++ b/docs/topics/downloader-middleware.rst @@ -834,8 +834,6 @@ RetryMiddleware Failed pages are collected on the scraping process and rescheduled at the end, once the spider has finished crawling all regular (non failed) pages. -Once there are no more failed pages to retry, this middleware sends a signal -(retry_complete), so other extensions could connect to that signal. The :class:`RetryMiddleware` can be configured through the following settings (see the settings documentation for more info): diff --git a/scrapy/downloadermiddlewares/retry.py b/scrapy/downloadermiddlewares/retry.py index 07e979628..dbc605a4c 100644 --- a/scrapy/downloadermiddlewares/retry.py +++ b/scrapy/downloadermiddlewares/retry.py @@ -7,9 +7,7 @@ RETRY_TIMES - how many times to retry a failed page RETRY_HTTP_CODES - which HTTP response codes to retry Failed pages are collected on the scraping process and rescheduled at the end, -once the spider has finished crawling all regular (non failed) pages. Once -there is no more failed pages to retry this middleware sends a signal -(retry_complete), so other extensions could connect to that signal. +once the spider has finished crawling all regular (non failed) pages. """ import logging From e108e3adbfa1a1f9bdd2a84180f18e5e43a39d01 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Adri=C3=A1n=20Chaves?= Date: Fri, 8 Mar 2019 15:13:11 +0100 Subject: [PATCH 271/889] Clarify the documentation of DEPTH_PRIORITY further --- docs/topics/settings.rst | 16 ++++++++-------- 1 file changed, 8 insertions(+), 8 deletions(-) diff --git a/docs/topics/settings.rst b/docs/topics/settings.rst index 0ac26a9bd..229a9e956 100644 --- a/docs/topics/settings.rst +++ b/docs/topics/settings.rst @@ -331,16 +331,16 @@ Default: ``0`` Scope: ``scrapy.spidermiddlewares.depth.DepthMiddleware`` -An integer that is used to adjust the request priority based on its depth: +An integer that is used to adjust the :attr:`~scrapy.http.Request.priority` of +a :class:`~scrapy.http.Request` based on its depth. -- if zero (default), no priority adjustment is made from depth -- **a positive value will decrease the priority, i.e. higher depth - requests will be processed later** ; this is commonly used when doing - breadth-first crawls (BFO) -- a negative value will increase priority, i.e., higher depth requests - will be processed sooner (DFO) +The priority of a request is adjusted as follows:: -See also: :ref:`faq-bfo-dfo` about tuning Scrapy for BFO or DFO. + request.priority = request.priority - ( depth * DEPTH_PRIORITY ) + +As depth increases, positive values of ``DEPTH_PRIORITY`` decrease request +priority (BFO), while negative values increase request priority (DFO). See +also :ref:`faq-bfo-dfo`. .. note:: From b1063d9b2ca1a6bfb947fdd8b0158633184114ac Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Adri=C3=A1n=20Chaves?= Date: Fri, 8 Mar 2019 17:22:49 +0100 Subject: [PATCH 272/889] Use the description from README.rst on index.rst --- docs/index.rst | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/docs/index.rst b/docs/index.rst index 0a96aa88e..cedde8f38 100644 --- a/docs/index.rst +++ b/docs/index.rst @@ -4,7 +4,13 @@ Scrapy |version| documentation ============================== -This documentation contains everything you need to know about Scrapy. +Scrapy is a fast high-level `web crawling`_ and `web scraping`_ framework, used +to crawl websites and extract structured data from their pages. It can be used +for a wide range of purposes, from data mining to monitoring and automated +testing. + +.. _web crawling: https://en.wikipedia.org/wiki/Web_crawler +.. _web scraping: https://en.wikipedia.org/wiki/Web_scraping Getting help ============ From 91aec8b3bb805e9595f1b778fb14f703c6acf2e2 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Adri=C3=A1n=20Chaves?= Date: Fri, 8 Mar 2019 18:19:30 +0100 Subject: [PATCH 273/889] Update developer-tools.rst Fixes #3674 --- docs/topics/developer-tools.rst | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/docs/topics/developer-tools.rst b/docs/topics/developer-tools.rst index c1976258d..82857c9da 100644 --- a/docs/topics/developer-tools.rst +++ b/docs/topics/developer-tools.rst @@ -233,7 +233,7 @@ also request each page to get every quote on the site:: name = 'quote' allowed_domains = ['quotes.toscrape.com'] page = 1 - start_urls = ['http://quotes.toscrape.com/api/quotes?page=1] + start_urls = ['http://quotes.toscrape.com/api/quotes?page=1'] def parse(self, response): data = json.loads(response.text) From 82049e9c41f878d84f0fe10f827c6fe2a33f7ba6 Mon Sep 17 00:00:00 2001 From: Anubhav Patel Date: Sun, 10 Mar 2019 20:14:55 +0530 Subject: [PATCH 274/889] make suggested changes. --- docs/topics/logging.rst | 10 ++++++---- docs/topics/settings.rst | 4 ++-- scrapy/logformatter.py | 26 +++++++++++++++++--------- 3 files changed, 25 insertions(+), 15 deletions(-) diff --git a/docs/topics/logging.rst b/docs/topics/logging.rst index 72f24bae6..006530a8c 100644 --- a/docs/topics/logging.rst +++ b/docs/topics/logging.rst @@ -193,11 +193,13 @@ to override some of the Scrapy settings regarding logging. Module `logging.handlers `_ Further documentation on available handlers -Custom Log Formats -------------------- +.. _custom-log-formats: -Custom log format can be set for different actions by extending :class:`~scrapy.logformatter.LogFormatter` class -and making :setting:`LOG_FORMATTER` inside ``settings.py`` point to your new class. +Custom Log Formats +------------------ + +A custom log format can be set for different actions by extending :class:`~scrapy.logformatter.LogFormatter` class +and making :setting:`LOG_FORMATTER` point to your new class. .. autoclass:: scrapy.logformatter.LogFormatter :members: diff --git a/docs/topics/settings.rst b/docs/topics/settings.rst index 1dfb5b8aa..a36c0b34c 100644 --- a/docs/topics/settings.rst +++ b/docs/topics/settings.rst @@ -871,9 +871,9 @@ directives. LOG_FORMATTER ------------- -Default: ``scrapy.logformatter.LogFormatter`` +Default: :class:`scrapy.logformatter.LogFormatter` -The class to use for formatting log messages for different actions. +The class to use for :ref:`formatting log messages ` for different actions. .. setting:: LOG_LEVEL diff --git a/scrapy/logformatter.py b/scrapy/logformatter.py index 0bb8aee58..17c69cba8 100644 --- a/scrapy/logformatter.py +++ b/scrapy/logformatter.py @@ -30,12 +30,24 @@ class LogFormatter(object): * ``args`` should be a tuple or dict with the formatting placeholders for ``msg``. The final log message is computed as ``msg % args``. + Here is an example on how to create a custom log formatter to lower the severity level of the log message + when an item is dropped from the pipeline:: + + class PoliteLogFormatter(logformatter.LogFormatter): + def dropped(self, item, exception, response, spider): + return { + 'level': logging.INFO, # lowering the level from logging.WARNING + 'msg': u"Dropped: %(exception)s" + os.linesep + "%(item)s", + 'args': { + 'exception': exception, + 'item': item, + } + } + """ def crawled(self, request, response, spider): - """ - ``crawled`` is called to log message when the crawler finds a webpage. - """ + """Logs a message when the crawler finds a webpage.""" request_flags = ' %s' % str(request.flags) if request.flags else '' response_flags = ' %s' % str(response.flags) if response.flags else '' return { @@ -53,9 +65,7 @@ class LogFormatter(object): } def scraped(self, item, response, spider): - """ - ``scraped`` is called to log message when an item is scraped by a spider. - """ + """Logs a message when an item is scraped by a spider.""" if isinstance(response, Failure): src = response.getErrorMessage() else: @@ -70,9 +80,7 @@ class LogFormatter(object): } def dropped(self, item, exception, response, spider): - """ - ``dropped`` is called to log message when an item is dropped while it is passing through the item pipeline. - """ + """Logs a message when an item is dropped while it is passing through the item pipeline.""" return { 'level': logging.WARNING, 'msg': DROPPEDMSG, From e9cd4ee03aa41e27bea0408b10970ec5bedf35d3 Mon Sep 17 00:00:00 2001 From: Anubhav Patel Date: Sun, 10 Mar 2019 20:37:56 +0530 Subject: [PATCH 275/889] fix list alignment and line width --- scrapy/logformatter.py | 23 +++++++++++------------ 1 file changed, 11 insertions(+), 12 deletions(-) diff --git a/scrapy/logformatter.py b/scrapy/logformatter.py index 17c69cba8..717120242 100644 --- a/scrapy/logformatter.py +++ b/scrapy/logformatter.py @@ -19,19 +19,18 @@ class LogFormatter(object): Dictionary keys for the method outputs: - * ``level`` is the log level for that action, you can use those from the - `python logging library `_ : - ``logging.DEBUG``, ``logging.INFO``, ``logging.WARNING``, ``logging.ERROR`` - and ``logging.CRITICAL``. + * ``level`` is the log level for that action, you can use those from the + `python logging library `_ : + ``logging.DEBUG``, ``logging.INFO``, ``logging.WARNING``, ``logging.ERROR`` + and ``logging.CRITICAL``. + * ``msg`` should be a string that can contain different formatting placeholders. + This string, formatted with the provided ``args``, is going to be the long message + for that action. + * ``args`` should be a tuple or dict with the formatting placeholders for ``msg``. + The final log message is computed as ``msg % args``. - * ``msg`` should be a string that can contain different formatting placeholders. This string, formatted - with the provided ``args``, is going to be the long message for that action. - - * ``args`` should be a tuple or dict with the formatting placeholders for ``msg``. The final log message is - computed as ``msg % args``. - - Here is an example on how to create a custom log formatter to lower the severity level of the log message - when an item is dropped from the pipeline:: + Here is an example on how to create a custom log formatter to lower the severity level of + the log message when an item is dropped from the pipeline:: class PoliteLogFormatter(logformatter.LogFormatter): def dropped(self, item, exception, response, spider): From 43fd6229684b3ccca564524fc92faf009a8c4c97 Mon Sep 17 00:00:00 2001 From: Eugenio Lacuesta Date: Wed, 13 Mar 2019 10:21:50 +0000 Subject: [PATCH 276/889] Rule.process_request: optionally take a Response object --- scrapy/spiders/crawl.py | 17 ++++++++++++++--- 1 file changed, 14 insertions(+), 3 deletions(-) diff --git a/scrapy/spiders/crawl.py b/scrapy/spiders/crawl.py index e5ac72e18..5aec0fd83 100644 --- a/scrapy/spiders/crawl.py +++ b/scrapy/spiders/crawl.py @@ -24,12 +24,23 @@ class Rule(object): self.callback = callback self.cb_kwargs = cb_kwargs or {} self.process_links = process_links - self.process_request = process_request + self.process_request_function = process_request if follow is None: self.follow = False if callback else True else: self.follow = follow + def process_request(self, request, response): + """ + Wrapper around the request processing function to maintain backward compatibility + with functions that do not take a Response object as parameter. + """ + argcount = self.process_request_function.__code__.co_argcount + if getattr(self.process_request_function, '__self__', None): + argcount = argcount - 1 + args = [request] if argcount == 1 else [request, response] + return self.process_request_function(*args) + class CrawlSpider(Spider): @@ -65,7 +76,7 @@ class CrawlSpider(Spider): for link in links: seen.add(link) r = self._build_request(n, link) - yield rule.process_request(r) + yield rule.process_request(r, response) def _response_downloaded(self, response): rule = self._rules[response.meta['rule']] @@ -93,7 +104,7 @@ class CrawlSpider(Spider): for rule in self._rules: rule.callback = get_method(rule.callback) rule.process_links = get_method(rule.process_links) - rule.process_request = get_method(rule.process_request) + rule.process_request_function = get_method(rule.process_request_function) @classmethod def from_crawler(cls, crawler, *args, **kwargs): From 22fda61d62a2b230b0e8588eabb0d71cb77141b7 Mon Sep 17 00:00:00 2001 From: Eugenio Lacuesta Date: Wed, 13 Mar 2019 10:54:38 +0000 Subject: [PATCH 277/889] Rule.process_request: tests --- tests/test_spider.py | 98 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 98 insertions(+) diff --git a/tests/test_spider.py b/tests/test_spider.py index fefdaa403..5e20e0d99 100644 --- a/tests/test_spider.py +++ b/tests/test_spider.py @@ -263,6 +263,104 @@ class CrawlSpiderTest(SpiderTest): 'http://example.org/about.html', 'http://example.org/nofollow.html']) + def test_process_request(self): + + response = HtmlResponse("http://example.org/somepage/index.html", body=self.test_body) + + def process_request_change_domain(request): + return request.replace(url=request.url.replace('.org', '.com')) + + class _CrawlSpider(self.spider_class): + name="test" + allowed_domains=['example.org'] + rules = ( + Rule(LinkExtractor(), process_request=process_request_change_domain), + ) + + spider = _CrawlSpider() + output = list(spider._requests_to_follow(response)) + self.assertEqual(len(output), 3) + self.assertTrue(all(map(lambda r: isinstance(r, Request), output))) + self.assertEqual([r.url for r in output], + ['http://example.com/somepage/item/12.html', + 'http://example.com/about.html', + 'http://example.com/nofollow.html']) + + def test_process_request_with_response(self): + + response = HtmlResponse("http://example.org/somepage/index.html", body=self.test_body) + + def process_request_meta_response_class(request, response): + request.meta['response_class'] = response.__class__.__name__ + return request + + class _CrawlSpider(self.spider_class): + name="test" + allowed_domains=['example.org'] + rules = ( + Rule(LinkExtractor(), process_request=process_request_meta_response_class), + ) + + spider = _CrawlSpider() + output = list(spider._requests_to_follow(response)) + self.assertEqual(len(output), 3) + self.assertTrue(all(map(lambda r: isinstance(r, Request), output))) + self.assertEqual([r.url for r in output], + ['http://example.org/somepage/item/12.html', + 'http://example.org/about.html', + 'http://example.org/nofollow.html']) + self.assertEqual([r.meta['response_class'] for r in output], + ['HtmlResponse', 'HtmlResponse', 'HtmlResponse']) + + def test_process_request_instance_method(self): + + response = HtmlResponse("http://example.org/somepage/index.html", body=self.test_body) + + class _CrawlSpider(self.spider_class): + name="test" + allowed_domains=['example.org'] + rules = ( + Rule(LinkExtractor(), process_request='process_request_upper'), + ) + + def process_request_upper(self, request): + return request.replace(url=request.url.upper()) + + spider = _CrawlSpider() + output = list(spider._requests_to_follow(response)) + self.assertEqual(len(output), 3) + self.assertTrue(all(map(lambda r: isinstance(r, Request), output))) + self.assertEqual([r.url for r in output], + ['http://EXAMPLE.ORG/SOMEPAGE/ITEM/12.HTML', + 'http://EXAMPLE.ORG/ABOUT.HTML', + 'http://EXAMPLE.ORG/NOFOLLOW.HTML']) + + def test_process_request_instance_method_with_response(self): + + response = HtmlResponse("http://example.org/somepage/index.html", body=self.test_body) + + class _CrawlSpider(self.spider_class): + name="test" + allowed_domains=['example.org'] + rules = ( + Rule(LinkExtractor(), process_request='process_request_meta_response_class'), + ) + + def process_request_meta_response_class(self, request, response): + request.meta['response_class'] = response.__class__.__name__ + return request + + spider = _CrawlSpider() + output = list(spider._requests_to_follow(response)) + self.assertEqual(len(output), 3) + self.assertTrue(all(map(lambda r: isinstance(r, Request), output))) + self.assertEqual([r.url for r in output], + ['http://example.org/somepage/item/12.html', + 'http://example.org/about.html', + 'http://example.org/nofollow.html']) + self.assertEqual([r.meta['response_class'] for r in output], + ['HtmlResponse', 'HtmlResponse', 'HtmlResponse']) + def test_follow_links_attribute_population(self): crawler = get_crawler() spider = self.spider_class.from_crawler(crawler, 'example.com') From b30ca379b6785c7ceb75e12285fe7865b4f607d1 Mon Sep 17 00:00:00 2001 From: Eugenio Lacuesta Date: Wed, 13 Mar 2019 11:02:51 +0000 Subject: [PATCH 278/889] Rule.process_request: docs --- docs/topics/spiders.rst | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) diff --git a/docs/topics/spiders.rst b/docs/topics/spiders.rst index 742a88659..24b6f7ec9 100644 --- a/docs/topics/spiders.rst +++ b/docs/topics/spiders.rst @@ -402,10 +402,12 @@ Crawling rules of links extracted from each response using the specified ``link_extractor``. This is mainly used for filtering purposes. - ``process_request`` is a callable, or a string (in which case a method from - the spider object with that name will be used) which will be called with - every request extracted by this rule, and must return a request or None (to - filter out the request). + ``process_request`` is a callable (or a string, in which case a method from + the spider object with that name will be used) which will be called for + every request extracted by this rule. This callable should take a Request object + as first positional argument and, optionally, the Response object from which the + Request originated as second positional argument. It must return a request or None + (to filter out the request). CrawlSpider example ~~~~~~~~~~~~~~~~~~~ From 83ec947fe732035e147c21df352e199ce2cce5c8 Mon Sep 17 00:00:00 2001 From: Eugenio Lacuesta Date: Wed, 13 Mar 2019 11:23:51 +0000 Subject: [PATCH 279/889] Rule.process_request defaults to None in the docs --- scrapy/spiders/crawl.py | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/scrapy/spiders/crawl.py b/scrapy/spiders/crawl.py index 5aec0fd83..ad86fc19d 100644 --- a/scrapy/spiders/crawl.py +++ b/scrapy/spiders/crawl.py @@ -19,12 +19,12 @@ def identity(x): class Rule(object): - def __init__(self, link_extractor, callback=None, cb_kwargs=None, follow=None, process_links=None, process_request=identity): + def __init__(self, link_extractor, callback=None, cb_kwargs=None, follow=None, process_links=None, process_request=None): self.link_extractor = link_extractor self.callback = callback self.cb_kwargs = cb_kwargs or {} self.process_links = process_links - self.process_request_function = process_request + self.process_request_function = process_request or identity if follow is None: self.follow = False if callback else True else: From a2ff647aace899982bd494d73fea5a7c35ded722 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Adri=C3=A1n=20Chaves?= Date: Fri, 15 Mar 2019 06:36:15 +0100 Subject: [PATCH 280/889] Remove docs/topics/ubuntu.rst --- docs/topics/ubuntu.rst | 41 ----------------------------------------- 1 file changed, 41 deletions(-) delete mode 100644 docs/topics/ubuntu.rst diff --git a/docs/topics/ubuntu.rst b/docs/topics/ubuntu.rst deleted file mode 100644 index 6c993a970..000000000 --- a/docs/topics/ubuntu.rst +++ /dev/null @@ -1,41 +0,0 @@ -:orphan: Ubuntu packages are obsolete - -.. _topics-ubuntu: - -=============== -Ubuntu packages -=============== - -.. versionadded:: 0.10 - -`Scrapinghub`_ publishes apt-gettable packages which are generally fresher than -those in Ubuntu, and more stable too since they're continuously built from -`GitHub repo`_ (master & stable branches) and so they contain the latest bug -fixes. - -.. caution:: These packages are currently not updated and may not work on - Ubuntu 16.04 and above, see :issue:`2076` and :issue:`2137`. - -To use the packages: - -1. Import the GPG key used to sign Scrapy packages into APT keyring:: - - sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv 627220E7 - -2. Create ``/etc/apt/sources.list.d/scrapy.list`` file using the following command:: - - echo 'deb http://archive.scrapy.org/ubuntu scrapy main' | sudo tee /etc/apt/sources.list.d/scrapy.list - -3. Update package lists and install the scrapy package: - - .. parsed-literal:: - - sudo apt-get update && sudo apt-get install scrapy - -.. note:: Repeat step 3 if you are trying to upgrade Scrapy. - -.. warning:: ``python-scrapy`` is a different package provided by official debian - repositories, it's very outdated and it isn't supported by Scrapy team. - -.. _Scrapinghub: https://scrapinghub.com/ -.. _GitHub repo: https://github.com/scrapy/scrapy From 01ed605d02013b1d7955369562b2443d2a561599 Mon Sep 17 00:00:00 2001 From: Eugenio Lacuesta Date: Fri, 15 Mar 2019 16:54:14 +0000 Subject: [PATCH 281/889] PEP8 changes to test_spider.py --- tests/test_spider.py | 60 +++++++++++++++++++++----------------------- 1 file changed, 29 insertions(+), 31 deletions(-) diff --git a/tests/test_spider.py b/tests/test_spider.py index 5e20e0d99..c9af7a2d7 100644 --- a/tests/test_spider.py +++ b/tests/test_spider.py @@ -105,11 +105,11 @@ class SpiderTest(unittest.TestCase): def test_logger(self): spider = self.spider_class('example.com') - with LogCapture() as l: + with LogCapture() as lc: spider.logger.info('test log msg') - l.check(('example.com', 'INFO', 'test log msg')) + lc.check(('example.com', 'INFO', 'test log msg')) - record = l.records[0] + record = lc.records[0] self.assertIn('spider', record.__dict__) self.assertIs(record.spider, spider) @@ -190,12 +190,11 @@ class CrawlSpiderTest(SpiderTest): def test_process_links(self): - response = HtmlResponse("http://example.org/somepage/index.html", - body=self.test_body) + response = HtmlResponse("http://example.org/somepage/index.html", body=self.test_body) class _CrawlSpider(self.spider_class): - name="test" - allowed_domains=['example.org'] + name = "test" + allowed_domains = ['example.org'] rules = ( Rule(LinkExtractor(), process_links="dummy_process_links"), ) @@ -208,24 +207,24 @@ class CrawlSpiderTest(SpiderTest): self.assertEqual(len(output), 3) self.assertTrue(all(map(lambda r: isinstance(r, Request), output))) self.assertEqual([r.url for r in output], - ['http://example.org/somepage/item/12.html', - 'http://example.org/about.html', - 'http://example.org/nofollow.html']) + ['http://example.org/somepage/item/12.html', + 'http://example.org/about.html', + 'http://example.org/nofollow.html']) def test_process_links_filter(self): - response = HtmlResponse("http://example.org/somepage/index.html", - body=self.test_body) + response = HtmlResponse("http://example.org/somepage/index.html", body=self.test_body) class _CrawlSpider(self.spider_class): import re - name="test" - allowed_domains=['example.org'] + name = "test" + allowed_domains = ['example.org'] rules = ( Rule(LinkExtractor(), process_links="filter_process_links"), ) _test_regex = re.compile('nofollow') + def filter_process_links(self, links): return [link for link in links if not self._test_regex.search(link.url)] @@ -235,17 +234,16 @@ class CrawlSpiderTest(SpiderTest): self.assertEqual(len(output), 2) self.assertTrue(all(map(lambda r: isinstance(r, Request), output))) self.assertEqual([r.url for r in output], - ['http://example.org/somepage/item/12.html', - 'http://example.org/about.html']) + ['http://example.org/somepage/item/12.html', + 'http://example.org/about.html']) def test_process_links_generator(self): - response = HtmlResponse("http://example.org/somepage/index.html", - body=self.test_body) + response = HtmlResponse("http://example.org/somepage/index.html", body=self.test_body) class _CrawlSpider(self.spider_class): - name="test" - allowed_domains=['example.org'] + name = "test" + allowed_domains = ['example.org'] rules = ( Rule(LinkExtractor(), process_links="dummy_process_links"), ) @@ -259,9 +257,9 @@ class CrawlSpiderTest(SpiderTest): self.assertEqual(len(output), 3) self.assertTrue(all(map(lambda r: isinstance(r, Request), output))) self.assertEqual([r.url for r in output], - ['http://example.org/somepage/item/12.html', - 'http://example.org/about.html', - 'http://example.org/nofollow.html']) + ['http://example.org/somepage/item/12.html', + 'http://example.org/about.html', + 'http://example.org/nofollow.html']) def test_process_request(self): @@ -271,8 +269,8 @@ class CrawlSpiderTest(SpiderTest): return request.replace(url=request.url.replace('.org', '.com')) class _CrawlSpider(self.spider_class): - name="test" - allowed_domains=['example.org'] + name = "test" + allowed_domains = ['example.org'] rules = ( Rule(LinkExtractor(), process_request=process_request_change_domain), ) @@ -295,8 +293,8 @@ class CrawlSpiderTest(SpiderTest): return request class _CrawlSpider(self.spider_class): - name="test" - allowed_domains=['example.org'] + name = "test" + allowed_domains = ['example.org'] rules = ( Rule(LinkExtractor(), process_request=process_request_meta_response_class), ) @@ -317,8 +315,8 @@ class CrawlSpiderTest(SpiderTest): response = HtmlResponse("http://example.org/somepage/index.html", body=self.test_body) class _CrawlSpider(self.spider_class): - name="test" - allowed_domains=['example.org'] + name = "test" + allowed_domains = ['example.org'] rules = ( Rule(LinkExtractor(), process_request='process_request_upper'), ) @@ -340,8 +338,8 @@ class CrawlSpiderTest(SpiderTest): response = HtmlResponse("http://example.org/somepage/index.html", body=self.test_body) class _CrawlSpider(self.spider_class): - name="test" - allowed_domains=['example.org'] + name = "test" + allowed_domains = ['example.org'] rules = ( Rule(LinkExtractor(), process_request='process_request_meta_response_class'), ) From 645e8d16a4c966b50bd39667aaef28dc1eeb43b8 Mon Sep 17 00:00:00 2001 From: Eugenio Lacuesta Date: Fri, 15 Mar 2019 22:20:36 +0000 Subject: [PATCH 282/889] Count keyword argument checks --- tests/spiders.py | 21 +++++++++++++-------- tests/test_crawl.py | 3 ++- 2 files changed, 15 insertions(+), 9 deletions(-) diff --git a/tests/spiders.py b/tests/spiders.py index 5a1471072..7b4707f62 100644 --- a/tests/spiders.py +++ b/tests/spiders.py @@ -31,7 +31,7 @@ class MetaSpider(MockServerSpider): class KeywordArgumentsSpider(MockServerSpider): name = 'kwargs' - checks = set() + checks = list() def start_requests(self): data = {'key': 'value', 'number': 123} @@ -41,25 +41,30 @@ class KeywordArgumentsSpider(MockServerSpider): yield Request(self.mockserver.url('/no_kwargs'), self.parse_no_kwargs) def parse_first(self, response, key, number): - self.checks.add(key == 'value') - self.checks.add(number == 123) + self.checks.append(key == 'value') + self.checks.append(number == 123) + self.crawler.stats.inc_value('boolean_checks', 2) yield response.follow( self.mockserver.url('/two'), self.parse_second, kwargs={'new_key': 'new_value'}) def parse_second(self, response, new_key): - self.checks.add(new_key == 'new_value') + self.checks.append(new_key == 'new_value') + self.crawler.stats.inc_value('boolean_checks') def parse_general(self, response, **kwargs): if response.url.endswith('/general_with'): - self.checks.add(kwargs['key'] == 'value') - self.checks.add(kwargs['number'] == 123) + self.checks.append(kwargs['key'] == 'value') + self.checks.append(kwargs['number'] == 123) + self.crawler.stats.inc_value('boolean_checks', 2) elif response.url.endswith('/general_without'): - self.checks.add(kwargs == {}) + self.checks.append(kwargs == {}) + self.crawler.stats.inc_value('boolean_checks') def parse_no_kwargs(self, response): - pass + self.checks.append(response.url.endswith('/no_kwargs')) + self.crawler.stats.inc_value('boolean_checks') class FollowAllSpider(MetaSpider): diff --git a/tests/test_crawl.py b/tests/test_crawl.py index 3879a017c..9a39b8cb4 100644 --- a/tests/test_crawl.py +++ b/tests/test_crawl.py @@ -27,7 +27,8 @@ class CrawlTestCase(TestCase): def test_callback_kwargs(self): crawler = self.runner.create_crawler(KeywordArgumentsSpider) yield crawler.crawl(mockserver=self.mockserver) - self.assertEqual(crawler.spider.checks, set([True])) + self.assertTrue(all(crawler.spider.checks)) + self.assertEqual(len(crawler.spider.checks), crawler.stats.get_value('boolean_checks')) @defer.inlineCallbacks def test_follow_all(self): From 6760bca74b1f51ce83ed73318d5ddcef03c9d129 Mon Sep 17 00:00:00 2001 From: Eugenio Lacuesta Date: Fri, 15 Mar 2019 22:32:45 +0000 Subject: [PATCH 283/889] Rename Request.kwargs to Request.cb_kwargs --- docs/topics/request-response.rst | 16 ++++++++-------- scrapy/core/scraper.py | 4 +++- scrapy/http/request/__init__.py | 14 +++++++------- scrapy/http/response/__init__.py | 4 ++-- scrapy/http/response/text.py | 4 ++-- scrapy/utils/reqser.py | 4 ++-- tests/spiders.py | 6 +++--- tests/test_http_request.py | 8 ++++---- tests/test_utils_reqser.py | 4 ++-- 9 files changed, 33 insertions(+), 31 deletions(-) diff --git a/docs/topics/request-response.rst b/docs/topics/request-response.rst index d12766676..b3f849540 100644 --- a/docs/topics/request-response.rst +++ b/docs/topics/request-response.rst @@ -24,7 +24,7 @@ below in :ref:`topics-request-response-ref-request-subclasses` and Request objects =============== -.. class:: Request(url[, callback, method='GET', headers, body, cookies, meta, encoding='utf-8', priority=0, dont_filter=False, errback, flags, kwargs]) +.. class:: Request(url[, callback, method='GET', headers, body, cookies, meta, encoding='utf-8', priority=0, dont_filter=False, errback, flags, cb_kwargs]) A :class:`Request` object represents an HTTP request, which is usually generated in the Spider and executed by the Downloader, and thus generating @@ -126,8 +126,8 @@ Request objects :param flags: Flags sent to the request, can be used for logging or similar purposes. :type flags: list - :param kwargs: A dict with arbitrary data that will be passed as keyword arguments to the Request's callback. - :type kwargs: dict + :param cb_kwargs: A dict with arbitrary data that will be passed as keyword arguments to the Request's callback. + :type cb_kwargs: dict .. attribute:: Request.url @@ -168,7 +168,7 @@ Request objects ``copy()`` or ``replace()`` methods, and can also be accessed, in your spider, from the ``response.meta`` attribute. - .. attribute:: Request.kwargs + .. attribute:: Request.cb_kwargs A dictionary that contains arbitrary metadata for this request. Its contents will be passed to the Request's callback as keyword arguments. It is empty @@ -177,7 +177,7 @@ Request objects This dict is `shallow copied`_ when the request is cloned using the ``copy()`` or ``replace()`` methods, and can also be accessed, in your - spider, from the ``response.kwargs`` attribute. + spider, from the ``response.cb_kwargs`` attribute. .. _shallow copied: https://docs.python.org/2/library/copy.html @@ -216,7 +216,7 @@ Example:: In some cases you may be interested in passing arguments to those callback functions so you can receive the arguments later, in the second callback. The following two examples show how to achieve this by using the -:attr:`Request.meta` and :attr:`Request.kwargs` attributes respectively:: +:attr:`Request.meta` and :attr:`Request.cb_kwargs` attributes respectively:: def parse_page1(self, response): item = MyItem() @@ -238,8 +238,8 @@ The following two examples show how to achieve this by using the item['main_url'] = response.url request = scrapy.Request("http://www.example.com/some_page.html", callback=self.parse_page2) - request.kwargs['item'] = item - request.kwargs['foo'] = 'bar' + request.cb_kwargs['item'] = item + request.cb_kwargs['foo'] = 'bar' yield request def parse_page2(self, response, item, foo): diff --git a/scrapy/core/scraper.py b/scrapy/core/scraper.py index 7981ce231..08dd1acc5 100644 --- a/scrapy/core/scraper.py +++ b/scrapy/core/scraper.py @@ -143,7 +143,9 @@ class Scraper(object): def call_spider(self, result, request, spider): result.request = request dfd = defer_result(result) - dfd.addCallbacks(request.callback or spider.parse, request.errback, callbackKeywords=request.kwargs) + dfd.addCallbacks(callback=request.callback or spider.parse, + errback=request.errback, + callbackKeywords=request.cb_kwargs) return dfd.addCallback(iterate_spider_output) def handle_spider_error(self, _failure, request, response, spider): diff --git a/scrapy/http/request/__init__.py b/scrapy/http/request/__init__.py index c016eb727..f5935c4ef 100644 --- a/scrapy/http/request/__init__.py +++ b/scrapy/http/request/__init__.py @@ -18,7 +18,7 @@ class Request(object_ref): def __init__(self, url, callback=None, method='GET', headers=None, body=None, cookies=None, meta=None, encoding='utf-8', priority=0, - dont_filter=False, errback=None, flags=None, kwargs=None): + dont_filter=False, errback=None, flags=None, cb_kwargs=None): self._encoding = encoding # this one has to be set first self.method = str(method).upper() @@ -40,14 +40,14 @@ class Request(object_ref): self.dont_filter = dont_filter self._meta = dict(meta) if meta else None - self._kwargs = dict(kwargs) if kwargs else None + self._cb_kwargs = dict(cb_kwargs) if cb_kwargs else None self.flags = [] if flags is None else list(flags) @property - def kwargs(self): - if self._kwargs is None: - self._kwargs = {} - return self._kwargs + def cb_kwargs(self): + if self._cb_kwargs is None: + self._cb_kwargs = {} + return self._cb_kwargs @property def meta(self): @@ -99,7 +99,7 @@ class Request(object_ref): given new values. """ for x in ['url', 'method', 'headers', 'body', 'cookies', 'meta', 'flags', - 'encoding', 'priority', 'dont_filter', 'callback', 'errback', 'kwargs']: + 'encoding', 'priority', 'dont_filter', 'callback', 'errback', 'cb_kwargs']: kwargs.setdefault(x, getattr(self, x)) cls = kwargs.pop('cls', self.__class__) return cls(*args, **kwargs) diff --git a/scrapy/http/response/__init__.py b/scrapy/http/response/__init__.py index 99b04a26e..b0a526b72 100644 --- a/scrapy/http/response/__init__.py +++ b/scrapy/http/response/__init__.py @@ -106,7 +106,7 @@ class Response(object_ref): def follow(self, url, callback=None, method='GET', headers=None, body=None, cookies=None, meta=None, encoding='utf-8', priority=0, - dont_filter=False, errback=None, kwargs=None): + dont_filter=False, errback=None, cb_kwargs=None): # type: (...) -> Request """ Return a :class:`~.Request` instance to follow a link ``url``. @@ -133,4 +133,4 @@ class Response(object_ref): priority=priority, dont_filter=dont_filter, errback=errback, - kwargs=kwargs) + cb_kwargs=cb_kwargs) diff --git a/scrapy/http/response/text.py b/scrapy/http/response/text.py index 2039621b3..339913d4e 100644 --- a/scrapy/http/response/text.py +++ b/scrapy/http/response/text.py @@ -123,7 +123,7 @@ class TextResponse(Response): def follow(self, url, callback=None, method='GET', headers=None, body=None, cookies=None, meta=None, encoding=None, priority=0, - dont_filter=False, errback=None, kwargs=None): + dont_filter=False, errback=None, cb_kwargs=None): # type: (...) -> Request """ Return a :class:`~.Request` instance to follow a link ``url``. @@ -155,7 +155,7 @@ class TextResponse(Response): priority=priority, dont_filter=dont_filter, errback=errback, - kwargs=kwargs, + cb_kwargs=cb_kwargs, ) diff --git a/scrapy/utils/reqser.py b/scrapy/utils/reqser.py index d537057b1..e7016b92a 100644 --- a/scrapy/utils/reqser.py +++ b/scrapy/utils/reqser.py @@ -33,7 +33,7 @@ def request_to_dict(request, spider=None): 'priority': request.priority, 'dont_filter': request.dont_filter, 'flags': request.flags, - 'kwargs': request.kwargs, + 'cb_kwargs': request.cb_kwargs, } if type(request) is not Request: d['_class'] = request.__module__ + '.' + request.__class__.__name__ @@ -66,7 +66,7 @@ def request_from_dict(d, spider=None): priority=d['priority'], dont_filter=d['dont_filter'], flags=d.get('flags'), - kwargs=d.get('kwargs'), + cb_kwargs=d.get('cb_kwargs'), ) diff --git a/tests/spiders.py b/tests/spiders.py index 7b4707f62..a06985837 100644 --- a/tests/spiders.py +++ b/tests/spiders.py @@ -35,8 +35,8 @@ class KeywordArgumentsSpider(MockServerSpider): def start_requests(self): data = {'key': 'value', 'number': 123} - yield Request(self.mockserver.url('/first'), self.parse_first, kwargs=data) - yield Request(self.mockserver.url('/general_with'), self.parse_general, kwargs=data) + yield Request(self.mockserver.url('/first'), self.parse_first, cb_kwargs=data) + yield Request(self.mockserver.url('/general_with'), self.parse_general, cb_kwargs=data) yield Request(self.mockserver.url('/general_without'), self.parse_general) yield Request(self.mockserver.url('/no_kwargs'), self.parse_no_kwargs) @@ -47,7 +47,7 @@ class KeywordArgumentsSpider(MockServerSpider): yield response.follow( self.mockserver.url('/two'), self.parse_second, - kwargs={'new_key': 'new_value'}) + cb_kwargs={'new_key': 'new_value'}) def parse_second(self, response, new_key): self.checks.append(new_key == 'new_value') diff --git a/tests/test_http_request.py b/tests/test_http_request.py index 610893d8a..c1949a28c 100644 --- a/tests/test_http_request.py +++ b/tests/test_http_request.py @@ -177,7 +177,7 @@ class RequestTest(unittest.TestCase): r1 = self.request_class("http://www.example.com", flags=['f1', 'f2'], callback=somecallback, errback=somecallback) r1.meta['foo'] = 'bar' - r1.kwargs['key'] = 'value' + r1.cb_kwargs['key'] = 'value' r2 = r1.copy() # make sure copy does not propagate callbacks @@ -190,9 +190,9 @@ class RequestTest(unittest.TestCase): assert r1.flags is not r2.flags, "flags must be a shallow copy, not identical" self.assertEqual(r1.flags, r2.flags) - # make sure kwargs dict is shallow copied - assert r1.kwargs is not r2.kwargs, "kwargs must be a shallow copy, not identical" - self.assertEqual(r1.kwargs, r2.kwargs) + # make sure cb_kwargs dict is shallow copied + assert r1.cb_kwargs is not r2.cb_kwargs, "cb_kwargs must be a shallow copy, not identical" + self.assertEqual(r1.cb_kwargs, r2.cb_kwargs) # make sure meta dict is shallow copied assert r1.meta is not r2.meta, "meta must be a shallow copy, not identical" diff --git a/tests/test_utils_reqser.py b/tests/test_utils_reqser.py index 76de20f22..e1601b76b 100644 --- a/tests/test_utils_reqser.py +++ b/tests/test_utils_reqser.py @@ -26,7 +26,7 @@ class RequestSerializationTest(unittest.TestCase): encoding='latin-1', priority=20, meta={'a': 'b'}, - kwargs={'k': 'v'}, + cb_kwargs={'k': 'v'}, flags=['testFlag']) self._assert_serializes_ok(r, spider=self.spider) @@ -53,7 +53,7 @@ class RequestSerializationTest(unittest.TestCase): self.assertEqual(r1.headers, r2.headers) self.assertEqual(r1.cookies, r2.cookies) self.assertEqual(r1.meta, r2.meta) - self.assertEqual(r1.kwargs, r2.kwargs) + self.assertEqual(r1.cb_kwargs, r2.cb_kwargs) self.assertEqual(r1._encoding, r2._encoding) self.assertEqual(r1.priority, r2.priority) self.assertEqual(r1.dont_filter, r2.dont_filter) From 92bbc5290d2b381ea60d68442a887d1ba020874e Mon Sep 17 00:00:00 2001 From: Eugenio Lacuesta Date: Sat, 16 Mar 2019 05:41:40 +0000 Subject: [PATCH 284/889] Rule.process_request - Renaming --- scrapy/spiders/crawl.py | 16 ++++++++-------- 1 file changed, 8 insertions(+), 8 deletions(-) diff --git a/scrapy/spiders/crawl.py b/scrapy/spiders/crawl.py index ad86fc19d..c01f75798 100644 --- a/scrapy/spiders/crawl.py +++ b/scrapy/spiders/crawl.py @@ -24,22 +24,22 @@ class Rule(object): self.callback = callback self.cb_kwargs = cb_kwargs or {} self.process_links = process_links - self.process_request_function = process_request or identity + self.process_request = process_request or identity if follow is None: self.follow = False if callback else True else: self.follow = follow - def process_request(self, request, response): + def _process_request(self, request, response): """ Wrapper around the request processing function to maintain backward compatibility with functions that do not take a Response object as parameter. """ - argcount = self.process_request_function.__code__.co_argcount - if getattr(self.process_request_function, '__self__', None): + argcount = self.process_request.__code__.co_argcount + if hasattr(self.process_request, '__self__'): argcount = argcount - 1 args = [request] if argcount == 1 else [request, response] - return self.process_request_function(*args) + return self.process_request(*args) class CrawlSpider(Spider): @@ -75,8 +75,8 @@ class CrawlSpider(Spider): links = rule.process_links(links) for link in links: seen.add(link) - r = self._build_request(n, link) - yield rule.process_request(r, response) + request = self._build_request(n, link) + yield rule._process_request(request, response) def _response_downloaded(self, response): rule = self._rules[response.meta['rule']] @@ -104,7 +104,7 @@ class CrawlSpider(Spider): for rule in self._rules: rule.callback = get_method(rule.callback) rule.process_links = get_method(rule.process_links) - rule.process_request_function = get_method(rule.process_request_function) + rule.process_request = get_method(rule.process_request) @classmethod def from_crawler(cls, crawler, *args, **kwargs): From 044318920a463d2e04efe2a4c65d8f72d1b5ecb6 Mon Sep 17 00:00:00 2001 From: Anubhav Patel Date: Sun, 17 Mar 2019 16:54:28 +0530 Subject: [PATCH 285/889] doc for creating custom cache storage backend. --- docs/topics/downloader-middleware.rst | 53 +++++++++++++++++++++++++++ 1 file changed, 53 insertions(+) diff --git a/docs/topics/downloader-middleware.rst b/docs/topics/downloader-middleware.rst index 0d976077b..f913b059d 100644 --- a/docs/topics/downloader-middleware.rst +++ b/docs/topics/downloader-middleware.rst @@ -496,6 +496,59 @@ In order to use this storage backend: .. _LevelDB: https://github.com/google/leveldb .. _leveldb python bindings: https://pypi.python.org/pypi/leveldb +.. _httpcache-storage-custom: + +Implementing custom cache storage backend +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +You can implement custom cache storage backend by creating a Python class that +defines the methods described below. + +.. module:: scrapy.extensions.httpcache + +.. class:: CacheStorage + + .. method:: open_spider(spider) + + This method gets called after a spider has been opened for crawling. + + :param spider: the spider which has been opened + :type spider: :class:`~scrapy.spiders.Spider` object + + .. method:: close_spider(spider) + + This method gets called after a spider has been closed. + + :param spider: the spider which has been closed + :type spider: :class:`~scrapy.spiders.Spider` object + + .. method:: retrieve_response(spider, request) + + Returns response if present in cache, or ``None`` otherwise. + + :param spider: the spider which generated the request + :type spider: :class:`~scrapy.spiders.Spider` object + + :param request: the request to find cached reponse for + :type request: :class:`~scrapy.http.Request` object + + .. method:: store_response(spider, request, response) + + Stores the given response in the cache. + + :param spider: the spider for which the response is intended + :type spider: :class:`~scrapy.spiders.Spider` object + + :param request: corresponding request the spider generated + :type request: :class:`~scrapy.http.Request` object + + :param response: the response to store in the cache + :type response: :class:`~scrapy.http.Response` object + +In order to use your storage backend, set: + +* :setting:`HTTPCACHE_STORAGE` to path of your custom storage class. + HTTPCache middleware settings ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ From 70aa5b1333a981b3b5eae70e29144c4c25fcfd4e Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Marc=20Hern=C3=A1ndez?= Date: Wed, 20 Mar 2019 15:32:20 +0100 Subject: [PATCH 286/889] Fix numeration --- docs/topics/selectors.rst | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/docs/topics/selectors.rst b/docs/topics/selectors.rst index edc18f14d..282a585d4 100644 --- a/docs/topics/selectors.rst +++ b/docs/topics/selectors.rst @@ -436,7 +436,7 @@ The following examples show how these methods map to each other. >>> response.css('a::attr(href)').extract() ['image1.html', 'image2.html', 'image3.html', 'image4.html', 'image5.html'] -2. ``Selector.get()`` is the same as ``Selector.extract()``:: +3. ``Selector.get()`` is the same as ``Selector.extract()``:: >>> response.css('a::attr(href)')[0].get() 'image1.html' From 821f5bb26077d7f9a6b2b1a72f210f81779f5393 Mon Sep 17 00:00:00 2001 From: Vostretsov Nikita Date: Mon, 3 Dec 2018 11:00:03 +0000 Subject: [PATCH 287/889] First implementation handle exception use O(N) instead of O(NlogN) here we have request as struct additional check for meptiness small performance improvement do not consume another request test number of responses mark requests back to 3 slots test case raise exceptions in case of missed meta add marks to requests and work only with your own requests only disk queue should obtain signals separate functions for slot rasd/write use signlas without variable stop crawler get signals in correct place logic test for download-aware priority queue update comment for structure ensure text type transform slot name to path use implicit structure use unicode type implicitly use real crawler add signals more slot accounting simple implementation of pop small slot accounting code no need for custom len function ability to call super in py27 add slots generic tests for downloader aware queue dummy implementation of crawler aware priority queue move common logic to base class rename class pass crawler to pqclass constructor do not copy quelib.PriorityQueue code add comment about new class remove obsolete function modify behaviour of queuelib.PriorityQueue to dodge very complex priority better way to get name remove obsolete commentary check boundaries function for priority convertion with known limits correct import path move file do not switch on by deffault as ip concurrency not supported set scheduler slot in case of empty slot use constant single place for added urls single place for constants use as default queue correct format for error text test migration from old version with on disk queue in these tests we have only two inflection points - jobdir and priority_queue_cls we do not need separate mock spider, use usual one do not rely on order of dict elements, imply order of list test round robiness of priority queue add comments and requirements for our magick function remove debug logging put queues into slot as we fabricate priorities we do not need special types anymore fabricate priority for priority queue more versatile priorities Scheduler class is not inflection point wrap correct types check for emptinees before initialization tests for new priority queue correct default type for startprios use exact values put common settings to base class test priorities for disk scheduler test dequeue for disk scheduler test length for disk scheduler setUp/tearDown methods for on disk schedulers new methods remove excessive line base class to handle scheduler creation correct method names test priorities deque test close scheduler on test end enqueue some requests test template for scheduler use downloader slot I/O implementation for RoundRobin queue round-robin implementation without I/O and slot detection wrappers for every disk queue class --- scrapy/core/downloader/__init__.py | 8 +- scrapy/core/queues.py | 15 -- scrapy/core/scheduler.py | 17 +- scrapy/pqueues.py | 246 ++++++++++++++++++++++ tests/test_scheduler.py | 315 +++++++++++++++++++++++++++++ 5 files changed, 578 insertions(+), 23 deletions(-) delete mode 100644 scrapy/core/queues.py create mode 100644 scrapy/pqueues.py create mode 100644 tests/test_scheduler.py diff --git a/scrapy/core/downloader/__init__.py b/scrapy/core/downloader/__init__.py index 59c3ad074..4695d75f4 100644 --- a/scrapy/core/downloader/__init__.py +++ b/scrapy/core/downloader/__init__.py @@ -75,6 +75,8 @@ def _get_concurrency_delay(concurrency, spider, settings): class Downloader(object): + DOWNLOAD_SLOT = 'download_slot' + def __init__(self, crawler): self.settings = crawler.settings self.signals = crawler.signals @@ -111,8 +113,8 @@ class Downloader(object): return key, self.slots[key] def _get_slot_key(self, request, spider): - if 'download_slot' in request.meta: - return request.meta['download_slot'] + if self.DOWNLOAD_SLOT in request.meta: + return request.meta[self.DOWNLOAD_SLOT] key = urlparse_cached(request).hostname or '' if self.ip_concurrency: @@ -122,7 +124,7 @@ class Downloader(object): def _enqueue_request(self, request, spider): key, slot = self._get_slot(request, spider) - request.meta['download_slot'] = key + request.meta[self.DOWNLOAD_SLOT] = key def _deactivate(response): slot.active.remove(request) diff --git a/scrapy/core/queues.py b/scrapy/core/queues.py deleted file mode 100644 index 96d582fc7..000000000 --- a/scrapy/core/queues.py +++ /dev/null @@ -1,15 +0,0 @@ -import uuid -import os.path - - -def unique_files_queue(queue_class): - - class UniqueFilesQueue(queue_class): - def __init__(self, path): - path = path + "-" + uuid.uuid4().hex - while os.path.exists(path): - path = path + "-" + uuid.uuid4().hex - - super().__init__(path) - - return UniqueFilesQueue diff --git a/scrapy/core/scheduler.py b/scrapy/core/scheduler.py index eb790a67e..d40f3aa0c 100644 --- a/scrapy/core/scheduler.py +++ b/scrapy/core/scheduler.py @@ -13,7 +13,7 @@ logger = logging.getLogger(__name__) class Scheduler(object): def __init__(self, dupefilter, jobdir=None, dqclass=None, mqclass=None, - logunser=False, stats=None, pqclass=None): + logunser=False, stats=None, pqclass=None, crawler=None): self.df = dupefilter self.dqdir = self._dqdir(jobdir) self.pqclass = pqclass @@ -21,6 +21,7 @@ class Scheduler(object): self.mqclass = mqclass self.logunser = logunser self.stats = stats + self.crawler = crawler @classmethod def from_crawler(cls, crawler): @@ -32,14 +33,15 @@ class Scheduler(object): mqclass = load_object(settings['SCHEDULER_MEMORY_QUEUE']) logunser = settings.getbool('LOG_UNSERIALIZABLE_REQUESTS', settings.getbool('SCHEDULER_DEBUG')) return cls(dupefilter, jobdir=job_dir(settings), logunser=logunser, - stats=crawler.stats, pqclass=pqclass, dqclass=dqclass, mqclass=mqclass) + stats=crawler.stats, pqclass=pqclass, dqclass=dqclass, + mqclass=mqclass, crawler=crawler) def has_pending_requests(self): return len(self) > 0 def open(self, spider): self.spider = spider - self.mqs = self.pqclass(self._newmq) + self.mqs = create_instance(self.pqclass, None, self.crawler, self._newmq) self.dqs = self._dq() if self.dqdir else None return self.df.open() @@ -111,7 +113,7 @@ class Scheduler(object): return self.mqclass() def _newdq(self, priority): - return self.dqclass(join(self.dqdir, 'p%s' % priority)) + return self.dqclass(join(self.dqdir, 'p%s' % (priority, ))) def _dq(self): activef = join(self.dqdir, 'active.json') @@ -120,7 +122,12 @@ class Scheduler(object): prios = json.load(f) else: prios = () - q = self.pqclass(self._newdq, startprios=prios) + + q = create_instance(self.pqclass, + None, + self.crawler, + self._newdq, + startprios=prios) if q: logger.info("Resuming crawl (%(queuesize)d requests scheduled)", {'queuesize': len(q)}, extra={'spider': self.spider}) diff --git a/scrapy/pqueues.py b/scrapy/pqueues.py new file mode 100644 index 000000000..75073b7a4 --- /dev/null +++ b/scrapy/pqueues.py @@ -0,0 +1,246 @@ +from collections import deque +import hashlib +import logging +from six import text_type +from six.moves.urllib.parse import urlparse + +from queuelib import PriorityQueue + +from scrapy.core.downloader import Downloader +from scrapy.http import Request +from scrapy.signals import request_reached_downloader, response_downloaded + + +logger = logging.getLogger(__name__) + + +SCHEDULER_SLOT_META_KEY = Downloader.DOWNLOAD_SLOT + + +def _get_from_request(request, key, default=None): + if isinstance(request, dict): + return request.get(key, default) + + if isinstance(request, Request): + return getattr(request, key, default) + + raise ValueError('Bad type of request "%s"' % (request.__class__, )) + + +def _scheduler_slot_read(request, default=None): + meta = _get_from_request(request, 'meta', dict()) + slot = meta.get(SCHEDULER_SLOT_META_KEY, default) + return slot + + +def _scheduler_slot_write(request, slot): + meta = _get_from_request(request, 'meta', None) + if not isinstance(meta, dict): + raise ValueError('No meta attribute in %s' % (request, )) + meta[SCHEDULER_SLOT_META_KEY] = slot + + +def _scheduler_slot(request): + + slot = _scheduler_slot_read(request, None) + if slot is None: + url = _get_from_request(request, 'url') + slot = urlparse(url).hostname or '' + _scheduler_slot_write(request, slot) + + return slot + + +def _pathable(x): + pathable_slot = "".join([c if c.isalnum() or c in '-._' else '_' for c in x]) + + """ + as we replace some letters we can get collision for different slots + add we add unique part + """ + unique_slot = hashlib.md5(x.encode('utf8')).hexdigest() + + return '-'.join([pathable_slot, unique_slot]) + + +class PrioritySlot: + __slots__ = ('priority', 'slot') + + def __init__(self, priority=0, slot=None): + self.priority = priority + self.slot = slot + + def __hash__(self): + return hash((self.priority, self.slot)) + + def __eq__(self, other): + return (self.priority, self.slot) == (other.priority, other.slot) + + def __lt__(self, other): + return (self.priority, self.slot) < (other.priority, other.slot) + + def __str__(self): + return '_'.join([text_type(self.priority), _pathable(text_type(self.slot))]) + + +class PriorityAsTupleQueue(PriorityQueue): + """ + Python structures is not directly (de)serialized (to)from json. + We need this modified queue to transform custom structure (from)to + json serializable structures + """ + def __init__(self, qfactory, startprios=()): + + super(PriorityAsTupleQueue, self).__init__( + qfactory, + [PrioritySlot(priority=p[0], slot=p[1]) for p in startprios] + ) + + def close(self): + startprios = super(PriorityAsTupleQueue, self).close() + return [(s.priority, s.slot) for s in startprios] + + def is_empty(self): + return not self.queues or len(self) == 0 + + +class SlotBasedPriorityQueue(object): + + def __init__(self, qfactory, startprios={}): + self.pqueues = dict() # slot -> priority queue + self.qfactory = qfactory # factory for creating new internal queues + + if not startprios: + return + + if not isinstance(startprios, dict): + raise ValueError("Looks like your priorities file malforfemed. " + "Possible reason: You run scrapy with previous " + "version. Interrupted it. Updated scrapy. And " + "run again.") + + for slot, prios in startprios.items(): + self.pqueues[slot] = PriorityAsTupleQueue(self.qfactory, prios) + + def pop_slot(self, slot): + queue = self.pqueues[slot] + request = queue.pop() + is_empty = queue.is_empty() + if is_empty: + del self.pqueues[slot] + + return request, is_empty + + def push_slot(self, request, priority): + slot = _scheduler_slot(request) + is_new = False + if slot not in self.pqueues: + is_new = True + self.pqueues[slot] = PriorityAsTupleQueue(self.qfactory) + self.pqueues[slot].push(request, PrioritySlot(priority=priority, slot=slot)) + return slot, is_new + + def close(self): + startprios = dict() + for slot, queue in self.pqueues.items(): + prios = queue.close() + startprios[slot] = prios + self.pqueues.clear() + return startprios + + def __len__(self): + return sum(len(x) for x in self.pqueues.values()) if self.pqueues else 0 + + +class RoundRobinPriorityQueue(SlotBasedPriorityQueue): + + def __init__(self, qfactory, startprios={}): + super(RoundRobinPriorityQueue, self).__init__(qfactory, startprios) + self._slots = deque() + for slot in self.pqueues: + self._slots.append(slot) + + def push(self, request, priority): + slot, is_new = self.push_slot(request, priority) + if is_new: + self._slots.append(slot) + + def pop(self): + if not self._slots: + return + + slot = self._slots.popleft() + request, is_empty = self.pop_slot(slot) + + if not is_empty: + self._slots.append(slot) + + return request + + def close(self): + self._slots.clear() + return super(RoundRobinPriorityQueue, self).close() + + +class DownloaderAwarePriorityQueue(SlotBasedPriorityQueue): + + _DOWNLOADER_AWARE_PQ_ID = 'DOWNLOADER_AWARE_PQ_ID' + + @classmethod + def from_crawler(cls, crawler, qfactory, startprios={}): + return cls(crawler, qfactory, startprios) + + def __init__(self, crawler, qfactory, startprios={}): + super(DownloaderAwarePriorityQueue, self).__init__(qfactory, startprios) + self._slots = {slot: 0 for slot in self.pqueues} + crawler.signals.connect(self.on_response_download, + signal=response_downloaded) + crawler.signals.connect(self.on_request_reached_downloader, + signal=request_reached_downloader) + + def mark(self, request): + meta = _get_from_request(request, 'meta', None) + if not isinstance(meta, dict): + raise ValueError('No meta attribute in %s' % (request, )) + meta[self._DOWNLOADER_AWARE_PQ_ID] = id(self) + + def check_mark(self, request): + return request.meta.get(self._DOWNLOADER_AWARE_PQ_ID, None) == id(self) + + def pop(self): + slots = [(d, s) for s,d in self._slots.items() if s in self.pqueues] + + if not slots: + return + + slot = min(slots)[1] + request, _ = self.pop_slot(slot) + self.mark(request) + return request + + def push(self, request, priority): + slot, _ = self.push_slot(request, priority) + if slot not in self._slots: + self._slots[slot] = 0 + + def on_response_download(self, response, request, spider): + if not self.check_mark(request): + return + + slot = _scheduler_slot_read(request) + if slot not in self._slots or self._slots[slot] <= 0: + raise ValueError('Get response for wrong slot "%s"' % (slot, )) + self._slots[slot] = self._slots[slot] - 1 + if self._slots[slot] == 0 and slot not in self.pqueues: + del self._slots[slot] + + def on_request_reached_downloader(self, request, spider): + if not self.check_mark(request): + return + + slot = _scheduler_slot_read(request) + self._slots[slot] = self._slots.get(slot, 0) + 1 + + def close(self): + self._slots.clear() + return super(DownloaderAwarePriorityQueue, self).close() diff --git a/tests/test_scheduler.py b/tests/test_scheduler.py new file mode 100644 index 000000000..fd86e8d8c --- /dev/null +++ b/tests/test_scheduler.py @@ -0,0 +1,315 @@ +import contextlib +import shutil +import tempfile +import unittest + +from scrapy.crawler import Crawler +from scrapy.core.scheduler import Scheduler +from scrapy.http import Request +from scrapy.pqueues import _scheduler_slot_read, _scheduler_slot_write +from scrapy.signals import request_reached_downloader, response_downloaded +from scrapy.spiders import Spider + +class MockCrawler(Crawler): + def __init__(self, priority_queue_cls, jobdir): + + settings = dict(LOG_UNSERIALIZABLE_REQUESTS=False, + SCHEDULER_DISK_QUEUE='scrapy.squeues.PickleLifoDiskQueue', + SCHEDULER_MEMORY_QUEUE='scrapy.squeues.LifoMemoryQueue', + SCHEDULER_PRIORITY_QUEUE=priority_queue_cls, + JOBDIR=jobdir, + DUPEFILTER_CLASS='scrapy.dupefilters.BaseDupeFilter') + super(MockCrawler, self).__init__(Spider, settings) + + +class SchedulerHandler: + priority_queue_cls = None + jobdir = None + + def create_scheduler(self): + self.mock_crawler = MockCrawler(self.priority_queue_cls, self.jobdir) + self.scheduler = Scheduler.from_crawler(self.mock_crawler) + self.spider = Spider(name='spider') + self.scheduler.open(self.spider) + + def close_scheduler(self): + self.scheduler.close('finished') + self.mock_crawler.stop() + + def setUp(self): + self.create_scheduler() + + def tearDown(self): + self.close_scheduler() + + +_PRIORITIES = [("http://foo.com/a", -2), + ("http://foo.com/d", 1), + ("http://foo.com/b", -1), + ("http://foo.com/c", 0), + ("http://foo.com/e", 2)] + + +_URLS = {"http://foo.com/a", "http://foo.com/b", "http://foo.com/c"} + + +class BaseSchedulerInMemoryTester(SchedulerHandler): + def test_length(self): + self.assertFalse(self.scheduler.has_pending_requests()) + self.assertEqual(len(self.scheduler), 0) + + for url in _URLS: + self.scheduler.enqueue_request(Request(url)) + + self.assertTrue(self.scheduler.has_pending_requests()) + self.assertEqual(len(self.scheduler), len(_URLS)) + + def test_dequeue(self): + for url in _URLS: + self.scheduler.enqueue_request(Request(url)) + + urls = set() + while self.scheduler.has_pending_requests(): + urls.add(self.scheduler.next_request().url) + + self.assertEqual(urls, _URLS) + + def test_dequeue_priorities(self): + for url, priority in _PRIORITIES: + self.scheduler.enqueue_request(Request(url, priority=priority)) + + priorities = list() + while self.scheduler.has_pending_requests(): + priorities.append(self.scheduler.next_request().priority) + + self.assertEqual(priorities, sorted([x[1] for x in _PRIORITIES], key=lambda x: -x)) + + +class BaseSchedulerOnDiskTester(SchedulerHandler): + + def setUp(self): + self.jobdir = tempfile.mkdtemp() + self.create_scheduler() + + def tearDown(self): + self.close_scheduler() + + shutil.rmtree(self.jobdir) + self.jobdir = None + + def test_length(self): + self.assertFalse(self.scheduler.has_pending_requests()) + self.assertEqual(len(self.scheduler), 0) + + for url in _URLS: + self.scheduler.enqueue_request(Request(url)) + + self.close_scheduler() + self.create_scheduler() + + self.assertTrue(self.scheduler.has_pending_requests()) + self.assertEqual(len(self.scheduler), len(_URLS)) + + def test_dequeue(self): + for url in _URLS: + self.scheduler.enqueue_request(Request(url)) + + self.close_scheduler() + self.create_scheduler() + + urls = set() + while self.scheduler.has_pending_requests(): + urls.add(self.scheduler.next_request().url) + + self.assertEqual(urls, _URLS) + + def test_dequeue_priorities(self): + for url, priority in _PRIORITIES: + self.scheduler.enqueue_request(Request(url, priority=priority)) + + self.close_scheduler() + self.create_scheduler() + + priorities = list() + while self.scheduler.has_pending_requests(): + priorities.append(self.scheduler.next_request().priority) + + self.assertEqual(priorities, sorted([x[1] for x in _PRIORITIES], key=lambda x: -x)) + + +class TestSchedulerInMemory(BaseSchedulerInMemoryTester, unittest.TestCase): + priority_queue_cls = 'queuelib.PriorityQueue' + + +class TestSchedulerOnDisk(BaseSchedulerOnDiskTester, unittest.TestCase): + priority_queue_cls = 'queuelib.PriorityQueue' + + +_SLOTS = [("http://foo.com/a", 'a'), + ("http://foo.com/b", 'a'), + ("http://foo.com/c", 'b'), + ("http://foo.com/d", 'b'), + ("http://foo.com/e", 'c'), + ("http://foo.com/f", 'c')] + + +class TestSchedulerWithRoundRobinInMemory(BaseSchedulerInMemoryTester, unittest.TestCase): + priority_queue_cls = 'scrapy.pqueues.RoundRobinPriorityQueue' + + def test_round_robin(self): + for url, slot in _SLOTS: + request = Request(url) + _scheduler_slot_write(request, slot) + self.scheduler.enqueue_request(request) + + slots = list() + while self.scheduler.has_pending_requests(): + slots.append(_scheduler_slot_read(self.scheduler.next_request())) + + for i in range(0, len(_SLOTS), 2): + self.assertNotEqual(slots[i], slots[i+1]) + + def test_is_meta_set(self): + url = "http://foo.com/a" + request = Request(url) + if _scheduler_slot_read(request): + _scheduler_slot_write(request, None) + self.scheduler.enqueue_request(request) + self.assertIsNotNone(_scheduler_slot_read(request, None), None) + + +class TestSchedulerWithRoundRobinOnDisk(BaseSchedulerOnDiskTester, unittest.TestCase): + priority_queue_cls = 'scrapy.pqueues.RoundRobinPriorityQueue' + + def test_round_robin(self): + for url, slot in _SLOTS: + request = Request(url) + _scheduler_slot_write(request, slot) + self.scheduler.enqueue_request(request) + + self.close_scheduler() + self.create_scheduler() + + slots = list() + while self.scheduler.has_pending_requests(): + slots.append(_scheduler_slot_read(self.scheduler.next_request())) + + for i in range(0, len(_SLOTS), 2): + self.assertNotEqual(slots[i], slots[i+1]) + + def test_is_meta_set(self): + url = "http://foo.com/a" + request = Request(url) + if _scheduler_slot_read(request): + _scheduler_slot_write(request, None) + self.scheduler.enqueue_request(request) + + self.close_scheduler() + self.create_scheduler() + + self.assertIsNotNone(_scheduler_slot_read(request, None), None) + + +@contextlib.contextmanager +def mkdtemp(): + dir = tempfile.mkdtemp() + try: + yield dir + finally: + shutil.rmtree(dir) + + +def _migration(): + + with mkdtemp() as tmp_dir: + prev_scheduler_handler = SchedulerHandler() + prev_scheduler_handler.priority_queue_cls = 'queuelib.PriorityQueue' + prev_scheduler_handler.jobdir = tmp_dir + + prev_scheduler_handler.create_scheduler() + for url in _URLS: + prev_scheduler_handler.scheduler.enqueue_request(Request(url)) + prev_scheduler_handler.close_scheduler() + + next_scheduler_handler = SchedulerHandler() + next_scheduler_handler.priority_queue_cls = 'scrapy.pqueues.RoundRobinPriorityQueue' + next_scheduler_handler.jobdir = tmp_dir + + next_scheduler_handler.create_scheduler() + + +class TestMigration(unittest.TestCase): + def test_migration(self): + self.assertRaises(ValueError, _migration) + + +class TestSchedulerWithDownloaderAwareInMemory(BaseSchedulerInMemoryTester, unittest.TestCase): + priority_queue_cls = 'scrapy.pqueues.DownloaderAwarePriorityQueue' + + def test_logic(self): + for url, slot in _SLOTS: + request = Request(url) + _scheduler_slot_write(request, slot) + self.scheduler.enqueue_request(request) + + slots = list() + requests = list() + while self.scheduler.has_pending_requests(): + request = self.scheduler.next_request() + slots.append(_scheduler_slot_read(request)) + self.mock_crawler.signals.send_catch_log( + signal=request_reached_downloader, + request=request, + spider=self.spider + ) + requests.append(request) + self.assertEqual(len(slots), len(_SLOTS)) + + for request in requests: + self.mock_crawler.signals.send_catch_log(signal=response_downloaded, + request=request, + response=None, + spider=self.spider) + + unique_slots = len(set(s for _, s in _SLOTS)) + for i in range(0, len(_SLOTS), unique_slots): + part = slots[i:i + unique_slots] + self.assertEqual(len(part), len(set(part))) + + +class TestSchedulerWithDownloaderAwareOnDisk(BaseSchedulerOnDiskTester, unittest.TestCase): + priority_queue_cls = 'scrapy.pqueues.DownloaderAwarePriorityQueue' + def test_logic(self): + for url, slot in _SLOTS: + request = Request(url) + _scheduler_slot_write(request, slot) + self.scheduler.enqueue_request(request) + + self.close_scheduler() + self.create_scheduler() + + slots = list() + requests = list() + while self.scheduler.has_pending_requests(): + request = self.scheduler.next_request() + slots.append(_scheduler_slot_read(request)) + self.mock_crawler.signals.send_catch_log( + signal=request_reached_downloader, + request=request, + spider=self.spider + ) + requests.append(request) + + self.assertEqual(self.scheduler.mqs._slots, {}) + self.assertEqual(len(slots), len(_SLOTS)) + + for request in requests: + self.mock_crawler.signals.send_catch_log(signal=response_downloaded, + request=request, + response=None, + spider=self.spider) + + unique_slots = len(set(s for _, s in _SLOTS)) + for i in range(0, len(_SLOTS), unique_slots): + part = slots[i:i + unique_slots] + self.assertEqual(len(part), len(set(part))) From afdb69ea6daac8bd4f580d6c20bf9e93b741957b Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Adri=C3=A1n=20Chaves?= Date: Mon, 3 Dec 2018 16:36:05 +0100 Subject: [PATCH 288/889] Add a troubleshooting section to the installation instructions Its initial content covers the workaround for #2473. --- docs/intro/install.rst | 31 ++++++++++++++++++++++++++++++- 1 file changed, 30 insertions(+), 1 deletion(-) diff --git a/docs/intro/install.rst b/docs/intro/install.rst index 4a9aa3cfb..daec7fcb7 100644 --- a/docs/intro/install.rst +++ b/docs/intro/install.rst @@ -30,7 +30,8 @@ dependencies depending on your operating system, so be sure to check the We strongly recommend that you install Scrapy in :ref:`a dedicated virtualenv `, to avoid conflicting with your system packages. -For more detailed and platform specifics instructions, read on. +For more detailed and platform specifics instructions, as well as +troubleshooting information, read on. Things that are good to know @@ -247,6 +248,34 @@ that setuptools was unable to pick up one PyPy-specific dependency. To fix this issue, run ``pip install 'PyPyDispatcher>=2.1.0'``. +.. _intro-install-troubleshooting: + +Troubleshooting +=============== + +AttributeError: 'module' object has no attribute 'OP_NO_TLSv1_1' +---------------------------------------------------------------- + +After you install or upgrade Scrapy, Twisted or pyOpenSSL, you may get an +exception with the following traceback:: + + […] + File "[…]/site-packages/twisted/protocols/tls.py", line 63, in + from twisted.internet._sslverify import _setAcceptableProtocols + File "[…]/site-packages/twisted/internet/_sslverify.py", line 38, in + TLSVersion.TLSv1_1: SSL.OP_NO_TLSv1_1, + AttributeError: 'module' object has no attribute 'OP_NO_TLSv1_1' + +The reason you get this exception is that your system or virtual environment +has a version of pyOpenSSL that your version of Twisted does not support. + +To install a version of pyOpenSSL that your version of Twisted supports, +reinstall Twisted with the :code:`tls` extra option:: + + pip install twisted[tls] + +For details, see `Issue #2473 `_. + .. _Python: https://www.python.org/ .. _pip: https://pip.pypa.io/en/latest/installing/ .. _lxml: http://lxml.de/ From 9c314800e4b195df41e5c0aba0d9ffe4bcffec8e Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Adri=C3=A1n=20Chaves?= Date: Mon, 3 Dec 2018 17:14:10 +0100 Subject: [PATCH 289/889] Document the SCRAPY_PROJECT environment variable Fixes #1109 --- docs/topics/commands.rst | 29 ++++++++++++++++++++++++++++- 1 file changed, 28 insertions(+), 1 deletion(-) diff --git a/docs/topics/commands.rst b/docs/topics/commands.rst index ef9c45196..97f8311de 100644 --- a/docs/topics/commands.rst +++ b/docs/topics/commands.rst @@ -37,7 +37,7 @@ Scrapy also understands, and can be configured through, a number of environment variables. Currently these are: * ``SCRAPY_SETTINGS_MODULE`` (see :ref:`topics-settings-module-envvar`) -* ``SCRAPY_PROJECT`` +* ``SCRAPY_PROJECT`` (see :ref:`topics-project-envvar`) * ``SCRAPY_PYTHON_SHELL`` (see :ref:`topics-shell`) .. _topics-project-structure: @@ -71,6 +71,33 @@ the project settings. Here is an example:: [settings] default = myproject.settings +.. _topics-project-envvar: + +Sharing the root directory between projects +=========================================== + +A project root directory, the one that contains the ``scrapy.cfg``, may be +shared by multiple Scrapy projects, each with its own settings module. + +In that case, you must define one or more aliases for those settings modules +under ``[settings]`` in your ``scrapy.cfg`` file:: + + [settings] + default = myproject1.settings + project1 = myproject1.settings + project2 = myproject2.settings + +By default, the ``scrapy`` command-line tool will use the ``default`` settings. +Use the ``SCRAPY_PROJECT`` environment variable to specify a different project +for ``scrapy`` to use:: + + $ scrapy settings --get BOT_NAME + Project 1 Bot + $ export SCRAPY_PROJECT=project2 + $ scrapy settings --get BOT_NAME + Project 2 Bot + + Using the ``scrapy`` tool ========================= From f56079f6c71a77c1f70510cf291cd808617933cd Mon Sep 17 00:00:00 2001 From: Vostretsov Nikita Date: Wed, 5 Dec 2018 10:02:42 +0000 Subject: [PATCH 290/889] Test cleanups PEP8 fixes no need to close implicitly do not use pytest need to put it into class remove round-robin queue additional check for empty queue use pytest tmpdir fixture --- scrapy/pqueues.py | 50 ++++------------ tests/test_scheduler.py | 128 ++++++++++++---------------------------- 2 files changed, 50 insertions(+), 128 deletions(-) diff --git a/scrapy/pqueues.py b/scrapy/pqueues.py index 75073b7a4..287a8de35 100644 --- a/scrapy/pqueues.py +++ b/scrapy/pqueues.py @@ -1,4 +1,3 @@ -from collections import deque import hashlib import logging from six import text_type @@ -71,16 +70,17 @@ class PrioritySlot: self.slot = slot def __hash__(self): - return hash((self.priority, self.slot)) + return hash((self.priority, self.slot)) def __eq__(self, other): - return (self.priority, self.slot) == (other.priority, other.slot) + return (self.priority, self.slot) == (other.priority, other.slot) def __lt__(self, other): - return (self.priority, self.slot) < (other.priority, other.slot) + return (self.priority, self.slot) < (other.priority, other.slot) def __str__(self): - return '_'.join([text_type(self.priority), _pathable(text_type(self.slot))]) + return '_'.join([text_type(self.priority), + _pathable(text_type(self.slot))]) class PriorityAsTupleQueue(PriorityQueue): @@ -135,9 +135,10 @@ class SlotBasedPriorityQueue(object): slot = _scheduler_slot(request) is_new = False if slot not in self.pqueues: - is_new = True self.pqueues[slot] = PriorityAsTupleQueue(self.qfactory) - self.pqueues[slot].push(request, PrioritySlot(priority=priority, slot=slot)) + queue = self.pqueues[slot] + is_new = queue.is_empty() + queue.push(request, PrioritySlot(priority=priority, slot=slot)) return slot, is_new def close(self): @@ -152,36 +153,6 @@ class SlotBasedPriorityQueue(object): return sum(len(x) for x in self.pqueues.values()) if self.pqueues else 0 -class RoundRobinPriorityQueue(SlotBasedPriorityQueue): - - def __init__(self, qfactory, startprios={}): - super(RoundRobinPriorityQueue, self).__init__(qfactory, startprios) - self._slots = deque() - for slot in self.pqueues: - self._slots.append(slot) - - def push(self, request, priority): - slot, is_new = self.push_slot(request, priority) - if is_new: - self._slots.append(slot) - - def pop(self): - if not self._slots: - return - - slot = self._slots.popleft() - request, is_empty = self.pop_slot(slot) - - if not is_empty: - self._slots.append(slot) - - return request - - def close(self): - self._slots.clear() - return super(RoundRobinPriorityQueue, self).close() - - class DownloaderAwarePriorityQueue(SlotBasedPriorityQueue): _DOWNLOADER_AWARE_PQ_ID = 'DOWNLOADER_AWARE_PQ_ID' @@ -191,7 +162,8 @@ class DownloaderAwarePriorityQueue(SlotBasedPriorityQueue): return cls(crawler, qfactory, startprios) def __init__(self, crawler, qfactory, startprios={}): - super(DownloaderAwarePriorityQueue, self).__init__(qfactory, startprios) + super(DownloaderAwarePriorityQueue, self).__init__(qfactory, + startprios) self._slots = {slot: 0 for slot in self.pqueues} crawler.signals.connect(self.on_response_download, signal=response_downloaded) @@ -208,7 +180,7 @@ class DownloaderAwarePriorityQueue(SlotBasedPriorityQueue): return request.meta.get(self._DOWNLOADER_AWARE_PQ_ID, None) == id(self) def pop(self): - slots = [(d, s) for s,d in self._slots.items() if s in self.pqueues] + slots = [(d, s) for s, d in self._slots.items() if s in self.pqueues] if not slots: return diff --git a/tests/test_scheduler.py b/tests/test_scheduler.py index fd86e8d8c..e1cf5842d 100644 --- a/tests/test_scheduler.py +++ b/tests/test_scheduler.py @@ -1,4 +1,3 @@ -import contextlib import shutil import tempfile import unittest @@ -10,15 +9,18 @@ from scrapy.pqueues import _scheduler_slot_read, _scheduler_slot_write from scrapy.signals import request_reached_downloader, response_downloaded from scrapy.spiders import Spider + class MockCrawler(Crawler): def __init__(self, priority_queue_cls, jobdir): - settings = dict(LOG_UNSERIALIZABLE_REQUESTS=False, - SCHEDULER_DISK_QUEUE='scrapy.squeues.PickleLifoDiskQueue', - SCHEDULER_MEMORY_QUEUE='scrapy.squeues.LifoMemoryQueue', - SCHEDULER_PRIORITY_QUEUE=priority_queue_cls, - JOBDIR=jobdir, - DUPEFILTER_CLASS='scrapy.dupefilters.BaseDupeFilter') + settings = dict( + LOG_UNSERIALIZABLE_REQUESTS=False, + SCHEDULER_DISK_QUEUE='scrapy.squeues.PickleLifoDiskQueue', + SCHEDULER_MEMORY_QUEUE='scrapy.squeues.LifoMemoryQueue', + SCHEDULER_PRIORITY_QUEUE=priority_queue_cls, + JOBDIR=jobdir, + DUPEFILTER_CLASS='scrapy.dupefilters.BaseDupeFilter' + ) super(MockCrawler, self).__init__(Spider, settings) @@ -82,7 +84,8 @@ class BaseSchedulerInMemoryTester(SchedulerHandler): while self.scheduler.has_pending_requests(): priorities.append(self.scheduler.next_request().priority) - self.assertEqual(priorities, sorted([x[1] for x in _PRIORITIES], key=lambda x: -x)) + self.assertEqual(priorities, + sorted([x[1] for x in _PRIORITIES], key=lambda x: -x)) class BaseSchedulerOnDiskTester(SchedulerHandler): @@ -134,7 +137,8 @@ class BaseSchedulerOnDiskTester(SchedulerHandler): while self.scheduler.has_pending_requests(): priorities.append(self.scheduler.next_request().priority) - self.assertEqual(priorities, sorted([x[1] for x in _PRIORITIES], key=lambda x: -x)) + self.assertEqual(priorities, + sorted([x[1] for x in _PRIORITIES], key=lambda x: -x)) class TestSchedulerInMemory(BaseSchedulerInMemoryTester, unittest.TestCase): @@ -153,75 +157,15 @@ _SLOTS = [("http://foo.com/a", 'a'), ("http://foo.com/f", 'c')] -class TestSchedulerWithRoundRobinInMemory(BaseSchedulerInMemoryTester, unittest.TestCase): - priority_queue_cls = 'scrapy.pqueues.RoundRobinPriorityQueue' +class TestMigration(unittest.TestCase): - def test_round_robin(self): - for url, slot in _SLOTS: - request = Request(url) - _scheduler_slot_write(request, slot) - self.scheduler.enqueue_request(request) + def setUp(self): + self.tmpdir = tempfile.mkdtemp() - slots = list() - while self.scheduler.has_pending_requests(): - slots.append(_scheduler_slot_read(self.scheduler.next_request())) + def tearDown(self): + shutil.rmtree(self.tmpdir) - for i in range(0, len(_SLOTS), 2): - self.assertNotEqual(slots[i], slots[i+1]) - - def test_is_meta_set(self): - url = "http://foo.com/a" - request = Request(url) - if _scheduler_slot_read(request): - _scheduler_slot_write(request, None) - self.scheduler.enqueue_request(request) - self.assertIsNotNone(_scheduler_slot_read(request, None), None) - - -class TestSchedulerWithRoundRobinOnDisk(BaseSchedulerOnDiskTester, unittest.TestCase): - priority_queue_cls = 'scrapy.pqueues.RoundRobinPriorityQueue' - - def test_round_robin(self): - for url, slot in _SLOTS: - request = Request(url) - _scheduler_slot_write(request, slot) - self.scheduler.enqueue_request(request) - - self.close_scheduler() - self.create_scheduler() - - slots = list() - while self.scheduler.has_pending_requests(): - slots.append(_scheduler_slot_read(self.scheduler.next_request())) - - for i in range(0, len(_SLOTS), 2): - self.assertNotEqual(slots[i], slots[i+1]) - - def test_is_meta_set(self): - url = "http://foo.com/a" - request = Request(url) - if _scheduler_slot_read(request): - _scheduler_slot_write(request, None) - self.scheduler.enqueue_request(request) - - self.close_scheduler() - self.create_scheduler() - - self.assertIsNotNone(_scheduler_slot_read(request, None), None) - - -@contextlib.contextmanager -def mkdtemp(): - dir = tempfile.mkdtemp() - try: - yield dir - finally: - shutil.rmtree(dir) - - -def _migration(): - - with mkdtemp() as tmp_dir: + def _migration(self, tmp_dir): prev_scheduler_handler = SchedulerHandler() prev_scheduler_handler.priority_queue_cls = 'queuelib.PriorityQueue' prev_scheduler_handler.jobdir = tmp_dir @@ -232,18 +176,18 @@ def _migration(): prev_scheduler_handler.close_scheduler() next_scheduler_handler = SchedulerHandler() - next_scheduler_handler.priority_queue_cls = 'scrapy.pqueues.RoundRobinPriorityQueue' + next_scheduler_handler.priority_queue_cls = 'scrapy.pqueues.DownloaderAwarePriorityQueue' next_scheduler_handler.jobdir = tmp_dir next_scheduler_handler.create_scheduler() - -class TestMigration(unittest.TestCase): def test_migration(self): - self.assertRaises(ValueError, _migration) + with self.assertRaises(ValueError): + self._migration(self.tmpdir) -class TestSchedulerWithDownloaderAwareInMemory(BaseSchedulerInMemoryTester, unittest.TestCase): +class TestSchedulerWithDownloaderAwareInMemory(BaseSchedulerInMemoryTester, + unittest.TestCase): priority_queue_cls = 'scrapy.pqueues.DownloaderAwarePriorityQueue' def test_logic(self): @@ -266,10 +210,12 @@ class TestSchedulerWithDownloaderAwareInMemory(BaseSchedulerInMemoryTester, unit self.assertEqual(len(slots), len(_SLOTS)) for request in requests: - self.mock_crawler.signals.send_catch_log(signal=response_downloaded, - request=request, - response=None, - spider=self.spider) + self.mock_crawler.signals.send_catch_log( + signal=response_downloaded, + request=request, + response=None, + spider=self.spider + ) unique_slots = len(set(s for _, s in _SLOTS)) for i in range(0, len(_SLOTS), unique_slots): @@ -277,8 +223,10 @@ class TestSchedulerWithDownloaderAwareInMemory(BaseSchedulerInMemoryTester, unit self.assertEqual(len(part), len(set(part))) -class TestSchedulerWithDownloaderAwareOnDisk(BaseSchedulerOnDiskTester, unittest.TestCase): +class TestSchedulerWithDownloaderAwareOnDisk(BaseSchedulerOnDiskTester, + unittest.TestCase): priority_queue_cls = 'scrapy.pqueues.DownloaderAwarePriorityQueue' + def test_logic(self): for url, slot in _SLOTS: request = Request(url) @@ -304,10 +252,12 @@ class TestSchedulerWithDownloaderAwareOnDisk(BaseSchedulerOnDiskTester, unittest self.assertEqual(len(slots), len(_SLOTS)) for request in requests: - self.mock_crawler.signals.send_catch_log(signal=response_downloaded, - request=request, - response=None, - spider=self.spider) + self.mock_crawler.signals.send_catch_log( + signal=response_downloaded, + request=request, + response=None, + spider=self.spider + ) unique_slots = len(set(s for _, s in _SLOTS)) for i in range(0, len(_SLOTS), unique_slots): From 7efba101946af93397ec3c2323b920644e20ce04 Mon Sep 17 00:00:00 2001 From: Lucy Wang Date: Mon, 10 Dec 2018 14:44:15 +0800 Subject: [PATCH 291/889] remove "sudo: false" now that travis no longer supports it https://changelog.travis-ci.com/deprecation-container-based-linux-build-environment-82037 --- .travis.yml | 1 - 1 file changed, 1 deletion(-) diff --git a/.travis.yml b/.travis.yml index 4218d13bf..08b0bf119 100644 --- a/.travis.yml +++ b/.travis.yml @@ -1,5 +1,4 @@ language: python -sudo: false branches: only: - master From 0e06b9a81672ec432d2fccc3cbacc823ea47b656 Mon Sep 17 00:00:00 2001 From: Vostretsov Nikita Date: Fri, 14 Dec 2018 14:35:18 +0000 Subject: [PATCH 292/889] use urlparse_cached where it is possible --- scrapy/pqueues.py | 24 ++++++++++++++++++++---- 1 file changed, 20 insertions(+), 4 deletions(-) diff --git a/scrapy/pqueues.py b/scrapy/pqueues.py index 287a8de35..ff7ec8c8a 100644 --- a/scrapy/pqueues.py +++ b/scrapy/pqueues.py @@ -8,6 +8,7 @@ from queuelib import PriorityQueue from scrapy.core.downloader import Downloader from scrapy.http import Request from scrapy.signals import request_reached_downloader, response_downloaded +from scrapy.utils.httpobj import urlparse_cached logger = logging.getLogger(__name__) @@ -41,11 +42,26 @@ def _scheduler_slot_write(request, slot): def _scheduler_slot(request): - slot = _scheduler_slot_read(request, None) - if slot is None: - url = _get_from_request(request, 'url') + if isinstance(request, dict): + meta = request.get('meta', dict()) + elif isinstance(request, Request): + meta = request.meta + else: + raise ValueError('Bad type of request "%s"' % (request.__class__, )) + + slot = meta.get(SCHEDULER_SLOT_META_KEY, None) + + if slot is not None: + return slot + + if isinstance(request, dict): + url = request.get('url', None) slot = urlparse(url).hostname or '' - _scheduler_slot_write(request, slot) + elif isinstance(request, Request): + url = request.url + slot = urlparse_cached(request).hostname or '' + + meta[SCHEDULER_SLOT_META_KEY] = slot return slot From 484927b08caff66ea622f8553468c831154df30a Mon Sep 17 00:00:00 2001 From: Vostretsov Nikita Date: Fri, 14 Dec 2018 14:38:28 +0000 Subject: [PATCH 293/889] less complex implementation --- scrapy/pqueues.py | 9 ++------- 1 file changed, 2 insertions(+), 7 deletions(-) diff --git a/scrapy/pqueues.py b/scrapy/pqueues.py index ff7ec8c8a..538678345 100644 --- a/scrapy/pqueues.py +++ b/scrapy/pqueues.py @@ -28,16 +28,11 @@ def _get_from_request(request, key, default=None): def _scheduler_slot_read(request, default=None): - meta = _get_from_request(request, 'meta', dict()) - slot = meta.get(SCHEDULER_SLOT_META_KEY, default) - return slot + return request.meta.get(SCHEDULER_SLOT_META_KEY, default) def _scheduler_slot_write(request, slot): - meta = _get_from_request(request, 'meta', None) - if not isinstance(meta, dict): - raise ValueError('No meta attribute in %s' % (request, )) - meta[SCHEDULER_SLOT_META_KEY] = slot + request.meta[SCHEDULER_SLOT_META_KEY] = slot def _scheduler_slot(request): From 6af964cc0b47c570e035a3486b9f8aebd349bd84 Mon Sep 17 00:00:00 2001 From: Vostretsov Nikita Date: Fri, 14 Dec 2018 14:54:24 +0000 Subject: [PATCH 294/889] common indentation for comment --- scrapy/pqueues.py | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/scrapy/pqueues.py b/scrapy/pqueues.py index 538678345..31e90ff12 100644 --- a/scrapy/pqueues.py +++ b/scrapy/pqueues.py @@ -96,9 +96,9 @@ class PrioritySlot: class PriorityAsTupleQueue(PriorityQueue): """ - Python structures is not directly (de)serialized (to)from json. - We need this modified queue to transform custom structure (from)to - json serializable structures + Python structures is not directly (de)serialized (to)from json. + We need this modified queue to transform custom structure (from)to + json serializable structures """ def __init__(self, qfactory, startprios=()): From a46613afa8acd136f4ba62df2ced2f3c87679512 Mon Sep 17 00:00:00 2001 From: Vostretsov Nikita Date: Fri, 14 Dec 2018 14:55:06 +0000 Subject: [PATCH 295/889] use regular comments --- scrapy/pqueues.py | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/scrapy/pqueues.py b/scrapy/pqueues.py index 31e90ff12..75fc198d0 100644 --- a/scrapy/pqueues.py +++ b/scrapy/pqueues.py @@ -64,10 +64,8 @@ def _scheduler_slot(request): def _pathable(x): pathable_slot = "".join([c if c.isalnum() or c in '-._' else '_' for c in x]) - """ - as we replace some letters we can get collision for different slots - add we add unique part - """ + # as we replace some letters we can get collision for different slots + # add we add unique part unique_slot = hashlib.md5(x.encode('utf8')).hexdigest() return '-'.join([pathable_slot, unique_slot]) From a23e1894b3a09e1daf49dd9592546b2d21bc9a72 Mon Sep 17 00:00:00 2001 From: Vostretsov Nikita Date: Fri, 14 Dec 2018 16:18:34 +0000 Subject: [PATCH 296/889] Fix boto problem another way to fix boto problem Revert "fix for travis ci based on https://github.com/boto/boto/issues/3717" This reverts commit 150d2564ff0ea994652da7f5be333d72e0b38d93. fix for travis ci based on https://github.com/boto/boto/issues/3717 --- tests/requirements-py2.txt | 1 + 1 file changed, 1 insertion(+) diff --git a/tests/requirements-py2.txt b/tests/requirements-py2.txt index 790f29d34..f5bcfda60 100644 --- a/tests/requirements-py2.txt +++ b/tests/requirements-py2.txt @@ -11,3 +11,4 @@ testfixtures # optional for shell wrapper tests bpython ipython<6.0 +google-compute-engine From d970be64cc47c382bd615cd547e7e94c17e27b48 Mon Sep 17 00:00:00 2001 From: Vostretsov Nikita Date: Mon, 17 Dec 2018 13:52:11 +0000 Subject: [PATCH 297/889] Integration test integration testing only everything is working, not logic of PQ use method create slot attribute in constructor corect class for test case stop crawler in teardown method use class correct entity naming python 2 adaptation integration test with crawler and spider --- tests/test_scheduler.py | 46 +++++++++++++++++++++++++++++++++++++---- 1 file changed, 42 insertions(+), 4 deletions(-) diff --git a/tests/test_scheduler.py b/tests/test_scheduler.py index e1cf5842d..9bdc82b30 100644 --- a/tests/test_scheduler.py +++ b/tests/test_scheduler.py @@ -2,12 +2,17 @@ import shutil import tempfile import unittest +from twisted.internet import defer +from twisted.trial.unittest import TestCase + from scrapy.crawler import Crawler from scrapy.core.scheduler import Scheduler from scrapy.http import Request from scrapy.pqueues import _scheduler_slot_read, _scheduler_slot_write from scrapy.signals import request_reached_downloader, response_downloaded from scrapy.spiders import Spider +from scrapy.utils.test import get_crawler +from tests.mockserver import MockServer class MockCrawler(Crawler): @@ -223,6 +228,13 @@ class TestSchedulerWithDownloaderAwareInMemory(BaseSchedulerInMemoryTester, self.assertEqual(len(part), len(set(part))) +def _is_slots_unique(base_slots, result_slots): + unique_slots = len(set(s for _, s in base_slots)) + for i in range(0, len(result_slots), unique_slots): + part = result_slots[i:i + unique_slots] + assert len(part) == len(set(part)) + + class TestSchedulerWithDownloaderAwareOnDisk(BaseSchedulerOnDiskTester, unittest.TestCase): priority_queue_cls = 'scrapy.pqueues.DownloaderAwarePriorityQueue' @@ -259,7 +271,33 @@ class TestSchedulerWithDownloaderAwareOnDisk(BaseSchedulerOnDiskTester, spider=self.spider ) - unique_slots = len(set(s for _, s in _SLOTS)) - for i in range(0, len(_SLOTS), unique_slots): - part = slots[i:i + unique_slots] - self.assertEqual(len(part), len(set(part))) + _is_slots_unique(_SLOTS, slots) + + +class StartUrlsSpider(Spider): + + def __init__(self, start_urls): + self.start_urls = start_urls + + +class TestIntegrationWithDownloaderAwareOnDisk(TestCase): + def setUp(self): + self.crawler = get_crawler( + StartUrlsSpider, + {'SCHEDULER_PRIORITY_QUEUE': 'scrapy.pqueues.DownloaderAwarePriorityQueue', + 'DUPEFILTER_CLASS': 'scrapy.dupefilters.BaseDupeFilter'} + ) + + @defer.inlineCallbacks + def tearDown(self): + yield self.crawler.stop() + + @defer.inlineCallbacks + def test_integration_downloader_aware_priority_queue(self): + with MockServer() as mockserver: + + url = mockserver.url("/status?n=200", is_secure=False) + slots = [url] * 6 + yield self.crawler.crawl(slots) + self.assertEqual(self.crawler.stats.get_value('downloader/response_count'), + len(slots)) From 7d3175ac8433f964ebbb80ebd67f9899cf059100 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Daniel=20Gra=C3=B1a?= Date: Thu, 20 Dec 2018 19:23:23 -0300 Subject: [PATCH 298/889] Fix boto import error under Jessie testing environment --- .travis.yml | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/.travis.yml b/.travis.yml index 08b0bf119..a201f97b1 100644 --- a/.travis.yml +++ b/.travis.yml @@ -42,6 +42,11 @@ install: virtualenv --python="$PYPY_VERSION/bin/pypy3" "$HOME/virtualenvs/$PYPY_VERSION" source "$HOME/virtualenvs/$PYPY_VERSION/bin/activate" fi + if [ "$TOXENV" = "jessie" ]; then + # Not used directly but allows boto GCE plugins to load. + # https://github.com/GoogleCloudPlatform/compute-image-packages/issues/262 + pip install google-compute-engine + fi - pip install -U tox twine wheel codecov script: tox From 6ff2574c277ba1eda31fb43f86f43d5b7b4bef09 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Daniel=20Gra=C3=B1a?= Date: Thu, 20 Dec 2018 19:39:29 -0300 Subject: [PATCH 299/889] Needs to be installed within tox env --- .travis.yml | 5 ----- tox.ini | 3 +++ 2 files changed, 3 insertions(+), 5 deletions(-) diff --git a/.travis.yml b/.travis.yml index a201f97b1..08b0bf119 100644 --- a/.travis.yml +++ b/.travis.yml @@ -42,11 +42,6 @@ install: virtualenv --python="$PYPY_VERSION/bin/pypy3" "$HOME/virtualenvs/$PYPY_VERSION" source "$HOME/virtualenvs/$PYPY_VERSION/bin/activate" fi - if [ "$TOXENV" = "jessie" ]; then - # Not used directly but allows boto GCE plugins to load. - # https://github.com/GoogleCloudPlatform/compute-image-packages/issues/262 - pip install google-compute-engine - fi - pip install -U tox twine wheel codecov script: tox diff --git a/tox.ini b/tox.ini index e5543fe2a..0c0f8f7b7 100644 --- a/tox.ini +++ b/tox.ini @@ -51,6 +51,9 @@ deps = cssselect==0.9.1 zope.interface==4.1.1 -rtests/requirements-py2.txt +# Not used directly but allows boto GCE plugins to load. +# https://github.com/GoogleCloudPlatform/compute-image-packages/issues/262 + google-compute-engine==2.8.12 [testenv:trunk] basepython = python2.7 From 4163a7a1c7ac11c8d4db70f371c26181b90d8dfd Mon Sep 17 00:00:00 2001 From: Vostretsov Nikita Date: Fri, 21 Dec 2018 09:10:32 +0000 Subject: [PATCH 300/889] no need for this --- tests/requirements-py2.txt | 1 - 1 file changed, 1 deletion(-) diff --git a/tests/requirements-py2.txt b/tests/requirements-py2.txt index f5bcfda60..790f29d34 100644 --- a/tests/requirements-py2.txt +++ b/tests/requirements-py2.txt @@ -11,4 +11,3 @@ testfixtures # optional for shell wrapper tests bpython ipython<6.0 -google-compute-engine From 987c2ae4a964e45120c245235c9b0c49dc36b71f Mon Sep 17 00:00:00 2001 From: Vostretsov Nikita Date: Tue, 25 Dec 2018 09:13:09 +0000 Subject: [PATCH 301/889] test ip concurrency incompatibility with DAPQ --- tests/test_scheduler.py | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/tests/test_scheduler.py b/tests/test_scheduler.py index 9bdc82b30..17b706bd7 100644 --- a/tests/test_scheduler.py +++ b/tests/test_scheduler.py @@ -301,3 +301,20 @@ class TestIntegrationWithDownloaderAwareOnDisk(TestCase): yield self.crawler.crawl(slots) self.assertEqual(self.crawler.stats.get_value('downloader/response_count'), len(slots)) + + +class TestIncompatibility(unittest.TestCase): + + def _incompatible(self): + settings = dict( + SCHEDULER_PRIORITY_QUEUE='scrapy.pqueues.DownloaderAwarePriorityQueue', + CONCURRENT_REQUESTS_PER_IP=1 + ) + crawler = Crawler(Spider, settings) + scheduler = Scheduler.from_crawler(crawler) + spider = Spider(name='spider') + scheduler.open(spider) + + def test_incompatibility(self): + with self.assertRaises(ValueError): + self._incompatible() From 8e8ce301b1a56e40f7e9c322a7b73b8dcfcefc43 Mon Sep 17 00:00:00 2001 From: Vostretsov Nikita Date: Tue, 25 Dec 2018 09:14:09 +0000 Subject: [PATCH 302/889] check CONCURRENT_REQUESTS_PER_IP is not set --- scrapy/pqueues.py | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/scrapy/pqueues.py b/scrapy/pqueues.py index 75fc198d0..d9effc9d1 100644 --- a/scrapy/pqueues.py +++ b/scrapy/pqueues.py @@ -171,6 +171,14 @@ class DownloaderAwarePriorityQueue(SlotBasedPriorityQueue): return cls(crawler, qfactory, startprios) def __init__(self, crawler, qfactory, startprios={}): + ip_concurrency_key = 'CONCURRENT_REQUESTS_PER_IP' + ip_concurrency = crawler.settings.getint(ip_concurrency_key, 0) + + if ip_concurrency > 0: + raise ValueError('"%s" does not support %s=%d' % (self.__class__, + ip_concurrency_key, + ip_concurrency)) + super(DownloaderAwarePriorityQueue, self).__init__(qfactory, startprios) self._slots = {slot: 0 for slot in self.pqueues} From 338b78d796de6c93af0f4bcb762f82f5a14b87cd Mon Sep 17 00:00:00 2001 From: Vostretsov Nikita Date: Tue, 25 Dec 2018 09:44:20 +0000 Subject: [PATCH 303/889] Add documentation add section to broad-crawl topic reword in accord with broad-crawl topic add documentation for new priority queue --- docs/topics/broad-crawls.rst | 11 +++++++++++ docs/topics/settings.rst | 7 ++++++- 2 files changed, 17 insertions(+), 1 deletion(-) diff --git a/docs/topics/broad-crawls.rst b/docs/topics/broad-crawls.rst index eb02086dc..37f7a8748 100644 --- a/docs/topics/broad-crawls.rst +++ b/docs/topics/broad-crawls.rst @@ -39,6 +39,17 @@ you need to keep in mind when using Scrapy for doing broad crawls, along with concrete suggestions of Scrapy settings to tune in order to achieve an efficient broad crawl. +Use proper :setting:`SCHEDULER_PRIORITY_QUEUE` +============================================== + +Default scrapy's scheduler priority queue is ``'queuelib.PriorityQueue'``. +It works best during single domain crawl. And it does not work well with crawling +many different domains in parallel + +To apply recommended priority queue use:: + + SCHEDULER_PRIORITY_QUEUE = 'scrapy.pqueues.DownloaderAwarePriorityQueue' + Increase concurrency ==================== diff --git a/docs/topics/settings.rst b/docs/topics/settings.rst index 47b6cf13d..7b9ff7e39 100644 --- a/docs/topics/settings.rst +++ b/docs/topics/settings.rst @@ -1144,7 +1144,12 @@ SCHEDULER_PRIORITY_QUEUE ------------------------ Default: ``'queuelib.PriorityQueue'`` -Type of priority queue used by scheduler. +Type of priority queue used by scheduler. Another available type is +``scrapy.pqueues.DownloaderAwarePriorityQueue``. +``scrapy.pqueues.DownloaderAwarePriorityQueue`` is works better than +``'queuelib.PriorityQueue'`` when you crawl many different domains in parallel. +But ``scrapy.pqueues.DownloaderAwarePriorityQueue`` +does not work together with :setting:`CONCURRENT_REQUESTS_PER_IP`. .. setting:: SPIDER_CONTRACTS From 7c148fce5acc100f5f01719db374578bfca2512a Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Adri=C3=A1n=20Chaves?= Date: Fri, 8 Mar 2019 15:40:16 +0100 Subject: [PATCH 304/889] Implement Item.deepcopy() --- docs/topics/items.rst | 44 +++++++++++++++++++++++++++++++++---------- scrapy/item.py | 8 ++++++++ tests/test_item.py | 8 ++++++++ 3 files changed, 50 insertions(+), 10 deletions(-) diff --git a/docs/topics/items.rst b/docs/topics/items.rst index ae44aecd3..d744fd9ea 100644 --- a/docs/topics/items.rst +++ b/docs/topics/items.rst @@ -40,6 +40,7 @@ objects. Here is an example:: name = scrapy.Field() price = scrapy.Field() stock = scrapy.Field() + tags = scrapy.Field() last_updated = scrapy.Field(serializer=str) .. note:: Those familiar with `Django`_ will notice that Scrapy Items are @@ -155,19 +156,42 @@ To access all populated values, just use the typical `dict API`_:: >>> product.items() [('price', 1000), ('name', 'Desktop PC')] + +Copying items +------------- + +To copy an item, you must first decide whether you want a shallow copy or a +deep copy. + +If your item contains mutable_ values like lists or dictionaries, a shallow +copy will keep references to the same mutable values across all different +copies. + +.. _mutable: https://docs.python.org/glossary.html#term-mutable + +For example, if you have an item with a list of tags, and you create a shallow +copy of that item, both the original item and the copy have the same list of +tags. Adding a tag to the list of one of the items will add the tag to the +other item as well. + +If that is not the desired behavior, use a deep copy instead. + +See the `documentation of the copy module`_ for more information. + +.. _documentation of the copy module: https://docs.python.org/library/copy.html + +To create a shallow copy of an item, you can either call +:meth:`~scrapy.item.Item.copy` on an existing item +(``product2 = product.copy()``) or instantiate your item class from an existing +item (``product2 = Product(product)``). + +To create a deep copy, call :meth:`~scrapy.item.Item.deepcopy` instead +(``product2 = product.deepcopy()``). + + Other common tasks ------------------ -Copying items:: - - >>> product2 = Product(product) - >>> print(product2) - Product(name='Desktop PC', price=1000) - - >>> product3 = product2.copy() - >>> print(product3) - Product(name='Desktop PC', price=1000) - Creating dicts from items:: >>> dict(product) # create a dict from all populated values diff --git a/scrapy/item.py b/scrapy/item.py index aa05e9c69..031b80a2d 100644 --- a/scrapy/item.py +++ b/scrapy/item.py @@ -6,6 +6,7 @@ See documentation in docs/topics/item.rst from pprint import pformat from collections import MutableMapping +from copy import deepcopy from abc import ABCMeta import six @@ -96,6 +97,13 @@ class DictItem(MutableMapping, BaseItem): def copy(self): return self.__class__(self) + def deepcopy(self): + """Return a `deep copy`_ of this item. + + .. _deep copy: https://docs.python.org/library/copy.html#copy.deepcopy + """ + return deepcopy(self) + @six.add_metaclass(ItemMeta) class Item(DictItem): diff --git a/tests/test_item.py b/tests/test_item.py index 2c1eb0dd3..010d3b141 100644 --- a/tests/test_item.py +++ b/tests/test_item.py @@ -249,6 +249,14 @@ class ItemTest(unittest.TestCase): copied_item['name'] = copied_item['name'].upper() self.assertNotEqual(item['name'], copied_item['name']) + def test_deepcopy(self): + class TestItem(Item): + tags = Field() + item = TestItem({'tags': ['tag1']}) + copied_item = item.deepcopy() + item['tags'].append('tag2') + assert item['tags'] != copied_item['tags'] + class ItemMetaTest(unittest.TestCase): From 9a0fe8bf2dc108b1f2c50aaef211b39981e65c25 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Marc=20Hern=C3=A1ndez=20Cabot?= Date: Wed, 20 Mar 2019 16:13:31 +0100 Subject: [PATCH 305/889] remove duplicated entry in gitignore --- .gitignore | 1 - 1 file changed, 1 deletion(-) diff --git a/.gitignore b/.gitignore index 7392ed31e..ff6e2ea65 100644 --- a/.gitignore +++ b/.gitignore @@ -15,7 +15,6 @@ htmlcov/ .pytest_cache/ .coverage.* .cache/ -.pytest_cache/ # Windows Thumbs.db From bbf24b7a1ce2e91eab57d1b8524d398822a1ddd1 Mon Sep 17 00:00:00 2001 From: Eugenio Lacuesta Date: Fri, 22 Mar 2019 18:02:31 -0300 Subject: [PATCH 306/889] Rule.process_request: use scrapy.utils.python.get_func_args --- scrapy/spiders/crawl.py | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) diff --git a/scrapy/spiders/crawl.py b/scrapy/spiders/crawl.py index c01f75798..f474b0a18 100644 --- a/scrapy/spiders/crawl.py +++ b/scrapy/spiders/crawl.py @@ -10,6 +10,7 @@ import six from scrapy.http import Request, HtmlResponse from scrapy.utils.spider import iterate_spider_output +from scrapy.utils.python import get_func_args from scrapy.spiders import Spider @@ -35,10 +36,8 @@ class Rule(object): Wrapper around the request processing function to maintain backward compatibility with functions that do not take a Response object as parameter. """ - argcount = self.process_request.__code__.co_argcount - if hasattr(self.process_request, '__self__'): - argcount = argcount - 1 - args = [request] if argcount == 1 else [request, response] + arg_count = len(get_func_args(self.process_request)) + args = [request] if arg_count == 1 else [request, response] return self.process_request(*args) From 56929e77d98391255b77ffd3350abb49da18009e Mon Sep 17 00:00:00 2001 From: Eugenio Lacuesta Date: Fri, 22 Mar 2019 18:34:55 -0300 Subject: [PATCH 307/889] Rule.process_request: deprecate the use of functions taking only one argument --- scrapy/spiders/crawl.py | 25 +++++++++++++++---------- 1 file changed, 15 insertions(+), 10 deletions(-) diff --git a/scrapy/spiders/crawl.py b/scrapy/spiders/crawl.py index f474b0a18..f469891d0 100644 --- a/scrapy/spiders/crawl.py +++ b/scrapy/spiders/crawl.py @@ -6,16 +6,19 @@ See documentation in docs/topics/spiders.rst """ import copy +import warnings + import six +from scrapy.exceptions import ScrapyDeprecationWarning from scrapy.http import Request, HtmlResponse from scrapy.utils.spider import iterate_spider_output from scrapy.utils.python import get_func_args from scrapy.spiders import Spider -def identity(x): - return x +def _identity(request, response): + return request class Rule(object): @@ -25,19 +28,21 @@ class Rule(object): self.callback = callback self.cb_kwargs = cb_kwargs or {} self.process_links = process_links - self.process_request = process_request or identity - if follow is None: - self.follow = False if callback else True - else: - self.follow = follow + self.process_request = process_request or _identity + self.follow = follow if follow is not None else not callback def _process_request(self, request, response): """ - Wrapper around the request processing function to maintain backward compatibility - with functions that do not take a Response object as parameter. + Wrapper around the request processing function to maintain backward + compatibility with functions that do not take a Response object """ arg_count = len(get_func_args(self.process_request)) - args = [request] if arg_count == 1 else [request, response] + if arg_count == 1: + args = [request] + msg = 'Rule.process_request should accept two arguments (request, response), accepting only one is deprecated' + warnings.warn(msg, category=ScrapyDeprecationWarning, stacklevel=2) + else: + args = [request, response] return self.process_request(*args) From 174ba3cc5671cdc9e66cb29275986ff7481affc5 Mon Sep 17 00:00:00 2001 From: Eugenio Lacuesta Date: Fri, 22 Mar 2019 19:16:18 -0300 Subject: [PATCH 308/889] Rule.process_request: update docs --- docs/topics/spiders.rst | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/docs/topics/spiders.rst b/docs/topics/spiders.rst index 24b6f7ec9..30e15906e 100644 --- a/docs/topics/spiders.rst +++ b/docs/topics/spiders.rst @@ -403,11 +403,11 @@ Crawling rules This is mainly used for filtering purposes. ``process_request`` is a callable (or a string, in which case a method from - the spider object with that name will be used) which will be called for - every request extracted by this rule. This callable should take a Request object - as first positional argument and, optionally, the Response object from which the - Request originated as second positional argument. It must return a request or None - (to filter out the request). + the spider object with that name will be used) which will be called for every + :class:`~scrapy.http.Request` extracted by this rule. This callable should + take said request as first argument and the :class:`~scrapy.http.Response` + from which the request originated as second argument. It must return a + ``Request`` object or ``None`` (to filter out the request). CrawlSpider example ~~~~~~~~~~~~~~~~~~~ From 1b4385b7e3f78694c0378455644b539d80d293a2 Mon Sep 17 00:00:00 2001 From: Eugenio Lacuesta Date: Fri, 22 Mar 2019 19:46:17 -0300 Subject: [PATCH 309/889] Rule.process_request: move deprecation warnings and compiling code, update tests --- scrapy/spiders/crawl.py | 35 +++++++++++++++++++---------------- tests/test_spider.py | 38 ++++++++++++++++++++++---------------- 2 files changed, 41 insertions(+), 32 deletions(-) diff --git a/scrapy/spiders/crawl.py b/scrapy/spiders/crawl.py index f469891d0..6db3a1e06 100644 --- a/scrapy/spiders/crawl.py +++ b/scrapy/spiders/crawl.py @@ -21,6 +21,13 @@ def _identity(request, response): return request +def _get_method(method, spider): + if callable(method): + return method + elif isinstance(method, six.string_types): + return getattr(spider, method, None) + + class Rule(object): def __init__(self, link_extractor, callback=None, cb_kwargs=None, follow=None, process_links=None, process_request=None): @@ -29,20 +36,24 @@ class Rule(object): self.cb_kwargs = cb_kwargs or {} self.process_links = process_links self.process_request = process_request or _identity + self.process_request_argcount = None self.follow = follow if follow is not None else not callback + def _compile(self, spider): + self.callback = _get_method(self.callback, spider) + self.process_links = _get_method(self.process_links, spider) + self.process_request = _get_method(self.process_request, spider) + self.process_request_argcount = len(get_func_args(self.process_request)) + if self.process_request_argcount == 1: + msg = 'Rule.process_request should accept two arguments (request, response), accepting only one is deprecated' + warnings.warn(msg, category=ScrapyDeprecationWarning, stacklevel=2) + def _process_request(self, request, response): """ Wrapper around the request processing function to maintain backward compatibility with functions that do not take a Response object """ - arg_count = len(get_func_args(self.process_request)) - if arg_count == 1: - args = [request] - msg = 'Rule.process_request should accept two arguments (request, response), accepting only one is deprecated' - warnings.warn(msg, category=ScrapyDeprecationWarning, stacklevel=2) - else: - args = [request, response] + args = [request] if self.process_request_argcount == 1 else [request, response] return self.process_request(*args) @@ -98,17 +109,9 @@ class CrawlSpider(Spider): yield request_or_item def _compile_rules(self): - def get_method(method): - if callable(method): - return method - elif isinstance(method, six.string_types): - return getattr(self, method, None) - self._rules = [copy.copy(r) for r in self.rules] for rule in self._rules: - rule.callback = get_method(rule.callback) - rule.process_links = get_method(rule.process_links) - rule.process_request = get_method(rule.process_request) + rule._compile(self) @classmethod def from_crawler(cls, crawler, *args, **kwargs): diff --git a/tests/test_spider.py b/tests/test_spider.py index c9af7a2d7..83fb68c2f 100644 --- a/tests/test_spider.py +++ b/tests/test_spider.py @@ -275,14 +275,17 @@ class CrawlSpiderTest(SpiderTest): Rule(LinkExtractor(), process_request=process_request_change_domain), ) - spider = _CrawlSpider() - output = list(spider._requests_to_follow(response)) - self.assertEqual(len(output), 3) - self.assertTrue(all(map(lambda r: isinstance(r, Request), output))) - self.assertEqual([r.url for r in output], - ['http://example.com/somepage/item/12.html', - 'http://example.com/about.html', - 'http://example.com/nofollow.html']) + with warnings.catch_warnings(record=True) as cw: + spider = _CrawlSpider() + output = list(spider._requests_to_follow(response)) + self.assertEqual(len(output), 3) + self.assertTrue(all(map(lambda r: isinstance(r, Request), output))) + self.assertEqual([r.url for r in output], + ['http://example.com/somepage/item/12.html', + 'http://example.com/about.html', + 'http://example.com/nofollow.html']) + self.assertEqual(len(cw), 1) + self.assertEqual(cw[0].category, ScrapyDeprecationWarning) def test_process_request_with_response(self): @@ -324,14 +327,17 @@ class CrawlSpiderTest(SpiderTest): def process_request_upper(self, request): return request.replace(url=request.url.upper()) - spider = _CrawlSpider() - output = list(spider._requests_to_follow(response)) - self.assertEqual(len(output), 3) - self.assertTrue(all(map(lambda r: isinstance(r, Request), output))) - self.assertEqual([r.url for r in output], - ['http://EXAMPLE.ORG/SOMEPAGE/ITEM/12.HTML', - 'http://EXAMPLE.ORG/ABOUT.HTML', - 'http://EXAMPLE.ORG/NOFOLLOW.HTML']) + with warnings.catch_warnings(record=True) as cw: + spider = _CrawlSpider() + output = list(spider._requests_to_follow(response)) + self.assertEqual(len(output), 3) + self.assertTrue(all(map(lambda r: isinstance(r, Request), output))) + self.assertEqual([r.url for r in output], + ['http://EXAMPLE.ORG/SOMEPAGE/ITEM/12.HTML', + 'http://EXAMPLE.ORG/ABOUT.HTML', + 'http://EXAMPLE.ORG/NOFOLLOW.HTML']) + self.assertEqual(len(cw), 1) + self.assertEqual(cw[0].category, ScrapyDeprecationWarning) def test_process_request_instance_method_with_response(self): From 90934959d07db881aec5933fd7b77bcd2dccfa4f Mon Sep 17 00:00:00 2001 From: Mikhail Korobov Date: Thu, 27 Dec 2018 17:12:24 +0500 Subject: [PATCH 310/889] actually apply __slots__ suggestion [wip] refactoring * SlotPriorityQueues doesn't care about objects inside, it is now just a container for multiple priority queues * assorted variable renames * don't inherit DownloaderAwarePriorityQueue from SlotBasedPriorityQueue * apply @whalebot-helmsman's suggestions for __slots__ and meta issues more bike-shedding * remove mutable default arguments * more verbose variable names remove unneeded code * PriorityAsTupleQueue.is_empty does the same as len(self) == 0 * custom PriorityAsTupleQueue.close is not needed after a switch to namedtuples * is_new and is_empty return values are unused * "url" local variable is unused PrioritySlot.__str__ shouldn't return unicode in Python 2 also, do some bike-shedding: _pathable -> _path_safe use namedtuple for PrioritySlot cleanup: _get_from_request does the same here Request.meta is always a dict --- scrapy/pqueues.py | 180 ++++++++++++++++++---------------------- tests/test_scheduler.py | 2 +- 2 files changed, 82 insertions(+), 100 deletions(-) diff --git a/scrapy/pqueues.py b/scrapy/pqueues.py index d9effc9d1..3ef896b99 100644 --- a/scrapy/pqueues.py +++ b/scrapy/pqueues.py @@ -1,6 +1,6 @@ import hashlib import logging -from six import text_type +from collections import namedtuple from six.moves.urllib.parse import urlparse from queuelib import PriorityQueue @@ -17,12 +17,12 @@ logger = logging.getLogger(__name__) SCHEDULER_SLOT_META_KEY = Downloader.DOWNLOAD_SLOT -def _get_from_request(request, key, default=None): +def _get_request_meta(request): if isinstance(request, dict): - return request.get(key, default) + return request.setdefault('meta', {}) if isinstance(request, Request): - return getattr(request, key, default) + return request.meta raise ValueError('Bad type of request "%s"' % (request.__class__, )) @@ -35,15 +35,8 @@ def _scheduler_slot_write(request, slot): request.meta[SCHEDULER_SLOT_META_KEY] = slot -def _scheduler_slot(request): - - if isinstance(request, dict): - meta = request.get('meta', dict()) - elif isinstance(request, Request): - meta = request.meta - else: - raise ValueError('Bad type of request "%s"' % (request.__class__, )) - +def _set_scheduler_slot(request): + meta = _get_request_meta(request) slot = meta.get(SCHEDULER_SLOT_META_KEY, None) if slot is not None: @@ -53,43 +46,29 @@ def _scheduler_slot(request): url = request.get('url', None) slot = urlparse(url).hostname or '' elif isinstance(request, Request): - url = request.url slot = urlparse_cached(request).hostname or '' meta[SCHEDULER_SLOT_META_KEY] = slot - return slot -def _pathable(x): - pathable_slot = "".join([c if c.isalnum() or c in '-._' else '_' for c in x]) - +def _path_safe(text): + """ Return a filesystem-safe version of a string ``text`` """ + pathable_slot = "".join([c if c.isalnum() or c in '-._' else '_' + for c in text]) # as we replace some letters we can get collision for different slots # add we add unique part - unique_slot = hashlib.md5(x.encode('utf8')).hexdigest() - + unique_slot = hashlib.md5(text.encode('utf8')).hexdigest() return '-'.join([pathable_slot, unique_slot]) -class PrioritySlot: - __slots__ = ('priority', 'slot') - - def __init__(self, priority=0, slot=None): - self.priority = priority - self.slot = slot - - def __hash__(self): - return hash((self.priority, self.slot)) - - def __eq__(self, other): - return (self.priority, self.slot) == (other.priority, other.slot) - - def __lt__(self, other): - return (self.priority, self.slot) < (other.priority, other.slot) +class PrioritySlot(namedtuple("PrioritySlot", ["priority", "slot"])): + """ ``(priority, slot)`` tuple which uses a path-safe slot name + when converting to str """ + __slots__ = () def __str__(self): - return '_'.join([text_type(self.priority), - _pathable(text_type(self.slot))]) + return '%s_%s' % (self.priority, _path_safe(str(self.slot))) class PriorityAsTupleQueue(PriorityQueue): @@ -99,78 +78,65 @@ class PriorityAsTupleQueue(PriorityQueue): json serializable structures """ def __init__(self, qfactory, startprios=()): - + startprios = [PrioritySlot(priority=p[0], slot=p[1]) + for p in startprios] super(PriorityAsTupleQueue, self).__init__( - qfactory, - [PrioritySlot(priority=p[0], slot=p[1]) for p in startprios] - ) - - def close(self): - startprios = super(PriorityAsTupleQueue, self).close() - return [(s.priority, s.slot) for s in startprios] - - def is_empty(self): - return not self.queues or len(self) == 0 + qfactory=qfactory, + startprios=startprios) -class SlotBasedPriorityQueue(object): +class SlotPriorityQueues(object): + """ Container for multiple priority queues. """ + def __init__(self, pqfactory, slot_startprios=None): + """ + ``pqfactory`` is a factory for creating new PriorityQueues. + It must be a function which accepts a single optional ``startprios`` + argument, with a list of priorities to create queues for. - def __init__(self, qfactory, startprios={}): - self.pqueues = dict() # slot -> priority queue - self.qfactory = qfactory # factory for creating new internal queues - - if not startprios: - return - - if not isinstance(startprios, dict): - raise ValueError("Looks like your priorities file malforfemed. " - "Possible reason: You run scrapy with previous " - "version. Interrupted it. Updated scrapy. And " - "run again.") - - for slot, prios in startprios.items(): - self.pqueues[slot] = PriorityAsTupleQueue(self.qfactory, prios) + ``slot_startprios`` is a ``{slot: startprios}`` dict. + """ + self.pqfactory = pqfactory + self.pqueues = {} # slot -> priority queue + for slot, startprios in (slot_startprios or {}).items(): + self.pqueues[slot] = self.pqfactory(startprios) def pop_slot(self, slot): + """ Pop an object from a priority queue for this slot """ queue = self.pqueues[slot] request = queue.pop() - is_empty = queue.is_empty() - if is_empty: + if len(queue) == 0: del self.pqueues[slot] + return request - return request, is_empty - - def push_slot(self, request, priority): - slot = _scheduler_slot(request) - is_new = False + def push_slot(self, slot, obj, priority): + """ Push an object to a priority queue for this slot """ if slot not in self.pqueues: - self.pqueues[slot] = PriorityAsTupleQueue(self.qfactory) + self.pqueues[slot] = self.pqfactory() queue = self.pqueues[slot] - is_new = queue.is_empty() - queue.push(request, PrioritySlot(priority=priority, slot=slot)) - return slot, is_new + queue.push(obj, priority) def close(self): - startprios = dict() - for slot, queue in self.pqueues.items(): - prios = queue.close() - startprios[slot] = prios + active = {slot: queue.close() + for slot, queue in self.pqueues.items()} self.pqueues.clear() - return startprios + return active def __len__(self): return sum(len(x) for x in self.pqueues.values()) if self.pqueues else 0 + def __contains__(self, slot): + return slot in self.pqueues -class DownloaderAwarePriorityQueue(SlotBasedPriorityQueue): + +class DownloaderAwarePriorityQueue(object): _DOWNLOADER_AWARE_PQ_ID = 'DOWNLOADER_AWARE_PQ_ID' @classmethod - def from_crawler(cls, crawler, qfactory, startprios={}): + def from_crawler(cls, crawler, qfactory, startprios=None): return cls(crawler, qfactory, startprios) - def __init__(self, crawler, qfactory, startprios={}): + def __init__(self, crawler, qfactory, startprios=None): ip_concurrency_key = 'CONCURRENT_REQUESTS_PER_IP' ip_concurrency = crawler.settings.getint(ip_concurrency_key, 0) @@ -179,16 +145,25 @@ class DownloaderAwarePriorityQueue(SlotBasedPriorityQueue): ip_concurrency_key, ip_concurrency)) - super(DownloaderAwarePriorityQueue, self).__init__(qfactory, - startprios) - self._slots = {slot: 0 for slot in self.pqueues} + def pqfactory(startprios=()): + return PriorityAsTupleQueue(qfactory, startprios) + + if startprios and not isinstance(startprios, dict): + raise ValueError("DownloaderAwarePriorityQueue accepts " + "``startprios`` as a dict; %r instance is passed." + " Only a crawl started with the same priority " + "queue class can be resumed." % startprios.__class__) + self._slot_pqueues = SlotPriorityQueues(pqfactory, + slot_startprios=startprios) + + self._active_downloads = {slot: 0 for slot in self._slot_pqueues.pqueues} crawler.signals.connect(self.on_response_download, signal=response_downloaded) crawler.signals.connect(self.on_request_reached_downloader, signal=request_reached_downloader) def mark(self, request): - meta = _get_from_request(request, 'meta', None) + meta = _get_request_meta(request) if not isinstance(meta, dict): raise ValueError('No meta attribute in %s' % (request, )) meta[self._DOWNLOADER_AWARE_PQ_ID] = id(self) @@ -197,39 +172,46 @@ class DownloaderAwarePriorityQueue(SlotBasedPriorityQueue): return request.meta.get(self._DOWNLOADER_AWARE_PQ_ID, None) == id(self) def pop(self): - slots = [(d, s) for s, d in self._slots.items() if s in self.pqueues] + slots = [(active_downloads, slot) + for slot, active_downloads in self._active_downloads.items() + if slot in self._slot_pqueues] if not slots: return slot = min(slots)[1] - request, _ = self.pop_slot(slot) + request = self._slot_pqueues.pop_slot(slot) self.mark(request) return request def push(self, request, priority): - slot, _ = self.push_slot(request, priority) - if slot not in self._slots: - self._slots[slot] = 0 + slot = _set_scheduler_slot(request) + priority_slot = PrioritySlot(priority=priority, slot=slot) + self._slot_pqueues.push_slot(slot, request, priority_slot) + if slot not in self._active_downloads: + self._active_downloads[slot] = 0 def on_response_download(self, response, request, spider): if not self.check_mark(request): return slot = _scheduler_slot_read(request) - if slot not in self._slots or self._slots[slot] <= 0: + if slot not in self._active_downloads or self._active_downloads[slot] <= 0: raise ValueError('Get response for wrong slot "%s"' % (slot, )) - self._slots[slot] = self._slots[slot] - 1 - if self._slots[slot] == 0 and slot not in self.pqueues: - del self._slots[slot] + self._active_downloads[slot] = self._active_downloads[slot] - 1 + if self._active_downloads[slot] == 0 and slot not in self._slot_pqueues: + del self._active_downloads[slot] def on_request_reached_downloader(self, request, spider): if not self.check_mark(request): return slot = _scheduler_slot_read(request) - self._slots[slot] = self._slots.get(slot, 0) + 1 + self._active_downloads[slot] = self._active_downloads.get(slot, 0) + 1 def close(self): - self._slots.clear() - return super(DownloaderAwarePriorityQueue, self).close() + self._active_downloads.clear() + return self._slot_pqueues.close() + + def __len__(self): + return len(self._slot_pqueues) diff --git a/tests/test_scheduler.py b/tests/test_scheduler.py index 17b706bd7..5dd35f45c 100644 --- a/tests/test_scheduler.py +++ b/tests/test_scheduler.py @@ -260,7 +260,7 @@ class TestSchedulerWithDownloaderAwareOnDisk(BaseSchedulerOnDiskTester, ) requests.append(request) - self.assertEqual(self.scheduler.mqs._slots, {}) + self.assertEqual(self.scheduler.mqs._active_downloads, {}) self.assertEqual(len(slots), len(_SLOTS)) for request in requests: From 757f53a32461ef0c3d2fe4caf64197f67271b5f3 Mon Sep 17 00:00:00 2001 From: Vostretsov Nikita Date: Wed, 9 Jan 2019 10:00:13 +0000 Subject: [PATCH 311/889] Address Lucy's comments add tests to check correctness of slot setermination unmark requests after downloading shorter better exception message --- scrapy/pqueues.py | 15 ++++++++++++--- tests/test_scheduler.py | 4 ++-- 2 files changed, 14 insertions(+), 5 deletions(-) diff --git a/scrapy/pqueues.py b/scrapy/pqueues.py index 3ef896b99..d8eed010f 100644 --- a/scrapy/pqueues.py +++ b/scrapy/pqueues.py @@ -36,6 +36,12 @@ def _scheduler_slot_write(request, slot): def _set_scheduler_slot(request): + """ + >>> _set_scheduler_slot({'url':'http://foo.com'}) == _set_scheduler_slot({'url':'http://bar.com'}) + False + >>> _set_scheduler_slot({'url':'http://foo.com'}) == _set_scheduler_slot({'url':'http://foo.com'}) + True + """ meta = _get_request_meta(request) slot = meta.get(SCHEDULER_SLOT_META_KEY, None) @@ -141,9 +147,8 @@ class DownloaderAwarePriorityQueue(object): ip_concurrency = crawler.settings.getint(ip_concurrency_key, 0) if ip_concurrency > 0: - raise ValueError('"%s" does not support %s=%d' % (self.__class__, - ip_concurrency_key, - ip_concurrency)) + raise ValueError('"%s" does not support setting %s' % (self.__class__, + ip_concurrency_key)) def pqfactory(startprios=()): return PriorityAsTupleQueue(qfactory, startprios) @@ -171,6 +176,9 @@ class DownloaderAwarePriorityQueue(object): def check_mark(self, request): return request.meta.get(self._DOWNLOADER_AWARE_PQ_ID, None) == id(self) + def unmark(self, request): + del request.meta[self._DOWNLOADER_AWARE_PQ_ID] + def pop(self): slots = [(active_downloads, slot) for slot, active_downloads in self._active_downloads.items() @@ -194,6 +202,7 @@ class DownloaderAwarePriorityQueue(object): def on_response_download(self, response, request, spider): if not self.check_mark(request): return + self.unmark(request) slot = _scheduler_slot_read(request) if slot not in self._active_downloads or self._active_downloads[slot] <= 0: diff --git a/tests/test_scheduler.py b/tests/test_scheduler.py index 5dd35f45c..3fb70a110 100644 --- a/tests/test_scheduler.py +++ b/tests/test_scheduler.py @@ -248,8 +248,8 @@ class TestSchedulerWithDownloaderAwareOnDisk(BaseSchedulerOnDiskTester, self.close_scheduler() self.create_scheduler() - slots = list() - requests = list() + slots = [] + requests = [] while self.scheduler.has_pending_requests(): request = self.scheduler.next_request() slots.append(_scheduler_slot_read(request)) From 3b1db71dac8716878ff1b94ee0d1095e5c80795f Mon Sep 17 00:00:00 2001 From: Vostretsov Nikita Date: Wed, 9 Jan 2019 12:14:40 +0000 Subject: [PATCH 312/889] New signal update signature documentation for new signal utilize new signal correct signal handler signature emit new signal test another signal new signal rename test file faster test rename test case tests for signal emitting in bad cases --- docs/topics/signals.rst | 17 +++++++++ scrapy/core/downloader/__init__.py | 3 ++ scrapy/pqueues.py | 6 +-- scrapy/signals.py | 1 + tests/test_request_left.py | 59 ++++++++++++++++++++++++++++++ tests/test_scheduler.py | 8 ++-- 6 files changed, 86 insertions(+), 8 deletions(-) create mode 100644 tests/test_request_left.py diff --git a/docs/topics/signals.rst b/docs/topics/signals.rst index ff07b9d55..f13e8270c 100644 --- a/docs/topics/signals.rst +++ b/docs/topics/signals.rst @@ -295,6 +295,23 @@ request_reached_downloader :param spider: the spider that yielded the request :type spider: :class:`~scrapy.spiders.Spider` object +request_left_downloader +--------------------------- + +.. signal:: request_left_downloader +.. function:: request_left_downloader(request, spider) + + Sent when a :class:`~scrapy.http.Request` left downloader even in case of + failure. + + The signal does not support returning deferreds from their handlers. + + :param request: the request that reached downloader + :type request: :class:`~scrapy.http.Request` object + + :param spider: the spider that yielded the request + :type spider: :class:`~scrapy.spiders.Spider` object + response_received ----------------- diff --git a/scrapy/core/downloader/__init__.py b/scrapy/core/downloader/__init__.py index 4695d75f4..d856a2f37 100644 --- a/scrapy/core/downloader/__init__.py +++ b/scrapy/core/downloader/__init__.py @@ -188,6 +188,9 @@ class Downloader(object): def finish_transferring(_): slot.transferring.remove(request) self._process_queue(spider, slot) + self.signals.send_catch_log(signal=signals.request_left_downloader, + request=request, + spider=spider) return _ return dfd.addBoth(finish_transferring) diff --git a/scrapy/pqueues.py b/scrapy/pqueues.py index d8eed010f..6a9feb599 100644 --- a/scrapy/pqueues.py +++ b/scrapy/pqueues.py @@ -7,7 +7,7 @@ from queuelib import PriorityQueue from scrapy.core.downloader import Downloader from scrapy.http import Request -from scrapy.signals import request_reached_downloader, response_downloaded +from scrapy.signals import request_reached_downloader, request_left_downloader from scrapy.utils.httpobj import urlparse_cached @@ -163,7 +163,7 @@ class DownloaderAwarePriorityQueue(object): self._active_downloads = {slot: 0 for slot in self._slot_pqueues.pqueues} crawler.signals.connect(self.on_response_download, - signal=response_downloaded) + signal=request_left_downloader) crawler.signals.connect(self.on_request_reached_downloader, signal=request_reached_downloader) @@ -199,7 +199,7 @@ class DownloaderAwarePriorityQueue(object): if slot not in self._active_downloads: self._active_downloads[slot] = 0 - def on_response_download(self, response, request, spider): + def on_response_download(self, request, spider): if not self.check_mark(request): return self.unmark(request) diff --git a/scrapy/signals.py b/scrapy/signals.py index c0e4bb74e..2ea986b8c 100644 --- a/scrapy/signals.py +++ b/scrapy/signals.py @@ -14,6 +14,7 @@ spider_error = object() request_scheduled = object() request_dropped = object() request_reached_downloader = object() +request_left_downloader = object() response_received = object() response_downloaded = object() item_scraped = object() diff --git a/tests/test_request_left.py b/tests/test_request_left.py new file mode 100644 index 000000000..ddeca0499 --- /dev/null +++ b/tests/test_request_left.py @@ -0,0 +1,59 @@ +from twisted.internet import defer +from twisted.trial.unittest import TestCase +from scrapy.signals import request_left_downloader +from scrapy.spiders import Spider +from scrapy.utils.test import get_crawler +from tests.mockserver import MockServer + +class SignalCatcherSpider(Spider): + name = 'signal_catcher' + + def __init__(self, crawler, url, *args, **kwargs): + super(SignalCatcherSpider, self).__init__(*args, **kwargs) + crawler.signals.connect(self.on_response_download, + signal=request_left_downloader) + self.catched_times = 0 + self.start_urls = [url] + + @classmethod + def from_crawler(cls, crawler, *args, **kwargs): + spider = cls(crawler, *args, **kwargs) + return spider + + def on_response_download(self, request, spider): + self.catched_times = self.catched_times + 1 + + +class TestCatching(TestCase): + + def setUp(self): + self.mockserver = MockServer() + self.mockserver.__enter__() + + def tearDown(self): + self.mockserver.__exit__(None, None, None) + + @defer.inlineCallbacks + def test_success(self): + crawler = get_crawler(SignalCatcherSpider) + yield crawler.crawl(self.mockserver.url("/status?n=200")) + self.assertEqual(crawler.spider.catched_times, 1) + + @defer.inlineCallbacks + def test_timeout(self): + crawler = get_crawler(SignalCatcherSpider, + {'DOWNLOAD_TIMEOUT': 0.1}) + yield crawler.crawl(self.mockserver.url("/delay?n=0.2")) + self.assertEqual(crawler.spider.catched_times, 1) + + @defer.inlineCallbacks + def test_disconnect(self): + crawler = get_crawler(SignalCatcherSpider) + yield crawler.crawl(self.mockserver.url("/drop")) + self.assertEqual(crawler.spider.catched_times, 1) + + @defer.inlineCallbacks + def test_noconnect(self): + crawler = get_crawler(SignalCatcherSpider) + yield crawler.crawl('http://thereisdefinetelynosuchdomain.com') + self.assertEqual(crawler.spider.catched_times, 1) diff --git a/tests/test_scheduler.py b/tests/test_scheduler.py index 3fb70a110..1bcc1e5a8 100644 --- a/tests/test_scheduler.py +++ b/tests/test_scheduler.py @@ -9,7 +9,7 @@ from scrapy.crawler import Crawler from scrapy.core.scheduler import Scheduler from scrapy.http import Request from scrapy.pqueues import _scheduler_slot_read, _scheduler_slot_write -from scrapy.signals import request_reached_downloader, response_downloaded +from scrapy.signals import request_reached_downloader, request_left_downloader from scrapy.spiders import Spider from scrapy.utils.test import get_crawler from tests.mockserver import MockServer @@ -216,9 +216,8 @@ class TestSchedulerWithDownloaderAwareInMemory(BaseSchedulerInMemoryTester, for request in requests: self.mock_crawler.signals.send_catch_log( - signal=response_downloaded, + signal=request_left_downloader, request=request, - response=None, spider=self.spider ) @@ -265,9 +264,8 @@ class TestSchedulerWithDownloaderAwareOnDisk(BaseSchedulerOnDiskTester, for request in requests: self.mock_crawler.signals.send_catch_log( - signal=response_downloaded, + signal=request_left_downloader, request=request, - response=None, spider=self.spider ) From 83eb5376458ce1d444e8ad7911730ee0c58c8544 Mon Sep 17 00:00:00 2001 From: Mikhail Korobov Date: Thu, 17 Jan 2019 07:38:15 +0500 Subject: [PATCH 313/889] assorted cleanups: comments, docstrings, etc scheduler cleanup Scheduler no longer converts requests to dicts; PriorityQueue instances always work with Request instances; converting Requests to dicts is now Priority Queue responsibility. minor cleanup --- docs/topics/settings.rst | 6 +- scrapy/core/scheduler.py | 99 +++++++++++++---- scrapy/pqueues.py | 158 +++++++++++++++------------- scrapy/settings/default_settings.py | 2 +- scrapy/squeues.py | 11 +- 5 files changed, 175 insertions(+), 101 deletions(-) diff --git a/docs/topics/settings.rst b/docs/topics/settings.rst index 7b9ff7e39..6e13e64d6 100644 --- a/docs/topics/settings.rst +++ b/docs/topics/settings.rst @@ -1142,13 +1142,13 @@ Type of in-memory queue used by scheduler. Other available type is: SCHEDULER_PRIORITY_QUEUE ------------------------ -Default: ``'queuelib.PriorityQueue'`` +Default: ``'scrapy.pqueues.ScrapyPriorityQueue'`` Type of priority queue used by scheduler. Another available type is ``scrapy.pqueues.DownloaderAwarePriorityQueue``. ``scrapy.pqueues.DownloaderAwarePriorityQueue`` is works better than -``'queuelib.PriorityQueue'`` when you crawl many different domains in parallel. -But ``scrapy.pqueues.DownloaderAwarePriorityQueue`` +``scrapy.pqueues.ScrapyPriorityQueue`` when you crawl many different +domains in parallel. But ``scrapy.pqueues.DownloaderAwarePriorityQueue`` does not work together with :setting:`CONCURRENT_REQUESTS_PER_IP`. .. setting:: SPIDER_CONTRACTS diff --git a/scrapy/core/scheduler.py b/scrapy/core/scheduler.py index d40f3aa0c..c385fafe1 100644 --- a/scrapy/core/scheduler.py +++ b/scrapy/core/scheduler.py @@ -1,17 +1,44 @@ import os import json import logging +import warnings from os.path import join, exists -from scrapy.utils.reqser import request_to_dict, request_from_dict +from queuelib import PriorityQueue + from scrapy.utils.misc import load_object, create_instance from scrapy.utils.job import job_dir +from scrapy.utils.deprecate import ScrapyDeprecationWarning + logger = logging.getLogger(__name__) class Scheduler(object): + """ + Scrapy Scheduler. It allows to enqueue requests and then get + a next request to download. Scheduler is also handling duplication + filtering, via dupefilter. + Prioritization and queueing is not performed by the Scheduler. + User sets ``priority`` field for each Request, and a PriorityQueue + (defined by :setting:`SCHEDULER_PRIORITY_QUEUE`) uses these priorities + to dequeue requests in a desired order. + + Scheduler uses two PriorityQueue instances, configured to work in-memory + and on-disk (optional). When on-disk queue is present, it is used by + default, and an in-memory queue is used as a fallback for cases where + a disk queue can't handle a request (can't serialize it). + + :setting:`SCHEDULER_MEMORY_QUEUE` and + :setting:`SCHEDULER_DISK_QUEUE` allow to specify lower-level queue classes + which PriorityQueue instances would be instantiated with, to keep requests + on disk and in memory respectively. + + Overall, Scheduler is an object which holds several PriorityQueue instances + (in-memory and on-disk) and implements fallback logic for them. + Also, it handles dupefilters. + """ def __init__(self, dupefilter, jobdir=None, dqclass=None, mqclass=None, logunser=False, stats=None, pqclass=None, crawler=None): self.df = dupefilter @@ -29,9 +56,19 @@ class Scheduler(object): dupefilter_cls = load_object(settings['DUPEFILTER_CLASS']) dupefilter = create_instance(dupefilter_cls, settings, crawler) pqclass = load_object(settings['SCHEDULER_PRIORITY_QUEUE']) + if pqclass is PriorityQueue: + # backwards compatibility + warnings.warn("SCHEDULER_PRIORITY_QUEUE='queuelib.PriorityQueue'" + " is no longer supported because of API changes; " + "please use 'scrapy.pqueues.ScrapyPriorityQueue'", + ScrapyDeprecationWarning) + from scrapy.pqueues import ScrapyPriorityQueue + pqclass = ScrapyPriorityQueue + dqclass = load_object(settings['SCHEDULER_DISK_QUEUE']) mqclass = load_object(settings['SCHEDULER_MEMORY_QUEUE']) - logunser = settings.getbool('LOG_UNSERIALIZABLE_REQUESTS', settings.getbool('SCHEDULER_DEBUG')) + logunser = settings.getbool('LOG_UNSERIALIZABLE_REQUESTS', + settings.getbool('SCHEDULER_DEBUG')) return cls(dupefilter, jobdir=job_dir(settings), logunser=logunser, stats=crawler.stats, pqclass=pqclass, dqclass=dqclass, mqclass=mqclass, crawler=crawler) @@ -41,15 +78,19 @@ class Scheduler(object): def open(self, spider): self.spider = spider - self.mqs = create_instance(self.pqclass, None, self.crawler, self._newmq) + + # in-memory PriorityQueue instance + self.mqs = self._mq() + + # on-disk PriorityQueue instance self.dqs = self._dq() if self.dqdir else None + return self.df.open() def close(self, reason): if self.dqs: - prios = self.dqs.close() - with open(join(self.dqdir, 'active.json'), 'w') as f: - json.dump(prios, f) + state = self.dqs.close() + self._write_dqs_state(self.dqdir, state) return self.df.close(reason) def enqueue_request(self, request): @@ -66,7 +107,7 @@ class Scheduler(object): return True def next_request(self): - request = self.mqs.pop() + request = self._mqpop() if request: self.stats.inc_value('scheduler/dequeued/memory', spider=self.spider) else: @@ -84,8 +125,7 @@ class Scheduler(object): if self.dqs is None: return try: - reqd = request_to_dict(request, self.spider) - self.dqs.push(reqd, -request.priority) + self.dqs.push(request, -request.priority) except ValueError as e: # non serializable request if self.logunser: msg = ("Unable to serialize request: %(request)s - reason:" @@ -105,37 +145,54 @@ class Scheduler(object): def _dqpop(self): if self.dqs: - d = self.dqs.pop() - if d: - return request_from_dict(d, self.spider) + return self.dqs.pop() + + def _mqpop(self): + return self.mqs.pop() def _newmq(self, priority): + """ Factory for creating memory queues. """ return self.mqclass() def _newdq(self, priority): - return self.dqclass(join(self.dqdir, 'p%s' % (priority, ))) + """ Factory for creating disk queues. """ + path = join(self.dqdir, 'p%s' % (priority, )) + return self.dqclass(path) + + def _mq(self): + """ Create a new priority queue instance, with in-memory storage """ + return create_instance(self.pqclass, None, self.crawler, self._newmq, + serialize=False) def _dq(self): - activef = join(self.dqdir, 'active.json') - if exists(activef): - with open(activef) as f: - prios = json.load(f) - else: - prios = () - + """ Create a new priority queue instance, with disk storage """ + state = self._read_dqs_state(self.dqdir) q = create_instance(self.pqclass, None, self.crawler, self._newdq, - startprios=prios) + state, + serialize=True) if q: logger.info("Resuming crawl (%(queuesize)d requests scheduled)", {'queuesize': len(q)}, extra={'spider': self.spider}) return q def _dqdir(self, jobdir): + """ Return a folder name to keep disk queue state at """ if jobdir: dqdir = join(jobdir, 'requests.queue') if not exists(dqdir): os.makedirs(dqdir) return dqdir + + def _read_dqs_state(self, dqdir): + path = join(dqdir, 'active.json') + if not exists(path): + return () + with open(path) as f: + return json.load(f) + + def _write_dqs_state(self, dqdir, state): + with open(join(dqdir, 'active.json'), 'w') as f: + json.dump(state, f) diff --git a/scrapy/pqueues.py b/scrapy/pqueues.py index 6a9feb599..622f6bbc5 100644 --- a/scrapy/pqueues.py +++ b/scrapy/pqueues.py @@ -1,10 +1,10 @@ import hashlib import logging from collections import namedtuple -from six.moves.urllib.parse import urlparse from queuelib import PriorityQueue +from scrapy.utils.reqser import request_to_dict, request_from_dict from scrapy.core.downloader import Downloader from scrapy.http import Request from scrapy.signals import request_reached_downloader, request_left_downloader @@ -17,16 +17,6 @@ logger = logging.getLogger(__name__) SCHEDULER_SLOT_META_KEY = Downloader.DOWNLOAD_SLOT -def _get_request_meta(request): - if isinstance(request, dict): - return request.setdefault('meta', {}) - - if isinstance(request, Request): - return request.meta - - raise ValueError('Bad type of request "%s"' % (request.__class__, )) - - def _scheduler_slot_read(request, default=None): return request.meta.get(SCHEDULER_SLOT_META_KEY, default) @@ -37,24 +27,17 @@ def _scheduler_slot_write(request, slot): def _set_scheduler_slot(request): """ - >>> _set_scheduler_slot({'url':'http://foo.com'}) == _set_scheduler_slot({'url':'http://bar.com'}) - False - >>> _set_scheduler_slot({'url':'http://foo.com'}) == _set_scheduler_slot({'url':'http://foo.com'}) - True + >>> request = Request('http://example.com') + >>> _set_scheduler_slot(request) + 'example.com' + >>> _scheduler_slot_read(request) + 'example.com' """ - meta = _get_request_meta(request) - slot = meta.get(SCHEDULER_SLOT_META_KEY, None) - + slot = _scheduler_slot_read(request, None) if slot is not None: return slot - - if isinstance(request, dict): - url = request.get('url', None) - slot = urlparse(url).hostname or '' - elif isinstance(request, Request): - slot = urlparse_cached(request).hostname or '' - - meta[SCHEDULER_SLOT_META_KEY] = slot + slot = urlparse_cached(request).hostname or '' + _scheduler_slot_write(request, slot) return slot @@ -68,30 +51,25 @@ def _path_safe(text): return '-'.join([pathable_slot, unique_slot]) -class PrioritySlot(namedtuple("PrioritySlot", ["priority", "slot"])): - """ ``(priority, slot)`` tuple which uses a path-safe slot name - when converting to str """ +class _Priority(namedtuple("_Priority", ["priority", "slot"])): + """ Slot-specific priority. It is a hack - ``(priority, slot)`` tuple + which can be used instead of int priorities in queues: + + * they are ordered in the same way - order is still by priority value, + min(prios) works; + * str(p) representation is guaranteed to be different when slots + are different - this is important because str(p) is used to create + queue files on disk; + * they have readable str(p) representation which is safe + to use as a file name. + """ __slots__ = () def __str__(self): return '%s_%s' % (self.priority, _path_safe(str(self.slot))) -class PriorityAsTupleQueue(PriorityQueue): - """ - Python structures is not directly (de)serialized (to)from json. - We need this modified queue to transform custom structure (from)to - json serializable structures - """ - def __init__(self, qfactory, startprios=()): - startprios = [PrioritySlot(priority=p[0], slot=p[1]) - for p in startprios] - super(PriorityAsTupleQueue, self).__init__( - qfactory=qfactory, - startprios=startprios) - - -class SlotPriorityQueues(object): +class _SlotPriorityQueues(object): """ Container for multiple priority queues. """ def __init__(self, pqfactory, slot_startprios=None): """ @@ -134,44 +112,78 @@ class SlotPriorityQueues(object): return slot in self.pqueues -class DownloaderAwarePriorityQueue(object): - - _DOWNLOADER_AWARE_PQ_ID = 'DOWNLOADER_AWARE_PQ_ID' +class ScrapyPriorityQueue(PriorityQueue): + """ + PriorityQueue which works with scrapy.Request instances and + can optionally convert them to/from dicts before/after putting to a queue. + """ + def __init__(self, crawler, qfactory, startprios=(), serialize=False): + super(ScrapyPriorityQueue, self).__init__(qfactory, startprios) + self.serialize = serialize + self.spider = crawler.spider @classmethod - def from_crawler(cls, crawler, qfactory, startprios=None): - return cls(crawler, qfactory, startprios) + def from_crawler(cls, crawler, qfactory, startprios=(), serialize=False): + return cls(crawler, qfactory, startprios, serialize) - def __init__(self, crawler, qfactory, startprios=None): - ip_concurrency_key = 'CONCURRENT_REQUESTS_PER_IP' - ip_concurrency = crawler.settings.getint(ip_concurrency_key, 0) + def push(self, request, priority=0): + if self.serialize: + request = request_to_dict(request, self.spider) + super(ScrapyPriorityQueue, self).push(request, priority) - if ip_concurrency > 0: - raise ValueError('"%s" does not support setting %s' % (self.__class__, - ip_concurrency_key)) + def pop(self): + request = super(ScrapyPriorityQueue, self).pop() + if request and self.serialize: + request = request_from_dict(request, self.spider) + return request + + +class DownloaderAwarePriorityQueue(object): + """ PriorityQueue which takes Downlaoder activity in account: + domains (slots) with the least amount of active downloads are dequeued + first. + """ + _DOWNLOADER_AWARE_PQ_ID = '_DOWNLOADER_AWARE_PQ_ID' + + @classmethod + def from_crawler(cls, crawler, qfactory, slot_startprios=None, serialize=False): + return cls(crawler, qfactory, slot_startprios, serialize) + + def __init__(self, crawler, qfactory, slot_startprios=None, serialize=False): + if crawler.settings.getint('CONCURRENT_REQUESTS_PER_IP') != 0: + raise ValueError('"%s" does not support CONCURRENT_REQUESTS_PER_IP' + % (self.__class__,)) + + if slot_startprios and not isinstance(slot_startprios, dict): + raise ValueError("DownloaderAwarePriorityQueue accepts " + "``slot_startprios`` as a dict; %r instance " + "is passed. Most likely, it means the state is" + "created by an incompatible priority queue. " + "Only a crawl started with the same priority " + "queue class can be resumed." % + slot_startprios.__class__) + + slot_startprios = { + slot: [_Priority(p, slot) for p in startprios] + for slot, startprios in (slot_startprios or {}).items()} def pqfactory(startprios=()): - return PriorityAsTupleQueue(qfactory, startprios) - - if startprios and not isinstance(startprios, dict): - raise ValueError("DownloaderAwarePriorityQueue accepts " - "``startprios`` as a dict; %r instance is passed." - " Only a crawl started with the same priority " - "queue class can be resumed." % startprios.__class__) - self._slot_pqueues = SlotPriorityQueues(pqfactory, - slot_startprios=startprios) + return ScrapyPriorityQueue(crawler, qfactory, startprios, serialize) + self._slot_pqueues = _SlotPriorityQueues(pqfactory, slot_startprios) self._active_downloads = {slot: 0 for slot in self._slot_pqueues.pqueues} crawler.signals.connect(self.on_response_download, signal=request_left_downloader) crawler.signals.connect(self.on_request_reached_downloader, signal=request_reached_downloader) + self.serialize = serialize + # There are two PriorityQueues at the same time (memory and disk-based), + # and they both listen to Downloader signals. To filter out signals + # coming from the other queue, each queue keeps track of its own + # requests using mark / unmark / check_mark methods. def mark(self, request): - meta = _get_request_meta(request) - if not isinstance(meta, dict): - raise ValueError('No meta attribute in %s' % (request, )) - meta[self._DOWNLOADER_AWARE_PQ_ID] = id(self) + request.meta[self._DOWNLOADER_AWARE_PQ_ID] = id(self) def check_mark(self, request): return request.meta.get(self._DOWNLOADER_AWARE_PQ_ID, None) == id(self) @@ -194,7 +206,7 @@ class DownloaderAwarePriorityQueue(object): def push(self, request, priority): slot = _set_scheduler_slot(request) - priority_slot = PrioritySlot(priority=priority, slot=slot) + priority_slot = _Priority(priority=priority, slot=slot) self._slot_pqueues.push_slot(slot, request, priority_slot) if slot not in self._active_downloads: self._active_downloads[slot] = 0 @@ -206,8 +218,8 @@ class DownloaderAwarePriorityQueue(object): slot = _scheduler_slot_read(request) if slot not in self._active_downloads or self._active_downloads[slot] <= 0: - raise ValueError('Get response for wrong slot "%s"' % (slot, )) - self._active_downloads[slot] = self._active_downloads[slot] - 1 + raise ValueError('Got response for a wrong slot "%s"' % (slot, )) + self._active_downloads[slot] -= 1 if self._active_downloads[slot] == 0 and slot not in self._slot_pqueues: del self._active_downloads[slot] @@ -220,7 +232,9 @@ class DownloaderAwarePriorityQueue(object): def close(self): self._active_downloads.clear() - return self._slot_pqueues.close() + active = self._slot_pqueues.close() + return {slot: [p.priority for p in startprios] + for slot, startprios in active.items()} def __len__(self): return len(self._slot_pqueues) diff --git a/scrapy/settings/default_settings.py b/scrapy/settings/default_settings.py index ca004aedd..365b405cb 100644 --- a/scrapy/settings/default_settings.py +++ b/scrapy/settings/default_settings.py @@ -244,7 +244,7 @@ ROBOTSTXT_OBEY = False SCHEDULER = 'scrapy.core.scheduler.Scheduler' SCHEDULER_DISK_QUEUE = 'scrapy.squeues.PickleLifoDiskQueue' SCHEDULER_MEMORY_QUEUE = 'scrapy.squeues.LifoMemoryQueue' -SCHEDULER_PRIORITY_QUEUE = 'queuelib.PriorityQueue' +SCHEDULER_PRIORITY_QUEUE = 'scrapy.pqueues.ScrapyPriorityQueue' SPIDER_LOADER_CLASS = 'scrapy.spiderloader.SpiderLoader' SPIDER_LOADER_WARN_ONLY = False diff --git a/scrapy/squeues.py b/scrapy/squeues.py index d2074a457..30cc926e5 100644 --- a/scrapy/squeues.py +++ b/scrapy/squeues.py @@ -7,6 +7,7 @@ from six.moves import cPickle as pickle from queuelib import queue + def _serializable_queue(queue_class, serialize, deserialize): class SerializableQueue(queue_class): @@ -22,6 +23,7 @@ def _serializable_queue(queue_class, serialize, deserialize): return SerializableQueue + def _pickle_serialize(obj): try: return pickle.dumps(obj, protocol=2) @@ -31,13 +33,14 @@ def _pickle_serialize(obj): except (pickle.PicklingError, AttributeError, TypeError) as e: raise ValueError(str(e)) -PickleFifoDiskQueue = _serializable_queue(queue.FifoDiskQueue, \ + +PickleFifoDiskQueue = _serializable_queue(queue.FifoDiskQueue, _pickle_serialize, pickle.loads) -PickleLifoDiskQueue = _serializable_queue(queue.LifoDiskQueue, \ +PickleLifoDiskQueue = _serializable_queue(queue.LifoDiskQueue, _pickle_serialize, pickle.loads) -MarshalFifoDiskQueue = _serializable_queue(queue.FifoDiskQueue, \ +MarshalFifoDiskQueue = _serializable_queue(queue.FifoDiskQueue, marshal.dumps, marshal.loads) -MarshalLifoDiskQueue = _serializable_queue(queue.LifoDiskQueue, \ +MarshalLifoDiskQueue = _serializable_queue(queue.LifoDiskQueue, marshal.dumps, marshal.loads) FifoMemoryQueue = queue.FifoMemoryQueue LifoMemoryQueue = queue.LifoMemoryQueue From 443fb98a4776f4196662bb48918f1471758b7ae7 Mon Sep 17 00:00:00 2001 From: Vostretsov Nikita Date: Tue, 5 Mar 2019 12:44:07 +0000 Subject: [PATCH 314/889] Use downloader directly rename variable remove old write function remove unused imports remove old read function remove unused function use mock methods mock downloader close downloader add parse method use new PQ class create mock downloader use downloader directly remove mark/unmark mechanism --- scrapy/pqueues.py | 103 ++++++++++------------------------------ tests/test_scheduler.py | 87 +++++++++++++++++++++------------ 2 files changed, 81 insertions(+), 109 deletions(-) diff --git a/scrapy/pqueues.py b/scrapy/pqueues.py index 622f6bbc5..0681e6729 100644 --- a/scrapy/pqueues.py +++ b/scrapy/pqueues.py @@ -5,42 +5,11 @@ from collections import namedtuple from queuelib import PriorityQueue from scrapy.utils.reqser import request_to_dict, request_from_dict -from scrapy.core.downloader import Downloader -from scrapy.http import Request -from scrapy.signals import request_reached_downloader, request_left_downloader -from scrapy.utils.httpobj import urlparse_cached logger = logging.getLogger(__name__) -SCHEDULER_SLOT_META_KEY = Downloader.DOWNLOAD_SLOT - - -def _scheduler_slot_read(request, default=None): - return request.meta.get(SCHEDULER_SLOT_META_KEY, default) - - -def _scheduler_slot_write(request, slot): - request.meta[SCHEDULER_SLOT_META_KEY] = slot - - -def _set_scheduler_slot(request): - """ - >>> request = Request('http://example.com') - >>> _set_scheduler_slot(request) - 'example.com' - >>> _scheduler_slot_read(request) - 'example.com' - """ - slot = _scheduler_slot_read(request, None) - if slot is not None: - return slot - slot = urlparse_cached(request).hostname or '' - _scheduler_slot_write(request, slot) - return slot - - def _path_safe(text): """ Return a filesystem-safe version of a string ``text`` """ pathable_slot = "".join([c if c.isalnum() or c in '-._' else '_' @@ -138,6 +107,25 @@ class ScrapyPriorityQueue(PriorityQueue): return request +class DownloaderInterface(object): + + def __init__(self, crawler): + self.downloader = crawler.engine.downloader + + def stats(self, possible_slots): + return [(self._active_downloads(slot), slot) + for slot in possible_slots] + + def get_slot_key(self, request): + return self.downloader._get_slot_key(request, None) + + def _active_downloads(self, slot): + """ Return a number of requests in a Downloader for a given slot """ + if slot not in self.downloader.slots: + return 0 + return len(self.downloader.slots[slot].active) + + class DownloaderAwarePriorityQueue(object): """ PriorityQueue which takes Downlaoder activity in account: domains (slots) with the least amount of active downloads are dequeued @@ -170,68 +158,25 @@ class DownloaderAwarePriorityQueue(object): def pqfactory(startprios=()): return ScrapyPriorityQueue(crawler, qfactory, startprios, serialize) self._slot_pqueues = _SlotPriorityQueues(pqfactory, slot_startprios) - - self._active_downloads = {slot: 0 for slot in self._slot_pqueues.pqueues} - crawler.signals.connect(self.on_response_download, - signal=request_left_downloader) - crawler.signals.connect(self.on_request_reached_downloader, - signal=request_reached_downloader) self.serialize = serialize - - # There are two PriorityQueues at the same time (memory and disk-based), - # and they both listen to Downloader signals. To filter out signals - # coming from the other queue, each queue keeps track of its own - # requests using mark / unmark / check_mark methods. - def mark(self, request): - request.meta[self._DOWNLOADER_AWARE_PQ_ID] = id(self) - - def check_mark(self, request): - return request.meta.get(self._DOWNLOADER_AWARE_PQ_ID, None) == id(self) - - def unmark(self, request): - del request.meta[self._DOWNLOADER_AWARE_PQ_ID] + self._downloader_interface = DownloaderInterface(crawler) def pop(self): - slots = [(active_downloads, slot) - for slot, active_downloads in self._active_downloads.items() - if slot in self._slot_pqueues] + stats = self._downloader_interface.stats(self._slot_pqueues.pqueues) - if not slots: + if not stats: return - slot = min(slots)[1] + slot = min(stats)[1] request = self._slot_pqueues.pop_slot(slot) - self.mark(request) return request def push(self, request, priority): - slot = _set_scheduler_slot(request) + slot = self._downloader_interface.get_slot_key(request) priority_slot = _Priority(priority=priority, slot=slot) self._slot_pqueues.push_slot(slot, request, priority_slot) - if slot not in self._active_downloads: - self._active_downloads[slot] = 0 - - def on_response_download(self, request, spider): - if not self.check_mark(request): - return - self.unmark(request) - - slot = _scheduler_slot_read(request) - if slot not in self._active_downloads or self._active_downloads[slot] <= 0: - raise ValueError('Got response for a wrong slot "%s"' % (slot, )) - self._active_downloads[slot] -= 1 - if self._active_downloads[slot] == 0 and slot not in self._slot_pqueues: - del self._active_downloads[slot] - - def on_request_reached_downloader(self, request, spider): - if not self.check_mark(request): - return - - slot = _scheduler_slot_read(request) - self._active_downloads[slot] = self._active_downloads.get(slot, 0) + 1 def close(self): - self._active_downloads.clear() active = self._slot_pqueues.close() return {slot: [p.priority for p in startprios] for slot, startprios in active.items()} diff --git a/tests/test_scheduler.py b/tests/test_scheduler.py index 1bcc1e5a8..75c0b7530 100644 --- a/tests/test_scheduler.py +++ b/tests/test_scheduler.py @@ -1,20 +1,50 @@ import shutil import tempfile import unittest +import collections from twisted.internet import defer from twisted.trial.unittest import TestCase from scrapy.crawler import Crawler +from scrapy.core.downloader import Downloader from scrapy.core.scheduler import Scheduler from scrapy.http import Request -from scrapy.pqueues import _scheduler_slot_read, _scheduler_slot_write -from scrapy.signals import request_reached_downloader, request_left_downloader from scrapy.spiders import Spider +from scrapy.utils.httpobj import urlparse_cached from scrapy.utils.test import get_crawler from tests.mockserver import MockServer +MockEngine = collections.namedtuple('MockEngine', ['downloader']) +MockSlot = collections.namedtuple('MockSlot', ['active']) + + +class MockDownloader: + def __init__(self): + self.slots = dict() + + def _set_slot_key(self, slot, request, spider): + request.meta[Downloader.DOWNLOAD_SLOT] = slot + + def _get_slot_key(self, request, spider): + if Downloader.DOWNLOAD_SLOT in request.meta: + return request.meta[Downloader.DOWNLOAD_SLOT] + + return urlparse_cached(request).hostname or '' + + def increment(self, slot_key): + slot = self.slots.setdefault(slot_key, MockSlot(active=list())) + slot.active.append(1) + + def decrement(self, slot_key): + slot = self.slots.get(slot_key) + slot.active.pop() + + def close(self): + pass + + class MockCrawler(Crawler): def __init__(self, priority_queue_cls, jobdir): @@ -27,6 +57,7 @@ class MockCrawler(Crawler): DUPEFILTER_CLASS='scrapy.dupefilters.BaseDupeFilter' ) super(MockCrawler, self).__init__(Spider, settings) + self.engine = MockEngine(downloader=MockDownloader()) class SchedulerHandler: @@ -42,6 +73,7 @@ class SchedulerHandler: def close_scheduler(self): self.scheduler.close('finished') self.mock_crawler.stop() + self.mock_crawler.engine.downloader.close() def setUp(self): self.create_scheduler() @@ -147,11 +179,11 @@ class BaseSchedulerOnDiskTester(SchedulerHandler): class TestSchedulerInMemory(BaseSchedulerInMemoryTester, unittest.TestCase): - priority_queue_cls = 'queuelib.PriorityQueue' + priority_queue_cls = 'scrapy.pqueues.ScrapyPriorityQueue' class TestSchedulerOnDisk(BaseSchedulerOnDiskTester, unittest.TestCase): - priority_queue_cls = 'queuelib.PriorityQueue' + priority_queue_cls = 'scrapy.pqueues.ScrapyPriorityQueue' _SLOTS = [("http://foo.com/a", 'a'), @@ -172,7 +204,7 @@ class TestMigration(unittest.TestCase): def _migration(self, tmp_dir): prev_scheduler_handler = SchedulerHandler() - prev_scheduler_handler.priority_queue_cls = 'queuelib.PriorityQueue' + prev_scheduler_handler.priority_queue_cls = 'scrapy.pqueues.ScrapyPriorityQueue' prev_scheduler_handler.jobdir = tmp_dir prev_scheduler_handler.create_scheduler() @@ -196,30 +228,25 @@ class TestSchedulerWithDownloaderAwareInMemory(BaseSchedulerInMemoryTester, priority_queue_cls = 'scrapy.pqueues.DownloaderAwarePriorityQueue' def test_logic(self): + downloader = self.mock_crawler.engine.downloader for url, slot in _SLOTS: request = Request(url) - _scheduler_slot_write(request, slot) + downloader._set_slot_key(slot, request, None) self.scheduler.enqueue_request(request) slots = list() requests = list() while self.scheduler.has_pending_requests(): request = self.scheduler.next_request() - slots.append(_scheduler_slot_read(request)) - self.mock_crawler.signals.send_catch_log( - signal=request_reached_downloader, - request=request, - spider=self.spider - ) + slot = downloader._get_slot_key(request, None) + slots.append(slot) + downloader.increment(slot) requests.append(request) self.assertEqual(len(slots), len(_SLOTS)) for request in requests: - self.mock_crawler.signals.send_catch_log( - signal=request_left_downloader, - request=request, - spider=self.spider - ) + slot = downloader._get_slot_key(request, None) + self.mock_crawler.engine.downloader.decrement(slot) unique_slots = len(set(s for _, s in _SLOTS)) for i in range(0, len(_SLOTS), unique_slots): @@ -239,9 +266,11 @@ class TestSchedulerWithDownloaderAwareOnDisk(BaseSchedulerOnDiskTester, priority_queue_cls = 'scrapy.pqueues.DownloaderAwarePriorityQueue' def test_logic(self): + downloader = self.mock_crawler.engine.downloader + for url, slot in _SLOTS: request = Request(url) - _scheduler_slot_write(request, slot) + downloader._set_slot_key(slot, request, None) self.scheduler.enqueue_request(request) self.close_scheduler() @@ -249,27 +278,22 @@ class TestSchedulerWithDownloaderAwareOnDisk(BaseSchedulerOnDiskTester, slots = [] requests = [] + downloader = self.mock_crawler.engine.downloader while self.scheduler.has_pending_requests(): request = self.scheduler.next_request() - slots.append(_scheduler_slot_read(request)) - self.mock_crawler.signals.send_catch_log( - signal=request_reached_downloader, - request=request, - spider=self.spider - ) + slot = downloader._get_slot_key(request, None) + slots.append(slot) + downloader.increment(slot) requests.append(request) - self.assertEqual(self.scheduler.mqs._active_downloads, {}) self.assertEqual(len(slots), len(_SLOTS)) for request in requests: - self.mock_crawler.signals.send_catch_log( - signal=request_left_downloader, - request=request, - spider=self.spider - ) + slot = downloader._get_slot_key(request, None) + downloader.decrement(slot) _is_slots_unique(_SLOTS, slots) + self.assertEqual(sum(len(s.active) for s in downloader.slots.values()), 0) class StartUrlsSpider(Spider): @@ -277,6 +301,9 @@ class StartUrlsSpider(Spider): def __init__(self, start_urls): self.start_urls = start_urls + def parse(self, response): + pass + class TestIntegrationWithDownloaderAwareOnDisk(TestCase): def setUp(self): From 989bba6cb340fcc1ddb32e75ade567864d8b3884 Mon Sep 17 00:00:00 2001 From: Vostretsov Nikita Date: Thu, 7 Mar 2019 09:00:14 +0000 Subject: [PATCH 315/889] Revert "new signal" This reverts commit 646164fd7d6dd52061804d2df7424cff929bf739. remove tests Revert "emit new signal" This reverts commit fcde0c6880678957a76af6083b6248f430a00fcf. Revert "documentation for new signal" This reverts commit 8aeb9f696ece95c16499a96767a7afa3d9c4abf4. --- docs/topics/signals.rst | 17 --------- scrapy/core/downloader/__init__.py | 3 -- scrapy/signals.py | 1 - tests/test_request_left.py | 59 ------------------------------ 4 files changed, 80 deletions(-) delete mode 100644 tests/test_request_left.py diff --git a/docs/topics/signals.rst b/docs/topics/signals.rst index f13e8270c..ff07b9d55 100644 --- a/docs/topics/signals.rst +++ b/docs/topics/signals.rst @@ -295,23 +295,6 @@ request_reached_downloader :param spider: the spider that yielded the request :type spider: :class:`~scrapy.spiders.Spider` object -request_left_downloader ---------------------------- - -.. signal:: request_left_downloader -.. function:: request_left_downloader(request, spider) - - Sent when a :class:`~scrapy.http.Request` left downloader even in case of - failure. - - The signal does not support returning deferreds from their handlers. - - :param request: the request that reached downloader - :type request: :class:`~scrapy.http.Request` object - - :param spider: the spider that yielded the request - :type spider: :class:`~scrapy.spiders.Spider` object - response_received ----------------- diff --git a/scrapy/core/downloader/__init__.py b/scrapy/core/downloader/__init__.py index d856a2f37..4695d75f4 100644 --- a/scrapy/core/downloader/__init__.py +++ b/scrapy/core/downloader/__init__.py @@ -188,9 +188,6 @@ class Downloader(object): def finish_transferring(_): slot.transferring.remove(request) self._process_queue(spider, slot) - self.signals.send_catch_log(signal=signals.request_left_downloader, - request=request, - spider=spider) return _ return dfd.addBoth(finish_transferring) diff --git a/scrapy/signals.py b/scrapy/signals.py index 2ea986b8c..c0e4bb74e 100644 --- a/scrapy/signals.py +++ b/scrapy/signals.py @@ -14,7 +14,6 @@ spider_error = object() request_scheduled = object() request_dropped = object() request_reached_downloader = object() -request_left_downloader = object() response_received = object() response_downloaded = object() item_scraped = object() diff --git a/tests/test_request_left.py b/tests/test_request_left.py deleted file mode 100644 index ddeca0499..000000000 --- a/tests/test_request_left.py +++ /dev/null @@ -1,59 +0,0 @@ -from twisted.internet import defer -from twisted.trial.unittest import TestCase -from scrapy.signals import request_left_downloader -from scrapy.spiders import Spider -from scrapy.utils.test import get_crawler -from tests.mockserver import MockServer - -class SignalCatcherSpider(Spider): - name = 'signal_catcher' - - def __init__(self, crawler, url, *args, **kwargs): - super(SignalCatcherSpider, self).__init__(*args, **kwargs) - crawler.signals.connect(self.on_response_download, - signal=request_left_downloader) - self.catched_times = 0 - self.start_urls = [url] - - @classmethod - def from_crawler(cls, crawler, *args, **kwargs): - spider = cls(crawler, *args, **kwargs) - return spider - - def on_response_download(self, request, spider): - self.catched_times = self.catched_times + 1 - - -class TestCatching(TestCase): - - def setUp(self): - self.mockserver = MockServer() - self.mockserver.__enter__() - - def tearDown(self): - self.mockserver.__exit__(None, None, None) - - @defer.inlineCallbacks - def test_success(self): - crawler = get_crawler(SignalCatcherSpider) - yield crawler.crawl(self.mockserver.url("/status?n=200")) - self.assertEqual(crawler.spider.catched_times, 1) - - @defer.inlineCallbacks - def test_timeout(self): - crawler = get_crawler(SignalCatcherSpider, - {'DOWNLOAD_TIMEOUT': 0.1}) - yield crawler.crawl(self.mockserver.url("/delay?n=0.2")) - self.assertEqual(crawler.spider.catched_times, 1) - - @defer.inlineCallbacks - def test_disconnect(self): - crawler = get_crawler(SignalCatcherSpider) - yield crawler.crawl(self.mockserver.url("/drop")) - self.assertEqual(crawler.spider.catched_times, 1) - - @defer.inlineCallbacks - def test_noconnect(self): - crawler = get_crawler(SignalCatcherSpider) - yield crawler.crawl('http://thereisdefinetelynosuchdomain.com') - self.assertEqual(crawler.spider.catched_times, 1) From 8afffb7234b282dd8bd28eec2e4eb8e3f86b5723 Mon Sep 17 00:00:00 2001 From: Vostretsov Nikita Date: Fri, 22 Mar 2019 09:12:23 +0000 Subject: [PATCH 316/889] Tests Cleanup add doctest for function no need in this variables move common assertion inside function rename variable rename variables rename function use function this is not a method of public API correct name for test Update docs/topics/settings.rst Co-Authored-By: whalebot-helmsman --- docs/topics/settings.rst | 4 +- tests/test_scheduler.py | 82 ++++++++++++++++++++++------------------ 2 files changed, 48 insertions(+), 38 deletions(-) diff --git a/docs/topics/settings.rst b/docs/topics/settings.rst index 6e13e64d6..cf454f4ec 100644 --- a/docs/topics/settings.rst +++ b/docs/topics/settings.rst @@ -1146,9 +1146,9 @@ Default: ``'scrapy.pqueues.ScrapyPriorityQueue'`` Type of priority queue used by scheduler. Another available type is ``scrapy.pqueues.DownloaderAwarePriorityQueue``. -``scrapy.pqueues.DownloaderAwarePriorityQueue`` is works better than +``scrapy.pqueues.DownloaderAwarePriorityQueue`` works better than ``scrapy.pqueues.ScrapyPriorityQueue`` when you crawl many different -domains in parallel. But ``scrapy.pqueues.DownloaderAwarePriorityQueue`` +domains in parallel. But currently ``scrapy.pqueues.DownloaderAwarePriorityQueue`` does not work together with :setting:`CONCURRENT_REQUESTS_PER_IP`. .. setting:: SPIDER_CONTRACTS diff --git a/tests/test_scheduler.py b/tests/test_scheduler.py index 75c0b7530..eaf748d35 100644 --- a/tests/test_scheduler.py +++ b/tests/test_scheduler.py @@ -24,9 +24,6 @@ class MockDownloader: def __init__(self): self.slots = dict() - def _set_slot_key(self, slot, request, spider): - request.meta[Downloader.DOWNLOAD_SLOT] = slot - def _get_slot_key(self, request, spider): if Downloader.DOWNLOAD_SLOT in request.meta: return request.meta[Downloader.DOWNLOAD_SLOT] @@ -186,12 +183,12 @@ class TestSchedulerOnDisk(BaseSchedulerOnDiskTester, unittest.TestCase): priority_queue_cls = 'scrapy.pqueues.ScrapyPriorityQueue' -_SLOTS = [("http://foo.com/a", 'a'), - ("http://foo.com/b", 'a'), - ("http://foo.com/c", 'b'), - ("http://foo.com/d", 'b'), - ("http://foo.com/e", 'c'), - ("http://foo.com/f", 'c')] +_URLS_WITH_SLOTS = [("http://foo.com/a", 'a'), + ("http://foo.com/b", 'a'), + ("http://foo.com/c", 'b'), + ("http://foo.com/d", 'b'), + ("http://foo.com/e", 'c'), + ("http://foo.com/f", 'c')] class TestMigration(unittest.TestCase): @@ -228,37 +225,52 @@ class TestSchedulerWithDownloaderAwareInMemory(BaseSchedulerInMemoryTester, priority_queue_cls = 'scrapy.pqueues.DownloaderAwarePriorityQueue' def test_logic(self): - downloader = self.mock_crawler.engine.downloader - for url, slot in _SLOTS: + for url, slot in _URLS_WITH_SLOTS: request = Request(url) - downloader._set_slot_key(slot, request, None) + request.meta[Downloader.DOWNLOAD_SLOT] = slot self.scheduler.enqueue_request(request) - slots = list() + downloader = self.mock_crawler.engine.downloader + dequeued_slots = list() requests = list() while self.scheduler.has_pending_requests(): request = self.scheduler.next_request() slot = downloader._get_slot_key(request, None) - slots.append(slot) + dequeued_slots.append(slot) downloader.increment(slot) requests.append(request) - self.assertEqual(len(slots), len(_SLOTS)) for request in requests: slot = downloader._get_slot_key(request, None) self.mock_crawler.engine.downloader.decrement(slot) - unique_slots = len(set(s for _, s in _SLOTS)) - for i in range(0, len(_SLOTS), unique_slots): - part = slots[i:i + unique_slots] - self.assertEqual(len(part), len(set(part))) + self.assertTrue(_is_scheduling_fair(list(s for u, s in _URLS_WITH_SLOTS), + dequeued_slots)) -def _is_slots_unique(base_slots, result_slots): - unique_slots = len(set(s for _, s in base_slots)) - for i in range(0, len(result_slots), unique_slots): - part = result_slots[i:i + unique_slots] - assert len(part) == len(set(part)) +def _is_scheduling_fair(enqueued_slots, dequeued_slots): + """ + We enqueued same number of requests for every slot. + Assert correct order, e.g. + + >>> enqueued = ['a', 'b', 'c'] * 2 + >>> correct = ['a', 'c', 'b', 'b', 'a', 'c'] + >>> incorrect = ['a', 'a', 'b', 'c', 'c', 'b'] + >>> _is_scheduling_fair(enqueued, correct) + True + >>> _is_scheduling_fair(enqueued, incorrect) + False + """ + if len(dequeued_slots) != len(enqueued_slots): + return False + + slots_number = len(set(enqueued_slots)) + for i in range(0, len(dequeued_slots), slots_number): + part = dequeued_slots[i:i + slots_number] + if len(part) != len(set(part)): + return False + + return True class TestSchedulerWithDownloaderAwareOnDisk(BaseSchedulerOnDiskTester, @@ -266,33 +278,31 @@ class TestSchedulerWithDownloaderAwareOnDisk(BaseSchedulerOnDiskTester, priority_queue_cls = 'scrapy.pqueues.DownloaderAwarePriorityQueue' def test_logic(self): - downloader = self.mock_crawler.engine.downloader - for url, slot in _SLOTS: + for url, slot in _URLS_WITH_SLOTS: request = Request(url) - downloader._set_slot_key(slot, request, None) + request.meta[Downloader.DOWNLOAD_SLOT] = slot self.scheduler.enqueue_request(request) self.close_scheduler() self.create_scheduler() - slots = [] + dequeued_slots = list() requests = [] downloader = self.mock_crawler.engine.downloader while self.scheduler.has_pending_requests(): request = self.scheduler.next_request() slot = downloader._get_slot_key(request, None) - slots.append(slot) + dequeued_slots.append(slot) downloader.increment(slot) requests.append(request) - self.assertEqual(len(slots), len(_SLOTS)) - for request in requests: slot = downloader._get_slot_key(request, None) downloader.decrement(slot) - _is_slots_unique(_SLOTS, slots) + self.assertTrue(_is_scheduling_fair(list(s for u, s in _URLS_WITH_SLOTS), + dequeued_slots)) self.assertEqual(sum(len(s.active) for s in downloader.slots.values()), 0) @@ -305,7 +315,7 @@ class StartUrlsSpider(Spider): pass -class TestIntegrationWithDownloaderAwareOnDisk(TestCase): +class TestIntegrationWithDownloaderAwareInMemory(TestCase): def setUp(self): self.crawler = get_crawler( StartUrlsSpider, @@ -322,10 +332,10 @@ class TestIntegrationWithDownloaderAwareOnDisk(TestCase): with MockServer() as mockserver: url = mockserver.url("/status?n=200", is_secure=False) - slots = [url] * 6 - yield self.crawler.crawl(slots) + start_urls = [url] * 6 + yield self.crawler.crawl(start_urls) self.assertEqual(self.crawler.stats.get_value('downloader/response_count'), - len(slots)) + len(start_urls)) class TestIncompatibility(unittest.TestCase): From df574de8cc5c58618f6075ca3afb14059a9e30ed Mon Sep 17 00:00:00 2001 From: Lucy Wang Date: Sat, 23 Mar 2019 00:54:39 +0800 Subject: [PATCH 317/889] improve tests and fix some lint warnings (#6) * refactor downloader-aware test cases * fix lint * add doctest for _path_safe * remove unused code * better doctest --- scrapy/pqueues.py | 12 +++++++-- tests/test_scheduler.py | 57 ++++++++++++++++------------------------- 2 files changed, 32 insertions(+), 37 deletions(-) diff --git a/scrapy/pqueues.py b/scrapy/pqueues.py index 0681e6729..6ecd1b51a 100644 --- a/scrapy/pqueues.py +++ b/scrapy/pqueues.py @@ -11,7 +11,16 @@ logger = logging.getLogger(__name__) def _path_safe(text): - """ Return a filesystem-safe version of a string ``text`` """ + """ + Return a filesystem-safe version of a string ``text`` + + >>> _path_safe('simple.org').startswith('simple.org') + True + >>> _path_safe('dash-underscore_.org').startswith('dash-underscore_.org') + True + >>> _path_safe('some@symbol?').startswith('some_symbol_') + True + """ pathable_slot = "".join([c if c.isalnum() or c in '-._' else '_' for c in text]) # as we replace some letters we can get collision for different slots @@ -131,7 +140,6 @@ class DownloaderAwarePriorityQueue(object): domains (slots) with the least amount of active downloads are dequeued first. """ - _DOWNLOADER_AWARE_PQ_ID = '_DOWNLOADER_AWARE_PQ_ID' @classmethod def from_crawler(cls, crawler, qfactory, slot_startprios=None, serialize=False): diff --git a/tests/test_scheduler.py b/tests/test_scheduler.py index eaf748d35..e0e3600e5 100644 --- a/tests/test_scheduler.py +++ b/tests/test_scheduler.py @@ -20,7 +20,7 @@ MockEngine = collections.namedtuple('MockEngine', ['downloader']) MockSlot = collections.namedtuple('MockSlot', ['active']) -class MockDownloader: +class MockDownloader(object): def __init__(self): self.slots = dict() @@ -57,7 +57,7 @@ class MockCrawler(Crawler): self.engine = MockEngine(downloader=MockDownloader()) -class SchedulerHandler: +class SchedulerHandler(object): priority_queue_cls = None jobdir = None @@ -220,34 +220,6 @@ class TestMigration(unittest.TestCase): self._migration(self.tmpdir) -class TestSchedulerWithDownloaderAwareInMemory(BaseSchedulerInMemoryTester, - unittest.TestCase): - priority_queue_cls = 'scrapy.pqueues.DownloaderAwarePriorityQueue' - - def test_logic(self): - for url, slot in _URLS_WITH_SLOTS: - request = Request(url) - request.meta[Downloader.DOWNLOAD_SLOT] = slot - self.scheduler.enqueue_request(request) - - downloader = self.mock_crawler.engine.downloader - dequeued_slots = list() - requests = list() - while self.scheduler.has_pending_requests(): - request = self.scheduler.next_request() - slot = downloader._get_slot_key(request, None) - dequeued_slots.append(slot) - downloader.increment(slot) - requests.append(request) - - for request in requests: - slot = downloader._get_slot_key(request, None) - self.mock_crawler.engine.downloader.decrement(slot) - - self.assertTrue(_is_scheduling_fair(list(s for u, s in _URLS_WITH_SLOTS), - dequeued_slots)) - - def _is_scheduling_fair(enqueued_slots, dequeued_slots): """ We enqueued same number of requests for every slot. @@ -273,31 +245,33 @@ def _is_scheduling_fair(enqueued_slots, dequeued_slots): return True -class TestSchedulerWithDownloaderAwareOnDisk(BaseSchedulerOnDiskTester, - unittest.TestCase): +class DownloaderAwareSchedulerTestMixin(object): priority_queue_cls = 'scrapy.pqueues.DownloaderAwarePriorityQueue' + reopen = False def test_logic(self): - for url, slot in _URLS_WITH_SLOTS: request = Request(url) request.meta[Downloader.DOWNLOAD_SLOT] = slot self.scheduler.enqueue_request(request) - self.close_scheduler() - self.create_scheduler() + if self.reopen: + self.close_scheduler() + self.create_scheduler() dequeued_slots = list() requests = [] downloader = self.mock_crawler.engine.downloader while self.scheduler.has_pending_requests(): request = self.scheduler.next_request() + # pylint: disable=protected-access slot = downloader._get_slot_key(request, None) dequeued_slots.append(slot) downloader.increment(slot) requests.append(request) for request in requests: + # pylint: disable=protected-access slot = downloader._get_slot_key(request, None) downloader.decrement(slot) @@ -306,10 +280,23 @@ class TestSchedulerWithDownloaderAwareOnDisk(BaseSchedulerOnDiskTester, self.assertEqual(sum(len(s.active) for s in downloader.slots.values()), 0) +class TestSchedulerWithDownloaderAwareInMemory(DownloaderAwareSchedulerTestMixin, + BaseSchedulerInMemoryTester, + unittest.TestCase): + pass + + +class TestSchedulerWithDownloaderAwareOnDisk(DownloaderAwareSchedulerTestMixin, + BaseSchedulerOnDiskTester, + unittest.TestCase): + reopen = True + + class StartUrlsSpider(Spider): def __init__(self, start_urls): self.start_urls = start_urls + super(StartUrlsSpider, self).__init__(start_urls) def parse(self, response): pass From 31b8a6b33aed9e77a4d37a5c83b1545202207cad Mon Sep 17 00:00:00 2001 From: Vostretsov Nikita Date: Mon, 25 Mar 2019 08:53:15 +0000 Subject: [PATCH 318/889] report warnings --- tests/test_crawler.py | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/tests/test_crawler.py b/tests/test_crawler.py index 268948a70..d9ec9ee8d 100644 --- a/tests/test_crawler.py +++ b/tests/test_crawler.py @@ -1,5 +1,4 @@ import logging -import tempfile import warnings from twisted.internet import defer @@ -37,7 +36,11 @@ class CrawlerTestCase(BaseCrawlerTest): self.assertIsInstance(spiders, sl_cls) self.crawler.spiders - self.assertEqual(len(w), 1, "Warn deprecated access only once") + is_one_warning = len(w) == 1 + if not is_one_warning: + for warning in w: + print(warning) + self.assertTrue(is_one_warning, "Warn deprecated access only once") def test_populate_spidercls_settings(self): spider_settings = {'TEST1': 'spider', 'TEST2': 'spider'} From 73e4ff5304d273404a147d06726a8ae8cae1c925 Mon Sep 17 00:00:00 2001 From: Vostretsov Nikita Date: Mon, 25 Mar 2019 13:48:58 +0000 Subject: [PATCH 319/889] report warnings --- tests/test_crawler.py | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/tests/test_crawler.py b/tests/test_crawler.py index 8c4bbe0d9..e811c5757 100644 --- a/tests/test_crawler.py +++ b/tests/test_crawler.py @@ -182,8 +182,12 @@ class CrawlerRunnerTestCase(BaseCrawlerTest): 'SPIDER_MANAGER_CLASS': 'tests.test_crawler.CustomSpiderLoader' }) self.assertIsInstance(runner.spider_loader, CustomSpiderLoader) - self.assertEqual(len(w), 1) + is_one_warning = len(w) == 1 + if not is_one_warning: + for warning in w: + print(warning) self.assertIn('Please use SPIDER_LOADER_CLASS', str(w[0].message)) + self.assertTrue(is_one_warning) def test_crawl_rejects_spider_objects(self): with raises(ValueError): From 431f18a9a1a87ac8b789e3c260016e510ab48ad3 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Adri=C3=A1n=20Chaves?= Date: Fri, 1 Feb 2019 13:22:38 +0100 Subject: [PATCH 320/889] Document FilesPipeline.file_path and ImagesPipeline.file_path --- docs/topics/media-pipeline.rst | 60 ++++++++++++++++++++++++++++++++++ 1 file changed, 60 insertions(+) diff --git a/docs/topics/media-pipeline.rst b/docs/topics/media-pipeline.rst index c60b55391..c97b4c3c2 100644 --- a/docs/topics/media-pipeline.rst +++ b/docs/topics/media-pipeline.rst @@ -392,6 +392,36 @@ See here the methods that you can override in your custom Files Pipeline: .. class:: FilesPipeline + .. method:: file_path(request, response, info) + + This method is called once per downloaded item. It returns the + download path of the file originating from the specified + :class:`response `. + + In addition to ``response``, this method receives the original + :class:`request ` and + :class:`info `. + + You can override this method to customize the download path of each file. + + For example, if file URLs end like regular paths (e.g. + ``https://example.com/a/b/c/foo.png``), you can use the following + approach to download all files into the ``files`` folder with their + original filenames (e.g. ``files/foo.png``):: + + import os + from urllib.parse import urlparse + + from scrapy.pipelines.files import FilesPipeline + + class MyFilesPipeline(FilesPipeline): + + def file_path(self, request, response, info): + return 'files/' + os.path.basename(urlparse(request.url).path) + + By default the :meth:`file_path` method returns + ``full/.``. + .. method:: FilesPipeline.get_media_requests(item, info) As seen on the workflow, the pipeline will get the URLs of the images to @@ -475,6 +505,36 @@ See here the methods that you can override in your custom Images Pipeline: The :class:`ImagesPipeline` is an extension of the :class:`FilesPipeline`, customizing the field names and adding custom behavior for images. + .. method:: file_path(request, response, info) + + This method is called once per downloaded item. It returns the + download path of the file originating from the specified + :class:`response `. + + In addition to ``response``, this method receives the original + :class:`request ` and + :class:`info `. + + You can override this method to customize the download path of each file. + + For example, if file URLs end like regular paths (e.g. + ``https://example.com/a/b/c/foo.png``), you can use the following + approach to download all files into the ``files`` folder with their + original filenames (e.g. ``files/foo.png``):: + + import os + from urllib.parse import urlparse + + from scrapy.pipelines.images import ImagesPipeline + + class MyImagesPipeline(ImagesPipeline): + + def file_path(self, request, response, info): + return 'files/' + os.path.basename(urlparse(request.url).path) + + By default the :meth:`file_path` method returns + ``full/.``. + .. method:: ImagesPipeline.get_media_requests(item, info) Works the same way as :meth:`FilesPipeline.get_media_requests` method, From 2fd8b7c28c255148f6d7320cb97292ab2d569eff Mon Sep 17 00:00:00 2001 From: Maram Sumanth Date: Wed, 27 Mar 2019 00:45:53 +0530 Subject: [PATCH 321/889] [MRG+1] redirect_reasons in Request.meta (#3687) --- docs/topics/downloader-middleware.rst | 16 ++++++++++++++-- docs/topics/request-response.rst | 1 + scrapy/downloadermiddlewares/redirect.py | 2 ++ tests/test_downloadermiddleware_redirect.py | 19 +++++++++++++++++++ 4 files changed, 36 insertions(+), 2 deletions(-) diff --git a/docs/topics/downloader-middleware.rst b/docs/topics/downloader-middleware.rst index 0d976077b..f2f3ef466 100644 --- a/docs/topics/downloader-middleware.rst +++ b/docs/topics/downloader-middleware.rst @@ -733,6 +733,17 @@ RedirectMiddleware The urls which the request goes through (while being redirected) can be found in the ``redirect_urls`` :attr:`Request.meta ` key. +.. reqmeta:: redirect_reasons + +The reason behind each redirect in :reqmeta:`redirect_urls` can be found in the +``redirect_reasons`` :attr:`Request.meta ` key. For +example: ``[301, 302, 307, 'meta refresh']``. + +The format of a reason depends on the middleware that handled the corresponding +redirect. For example, :class:`RedirectMiddleware` indicates the triggering +response status code as an integer, while :class:`MetaRefreshMiddleware` +always uses the ``'meta refresh'`` string as reason. + The :class:`RedirectMiddleware` can be configured through the following settings (see the settings documentation for more info): @@ -796,8 +807,9 @@ settings (see the settings documentation for more info): * :setting:`METAREFRESH_ENABLED` * :setting:`METAREFRESH_MAXDELAY` -This middleware obey :setting:`REDIRECT_MAX_TIMES` setting, :reqmeta:`dont_redirect` -and :reqmeta:`redirect_urls` request meta keys as described for :class:`RedirectMiddleware` +This middleware obey :setting:`REDIRECT_MAX_TIMES` setting, :reqmeta:`dont_redirect`, +:reqmeta:`redirect_urls` and :reqmeta:`redirect_reasons` request meta keys as described +for :class:`RedirectMiddleware` MetaRefreshMiddleware settings diff --git a/docs/topics/request-response.rst b/docs/topics/request-response.rst index ca59b46d8..ac6fe6e3f 100644 --- a/docs/topics/request-response.rst +++ b/docs/topics/request-response.rst @@ -299,6 +299,7 @@ Those are: * :reqmeta:`dont_merge_cookies` * :reqmeta:`cookiejar` * :reqmeta:`dont_cache` +* :reqmeta:`redirect_reasons` * :reqmeta:`redirect_urls` * :reqmeta:`bindaddress` * :reqmeta:`dont_obey_robotstxt` diff --git a/scrapy/downloadermiddlewares/redirect.py b/scrapy/downloadermiddlewares/redirect.py index 30cae3fee..cb59d3fd2 100644 --- a/scrapy/downloadermiddlewares/redirect.py +++ b/scrapy/downloadermiddlewares/redirect.py @@ -34,6 +34,8 @@ class BaseRedirectMiddleware(object): redirected.meta['redirect_ttl'] = ttl - 1 redirected.meta['redirect_urls'] = request.meta.get('redirect_urls', []) + \ [request.url] + redirected.meta['redirect_reasons'] = request.meta.get('redirect_reasons', []) + \ + [reason] redirected.dont_filter = request.dont_filter redirected.priority = request.priority + self.priority_adjust logger.debug("Redirecting (%(reason)s) to %(redirected)s from %(request)s", diff --git a/tests/test_downloadermiddleware_redirect.py b/tests/test_downloadermiddleware_redirect.py index 74137b4cd..6c81c94ca 100644 --- a/tests/test_downloadermiddleware_redirect.py +++ b/tests/test_downloadermiddleware_redirect.py @@ -139,6 +139,16 @@ class RedirectMiddlewareTest(unittest.TestCase): self.assertEqual(req3.url, 'http://scrapytest.org/redirected2') self.assertEqual(req3.meta['redirect_urls'], ['http://scrapytest.org/first', 'http://scrapytest.org/redirected']) + def test_redirect_reasons(self): + req1 = Request('http://scrapytest.org/first') + rsp1 = Response('http://scrapytest.org/first', headers={'Location': '/redirected1'}, status=301) + req2 = self.mw.process_response(req1, rsp1, self.spider) + rsp2 = Response('http://scrapytest.org/redirected1', headers={'Location': '/redirected2'}, status=301) + req3 = self.mw.process_response(req2, rsp2, self.spider) + + self.assertEqual(req2.meta['redirect_reasons'], [301]) + self.assertEqual(req3.meta['redirect_reasons'], [301, 301]) + def test_spider_handling(self): smartspider = self.crawler._create_spider('smarty') smartspider.handle_httpstatus_list = [404, 301, 302] @@ -259,6 +269,15 @@ class MetaRefreshMiddlewareTest(unittest.TestCase): self.assertEqual(req3.url, 'http://scrapytest.org/redirected2') self.assertEqual(req3.meta['redirect_urls'], ['http://scrapytest.org/first', 'http://scrapytest.org/redirected']) + def test_redirect_reasons(self): + req1 = Request('http://scrapytest.org/first') + rsp1 = HtmlResponse('http://scrapytest.org/first', body=self._body(url='/redirected')) + req2 = self.mw.process_response(req1, rsp1, self.spider) + rsp2 = HtmlResponse('http://scrapytest.org/redirected', body=self._body(url='/redirected1')) + req3 = self.mw.process_response(req2, rsp2, self.spider) + + self.assertEqual(req2.meta['redirect_reasons'], ['meta refresh']) + self.assertEqual(req3.meta['redirect_reasons'], ['meta refresh', 'meta refresh']) if __name__ == "__main__": unittest.main() From ce837b0f740e989520cce58d1606a528b598503e Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Adri=C3=A1n=20Chaves?= Date: Mon, 25 Mar 2019 18:04:04 +0100 Subject: [PATCH 322/889] Update the documentation policies: Ask to use docstrings to document API members --- docs/contributing.rst | 22 +++++++++++----------- 1 file changed, 11 insertions(+), 11 deletions(-) diff --git a/docs/contributing.rst b/docs/contributing.rst index 9b508e418..aac0f4496 100644 --- a/docs/contributing.rst +++ b/docs/contributing.rst @@ -165,18 +165,18 @@ Scrapy: Documentation policies ====================== -* **Don't** use docstrings for documenting classes, or methods which are - already documented in the official (sphinx) documentation. Alternatively, - **do** provide a docstring, but make sure sphinx documentation uses - autodoc_ extension to pull the docstring. For example, the - :meth:`ItemLoader.add_value` method should be either - documented only in the sphinx documentation (not as a docstring), or - it should have a docstring which is pulled to sphinx documentation using - autodoc_ extension. +For reference documentation of API members (classes, methods, etc.) use +docstrings and make sure that the Sphinx documentation uses the autodoc_ +extension to pull the docstrings. API reference documentation should be +IDE-friendly: short, to the point, and it may provide short examples. -* **Do** use docstrings for documenting functions not present in the official - (sphinx) documentation, such as functions from ``scrapy.utils`` package and - its sub-modules. +Other types of documentation, such as tutorials or topics, should be covered in +files within the ``docs/`` directory. This includes documentation that is +specific to an API member, but goes beyond API reference documentation. + +In any case, if something is covered in a docstring, use the autodoc_ +extension to pull the docstring into the documentation instead of duplicating +the docstring in files within the ``docs/`` directory. .. _autodoc: http://www.sphinx-doc.org/en/stable/ext/autodoc.html From 845bae6637239c859c9952c23f42902e36d10f6b Mon Sep 17 00:00:00 2001 From: Mikhail Korobov Date: Wed, 27 Mar 2019 08:49:19 +0000 Subject: [PATCH 323/889] Update docs/topics/broad-crawls.rst Co-Authored-By: whalebot-helmsman --- docs/topics/broad-crawls.rst | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/docs/topics/broad-crawls.rst b/docs/topics/broad-crawls.rst index 37f7a8748..64c8883b1 100644 --- a/docs/topics/broad-crawls.rst +++ b/docs/topics/broad-crawls.rst @@ -42,7 +42,7 @@ efficient broad crawl. Use proper :setting:`SCHEDULER_PRIORITY_QUEUE` ============================================== -Default scrapy's scheduler priority queue is ``'queuelib.PriorityQueue'``. +Default scrapy's scheduler priority queue is ``'scrapy.pqueues.ScrapyPriorityQueue'``. It works best during single domain crawl. And it does not work well with crawling many different domains in parallel From 9c9bca4e1c7984089c44f3a44e7594e06307b12f Mon Sep 17 00:00:00 2001 From: Anubhav Patel Date: Wed, 27 Mar 2019 18:29:48 +0530 Subject: [PATCH 324/889] make suggested changes. --- docs/topics/downloader-middleware.rst | 18 ++++++++++-------- 1 file changed, 10 insertions(+), 8 deletions(-) diff --git a/docs/topics/downloader-middleware.rst b/docs/topics/downloader-middleware.rst index f913b059d..dfbcdb8fa 100644 --- a/docs/topics/downloader-middleware.rst +++ b/docs/topics/downloader-middleware.rst @@ -349,7 +349,7 @@ HttpCacheMiddleware * :ref:`httpcache-storage-leveldb` You can change the HTTP cache storage backend with the :setting:`HTTPCACHE_STORAGE` - setting. Or you can also implement your own storage backend. + setting. Or you can also :ref:`implement your own storage backend. ` Scrapy ships with two HTTP cache policies: @@ -498,10 +498,10 @@ In order to use this storage backend: .. _httpcache-storage-custom: -Implementing custom cache storage backend -~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +Writing your own storage backend +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ -You can implement custom cache storage backend by creating a Python class that +You can implement a cache storage backend by creating a Python class that defines the methods described below. .. module:: scrapy.extensions.httpcache @@ -510,14 +510,16 @@ defines the methods described below. .. method:: open_spider(spider) - This method gets called after a spider has been opened for crawling. + This method gets called after a spider has been opened for crawling. It handles + the :signal:`open_spider ` signal. :param spider: the spider which has been opened :type spider: :class:`~scrapy.spiders.Spider` object .. method:: close_spider(spider) - This method gets called after a spider has been closed. + This method gets called after a spider has been closed. It handles + the :signal:`close_spider ` signal. :param spider: the spider which has been closed :type spider: :class:`~scrapy.spiders.Spider` object @@ -539,7 +541,7 @@ defines the methods described below. :param spider: the spider for which the response is intended :type spider: :class:`~scrapy.spiders.Spider` object - :param request: corresponding request the spider generated + :param request: the corresponding request the spider generated :type request: :class:`~scrapy.http.Request` object :param response: the response to store in the cache @@ -547,7 +549,7 @@ defines the methods described below. In order to use your storage backend, set: -* :setting:`HTTPCACHE_STORAGE` to path of your custom storage class. +* :setting:`HTTPCACHE_STORAGE` to the Python import path of your custom storage class. HTTPCache middleware settings From 8528f5065f99046b149b5e1901d6cbe5296f048a Mon Sep 17 00:00:00 2001 From: Eugenio Lacuesta Date: Wed, 27 Mar 2019 14:42:26 -0300 Subject: [PATCH 325/889] [Doc] Update cb_kwargs example --- docs/topics/request-response.rst | 22 +++++++++++----------- 1 file changed, 11 insertions(+), 11 deletions(-) diff --git a/docs/topics/request-response.rst b/docs/topics/request-response.rst index b3f849540..61789be0f 100644 --- a/docs/topics/request-response.rst +++ b/docs/topics/request-response.rst @@ -233,19 +233,19 @@ The following two examples show how to achieve this by using the :: - def parse_page1(self, response): - item = MyItem() - item['main_url'] = response.url - request = scrapy.Request("http://www.example.com/some_page.html", - callback=self.parse_page2) - request.cb_kwargs['item'] = item - request.cb_kwargs['foo'] = 'bar' + def parse(self, response): + request = scrapy.Request('http://www.example.com/index.html', + callback=self.parse_page2, + cb_kwargs=dict(main_url=response.url)) + request.cb_kwargs['foo'] = 'bar' # add more arguments for the callback yield request - def parse_page2(self, response, item, foo): - item['other_url'] = response.url - item['foo'] = foo - yield item + def parse_page2(self, response, main_url, foo): + yield dict( + main_url=main_url, + other_url=response.url, + foo=foo, + ) .. _topics-request-response-ref-errbacks: From 70a4d93aa324fb276e60d641b37bdc6eb707b1cb Mon Sep 17 00:00:00 2001 From: Eugenio Lacuesta Date: Thu, 28 Mar 2019 10:40:41 -0300 Subject: [PATCH 326/889] Callback kwargs: more tests --- tests/spiders.py | 22 ++++++++++++++++++++++ tests/test_crawl.py | 21 ++++++++++++++++++++- 2 files changed, 42 insertions(+), 1 deletion(-) diff --git a/tests/spiders.py b/tests/spiders.py index a06985837..8c8d50ff5 100644 --- a/tests/spiders.py +++ b/tests/spiders.py @@ -39,6 +39,9 @@ class KeywordArgumentsSpider(MockServerSpider): yield Request(self.mockserver.url('/general_with'), self.parse_general, cb_kwargs=data) yield Request(self.mockserver.url('/general_without'), self.parse_general) yield Request(self.mockserver.url('/no_kwargs'), self.parse_no_kwargs) + yield Request(self.mockserver.url('/default'), self.parse_default, cb_kwargs=data) + yield Request(self.mockserver.url('/takes_less'), self.parse_takes_less, cb_kwargs=data) + yield Request(self.mockserver.url('/takes_more'), self.parse_takes_more, cb_kwargs=data) def parse_first(self, response, key, number): self.checks.append(key == 'value') @@ -66,6 +69,25 @@ class KeywordArgumentsSpider(MockServerSpider): self.checks.append(response.url.endswith('/no_kwargs')) self.crawler.stats.inc_value('boolean_checks') + def parse_default(self, response, key, number=None, default=99): + self.checks.append(response.url.endswith('/default')) + self.checks.append(key == 'value') + self.checks.append(number == 123) + self.checks.append(default == 99) + self.crawler.stats.inc_value('boolean_checks', 4) + + def parse_takes_less(self, response, key): + """ + Should raise + TypeError: parse_takes_less() got an unexpected keyword argument 'number' + """ + + def parse_takes_more(self, response, key, number, other): + """ + Should raise + TypeError: parse_takes_more() missing 1 required positional argument: 'other' + """ + class FollowAllSpider(MetaSpider): diff --git a/tests/test_crawl.py b/tests/test_crawl.py index 9a39b8cb4..2b3e56ee9 100644 --- a/tests/test_crawl.py +++ b/tests/test_crawl.py @@ -4,6 +4,7 @@ import logging from testfixtures import LogCapture from twisted.internet import defer from twisted.trial.unittest import TestCase +import six from scrapy.http import Request from scrapy.crawler import CrawlerRunner @@ -15,6 +16,8 @@ from tests.mockserver import MockServer class CrawlTestCase(TestCase): + maxDiff = None + def setUp(self): self.mockserver = MockServer() self.mockserver.__enter__() @@ -26,9 +29,25 @@ class CrawlTestCase(TestCase): @defer.inlineCallbacks def test_callback_kwargs(self): crawler = self.runner.create_crawler(KeywordArgumentsSpider) - yield crawler.crawl(mockserver=self.mockserver) + with LogCapture() as log: + yield crawler.crawl(mockserver=self.mockserver) self.assertTrue(all(crawler.spider.checks)) self.assertEqual(len(crawler.spider.checks), crawler.stats.get_value('boolean_checks')) + # check exceptions for argument mismatch + exceptions = {} + for line in log.records: + for key in ('takes_less', 'takes_more'): + if key in line.getMessage(): + exceptions[key] = line + self.assertEqual(exceptions['takes_less'].exc_info[0], TypeError) + self.assertEqual(str(exceptions['takes_less'].exc_info[1]), "parse_takes_less() got an unexpected keyword argument 'number'") + self.assertEqual(exceptions['takes_more'].exc_info[0], TypeError) + # py2 and py3 messages are different + exc_message = str(exceptions['takes_more'].exc_info[1]) + if six.PY2: + self.assertEqual(exc_message, "parse_takes_more() takes exactly 5 arguments (4 given)") + elif six.PY3: + self.assertEqual(exc_message, "parse_takes_more() missing 1 required positional argument: 'other'") @defer.inlineCallbacks def test_follow_all(self): From 3efe3bea1cbb5ae83c024fc6dc8e1776a47a345f Mon Sep 17 00:00:00 2001 From: Eugenio Lacuesta Date: Thu, 28 Mar 2019 14:16:03 -0300 Subject: [PATCH 327/889] Update docs about cb_kwargs and meta --- docs/topics/request-response.rst | 41 ++++++++++++++++++++------------ 1 file changed, 26 insertions(+), 15 deletions(-) diff --git a/docs/topics/request-response.rst b/docs/topics/request-response.rst index dd0db8156..05ca8d6c1 100644 --- a/docs/topics/request-response.rst +++ b/docs/topics/request-response.rst @@ -215,24 +215,12 @@ Example:: In some cases you may be interested in passing arguments to those callback functions so you can receive the arguments later, in the second callback. -The following two examples show how to achieve this by using the -:attr:`Request.meta` and :attr:`Request.cb_kwargs` attributes respectively:: - - def parse_page1(self, response): - item = MyItem() - item['main_url'] = response.url - request = scrapy.Request("http://www.example.com/some_page.html", - callback=self.parse_page2) - request.meta['item'] = item - yield request - - def parse_page2(self, response): - item = response.meta['item'] - item['other_url'] = response.url - yield item +The following example shows how to achieve this by using the +:attr:`Request.cb_kwargs` attribute: :: + # pass information to the next callback using the Request.cb_kwargs attribute def parse(self, response): request = scrapy.Request('http://www.example.com/index.html', callback=self.parse_page2, @@ -247,6 +235,29 @@ The following two examples show how to achieve this by using the foo=foo, ) +.. caution:: :attr:`Request.cb_kwargs` was introduced in version ``1.7``. + Prior to that, :attr:`Request.meta` was the recommended option for passing + information around callbacks. However, after ``1.7`` :attr:`Request.cb_kwargs` + became the preferred way of passing user information, leaving :attr:`Request.meta` + to be used by internal components like spider or downloader middlewares. + The following example, which uses :attr:`Request.meta`, is only kept for historical + reasons. + +:: + + # pass information to the next callback using the Request.meta attribute + def parse_page1(self, response): + item = MyItem() + item['main_url'] = response.url + request = scrapy.Request("http://www.example.com/some_page.html", + callback=self.parse_page2) + request.meta['item'] = item + yield request + + def parse_page2(self, response): + item = response.meta['item'] + item['other_url'] = response.url + yield item .. _topics-request-response-ref-errbacks: From e8af6331b5ff62d71ff80eddcc52b85c25482c0e Mon Sep 17 00:00:00 2001 From: Eugenio Lacuesta Date: Thu, 28 Mar 2019 14:56:31 -0300 Subject: [PATCH 328/889] Add cb_kwargs option to the parse command --- docs/topics/commands.rst | 3 +++ scrapy/commands/parse.py | 37 ++++++++++++++++++++++++------------- tests/test_command_parse.py | 14 ++++++++++++++ 3 files changed, 41 insertions(+), 13 deletions(-) diff --git a/docs/topics/commands.rst b/docs/topics/commands.rst index 97f8311de..6644d65e4 100644 --- a/docs/topics/commands.rst +++ b/docs/topics/commands.rst @@ -461,6 +461,9 @@ Supported options: * ``--meta`` or ``-m``: additional request meta that will be passed to the callback request. This must be a valid json string. Example: --meta='{"foo" : "bar"}' +* ``--cb_kwargs``: additional keyword arguments that will be passed to the callback. + This must be a valid json string. Example: --cb_kwargs='{"foo" : "bar"}' + * ``--pipelines``: process items through pipelines * ``--rules`` or ``-r``: use :class:`~scrapy.spiders.CrawlSpider` diff --git a/scrapy/commands/parse.py b/scrapy/commands/parse.py index 69418a478..2486f3f23 100644 --- a/scrapy/commands/parse.py +++ b/scrapy/commands/parse.py @@ -51,12 +51,13 @@ class Command(ScrapyCommand): help="use this callback for parsing, instead looking for a callback") parser.add_option("-m", "--meta", dest="meta", help="inject extra meta into the Request, it must be a valid raw json string") + parser.add_option("--cb_kwargs", dest="cb_kwargs", + help="inject extra cb_kwargs into the Request, it must be a valid raw json string") parser.add_option("-d", "--depth", dest="depth", type="int", default=1, help="maximum depth for parsing requests [default: %default]") parser.add_option("-v", "--verbose", dest="verbose", action="store_true", help="print each depth level one by one") - @property def max_level(self): levels = list(self.items.keys()) + list(self.requests.keys()) @@ -111,10 +112,11 @@ class Command(ScrapyCommand): if not opts.nolinks: self.print_requests(colour=colour) - def run_callback(self, response, cb): + def run_callback(self, response, callback, cb_kwargs=None): + cb_kwargs = cb_kwargs or {} items, requests = [], [] - for x in iterate_spider_output(cb(response)): + for x in iterate_spider_output(callback(response, **cb_kwargs)): if isinstance(x, (BaseItem, dict)): items.append(x) elif isinstance(x, Request): @@ -142,8 +144,7 @@ class Command(ScrapyCommand): else: self.spidercls = spidercls_for_request(spider_loader, Request(url)) if not self.spidercls: - logger.error('Unable to find spider for: %(url)s', - {'url': url}) + logger.error('Unable to find spider for: %(url)s', {'url': url}) # Request requires callback argument as callable or None, not string request = Request(url, None) @@ -160,7 +161,7 @@ class Command(ScrapyCommand): {'url': url}) def prepare_request(self, spider, request, opts): - def callback(response): + def callback(response, **cb_kwargs): # memorize first request if not self.first_response: self.first_response = response @@ -175,7 +176,7 @@ class Command(ScrapyCommand): if not cb: logger.error('Cannot find a rule that matches %(url)r in spider: %(spider)s', - {'url': response.url, 'spider': spider.name}) + {'url': response.url, 'spider': spider.name}) return else: cb = 'parse' @@ -192,7 +193,7 @@ class Command(ScrapyCommand): # parse items and requests depth = response.meta['_depth'] - items, requests = self.run_callback(response, cb) + items, requests = self.run_callback(response, cb, cb_kwargs) if opts.pipelines: itemproc = self.pcrawler.engine.scraper.itemproc for item in items: @@ -207,10 +208,14 @@ class Command(ScrapyCommand): req.callback = callback return requests - #update request meta if any extra meta was passed through the --meta/-m opts. + # update request meta if any extra meta was passed through the --meta/-m opts. if opts.meta: request.meta.update(opts.meta) + # update cb_kwargs if any extra cb_kwargs was passed through the --cb_kwargs option. + if opts.cb_kwargs: + request.cb_kwargs.update(opts.cb_kwargs) + request.meta['_depth'] = 1 request.meta['_callback'] = request.callback request.callback = callback @@ -221,23 +226,29 @@ class Command(ScrapyCommand): self.process_spider_arguments(opts) self.process_request_meta(opts) + self.process_request_cb_kwargs(opts) def process_spider_arguments(self, opts): - try: opts.spargs = arglist_to_dict(opts.spargs) except ValueError: raise UsageError("Invalid -a value, use -a NAME=VALUE", print_help=False) def process_request_meta(self, opts): - if opts.meta: try: opts.meta = json.loads(opts.meta) except ValueError: - raise UsageError("Invalid -m/--meta value, pass a valid json string to -m or --meta. " \ - "Example: --meta='{\"foo\" : \"bar\"}'", print_help=False) + raise UsageError("Invalid -m/--meta value, pass a valid json string to -m or --meta. " + "Example: --meta='{\"foo\" : \"bar\"}'", print_help=False) + def process_request_cb_kwargs(self, opts): + if opts.cb_kwargs: + try: + opts.cb_kwargs = json.loads(opts.cb_kwargs) + except ValueError: + raise UsageError("Invalid --cb_kwargs value, pass a valid json string to --cb_kwargs. " + "Example: --cb_kwargs='{\"foo\" : \"bar\"}'", print_help=False) def run(self, args, opts): # parse arguments diff --git a/tests/test_command_parse.py b/tests/test_command_parse.py index 02037b866..1404005fb 100644 --- a/tests/test_command_parse.py +++ b/tests/test_command_parse.py @@ -43,6 +43,12 @@ class MySpider(scrapy.Spider): else: self.logger.debug('It Works!') + def parse_request_with_cb_kwargs(self, response, foo=None, key=None): + if foo == 'bar' and key == 'value': + self.logger.debug('It Works!') + else: + self.logger.debug('It Does Not Work :(') + def parse_request_without_meta(self, response): foo = response.meta.get('foo', 'bar') @@ -120,6 +126,14 @@ ITEM_PIPELINES = {'%s.pipelines.MyPipeline': 1} self.url('/html')]) self.assertIn("DEBUG: It Works!", _textmode(stderr)) + @defer.inlineCallbacks + def test_request_with_cb_kwargs(self): + raw_json_string = '{"foo" : "bar", "key": "value"}' + _, _, stderr = yield self.execute(['--spider', self.spider_name, + '--cb_kwargs', raw_json_string, + '-c', 'parse_request_with_cb_kwargs', + self.url('/html')]) + self.assertIn("DEBUG: It Works!", _textmode(stderr)) @defer.inlineCallbacks def test_request_without_meta(self): From 8fb077694fcaa50a8625c8e2e8d0068add2b056d Mon Sep 17 00:00:00 2001 From: Eugenio Lacuesta Date: Thu, 28 Mar 2019 15:18:00 -0300 Subject: [PATCH 329/889] Request.cb_kwargs: Update docs --- docs/topics/debug.rst | 13 +++++-------- docs/topics/jobs.rst | 9 +++++---- docs/topics/leaks.rst | 14 ++++++++------ docs/topics/request-response.rst | 13 ++++++------- 4 files changed, 24 insertions(+), 25 deletions(-) diff --git a/docs/topics/debug.rst b/docs/topics/debug.rst index f93aa2c72..0aaad0c77 100644 --- a/docs/topics/debug.rst +++ b/docs/topics/debug.rst @@ -28,16 +28,15 @@ Consider the following scrapy spider below:: item = MyItem() # populate `item` fields # and extract item_details_url - yield scrapy.Request(item_details_url, self.parse_details, meta={'item': item}) + yield scrapy.Request(item_details_url, self.parse_details, cb_kwargs={'item': item}) - def parse_details(self, response): - item = response.meta['item'] + def parse_details(self, response, item): # populate more `item` fields return item Basically this is a simple spider which parses two pages of items (the start_urls). Items also have a details page with additional information, so we -use the ``meta`` functionality of :class:`~scrapy.http.Request` to pass a +use the ``cb_kwargs`` functionality of :class:`~scrapy.http.Request` to pass a partially populated item. @@ -100,8 +99,7 @@ Fortunately, the :command:`shell` is your bread and butter in this case (see from scrapy.shell import inspect_response - def parse_details(self, response): - item = response.meta.get('item', None) + def parse_details(self, response, item=None): if item: # populate more `item` fields return item @@ -134,8 +132,7 @@ Logging is another useful option for getting information about your spider run. Although not as convenient, it comes with the advantage that the logs will be available in all future runs should they be necessary again:: - def parse_details(self, response): - item = response.meta.get('item', None) + def parse_details(self, response, item=None): if item: # populate more `item` fields return item diff --git a/docs/topics/jobs.rst b/docs/topics/jobs.rst index 1a5d52487..9fd311c69 100644 --- a/docs/topics/jobs.rst +++ b/docs/topics/jobs.rst @@ -81,7 +81,8 @@ So, for example, this won't work:: def some_callback(self, response): somearg = 'test' - return scrapy.Request('http://www.example.com', callback=lambda r: self.other_callback(r, somearg)) + return scrapy.Request('http://www.example.com', + callback=lambda r: self.other_callback(r, somearg)) def other_callback(self, response, somearg): print("the argument passed is: %s" % somearg) @@ -90,10 +91,10 @@ But this will:: def some_callback(self, response): somearg = 'test' - return scrapy.Request('http://www.example.com', callback=self.other_callback, meta={'somearg': somearg}) + return scrapy.Request('http://www.example.com', + callback=self.other_callback, cb_kwargs={'somearg': somearg}) - def other_callback(self, response): - somearg = response.meta['somearg'] + def other_callback(self, response, somearg): print("the argument passed is: %s" % somearg) If you wish to log the requests that couldn't be serialized, you can set the diff --git a/docs/topics/leaks.rst b/docs/topics/leaks.rst index af14d14e8..8278e9849 100644 --- a/docs/topics/leaks.rst +++ b/docs/topics/leaks.rst @@ -27,10 +27,11 @@ Common causes of memory leaks It happens quite often (sometimes by accident, sometimes on purpose) that the Scrapy developer passes objects referenced in Requests (for example, using the -:attr:`~scrapy.http.Request.meta` attribute or the request callback function) -and that effectively bounds the lifetime of those referenced objects to the -lifetime of the Request. This is, by far, the most common cause of memory leaks -in Scrapy projects, and a quite difficult one to debug for newcomers. +:attr:`~scrapy.http.Request.cb_kwargs` or :attr:`~scrapy.http.Request.meta` +attributes or the request callback function) and that effectively bounds the +lifetime of those referenced objects to the lifetime of the Request. This is, +by far, the most common cause of memory leaks in Scrapy projects, and a quite +difficult one to debug for newcomers. In big projects, the spiders are typically written by different people and some of those spiders could be "leaking" and thus affecting the rest of the other @@ -48,7 +49,8 @@ Too Many Requests? By default Scrapy keeps the request queue in memory; it includes :class:`~scrapy.http.Request` objects and all objects -referenced in Request attributes (e.g. in :attr:`~scrapy.http.Request.meta`). +referenced in Request attributes (e.g. in :attr:`~scrapy.http.Request.cb_kwargs` +and :attr:`~scrapy.http.Request.meta`). While not necessarily a leak, this can take a lot of memory. Enabling :ref:`persistent job queue ` could help keeping memory usage in control. @@ -101,7 +103,7 @@ Let's see a concrete example of a hypothetical case of memory leaks. Suppose we have some spider with a line similar to this one:: return Request("http://www.somenastyspider.com/product.php?pid=%d" % product_id, - callback=self.parse, meta={referer: response}) + callback=self.parse, cb_kwargs={'referer': response}) That line is passing a response reference inside a request which effectively ties the response lifetime to the requests' one, and that would definitely diff --git a/docs/topics/request-response.rst b/docs/topics/request-response.rst index 05ca8d6c1..f299c2cff 100644 --- a/docs/topics/request-response.rst +++ b/docs/topics/request-response.rst @@ -186,12 +186,12 @@ Request objects Return a new Request which is a copy of this Request. See also: :ref:`topics-request-response-ref-request-callback-arguments`. - .. method:: Request.replace([url, method, headers, body, cookies, meta, encoding, dont_filter, callback, errback]) + .. method:: Request.replace([url, method, headers, body, cookies, meta, flags, encoding, priority, dont_filter, callback, errback, cb_kwargs]) Return a Request object with the same members, except for those members given new values by whichever keyword arguments are specified. The - attribute :attr:`Request.meta` is copied by default (unless a new value - is given in the ``meta`` argument). See also + :attr:`Request.cb_kwargs` and :attr:`Request.meta` attributes are copied by default + (unless new values are given as arguments). See also :ref:`topics-request-response-ref-request-callback-arguments`. .. _topics-request-response-ref-request-callback-arguments: @@ -237,11 +237,10 @@ The following example shows how to achieve this by using the .. caution:: :attr:`Request.cb_kwargs` was introduced in version ``1.7``. Prior to that, :attr:`Request.meta` was the recommended option for passing - information around callbacks. However, after ``1.7`` :attr:`Request.cb_kwargs` + information around callbacks. However, after ``1.7``, using :attr:`Request.cb_kwargs` became the preferred way of passing user information, leaving :attr:`Request.meta` - to be used by internal components like spider or downloader middlewares. - The following example, which uses :attr:`Request.meta`, is only kept for historical - reasons. + to be populated by internal components like spider or downloader middlewares. + The following :attr:`Request.meta` example is only kept for historical reasons. :: From 46b9ab0c58354deb1045c20f3bc061526d69f356 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Adri=C3=A1n=20Chaves?= Date: Fri, 29 Mar 2019 10:28:36 +0000 Subject: [PATCH 330/889] Update docs/topics/broad-crawls.rst Co-Authored-By: whalebot-helmsman --- docs/topics/broad-crawls.rst | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/docs/topics/broad-crawls.rst b/docs/topics/broad-crawls.rst index 64c8883b1..68a24a4d2 100644 --- a/docs/topics/broad-crawls.rst +++ b/docs/topics/broad-crawls.rst @@ -42,7 +42,7 @@ efficient broad crawl. Use proper :setting:`SCHEDULER_PRIORITY_QUEUE` ============================================== -Default scrapy's scheduler priority queue is ``'scrapy.pqueues.ScrapyPriorityQueue'``. +Scrapy’s default scheduler priority queue is ``'scrapy.pqueues.ScrapyPriorityQueue'``. It works best during single domain crawl. And it does not work well with crawling many different domains in parallel From e3df6be360a58f016e31d5bfa2e04cd2e5d1965b Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Adri=C3=A1n=20Chaves?= Date: Fri, 29 Mar 2019 10:28:52 +0000 Subject: [PATCH 331/889] Update docs/topics/broad-crawls.rst Co-Authored-By: whalebot-helmsman --- docs/topics/broad-crawls.rst | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/docs/topics/broad-crawls.rst b/docs/topics/broad-crawls.rst index 68a24a4d2..b149d7f4a 100644 --- a/docs/topics/broad-crawls.rst +++ b/docs/topics/broad-crawls.rst @@ -43,7 +43,7 @@ Use proper :setting:`SCHEDULER_PRIORITY_QUEUE` ============================================== Scrapy’s default scheduler priority queue is ``'scrapy.pqueues.ScrapyPriorityQueue'``. -It works best during single domain crawl. And it does not work well with crawling +It works best during single-domain crawl. It does not work well with crawling many different domains in parallel To apply recommended priority queue use:: From bd228f1d962c7f4759536d8cda278857de7d5234 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Adri=C3=A1n=20Chaves?= Date: Fri, 29 Mar 2019 10:29:04 +0000 Subject: [PATCH 332/889] Update docs/topics/broad-crawls.rst Co-Authored-By: whalebot-helmsman --- docs/topics/broad-crawls.rst | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/docs/topics/broad-crawls.rst b/docs/topics/broad-crawls.rst index b149d7f4a..a01f28248 100644 --- a/docs/topics/broad-crawls.rst +++ b/docs/topics/broad-crawls.rst @@ -46,7 +46,7 @@ Scrapy’s default scheduler priority queue is ``'scrapy.pqueues.ScrapyPriorityQ It works best during single-domain crawl. It does not work well with crawling many different domains in parallel -To apply recommended priority queue use:: +To apply the recommended priority queue use:: SCHEDULER_PRIORITY_QUEUE = 'scrapy.pqueues.DownloaderAwarePriorityQueue' From 1ee99e1f4240af6a7a72fe7c58b89d7bce1cd09e Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Adri=C3=A1n=20Chaves?= Date: Fri, 29 Mar 2019 10:29:15 +0000 Subject: [PATCH 333/889] Update docs/topics/settings.rst Co-Authored-By: whalebot-helmsman --- docs/topics/settings.rst | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/docs/topics/settings.rst b/docs/topics/settings.rst index ed94146f4..4a5439bfc 100644 --- a/docs/topics/settings.rst +++ b/docs/topics/settings.rst @@ -1157,7 +1157,7 @@ SCHEDULER_PRIORITY_QUEUE ------------------------ Default: ``'scrapy.pqueues.ScrapyPriorityQueue'`` -Type of priority queue used by scheduler. Another available type is +Type of priority queue used by the scheduler. Another available type is ``scrapy.pqueues.DownloaderAwarePriorityQueue``. ``scrapy.pqueues.DownloaderAwarePriorityQueue`` works better than ``scrapy.pqueues.ScrapyPriorityQueue`` when you crawl many different From 2b4bcfaf494073520e84bbf301d5141a2e19a3e6 Mon Sep 17 00:00:00 2001 From: Vostretsov Nikita Date: Fri, 29 Mar 2019 10:30:26 +0000 Subject: [PATCH 334/889] remove comment --- scrapy/core/scheduler.py | 1 - 1 file changed, 1 deletion(-) diff --git a/scrapy/core/scheduler.py b/scrapy/core/scheduler.py index c385fafe1..9d0258db2 100644 --- a/scrapy/core/scheduler.py +++ b/scrapy/core/scheduler.py @@ -57,7 +57,6 @@ class Scheduler(object): dupefilter = create_instance(dupefilter_cls, settings, crawler) pqclass = load_object(settings['SCHEDULER_PRIORITY_QUEUE']) if pqclass is PriorityQueue: - # backwards compatibility warnings.warn("SCHEDULER_PRIORITY_QUEUE='queuelib.PriorityQueue'" " is no longer supported because of API changes; " "please use 'scrapy.pqueues.ScrapyPriorityQueue'", From 554d8728227a9ea96e5ea3a8a4fd782d42fdbd66 Mon Sep 17 00:00:00 2001 From: Vostretsov Nikita Date: Fri, 29 Mar 2019 10:31:15 +0000 Subject: [PATCH 335/889] remove spacing --- scrapy/core/scheduler.py | 5 ----- 1 file changed, 5 deletions(-) diff --git a/scrapy/core/scheduler.py b/scrapy/core/scheduler.py index 9d0258db2..d87d2ffdc 100644 --- a/scrapy/core/scheduler.py +++ b/scrapy/core/scheduler.py @@ -77,13 +77,8 @@ class Scheduler(object): def open(self, spider): self.spider = spider - - # in-memory PriorityQueue instance self.mqs = self._mq() - - # on-disk PriorityQueue instance self.dqs = self._dq() if self.dqdir else None - return self.df.open() def close(self, reason): From f08f841d0bebd097358889c0c98f83f051828f15 Mon Sep 17 00:00:00 2001 From: Vostretsov Nikita Date: Fri, 29 Mar 2019 10:35:49 +0000 Subject: [PATCH 336/889] remove small single use method --- scrapy/core/scheduler.py | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-) diff --git a/scrapy/core/scheduler.py b/scrapy/core/scheduler.py index d87d2ffdc..975aede0c 100644 --- a/scrapy/core/scheduler.py +++ b/scrapy/core/scheduler.py @@ -101,7 +101,7 @@ class Scheduler(object): return True def next_request(self): - request = self._mqpop() + request = self.mqs.pop() if request: self.stats.inc_value('scheduler/dequeued/memory', spider=self.spider) else: @@ -141,9 +141,6 @@ class Scheduler(object): if self.dqs: return self.dqs.pop() - def _mqpop(self): - return self.mqs.pop() - def _newmq(self, priority): """ Factory for creating memory queues. """ return self.mqclass() From ef743983a98ae0891abf9aca4c9b19cb44861c49 Mon Sep 17 00:00:00 2001 From: Vostretsov Nikita Date: Fri, 29 Mar 2019 10:38:13 +0000 Subject: [PATCH 337/889] change wording --- docs/topics/broad-crawls.rst | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/docs/topics/broad-crawls.rst b/docs/topics/broad-crawls.rst index a01f28248..6e50c0bc7 100644 --- a/docs/topics/broad-crawls.rst +++ b/docs/topics/broad-crawls.rst @@ -39,7 +39,7 @@ you need to keep in mind when using Scrapy for doing broad crawls, along with concrete suggestions of Scrapy settings to tune in order to achieve an efficient broad crawl. -Use proper :setting:`SCHEDULER_PRIORITY_QUEUE` +Use the right :setting:`SCHEDULER_PRIORITY_QUEUE` ============================================== Scrapy’s default scheduler priority queue is ``'scrapy.pqueues.ScrapyPriorityQueue'``. @@ -96,7 +96,7 @@ When doing broad crawls you are often only interested in the crawl rates you get and any errors found. These stats are reported by Scrapy when using the ``INFO`` log level. In order to save CPU (and log storage requirements) you should not use ``DEBUG`` log level when preforming large broad crawls in -production. Using ``DEBUG`` level when developing your (broad) crawler may be +production. Using ``DEBUG`` level when developing your (broad) crawler may be fine though. To set the log level use:: From 1c6733454e14a3c237ed602b65ae5e0a8a78dee5 Mon Sep 17 00:00:00 2001 From: Vostretsov Nikita Date: Fri, 29 Mar 2019 10:44:55 +0000 Subject: [PATCH 338/889] added underlines --- docs/topics/broad-crawls.rst | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/docs/topics/broad-crawls.rst b/docs/topics/broad-crawls.rst index 6e50c0bc7..b887b98af 100644 --- a/docs/topics/broad-crawls.rst +++ b/docs/topics/broad-crawls.rst @@ -40,7 +40,7 @@ concrete suggestions of Scrapy settings to tune in order to achieve an efficient broad crawl. Use the right :setting:`SCHEDULER_PRIORITY_QUEUE` -============================================== +================================================= Scrapy’s default scheduler priority queue is ``'scrapy.pqueues.ScrapyPriorityQueue'``. It works best during single-domain crawl. It does not work well with crawling From f5e0b6b89ace437af850e0225651329101a59862 Mon Sep 17 00:00:00 2001 From: Eugenio Lacuesta Date: Fri, 29 Mar 2019 14:03:26 -0300 Subject: [PATCH 339/889] parse command: rename cb_kwargs option to cbkwargs --- scrapy/commands/parse.py | 18 +++++++++--------- tests/test_command_parse.py | 2 +- 2 files changed, 10 insertions(+), 10 deletions(-) diff --git a/scrapy/commands/parse.py b/scrapy/commands/parse.py index 2486f3f23..e948d6406 100644 --- a/scrapy/commands/parse.py +++ b/scrapy/commands/parse.py @@ -51,8 +51,8 @@ class Command(ScrapyCommand): help="use this callback for parsing, instead looking for a callback") parser.add_option("-m", "--meta", dest="meta", help="inject extra meta into the Request, it must be a valid raw json string") - parser.add_option("--cb_kwargs", dest="cb_kwargs", - help="inject extra cb_kwargs into the Request, it must be a valid raw json string") + parser.add_option("--cbkwargs", dest="cbkwargs", + help="inject extra cbkwargs into the Request, it must be a valid raw json string") parser.add_option("-d", "--depth", dest="depth", type="int", default=1, help="maximum depth for parsing requests [default: %default]") parser.add_option("-v", "--verbose", dest="verbose", action="store_true", @@ -212,9 +212,9 @@ class Command(ScrapyCommand): if opts.meta: request.meta.update(opts.meta) - # update cb_kwargs if any extra cb_kwargs was passed through the --cb_kwargs option. - if opts.cb_kwargs: - request.cb_kwargs.update(opts.cb_kwargs) + # update cb_kwargs if any extra values were was passed through the --cbkwargs option. + if opts.cbkwargs: + request.cb_kwargs.update(opts.cbkwargs) request.meta['_depth'] = 1 request.meta['_callback'] = request.callback @@ -243,12 +243,12 @@ class Command(ScrapyCommand): "Example: --meta='{\"foo\" : \"bar\"}'", print_help=False) def process_request_cb_kwargs(self, opts): - if opts.cb_kwargs: + if opts.cbkwargs: try: - opts.cb_kwargs = json.loads(opts.cb_kwargs) + opts.cbkwargs = json.loads(opts.cbkwargs) except ValueError: - raise UsageError("Invalid --cb_kwargs value, pass a valid json string to --cb_kwargs. " - "Example: --cb_kwargs='{\"foo\" : \"bar\"}'", print_help=False) + raise UsageError("Invalid --cbkwargs value, pass a valid json string to --cbkwargs. " + "Example: --cbkwargs='{\"foo\" : \"bar\"}'", print_help=False) def run(self, args, opts): # parse arguments diff --git a/tests/test_command_parse.py b/tests/test_command_parse.py index 1404005fb..c18a6ce9f 100644 --- a/tests/test_command_parse.py +++ b/tests/test_command_parse.py @@ -130,7 +130,7 @@ ITEM_PIPELINES = {'%s.pipelines.MyPipeline': 1} def test_request_with_cb_kwargs(self): raw_json_string = '{"foo" : "bar", "key": "value"}' _, _, stderr = yield self.execute(['--spider', self.spider_name, - '--cb_kwargs', raw_json_string, + '--cbkwargs', raw_json_string, '-c', 'parse_request_with_cb_kwargs', self.url('/html')]) self.assertIn("DEBUG: It Works!", _textmode(stderr)) From ccb56a317ee249978496e918ee5b74d83c2d7199 Mon Sep 17 00:00:00 2001 From: Eugenio Lacuesta Date: Fri, 29 Mar 2019 14:12:26 -0300 Subject: [PATCH 340/889] Update docs about cb_kwargs and meta --- docs/topics/request-response.rst | 30 ++++++------------------------ 1 file changed, 6 insertions(+), 24 deletions(-) diff --git a/docs/topics/request-response.rst b/docs/topics/request-response.rst index f299c2cff..4e81ce878 100644 --- a/docs/topics/request-response.rst +++ b/docs/topics/request-response.rst @@ -190,8 +190,8 @@ Request objects Return a Request object with the same members, except for those members given new values by whichever keyword arguments are specified. The - :attr:`Request.cb_kwargs` and :attr:`Request.meta` attributes are copied by default - (unless new values are given as arguments). See also + :attr:`Request.cb_kwargs` and :attr:`Request.meta` attributes are shallow + copied by default (unless new values are given as arguments). See also :ref:`topics-request-response-ref-request-callback-arguments`. .. _topics-request-response-ref-request-callback-arguments: @@ -220,7 +220,6 @@ The following example shows how to achieve this by using the :: - # pass information to the next callback using the Request.cb_kwargs attribute def parse(self, response): request = scrapy.Request('http://www.example.com/index.html', callback=self.parse_page2, @@ -236,27 +235,10 @@ The following example shows how to achieve this by using the ) .. caution:: :attr:`Request.cb_kwargs` was introduced in version ``1.7``. - Prior to that, :attr:`Request.meta` was the recommended option for passing - information around callbacks. However, after ``1.7``, using :attr:`Request.cb_kwargs` - became the preferred way of passing user information, leaving :attr:`Request.meta` - to be populated by internal components like spider or downloader middlewares. - The following :attr:`Request.meta` example is only kept for historical reasons. - -:: - - # pass information to the next callback using the Request.meta attribute - def parse_page1(self, response): - item = MyItem() - item['main_url'] = response.url - request = scrapy.Request("http://www.example.com/some_page.html", - callback=self.parse_page2) - request.meta['item'] = item - yield request - - def parse_page2(self, response): - item = response.meta['item'] - item['other_url'] = response.url - yield item + Prior to that, using :attr:`Request.meta` was recommended for passing + information around callbacks. After ``1.7``, :attr:`Request.cb_kwargs` + became the preferred way for handling user information, leaving :attr:`Request.meta` + for communication with components like middlewares and extensions. .. _topics-request-response-ref-errbacks: From 294ef51bb24782a0527892ea93bb4876daa7ca50 Mon Sep 17 00:00:00 2001 From: Eugenio Lacuesta Date: Fri, 29 Mar 2019 16:12:55 -0300 Subject: [PATCH 341/889] parse command: update docs about passing callback keyword arguments --- docs/topics/commands.rst | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/docs/topics/commands.rst b/docs/topics/commands.rst index 6644d65e4..a93bee06b 100644 --- a/docs/topics/commands.rst +++ b/docs/topics/commands.rst @@ -461,8 +461,8 @@ Supported options: * ``--meta`` or ``-m``: additional request meta that will be passed to the callback request. This must be a valid json string. Example: --meta='{"foo" : "bar"}' -* ``--cb_kwargs``: additional keyword arguments that will be passed to the callback. - This must be a valid json string. Example: --cb_kwargs='{"foo" : "bar"}' +* ``--cbkwargs``: additional keyword arguments that will be passed to the callback. + This must be a valid json string. Example: --cbkwargs='{"foo" : "bar"}' * ``--pipelines``: process items through pipelines From 0522fe35c334141e90741644fec368cdbd12044e Mon Sep 17 00:00:00 2001 From: Eugenio Lacuesta Date: Fri, 29 Mar 2019 16:15:34 -0300 Subject: [PATCH 342/889] parse command: improve option description --- scrapy/commands/parse.py | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/scrapy/commands/parse.py b/scrapy/commands/parse.py index e948d6406..d4f2234b0 100644 --- a/scrapy/commands/parse.py +++ b/scrapy/commands/parse.py @@ -52,7 +52,7 @@ class Command(ScrapyCommand): parser.add_option("-m", "--meta", dest="meta", help="inject extra meta into the Request, it must be a valid raw json string") parser.add_option("--cbkwargs", dest="cbkwargs", - help="inject extra cbkwargs into the Request, it must be a valid raw json string") + help="inject extra callback kwargs into the Request, it must be a valid raw json string") parser.add_option("-d", "--depth", dest="depth", type="int", default=1, help="maximum depth for parsing requests [default: %default]") parser.add_option("-v", "--verbose", dest="verbose", action="store_true", From 07ff9248a5fd2eac4f53da92766dcb5a7ca48569 Mon Sep 17 00:00:00 2001 From: Eugenio Lacuesta Date: Mon, 1 Apr 2019 12:31:26 -0300 Subject: [PATCH 343/889] [Docs] CrawlSpider: add note about link text --- docs/topics/spiders.rst | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/docs/topics/spiders.rst b/docs/topics/spiders.rst index 8c4049f85..5417ef129 100644 --- a/docs/topics/spiders.rst +++ b/docs/topics/spiders.rst @@ -377,7 +377,10 @@ Crawling rules .. class:: Rule(link_extractor, callback=None, cb_kwargs=None, follow=None, process_links=None, process_request=None) ``link_extractor`` is a :ref:`Link Extractor ` object which - defines how links will be extracted from each crawled page. + defines how links will be extracted from each crawled page. Each produced link will + be used to generate a :class:`~scrapy.http.Request` object, which will contain the + link's text in its ``meta`` attribute. + The link text can be accessed from the callback method though ``response.meta['link_text']`` ``callback`` is a callable or a string (in which case a method from the spider object with that name will be used) to be called for each link extracted with @@ -438,6 +441,7 @@ Let's now take a look at an example CrawlSpider with rules:: item['id'] = response.xpath('//td[@id="item_id"]/text()').re(r'ID: (\d+)') item['name'] = response.xpath('//td[@id="item_name"]/text()').get() item['description'] = response.xpath('//td[@id="item_description"]/text()').get() + item['link_text'] = response.meta['link_text'] return item From 8ebbc731b2bdf8e2a2b5a2f0673da838369f31b5 Mon Sep 17 00:00:00 2001 From: Eugenio Lacuesta Date: Mon, 1 Apr 2019 16:15:03 -0300 Subject: [PATCH 344/889] [Docs] Rephrase Rule docs --- docs/topics/spiders.rst | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/docs/topics/spiders.rst b/docs/topics/spiders.rst index 5417ef129..7290bb844 100644 --- a/docs/topics/spiders.rst +++ b/docs/topics/spiders.rst @@ -380,13 +380,13 @@ Crawling rules defines how links will be extracted from each crawled page. Each produced link will be used to generate a :class:`~scrapy.http.Request` object, which will contain the link's text in its ``meta`` attribute. - The link text can be accessed from the callback method though ``response.meta['link_text']`` ``callback`` is a callable or a string (in which case a method from the spider object with that name will be used) to be called for each link extracted with - the specified link_extractor. This callback receives a response as its first - argument and must return a list containing :class:`~scrapy.item.Item` and/or - :class:`~scrapy.http.Request` objects (or any subclass of them). + the specified link extractor. This callback receives a :class:`~scrapy.http.Response` + as its first argument and must return either a single instance or an iterable of + :class:`~scrapy.item.Item`, ``dict`` and/or :class:`~scrapy.http.Request` objects + (or any subclass of them). .. warning:: When writing crawl spider rules, avoid using ``parse`` as callback, since the :class:`CrawlSpider` uses the ``parse`` method From 7a38623cecc6c60d7ffe14c75d1fe679bb04b774 Mon Sep 17 00:00:00 2001 From: Eugenio Lacuesta Date: Mon, 1 Apr 2019 17:09:49 -0300 Subject: [PATCH 345/889] [Docs] Clarify comment about meta dictionary --- docs/topics/spiders.rst | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/docs/topics/spiders.rst b/docs/topics/spiders.rst index 7290bb844..3cd051cdf 100644 --- a/docs/topics/spiders.rst +++ b/docs/topics/spiders.rst @@ -379,7 +379,7 @@ Crawling rules ``link_extractor`` is a :ref:`Link Extractor ` object which defines how links will be extracted from each crawled page. Each produced link will be used to generate a :class:`~scrapy.http.Request` object, which will contain the - link's text in its ``meta`` attribute. + link's text in its ``meta`` dictionary (under the ``link_text`` key). ``callback`` is a callable or a string (in which case a method from the spider object with that name will be used) to be called for each link extracted with From 7acf4eec792f155a8b0e92c3bb1efa1ff5882ac8 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Adri=C3=A1n=20Chaves?= Date: Tue, 2 Apr 2019 18:36:03 +0200 Subject: [PATCH 346/889] Deprecate the scrapy.utils.gz.is_gzipped function --- scrapy/utils/gz.py | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/scrapy/utils/gz.py b/scrapy/utils/gz.py index ec3949651..b3fb16b1e 100644 --- a/scrapy/utils/gz.py +++ b/scrapy/utils/gz.py @@ -9,6 +9,9 @@ from gzip import GzipFile import six import re +from scrapy.utils.decorators import deprecated + + # - Python>=3.5 GzipFile's read() has issues returning leftover # uncompressed data when input is corrupted # (regression or bug-fix compared to Python 3.4) @@ -53,6 +56,7 @@ def gunzip(data): _is_gzipped = re.compile(br'^application/(x-)?gzip\b', re.I).search _is_octetstream = re.compile(br'^(application|binary)/octet-stream\b', re.I).search +@deprecated def is_gzipped(response): """Return True if the response is gzipped, or False otherwise""" ctype = response.headers.get('Content-Type', b'') From 6336e1d1f31da8611a0b63dcb536529e9027d51b Mon Sep 17 00:00:00 2001 From: float13 <43447704+float13@users.noreply.github.com> Date: Fri, 5 Apr 2019 00:54:46 -0400 Subject: [PATCH 347/889] grammar fix - delete unneeded apostrophe in "lets" --- docs/intro/tutorial.rst | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/docs/intro/tutorial.rst b/docs/intro/tutorial.rst index 41e61542a..b2f952fe2 100644 --- a/docs/intro/tutorial.rst +++ b/docs/intro/tutorial.rst @@ -511,7 +511,7 @@ We can try extracting it in the shell:: 'Next ' This gets the anchor element, but we want the attribute ``href``. For that, -Scrapy supports a CSS extension that let's you select the attribute contents, +Scrapy supports a CSS extension that lets you select the attribute contents, like this:: >>> response.css('li.next a::attr(href)').get() From d711ecfc18a01084f74bb2b9dc01c8bcb4772580 Mon Sep 17 00:00:00 2001 From: float13 <43447704+float13@users.noreply.github.com> Date: Fri, 5 Apr 2019 00:56:51 -0400 Subject: [PATCH 348/889] grammar fix - delete extra word "shell" --- docs/intro/tutorial.rst | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/docs/intro/tutorial.rst b/docs/intro/tutorial.rst index b2f952fe2..fc10adbe1 100644 --- a/docs/intro/tutorial.rst +++ b/docs/intro/tutorial.rst @@ -205,7 +205,7 @@ Extracting data --------------- The best way to learn how to extract data with Scrapy is trying selectors -using the shell :ref:`Scrapy shell `. Run:: +using the :ref:`Scrapy shell `. Run:: scrapy shell 'http://quotes.toscrape.com/page/1/' From 77e3695686d9a46841778248f4c1a2da336b54f7 Mon Sep 17 00:00:00 2001 From: float13 <43447704+float13@users.noreply.github.com> Date: Fri, 5 Apr 2019 01:04:59 -0400 Subject: [PATCH 349/889] grammar fix - add apostrophe-s to browser --- docs/intro/tutorial.rst | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/docs/intro/tutorial.rst b/docs/intro/tutorial.rst index fc10adbe1..a97f96801 100644 --- a/docs/intro/tutorial.rst +++ b/docs/intro/tutorial.rst @@ -296,7 +296,7 @@ expressions`_:: In order to find the proper CSS selectors to use, you might find useful opening the response page from the shell in your web browser using ``view(response)``. -You can use your browser developer tools to inspect the HTML and come up +You can use your browser's developer tools to inspect the HTML and come up with a selector (see section about :ref:`topics-developer-tools`). `Selector Gadget`_ is also a nice tool to quickly find CSS selector for From a101d5fe5c215bfbb09732fb506d4cd016624d80 Mon Sep 17 00:00:00 2001 From: float13 <43447704+float13@users.noreply.github.com> Date: Fri, 5 Apr 2019 01:12:20 -0400 Subject: [PATCH 350/889] text edit - delete 2 extra words --- docs/intro/tutorial.rst | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/docs/intro/tutorial.rst b/docs/intro/tutorial.rst index a97f96801..8bd2d27dd 100644 --- a/docs/intro/tutorial.rst +++ b/docs/intro/tutorial.rst @@ -297,7 +297,7 @@ expressions`_:: In order to find the proper CSS selectors to use, you might find useful opening the response page from the shell in your web browser using ``view(response)``. You can use your browser's developer tools to inspect the HTML and come up -with a selector (see section about :ref:`topics-developer-tools`). +with a selector (see :ref:`topics-developer-tools`). `Selector Gadget`_ is also a nice tool to quickly find CSS selector for visually selected elements, which works in many browsers. From 3a493b60661760b26ebc9dd2f4c5c7e4b8df93c9 Mon Sep 17 00:00:00 2001 From: Kostis Anagnostopoulos Date: Fri, 5 Apr 2019 11:52:00 +0200 Subject: [PATCH 351/889] fix: do not catch system exceptions like KeyboardInterrupt --- scrapy/contracts/__init__.py | 2 +- scrapy/core/spidermw.py | 2 +- scrapy/utils/defer.py | 4 ++-- scrapy/utils/misc.py | 2 +- tests/mockserver.py | 2 +- 5 files changed, 6 insertions(+), 6 deletions(-) diff --git a/scrapy/contracts/__init__.py b/scrapy/contracts/__init__.py index 259220a72..536bbdafb 100644 --- a/scrapy/contracts/__init__.py +++ b/scrapy/contracts/__init__.py @@ -94,7 +94,7 @@ class ContractsManager(object): try: output = cb(response) output = list(iterate_spider_output(output)) - except: + except Exception: case = _create_testcase(method, 'callback') results.addError(case, sys.exc_info()) diff --git a/scrapy/core/spidermw.py b/scrapy/core/spidermw.py index e07f76bdf..b5f9837ff 100644 --- a/scrapy/core/spidermw.py +++ b/scrapy/core/spidermw.py @@ -49,7 +49,7 @@ class SpiderMiddlewareManager(MiddlewareManager): .format(fname(method), type(result))) except _InvalidOutput: raise - except: + except Exception: return scrape_func(Failure(), request, spider) return scrape_func(response, request, spider) diff --git a/scrapy/utils/defer.py b/scrapy/utils/defer.py index bcf209511..69d621830 100644 --- a/scrapy/utils/defer.py +++ b/scrapy/utils/defer.py @@ -48,7 +48,7 @@ def mustbe_deferred(f, *args, **kw): # exception in Scrapy - see #125 except IgnoreRequest as e: return defer_fail(failure.Failure(e)) - except: + except Exception: return defer_fail(failure.Failure()) else: return defer_result(result) @@ -102,5 +102,5 @@ def iter_errback(iterable, errback, *a, **kw): yield next(it) except StopIteration: break - except: + except Exception: errback(failure.Failure(), *a, **kw) diff --git a/scrapy/utils/misc.py b/scrapy/utils/misc.py index 6de36d45c..ddaa7f7bf 100644 --- a/scrapy/utils/misc.py +++ b/scrapy/utils/misc.py @@ -86,7 +86,7 @@ def extract_regex(regex, text, encoding='utf-8'): try: strings = [regex.search(text).group('extract')] # named group - except: + except Exception: strings = regex.findall(text) # full regex or numbered groups strings = flatten(strings) diff --git a/tests/mockserver.py b/tests/mockserver.py index bf62fe907..3fa4bc0f0 100644 --- a/tests/mockserver.py +++ b/tests/mockserver.py @@ -177,7 +177,7 @@ class Root(Resource): try: from tests import tests_datadir self.putChild(b"files", File(os.path.join(tests_datadir, 'test_site/files/'))) - except: + except Exception: pass self.putChild(b"redirect-to", RedirectTo()) From 35ce92a4199b29a30e58026880b45002a1e4591e Mon Sep 17 00:00:00 2001 From: Victor Torres Date: Fri, 5 Apr 2019 11:43:21 -0300 Subject: [PATCH 352/889] fix typo (Response -> Request) check docs for more information https://github.com/scrapy/scrapy/blob/b5c552d17ff9e9629434712c3d0595c02853bcfc/docs/topics/spider-middleware.rst --- scrapy/templates/project/module/middlewares.py.tmpl | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/scrapy/templates/project/module/middlewares.py.tmpl b/scrapy/templates/project/module/middlewares.py.tmpl index 5debe1cd2..97b5db2e1 100644 --- a/scrapy/templates/project/module/middlewares.py.tmpl +++ b/scrapy/templates/project/module/middlewares.py.tmpl @@ -39,7 +39,7 @@ class ${ProjectName}SpiderMiddleware(object): # Called when a spider or process_spider_input() method # (from other spider middleware) raises an exception. - # Should return either None or an iterable of Response, dict + # Should return either None or an iterable of Request, dict # or Item objects. pass From a8f83ab9675ec4f0bcb90b2eb3f06c593f32732f Mon Sep 17 00:00:00 2001 From: Kostis Anagnostopoulos Date: Sat, 6 Apr 2019 14:58:32 +0200 Subject: [PATCH 353/889] doc: document LOGSTATS_INTERVAL setting --- docs/topics/settings.rst | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/docs/topics/settings.rst b/docs/topics/settings.rst index 062c4b2ca..145dcc136 100644 --- a/docs/topics/settings.rst +++ b/docs/topics/settings.rst @@ -897,6 +897,16 @@ Default: ``False`` If ``True``, the logs will just contain the root path. If it is set to ``False`` then it displays the component responsible for the log output +.. setting:: LOGSTATS_INTERVAL + +LOGSTATS_INTERVAL +----------------- + +Default: ``60.0`` + +The interval (in seconds) between each logging printout of the stats +by :class:`~extensions.logstats.LogStats`. + .. setting:: MEMDEBUG_ENABLED MEMDEBUG_ENABLED From aa46e1995cd5cb1099aba17535372b538bd656b3 Mon Sep 17 00:00:00 2001 From: Maram Sumanth Date: Sun, 7 Apr 2019 00:33:40 +0530 Subject: [PATCH 354/889] [MRG+1] Show elapsed time in statscollector (#3638) * Update corestats.py * Update corestats.py * corrected tests * Update corestats.py * Update scrapy/extensions/corestats.py --- scrapy/extensions/corestats.py | 6 +++++- tests/test_closespider.py | 6 +----- 2 files changed, 6 insertions(+), 6 deletions(-) diff --git a/scrapy/extensions/corestats.py b/scrapy/extensions/corestats.py index 3d9a307b7..8cc5e18ac 100644 --- a/scrapy/extensions/corestats.py +++ b/scrapy/extensions/corestats.py @@ -24,7 +24,11 @@ class CoreStats(object): self.stats.set_value('start_time', datetime.datetime.utcnow(), spider=spider) def spider_closed(self, spider, reason): - self.stats.set_value('finish_time', datetime.datetime.utcnow(), spider=spider) + finish_time = datetime.datetime.utcnow() + elapsed_time = finish_time - self.stats.get_value('start_time') + elapsed_time_seconds = elapsed_time.total_seconds() + self.stats.set_value('elapsed_time_seconds', elapsed_time_seconds, spider=spider) + self.stats.set_value('finish_time', finish_time, spider=spider) self.stats.set_value('finish_reason', reason, spider=spider) def item_scraped(self, item, spider): diff --git a/tests/test_closespider.py b/tests/test_closespider.py index 0eb1b7944..4a56425b7 100644 --- a/tests/test_closespider.py +++ b/tests/test_closespider.py @@ -53,9 +53,5 @@ class TestCloseSpider(TestCase): yield crawler.crawl(total=1000000, mockserver=self.mockserver) reason = crawler.spider.meta['close_reason'] self.assertEqual(reason, 'closespider_timeout') - stats = crawler.stats - start = stats.get_value('start_time') - stop = stats.get_value('finish_time') - diff = stop - start - total_seconds = diff.seconds + diff.microseconds + total_seconds = crawler.stats.get_value('elapsed_time_seconds') self.assertTrue(total_seconds >= close_on) From e6048d55f905ca0be2b32f9b566d257f34752c71 Mon Sep 17 00:00:00 2001 From: Anubhav Patel Date: Tue, 9 Apr 2019 17:34:20 +0530 Subject: [PATCH 355/889] changes parameter name --- scrapy/extensions/httpcache.py | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/scrapy/extensions/httpcache.py b/scrapy/extensions/httpcache.py index 1b5e05b1b..35c77add8 100644 --- a/scrapy/extensions/httpcache.py +++ b/scrapy/extensions/httpcache.py @@ -31,7 +31,7 @@ class DummyPolicy(object): def should_cache_response(self, response, request): return response.status not in self.ignore_http_codes - def is_cached_response_fresh(self, response, request): + def is_cached_response_fresh(self, cachedresponse, request): return True def is_cached_response_valid(self, cachedresponse, response, request): From 4cfdc14974313f23d7bb8be9311195f9cfa74968 Mon Sep 17 00:00:00 2001 From: Anubhav Patel Date: Tue, 9 Apr 2019 17:52:02 +0530 Subject: [PATCH 356/889] fixes a link in comment --- scrapy/extensions/httpcache.py | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/scrapy/extensions/httpcache.py b/scrapy/extensions/httpcache.py index 1b5e05b1b..03bba1530 100644 --- a/scrapy/extensions/httpcache.py +++ b/scrapy/extensions/httpcache.py @@ -70,7 +70,7 @@ class RFC2616Policy(object): return True def should_cache_response(self, response, request): - # What is cacheable - https://www.w3.org/Protocols/rfc2616/rfc2616-sec13.html#sec14.9.1 + # What is cacheable - https://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.9.1 # Response cacheability - https://www.w3.org/Protocols/rfc2616/rfc2616-sec13.html#sec13.4 # Status code 206 is not included because cache can not deal with partial contents cc = self._parse_cachecontrol(response) From d27c2c68ba4f201c18255a6ec8a735f140b13773 Mon Sep 17 00:00:00 2001 From: Matthijs Vos Date: Wed, 10 Apr 2019 12:56:50 +0200 Subject: [PATCH 357/889] Wrap scrapy check in environment --- scrapy/commands/check.py | 21 +++++++++++---------- scrapy/utils/misc.py | 27 +++++++++++++++++++++++---- 2 files changed, 34 insertions(+), 14 deletions(-) diff --git a/scrapy/commands/check.py b/scrapy/commands/check.py index b8a9ef989..b29587fa7 100644 --- a/scrapy/commands/check.py +++ b/scrapy/commands/check.py @@ -6,7 +6,7 @@ from unittest import TextTestRunner, TextTestResult as _TextTestResult from scrapy.commands import ScrapyCommand from scrapy.contracts import ContractsManager -from scrapy.utils.misc import load_object +from scrapy.utils.misc import load_object, set_environ from scrapy.utils.conf import build_component_list @@ -68,16 +68,17 @@ class Command(ScrapyCommand): spider_loader = self.crawler_process.spider_loader - for spidername in args or spider_loader.list(): - spidercls = spider_loader.load(spidername) - spidercls.start_requests = lambda s: conman.from_spider(s, result) + with set_environ(SCRAPY_CHECK=True): + for spidername in args or spider_loader.list(): + spidercls = spider_loader.load(spidername) + spidercls.start_requests = lambda s: conman.from_spider(s, result) - tested_methods = conman.tested_methods_from_spidercls(spidercls) - if opts.list: - for method in tested_methods: - contract_reqs[spidercls.name].append(method) - elif tested_methods: - self.crawler_process.crawl(spidercls) + tested_methods = conman.tested_methods_from_spidercls(spidercls) + if opts.list: + for method in tested_methods: + contract_reqs[spidercls.name].append(method) + elif tested_methods: + self.crawler_process.crawl(spidercls) # start checks if opts.list: diff --git a/scrapy/utils/misc.py b/scrapy/utils/misc.py index ddaa7f7bf..7a2cd18ea 100644 --- a/scrapy/utils/misc.py +++ b/scrapy/utils/misc.py @@ -1,6 +1,8 @@ """Helper functions which don't fit anywhere else""" +import os import re import hashlib +from contextlib import contextmanager from importlib import import_module from pkgutil import iter_modules @@ -10,7 +12,6 @@ from w3lib.html import replace_entities from scrapy.utils.python import flatten, to_unicode from scrapy.item import BaseItem - _ITERABLE_SINGLE_VALUES = dict, BaseItem, six.text_type, bytes @@ -40,7 +41,7 @@ def load_object(path): except ValueError: raise ValueError("Error loading object '%s': not a full path" % path) - module, name = path[:dot], path[dot+1:] + module, name = path[:dot], path[dot + 1:] mod = import_module(module) try: @@ -85,9 +86,9 @@ def extract_regex(regex, text, encoding='utf-8'): regex = re.compile(regex, re.UNICODE) try: - strings = [regex.search(text).group('extract')] # named group + strings = [regex.search(text).group('extract')] # named group except Exception: - strings = regex.findall(text) # full regex or numbered groups + strings = regex.findall(text) # full regex or numbered groups strings = flatten(strings) if isinstance(text, six.text_type): @@ -142,3 +143,21 @@ def create_instance(objcls, settings, crawler, *args, **kwargs): return objcls.from_settings(settings, *args, **kwargs) else: return objcls(*args, **kwargs) + + +@contextmanager +def set_environ(**kwargs): + """Temporarily set environment variables inside the context manager and + fully restore previous environment afterwards + """ + + original_env = {k: os.environ.get(k) for k in kwargs} + os.environ.update(kwargs) + try: + yield + finally: + for k, v in original_env: + if v is None: + del os.environ[k] + else: + os.environ[k] = v From 50730ed2280dec6384986d34999cd277d7568ff9 Mon Sep 17 00:00:00 2001 From: Matthijs Vos Date: Wed, 10 Apr 2019 13:01:01 +0200 Subject: [PATCH 358/889] Try it with a string --- scrapy/commands/check.py | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/scrapy/commands/check.py b/scrapy/commands/check.py index b29587fa7..ab73e85e7 100644 --- a/scrapy/commands/check.py +++ b/scrapy/commands/check.py @@ -68,7 +68,7 @@ class Command(ScrapyCommand): spider_loader = self.crawler_process.spider_loader - with set_environ(SCRAPY_CHECK=True): + with set_environ(SCRAPY_CHECK='true'): for spidername in args or spider_loader.list(): spidercls = spider_loader.load(spidername) spidercls.start_requests = lambda s: conman.from_spider(s, result) From 07adca34e1378b11dff9e3f11d3760c54f5fa1ef Mon Sep 17 00:00:00 2001 From: Matthijs Vos Date: Wed, 10 Apr 2019 13:01:46 +0200 Subject: [PATCH 359/889] Fix 'Too many values to unpack' --- scrapy/utils/misc.py | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/scrapy/utils/misc.py b/scrapy/utils/misc.py index 7a2cd18ea..cdd5a11c9 100644 --- a/scrapy/utils/misc.py +++ b/scrapy/utils/misc.py @@ -156,7 +156,7 @@ def set_environ(**kwargs): try: yield finally: - for k, v in original_env: + for k, v in original_env.items(): if v is None: del os.environ[k] else: From fbb42fe14ed23aaba37b42d12c7adbf513f9089e Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Adri=C3=A1n=20Chaves?= Date: Wed, 17 Apr 2019 08:25:22 +0200 Subject: [PATCH 360/889] Cover PEP 257 in the documentation policies --- docs/contributing.rst | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/docs/contributing.rst b/docs/contributing.rst index aac0f4496..c31a17609 100644 --- a/docs/contributing.rst +++ b/docs/contributing.rst @@ -167,8 +167,9 @@ Documentation policies For reference documentation of API members (classes, methods, etc.) use docstrings and make sure that the Sphinx documentation uses the autodoc_ -extension to pull the docstrings. API reference documentation should be -IDE-friendly: short, to the point, and it may provide short examples. +extension to pull the docstrings. API reference documentation should follow +docstring conventions (`PEP 257`_) and be IDE-friendly: short, to the point, +and it may provide short examples. Other types of documentation, such as tutorials or topics, should be covered in files within the ``docs/`` directory. This includes documentation that is @@ -237,5 +238,6 @@ And their unit-tests are in:: .. _AUTHORS: https://github.com/scrapy/scrapy/blob/master/AUTHORS .. _tests/: https://github.com/scrapy/scrapy/tree/master/tests .. _open issues: https://github.com/scrapy/scrapy/issues +.. _PEP 257: https://www.python.org/dev/peps/pep-0257/ .. _pull request: https://help.github.com/send-pull-requests/ .. _tox: https://pypi.python.org/pypi/tox From 5a6fb3daa6e6a15effe9377dbcc85e67bec9aec7 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Adri=C3=A1n=20Chaves?= Date: Fri, 29 Mar 2019 17:10:16 +0100 Subject: [PATCH 361/889] Use pytest-xdist --- docs/contributing.rst | 26 ++++++++++++++++++++++++++ tests/requirements-py2.txt | 5 +++-- tests/requirements-py3.txt | 5 +++-- 3 files changed, 32 insertions(+), 4 deletions(-) diff --git a/docs/contributing.rst b/docs/contributing.rst index aac0f4496..b462ae331 100644 --- a/docs/contributing.rst +++ b/docs/contributing.rst @@ -205,6 +205,29 @@ To run a specific test (say ``tests/test_loader.py``) use: ``tox -- tests/test_loader.py`` +To run the tests on a specific tox_ environment, use ``-e `` with an +environment name from ``tox.ini``. For example, to run the tests with Python +3.6 use:: + + tox -e py36 + +You can also specify a comma-separated list of environmets, and use `tox’s +parallel mode`_ to run the tests on multiple environments in parallel:: + + tox -e py27,py36 -p auto + +To pass command-line options to pytest_, add them after ``--`` in your call to +tox_. Using ``--`` overrides the default positional arguments defined in +``tox.ini``, so you must include those default positional arguments +(``scrapy tests``) after ``--`` as well:: + + tox -- scrapy tests -x # stop after first failure + +You can also use the `pytest-xdist`_ plugin. For example, to run all tests on +the Python 3.6 tox_ environment using all your CPU cores:: + + tox -e py36 -- scrapy tests -n auto + To see coverage report install `coverage`_ (``pip install coverage``) and run: ``coverage report`` @@ -238,4 +261,7 @@ And their unit-tests are in:: .. _tests/: https://github.com/scrapy/scrapy/tree/master/tests .. _open issues: https://github.com/scrapy/scrapy/issues .. _pull request: https://help.github.com/send-pull-requests/ +.. _pytest: https://docs.pytest.org/en/latest/usage.html +.. _pytest-xdist: https://docs.pytest.org/en/3.0.0/xdist.html .. _tox: https://pypi.python.org/pypi/tox +.. _tox’s parallel mode: https://tox.readthedocs.io/en/latest/example/basic.html#parallel-mode diff --git a/tests/requirements-py2.txt b/tests/requirements-py2.txt index 790f29d34..be809b151 100644 --- a/tests/requirements-py2.txt +++ b/tests/requirements-py2.txt @@ -2,9 +2,10 @@ mock mitmproxy==0.10.1 netlib==0.10.1 -pytest==2.9.2 +pytest +pytest-cov pytest-twisted -pytest-cov==2.2.1 +pytest-xdist jmespath brotlipy testfixtures diff --git a/tests/requirements-py3.txt b/tests/requirements-py3.txt index 7c1aacd81..ed7bf0be0 100644 --- a/tests/requirements-py3.txt +++ b/tests/requirements-py3.txt @@ -1,6 +1,7 @@ -pytest==3.6.3 +pytest +pytest-cov pytest-twisted -pytest-cov==2.5.1 +pytest-xdist testfixtures jmespath leveldb; sys_platform != "win32" From 29739989478bb1b10467b036df91326071b1ffbc Mon Sep 17 00:00:00 2001 From: Matthijs Vos Date: Thu, 18 Apr 2019 14:50:02 +0200 Subject: [PATCH 362/889] Add set_environ test --- tests/test_utils_misc/__init__.py | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/tests/test_utils_misc/__init__.py b/tests/test_utils_misc/__init__.py index fcb7772ab..738120a0b 100644 --- a/tests/test_utils_misc/__init__.py +++ b/tests/test_utils_misc/__init__.py @@ -3,7 +3,7 @@ import os import unittest from scrapy.item import Item, Field -from scrapy.utils.misc import arg_to_iter, create_instance, load_object, walk_modules +from scrapy.utils.misc import arg_to_iter, create_instance, load_object, walk_modules, set_environ from tests import mock @@ -130,5 +130,12 @@ class UtilsMiscTestCase(unittest.TestCase): with self.assertRaises(ValueError): create_instance(m, None, None) + def test_set_environ(self): + assert os.environ.get('some_test_environ') is None + with set_environ(some_test_environ='test_value'): + assert os.environ.get('some_test_environ') == 'test_value' + assert os.environ.get('some_test_environ') is None + + if __name__ == "__main__": unittest.main() From 6d52708579be05c29c58d6ccc63486f761466d18 Mon Sep 17 00:00:00 2001 From: Matthijs Vos Date: Thu, 18 Apr 2019 15:19:23 +0200 Subject: [PATCH 363/889] Add reset case --- tests/test_utils_misc/__init__.py | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/tests/test_utils_misc/__init__.py b/tests/test_utils_misc/__init__.py index 738120a0b..eeb995e48 100644 --- a/tests/test_utils_misc/__init__.py +++ b/tests/test_utils_misc/__init__.py @@ -136,6 +136,12 @@ class UtilsMiscTestCase(unittest.TestCase): assert os.environ.get('some_test_environ') == 'test_value' assert os.environ.get('some_test_environ') is None + os.environ['some_test_environ'] = 'test' + assert os.environ.get('some_test_environ') == 'test' + with set_environ(some_test_environ='test_value'): + assert os.environ.get('some_test_environ') == 'test_value' + assert os.environ.get('some_test_environ') == 'test' + if __name__ == "__main__": unittest.main() From 935387aaea2f0bdc28504b40dfc9ccbbb437bec4 Mon Sep 17 00:00:00 2001 From: Matthijs Vos Date: Thu, 18 Apr 2019 22:10:23 +0200 Subject: [PATCH 364/889] Revert some non-changes --- scrapy/utils/misc.py | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/scrapy/utils/misc.py b/scrapy/utils/misc.py index cdd5a11c9..f51012e3d 100644 --- a/scrapy/utils/misc.py +++ b/scrapy/utils/misc.py @@ -41,7 +41,7 @@ def load_object(path): except ValueError: raise ValueError("Error loading object '%s': not a full path" % path) - module, name = path[:dot], path[dot + 1:] + module, name = path[:dot], path[dot+1:] mod = import_module(module) try: @@ -86,9 +86,9 @@ def extract_regex(regex, text, encoding='utf-8'): regex = re.compile(regex, re.UNICODE) try: - strings = [regex.search(text).group('extract')] # named group + strings = [regex.search(text).group('extract')] # named group except Exception: - strings = regex.findall(text) # full regex or numbered groups + strings = regex.findall(text) # full regex or numbered groups strings = flatten(strings) if isinstance(text, six.text_type): From 7809c0b14e3ad62aea8e62c7309997ecb64fbbf1 Mon Sep 17 00:00:00 2001 From: Matthijs Vos Date: Sat, 20 Apr 2019 09:25:01 +0200 Subject: [PATCH 365/889] Revert another non-change comment --- scrapy/utils/misc.py | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/scrapy/utils/misc.py b/scrapy/utils/misc.py index f51012e3d..b2164d4a8 100644 --- a/scrapy/utils/misc.py +++ b/scrapy/utils/misc.py @@ -88,7 +88,7 @@ def extract_regex(regex, text, encoding='utf-8'): try: strings = [regex.search(text).group('extract')] # named group except Exception: - strings = regex.findall(text) # full regex or numbered groups + strings = regex.findall(text) # full regex or numbered groups strings = flatten(strings) if isinstance(text, six.text_type): From 122ca6211935039825aff900e98bc1fbdb4dc0d6 Mon Sep 17 00:00:00 2001 From: Vandenn Date: Thu, 2 May 2019 23:59:01 +0800 Subject: [PATCH 366/889] doc: update configure_logging docs to discourage use with CrawlerProcess --- docs/topics/logging.rst | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/docs/topics/logging.rst b/docs/topics/logging.rst index 8e280d929..dea0528db 100644 --- a/docs/topics/logging.rst +++ b/docs/topics/logging.rst @@ -238,9 +238,10 @@ scrapy.utils.log module .. autofunction:: configure_logging - ``configure_logging`` is automatically called when using Scrapy commands, - but needs to be called explicitly when running custom scripts. In that - case, its usage is not required but it's recommended. + ``configure_logging`` is automatically called when using Scrapy commands + or :class:`~scrapy.crawler.CrawlerProcess`, but needs to be called explicitly + when running custom scripts using :class:`~scrapy.crawler.CrawlerRunner`. + In that case, its usage is not required but it's recommended. If you plan on configuring the handlers yourself is still recommended you call this function, passing ``install_root_handler=False``. Bear in mind From 8bd207a2f639216eb51f61ae312dfd22f4b39781 Mon Sep 17 00:00:00 2001 From: Matthijs Vos Date: Sun, 28 Apr 2019 21:47:47 +0200 Subject: [PATCH 367/889] Add documentation --- docs/topics/contracts.rst | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/docs/topics/contracts.rst b/docs/topics/contracts.rst index 70f20d4ed..3aa32cba8 100644 --- a/docs/topics/contracts.rst +++ b/docs/topics/contracts.rst @@ -120,3 +120,22 @@ get the failures pretty printed:: for header in self.args: if header not in response.headers: raise ContractFail('X-CustomHeader not present') + + +Detecting check run +=================== +It is not encouraged to created different behaviour when running test. +However, sometimes it is useful to know when a spider is started by scrapy check. +It can for example be needed to enforce less settings to be set, or to disable some +uploading of result data. When scrapy check is runned the ``SCRAPY_CHECK`` environment +variable is set. This can be retrieved via ``os.environ``:: + + import os + import scrapy + + class ExampleSpider(scrapy.Spider): + name = 'example' + + def __init__(self): + if os.environ.get('SCRAPY_CHECK'): + # Do some scraper adjustments when check is running \ No newline at end of file From f6485e669772a940c3c319c71dbcca7bd747d57a Mon Sep 17 00:00:00 2001 From: Matthijs Vos Date: Fri, 3 May 2019 13:53:45 +0200 Subject: [PATCH 368/889] Restore alphabetic order and two lines between import and code --- scrapy/utils/misc.py | 1 + tests/test_utils_misc/__init__.py | 3 ++- 2 files changed, 3 insertions(+), 1 deletion(-) diff --git a/scrapy/utils/misc.py b/scrapy/utils/misc.py index b2164d4a8..f638adb25 100644 --- a/scrapy/utils/misc.py +++ b/scrapy/utils/misc.py @@ -12,6 +12,7 @@ from w3lib.html import replace_entities from scrapy.utils.python import flatten, to_unicode from scrapy.item import BaseItem + _ITERABLE_SINGLE_VALUES = dict, BaseItem, six.text_type, bytes diff --git a/tests/test_utils_misc/__init__.py b/tests/test_utils_misc/__init__.py index eeb995e48..e109d5343 100644 --- a/tests/test_utils_misc/__init__.py +++ b/tests/test_utils_misc/__init__.py @@ -3,12 +3,13 @@ import os import unittest from scrapy.item import Item, Field -from scrapy.utils.misc import arg_to_iter, create_instance, load_object, walk_modules, set_environ +from scrapy.utils.misc import arg_to_iter, create_instance, load_object, set_environ, walk_modules from tests import mock __doctests__ = ['scrapy.utils.misc'] + class UtilsMiscTestCase(unittest.TestCase): def test_load_object(self): From bc1a92921364de8f4616feb0ea7dcb7b6d42d2b6 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Adri=C3=A1n=20Chaves?= Date: Fri, 3 May 2019 14:42:12 +0200 Subject: [PATCH 369/889] Improve the documentation about detecting check runs --- docs/topics/contracts.rst | 17 +++++++++-------- 1 file changed, 9 insertions(+), 8 deletions(-) diff --git a/docs/topics/contracts.rst b/docs/topics/contracts.rst index 3aa32cba8..9337375bb 100644 --- a/docs/topics/contracts.rst +++ b/docs/topics/contracts.rst @@ -122,13 +122,12 @@ get the failures pretty printed:: raise ContractFail('X-CustomHeader not present') -Detecting check run -=================== -It is not encouraged to created different behaviour when running test. -However, sometimes it is useful to know when a spider is started by scrapy check. -It can for example be needed to enforce less settings to be set, or to disable some -uploading of result data. When scrapy check is runned the ``SCRAPY_CHECK`` environment -variable is set. This can be retrieved via ``os.environ``:: +Detecting check runs +==================== + +When ``scrapy check`` is running, the ``SCRAPY_CHECK`` environment variable is +set to the ``true`` string. You can use `os.environ`_ to perform any change to +your spiders or your settings when ``scrapy check`` is used:: import os import scrapy @@ -138,4 +137,6 @@ variable is set. This can be retrieved via ``os.environ``:: def __init__(self): if os.environ.get('SCRAPY_CHECK'): - # Do some scraper adjustments when check is running \ No newline at end of file + pass # Do some scraper adjustments when a check is running + +.. _os.environ: https://docs.python.org/3/library/os.html#os.environ From 5814344adfc315a63f43237f02ed75db52765b7d Mon Sep 17 00:00:00 2001 From: Jeffallan <23423962+Jeffallan@users.noreply.github.com> Date: Sat, 4 May 2019 14:15:47 -0500 Subject: [PATCH 370/889] Update telnetconsole.rst Change spelling of bellow to below. --- docs/topics/telnetconsole.rst | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/docs/topics/telnetconsole.rst b/docs/topics/telnetconsole.rst index bf2ffa443..1eb705f05 100644 --- a/docs/topics/telnetconsole.rst +++ b/docs/topics/telnetconsole.rst @@ -45,7 +45,7 @@ the console you need to type:: >>> By default Username is ``scrapy`` and Password is autogenerated. The -autogenerated Password can be seen on scrapy logs like the example bellow:: +autogenerated Password can be seen on scrapy logs like the example below:: 2018-10-16 14:35:21 [scrapy.extensions.telnet] INFO: Telnet Password: 16f92501e8a59326 From 3a7850fa158148e6c6096add09b555e46949bd51 Mon Sep 17 00:00:00 2001 From: Aditya Date: Sun, 5 May 2019 18:45:40 +0530 Subject: [PATCH 371/889] Update contributing.rst --- docs/contributing.rst | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/docs/contributing.rst b/docs/contributing.rst index 2fbe30a00..51b5da59e 100644 --- a/docs/contributing.rst +++ b/docs/contributing.rst @@ -262,7 +262,7 @@ And their unit-tests are in:: .. _tests/: https://github.com/scrapy/scrapy/tree/master/tests .. _open issues: https://github.com/scrapy/scrapy/issues .. _PEP 257: https://www.python.org/dev/peps/pep-0257/ -.. _pull request: https://help.github.com/send-pull-requests/ +.. _pull request: https://help.github.com/en/articles/creating-a-pull-request .. _pytest: https://docs.pytest.org/en/latest/usage.html .. _pytest-xdist: https://docs.pytest.org/en/3.0.0/xdist.html .. _tox: https://pypi.python.org/pypi/tox From 611249bb7f3a7bb5a92a67d90d6c97f17494768f Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Adri=C3=A1n=20Chaves?= Date: Wed, 8 May 2019 12:52:29 +0200 Subject: [PATCH 372/889] Implement the METAREFRESH_IGNORE_TAGS setting --- docs/topics/downloader-middleware.rst | 10 ++++++++++ scrapy/downloadermiddlewares/redirect.py | 4 +++- scrapy/settings/default_settings.py | 1 + scrapy/utils/response.py | 4 ++-- tests/test_downloadermiddleware_redirect.py | 19 +++++++++++++++++++ 5 files changed, 35 insertions(+), 3 deletions(-) diff --git a/docs/topics/downloader-middleware.rst b/docs/topics/downloader-middleware.rst index f2f3ef466..fa65f66ed 100644 --- a/docs/topics/downloader-middleware.rst +++ b/docs/topics/downloader-middleware.rst @@ -805,6 +805,7 @@ The :class:`MetaRefreshMiddleware` can be configured through the following settings (see the settings documentation for more info): * :setting:`METAREFRESH_ENABLED` +* :setting:`METAREFRESH_IGNORE_TAGS` * :setting:`METAREFRESH_MAXDELAY` This middleware obey :setting:`REDIRECT_MAX_TIMES` setting, :reqmeta:`dont_redirect`, @@ -826,6 +827,15 @@ Default: ``True`` Whether the Meta Refresh middleware will be enabled. +.. setting:: METAREFRESH_IGNORE_TAGS + +METAREFRESH_IGNORE_TAGS +^^^^^^^^^^^^^^^^^^^^^^^ + +Default: ``['script', 'noscript']`` + +Meta tags within these tags are ignored. + .. setting:: METAREFRESH_MAXDELAY METAREFRESH_MAXDELAY diff --git a/scrapy/downloadermiddlewares/redirect.py b/scrapy/downloadermiddlewares/redirect.py index cb59d3fd2..49468a2e4 100644 --- a/scrapy/downloadermiddlewares/redirect.py +++ b/scrapy/downloadermiddlewares/redirect.py @@ -88,6 +88,7 @@ class MetaRefreshMiddleware(BaseRedirectMiddleware): def __init__(self, settings): super(MetaRefreshMiddleware, self).__init__(settings) + self._ignore_tags = settings.getlist('METAREFRESH_IGNORE_TAGS') self._maxdelay = settings.getint('REDIRECT_MAX_METAREFRESH_DELAY', settings.getint('METAREFRESH_MAXDELAY')) @@ -96,7 +97,8 @@ class MetaRefreshMiddleware(BaseRedirectMiddleware): not isinstance(response, HtmlResponse): return response - interval, url = get_meta_refresh(response) + interval, url = get_meta_refresh(response, + ignore_tags=self._ignore_tags) if url and interval < self._maxdelay: redirected = self._redirect_request_using_get(request, url) return self._redirect(redirected, request, spider, 'meta refresh') diff --git a/scrapy/settings/default_settings.py b/scrapy/settings/default_settings.py index 9986827d8..1ce1516e5 100644 --- a/scrapy/settings/default_settings.py +++ b/scrapy/settings/default_settings.py @@ -221,6 +221,7 @@ MEMUSAGE_NOTIFY_MAIL = [] MEMUSAGE_WARNING_MB = 0 METAREFRESH_ENABLED = True +METAREFRESH_IGNORE_TAGS = ['script', 'noscript'] METAREFRESH_MAXDELAY = 100 NEWSPIDER_MODULE = '' diff --git a/scrapy/utils/response.py b/scrapy/utils/response.py index bf276b5ca..122af28b0 100644 --- a/scrapy/utils/response.py +++ b/scrapy/utils/response.py @@ -31,12 +31,12 @@ def get_base_url(response): _metaref_cache = weakref.WeakKeyDictionary() -def get_meta_refresh(response): +def get_meta_refresh(response, ignore_tags=('script', 'noscript')): """Parse the http-equiv refrsh parameter from the given response""" if response not in _metaref_cache: text = response.text[0:4096] _metaref_cache[response] = html.get_meta_refresh(text, response.url, - response.encoding, ignore_tags=('script', 'noscript')) + response.encoding, ignore_tags=ignore_tags) return _metaref_cache[response] diff --git a/tests/test_downloadermiddleware_redirect.py b/tests/test_downloadermiddleware_redirect.py index 6c81c94ca..0e841489d 100644 --- a/tests/test_downloadermiddleware_redirect.py +++ b/tests/test_downloadermiddleware_redirect.py @@ -279,5 +279,24 @@ class MetaRefreshMiddlewareTest(unittest.TestCase): self.assertEqual(req2.meta['redirect_reasons'], ['meta refresh']) self.assertEqual(req3.meta['redirect_reasons'], ['meta refresh', 'meta refresh']) + def test_ignore_tags_default(self): + req = Request(url='http://example.org') + body = ('''''') + rsp = HtmlResponse(req.url, body=body.encode()) + response = self.mw.process_response(req, rsp, self.spider) + assert isinstance(response, Response) + + def test_ignore_tags_empty_list(self): + crawler = get_crawler(Spider, {'METAREFRESH_IGNORE_TAGS': []}) + mw = MetaRefreshMiddleware.from_crawler(crawler) + req = Request(url='http://example.org') + body = ('''''') + rsp = HtmlResponse(req.url, body=body.encode()) + req2 = mw.process_response(req, rsp, self.spider) + assert isinstance(req2, Request) + self.assertEqual(req2.url, 'http://example.org/newpage') + if __name__ == "__main__": unittest.main() From e667ca76820a53ac3abf34604fc284761f936bb9 Mon Sep 17 00:00:00 2001 From: Andrew Baxter Date: Fri, 24 May 2019 21:45:53 +0900 Subject: [PATCH 373/889] Account for mangling when serializing requests with private callbacks --- scrapy/utils/reqser.py | 6 +++++- tests/test_utils_reqser.py | 9 +++++++++ 2 files changed, 14 insertions(+), 1 deletion(-) diff --git a/scrapy/utils/reqser.py b/scrapy/utils/reqser.py index 959dddbd5..8c99763cf 100644 --- a/scrapy/utils/reqser.py +++ b/scrapy/utils/reqser.py @@ -75,7 +75,11 @@ def _find_method(obj, func): pass else: if func_self is obj: - return six.get_method_function(func).__name__ + name = six.get_method_function(func).__name__ + if name.startswith('__'): + classname = obj.__class__.__name__.lstrip('_') + name = '_%s%s' % (classname, name) + return name raise ValueError("Function %s is not a method of: %s" % (func, obj)) diff --git a/tests/test_utils_reqser.py b/tests/test_utils_reqser.py index dcc070b8f..f7191fcef 100644 --- a/tests/test_utils_reqser.py +++ b/tests/test_utils_reqser.py @@ -68,6 +68,12 @@ class RequestSerializationTest(unittest.TestCase): errback=self.spider.handle_error) self._assert_serializes_ok(r, spider=self.spider) + def test_private_callback_serialization(self): + r = Request("http://www.example.com", + callback=self.spider._TestSpider__parse_item_private, + errback=self.spider.handle_error) + self._assert_serializes_ok(r, spider=self.spider) + def test_unserializable_callback1(self): r = Request("http://www.example.com", callback=lambda x: x) self.assertRaises(ValueError, request_to_dict, r) @@ -87,6 +93,9 @@ class TestSpider(Spider): def handle_error(self, failure): pass + def __parse_item_private(self, response): + pass + class CustomRequest(Request): pass From 7d36fa7435d2147c7dfd6a87733187823431b61c Mon Sep 17 00:00:00 2001 From: Capi Etheriel Date: Fri, 24 May 2019 10:32:55 -0300 Subject: [PATCH 374/889] Fix documentation for spiderloader --- docs/topics/api.rst | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/docs/topics/api.rst b/docs/topics/api.rst index ba832ab5d..e1623287d 100644 --- a/docs/topics/api.rst +++ b/docs/topics/api.rst @@ -154,7 +154,7 @@ Settings API SpiderLoader API ================ -.. module:: scrapy.loader +.. module:: scrapy.spiderloader :synopsis: The spider loader .. class:: SpiderLoader From 0ee2284fcc23ccb2b8a4da8fb561a232cc328fe0 Mon Sep 17 00:00:00 2001 From: Capi Etheriel Date: Fri, 24 May 2019 11:11:15 -0300 Subject: [PATCH 375/889] Add 429 to RETRY_HTTP_CODES --- scrapy/settings/default_settings.py | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/scrapy/settings/default_settings.py b/scrapy/settings/default_settings.py index 9986827d8..2afa7b321 100644 --- a/scrapy/settings/default_settings.py +++ b/scrapy/settings/default_settings.py @@ -238,7 +238,7 @@ REFERRER_POLICY = 'scrapy.spidermiddlewares.referer.DefaultReferrerPolicy' RETRY_ENABLED = True RETRY_TIMES = 2 # initial response + 2 retries = 3 requests -RETRY_HTTP_CODES = [500, 502, 503, 504, 522, 524, 408] +RETRY_HTTP_CODES = [500, 502, 503, 504, 522, 524, 408, 429] RETRY_PRIORITY_ADJUST = -1 ROBOTSTXT_OBEY = False From 144afcee7973ab97d6c8d89fec007046cc878e3d Mon Sep 17 00:00:00 2001 From: Andrew Baxter Date: Sat, 25 May 2019 00:52:00 +0900 Subject: [PATCH 376/889] Use regex to check for private methods --- scrapy/utils/reqser.py | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/scrapy/utils/reqser.py b/scrapy/utils/reqser.py index 8c99763cf..07c51aaff 100644 --- a/scrapy/utils/reqser.py +++ b/scrapy/utils/reqser.py @@ -2,12 +2,16 @@ Helper functions for serializing (and deserializing) requests. """ import six +import re from scrapy.http import Request from scrapy.utils.python import to_unicode, to_native_str from scrapy.utils.misc import load_object +private_name_regex = re.compile('^__[^_](.*[^_])?_?$') + + def request_to_dict(request, spider=None): """Convert Request object to a dict. @@ -76,7 +80,7 @@ def _find_method(obj, func): else: if func_self is obj: name = six.get_method_function(func).__name__ - if name.startswith('__'): + if private_name_regex.search(name): classname = obj.__class__.__name__.lstrip('_') name = '_%s%s' % (classname, name) return name From 461682fc3dca72d9a34ddc22ad1896787c9dc518 Mon Sep 17 00:00:00 2001 From: Claudio Salazar Date: Sat, 25 May 2019 11:01:19 +0200 Subject: [PATCH 377/889] Whitelist form methods in FormRequest.from_response method --- scrapy/http/request/form.py | 7 ++++++- tests/test_http_request.py | 13 +++++++++++++ 2 files changed, 19 insertions(+), 1 deletion(-) diff --git a/scrapy/http/request/form.py b/scrapy/http/request/form.py index c2413b431..2182b9b53 100644 --- a/scrapy/http/request/form.py +++ b/scrapy/http/request/form.py @@ -18,6 +18,7 @@ from scrapy.utils.response import get_base_url class FormRequest(Request): + valid_form_methods = ['GET', 'POST', 'DIALOG'] def __init__(self, *args, **kwargs): formdata = kwargs.pop('formdata', None) @@ -48,7 +49,11 @@ class FormRequest(Request): form = _get_form(response, formname, formid, formnumber, formxpath) formdata = _get_inputs(form, formdata, dont_click, clickdata, response) url = _get_form_url(form, kwargs.pop('url', None)) - method = kwargs.pop('method', form.method) + + method = kwargs.pop('method', form.method).upper() + if method not in cls.valid_form_methods: + raise ValueError('Invalid form method in chosen form') + return cls(url=url, method=method, formdata=formdata, **kwargs) diff --git a/tests/test_http_request.py b/tests/test_http_request.py index 49f148016..8fdafb286 100644 --- a/tests/test_http_request.py +++ b/tests/test_http_request.py @@ -1100,6 +1100,19 @@ class FormRequestTest(RequestTest): self.assertRaises(ValueError, self.request_class.from_response, response, formcss="input[name='abc']") + def test_from_response_valid_form_methods(self): + body = """ + + """ + + for method in self.request_class.valid_form_methods: + response = _buildresponse(body % method) + r1 = self.request_class.from_response(response) + self.assertEqual(r1.method, method) + + response = _buildresponse(body % 'UNKNOWN') + self.assertRaises(ValueError, self.request_class.from_response, response) + def _buildresponse(body, **kwargs): kwargs.setdefault('body', body) From da82ede8a0751cf3e8496f35252eb0dcef4f197e Mon Sep 17 00:00:00 2001 From: Anubhav Patel Date: Sat, 25 May 2019 17:19:10 +0530 Subject: [PATCH 378/889] describe method as a command --- docs/topics/downloader-middleware.rst | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/docs/topics/downloader-middleware.rst b/docs/topics/downloader-middleware.rst index dfbcdb8fa..236150059 100644 --- a/docs/topics/downloader-middleware.rst +++ b/docs/topics/downloader-middleware.rst @@ -526,7 +526,7 @@ defines the methods described below. .. method:: retrieve_response(spider, request) - Returns response if present in cache, or ``None`` otherwise. + Return response if present in cache, or ``None`` otherwise. :param spider: the spider which generated the request :type spider: :class:`~scrapy.spiders.Spider` object @@ -536,7 +536,7 @@ defines the methods described below. .. method:: store_response(spider, request, response) - Stores the given response in the cache. + Store the given response in the cache. :param spider: the spider for which the response is intended :type spider: :class:`~scrapy.spiders.Spider` object From 18f01ea6ecf1dba77b25d8d1f62c80ed0f9a13f5 Mon Sep 17 00:00:00 2001 From: mar-heaven <775650117@qq.com> Date: Mon, 27 May 2019 17:15:30 +0800 Subject: [PATCH 379/889] remove a "is" When I translated in Chinese, I found a needless "is" --- docs/topics/spiders.rst | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/docs/topics/spiders.rst b/docs/topics/spiders.rst index 8c4049f85..79eecfc3e 100644 --- a/docs/topics/spiders.rst +++ b/docs/topics/spiders.rst @@ -657,7 +657,7 @@ SitemapSpider .. attribute:: sitemap_follow - A list of regexes of sitemap that should be followed. This is is only + A list of regexes of sitemap that should be followed. This is only for sites that use `Sitemap index files`_ that point to other sitemap files. From 72b7d3e90ac2d21ffdd0c44878ec1a5a5d0fa5ce Mon Sep 17 00:00:00 2001 From: Andrew Baxter Date: Mon, 27 May 2019 23:30:23 +0900 Subject: [PATCH 380/889] Make the regex align to the spec better; add unit tests for name variations --- scrapy/utils/reqser.py | 2 +- tests/test_utils_reqser.py | 24 +++++++++++++++++++++++- 2 files changed, 24 insertions(+), 2 deletions(-) diff --git a/scrapy/utils/reqser.py b/scrapy/utils/reqser.py index 07c51aaff..04665a2d4 100644 --- a/scrapy/utils/reqser.py +++ b/scrapy/utils/reqser.py @@ -9,7 +9,7 @@ from scrapy.utils.python import to_unicode, to_native_str from scrapy.utils.misc import load_object -private_name_regex = re.compile('^__[^_](.*[^_])?_?$') +private_name_regex = re.compile('^__.*[^_]_?$') def request_to_dict(request, spider=None): diff --git a/tests/test_utils_reqser.py b/tests/test_utils_reqser.py index f7191fcef..b49450ac5 100644 --- a/tests/test_utils_reqser.py +++ b/tests/test_utils_reqser.py @@ -3,7 +3,7 @@ import unittest from scrapy.http import Request, FormRequest from scrapy.spiders import Spider -from scrapy.utils.reqser import request_to_dict, request_from_dict +from scrapy.utils.reqser import request_to_dict, request_from_dict, private_name_regex class RequestSerializationTest(unittest.TestCase): @@ -74,6 +74,28 @@ class RequestSerializationTest(unittest.TestCase): errback=self.spider.handle_error) self._assert_serializes_ok(r, spider=self.spider) + def test_private_callback_name_matching(self): + self.assertTrue(private_name_regex.search('__a')) + self.assertTrue(private_name_regex.search('__a_')) + self.assertTrue(private_name_regex.search('__a_a')) + self.assertTrue(private_name_regex.search('__a_a_')) + self.assertTrue(private_name_regex.search('__a__a')) + self.assertTrue(private_name_regex.search('__a__a_')) + self.assertTrue(private_name_regex.search('__a___a')) + self.assertTrue(private_name_regex.search('__a___a_')) + self.assertTrue(private_name_regex.search('___a')) + self.assertTrue(private_name_regex.search('___a_')) + self.assertTrue(private_name_regex.search('___a_a')) + self.assertTrue(private_name_regex.search('___a_a_')) + self.assertTrue(private_name_regex.search('____a_a_')) + + self.assertFalse(private_name_regex.search('_a')) + self.assertFalse(private_name_regex.search('_a_')) + self.assertFalse(private_name_regex.search('__a__')) + self.assertFalse(private_name_regex.search('__')) + self.assertFalse(private_name_regex.search('___')) + self.assertFalse(private_name_regex.search('____')) + def test_unserializable_callback1(self): r = Request("http://www.example.com", callback=lambda x: x) self.assertRaises(ValueError, request_to_dict, r) From 9af91a26b035a10e9303227ad9ddd5e043725514 Mon Sep 17 00:00:00 2001 From: Andrew Baxter Date: Tue, 28 May 2019 01:40:26 +0900 Subject: [PATCH 381/889] Replace regex usage --- scrapy/utils/reqser.py | 10 +++++----- tests/test_utils_reqser.py | 40 +++++++++++++++++++------------------- 2 files changed, 25 insertions(+), 25 deletions(-) diff --git a/scrapy/utils/reqser.py b/scrapy/utils/reqser.py index 04665a2d4..40223661f 100644 --- a/scrapy/utils/reqser.py +++ b/scrapy/utils/reqser.py @@ -2,16 +2,12 @@ Helper functions for serializing (and deserializing) requests. """ import six -import re from scrapy.http import Request from scrapy.utils.python import to_unicode, to_native_str from scrapy.utils.misc import load_object -private_name_regex = re.compile('^__.*[^_]_?$') - - def request_to_dict(request, spider=None): """Convert Request object to a dict. @@ -71,6 +67,10 @@ def request_from_dict(d, spider=None): flags=d.get('flags')) +def _is_private_method(name): + return name.startswith('__') and not name.endswith('__') + + def _find_method(obj, func): if obj: try: @@ -80,7 +80,7 @@ def _find_method(obj, func): else: if func_self is obj: name = six.get_method_function(func).__name__ - if private_name_regex.search(name): + if _is_private_method(name): classname = obj.__class__.__name__.lstrip('_') name = '_%s%s' % (classname, name) return name diff --git a/tests/test_utils_reqser.py b/tests/test_utils_reqser.py index b49450ac5..fad5b6003 100644 --- a/tests/test_utils_reqser.py +++ b/tests/test_utils_reqser.py @@ -3,7 +3,7 @@ import unittest from scrapy.http import Request, FormRequest from scrapy.spiders import Spider -from scrapy.utils.reqser import request_to_dict, request_from_dict, private_name_regex +from scrapy.utils.reqser import request_to_dict, request_from_dict, _is_private_method class RequestSerializationTest(unittest.TestCase): @@ -75,26 +75,26 @@ class RequestSerializationTest(unittest.TestCase): self._assert_serializes_ok(r, spider=self.spider) def test_private_callback_name_matching(self): - self.assertTrue(private_name_regex.search('__a')) - self.assertTrue(private_name_regex.search('__a_')) - self.assertTrue(private_name_regex.search('__a_a')) - self.assertTrue(private_name_regex.search('__a_a_')) - self.assertTrue(private_name_regex.search('__a__a')) - self.assertTrue(private_name_regex.search('__a__a_')) - self.assertTrue(private_name_regex.search('__a___a')) - self.assertTrue(private_name_regex.search('__a___a_')) - self.assertTrue(private_name_regex.search('___a')) - self.assertTrue(private_name_regex.search('___a_')) - self.assertTrue(private_name_regex.search('___a_a')) - self.assertTrue(private_name_regex.search('___a_a_')) - self.assertTrue(private_name_regex.search('____a_a_')) + self.assertTrue(_is_private_method('__a')) + self.assertTrue(_is_private_method('__a_')) + self.assertTrue(_is_private_method('__a_a')) + self.assertTrue(_is_private_method('__a_a_')) + self.assertTrue(_is_private_method('__a__a')) + self.assertTrue(_is_private_method('__a__a_')) + self.assertTrue(_is_private_method('__a___a')) + self.assertTrue(_is_private_method('__a___a_')) + self.assertTrue(_is_private_method('___a')) + self.assertTrue(_is_private_method('___a_')) + self.assertTrue(_is_private_method('___a_a')) + self.assertTrue(_is_private_method('___a_a_')) + self.assertTrue(_is_private_method('____a_a_')) - self.assertFalse(private_name_regex.search('_a')) - self.assertFalse(private_name_regex.search('_a_')) - self.assertFalse(private_name_regex.search('__a__')) - self.assertFalse(private_name_regex.search('__')) - self.assertFalse(private_name_regex.search('___')) - self.assertFalse(private_name_regex.search('____')) + self.assertFalse(_is_private_method('_a')) + self.assertFalse(_is_private_method('_a_')) + self.assertFalse(_is_private_method('__a__')) + self.assertFalse(_is_private_method('__')) + self.assertFalse(_is_private_method('___')) + self.assertFalse(_is_private_method('____')) def test_unserializable_callback1(self): r = Request("http://www.example.com", callback=lambda x: x) From bcad8947e8192448ab3bd59489444efb567f8793 Mon Sep 17 00:00:00 2001 From: Andrew Baxter Date: Mon, 3 Jun 2019 20:41:02 +0900 Subject: [PATCH 382/889] Support inherited private method names --- scrapy/utils/reqser.py | 9 +++++++-- tests/test_utils_reqser.py | 16 +++++++++++++++- 2 files changed, 22 insertions(+), 3 deletions(-) diff --git a/scrapy/utils/reqser.py b/scrapy/utils/reqser.py index 40223661f..d1f472e6e 100644 --- a/scrapy/utils/reqser.py +++ b/scrapy/utils/reqser.py @@ -81,8 +81,13 @@ def _find_method(obj, func): if func_self is obj: name = six.get_method_function(func).__name__ if _is_private_method(name): - classname = obj.__class__.__name__.lstrip('_') - name = '_%s%s' % (classname, name) + qualname = getattr(func, '__qualname__', None) + if qualname is None: + classname = obj.__class__.__name__.lstrip('_') + name = '_%s%s' % (classname, name) + else: + splits = qualname.split('.') + name = '_%s%s' % (splits[-2], splits[-1]) return name raise ValueError("Function %s is not a method of: %s" % (func, obj)) diff --git a/tests/test_utils_reqser.py b/tests/test_utils_reqser.py index fad5b6003..31577bc8c 100644 --- a/tests/test_utils_reqser.py +++ b/tests/test_utils_reqser.py @@ -1,5 +1,6 @@ # -*- coding: utf-8 -*- import unittest +import sys from scrapy.http import Request, FormRequest from scrapy.spiders import Spider @@ -74,6 +75,14 @@ class RequestSerializationTest(unittest.TestCase): errback=self.spider.handle_error) self._assert_serializes_ok(r, spider=self.spider) + def test_mixin_private_callback_serialization(self): + if sys.version_info[0] < 3: + return + r = Request("http://www.example.com", + callback=self.spider._TestSpiderMixin__mixin_callback, + errback=self.spider.handle_error) + self._assert_serializes_ok(r, spider=self.spider) + def test_private_callback_name_matching(self): self.assertTrue(_is_private_method('__a')) self.assertTrue(_is_private_method('__a_')) @@ -106,7 +115,12 @@ class RequestSerializationTest(unittest.TestCase): self.assertRaises(ValueError, request_to_dict, r) -class TestSpider(Spider): +class TestSpiderMixin(object): + def __mixin_callback(self, response): + pass + + +class TestSpider(Spider, TestSpiderMixin): name = 'test' def parse_item(self, response): From ea209a0ea7815f68a04a5ccab79a2b4f4a146647 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Adri=C3=A1n=20Chaves?= Date: Mon, 3 Jun 2019 19:21:40 +0200 Subject: [PATCH 383/889] Fix module double indexing issues in the documentation --- docs/topics/stats.rst | 3 +-- docs/topics/telnetconsole.rst | 5 ++--- 2 files changed, 3 insertions(+), 5 deletions(-) diff --git a/docs/topics/stats.rst b/docs/topics/stats.rst index dd0c6216b..38648ec55 100644 --- a/docs/topics/stats.rst +++ b/docs/topics/stats.rst @@ -75,8 +75,7 @@ available in Scrapy which extend the basic Stats Collector. You can select which Stats Collector to use through the :setting:`STATS_CLASS` setting. The default Stats Collector used is the :class:`MemoryStatsCollector`. -.. module:: scrapy.statscollectors - :synopsis: Stats Collectors +.. currentmodule:: scrapy.statscollectors MemoryStatsCollector -------------------- diff --git a/docs/topics/telnetconsole.rst b/docs/topics/telnetconsole.rst index 1eb705f05..7db7e4f6b 100644 --- a/docs/topics/telnetconsole.rst +++ b/docs/topics/telnetconsole.rst @@ -1,12 +1,11 @@ +.. currentmodule:: scrapy.extensions.telnet + .. _topics-telnetconsole: ============== Telnet Console ============== -.. module:: scrapy.extensions.telnet - :synopsis: The Telnet Console - Scrapy comes with a built-in telnet console for inspecting and controlling a Scrapy running process. The telnet console is just a regular python shell running inside the Scrapy process, so you can do literally anything from it. From c7b5ad0e20dc736a8a08b62134c9418439fb7077 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Adri=C3=A1n=20Chaves?= Date: Fri, 4 Jan 2019 18:17:35 +0100 Subject: [PATCH 384/889] Add a Sphinx extension to generate documentation coverage information --- docs/Makefile | 3 +++ docs/conf.py | 9 ++++++++- docs/contributing.rst | 9 +++++++++ docs/requirements.txt | 2 +- tox.ini | 6 ++++++ 5 files changed, 27 insertions(+), 2 deletions(-) diff --git a/docs/Makefile b/docs/Makefile index 187f03c4c..ff68bf1ae 100644 --- a/docs/Makefile +++ b/docs/Makefile @@ -82,6 +82,9 @@ pydoc-topics: build @echo "Building finished; now copy build/pydoc-topics/pydoc_topics.py " \ "into the Lib/ directory" +coverage: BUILDER = coverage +coverage: build + htmlview: html $(PYTHON) -c "import webbrowser, os; webbrowser.open('file://' + \ os.path.realpath('build/html/index.html'))" diff --git a/docs/conf.py b/docs/conf.py index a54a6bbe9..832626f6b 100644 --- a/docs/conf.py +++ b/docs/conf.py @@ -28,7 +28,8 @@ sys.path.insert(0, path.dirname(path.dirname(__file__))) # coming with Sphinx (named 'sphinx.ext.*') or your custom ones. extensions = [ 'scrapydocs', - 'sphinx.ext.autodoc' + 'sphinx.ext.autodoc', + 'sphinx.ext.coverage', ] # Add any paths that contain templates here, relative to this directory. @@ -218,3 +219,9 @@ linkcheck_ignore = [ 'http://localhost:\d+', 'http://hg.scrapy.org', 'http://directory.google.com/' ] + + +# Options for the Coverage extension +# ---------------------------------- +coverage_ignore_pyobjects = [ +] diff --git a/docs/contributing.rst b/docs/contributing.rst index 51b5da59e..b4f91ea8d 100644 --- a/docs/contributing.rst +++ b/docs/contributing.rst @@ -99,6 +99,15 @@ Well-written patches should: the documentation changes in the same patch. See `Documentation policies`_ below. +* if you're adding a private API, please add a regular expression to the + ``coverage_ignore_pyobjects`` variable of ``docs/conf.py`` to exclude the new + private API from documentation coverage checks. + + To see if your private API is skipped properly, generate a documentation + coverage report as follows:: + + tox -e docs-coverage + .. _submitting-patches: Submitting patches diff --git a/docs/requirements.txt b/docs/requirements.txt index 8e7611d21..379da9994 100644 --- a/docs/requirements.txt +++ b/docs/requirements.txt @@ -1,2 +1,2 @@ -Sphinx>=1.6 +Sphinx>=2.1 sphinx_rtd_theme \ No newline at end of file diff --git a/tox.ini b/tox.ini index 0c0f8f7b7..157a8b3ed 100644 --- a/tox.ini +++ b/tox.ini @@ -105,6 +105,12 @@ deps = {[docs]deps} commands = sphinx-build -W -b html . {envtmpdir}/html +[testenv:docs-coverage] +changedir = {[docs]changedir} +deps = {[docs]deps} +commands = + sphinx-build -b coverage . {envtmpdir}/coverage + [testenv:docs-links] changedir = {[docs]changedir} deps = {[docs]deps} From c81e15ed6ede552c499ae3ac4e03af27b1f9ed89 Mon Sep 17 00:00:00 2001 From: Artem Kuchumov Date: Wed, 5 Jun 2019 13:15:23 +0500 Subject: [PATCH 385/889] Tutorial: scrapy shell example should say "text" not "title" (#3807) Tutorial: scrapy shell example should say "text" not "title" --- docs/intro/tutorial.rst | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/docs/intro/tutorial.rst b/docs/intro/tutorial.rst index 8bd2d27dd..a190ce407 100644 --- a/docs/intro/tutorial.rst +++ b/docs/intro/tutorial.rst @@ -379,11 +379,11 @@ variable, so that we can run our CSS selectors directly on a particular quote:: >>> quote = response.css("div.quote")[0] -Now, let's extract ``title``, ``author`` and the ``tags`` from that quote +Now, let's extract ``text``, ``author`` and the ``tags`` from that quote using the ``quote`` object we just created:: - >>> title = quote.css("span.text::text").get() - >>> title + >>> text = quote.css("span.text::text").get() + >>> text '“The world as we have created it is a process of our thinking. It cannot be changed without changing our thinking.”' >>> author = quote.css("small.author::text").get() >>> author From 9c81721c407ff41ef9dce2c33e26ac477355cf1f Mon Sep 17 00:00:00 2001 From: Andrew Baxter Date: Wed, 5 Jun 2019 23:43:56 +0900 Subject: [PATCH 386/889] Add tests for private method name mangling --- scrapy/utils/reqser.py | 18 +++++++++++------- tests/test_utils_reqser.py | 16 +++++++++++++++- 2 files changed, 26 insertions(+), 8 deletions(-) diff --git a/scrapy/utils/reqser.py b/scrapy/utils/reqser.py index d1f472e6e..3c463cfed 100644 --- a/scrapy/utils/reqser.py +++ b/scrapy/utils/reqser.py @@ -71,6 +71,16 @@ def _is_private_method(name): return name.startswith('__') and not name.endswith('__') +def _mangle_private_name(obj, func, name): + qualname = getattr(func, '__qualname__', None) + if qualname is None: + classname = obj.__class__.__name__.lstrip('_') + return '_%s%s' % (classname, name) + else: + splits = qualname.split('.') + return '_%s%s' % (splits[-2], splits[-1]) + + def _find_method(obj, func): if obj: try: @@ -81,13 +91,7 @@ def _find_method(obj, func): if func_self is obj: name = six.get_method_function(func).__name__ if _is_private_method(name): - qualname = getattr(func, '__qualname__', None) - if qualname is None: - classname = obj.__class__.__name__.lstrip('_') - name = '_%s%s' % (classname, name) - else: - splits = qualname.split('.') - name = '_%s%s' % (splits[-2], splits[-1]) + return _mangle_private_name(obj, func, name) return name raise ValueError("Function %s is not a method of: %s" % (func, obj)) diff --git a/tests/test_utils_reqser.py b/tests/test_utils_reqser.py index 31577bc8c..7f9e31daa 100644 --- a/tests/test_utils_reqser.py +++ b/tests/test_utils_reqser.py @@ -2,9 +2,11 @@ import unittest import sys +import six + from scrapy.http import Request, FormRequest from scrapy.spiders import Spider -from scrapy.utils.reqser import request_to_dict, request_from_dict, _is_private_method +from scrapy.utils.reqser import request_to_dict, request_from_dict, _is_private_method, _mangle_private_name class RequestSerializationTest(unittest.TestCase): @@ -105,6 +107,18 @@ class RequestSerializationTest(unittest.TestCase): self.assertFalse(_is_private_method('___')) self.assertFalse(_is_private_method('____')) + def _assert_mangles_to(self, obj, name): + self.assertEqual( + _mangle_private_name(obj, getattr(obj, name), name), + name + ) + + def test_private_name_mangling(self): + self._assert_mangles_to( + self.spider, '_TestSpider__parse_item_private') + self._assert_mangles_to( + self.spider, '_TestSpiderMixin__mixin_callback') + def test_unserializable_callback1(self): r = Request("http://www.example.com", callback=lambda x: x) self.assertRaises(ValueError, request_to_dict, r) From 3dd3e8c29863683d60f9c4f74aacac3103703061 Mon Sep 17 00:00:00 2001 From: Andrew Baxter Date: Wed, 5 Jun 2019 23:49:54 +0900 Subject: [PATCH 387/889] Restrict different class mangling tests to Py 3+ --- tests/test_utils_reqser.py | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/tests/test_utils_reqser.py b/tests/test_utils_reqser.py index 7f9e31daa..57dc5db53 100644 --- a/tests/test_utils_reqser.py +++ b/tests/test_utils_reqser.py @@ -116,8 +116,9 @@ class RequestSerializationTest(unittest.TestCase): def test_private_name_mangling(self): self._assert_mangles_to( self.spider, '_TestSpider__parse_item_private') - self._assert_mangles_to( - self.spider, '_TestSpiderMixin__mixin_callback') + if sys.version_info[0] >= 3: + self._assert_mangles_to( + self.spider, '_TestSpiderMixin__mixin_callback') def test_unserializable_callback1(self): r = Request("http://www.example.com", callback=lambda x: x) From 6af1dc89aa5988ebbfbef90afdafa84736f3993c Mon Sep 17 00:00:00 2001 From: Andrew Baxter Date: Thu, 6 Jun 2019 04:25:19 +0900 Subject: [PATCH 388/889] Fix mangling test --- tests/test_utils_reqser.py | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/tests/test_utils_reqser.py b/tests/test_utils_reqser.py index 57dc5db53..e5a09dcf1 100644 --- a/tests/test_utils_reqser.py +++ b/tests/test_utils_reqser.py @@ -108,8 +108,9 @@ class RequestSerializationTest(unittest.TestCase): self.assertFalse(_is_private_method('____')) def _assert_mangles_to(self, obj, name): + func = getattr(obj, name) self.assertEqual( - _mangle_private_name(obj, getattr(obj, name), name), + _mangle_private_name(obj, func, func.__name__), name ) From 0c50879568dee2363df5cbe25e9bdd7adaed5da4 Mon Sep 17 00:00:00 2001 From: Claudio Salazar Date: Thu, 6 Jun 2019 22:10:59 +0200 Subject: [PATCH 389/889] Change behavior to use method GET when there are unknown methods in the form --- scrapy/http/request/form.py | 2 +- tests/test_http_request.py | 7 ++++--- 2 files changed, 5 insertions(+), 4 deletions(-) diff --git a/scrapy/http/request/form.py b/scrapy/http/request/form.py index 2182b9b53..8b29aae4b 100644 --- a/scrapy/http/request/form.py +++ b/scrapy/http/request/form.py @@ -52,7 +52,7 @@ class FormRequest(Request): method = kwargs.pop('method', form.method).upper() if method not in cls.valid_form_methods: - raise ValueError('Invalid form method in chosen form') + method = 'GET' return cls(url=url, method=method, formdata=formdata, **kwargs) diff --git a/tests/test_http_request.py b/tests/test_http_request.py index 8fdafb286..258b48dce 100644 --- a/tests/test_http_request.py +++ b/tests/test_http_request.py @@ -1107,11 +1107,12 @@ class FormRequestTest(RequestTest): for method in self.request_class.valid_form_methods: response = _buildresponse(body % method) - r1 = self.request_class.from_response(response) - self.assertEqual(r1.method, method) + r = self.request_class.from_response(response) + self.assertEqual(r.method, method) response = _buildresponse(body % 'UNKNOWN') - self.assertRaises(ValueError, self.request_class.from_response, response) + r = self.request_class.from_response(response) + self.assertEqual(r.method, 'GET') def _buildresponse(body, **kwargs): From bd8a10384b462dd56b33668e8b92e4a148fd6fba Mon Sep 17 00:00:00 2001 From: Sortafreel Date: Fri, 7 Jun 2019 01:50:03 +0300 Subject: [PATCH 390/889] Add values (if there're any) when initiating items from dicts https://github.com/scrapy/scrapy/issues/3804 --- scrapy/loader/__init__.py | 2 ++ 1 file changed, 2 insertions(+) diff --git a/scrapy/loader/__init__.py b/scrapy/loader/__init__.py index a7c75a46a..295a8e42d 100644 --- a/scrapy/loader/__init__.py +++ b/scrapy/loader/__init__.py @@ -35,6 +35,8 @@ class ItemLoader(object): self.parent = parent self._local_item = context['item'] = item self._local_values = defaultdict(list) + for field_name, value in item.items(): + self.add_value(field_name, value) @property def _values(self): From 754f52b02781097c8ca6835e057815c7653062d4 Mon Sep 17 00:00:00 2001 From: Sortafreel Date: Fri, 7 Jun 2019 03:20:45 +0300 Subject: [PATCH 391/889] Preprocess values if item built from dict. https://github.com/scrapy/scrapy/issues/3804 --- scrapy/loader/__init__.py | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/scrapy/loader/__init__.py b/scrapy/loader/__init__.py index 295a8e42d..7c7f66866 100644 --- a/scrapy/loader/__init__.py +++ b/scrapy/loader/__init__.py @@ -35,8 +35,9 @@ class ItemLoader(object): self.parent = parent self._local_item = context['item'] = item self._local_values = defaultdict(list) + # Preprocess values if item built from dict for field_name, value in item.items(): - self.add_value(field_name, value) + self._values[field_name] = self._process_input_value(field_name, value) @property def _values(self): From c7ba72b5dc9da3435eb1ec303b991d05ba40ba1c Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Adri=C3=A1n=20Chaves?= Date: Tue, 4 Jun 2019 17:10:14 +0200 Subject: [PATCH 392/889] Skip scrapy.contracts private APIs in the documentation coverage report --- docs/conf.py | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/docs/conf.py b/docs/conf.py index 832626f6b..bf222b361 100644 --- a/docs/conf.py +++ b/docs/conf.py @@ -224,4 +224,17 @@ linkcheck_ignore = [ # Options for the Coverage extension # ---------------------------------- coverage_ignore_pyobjects = [ + # Contract’s add_pre_hook and add_post_hook are not documented because + # they should be transparent to contract developers, for whom pre_hook and + # post_hook should be the actual concern. + r'\bContract\.add_(pre|post)_hook$', + + # ContractsManager is an internal class, developers are not expected to + # interact with it directly in any way. + r'\bContractsManager\b$', + + # For default contracts we only want to document their general purpose in + # their constructor, the methods they reimplement to achieve that purpose + # should be irrelevant to developers using those contracts. + r'\w+Contract\.(adjust_request_args|(pre|post)_process)$', ] From a1bca6a8e722af53241e51bbf758e7bd67671801 Mon Sep 17 00:00:00 2001 From: sortafreel Date: Tue, 11 Jun 2019 07:36:29 +0300 Subject: [PATCH 393/889] Add tests. --- scrapy/loader/__init__.py | 1 + tests/test_loader.py | 65 ++++++++++++++++++++++++++------------- 2 files changed, 45 insertions(+), 21 deletions(-) diff --git a/scrapy/loader/__init__.py b/scrapy/loader/__init__.py index 7c7f66866..20f0f90c3 100644 --- a/scrapy/loader/__init__.py +++ b/scrapy/loader/__init__.py @@ -36,6 +36,7 @@ class ItemLoader(object): self._local_item = context['item'] = item self._local_values = defaultdict(list) # Preprocess values if item built from dict + # Values need to be added to item._values if added them from dict (not with add_values) for field_name, value in item.items(): self._values[field_name] = self._process_input_value(field_name, value) diff --git a/tests/test_loader.py b/tests/test_loader.py index 8b58e4dbd..eb4a01572 100644 --- a/tests/test_loader.py +++ b/tests/test_loader.py @@ -419,6 +419,29 @@ class BasicItemLoaderTest(unittest.TestCase): self.assertEqual(item['url'], u'rabbit.hole') self.assertEqual(item['summary'], u'rabbithole') + def test_create_item_from_dict(self): + class TestItem(Item): + title = Field() + + class TestItemLoader(ItemLoader): + default_item_class = TestItem + + input_item = {'title': 'Test item title 1'} + il = TestItemLoader(item=input_item) + # Getting output value mustn't remove value from item + self.assertEqual(il.load_item(), { + 'title': 'Test item title 1', + }) + self.assertEqual(il.get_output_value('title'), 'Test item title 1') + self.assertEqual(il.load_item(), { + 'title': 'Test item title 1', + }) + + input_item = {'title': 'Test item title 2'} + il = TestItemLoader(item=input_item) + # Values from dict must be added to item _values + self.assertEqual(il._values.get('title'), 'Test item title 2') + class ProcessorsTest(unittest.TestCase): @@ -709,28 +732,28 @@ class SubselectorLoaderTest(unittest.TestCase): class SelectJmesTestCase(unittest.TestCase): - test_list_equals = { - 'simple': ('foo.bar', {"foo": {"bar": "baz"}}, "baz"), - 'invalid': ('foo.bar.baz', {"foo": {"bar": "baz"}}, None), - 'top_level': ('foo', {"foo": {"bar": "baz"}}, {"bar": "baz"}), - 'double_vs_single_quote_string': ('foo.bar', {"foo": {"bar": "baz"}}, "baz"), - 'dict': ( - 'foo.bar[*].name', - {"foo": {"bar": [{"name": "one"}, {"name": "two"}]}}, - ['one', 'two'] - ), - 'list': ('[1]', [1, 2], 2) - } + test_list_equals = { + 'simple': ('foo.bar', {"foo": {"bar": "baz"}}, "baz"), + 'invalid': ('foo.bar.baz', {"foo": {"bar": "baz"}}, None), + 'top_level': ('foo', {"foo": {"bar": "baz"}}, {"bar": "baz"}), + 'double_vs_single_quote_string': ('foo.bar', {"foo": {"bar": "baz"}}, "baz"), + 'dict': ( + 'foo.bar[*].name', + {"foo": {"bar": [{"name": "one"}, {"name": "two"}]}}, + ['one', 'two'] + ), + 'list': ('[1]', [1, 2], 2) + } - def test_output(self): - for l in self.test_list_equals: - expr, test_list, expected = self.test_list_equals[l] - test = SelectJmes(expr)(test_list) - self.assertEqual( - test, - expected, - msg='test "{}" got {} expected {}'.format(l, test, expected) - ) + def test_output(self): + for l in self.test_list_equals: + expr, test_list, expected = self.test_list_equals[l] + test = SelectJmes(expr)(test_list) + self.assertEqual( + test, + expected, + msg='test "{}" got {} expected {}'.format(l, test, expected) + ) if __name__ == "__main__": From 7dad2f7b130c426f2a8aee320ccbc378752a9568 Mon Sep 17 00:00:00 2001 From: sortafreel Date: Tue, 11 Jun 2019 07:43:03 +0300 Subject: [PATCH 394/889] Add more tests. --- tests/test_loader.py | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/tests/test_loader.py b/tests/test_loader.py index eb4a01572..241630ab3 100644 --- a/tests/test_loader.py +++ b/tests/test_loader.py @@ -442,6 +442,20 @@ class BasicItemLoaderTest(unittest.TestCase): # Values from dict must be added to item _values self.assertEqual(il._values.get('title'), 'Test item title 2') + input_item = {'title': [u'Test item title 3', u'Test item 4']} + il = TestItemLoader(item=input_item) + # Same rules must work for lists + self.assertEqual(il._values.get('title'), + [u'Test item title 3', u'Test item 4']) + self.assertEqual(il.load_item(), { + 'title': [u'Test item title 3', u'Test item 4'], + }) + self.assertEqual(il.get_output_value('title'), + [u'Test item title 3', u'Test item 4']) + self.assertEqual(il.load_item(), { + 'title': [u'Test item title 3', u'Test item 4'], + }) + class ProcessorsTest(unittest.TestCase): From 0da972339bb174156b08a3ae34ece7fddea1e48d Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Adri=C3=A1n=20Chaves?= Date: Tue, 11 Jun 2019 14:11:38 +0200 Subject: [PATCH 395/889] Require Twisted<=19.2.0 for Python 3.4 --- setup.py | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/setup.py b/setup.py index bd666e93c..4dc6d18c1 100644 --- a/setup.py +++ b/setup.py @@ -65,7 +65,8 @@ setup( ], python_requires='>=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*', install_requires=[ - 'Twisted>=13.1.0', + 'Twisted>=13.1.0;python_version!="3.4"', + 'Twisted>=13.1.0,<=19.2.0;python_version=="3.4"', 'w3lib>=1.17.0', 'queuelib', 'lxml', From fe0f80f2f422d4047a8b6230d66eb853d443d90b Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Adri=C3=A1n=20Chaves?= Date: Tue, 11 Jun 2019 15:50:41 +0200 Subject: [PATCH 396/889] Set the cloned directory as PYTHONPATH in appveyor.yml --- appveyor.yml | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/appveyor.yml b/appveyor.yml index 93cfd469e..7fd636864 100644 --- a/appveyor.yml +++ b/appveyor.yml @@ -12,7 +12,8 @@ branches: install: - "SET PATH=%PYTHON%;%PYTHON%\\Scripts;%PATH%" - - "SET TOX_TESTENV_PASSENV=HOME USERPROFILE HOMEPATH HOMEDRIVE" + - "SET PYTHONPATH=%APPVEYOR_BUILD_FOLDER%" + - "SET TOX_TESTENV_PASSENV=HOME HOMEDRIVE HOMEPATH PYTHONPATH USERPROFILE" - "pip install -U tox" build: false From cdeccac6d6ccd0034a5f007ed371c1d481b32c26 Mon Sep 17 00:00:00 2001 From: sortafreel Date: Tue, 11 Jun 2019 17:38:06 +0300 Subject: [PATCH 397/889] Linting (return previous indentation). --- tests/test_loader.py | 42 +++++++++++++++++++++--------------------- 1 file changed, 21 insertions(+), 21 deletions(-) diff --git a/tests/test_loader.py b/tests/test_loader.py index 241630ab3..5a8ee1b2e 100644 --- a/tests/test_loader.py +++ b/tests/test_loader.py @@ -746,28 +746,28 @@ class SubselectorLoaderTest(unittest.TestCase): class SelectJmesTestCase(unittest.TestCase): - test_list_equals = { - 'simple': ('foo.bar', {"foo": {"bar": "baz"}}, "baz"), - 'invalid': ('foo.bar.baz', {"foo": {"bar": "baz"}}, None), - 'top_level': ('foo', {"foo": {"bar": "baz"}}, {"bar": "baz"}), - 'double_vs_single_quote_string': ('foo.bar', {"foo": {"bar": "baz"}}, "baz"), - 'dict': ( - 'foo.bar[*].name', - {"foo": {"bar": [{"name": "one"}, {"name": "two"}]}}, - ['one', 'two'] - ), - 'list': ('[1]', [1, 2], 2) - } + test_list_equals = { + 'simple': ('foo.bar', {"foo": {"bar": "baz"}}, "baz"), + 'invalid': ('foo.bar.baz', {"foo": {"bar": "baz"}}, None), + 'top_level': ('foo', {"foo": {"bar": "baz"}}, {"bar": "baz"}), + 'double_vs_single_quote_string': ('foo.bar', {"foo": {"bar": "baz"}}, "baz"), + 'dict': ( + 'foo.bar[*].name', + {"foo": {"bar": [{"name": "one"}, {"name": "two"}]}}, + ['one', 'two'] + ), + 'list': ('[1]', [1, 2], 2) + } - def test_output(self): - for l in self.test_list_equals: - expr, test_list, expected = self.test_list_equals[l] - test = SelectJmes(expr)(test_list) - self.assertEqual( - test, - expected, - msg='test "{}" got {} expected {}'.format(l, test, expected) - ) + def test_output(self): + for l in self.test_list_equals: + expr, test_list, expected = self.test_list_equals[l] + test = SelectJmes(expr)(test_list) + self.assertEqual( + test, + expected, + msg='test "{}" got {} expected {}'.format(l, test, expected) + ) if __name__ == "__main__": From b8900ec6a698cb4e27424de57ca5593f1c7300e7 Mon Sep 17 00:00:00 2001 From: Anubhav Patel Date: Mon, 17 Jun 2019 00:06:44 +0530 Subject: [PATCH 398/889] removes unused var --- tests/test_downloadermiddleware.py | 3 --- 1 file changed, 3 deletions(-) diff --git a/tests/test_downloadermiddleware.py b/tests/test_downloadermiddleware.py index 0f420b70d..03564e748 100644 --- a/tests/test_downloadermiddleware.py +++ b/tests/test_downloadermiddleware.py @@ -123,7 +123,6 @@ class ProcessRequestInvalidOutput(ManagerTestCase): def test_invalid_process_request(self): req = Request('http://example.com/index.html') - resp = Response('http://example.com/index.html') class InvalidProcessRequestMiddleware: def process_request(self, request, spider): @@ -143,7 +142,6 @@ class ProcessResponseInvalidOutput(ManagerTestCase): def test_invalid_process_response(self): req = Request('http://example.com/index.html') - resp = Response('http://example.com/index.html') class InvalidProcessResponseMiddleware: def process_response(self, request, response, spider): @@ -163,7 +161,6 @@ class ProcessExceptionInvalidOutput(ManagerTestCase): def test_invalid_process_exception(self): req = Request('http://example.com/index.html') - resp = Response('http://example.com/index.html') class InvalidProcessExceptionMiddleware: def process_request(self, request, spider): From 8d1e0e09bb6fdeb4f1348b408a268c92dc9e7a8f Mon Sep 17 00:00:00 2001 From: Mabel Villalba Date: Thu, 20 Jun 2019 10:06:06 +0200 Subject: [PATCH 399/889] [itemloader-errors] added error message in get_value --- scrapy/loader/__init__.py | 12 +++++++++--- 1 file changed, 9 insertions(+), 3 deletions(-) diff --git a/scrapy/loader/__init__.py b/scrapy/loader/__init__.py index 20f0f90c3..5055de015 100644 --- a/scrapy/loader/__init__.py +++ b/scrapy/loader/__init__.py @@ -106,11 +106,17 @@ class ItemLoader(object): value = arg_to_iter(value) value = flatten(extract_regex(regex, x) for x in value) - for proc in processors: + for _proc in processors: if value is None: break - proc = wrap_loader_context(proc, self.context) - value = proc(value) + proc = wrap_loader_context(_proc, self.context) + try: + value = proc(value) + except Exception as e: + raise ValueError( + "Error with processor %s value=%r error='%s: %s'" % + (_proc.__class__.__name__, value, type(e).__name__, + str(e))) return value def load_item(self): From 663352b2a5250c377bbbe2d53c5d5b7da3a1836a Mon Sep 17 00:00:00 2001 From: Mabel Villalba Date: Thu, 20 Jun 2019 10:10:16 +0200 Subject: [PATCH 400/889] [itemloader-errors] added error message to _process_input_value --- scrapy/loader/__init__.py | 12 +++++++++--- 1 file changed, 9 insertions(+), 3 deletions(-) diff --git a/scrapy/loader/__init__.py b/scrapy/loader/__init__.py index 5055de015..fc8b10bee 100644 --- a/scrapy/loader/__init__.py +++ b/scrapy/loader/__init__.py @@ -155,9 +155,15 @@ class ItemLoader(object): return proc def _process_input_value(self, field_name, value): - proc = self.get_input_processor(field_name) - proc = wrap_loader_context(proc, self.context) - return proc(value) + _proc = self.get_input_processor(field_name) + proc = wrap_loader_context(_proc, self.context) + try: + return proc(value) + except Exception as e: + raise ValueError( + "Error with inputput processor %s: field=%r value=%r " + "error='%s: %s'" % (_proc.__class__.__name__, field_name, + value, type(e).__name__, str(e))) def _get_item_field_attr(self, field_name, key, default=None): if isinstance(self.item, Item): From f4f2b1695c4d7bc69e5cb19c33a3a47f69bd1e8d Mon Sep 17 00:00:00 2001 From: Victor Torres Date: Mon, 24 Jun 2019 07:38:05 -0300 Subject: [PATCH 401/889] Fix a memory leak on the Media Pipeline (Files and Images) (#3813) We're storing exceptions captured by Twisted on the media pipeline cache, but we're also using the defer.returnValue method with our own methods decorated with @defer.inlineCallbacks. The defer.returnValue method passes returned values forward by throwing a defer._DefGen_Return exception, which in its turn extends the BaseException class and is captured by Twisted. This way, the latest exception stored in the Failure's object may also have an HtmlResponse object in its __context__ attribute. As the Response object also keeps track of the Request object that has originated it, you could figure it out how many RAM we're wasting here. This could easily lead to a Memory Leak problem when running spiders with Media Pipeline enabled and a particular Request set that tends to raise a significant number of exceptions. Example triggers: - media requests with 404 status responses - user land exceptins coming from custom middlewares - etc. --- scrapy/pipelines/media.py | 26 +++++++++++- tests/test_pipeline_media.py | 77 +++++++++++++++++++++++++++++++++++- 2 files changed, 101 insertions(+), 2 deletions(-) diff --git a/scrapy/pipelines/media.py b/scrapy/pipelines/media.py index 404bbf5bf..95dca9a3f 100644 --- a/scrapy/pipelines/media.py +++ b/scrapy/pipelines/media.py @@ -3,7 +3,7 @@ from __future__ import print_function import functools import logging from collections import defaultdict -from twisted.internet.defer import Deferred, DeferredList +from twisted.internet.defer import Deferred, DeferredList, _DefGen_Return from twisted.python.failure import Failure from scrapy.settings import Settings @@ -139,6 +139,30 @@ class MediaPipeline(object): result.cleanFailure() result.frames = [] result.stack = None + + # This code fixes a memory leak by avoiding to keep references to + # the Request and Response objects on the Media Pipeline cache. + # + # Twisted inline callbacks pass return values using the function + # twisted.internet.defer.returnValue, which encapsulates the return + # value inside a _DefGen_Return base exception. + # + # What happens when the media_downloaded callback raises another + # exception, for example a FileException('download-error') when + # the Response status code is not 200 OK, is that it stores the + # _DefGen_Return exception on the FileException context. + # + # To avoid keeping references to the Response and therefore Request + # objects on the Media Pipeline cache, we should wipe the context of + # the exception encapsulated by the Twisted Failure when its a + # _DefGen_Return instance. + # + # This problem does not occur in Python 2.7 since we don't have + # Exception Chaining (https://www.python.org/dev/peps/pep-3134/). + context = getattr(result.value, '__context__', None) + if isinstance(context, _DefGen_Return): + setattr(result.value, '__context__', None) + info.downloading.remove(fp) info.downloaded[fp] = result # cache result for wad in info.waiting.pop(fp): diff --git a/tests/test_pipeline_media.py b/tests/test_pipeline_media.py index 5f6a6d9e6..28e39cefa 100644 --- a/tests/test_pipeline_media.py +++ b/tests/test_pipeline_media.py @@ -1,15 +1,19 @@ from __future__ import print_function + +import sys + from testfixtures import LogCapture from twisted.trial import unittest from twisted.python.failure import Failure from twisted.internet import reactor -from twisted.internet.defer import Deferred, inlineCallbacks +from twisted.internet.defer import Deferred, inlineCallbacks, returnValue from scrapy.http import Request, Response from scrapy.settings import Settings from scrapy.spiders import Spider from scrapy.utils.request import request_fingerprint from scrapy.pipelines.media import MediaPipeline +from scrapy.pipelines.files import FileException from scrapy.utils.log import failure_to_exc_info from scrapy.utils.signal import disconnect_all from scrapy import signals @@ -90,6 +94,77 @@ class BaseMediaPipelineTestCase(unittest.TestCase): self.pipe._modify_media_request(request) assert request.meta == {'handle_httpstatus_all': True} + def test_should_remove_req_res_references_before_caching_the_results(self): + """Regression test case to prevent a memory leak in the Media Pipeline. + + The memory leak is triggered when an exception is raised when a Response + scheduled by the Media Pipeline is being returned. For example, when a + FileException('download-error') is raised because the Response status + code is not 200 OK. + + It happens because we are keeping a reference to the Response object + inside the FileException context. This is caused by the way Twisted + return values from inline callbacks. It raises a custom exception + encapsulating the original return value. + + The solution is to remove the exception context when this context is a + _DefGen_Return instance, the BaseException used by Twisted to pass the + returned value from those inline callbacks. + + Maybe there's a better and more reliable way to test the case described + here, but it would be more complicated and involve running - or at least + mocking - some async steps from the Media Pipeline. The current test + case is simple and detects the problem very fast. On the other hand, it + would not detect another kind of leak happening due to old object + references being kept inside the Media Pipeline cache. + + This problem does not occur in Python 2.7 since we don't have Exception + Chaining (https://www.python.org/dev/peps/pep-3134/). + """ + # Create sample pair of Request and Response objects + request = Request('http://url') + response = Response('http://url', body=b'', request=request) + + # Simulate the Media Pipeline behavior to produce a Twisted Failure + try: + # Simulate a Twisted inline callback returning a Response + # The returnValue method raises an exception encapsulating the value + returnValue(response) + except BaseException as exc: + def_gen_return_exc = exc + try: + # Simulate the media_downloaded callback raising a FileException + # This usually happens when the status code is not 200 OK + raise FileException('download-error') + except Exception as exc: + file_exc = exc + # Simulate Twisted capturing the FileException + # It encapsulates the exception inside a Twisted Failure + failure = Failure(file_exc) + + # The Failure should encapsulate a FileException ... + self.assertEqual(failure.value, file_exc) + # ... and if we're running on Python 3 ... + if sys.version_info.major >= 3: + # ... it should have the returnValue exception set as its context + self.assertEqual(failure.value.__context__, def_gen_return_exc) + + # Let's calculate the request fingerprint and fake some runtime data... + fp = request_fingerprint(request) + info = self.pipe.spiderinfo + info.downloading.add(fp) + info.waiting[fp] = [] + + # When calling the method that caches the Request's result ... + self.pipe._cache_result_and_execute_waiters(failure, fp, info) + # ... it should store the Twisted Failure ... + self.assertEqual(info.downloaded[fp], failure) + # ... encapsulating the original FileException ... + self.assertEqual(info.downloaded[fp].value, file_exc) + # ... but it should not store the returnValue exception on its context + context = getattr(info.downloaded[fp].value, '__context__', None) + self.assertIsNone(context) + class MockedMediaPipeline(MediaPipeline): From 8a3b15eb91169ab262e4dca60105f56467ecd1ff Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Adri=C3=A1n=20Chaves?= Date: Wed, 27 Mar 2019 08:50:33 +0100 Subject: [PATCH 402/889] Document how to select dynamically-loaded content --- docs/index.rst | 4 + docs/topics/dynamic-content.rst | 246 ++++++++++++++++++++++++++++++++ 2 files changed, 250 insertions(+) create mode 100644 docs/topics/dynamic-content.rst diff --git a/docs/index.rst b/docs/index.rst index cedde8f38..6d5f9e77d 100644 --- a/docs/index.rst +++ b/docs/index.rst @@ -158,6 +158,7 @@ Solving specific problems topics/practices topics/broad-crawls topics/developer-tools + topics/dynamic-content topics/leaks topics/media-pipeline topics/deploy @@ -183,6 +184,9 @@ Solving specific problems :doc:`topics/developer-tools` Learn how to scrape with your browser's developer tools. +:doc:`topics/dynamic-content` + Read webpage data that is loaded dynamically. + :doc:`topics/leaks` Learn how to find and get rid of memory leaks in your crawler. diff --git a/docs/topics/dynamic-content.rst b/docs/topics/dynamic-content.rst new file mode 100644 index 000000000..8b5dacf56 --- /dev/null +++ b/docs/topics/dynamic-content.rst @@ -0,0 +1,246 @@ +.. _topics-dynamic-content: + +==================================== +Selecting dynamically-loaded content +==================================== + +Some webpages show the desired data when you load them in a web browser. +However, when you download them using Scrapy, you cannot reach the desired data +using :ref:`selectors `. + +When this happens, the recommended approach is to +:ref:`find the data source ` and extract the data +from it. + +If you fail to do that, and you can nonetheless access the desired data through +the :ref:`DOM ` from your web browser, see +:ref:`topics-javascript-rendering`. + +.. _topics-finding-data-source: + +Finding the data source +======================= + +To extract the desired data, you must first find its source location. + +If the data is in a non-text-based format, such as an image or a PDF document, +use the :ref:`network tool ` of your web browser to find +the corresponding request, and :ref:`reproduce it +`. + +If your web browser lets you select the desired data as text, the data may be +defined in embedded JavaScript code, or loaded from an external resource in a +text-based format. + +In that case, you can use a tool like wgrep_ to find the URL of that resource. + +If the data turns out to come from the original URL itself, you must +:ref:`inspect the source code of the webpage ` to +determine where the data is located. + +If the data comes from a different URL, you will need to :ref:`reproduce the +corresponding request `. + +.. _topics-inspecting-source: + +Inspecting the source code of a webpage +======================================= + +Sometimes you need to inspect the source code of a webpage (not the +:ref:`DOM `) to determine where some desired data is located. + +Use Scrapy’s :command:`fetch` command to download the webpage contents as seen +by Scrapy:: + + scrapy fetch --nolog https://example.com > response.html + +If the desired data is in embedded JavaScript code within a ``