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Release notes

Scrapy 2.7.1 (2022-11-02)

New features

Relaxed the restriction introduced in 2.6.2 so that the Proxy-Authentication header can again be set explicitly, as long as the proxy URL in the :reqmeta:`proxy` metadata has no other credentials, and for as long as that proxy URL remains the same; this restores compatibility with scrapy-zyte-smartproxy 2.1.0 and older (:issue:`5626`).

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Bug fixes

Using -O/--overwrite-output and -t/--output-format options together now produces an error instead of ignoring the former option (:issue:`5516`, :issue:`5605`).

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Replaced deprecated :mod:`asyncio` APIs that implicitly use the current event loop with code that explicitly requests a loop from the event loop policy (:issue:`5685`, :issue:`5689`).

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Fixed uses of deprecated Scrapy APIs in Scrapy itself (:issue:`5588`, :issue:`5589`).

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Fixed uses of a deprecated Pillow API (:issue:`5684`, :issue:`5692`).

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Improved code that checks if generators return values, so that it no longer fails on decorated methods and partial methods (:issue:`5323`, :issue:`5592`, :issue:`5599`, :issue:`5691`).

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Documentation

Upgraded the Code of Conduct to Contributor Covenant v2.1 (:issue:`5698`).

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Fixed typos (:issue:`5681`, :issue:`5694`).

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Quality assurance

Re-enabled some erroneously disabled flake8 checks (:issue:`5688`).

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Ignored harmless deprecation warnings from :mod:`typing` in tests (:issue:`5686`, :issue:`5697`).

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Modernized our CI configuration (:issue:`5695`, :issue:`5696`).

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Scrapy 2.7.0 (2022-10-17)

Highlights:

Added Python 3.11 support, dropped Python 3.6 support
Improved support for :ref:`asynchronous callbacks <topics-coroutines>`

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:ref:`Asyncio support <using-asyncio>` is enabled by default on new projects

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Output names of item fields can now be arbitrary strings
Centralized :ref:`request fingerprinting <request-fingerprints>` configuration is now possible

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Modified requirements

Python 3.7 or greater is now required; support for Python 3.6 has been dropped. Support for the upcoming Python 3.11 has been added.

The minimum required version of some dependencies has changed as well:

lxml: 3.5.0 → 4.3.0
Pillow (:ref:`images pipeline <images-pipeline>`): 4.0.0 → 7.1.0

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zope.interface: 5.0.0 → 5.1.0

(:issue:`5512`, :issue:`5514`, :issue:`5524`, :issue:`5563`, :issue:`5664`, :issue:`5670`, :issue:`5678`)

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Deprecations

:meth:`ImagesPipeline.thumb_path <scrapy.pipelines.images.ImagesPipeline.thumb_path>` must now accept an item parameter (:issue:`5504`, :issue:`5508`).

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The scrapy.downloadermiddlewares.decompression module is now deprecated (:issue:`5546`, :issue:`5547`).

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New features

The :meth:`~scrapy.spidermiddlewares.SpiderMiddleware.process_spider_output` method of :ref:`spider middlewares <topics-spider-middleware>` can now be defined as an :term:`asynchronous generator` (:issue:`4978`).

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The output of :class:`~scrapy.Request` callbacks defined as :ref:`coroutines <topics-coroutines>` is now processed asynchronously (:issue:`4978`).

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:class:`~scrapy.spiders.crawl.CrawlSpider` now supports :ref:`asynchronous callbacks <topics-coroutines>` (:issue:`5657`).

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New projects created with the :command:`startproject` command have :ref:`asyncio support <using-asyncio>` enabled by default (:issue:`5590`, :issue:`5679`).

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The :setting:`FEED_EXPORT_FIELDS` setting can now be defined as a dictionary to customize the output name of item fields, lifting the restriction that required output names to be valid Python identifiers, e.g. preventing them to have whitespace (:issue:`1008`, :issue:`3266`, :issue:`3696`).

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You can now customize :ref:`request fingerprinting <request-fingerprints>` through the new :setting:`REQUEST_FINGERPRINTER_CLASS` setting, instead of having to change it on every Scrapy component that relies on request fingerprinting (:issue:`900`, :issue:`3420`, :issue:`4113`, :issue:`4762`, :issue:`4524`).

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jsonl is now supported and encouraged as a file extension for JSON Lines files (:issue:`4848`).

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:meth:`ImagesPipeline.thumb_path <scrapy.pipelines.images.ImagesPipeline.thumb_path>` now receives the source :ref:`item <topics-items>` (:issue:`5504`, :issue:`5508`).

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Bug fixes

When using Google Cloud Storage with a :ref:`media pipeline <topics-media-pipeline>`, :setting:`FILES_EXPIRES` now also works when :setting:`FILES_STORE` does not point at the root of your Google Cloud Storage bucket (:issue:`5317`, :issue:`5318`).

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The :command:`parse` command now supports :ref:`asynchronous callbacks <topics-coroutines>` (:issue:`5424`, :issue:`5577`).

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When using the :command:`parse` command with a URL for which there is no available spider, an exception is no longer raised (:issue:`3264`, :issue:`3265`, :issue:`5375`, :issue:`5376`, :issue:`5497`).

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:class:`~scrapy.http.TextResponse` now gives higher priority to the byte order mark when determining the text encoding of the response body, following the HTML living standard (:issue:`5601`, :issue:`5611`).

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MIME sniffing takes the response body into account in FTP and HTTP/1.0 requests, as well as in cached requests (:issue:`4873`).

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MIME sniffing now detects valid HTML 5 documents even if the html tag is missing (:issue:`4873`).

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An exception is now raised if :setting:`ASYNCIO_EVENT_LOOP` has a value that does not match the asyncio event loop actually installed (:issue:`5529`).

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Fixed :meth:`Headers.getlist <scrapy.http.headers.Headers.getlist>` returning only the last header (:issue:`5515`, :issue:`5526`).

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Fixed :class:`LinkExtractor <scrapy.linkextractors.lxmlhtml.LxmlLinkExtractor>` not ignoring the tar.gz file extension by default (:issue:`1837`, :issue:`2067`, :issue:`4066`)

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Documentation

Clarified the return type of :meth:`Spider.parse <scrapy.Spider.parse>` (:issue:`5602`, :issue:`5608`).

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To enable :class:`~scrapy.downloadermiddlewares.httpcompression.HttpCompressionMiddleware` to do brotli compression, installing brotli is now recommended instead of installing brotlipy, as the former provides a more recent version of brotli.

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:ref:`Signal documentation <topics-signals>` now mentions :ref:`coroutine support <topics-coroutines>` and uses it in code examples (:issue:`4852`, :issue:`5358`).

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:ref:`bans` now recommends Common Crawl instead of Google cache (:issue:`3582`, :issue:`5432`).

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The new :ref:`topics-components` topic covers enforcing requirements on Scrapy components, like :ref:`downloader middlewares <topics-downloader-middleware>`, :ref:`extensions <topics-extensions>`, :ref:`item pipelines <topics-item-pipeline>`, :ref:`spider middlewares <topics-spider-middleware>`, and more; :ref:`enforce-asyncio-requirement` has also been added (:issue:`4978`).

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:ref:`topics-settings` now indicates that setting values must be :ref:`picklable <pickle-picklable>` (:issue:`5607`, :issue:`5629`).

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Removed outdated documentation (:issue:`5446`, :issue:`5373`, :issue:`5369`, :issue:`5370`, :issue:`5554`).

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Fixed typos (:issue:`5442`, :issue:`5455`, :issue:`5457`, :issue:`5461`, :issue:`5538`, :issue:`5553`, :issue:`5558`, :issue:`5624`, :issue:`5631`).

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Fixed other issues (:issue:`5283`, :issue:`5284`, :issue:`5559`, :issue:`5567`, :issue:`5648`, :issue:`5659`, :issue:`5665`).

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Quality assurance

Added a continuous integration job to run twine check (:issue:`5655`, :issue:`5656`).

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Addressed test issues and warnings (:issue:`5560`, :issue:`5561`, :issue:`5612`, :issue:`5617`, :issue:`5639`, :issue:`5645`, :issue:`5662`, :issue:`5671`, :issue:`5675`).

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Cleaned up code (:issue:`4991`, :issue:`4995`, :issue:`5451`, :issue:`5487`, :issue:`5542`, :issue:`5667`, :issue:`5668`, :issue:`5672`).

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Applied minor code improvements (:issue:`5661`).

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Scrapy 2.6.3 (2022-09-27)

Added support for pyOpenSSL 22.1.0, removing support for SSLv3 (:issue:`5634`, :issue:`5635`, :issue:`5636`).

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Upgraded the minimum versions of the following dependencies:
- cryptography: 2.0 → 3.3
- pyOpenSSL: 16.2.0 → 21.0.0
- service_identity: 16.0.0 → 18.1.0
- Twisted: 17.9.0 → 18.9.0
- zope.interface: 4.1.3 → 5.0.0
(:issue:`5621`, :issue:`5632`)

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Fixes test and documentation issues (:issue:`5612`, :issue:`5617`, :issue:`5631`).

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Scrapy 2.6.2 (2022-07-25)

Security bug fix:

When :class:`~scrapy.downloadermiddlewares.httpproxy.HttpProxyMiddleware` processes a request with :reqmeta:`proxy` metadata, and that :reqmeta:`proxy` metadata includes proxy credentials, :class:`~scrapy.downloadermiddlewares.httpproxy.HttpProxyMiddleware` sets the Proxy-Authentication header, but only if that header is not already set.

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There are third-party proxy-rotation downloader middlewares that set different :reqmeta:`proxy` metadata every time they process a request.

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Because of request retries and redirects, the same request can be processed by downloader middlewares more than once, including both :class:`~scrapy.downloadermiddlewares.httpproxy.HttpProxyMiddleware` and any third-party proxy-rotation downloader middleware.

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These third-party proxy-rotation downloader middlewares could change the :reqmeta:`proxy` metadata of a request to a new value, but fail to remove the Proxy-Authentication header from the previous value of the :reqmeta:`proxy` metadata, causing the credentials of one proxy to be sent to a different proxy.

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To prevent the unintended leaking of proxy credentials, the behavior of :class:`~scrapy.downloadermiddlewares.httpproxy.HttpProxyMiddleware` is now as follows when processing a request:

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- If the request being processed defines :reqmeta:`proxy` metadata that includes credentials, the Proxy-Authorization header is always updated to feature those credentials.
  
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- If the request being processed defines :reqmeta:`proxy` metadata without credentials, the Proxy-Authorization header is removed unless it was originally defined for the same proxy URL.
  
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- If the request has no :reqmeta:`proxy` metadata, or that metadata is a falsy value (e.g. None), the Proxy-Authorization header is removed.
  
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  It is no longer possible to set a proxy URL through the :reqmeta:`proxy` metadata but set the credentials through the Proxy-Authorization header. Set proxy credentials through the :reqmeta:`proxy` metadata instead.
  
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Also fixes the following regressions introduced in 2.6.0:

:class:`~scrapy.crawler.CrawlerProcess` supports again crawling multiple spiders (:issue:`5435`, :issue:`5436`)

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Installing a Twisted reactor before Scrapy does (e.g. importing :mod:`twisted.internet.reactor` somewhere at the module level) no longer prevents Scrapy from starting, as long as a different reactor is not specified in :setting:`TWISTED_REACTOR` (:issue:`5525`, :issue:`5528`)

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Fixed an exception that was being logged after the spider finished under certain conditions (:issue:`5437`, :issue:`5440`)

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The --output/-o command-line parameter supports again a value starting with a hyphen (:issue:`5444`, :issue:`5445`)

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The scrapy parse -h command no longer throws an error (:issue:`5481`, :issue:`5482`)

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Scrapy 2.6.1 (2022-03-01)

Fixes a regression introduced in 2.6.0 that would unset the request method when following redirects.

Scrapy 2.6.0 (2022-03-01)

Highlights:

:ref:`Security fixes for cookie handling <2.6-security-fixes>`

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Python 3.10 support
:ref:`asyncio support <using-asyncio>` is no longer considered experimental, and works out-of-the-box on Windows regardless of your Python version

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Feed exports now support :class:`pathlib.Path` output paths and per-feed :ref:`item filtering <item-filter>` and :ref:`post-processing <post-processing>`

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Security bug fixes

When a :class:`~scrapy.http.Request` object with cookies defined gets a redirect response causing a new :class:`~scrapy.http.Request` object to be scheduled, the cookies defined in the original :class:`~scrapy.http.Request` object are no longer copied into the new :class:`~scrapy.http.Request` object.

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If you manually set the Cookie header on a :class:`~scrapy.http.Request` object and the domain name of the redirect URL is not an exact match for the domain of the URL of the original :class:`~scrapy.http.Request` object, your Cookie header is now dropped from the new :class:`~scrapy.http.Request` object.

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The old behavior could be exploited by an attacker to gain access to your cookies. Please, see the cjvr-mfj7-j4j8 security advisory for more information.

Note

It is still possible to enable the sharing of cookies between different domains with a shared domain suffix (e.g. example.com and any subdomain) by defining the shared domain suffix (e.g. example.com) as the cookie domain when defining your cookies. See the documentation of the :class:`~scrapy.http.Request` class for more information.

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When the domain of a cookie, either received in the Set-Cookie header of a response or defined in a :class:`~scrapy.http.Request` object, is set to a public suffix, the cookie is now ignored unless the cookie domain is the same as the request domain.

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The old behavior could be exploited by an attacker to inject cookies from a controlled domain into your cookiejar that could be sent to other domains not controlled by the attacker. Please, see the mfjm-vh54-3f96 security advisory for more information.

Modified requirements

The h2 dependency is now optional, only needed to :ref:`enable HTTP/2 support <http2>`. (:issue:`5113`)

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Backward-incompatible changes

The formdata parameter of :class:`~scrapy.FormRequest`, if specified for a non-POST request, now overrides the URL query string, instead of being appended to it. (:issue:`2919`, :issue:`3579`)

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When a function is assigned to the :setting:`FEED_URI_PARAMS` setting, now the return value of that function, and not the params input parameter, will determine the feed URI parameters, unless that return value is None. (:issue:`4962`, :issue:`4966`)

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In :class:`scrapy.core.engine.ExecutionEngine`, methods :meth:`~scrapy.core.engine.ExecutionEngine.crawl`, :meth:`~scrapy.core.engine.ExecutionEngine.download`, :meth:`~scrapy.core.engine.ExecutionEngine.schedule`, and :meth:`~scrapy.core.engine.ExecutionEngine.spider_is_idle` now raise :exc:`RuntimeError` if called before :meth:`~scrapy.core.engine.ExecutionEngine.open_spider`. (:issue:`5090`)

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These methods used to assume that :attr:`ExecutionEngine.slot <scrapy.core.engine.ExecutionEngine.slot>` had been defined by a prior call to :meth:`~scrapy.core.engine.ExecutionEngine.open_spider`, so they were raising :exc:`AttributeError` instead.

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If the API of the configured :ref:`scheduler <topics-scheduler>` does not meet expectations, :exc:`TypeError` is now raised at startup time. Before, other exceptions would be raised at run time. (:issue:`3559`)

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The _encoding field of serialized :class:`~scrapy.http.Request` objects is now named encoding, in line with all other fields (:issue:`5130`)

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Deprecation removals

scrapy.http.TextResponse.body_as_unicode, deprecated in Scrapy 2.2, has now been removed. (:issue:`5393`)

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scrapy.item.BaseItem, deprecated in Scrapy 2.2, has now been removed. (:issue:`5398`)

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scrapy.item.DictItem, deprecated in Scrapy 1.8, has now been removed. (:issue:`5398`)

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scrapy.Spider.make_requests_from_url, deprecated in Scrapy 1.4, has now been removed. (:issue:`4178`, :issue:`4356`)

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Deprecations

When a function is assigned to the :setting:`FEED_URI_PARAMS` setting, returning None or modifying the params input parameter is now deprecated. Return a new dictionary instead. (:issue:`4962`, :issue:`4966`)

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:mod:`scrapy.utils.reqser` is deprecated. (:issue:`5130`)

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- Instead of :func:`~scrapy.utils.reqser.request_to_dict`, use the new :meth:`Request.to_dict <scrapy.http.Request.to_dict>` method.
  
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- Instead of :func:`~scrapy.utils.reqser.request_from_dict`, use the new :func:`scrapy.utils.request.request_from_dict` function.
  
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In :mod:`scrapy.squeues`, the following queue classes are deprecated: :class:`~scrapy.squeues.PickleFifoDiskQueueNonRequest`, :class:`~scrapy.squeues.PickleLifoDiskQueueNonRequest`, :class:`~scrapy.squeues.MarshalFifoDiskQueueNonRequest`, and :class:`~scrapy.squeues.MarshalLifoDiskQueueNonRequest`. You should instead use: :class:`~scrapy.squeues.PickleFifoDiskQueue`, :class:`~scrapy.squeues.PickleLifoDiskQueue`, :class:`~scrapy.squeues.MarshalFifoDiskQueue`, and :class:`~scrapy.squeues.MarshalLifoDiskQueue`. (:issue:`5117`)

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Many aspects of :class:`scrapy.core.engine.ExecutionEngine` that come from a time when this class could handle multiple :class:`~scrapy.Spider` objects at a time have been deprecated. (:issue:`5090`)

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- The :meth:`~scrapy.core.engine.ExecutionEngine.has_capacity` method is deprecated.
  
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- The :attr:`~scrapy.core.engine.ExecutionEngine.open_spiders` attribute is deprecated, use :attr:`~scrapy.core.engine.ExecutionEngine.spider` instead.
  
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- The spider parameter is deprecated for the following methods:
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New features

You can now use :ref:`item filtering <item-filter>` to control which items are exported to each output feed. (:issue:`4575`, :issue:`5178`, :issue:`5161`, :issue:`5203`)

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You can now apply :ref:`post-processing <post-processing>` to feeds, and :ref:`built-in post-processing plugins <builtin-plugins>` are provided for output file compression. (:issue:`2174`, :issue:`5168`, :issue:`5190`)

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The :setting:`FEEDS` setting now supports :class:`pathlib.Path` objects as keys. (:issue:`5383`, :issue:`5384`)

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Enabling :ref:`asyncio <using-asyncio>` while using Windows and Python 3.8 or later will automatically switch the asyncio event loop to one that allows Scrapy to work. See :ref:`asyncio-windows`. (:issue:`4976`, :issue:`5315`)

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The :command:`genspider` command now supports a start URL instead of a domain name. (:issue:`4439`)

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:mod:`scrapy.utils.defer` gained 2 new functions, :func:`~scrapy.utils.defer.deferred_to_future` and :func:`~scrapy.utils.defer.maybe_deferred_to_future`, to help :ref:`await on Deferreds when using the asyncio reactor <asyncio-await-dfd>`. (:issue:`5288`)

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:ref:`Amazon S3 feed export storage <topics-feed-storage-s3>` gained support for temporary security credentials (:setting:`AWS_SESSION_TOKEN`) and endpoint customization (:setting:`AWS_ENDPOINT_URL`). (:issue:`4998`, :issue:`5210`)

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New :setting:`LOG_FILE_APPEND` setting to allow truncating the log file. (:issue:`5279`)

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:attr:`Request.cookies <scrapy.Request.cookies>` values that are :class:`bool`, :class:`float` or :class:`int` are cast to :class:`str`. (:issue:`5252`, :issue:`5253`)

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You may now raise :exc:`~scrapy.exceptions.CloseSpider` from a handler of the :signal:`spider_idle` signal to customize the reason why the spider is stopping. (:issue:`5191`)

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When using :class:`~scrapy.downloadermiddlewares.httpproxy.HttpProxyMiddleware`, the proxy URL for non-HTTPS HTTP/1.1 requests no longer needs to include a URL scheme. (:issue:`4505`, :issue:`4649`)

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All built-in queues now expose a peek method that returns the next queue object (like pop) but does not remove the returned object from the queue. (:issue:`5112`)

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If the underlying queue does not support peeking (e.g. because you are not using queuelib 1.6.1 or later), the peek method raises :exc:`NotImplementedError`.

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:class:`~scrapy.http.Request` and :class:`~scrapy.http.Response` now have an attributes attribute that makes subclassing easier. For :class:`~scrapy.http.Request`, it also allows subclasses to work with :func:`scrapy.utils.request.request_from_dict`. (:issue:`1877`, :issue:`5130`, :issue:`5218`)

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The :meth:`~scrapy.core.scheduler.BaseScheduler.open` and :meth:`~scrapy.core.scheduler.BaseScheduler.close` methods of the :ref:`scheduler <topics-scheduler>` are now optional. (:issue:`3559`)

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HTTP/1.1 :exc:`~scrapy.core.downloader.handlers.http11.TunnelError` exceptions now only truncate response bodies longer than 1000 characters, instead of those longer than 32 characters, making it easier to debug such errors. (:issue:`4881`, :issue:`5007`)

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:class:`~scrapy.loader.ItemLoader` now supports non-text responses. (:issue:`5145`, :issue:`5269`)

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Bug fixes

The :setting:`TWISTED_REACTOR` and :setting:`ASYNCIO_EVENT_LOOP` settings are no longer ignored if defined in :attr:`~scrapy.Spider.custom_settings`. (:issue:`4485`, :issue:`5352`)

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Removed a module-level Twisted reactor import that could prevent :ref:`using the asyncio reactor <using-asyncio>`. (:issue:`5357`)

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The :command:`startproject` command works with existing folders again. (:issue:`4665`, :issue:`4676`)

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The :setting:`FEED_URI_PARAMS` setting now behaves as documented. (:issue:`4962`, :issue:`4966`)

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:attr:`Request.cb_kwargs <scrapy.Request.cb_kwargs>` once again allows the callback keyword. (:issue:`5237`, :issue:`5251`, :issue:`5264`)

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Made :func:`scrapy.utils.response.open_in_browser` support more complex HTML. (:issue:`5319`, :issue:`5320`)

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Fixed :attr:`CSVFeedSpider.quotechar <scrapy.spiders.CSVFeedSpider.quotechar>` being interpreted as the CSV file encoding. (:issue:`5391`, :issue:`5394`)

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Added missing setuptools to the list of dependencies. (:issue:`5122`)

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:class:`LinkExtractor <scrapy.linkextractors.lxmlhtml.LxmlLinkExtractor>` now also works as expected with links that have comma-separated rel attribute values including nofollow. (:issue:`5225`)

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Fixed a :exc:`TypeError` that could be raised during :ref:`feed export <topics-feed-exports>` parameter parsing. (:issue:`5359`)

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Documentation

:ref:`asyncio support <using-asyncio>` is no longer considered experimental. (:issue:`5332`)

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Included :ref:`Windows-specific help for asyncio usage <asyncio-windows>`. (:issue:`4976`, :issue:`5315`)

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Rewrote :ref:`topics-headless-browsing` with up-to-date best practices. (:issue:`4484`, :issue:`4613`)

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Documented :ref:`local file naming in media pipelines <topics-file-naming>`. (:issue:`5069`, :issue:`5152`)

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:ref:`faq` now covers spider file name collision issues. (:issue:`2680`, :issue:`3669`)

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Provided better context and instructions to disable the :setting:`URLLENGTH_LIMIT` setting. (:issue:`5135`, :issue:`5250`)

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Documented that :ref:`reppy-parser` does not support Python 3.9+. (:issue:`5226`, :issue:`5231`)

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Documented :ref:`the scheduler component <topics-scheduler>`. (:issue:`3537`, :issue:`3559`)

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Documented the method used by :ref:`media pipelines <topics-media-pipeline>` to :ref:`determine if a file has expired <file-expiration>`. (:issue:`5120`, :issue:`5254`)

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:ref:`run-multiple-spiders` now features :func:`scrapy.utils.project.get_project_settings` usage. (:issue:`5070`)

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:ref:`run-multiple-spiders` now covers what happens when you define different per-spider values for some settings that cannot differ at run time. (:issue:`4485`, :issue:`5352`)

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Extended the documentation of the :class:`~scrapy.extensions.statsmailer.StatsMailer` extension. (:issue:`5199`, :issue:`5217`)

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Added :setting:`JOBDIR` to :ref:`topics-settings`. (:issue:`5173`, :issue:`5224`)

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Documented :attr:`Spider.attribute <scrapy.Spider.attribute>`. (:issue:`5174`, :issue:`5244`)

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Documented :attr:`TextResponse.urljoin <scrapy.http.TextResponse.urljoin>`. (:issue:`1582`)

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Added the body_length parameter to the documented signature of the :signal:`headers_received` signal. (:issue:`5270`)

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Clarified :meth:`SelectorList.get <scrapy.selector.SelectorList.get>` usage in the :ref:`tutorial <intro-tutorial>`. (:issue:`5256`)

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The documentation now features the shortest import path of classes with multiple import paths. (:issue:`2733`, :issue:`5099`)

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quotes.toscrape.com references now use HTTPS instead of HTTP. (:issue:`5395`, :issue:`5396`)

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Added a link to our Discord server to :ref:`getting-help`. (:issue:`5421`, :issue:`5422`)

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The pronunciation of the project name is now :ref:`officially <intro-overview>` /ˈskreɪpaɪ/. (:issue:`5280`, :issue:`5281`)

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Added the Scrapy logo to the README. (:issue:`5255`, :issue:`5258`)

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Fixed issues and implemented minor improvements. (:issue:`3155`, :issue:`4335`, :issue:`5074`, :issue:`5098`, :issue:`5134`, :issue:`5180`, :issue:`5194`, :issue:`5239`, :issue:`5266`, :issue:`5271`, :issue:`5273`, :issue:`5274`, :issue:`5276`, :issue:`5347`, :issue:`5356`, :issue:`5414`, :issue:`5415`, :issue:`5416`, :issue:`5419`, :issue:`5420`)

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Quality Assurance

Added support for Python 3.10. (:issue:`5212`, :issue:`5221`, :issue:`5265`)

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Significantly reduced memory usage by :func:`scrapy.utils.response.response_httprepr`, used by the :class:`~scrapy.downloadermiddlewares.stats.DownloaderStats` downloader middleware, which is enabled by default. (:issue:`4964`, :issue:`4972`)

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Removed uses of the deprecated :mod:`optparse` module. (:issue:`5366`, :issue:`5374`)

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Extended typing hints. (:issue:`5077`, :issue:`5090`, :issue:`5100`, :issue:`5108`, :issue:`5171`, :issue:`5215`, :issue:`5334`)

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Improved tests, fixed CI issues, removed unused code. (:issue:`5094`, :issue:`5157`, :issue:`5162`, :issue:`5198`, :issue:`5207`, :issue:`5208`, :issue:`5229`, :issue:`5298`, :issue:`5299`, :issue:`5310`, :issue:`5316`, :issue:`5333`, :issue:`5388`, :issue:`5389`, :issue:`5400`, :issue:`5401`, :issue:`5404`, :issue:`5405`, :issue:`5407`, :issue:`5410`, :issue:`5412`, :issue:`5425`, :issue:`5427`)

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Implemented improvements for contributors. (:issue:`5080`, :issue:`5082`, :issue:`5177`, :issue:`5200`)

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Implemented cleanups. (:issue:`5095`, :issue:`5106`, :issue:`5209`, :issue:`5228`, :issue:`5235`, :issue:`5245`, :issue:`5246`, :issue:`5292`, :issue:`5314`, :issue:`5322`)

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Scrapy 2.5.1 (2021-10-05)

Security bug fix:

If you use :class:`~scrapy.downloadermiddlewares.httpauth.HttpAuthMiddleware` (i.e. the http_user and http_pass spider attributes) for HTTP authentication, any request exposes your credentials to the request target.

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To prevent unintended exposure of authentication credentials to unintended domains, you must now additionally set a new, additional spider attribute, http_auth_domain, and point it to the specific domain to which the authentication credentials must be sent.

If the http_auth_domain spider attribute is not set, the domain of the first request will be considered the HTTP authentication target, and authentication credentials will only be sent in requests targeting that domain.

If you need to send the same HTTP authentication credentials to multiple domains, you can use :func:`w3lib.http.basic_auth_header` instead to set the value of the Authorization header of your requests.

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If you really want your spider to send the same HTTP authentication credentials to any domain, set the http_auth_domain spider attribute to None.

Finally, if you are a user of scrapy-splash, know that this version of Scrapy breaks compatibility with scrapy-splash 0.7.2 and earlier. You will need to upgrade scrapy-splash to a greater version for it to continue to work.

Scrapy 2.5.0 (2021-04-06)

Highlights:

Official Python 3.9 support
Experimental :ref:`HTTP/2 support <http2>`

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New :func:`~scrapy.downloadermiddlewares.retry.get_retry_request` function to retry requests from spider callbacks

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New :class:`~scrapy.signals.headers_received` signal that allows stopping downloads early

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New :class:`Response.protocol <scrapy.http.Response.protocol>` attribute

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Deprecation removals

Removed all code that :ref:`was deprecated in 1.7.0 <1.7-deprecations>` and had not :ref:`already been removed in 2.4.0 <2.4-deprecation-removals>`. (:issue:`4901`)

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Removed support for the SCRAPY_PICKLED_SETTINGS_TO_OVERRIDE environment variable, :ref:`deprecated in 1.8.0 <1.8-deprecations>`. (:issue:`4912`)

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Deprecations

The :mod:`scrapy.utils.py36` module is now deprecated in favor of :mod:`scrapy.utils.asyncgen`. (:issue:`4900`)

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New features

Experimental :ref:`HTTP/2 support <http2>` through a new download handler that can be assigned to the https protocol in the :setting:`DOWNLOAD_HANDLERS` setting. (:issue:`1854`, :issue:`4769`, :issue:`5058`, :issue:`5059`, :issue:`5066`)

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The new :func:`scrapy.downloadermiddlewares.retry.get_retry_request` function may be used from spider callbacks or middlewares to handle the retrying of a request beyond the scenarios that :class:`~scrapy.downloadermiddlewares.retry.RetryMiddleware` supports. (:issue:`3590`, :issue:`3685`, :issue:`4902`)

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The new :class:`~scrapy.signals.headers_received` signal gives early access to response headers and allows :ref:`stopping downloads <topics-stop-response-download>`. (:issue:`1772`, :issue:`4897`)

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The new :attr:`Response.protocol <scrapy.http.Response.protocol>` attribute gives access to the string that identifies the protocol used to download a response. (:issue:`4878`)

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:ref:`Stats <topics-stats>` now include the following entries that indicate the number of successes and failures in storing :ref:`feeds <topics-feed-exports>`:

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```
feedexport/success_count/<storage type>
feedexport/failed_count/<storage type>
```
Where <storage type> is the feed storage backend class name, such as :class:`~scrapy.extensions.feedexport.FileFeedStorage` or :class:`~scrapy.extensions.feedexport.FTPFeedStorage`.

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(:issue:`3947`, :issue:`4850`)

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The :class:`~scrapy.spidermiddlewares.urllength.UrlLengthMiddleware` spider middleware now logs ignored URLs with INFO :ref:`logging level <levels>` instead of DEBUG, and it now includes the following entry into :ref:`stats <topics-stats>` to keep track of the number of ignored URLs:

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```
urllength/request_ignored_count
```
(:issue:`5036`)

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The :class:`~scrapy.downloadermiddlewares.httpcompression.HttpCompressionMiddleware` downloader middleware now logs the number of decompressed responses and the total count of resulting bytes:

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```
httpcompression/response_bytes
httpcompression/response_count
```
(:issue:`4797`, :issue:`4799`)

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Bug fixes

Fixed installation on PyPy installing PyDispatcher in addition to PyPyDispatcher, which could prevent Scrapy from working depending on which package got imported. (:issue:`4710`, :issue:`4814`)

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When inspecting a callback to check if it is a generator that also returns a value, an exception is no longer raised if the callback has a docstring with lower indentation than the following code. (:issue:`4477`, :issue:`4935`)

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The Content-Length header is no longer omitted from responses when using the default, HTTP/1.1 download handler (see :setting:`DOWNLOAD_HANDLERS`). (:issue:`5009`, :issue:`5034`, :issue:`5045`, :issue:`5057`, :issue:`5062`)

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Setting the :reqmeta:`handle_httpstatus_all` request meta key to False now has the same effect as not setting it at all, instead of having the same effect as setting it to True. (:issue:`3851`, :issue:`4694`)

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Documentation

Added instructions to :ref:`install Scrapy in Windows using pip <intro-install-windows>`. (:issue:`4715`, :issue:`4736`)

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Logging documentation now includes :ref:`additional ways to filter logs <topics-logging-advanced-customization>`. (:issue:`4216`, :issue:`4257`, :issue:`4965`)

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Covered how to deal with long lists of allowed domains in the :ref:`FAQ <faq>`. (:issue:`2263`, :issue:`3667`)

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Covered scrapy-bench in :ref:`benchmarking`. (:issue:`4996`, :issue:`5016`)

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Clarified that one :ref:`extension <topics-extensions>` instance is created per crawler. (:issue:`5014`)

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Fixed some errors in examples. (:issue:`4829`, :issue:`4830`, :issue:`4907`, :issue:`4909`, :issue:`5008`)

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Fixed some external links, typos, and so on. (:issue:`4892`, :issue:`4899`, :issue:`4936`, :issue:`4942`, :issue:`5005`, :issue:`5063`)

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The :ref:`list of Request.meta keys <topics-request-meta>` is now sorted alphabetically. (:issue:`5061`, :issue:`5065`)

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Updated references to Scrapinghub, which is now called Zyte. (:issue:`4973`, :issue:`5072`)

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Added a mention to contributors in the README. (:issue:`4956`)

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Reduced the top margin of lists. (:issue:`4974`)

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Quality Assurance

Made Python 3.9 support official (:issue:`4757`, :issue:`4759`)

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Extended typing hints (:issue:`4895`)

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Fixed deprecated uses of the Twisted API. (:issue:`4940`, :issue:`4950`, :issue:`5073`)

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Made our tests run with the new pip resolver. (:issue:`4710`, :issue:`4814`)

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Added tests to ensure that :ref:`coroutine support <coroutine-support>` is tested. (:issue:`4987`)

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Migrated from Travis CI to GitHub Actions. (:issue:`4924`)

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Fixed CI issues. (:issue:`4986`, :issue:`5020`, :issue:`5022`, :issue:`5027`, :issue:`5052`, :issue:`5053`)

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Implemented code refactorings, style fixes and cleanups. (:issue:`4911`, :issue:`4982`, :issue:`5001`, :issue:`5002`, :issue:`5076`)

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Scrapy 2.4.1 (2020-11-17)

Fixed :ref:`feed exports <topics-feed-exports>` overwrite support (:issue:`4845`, :issue:`4857`, :issue:`4859`)

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Fixed the AsyncIO event loop handling, which could make code hang (:issue:`4855`, :issue:`4872`)

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Fixed the IPv6-capable DNS resolver :class:`~scrapy.resolver.CachingHostnameResolver` for download handlers that call :meth:`reactor.resolve <twisted.internet.interfaces.IReactorCore.resolve>` (:issue:`4802`, :issue:`4803`)

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Fixed the output of the :command:`genspider` command showing placeholders instead of the import path of the generated spider module (:issue:`4874`)

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Migrated Windows CI from Azure Pipelines to GitHub Actions (:issue:`4869`, :issue:`4876`)

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Scrapy 2.4.0 (2020-10-11)

Highlights:

Python 3.5 support has been dropped.
The file_path method of :ref:`media pipelines <topics-media-pipeline>` can now access the source :ref:`item <topics-items>`.

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This allows you to set a download file path based on item data.
The new item_export_kwargs key of the :setting:`FEEDS` setting allows to define keyword parameters to pass to :ref:`item exporter classes <topics-exporters>`

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You can now choose whether :ref:`feed exports <topics-feed-exports>` overwrite or append to the output file.

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For example, when using the :command:`crawl` or :command:`runspider` commands, you can use the -O option instead of -o to overwrite the output file.

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Zstd-compressed responses are now supported if zstandard is installed.
In settings, where the import path of a class is required, it is now possible to pass a class object instead.

Modified requirements

Python 3.6 or greater is now required; support for Python 3.5 has been dropped

As a result:
- When using PyPy, PyPy 7.2.0 or greater :ref:`is now required <faq-python-versions>`
  
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- For Amazon S3 storage support in :ref:`feed exports <topics-feed-storage-s3>` or :ref:`media pipelines <media-pipelines-s3>`, botocore 1.4.87 or greater is now required
  
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- To use the :ref:`images pipeline <images-pipeline>`, Pillow 4.0.0 or greater is now required
  
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(:issue:`4718`, :issue:`4732`, :issue:`4733`, :issue:`4742`, :issue:`4743`, :issue:`4764`)

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Backward-incompatible changes

:class:`~scrapy.downloadermiddlewares.cookies.CookiesMiddleware` once again discards cookies defined in :attr:`Request.headers <scrapy.http.Request.headers>`.

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We decided to revert this bug fix, introduced in Scrapy 2.2.0, because it was reported that the current implementation could break existing code.

If you need to set cookies for a request, use the :class:`Request.cookies <scrapy.http.Request>` parameter.

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A future version of Scrapy will include a new, better implementation of the reverted bug fix.

(:issue:`4717`, :issue:`4823`)

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Deprecation removals

:class:`scrapy.extensions.feedexport.S3FeedStorage` no longer reads the values of access_key and secret_key from the running project settings when they are not passed to its __init__ method; you must either pass those parameters to its __init__ method or use :class:`S3FeedStorage.from_crawler <scrapy.extensions.feedexport.S3FeedStorage.from_crawler>` (:issue:`4356`, :issue:`4411`, :issue:`4688`)

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:attr:`Rule.process_request <scrapy.spiders.crawl.Rule.process_request>` no longer admits callables which expect a single request parameter, rather than both request and response (:issue:`4818`)

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Deprecations

In custom :ref:`media pipelines <topics-media-pipeline>`, signatures that do not accept a keyword-only item parameter in any of the methods that :ref:`now support this parameter <media-pipeline-item-parameter>` are now deprecated (:issue:`4628`, :issue:`4686`)

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In custom :ref:`feed storage backend classes <topics-feed-storage>`, __init__ method signatures that do not accept a keyword-only feed_options parameter are now deprecated (:issue:`547`, :issue:`716`, :issue:`4512`)

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The :class:`scrapy.utils.python.WeakKeyCache` class is now deprecated (:issue:`4684`, :issue:`4701`)

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The :func:`scrapy.utils.boto.is_botocore` function is now deprecated, use :func:`scrapy.utils.boto.is_botocore_available` instead (:issue:`4734`, :issue:`4776`)

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New features

The following methods of :ref:`media pipelines <topics-media-pipeline>` now accept an item keyword-only parameter containing the source :ref:`item <topics-items>`:

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- In :class:`scrapy.pipelines.files.FilesPipeline`:
  
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  - :meth:`~scrapy.pipelines.files.FilesPipeline.media_to_download`
    
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- In :class:`scrapy.pipelines.images.ImagesPipeline`:
  
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  - :meth:`~scrapy.pipelines.images.ImagesPipeline.file_path`
    
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  - :meth:`~scrapy.pipelines.images.ImagesPipeline.media_to_download`
    
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(:issue:`4628`, :issue:`4686`)

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The new item_export_kwargs key of the :setting:`FEEDS` setting allows to define keyword parameters to pass to :ref:`item exporter classes <topics-exporters>` (:issue:`4606`, :issue:`4768`)

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:ref:`Feed exports <topics-feed-exports>` gained overwrite support:

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- When using the :command:`crawl` or :command:`runspider` commands, you can use the -O option instead of -o to overwrite the output file
  
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- You can use the overwrite key in the :setting:`FEEDS` setting to configure whether to overwrite the output file (True) or append to its content (False)
  
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- The __init__ and from_crawler methods of :ref:`feed storage backend classes <topics-feed-storage>` now receive a new keyword-only parameter, feed_options, which is a dictionary of :ref:`feed options <feed-options>`
  
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(:issue:`547`, :issue:`716`, :issue:`4512`)

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Zstd-compressed responses are now supported if zstandard is installed (:issue:`4831`)

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In settings, where the import path of a class is required, it is now possible to pass a class object instead (:issue:`3870`, :issue:`3873`).

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This includes also settings where only part of its value is made of an import path, such as :setting:`DOWNLOADER_MIDDLEWARES` or :setting:`DOWNLOAD_HANDLERS`.

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:ref:`Downloader middlewares <topics-downloader-middleware>` can now override :class:`response.request <scrapy.http.Response.request>`.

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If a :ref:`downloader middleware <topics-downloader-middleware>` returns a :class:`~scrapy.http.Response` object from :meth:`~scrapy.downloadermiddlewares.DownloaderMiddleware.process_response` or :meth:`~scrapy.downloadermiddlewares.DownloaderMiddleware.process_exception` with a custom :class:`~scrapy.http.Request` object assigned to :class:`response.request <scrapy.http.Response.request>`:

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- The response is handled by the callback of that custom :class:`~scrapy.http.Request` object, instead of being handled by the callback of the original :class:`~scrapy.http.Request` object
  
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- That custom :class:`~scrapy.http.Request` object is now sent as the request argument to the :signal:`response_received` signal, instead of the original :class:`~scrapy.http.Request` object
  
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(:issue:`4529`, :issue:`4632`)

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When using the :ref:`FTP feed storage backend <topics-feed-storage-ftp>`:

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- It is now possible to set the new overwrite :ref:`feed option <feed-options>` to False to append to an existing file instead of overwriting it
  
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- The FTP password can now be omitted if it is not necessary
(:issue:`547`, :issue:`716`, :issue:`4512`)

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The __init__ method of :class:`~scrapy.exporters.CsvItemExporter` now supports an errors parameter to indicate how to handle encoding errors (:issue:`4755`)

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When :ref:`using asyncio <using-asyncio>`, it is now possible to :ref:`set a custom asyncio loop <using-custom-loops>` (:issue:`4306`, :issue:`4414`)

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Serialized requests (see :ref:`topics-jobs`) now support callbacks that are spider methods that delegate on other callable (:issue:`4756`)

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When a response is larger than :setting:`DOWNLOAD_MAXSIZE`, the logged message is now a warning, instead of an error (:issue:`3874`, :issue:`3886`, :issue:`4752`)

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Bug fixes

The :command:`genspider` command no longer overwrites existing files unless the --force option is used (:issue:`4561`, :issue:`4616`, :issue:`4623`)

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Cookies with an empty value are no longer considered invalid cookies (:issue:`4772`)

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The :command:`runspider` command now supports files with the .pyw file extension (:issue:`4643`, :issue:`4646`)

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The :class:`~scrapy.downloadermiddlewares.httpproxy.HttpProxyMiddleware` middleware now simply ignores unsupported proxy values (:issue:`3331`, :issue:`4778`)

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Checks for generator callbacks with a return statement no longer warn about return statements in nested functions (:issue:`4720`, :issue:`4721`)

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The system file mode creation mask no longer affects the permissions of files generated using the :command:`startproject` command (:issue:`4722`)

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:func:`scrapy.utils.iterators.xmliter` now supports namespaced node names (:issue:`861`, :issue:`4746`)

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:class:`~scrapy.Request` objects can now have about: URLs, which can work when using a headless browser (:issue:`4835`)

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Documentation

The :setting:`FEED_URI_PARAMS` setting is now documented (:issue:`4671`, :issue:`4724`)

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Improved the documentation of :ref:`link extractors <topics-link-extractors>` with an usage example from a spider callback and reference documentation for the :class:`~scrapy.link.Link` class (:issue:`4751`, :issue:`4775`)

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Clarified the impact of :setting:`CONCURRENT_REQUESTS` when using the :class:`~scrapy.extensions.closespider.CloseSpider` extension (:issue:`4836`)

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Removed references to Python 2’s unicode type (:issue:`4547`, :issue:`4703`)

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We now have an :ref:`official deprecation policy <deprecation-policy>` (:issue:`4705`)

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Our :ref:`documentation policies <documentation-policies>` now cover usage of Sphinx’s :rst:dir:`versionadded` and :rst:dir:`versionchanged` directives, and we have removed usages referencing Scrapy 1.4.0 and earlier versions (:issue:`3971`, :issue:`4310`)

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Other documentation cleanups (:issue:`4090`, :issue:`4782`, :issue:`4800`, :issue:`4801`, :issue:`4809`, :issue:`4816`, :issue:`4825`)

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Quality assurance

Extended typing hints (:issue:`4243`, :issue:`4691`)

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Added tests for the :command:`check` command (:issue:`4663`)

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Fixed test failures on Debian (:issue:`4726`, :issue:`4727`, :issue:`4735`)

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Improved Windows test coverage (:issue:`4723`)

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Switched to :ref:`formatted string literals <f-strings>` where possible (:issue:`4307`, :issue:`4324`, :issue:`4672`)

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Modernized :func:`super` usage (:issue:`4707`)

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Other code and test cleanups (:issue:`1790`, :issue:`3288`, :issue:`4165`, :issue:`4564`, :issue:`4651`, :issue:`4714`, :issue:`4738`, :issue:`4745`, :issue:`4747`, :issue:`4761`, :issue:`4765`, :issue:`4804`, :issue:`4817`, :issue:`4820`, :issue:`4822`, :issue:`4839`)

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Scrapy 2.3.0 (2020-08-04)

Highlights:

:ref:`Feed exports <topics-feed-exports>` now support :ref:`Google Cloud Storage <topics-feed-storage-gcs>` as a storage backend

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The new :setting:`FEED_EXPORT_BATCH_ITEM_COUNT` setting allows to deliver output items in batches of up to the specified number of items.

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It also serves as a workaround for :ref:`delayed file delivery <delayed-file-delivery>`, which causes Scrapy to only start item delivery after the crawl has finished when using certain storage backends (:ref:`S3 <topics-feed-storage-s3>`, :ref:`FTP <topics-feed-storage-ftp>`, and now :ref:`GCS <topics-feed-storage-gcs>`).

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The base implementation of :ref:`item loaders <topics-loaders>` has been moved into a separate library, :doc:`itemloaders <itemloaders:index>`, allowing usage from outside Scrapy and a separate release schedule

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Deprecation removals

Removed the following classes and their parent modules from scrapy.linkextractors:
- htmlparser.HtmlParserLinkExtractor
- regex.RegexLinkExtractor
- sgml.BaseSgmlLinkExtractor
- sgml.SgmlLinkExtractor
Use :class:`LinkExtractor <scrapy.linkextractors.lxmlhtml.LxmlLinkExtractor>` instead (:issue:`4356`, :issue:`4679`)

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Deprecations

The scrapy.utils.python.retry_on_eintr function is now deprecated (:issue:`4683`)

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New features

:ref:`Feed exports <topics-feed-exports>` support :ref:`Google Cloud Storage <topics-feed-storage-gcs>` (:issue:`685`, :issue:`3608`)

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New :setting:`FEED_EXPORT_BATCH_ITEM_COUNT` setting for batch deliveries (:issue:`4250`, :issue:`4434`)

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The :command:`parse` command now allows specifying an output file (:issue:`4317`, :issue:`4377`)

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:meth:`Request.from_curl <scrapy.http.Request.from_curl>` and :func:`~scrapy.utils.curl.curl_to_request_kwargs` now also support --data-raw (:issue:`4612`)

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A parse callback may now be used in built-in spider subclasses, such as :class:`~scrapy.spiders.CrawlSpider` (:issue:`712`, :issue:`732`, :issue:`781`, :issue:`4254` )

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Bug fixes

Fixed the :ref:`CSV exporting <topics-feed-format-csv>` of :ref:`dataclass items <dataclass-items>` and :ref:`attr.s items <attrs-items>` (:issue:`4667`, :issue:`4668`)

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:meth:`Request.from_curl <scrapy.http.Request.from_curl>` and :func:`~scrapy.utils.curl.curl_to_request_kwargs` now set the request method to POST when a request body is specified and no request method is specified (:issue:`4612`)

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The processing of ANSI escape sequences in enabled in Windows 10.0.14393 and later, where it is required for colored output (:issue:`4393`, :issue:`4403`)

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Documentation

Updated the OpenSSL cipher list format link in the documentation about the :setting:`DOWNLOADER_CLIENT_TLS_CIPHERS` setting (:issue:`4653`)

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Simplified the code example in :ref:`topics-loaders-dataclass` (:issue:`4652`)

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Quality assurance

The base implementation of :ref:`item loaders <topics-loaders>` has been moved into :doc:`itemloaders <itemloaders:index>` (:issue:`4005`, :issue:`4516`)

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Fixed a silenced error in some scheduler tests (:issue:`4644`, :issue:`4645`)

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Renewed the localhost certificate used for SSL tests (:issue:`4650`)

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Removed cookie-handling code specific to Python 2 (:issue:`4682`)

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Stopped using Python 2 unicode literal syntax (:issue:`4704`)

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Stopped using a backlash for line continuation (:issue:`4673`)

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Removed unneeded entries from the MyPy exception list (:issue:`4690`)

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Automated tests now pass on Windows as part of our continuous integration system (:issue:`4458`)

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Automated tests now pass on the latest PyPy version for supported Python versions in our continuous integration system (:issue:`4504`)

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Scrapy 2.2.1 (2020-07-17)

The :command:`startproject` command no longer makes unintended changes to the permissions of files in the destination folder, such as removing execution permissions (:issue:`4662`, :issue:`4666`)

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Scrapy 2.2.0 (2020-06-24)

Highlights:

Python 3.5.2+ is required now
:ref:`dataclass objects <dataclass-items>` and :ref:`attrs objects <attrs-items>` are now valid :ref:`item types <item-types>`

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New :meth:`TextResponse.json <scrapy.http.TextResponse.json>` method

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New :signal:`bytes_received` signal that allows canceling response download

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:class:`~scrapy.downloadermiddlewares.cookies.CookiesMiddleware` fixes

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Backward-incompatible changes

Support for Python 3.5.0 and 3.5.1 has been dropped; Scrapy now refuses to run with a Python version lower than 3.5.2, which introduced :class:`typing.Type` (:issue:`4615`)

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Deprecations

:meth:`TextResponse.body_as_unicode <scrapy.http.TextResponse.body_as_unicode>` is now deprecated, use :attr:`TextResponse.text <scrapy.http.TextResponse.text>` instead (:issue:`4546`, :issue:`4555`, :issue:`4579`)

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:class:`scrapy.item.BaseItem` is now deprecated, use :class:`scrapy.item.Item` instead (:issue:`4534`)

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New features

:ref:`dataclass objects <dataclass-items>` and :ref:`attrs objects <attrs-items>` are now valid :ref:`item types <item-types>`, and a new itemadapter library makes it easy to write code that :ref:`supports any item type <supporting-item-types>` (:issue:`2749`, :issue:`2807`, :issue:`3761`, :issue:`3881`, :issue:`4642`)

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A new :meth:`TextResponse.json <scrapy.http.TextResponse.json>` method allows to deserialize JSON responses (:issue:`2444`, :issue:`4460`, :issue:`4574`)

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A new :signal:`bytes_received` signal allows monitoring response download progress and :ref:`stopping downloads <topics-stop-response-download>` (:issue:`4205`, :issue:`4559`)

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The dictionaries in the result list of a :ref:`media pipeline <topics-media-pipeline>` now include a new key, status, which indicates if the file was downloaded or, if the file was not downloaded, why it was not downloaded; see :meth:`FilesPipeline.get_media_requests <scrapy.pipelines.files.FilesPipeline.get_media_requests>` for more information (:issue:`2893`, :issue:`4486`)

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When using :ref:`Google Cloud Storage <media-pipeline-gcs>` for a :ref:`media pipeline <topics-media-pipeline>`, a warning is now logged if the configured credentials do not grant the required permissions (:issue:`4346`, :issue:`4508`)

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:ref:`Link extractors <topics-link-extractors>` are now serializable, as long as you do not use :ref:`lambdas <lambda>` for parameters; for example, you can now pass link extractors in :attr:`Request.cb_kwargs <scrapy.http.Request.cb_kwargs>` or :attr:`Request.meta <scrapy.http.Request.meta>` when :ref:`persisting scheduled requests <topics-jobs>` (:issue:`4554`)

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Upgraded the :ref:`pickle protocol <pickle-protocols>` that Scrapy uses from protocol 2 to protocol 4, improving serialization capabilities and performance (:issue:`4135`, :issue:`4541`)

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:func:`scrapy.utils.misc.create_instance` now raises a :exc:`TypeError` exception if the resulting instance is None (:issue:`4528`, :issue:`4532`)

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Bug fixes

:class:`~scrapy.downloadermiddlewares.cookies.CookiesMiddleware` no longer discards cookies defined in :attr:`Request.headers <scrapy.http.Request.headers>` (:issue:`1992`, :issue:`2400`)

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:class:`~scrapy.downloadermiddlewares.cookies.CookiesMiddleware` no longer re-encodes cookies defined as :class:`bytes` in the cookies parameter of the __init__ method of :class:`~scrapy.http.Request` (:issue:`2400`, :issue:`3575`)

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When :setting:`FEEDS` defines multiple URIs, :setting:`FEED_STORE_EMPTY` is False and the crawl yields no items, Scrapy no longer stops feed exports after the first URI (:issue:`4621`, :issue:`4626`)

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:class:`~scrapy.spiders.Spider` callbacks defined using :doc:`coroutine syntax <topics/coroutines>` no longer need to return an iterable, and may instead return a :class:`~scrapy.http.Request` object, an :ref:`item <topics-items>`, or None (:issue:`4609`)

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The :command:`startproject` command now ensures that the generated project folders and files have the right permissions (:issue:`4604`)

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Fix a :exc:`KeyError` exception being sometimes raised from :class:`scrapy.utils.datatypes.LocalWeakReferencedCache` (:issue:`4597`, :issue:`4599`)

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When :setting:`FEEDS` defines multiple URIs, log messages about items being stored now contain information from the corresponding feed, instead of always containing information about only one of the feeds (:issue:`4619`, :issue:`4629`)

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Documentation

Added a new section about :ref:`accessing cb_kwargs from errbacks <errback-cb_kwargs>` (:issue:`4598`, :issue:`4634`)

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Covered chompjs in :ref:`topics-parsing-javascript` (:issue:`4556`, :issue:`4562`)

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Removed from :doc:`topics/coroutines` the warning about the API being experimental (:issue:`4511`, :issue:`4513`)

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Removed references to unsupported versions of :doc:`Twisted <twisted:index>` (:issue:`4533`)

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Updated the description of the :ref:`screenshot pipeline example <ScreenshotPipeline>`, which now uses :doc:`coroutine syntax <topics/coroutines>` instead of returning a :class:`~twisted.internet.defer.Deferred` (:issue:`4514`, :issue:`4593`)

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Removed a misleading import line from the :func:`scrapy.utils.log.configure_logging` code example (:issue:`4510`, :issue:`4587`)

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The display-on-hover behavior of internal documentation references now also covers links to :ref:`commands <topics-commands>`, :attr:`Request.meta <scrapy.http.Request.meta>` keys, :ref:`settings <topics-settings>` and :ref:`signals <topics-signals>` (:issue:`4495`, :issue:`4563`)

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It is again possible to download the documentation for offline reading (:issue:`4578`, :issue:`4585`)

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Removed backslashes preceding *args and **kwargs in some function and method signatures (:issue:`4592`, :issue:`4596`)

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Quality assurance

Adjusted the code base further to our :ref:`style guidelines <coding-style>` (:issue:`4237`, :issue:`4525`, :issue:`4538`, :issue:`4539`, :issue:`4540`, :issue:`4542`, :issue:`4543`, :issue:`4544`, :issue:`4545`, :issue:`4557`, :issue:`4558`, :issue:`4566`, :issue:`4568`, :issue:`4572`)

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Removed remnants of Python 2 support (:issue:`4550`, :issue:`4553`, :issue:`4568`)

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Improved code sharing between the :command:`crawl` and :command:`runspider` commands (:issue:`4548`, :issue:`4552`)

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Replaced chain(*iterable) with chain.from_iterable(iterable) (:issue:`4635`)

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You may now run the :mod:`asyncio` tests with Tox on any Python version (:issue:`4521`)

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Updated test requirements to reflect an incompatibility with pytest 5.4 and 5.4.1 (:issue:`4588`)

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Improved :class:`~scrapy.spiderloader.SpiderLoader` test coverage for scenarios involving duplicate spider names (:issue:`4549`, :issue:`4560`)

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Configured Travis CI to also run the tests with Python 3.5.2 (:issue:`4518`, :issue:`4615`)

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Added a Pylint job to Travis CI (:issue:`3727`)

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Added a Mypy job to Travis CI (:issue:`4637`)

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Made use of set literals in tests (:issue:`4573`)

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Cleaned up the Travis CI configuration (:issue:`4517`, :issue:`4519`, :issue:`4522`, :issue:`4537`)

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Scrapy 2.1.0 (2020-04-24)

Highlights:

New :setting:`FEEDS` setting to export to multiple feeds

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New :attr:`Response.ip_address <scrapy.http.Response.ip_address>` attribute

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Backward-incompatible changes

:exc:`AssertionError` exceptions triggered by :ref:`assert <assert>` statements have been replaced by new exception types, to support running Python in optimized mode (see :option:`-O`) without changing Scrapy’s behavior in any unexpected ways.

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If you catch an :exc:`AssertionError` exception from Scrapy, update your code to catch the corresponding new exception.

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(:issue:`4440`)

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Deprecation removals

The LOG_UNSERIALIZABLE_REQUESTS setting is no longer supported, use :setting:`SCHEDULER_DEBUG` instead (:issue:`4385`)

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The REDIRECT_MAX_METAREFRESH_DELAY setting is no longer supported, use :setting:`METAREFRESH_MAXDELAY` instead (:issue:`4385`)

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The :class:`~scrapy.downloadermiddlewares.chunked.ChunkedTransferMiddleware` middleware has been removed, including the entire :class:`scrapy.downloadermiddlewares.chunked` module; chunked transfers work out of the box (:issue:`4431`)

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The spiders property has been removed from :class:`~scrapy.crawler.Crawler`, use :class:`CrawlerRunner.spider_loader <scrapy.crawler.CrawlerRunner.spider_loader>` or instantiate :setting:`SPIDER_LOADER_CLASS` with your settings instead (:issue:`4398`)

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The MultiValueDict, MultiValueDictKeyError, and SiteNode classes have been removed from :mod:`scrapy.utils.datatypes` (:issue:`4400`)

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Deprecations

The FEED_FORMAT and FEED_URI settings have been deprecated in favor of the new :setting:`FEEDS` setting (:issue:`1336`, :issue:`3858`, :issue:`4507`)

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New features

A new setting, :setting:`FEEDS`, allows configuring multiple output feeds with different settings each (:issue:`1336`, :issue:`3858`, :issue:`4507`)

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The :command:`crawl` and :command:`runspider` commands now support multiple -o parameters (:issue:`1336`, :issue:`3858`, :issue:`4507`)

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The :command:`crawl` and :command:`runspider` commands now support specifying an output format by appending :<format> to the output file (:issue:`1336`, :issue:`3858`, :issue:`4507`)

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The new :attr:`Response.ip_address <scrapy.http.Response.ip_address>` attribute gives access to the IP address that originated a response (:issue:`3903`, :issue:`3940`)

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A warning is now issued when a value in :attr:`~scrapy.spiders.Spider.allowed_domains` includes a port (:issue:`50`, :issue:`3198`, :issue:`4413`)

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Zsh completion now excludes used option aliases from the completion list (:issue:`4438`)

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Bug fixes

:ref:`Request serialization <request-serialization>` no longer breaks for callbacks that are spider attributes which are assigned a function with a different name (:issue:`4500`)

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None values in :attr:`~scrapy.spiders.Spider.allowed_domains` no longer cause a :exc:`TypeError` exception (:issue:`4410`)

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Zsh completion no longer allows options after arguments (:issue:`4438`)

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zope.interface 5.0.0 and later versions are now supported (:issue:`4447`, :issue:`4448`)

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Spider.make_requests_from_url, deprecated in Scrapy 1.4.0, now issues a warning when used (:issue:`4412`)

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Documentation

Improved the documentation about signals that allow their handlers to return a :class:`~twisted.internet.defer.Deferred` (:issue:`4295`, :issue:`4390`)

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Our PyPI entry now includes links for our documentation, our source code repository and our issue tracker (:issue:`4456`)

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Covered the curl2scrapy service in the documentation (:issue:`4206`, :issue:`4455`)

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Removed references to the Guppy library, which only works in Python 2 (:issue:`4285`, :issue:`4343`)

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Extended use of InterSphinx to link to Python 3 documentation (:issue:`4444`, :issue:`4445`)

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Added support for Sphinx 3.0 and later (:issue:`4475`, :issue:`4480`, :issue:`4496`, :issue:`4503`)

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Quality assurance

Removed warnings about using old, removed settings (:issue:`4404`)

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Removed a warning about importing :class:`~twisted.internet.testing.StringTransport` from twisted.test.proto_helpers in Twisted 19.7.0 or newer (:issue:`4409`)

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Removed outdated Debian package build files (:issue:`4384`)

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Removed :class:`object` usage as a base class (:issue:`4430`)

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Removed code that added support for old versions of Twisted that we no longer support (:issue:`4472`)

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Fixed code style issues (:issue:`4468`, :issue:`4469`, :issue:`4471`, :issue:`4481`)

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Removed :func:`twisted.internet.defer.returnValue` calls (:issue:`4443`, :issue:`4446`, :issue:`4489`)

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Scrapy 2.0.1 (2020-03-18)

:meth:`Response.follow_all <scrapy.http.Response.follow_all>` now supports an empty URL iterable as input (:issue:`4408`, :issue:`4420`)

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Removed top-level :mod:`~twisted.internet.reactor` imports to prevent errors about the wrong Twisted reactor being installed when setting a different Twisted reactor using :setting:`TWISTED_REACTOR` (:issue:`4401`, :issue:`4406`)

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Fixed tests (:issue:`4422`)

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Scrapy 2.0.0 (2020-03-03)

Highlights:

Python 2 support has been removed
:doc:`Partial <topics/coroutines>` :ref:`coroutine syntax <async>` support and :doc:`experimental <topics/asyncio>` :mod:`asyncio` support

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New :meth:`Response.follow_all <scrapy.http.Response.follow_all>` method

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:ref:`FTP support <media-pipeline-ftp>` for media pipelines

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New :attr:`Response.certificate <scrapy.http.Response.certificate>` attribute

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IPv6 support through :setting:`DNS_RESOLVER`

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Backward-incompatible changes

Python 2 support has been removed, following Python 2 end-of-life on January 1, 2020 (:issue:`4091`, :issue:`4114`, :issue:`4115`, :issue:`4121`, :issue:`4138`, :issue:`4231`, :issue:`4242`, :issue:`4304`, :issue:`4309`, :issue:`4373`)

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Retry gaveups (see :setting:`RETRY_TIMES`) are now logged as errors instead of as debug information (:issue:`3171`, :issue:`3566`)

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File extensions that :class:`LinkExtractor <scrapy.linkextractors.lxmlhtml.LxmlLinkExtractor>` ignores by default now also include 7z, 7zip, apk, bz2, cdr, dmg, ico, iso, tar, tar.gz, webm, and xz (:issue:`1837`, :issue:`2067`, :issue:`4066`)

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The :setting:`METAREFRESH_IGNORE_TAGS` setting is now an empty list by default, following web browser behavior (:issue:`3844`, :issue:`4311`)

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The :class:`~scrapy.downloadermiddlewares.httpcompression.HttpCompressionMiddleware` now includes spaces after commas in the value of the Accept-Encoding header that it sets, following web browser behavior (:issue:`4293`)

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The __init__ method of custom download handlers (see :setting:`DOWNLOAD_HANDLERS`) or subclasses of the following downloader handlers no longer receives a settings parameter:

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- :class:`scrapy.core.downloader.handlers.datauri.DataURIDownloadHandler`
  
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Use the from_settings or from_crawler class methods to expose such a parameter to your custom download handlers.

(:issue:`4126`)

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We have refactored the :class:`scrapy.core.scheduler.Scheduler` class and related queue classes (see :setting:`SCHEDULER_PRIORITY_QUEUE`, :setting:`SCHEDULER_DISK_QUEUE` and :setting:`SCHEDULER_MEMORY_QUEUE`) to make it easier to implement custom scheduler queue classes. See :ref:`2-0-0-scheduler-queue-changes` below for details.

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Overridden settings are now logged in a different format. This is more in line with similar information logged at startup (:issue:`4199`)

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Deprecation removals

The :ref:`Scrapy shell <topics-shell>` no longer provides a sel proxy object, use :meth:`response.selector <scrapy.http.Response.selector>` instead (:issue:`4347`)

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LevelDB support has been removed (:issue:`4112`)

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The following functions have been removed from :mod:`scrapy.utils.python`: isbinarytext, is_writable, setattr_default, stringify_dict (:issue:`4362`)

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Deprecations

Using environment variables prefixed with SCRAPY_ to override settings is deprecated (:issue:`4300`, :issue:`4374`, :issue:`4375`)

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:class:`scrapy.linkextractors.FilteringLinkExtractor` is deprecated, use :class:`scrapy.linkextractors.LinkExtractor <scrapy.linkextractors.lxmlhtml.LxmlLinkExtractor>` instead (:issue:`4045`)

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The noconnect query string argument of proxy URLs is deprecated and should be removed from proxy URLs (:issue:`4198`)

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The :meth:`next <scrapy.utils.python.MutableChain.next>` method of :class:`scrapy.utils.python.MutableChain` is deprecated, use the global :func:`next` function or :meth:`MutableChain.__next__ <scrapy.utils.python.MutableChain.__next__>` instead (:issue:`4153`)

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New features

Added :doc:`partial support <topics/coroutines>` for Python’s :ref:`coroutine syntax <async>` and :doc:`experimental support <topics/asyncio>` for :mod:`asyncio` and :mod:`asyncio`-powered libraries (:issue:`4010`, :issue:`4259`, :issue:`4269`, :issue:`4270`, :issue:`4271`, :issue:`4316`, :issue:`4318`)

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The new :meth:`Response.follow_all <scrapy.http.Response.follow_all>` method offers the same functionality as :meth:`Response.follow <scrapy.http.Response.follow>` but supports an iterable of URLs as input and returns an iterable of requests (:issue:`2582`, :issue:`4057`, :issue:`4286`)

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:ref:`Media pipelines <topics-media-pipeline>` now support :ref:`FTP storage <media-pipeline-ftp>` (:issue:`3928`, :issue:`3961`)

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The new :attr:`Response.certificate <scrapy.http.Response.certificate>` attribute exposes the SSL certificate of the server as a :class:`twisted.internet.ssl.Certificate` object for HTTPS responses (:issue:`2726`, :issue:`4054`)

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A new :setting:`DNS_RESOLVER` setting allows enabling IPv6 support (:issue:`1031`, :issue:`4227`)

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A new :setting:`SCRAPER_SLOT_MAX_ACTIVE_SIZE` setting allows configuring the existing soft limit that pauses request downloads when the total response data being processed is too high (:issue:`1410`, :issue:`3551`)

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A new :setting:`TWISTED_REACTOR` setting allows customizing the :mod:`~twisted.internet.reactor` that Scrapy uses, allowing to :doc:`enable asyncio support <topics/asyncio>` or deal with a :ref:`common macOS issue <faq-specific-reactor>` (:issue:`2905`, :issue:`4294`)

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Scheduler disk and memory queues may now use the class methods from_crawler or from_settings (:issue:`3884`)

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The new :attr:`Response.cb_kwargs <scrapy.http.Response.cb_kwargs>` attribute serves as a shortcut for :attr:`Response.request.cb_kwargs <scrapy.http.Request.cb_kwargs>` (:issue:`4331`)

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:meth:`Response.follow <scrapy.http.Response.follow>` now supports a flags parameter, for consistency with :class:`~scrapy.http.Request` (:issue:`4277`, :issue:`4279`)

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:ref:`Item loader processors <topics-loaders-processors>` can now be regular functions, they no longer need to be methods (:issue:`3899`)

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:class:`~scrapy.spiders.Rule` now accepts an errback parameter (:issue:`4000`)

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:class:`~scrapy.http.Request` no longer requires a callback parameter when an errback parameter is specified (:issue:`3586`, :issue:`4008`)

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:class:`~scrapy.logformatter.LogFormatter` now supports some additional methods:

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- :class:`~scrapy.logformatter.LogFormatter.download_error` for download errors
  
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- :class:`~scrapy.logformatter.LogFormatter.item_error` for exceptions raised during item processing by :ref:`item pipelines <topics-item-pipeline>`
  
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- :class:`~scrapy.logformatter.LogFormatter.spider_error` for exceptions raised from :ref:`spider callbacks <topics-spiders>`
  
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(:issue:`374`, :issue:`3986`, :issue:`3989`, :issue:`4176`, :issue:`4188`)

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The :setting:`FEED_URI` setting now supports :class:`pathlib.Path` values (:issue:`3731`, :issue:`4074`)

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A new :signal:`request_left_downloader` signal is sent when a request leaves the downloader (:issue:`4303`)

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Scrapy logs a warning when it detects a request callback or errback that uses yield but also returns a value, since the returned value would be lost (:issue:`3484`, :issue:`3869`)

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:class:`~scrapy.spiders.Spider` objects now raise an :exc:`AttributeError` exception if they do not have a :class:`~scrapy.spiders.Spider.start_urls` attribute nor reimplement :class:`~scrapy.spiders.Spider.start_requests`, but have a start_url attribute (:issue:`4133`, :issue:`4170`)

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:class:`~scrapy.exporters.BaseItemExporter` subclasses may now use super().__init__(**kwargs) instead of self._configure(kwargs) in their __init__ method, passing dont_fail=True to the parent __init__ method if needed, and accessing kwargs at self._kwargs after calling their parent __init__ method (:issue:`4193`, :issue:`4370`)

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A new keep_fragments parameter of scrapy.utils.request.request_fingerprint allows to generate different fingerprints for requests with different fragments in their URL (:issue:`4104`)

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Download handlers (see :setting:`DOWNLOAD_HANDLERS`) may now use the from_settings and from_crawler class methods that other Scrapy components already supported (:issue:`4126`)

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:class:`scrapy.utils.python.MutableChain.__iter__` now returns self, allowing it to be used as a sequence (:issue:`4153`)

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Bug fixes

The :command:`crawl` command now also exits with exit code 1 when an exception happens before the crawling starts (:issue:`4175`, :issue:`4207`)

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:class:`LinkExtractor.extract_links <scrapy.linkextractors.lxmlhtml.LxmlLinkExtractor.extract_links>` no longer re-encodes the query string or URLs from non-UTF-8 responses in UTF-8 (:issue:`998`, :issue:`1403`, :issue:`1949`, :issue:`4321`)

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The first spider middleware (see :setting:`SPIDER_MIDDLEWARES`) now also processes exceptions raised from callbacks that are generators (:issue:`4260`, :issue:`4272`)

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Redirects to URLs starting with 3 slashes (///) are now supported (:issue:`4032`, :issue:`4042`)

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:class:`~scrapy.http.Request` no longer accepts strings as url simply because they have a colon (:issue:`2552`, :issue:`4094`)

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The correct encoding is now used for attach names in :class:`~scrapy.mail.MailSender` (:issue:`4229`, :issue:`4239`)

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:class:`~scrapy.dupefilters.RFPDupeFilter`, the default :setting:`DUPEFILTER_CLASS`, no longer writes an extra \r character on each line in Windows, which made the size of the requests.seen file unnecessarily large on that platform (:issue:`4283`)

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Z shell auto-completion now looks for .html files, not .http files, and covers the -h command-line switch (:issue:`4122`, :issue:`4291`)

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Adding items to a :class:`scrapy.utils.datatypes.LocalCache` object without a limit defined no longer raises a :exc:`TypeError` exception (:issue:`4123`)

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Fixed a typo in the message of the :exc:`ValueError` exception raised when :func:`scrapy.utils.misc.create_instance` gets both settings and crawler set to None (:issue:`4128`)

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Documentation

API documentation now links to an online, syntax-highlighted view of the corresponding source code (:issue:`4148`)

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Links to unexisting documentation pages now allow access to the sidebar (:issue:`4152`, :issue:`4169`)

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Cross-references within our documentation now display a tooltip when hovered (:issue:`4173`, :issue:`4183`)

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Improved the documentation about :meth:`LinkExtractor.extract_links <scrapy.linkextractors.lxmlhtml.LxmlLinkExtractor.extract_links>` and simplified :ref:`topics-link-extractors` (:issue:`4045`)

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Clarified how :class:`ItemLoader.item <scrapy.loader.ItemLoader.item>` works (:issue:`3574`, :issue:`4099`)

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Clarified that :func:`logging.basicConfig` should not be used when also using :class:`~scrapy.crawler.CrawlerProcess` (:issue:`2149`, :issue:`2352`, :issue:`3146`, :issue:`3960`)

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Clarified the requirements for :class:`~scrapy.http.Request` objects :ref:`when using persistence <request-serialization>` (:issue:`4124`, :issue:`4139`)

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Clarified how to install a :ref:`custom image pipeline <media-pipeline-example>` (:issue:`4034`, :issue:`4252`)

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Fixed the signatures of the file_path method in :ref:`media pipeline <topics-media-pipeline>` examples (:issue:`4290`)

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Covered a backward-incompatible change in Scrapy 1.7.0 affecting custom :class:`scrapy.core.scheduler.Scheduler` subclasses (:issue:`4274`)

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Improved the README.rst and CODE_OF_CONDUCT.md files (:issue:`4059`)

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Documentation examples are now checked as part of our test suite and we have fixed some of the issues detected (:issue:`4142`, :issue:`4146`, :issue:`4171`, :issue:`4184`, :issue:`4190`)

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Fixed logic issues, broken links and typos (:issue:`4247`, :issue:`4258`, :issue:`4282`, :issue:`4288`, :issue:`4305`, :issue:`4308`, :issue:`4323`, :issue:`4338`, :issue:`4359`, :issue:`4361`)

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Improved consistency when referring to the __init__ method of an object (:issue:`4086`, :issue:`4088`)

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Fixed an inconsistency between code and output in :ref:`intro-overview` (:issue:`4213`)

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Extended :mod:`~sphinx.ext.intersphinx` usage (:issue:`4147`, :issue:`4172`, :issue:`4185`, :issue:`4194`, :issue:`4197`)

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We now use a recent version of Python to build the documentation (:issue:`4140`, :issue:`4249`)

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Cleaned up documentation (:issue:`4143`, :issue:`4275`)

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Quality assurance

Re-enabled proxy CONNECT tests (:issue:`2545`, :issue:`4114`)

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Added Bandit security checks to our test suite (:issue:`4162`, :issue:`4181`)

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Added Flake8 style checks to our test suite and applied many of the corresponding changes (:issue:`3944`, :issue:`3945`, :issue:`4137`, :issue:`4157`, :issue:`4167`, :issue:`4174`, :issue:`4186`, :issue:`4195`, :issue:`4238`, :issue:`4246`, :issue:`4355`, :issue:`4360`, :issue:`4365`)

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Improved test coverage (:issue:`4097`, :issue:`4218`, :issue:`4236`)

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Started reporting slowest tests, and improved the performance of some of them (:issue:`4163`, :issue:`4164`)

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Fixed broken tests and refactored some tests (:issue:`4014`, :issue:`4095`, :issue:`4244`, :issue:`4268`, :issue:`4372`)

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Modified the :doc:`tox <tox:index>` configuration to allow running tests with any Python version, run Bandit and Flake8 tests by default, and enforce a minimum tox version programmatically (:issue:`4179`)

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Cleaned up code (:issue:`3937`, :issue:`4208`, :issue:`4209`, :issue:`4210`, :issue:`4212`, :issue:`4369`, :issue:`4376`, :issue:`4378`)

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Changes to scheduler queue classes

The following changes may impact any custom queue classes of all types:

The push method no longer receives a second positional parameter containing request.priority * -1. If you need that value, get it from the first positional parameter, request, instead, or use the new :meth:`~scrapy.core.scheduler.ScrapyPriorityQueue.priority` method in :class:`scrapy.core.scheduler.ScrapyPriorityQueue` subclasses.

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The following changes may impact custom priority queue classes:

In the __init__ method or the from_crawler or from_settings class methods:
- The parameter that used to contain a factory function, qfactory, is now passed as a keyword parameter named downstream_queue_cls.
- A new keyword parameter has been added: key. It is a string that is always an empty string for memory queues and indicates the :setting:`JOB_DIR` value for disk queues.
  
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- The parameter for disk queues that contains data from the previous crawl, startprios or slot_startprios, is now passed as a keyword parameter named startprios.
- The serialize parameter is no longer passed. The disk queue class must take care of request serialization on its own before writing to disk, using the :func:`~scrapy.utils.reqser.request_to_dict` and :func:`~scrapy.utils.reqser.request_from_dict` functions from the :mod:`scrapy.utils.reqser` module.
  
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The following changes may impact custom disk and memory queue classes:

The signature of the __init__ method is now __init__(self, crawler, key).

The following changes affect specifically the :class:`~scrapy.core.scheduler.ScrapyPriorityQueue` and :class:`~scrapy.core.scheduler.DownloaderAwarePriorityQueue` classes from :mod:`scrapy.core.scheduler` and may affect subclasses:

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In the __init__ method, most of the changes described above apply.

__init__ may still receive all parameters as positional parameters, however:
- downstream_queue_cls, which replaced qfactory, must be instantiated differently.
  
  qfactory was instantiated with a priority value (integer).
  
  Instances of downstream_queue_cls should be created using the new :meth:`ScrapyPriorityQueue.qfactory <scrapy.core.scheduler.ScrapyPriorityQueue.qfactory>` or :meth:`DownloaderAwarePriorityQueue.pqfactory <scrapy.core.scheduler.DownloaderAwarePriorityQueue.pqfactory>` methods.
  
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- The new key parameter displaced the startprios parameter 1 position to the right.
The following class attributes have been added:
- :attr:`~scrapy.core.scheduler.ScrapyPriorityQueue.crawler`
  
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- :attr:`~scrapy.core.scheduler.ScrapyPriorityQueue.downstream_queue_cls` (details above)
  
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- :attr:`~scrapy.core.scheduler.ScrapyPriorityQueue.key` (details above)
  
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The serialize attribute has been removed (details above)

The following changes affect specifically the :class:`~scrapy.core.scheduler.ScrapyPriorityQueue` class and may affect subclasses:

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A new :meth:`~scrapy.core.scheduler.ScrapyPriorityQueue.priority` method has been added which, given a request, returns request.priority * -1.

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It is used in :meth:`~scrapy.core.scheduler.ScrapyPriorityQueue.push` to make up for the removal of its priority parameter.

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The spider attribute has been removed. Use :attr:`crawler.spider <scrapy.core.scheduler.ScrapyPriorityQueue.crawler>` instead.

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The following changes affect specifically the :class:`~scrapy.core.scheduler.DownloaderAwarePriorityQueue` class and may affect subclasses:

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A new :attr:`~scrapy.core.scheduler.DownloaderAwarePriorityQueue.pqueues` attribute offers a mapping of downloader slot names to the corresponding instances of :attr:`~scrapy.core.scheduler.DownloaderAwarePriorityQueue.downstream_queue_cls`.

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(:issue:`3884`)

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Scrapy 1.8.3 (2022-07-25)

Security bug fix:

When :class:`~scrapy.downloadermiddlewares.httpproxy.HttpProxyMiddleware` processes a request with :reqmeta:`proxy` metadata, and that :reqmeta:`proxy` metadata includes proxy credentials, :class:`~scrapy.downloadermiddlewares.httpproxy.HttpProxyMiddleware` sets the Proxy-Authentication header, but only if that header is not already set.

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There are third-party proxy-rotation downloader middlewares that set different :reqmeta:`proxy` metadata every time they process a request.

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Because of request retries and redirects, the same request can be processed by downloader middlewares more than once, including both :class:`~scrapy.downloadermiddlewares.httpproxy.HttpProxyMiddleware` and any third-party proxy-rotation downloader middleware.

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These third-party proxy-rotation downloader middlewares could change the :reqmeta:`proxy` metadata of a request to a new value, but fail to remove the Proxy-Authentication header from the previous value of the :reqmeta:`proxy` metadata, causing the credentials of one proxy to be sent to a different proxy.

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To prevent the unintended leaking of proxy credentials, the behavior of :class:`~scrapy.downloadermiddlewares.httpproxy.HttpProxyMiddleware` is now as follows when processing a request:

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- If the request being processed defines :reqmeta:`proxy` metadata that includes credentials, the Proxy-Authorization header is always updated to feature those credentials.
  
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- If the request being processed defines :reqmeta:`proxy` metadata without credentials, the Proxy-Authorization header is removed unless it was originally defined for the same proxy URL.
  
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  To remove proxy credentials while keeping the same proxy URL, remove the Proxy-Authorization header.
- If the request has no :reqmeta:`proxy` metadata, or that metadata is a falsy value (e.g. None), the Proxy-Authorization header is removed.
  
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  It is no longer possible to set a proxy URL through the :reqmeta:`proxy` metadata but set the credentials through the Proxy-Authorization header. Set proxy credentials through the :reqmeta:`proxy` metadata instead.
  
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Scrapy 1.8.2 (2022-03-01)

Security bug fixes:

When a :class:`~scrapy.http.Request` object with cookies defined gets a redirect response causing a new :class:`~scrapy.http.Request` object to be scheduled, the cookies defined in the original :class:`~scrapy.http.Request` object are no longer copied into the new :class:`~scrapy.http.Request` object.

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If you manually set the Cookie header on a :class:`~scrapy.http.Request` object and the domain name of the redirect URL is not an exact match for the domain of the URL of the original :class:`~scrapy.http.Request` object, your Cookie header is now dropped from the new :class:`~scrapy.http.Request` object.

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The old behavior could be exploited by an attacker to gain access to your cookies. Please, see the cjvr-mfj7-j4j8 security advisory for more information.

Note

It is still possible to enable the sharing of cookies between different domains with a shared domain suffix (e.g. example.com and any subdomain) by defining the shared domain suffix (e.g. example.com) as the cookie domain when defining your cookies. See the documentation of the :class:`~scrapy.http.Request` class for more information.

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When the domain of a cookie, either received in the Set-Cookie header of a response or defined in a :class:`~scrapy.http.Request` object, is set to a public suffix, the cookie is now ignored unless the cookie domain is the same as the request domain.

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The old behavior could be exploited by an attacker to inject cookies into your requests to some other domains. Please, see the mfjm-vh54-3f96 security advisory for more information.

Scrapy 1.8.1 (2021-10-05)

Security bug fix:

If you use :class:`~scrapy.downloadermiddlewares.httpauth.HttpAuthMiddleware` (i.e. the http_user and http_pass spider attributes) for HTTP authentication, any request exposes your credentials to the request target.

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To prevent unintended exposure of authentication credentials to unintended domains, you must now additionally set a new, additional spider attribute, http_auth_domain, and point it to the specific domain to which the authentication credentials must be sent.

If the http_auth_domain spider attribute is not set, the domain of the first request will be considered the HTTP authentication target, and authentication credentials will only be sent in requests targeting that domain.

If you need to send the same HTTP authentication credentials to multiple domains, you can use :func:`w3lib.http.basic_auth_header` instead to set the value of the Authorization header of your requests.

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If you really want your spider to send the same HTTP authentication credentials to any domain, set the http_auth_domain spider attribute to None.

Finally, if you are a user of scrapy-splash, know that this version of Scrapy breaks compatibility with scrapy-splash 0.7.2 and earlier. You will need to upgrade scrapy-splash to a greater version for it to continue to work.

Scrapy 1.8.0 (2019-10-28)

Highlights:

Dropped Python 3.4 support and updated minimum requirements; made Python 3.8 support official
New :meth:`Request.from_curl <scrapy.http.Request.from_curl>` class method

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New :setting:`ROBOTSTXT_PARSER` and :setting:`ROBOTSTXT_USER_AGENT` settings

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New :setting:`DOWNLOADER_CLIENT_TLS_CIPHERS` and :setting:`DOWNLOADER_CLIENT_TLS_VERBOSE_LOGGING` settings

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Backward-incompatible changes

Python 3.4 is no longer supported, and some of the minimum requirements of Scrapy have also changed:
- :doc:`cssselect <cssselect:index>` 0.9.1
  
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- cryptography 2.0
- lxml 3.5.0
- pyOpenSSL 16.2.0
- queuelib 1.4.2
- service_identity 16.0.0
- six 1.10.0
- Twisted 17.9.0 (16.0.0 with Python 2)
- zope.interface 4.1.3
(:issue:`3892`)

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JSONRequest is now called :class:`~scrapy.http.JsonRequest` for consistency with similar classes (:issue:`3929`, :issue:`3982`)

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If you are using a custom context factory (:setting:`DOWNLOADER_CLIENTCONTEXTFACTORY`), its __init__ method must accept two new parameters: tls_verbose_logging and tls_ciphers (:issue:`2111`, :issue:`3392`, :issue:`3442`, :issue:`3450`)

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:class:`~scrapy.loader.ItemLoader` now turns the values of its input item into lists:

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```
>>> item = MyItem()
>>> item['field'] = 'value1'
>>> loader = ItemLoader(item=item)
>>> item['field']
['value1']
```
This is needed to allow adding values to existing fields (loader.add_value('field', 'value2')).

(:issue:`3804`, :issue:`3819`, :issue:`3897`, :issue:`3976`, :issue:`3998`, :issue:`4036`)

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See also :ref:`1.8-deprecation-removals` below.

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New features

A new :meth:`Request.from_curl <scrapy.http.Request.from_curl>` class method allows :ref:`creating a request from a cURL command <requests-from-curl>` (:issue:`2985`, :issue:`3862`)

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A new :setting:`ROBOTSTXT_PARSER` setting allows choosing which robots.txt parser to use. It includes built-in support for :ref:`RobotFileParser <python-robotfileparser>`, :ref:`Protego <protego-parser>` (default), :ref:`Reppy <reppy-parser>`, and :ref:`Robotexclusionrulesparser <rerp-parser>`, and allows you to :ref:`implement support for additional parsers <support-for-new-robots-parser>` (:issue:`754`, :issue:`2669`, :issue:`3796`, :issue:`3935`, :issue:`3969`, :issue:`4006`)

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A new :setting:`ROBOTSTXT_USER_AGENT` setting allows defining a separate user agent string to use for robots.txt parsing (:issue:`3931`, :issue:`3966`)

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:class:`~scrapy.spiders.Rule` no longer requires a :class:`LinkExtractor <scrapy.linkextractors.lxmlhtml.LxmlLinkExtractor>` parameter (:issue:`781`, :issue:`4016`)

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Use the new :setting:`DOWNLOADER_CLIENT_TLS_CIPHERS` setting to customize the TLS/SSL ciphers used by the default HTTP/1.1 downloader (:issue:`3392`, :issue:`3442`)

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Set the new :setting:`DOWNLOADER_CLIENT_TLS_VERBOSE_LOGGING` setting to True to enable debug-level messages about TLS connection parameters after establishing HTTPS connections (:issue:`2111`, :issue:`3450`)

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Callbacks that receive keyword arguments (see :attr:`Request.cb_kwargs <scrapy.http.Request.cb_kwargs>`) can now be tested using the new :class:`@cb_kwargs <scrapy.contracts.default.CallbackKeywordArgumentsContract>` :ref:`spider contract <topics-contracts>` (:issue:`3985`, :issue:`3988`)

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When a :class:`@scrapes <scrapy.contracts.default.ScrapesContract>` spider contract fails, all missing fields are now reported (:issue:`766`, :issue:`3939`)

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:ref:`Custom log formats <custom-log-formats>` can now drop messages by having the corresponding methods of the configured :setting:`LOG_FORMATTER` return None (:issue:`3984`, :issue:`3987`)

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A much improved completion definition is now available for Zsh (:issue:`4069`)

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Bug fixes

:meth:`ItemLoader.load_item() <scrapy.loader.ItemLoader.load_item>` no longer makes later calls to :meth:`ItemLoader.get_output_value() <scrapy.loader.ItemLoader.get_output_value>` or :meth:`ItemLoader.load_item() <scrapy.loader.ItemLoader.load_item>` return empty data (:issue:`3804`, :issue:`3819`, :issue:`3897`, :issue:`3976`, :issue:`3998`, :issue:`4036`)

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Fixed :class:`~scrapy.statscollectors.DummyStatsCollector` raising a :exc:`TypeError` exception (:issue:`4007`, :issue:`4052`)

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:meth:`FilesPipeline.file_path <scrapy.pipelines.files.FilesPipeline.file_path>` and :meth:`ImagesPipeline.file_path <scrapy.pipelines.images.ImagesPipeline.file_path>` no longer choose file extensions that are not registered with IANA (:issue:`1287`, :issue:`3953`, :issue:`3954`)

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When using botocore to persist files in S3, all botocore-supported headers are properly mapped now (:issue:`3904`, :issue:`3905`)

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FTP passwords in :setting:`FEED_URI` containing percent-escaped characters are now properly decoded (:issue:`3941`)

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A memory-handling and error-handling issue in :func:`scrapy.utils.ssl.get_temp_key_info` has been fixed (:issue:`3920`)

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Documentation

The documentation now covers how to define and configure a :ref:`custom log format <custom-log-formats>` (:issue:`3616`, :issue:`3660`)

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API documentation added for :class:`~scrapy.exporters.MarshalItemExporter` and :class:`~scrapy.exporters.PythonItemExporter` (:issue:`3973`)

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API documentation added for :class:`~scrapy.item.BaseItem` and :class:`~scrapy.item.ItemMeta` (:issue:`3999`)

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Minor documentation fixes (:issue:`2998`, :issue:`3398`, :issue:`3597`, :issue:`3894`, :issue:`3934`, :issue:`3978`, :issue:`3993`, :issue:`4022`, :issue:`4028`, :issue:`4033`, :issue:`4046`, :issue:`4050`, :issue:`4055`, :issue:`4056`, :issue:`4061`, :issue:`4072`, :issue:`4071`, :issue:`4079`, :issue:`4081`, :issue:`4089`, :issue:`4093`)

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Deprecation removals

scrapy.xlib has been removed (:issue:`4015`)

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Deprecations

The LevelDB storage backend (scrapy.extensions.httpcache.LeveldbCacheStorage) of :class:`~scrapy.downloadermiddlewares.httpcache.HttpCacheMiddleware` is deprecated (:issue:`4085`, :issue:`4092`)

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Use of the undocumented SCRAPY_PICKLED_SETTINGS_TO_OVERRIDE environment variable is deprecated (:issue:`3910`)

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scrapy.item.DictItem is deprecated, use :class:`~scrapy.item.Item` instead (:issue:`3999`)

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Other changes

Minimum versions of optional Scrapy requirements that are covered by continuous integration tests have been updated:
- botocore 1.3.23
- Pillow 3.4.2
Lower versions of these optional requirements may work, but it is not guaranteed (:issue:`3892`)

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GitHub templates for bug reports and feature requests (:issue:`3126`, :issue:`3471`, :issue:`3749`, :issue:`3754`)

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Continuous integration fixes (:issue:`3923`)

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Code cleanup (:issue:`3391`, :issue:`3907`, :issue:`3946`, :issue:`3950`, :issue:`4023`, :issue:`4031`)

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Scrapy 1.7.4 (2019-10-21)

Revert the fix for :issue:`3804` (:issue:`3819`), which has a few undesired side effects (:issue:`3897`, :issue:`3976`).

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As a result, when an item loader is initialized with an item, :meth:`ItemLoader.load_item() <scrapy.loader.ItemLoader.load_item>` once again makes later calls to :meth:`ItemLoader.get_output_value() <scrapy.loader.ItemLoader.get_output_value>` or :meth:`ItemLoader.load_item() <scrapy.loader.ItemLoader.load_item>` return empty data.

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Scrapy 1.7.3 (2019-08-01)

Enforce lxml 4.3.5 or lower for Python 3.4 (:issue:`3912`, :issue:`3918`).

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Scrapy 1.7.2 (2019-07-23)

Fix Python 2 support (:issue:`3889`, :issue:`3893`, :issue:`3896`).

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Scrapy 1.7.1 (2019-07-18)

Re-packaging of Scrapy 1.7.0, which was missing some changes in PyPI.

Scrapy 1.7.0 (2019-07-18)

Note

Make sure you install Scrapy 1.7.1. The Scrapy 1.7.0 package in PyPI is the result of an erroneous commit tagging and does not include all the changes described below.

Highlights:

Improvements for crawls targeting multiple domains
A cleaner way to pass arguments to callbacks
A new class for JSON requests
Improvements for rule-based spiders
New features for feed exports

Backward-incompatible changes

429 is now part of the :setting:`RETRY_HTTP_CODES` setting by default

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This change is backward incompatible. If you don’t want to retry 429, you must override :setting:`RETRY_HTTP_CODES` accordingly.

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:class:`~scrapy.crawler.Crawler`, :class:`CrawlerRunner.crawl <scrapy.crawler.CrawlerRunner.crawl>` and :class:`CrawlerRunner.create_crawler <scrapy.crawler.CrawlerRunner.create_crawler>` no longer accept a :class:`~scrapy.spiders.Spider` subclass instance, they only accept a :class:`~scrapy.spiders.Spider` subclass now.

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:class:`~scrapy.spiders.Spider` subclass instances were never meant to work, and they were not working as one would expect: instead of using the passed :class:`~scrapy.spiders.Spider` subclass instance, their :class:`~scrapy.spiders.Spider.from_crawler` method was called to generate a new instance.

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Non-default values for the :setting:`SCHEDULER_PRIORITY_QUEUE` setting may stop working. Scheduler priority queue classes now need to handle :class:`~scrapy.http.Request` objects instead of arbitrary Python data structures.

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An additional crawler parameter has been added to the __init__ method of the :class:`~scrapy.core.scheduler.Scheduler` class. Custom scheduler subclasses which don't accept arbitrary parameters in their __init__ method might break because of this change.

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For more information, see :setting:`SCHEDULER`.

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See also :ref:`1.7-deprecation-removals` below.

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New features

A new scheduler priority queue, scrapy.pqueues.DownloaderAwarePriorityQueue, may be :ref:`enabled <broad-crawls-scheduler-priority-queue>` for a significant scheduling improvement on crawls targeting multiple web domains, at the cost of no :setting:`CONCURRENT_REQUESTS_PER_IP` support (:issue:`3520`)

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A new :attr:`Request.cb_kwargs <scrapy.http.Request.cb_kwargs>` attribute provides a cleaner way to pass keyword arguments to callback methods (:issue:`1138`, :issue:`3563`)

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A new :class:`JSONRequest <scrapy.http.JsonRequest>` class offers a more convenient way to build JSON requests (:issue:`3504`, :issue:`3505`)

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A process_request callback passed to the :class:`~scrapy.spiders.Rule` __init__ method now receives the :class:`~scrapy.http.Response` object that originated the request as its second argument (:issue:`3682`)

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A new restrict_text parameter for the :attr:`LinkExtractor <scrapy.linkextractors.lxmlhtml.LxmlLinkExtractor>` __init__ method allows filtering links by linking text (:issue:`3622`, :issue:`3635`)

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A new :setting:`FEED_STORAGE_S3_ACL` setting allows defining a custom ACL for feeds exported to Amazon S3 (:issue:`3607`)

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A new :setting:`FEED_STORAGE_FTP_ACTIVE` setting allows using FTP’s active connection mode for feeds exported to FTP servers (:issue:`3829`)

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A new :setting:`METAREFRESH_IGNORE_TAGS` setting allows overriding which HTML tags are ignored when searching a response for HTML meta tags that trigger a redirect (:issue:`1422`, :issue:`3768`)

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A new :reqmeta:`redirect_reasons` request meta key exposes the reason (status code, meta refresh) behind every followed redirect (:issue:`3581`, :issue:`3687`)

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The SCRAPY_CHECK variable is now set to the true string during runs of the :command:`check` command, which allows :ref:`detecting contract check runs from code <detecting-contract-check-runs>` (:issue:`3704`, :issue:`3739`)

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A new :meth:`Item.deepcopy() <scrapy.item.Item.deepcopy>` method makes it easier to :ref:`deep-copy items <copying-items>` (:issue:`1493`, :issue:`3671`)

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:class:`~scrapy.extensions.corestats.CoreStats` also logs elapsed_time_seconds now (:issue:`3638`)

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Exceptions from :class:`~scrapy.loader.ItemLoader` :ref:`input and output processors <topics-loaders-processors>` are now more verbose (:issue:`3836`, :issue:`3840`)

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:class:`~scrapy.crawler.Crawler`, :class:`CrawlerRunner.crawl <scrapy.crawler.CrawlerRunner.crawl>` and :class:`CrawlerRunner.create_crawler <scrapy.crawler.CrawlerRunner.create_crawler>` now fail gracefully if they receive a :class:`~scrapy.spiders.Spider` subclass instance instead of the subclass itself (:issue:`2283`, :issue:`3610`, :issue:`3872`)

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Bug fixes

:meth:`~scrapy.spidermiddlewares.SpiderMiddleware.process_spider_exception` is now also invoked for generators (:issue:`220`, :issue:`2061`)

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System exceptions like KeyboardInterrupt are no longer caught (:issue:`3726`)

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:meth:`ItemLoader.load_item() <scrapy.loader.ItemLoader.load_item>` no longer makes later calls to :meth:`ItemLoader.get_output_value() <scrapy.loader.ItemLoader.get_output_value>` or :meth:`ItemLoader.load_item() <scrapy.loader.ItemLoader.load_item>` return empty data (:issue:`3804`, :issue:`3819`)

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The images pipeline (:class:`~scrapy.pipelines.images.ImagesPipeline`) no longer ignores these Amazon S3 settings: :setting:`AWS_ENDPOINT_URL`, :setting:`AWS_REGION_NAME`, :setting:`AWS_USE_SSL`, :setting:`AWS_VERIFY` (:issue:`3625`)

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Fixed a memory leak in scrapy.pipelines.media.MediaPipeline affecting, for example, non-200 responses and exceptions from custom middlewares (:issue:`3813`)

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Requests with private callbacks are now correctly unserialized from disk (:issue:`3790`)

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:meth:`FormRequest.from_response() <scrapy.http.FormRequest.from_response>` now handles invalid methods like major web browsers (:issue:`3777`, :issue:`3794`)

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Documentation

A new topic, :ref:`topics-dynamic-content`, covers recommended approaches to read dynamically-loaded data (:issue:`3703`)

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:ref:`topics-broad-crawls` now features information about memory usage (:issue:`1264`, :issue:`3866`)

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The documentation of :class:`~scrapy.spiders.Rule` now covers how to access the text of a link when using :class:`~scrapy.spiders.CrawlSpider` (:issue:`3711`, :issue:`3712`)

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A new section, :ref:`httpcache-storage-custom`, covers writing a custom cache storage backend for :class:`~scrapy.downloadermiddlewares.httpcache.HttpCacheMiddleware` (:issue:`3683`, :issue:`3692`)

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A new :ref:`FAQ <faq>` entry, :ref:`faq-split-item`, explains what to do when you want to split an item into multiple items from an item pipeline (:issue:`2240`, :issue:`3672`)

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Updated the :ref:`FAQ entry about crawl order <faq-bfo-dfo>` to explain why the first few requests rarely follow the desired order (:issue:`1739`, :issue:`3621`)

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The :setting:`LOGSTATS_INTERVAL` setting (:issue:`3730`), the :meth:`FilesPipeline.file_path <scrapy.pipelines.files.FilesPipeline.file_path>` and :meth:`ImagesPipeline.file_path <scrapy.pipelines.images.ImagesPipeline.file_path>` methods (:issue:`2253`, :issue:`3609`) and the :meth:`Crawler.stop() <scrapy.crawler.Crawler.stop>` method (:issue:`3842`) are now documented

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Some parts of the documentation that were confusing or misleading are now clearer (:issue:`1347`, :issue:`1789`, :issue:`2289`, :issue:`3069`, :issue:`3615`, :issue:`3626`, :issue:`3668`, :issue:`3670`, :issue:`3673`, :issue:`3728`, :issue:`3762`, :issue:`3861`, :issue:`3882`)

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System Message: ERROR/3 (<stdin>, line 2800); backlink

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Minor documentation fixes (:issue:`3648`, :issue:`3649`, :issue:`3662`, :issue:`3674`, :issue:`3676`, :issue:`3694`, :issue:`3724`, :issue:`3764`, :issue:`3767`, :issue:`3791`, :issue:`3797`, :issue:`3806`, :issue:`3812`)

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Deprecation removals

The following deprecated APIs have been removed (:issue:`3578`):

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scrapy.conf (use :attr:`Crawler.settings <scrapy.crawler.Crawler.settings>`)

System Message: ERROR/3 (<stdin>, line 2816); backlink

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From scrapy.core.downloader.handlers:
- http.HttpDownloadHandler (use http10.HTTP10DownloadHandler)
scrapy.loader.ItemLoader._get_values (use _get_xpathvalues)
scrapy.loader.XPathItemLoader (use :class:`~scrapy.loader.ItemLoader`)

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scrapy.log (see :ref:`topics-logging`)

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From scrapy.pipelines:
- files.FilesPipeline.file_key (use file_path)
- images.ImagesPipeline.file_key (use file_path)
- images.ImagesPipeline.image_key (use file_path)
- images.ImagesPipeline.thumb_key (use thumb_path)
From both scrapy.selector and scrapy.selector.lxmlsel:
- HtmlXPathSelector (use :class:`~scrapy.selector.Selector`)
  
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- XmlXPathSelector (use :class:`~scrapy.selector.Selector`)
  
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- XPathSelector (use :class:`~scrapy.selector.Selector`)
  
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- XPathSelectorList (use :class:`~scrapy.selector.Selector`)
  
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From scrapy.selector.csstranslator:
- ScrapyGenericTranslator (use parsel.csstranslator.GenericTranslator)
- ScrapyHTMLTranslator (use parsel.csstranslator.HTMLTranslator)
- ScrapyXPathExpr (use parsel.csstranslator.XPathExpr)
From :class:`~scrapy.selector.Selector`:

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- _root (both the __init__ method argument and the object property, use root)
- extract_unquoted (use getall)
- select (use xpath)
From :class:`~scrapy.selector.SelectorList`:

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- extract_unquoted (use getall)
- select (use xpath)
- x (use xpath)
scrapy.spiders.BaseSpider (use :class:`~scrapy.spiders.Spider`)

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From :class:`~scrapy.spiders.Spider` (and subclasses):

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- DOWNLOAD_DELAY (use :ref:`download_delay <spider-download_delay-attribute>`)
  
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- set_crawler (use :meth:`~scrapy.spiders.Spider.from_crawler`)
  
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scrapy.spiders.spiders (use :class:`~scrapy.spiderloader.SpiderLoader`)

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scrapy.telnet (use :mod:`scrapy.extensions.telnet`)

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From scrapy.utils.python:
- str_to_unicode (use to_unicode)
- unicode_to_str (use to_bytes)
scrapy.utils.response.body_or_str

The following deprecated settings have also been removed (:issue:`3578`):

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SPIDER_MANAGER_CLASS (use :setting:`SPIDER_LOADER_CLASS`)

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Deprecations

The queuelib.PriorityQueue value for the :setting:`SCHEDULER_PRIORITY_QUEUE` setting is deprecated. Use scrapy.pqueues.ScrapyPriorityQueue instead.

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process_request callbacks passed to :class:`~scrapy.spiders.Rule` that do not accept two arguments are deprecated.

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The following modules are deprecated:
- scrapy.utils.http (use w3lib.http)
- scrapy.utils.markup (use w3lib.html)
- scrapy.utils.multipart (use urllib3)
The scrapy.utils.datatypes.MergeDict class is deprecated for Python 3 code bases. Use :class:`~collections.ChainMap` instead. (:issue:`3878`)

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The scrapy.utils.gz.is_gzipped function is deprecated. Use scrapy.utils.gz.gzip_magic_number instead.

Other changes

It is now possible to run all tests from the same tox environment in parallel; the documentation now covers :ref:`this and other ways to run tests <running-tests>` (:issue:`3707`)

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It is now possible to generate an API documentation coverage report (:issue:`3806`, :issue:`3810`, :issue:`3860`)

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The :ref:`documentation policies <documentation-policies>` now require docstrings (:issue:`3701`) that follow PEP 257 (:issue:`3748`)

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Internal fixes and cleanup (:issue:`3629`, :issue:`3643`, :issue:`3684`, :issue:`3698`, :issue:`3734`, :issue:`3735`, :issue:`3736`, :issue:`3737`, :issue:`3809`, :issue:`3821`, :issue:`3825`, :issue:`3827`, :issue:`3833`, :issue:`3857`, :issue:`3877`)

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Scrapy 1.6.0 (2019-01-30)

Highlights:

better Windows support;
Python 3.7 compatibility;
big documentation improvements, including a switch from .extract_first() + .extract() 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.

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scrapy.contracts fixes and new features;
telnet console security improvements, first released as a backport in :ref:`release-1.5.2`;

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clean-up of the deprecated code;
various bug fixes, small new features and usability improvements across the codebase.

Selector API changes

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.

Most visible change is that .get() and .getall() selector 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.

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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`.

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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 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.

Telnet console

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.

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New extensibility features

from_crawler support is added to feed exporters and feed storages. This, among other things, allows to access Scrapy settings from custom feed storages and exporters (:issue:`1605`, :issue:`3348`).

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from_crawler support is added to dupefilters (:issue:`2956`); this allows to access e.g. settings or a spider from a dupefilter.

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:signal:`item_error` is fired when an error happens in a pipeline (:issue:`3256`);

System Message: ERROR/3 (<stdin>, line 3020); backlink

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:signal:`request_reached_downloader` is fired when Downloader gets a new Request; this signal can be useful e.g. for custom Schedulers (:issue:`3393`).

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new SitemapSpider :meth:`~.SitemapSpider.sitemap_filter` method which allows to select sitemap entries based on their attributes in SitemapSpider subclasses (:issue:`3512`).

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Lazy loading of Downloader Handlers is now optional; this enables better initialization error handling in custom Downloader Handlers (:issue:`3394`).

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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`, :issue:`3548`).

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ACL support for Google Cloud Storage: :setting:`FILES_STORE_GCS_ACL` and :setting:`IMAGES_STORE_GCS_ACL` (:issue:`3199`).

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`scrapy.contracts` improvements

Exceptions in contracts code are handled better (:issue:`3377`);

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dont_filter=True is used for contract requests, which allows to test different callbacks with the same URL (:issue:`3381`);

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request_cls attribute in Contract subclasses allow to use different Request classes in contracts, for example FormRequest (:issue:`3383`).

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Fixed errback handling in contracts, e.g. for cases where a contract is executed for URL which returns non-200 response (:issue:`3371`).

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Usability improvements

more stats for RobotsTxtMiddleware (:issue:`3100`)

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INFO log level is used to show telnet host/port (:issue:`3115`)

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a message is added to IgnoreRequest in RobotsTxtMiddleware (:issue:`3113`)

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better validation of url argument in Response.follow (:issue:`3131`)

System Message: ERROR/3 (<stdin>, line 3058); backlink

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non-zero exit code is returned from Scrapy commands when error happens on spider initialization (:issue:`3226`)

System Message: ERROR/3 (<stdin>, line 3059); backlink

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Link extraction improvements: "ftp" is added to scheme list (:issue:`3152`); "flv" is added to common video extensions (:issue:`3165`)

System Message: ERROR/3 (<stdin>, line 3061); backlink

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System Message: ERROR/3 (<stdin>, line 3061); backlink

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better error message when an exporter is disabled (:issue:`3358`);

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scrapy shell --help mentions syntax required for local files (./file.html) - :issue:`3496`.

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Referer header value is added to RFPDupeFilter log messages (:issue:`3588`)

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Bug fixes

fixed issue with extra blank lines in .csv exports under Windows (:issue:`3039`);

System Message: ERROR/3 (<stdin>, line 3071); backlink

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proper handling of pickling errors in Python 3 when serializing objects for disk queues (:issue:`3082`)

System Message: ERROR/3 (<stdin>, line 3073); backlink

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flags are now preserved when copying Requests (:issue:`3342`);

System Message: ERROR/3 (<stdin>, line 3075); backlink

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FormRequest.from_response clickdata shouldn't ignore elements with input[type=image] (:issue:`3153`).

System Message: ERROR/3 (<stdin>, line 3076); backlink

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FormRequest.from_response should preserve duplicate keys (:issue:`3247`)

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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`).

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:ref:`topics-developer-tools` is a new tutorial which replaces old Firefox and Firebug tutorials (:issue:`3400`).

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SCRAPY_PROJECT environment variable is documented (:issue:`3518`);

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troubleshooting section is added to install instructions (:issue:`3517`);

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improved links to beginner resources in the tutorial (:issue:`3367`, :issue:`3468`);

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fixed :setting:`RETRY_HTTP_CODES` default values in docs (:issue:`3335`);

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System Message: ERROR/3 (<stdin>, line 3094); backlink

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remove unused DEPTH_STATS option from docs (:issue:`3245`);

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other cleanups (:issue:`3347`, :issue:`3350`, :issue:`3445`, :issue:`3544`, :issue:`3605`).

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Deprecation removals

Compatibility shims for pre-1.0 Scrapy module names are removed (:issue:`3318`):

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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.

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Other deprecation removals:

Deprecated scrapy.interfaces.ISpiderManager is removed; please use scrapy.interfaces.ISpiderLoader.
Deprecated CrawlerSettings class is removed (:issue:`3327`).

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Deprecated Settings.overrides and Settings.defaults attributes are removed (:issue:`3327`, :issue:`3359`).

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Other improvements, cleanups

All Scrapy tests now pass on Windows; Scrapy testing suite is executed in a Windows environment on CI (:issue:`3315`).

System Message: ERROR/3 (<stdin>, line 3132); backlink

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Python 3.7 support (:issue:`3326`, :issue:`3150`, :issue:`3547`).

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Testing and CI fixes (:issue:`3526`, :issue:`3538`, :issue:`3308`, :issue:`3311`, :issue:`3309`, :issue:`3305`, :issue:`3210`, :issue:`3299`)

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System Message: ERROR/3 (<stdin>, line 3135); backlink

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System Message: ERROR/3 (<stdin>, line 3135); backlink

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scrapy.http.cookies.CookieJar.clear accepts "domain", "path" and "name" optional arguments (:issue:`3231`).

System Message: ERROR/3 (<stdin>, line 3137); backlink

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additional files are included to sdist (:issue:`3495`);

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code style fixes (:issue:`3405`, :issue:`3304`);

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unneeded .strip() call is removed (:issue:`3519`);

System Message: ERROR/3 (<stdin>, line 3141); backlink

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collections.deque is used to store MiddlewareManager methods instead of a list (:issue:`3476`)

System Message: ERROR/3 (<stdin>, line 3142); backlink

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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 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:`TELNETCONSOLE_PORT` out of its default value.

System Message: ERROR/3 (<stdin>, line 3155); backlink

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See :ref:`telnet console <topics-telnetconsole>` documentation for more info

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Backport CI build failure under GCE environment due to boto import error.

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`);

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skipping of TLS validation errors is improved (:issue:`3166`);

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Ctrl-C handling is fixed in Python 3.5+ (:issue:`3096`);

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testing fixes (:issue:`3092`, :issue:`3263`);

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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`).

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Scrapy 1.5.0 (2017-12-29)

This release brings small new features and improvements across the codebase. Some highlights:

Google Cloud Storage is supported in FilesPipeline and ImagesPipeline.
Crawling with proxy servers becomes more efficient, as connections to proxies can be reused now.
Warnings, exception and logging messages are improved to make debugging easier.
scrapy parse command now allows to set custom request meta via --meta argument.
Compatibility with Python 3.6, PyPy and PyPy3 is improved; PyPy and PyPy3 are now supported officially, by running tests on CI.
Better default handling of HTTP 308, 522 and 524 status codes.
Documentation is improved, as usual.

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 backward-incompatible; override :setting:`USER_AGENT` if you relied on old value.

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Logging of settings overridden by custom_settings is fixed; 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`).

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LinkExtractor now ignores m4v extension by default, this is change in behavior.
522 and 524 status codes are added to RETRY_HTTP_CODES (:issue:`2851`)

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New features

Support <link> tags in Response.follow (:issue:`2785`)

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Support for ptpython REPL (:issue:`2654`)

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Google Cloud Storage support for FilesPipeline and ImagesPipeline (:issue:`2923`).

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New --meta option of the "scrapy parse" command allows to pass additional request.meta (:issue:`2883`)

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Populate spider variable when using shell.inspect_response (:issue:`2812`)

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Handle HTTP 308 Permanent Redirect (:issue:`2844`)

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Add 522 and 524 to RETRY_HTTP_CODES (:issue:`2851`)

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Log versions information at startup (:issue:`2857`)

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scrapy.mail.MailSender now works in Python 3 (it requires Twisted 17.9.0)
Connections to proxy servers are reused (:issue:`2743`)

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Add template for a downloader middleware (:issue:`2755`)

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Explicit message for NotImplementedError when parse callback not defined (:issue:`2831`)

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CrawlerProcess got an option to disable installation of root log handler (:issue:`2921`)

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LinkExtractor now ignores m4v extension by default
Better log messages for responses over :setting:`DOWNLOAD_WARNSIZE` and :setting:`DOWNLOAD_MAXSIZE` limits (:issue:`2927`)

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Show warning when a URL is put to Spider.allowed_domains instead of a domain (:issue:`2250`).

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Bug fixes

Fix logging of settings overridden by custom_settings; 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`)

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Default Scrapy User-Agent now uses https link to scrapy.org (:issue:`2983`). This is technically backward-incompatible; override :setting:`USER_AGENT` if you relied on old value.

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Fix PyPy and PyPy3 test failures, support them officially (:issue:`2793`, :issue:`2935`, :issue:`2990`, :issue:`3050`, :issue:`2213`, :issue:`3048`)

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Fix DNS resolver when DNSCACHE_ENABLED=False (:issue:`2811`)

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Add cryptography for Debian Jessie tox test env (:issue:`2848`)

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Add verification to check if Request callback is callable (:issue:`2766`)

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Port extras/qpsclient.py to Python 3 (:issue:`2849`)

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Use getfullargspec under the scenes for Python 3 to stop DeprecationWarning (:issue:`2862`)

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Update deprecated test aliases (:issue:`2876`)

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Fix SitemapSpider support for alternate links (:issue:`2853`)

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Docs

Added missing bullet point for the AUTOTHROTTLE_TARGET_CONCURRENCY setting. (:issue:`2756`)

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Update Contributing docs, document new support channels (:issue:`2762`, issue:3038)

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Include references to Scrapy subreddit in the docs
Fix broken links; use https:// for external links (:issue:`2978`, :issue:`2982`, :issue:`2958`)

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Document CloseSpider extension better (:issue:`2759`)

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Use pymongo.collection.Collection.insert_one() in MongoDB example (:issue:`2781`)

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Spelling mistake and typos (:issue:`2828`, :issue:`2837`, :issue:`2884`, :issue:`2924`)

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Clarify CSVFeedSpider.headers documentation (:issue:`2826`)

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Document DontCloseSpider exception and clarify spider_idle (:issue:`2791`)

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Update "Releases" section in README (:issue:`2764`)

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Fix rst syntax in DOWNLOAD_FAIL_ON_DATALOSS docs (:issue:`2763`)

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Small fix in description of startproject arguments (:issue:`2866`)

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Clarify data types in Response.body docs (:issue:`2922`)

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Add a note about request.meta['depth'] to DepthMiddleware docs (:issue:`2374`)

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Add a note about request.meta['dont_merge_cookies'] to CookiesMiddleware docs (:issue:`2999`)

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Up-to-date example of project structure (:issue:`2964`, :issue:`2976`)

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A better example of ItemExporters usage (:issue:`2989`)

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Document from_crawler methods for spider and downloader middlewares (:issue:`3019`)

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Scrapy 1.4.0 (2017-05-18)

Scrapy 1.4 does not bring that many breathtaking new features but quite a few handy improvements nonetheless.

Scrapy now supports anonymous FTP sessions with customizable user and password via the new :setting:`FTP_USER` and :setting:`FTP_PASSWORD` settings. And if you're using Twisted version 17.1.0 or above, FTP is now available with Python 3.

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There's a new :meth:`response.follow <scrapy.http.TextResponse.follow>` method for creating requests; it is now a recommended way to create Requests in Scrapy spiders. This method makes it easier to write correct spiders; response.follow has several advantages over creating scrapy.Request objects directly:

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it handles relative URLs;
it works properly with non-ascii URLs on non-UTF8 pages;
in addition to absolute and relative URLs it supports Selectors; for <a> elements it can also extract their href values.

For example, instead of this:

for href in response.css('li.page a::attr(href)').extract():
    url = response.urljoin(href)
    yield scrapy.Request(url, self.parse, encoding=response.encoding)

One can now write this:

for a in response.css('li.page a'):
    yield response.follow(a, self.parse)

Link extractors are also improved. They work similarly to what a regular modern browser would do: leading and trailing whitespace are removed from attributes (think href=" http://example.com") when building Link objects. This whitespace-stripping also happens for action 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 extracted links.

For those of you wanting more control on the Referer: header that Scrapy sends when following links, you can set your own Referrer Policy. Prior to Scrapy 1.4, the default RefererMiddleware would simply and blindly set it to the URL of the response that generated the HTTP request (which could leak information on your URL seeds). By default, Scrapy now behaves much like your regular browser does. And this policy is fully customizable with W3C standard values (or with something really custom of your own if you wish). See :setting:`REFERRER_POLICY` for details.

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To make Scrapy spiders easier to debug, Scrapy logs more stats by default in 1.4: memory usage stats, detailed retry stats, detailed HTTP error code stats. A similar change is that HTTP cache path is also visible in logs now.

Last but not least, Scrapy now has the option to make JSON and XML items more human-readable, with newlines between items and even custom indenting offset, using the new :setting:`FEED_EXPORT_INDENT` setting.

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Enjoy! (Or read on for the rest of changes in this release.)

Deprecations and Backward Incompatible Changes

Default to canonicalize=False in :class:`scrapy.linkextractors.LinkExtractor <scrapy.linkextractors.lxmlhtml.LxmlLinkExtractor>` (:issue:`2537`, fixes :issue:`1941` and :issue:`1982`): warning, this is technically backward-incompatible

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Enable memusage extension by default (:issue:`2539`, fixes :issue:`2187`); this is technically backward-incompatible so please check if you have any non-default MEMUSAGE_*** options set.

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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 backward incompatible change.

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Spider.make_requests_from_url is deprecated (:issue:`1728`, fixes :issue:`1495`).

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New Features

Accept proxy credentials in :reqmeta:`proxy` request meta key (:issue:`2526`)

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Support brotli-compressed content; requires optional brotlipy (:issue:`2535`)

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New :ref:`response.follow <response-follow-example>` shortcut for creating requests (:issue:`1940`)

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Added flags argument and attribute to :class:`Request <scrapy.http.Request>` objects (:issue:`2047`)

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Support Anonymous FTP (:issue:`2342`)

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Added retry/count, retry/max_reached and retry/reason_count/<reason> stats to :class:`RetryMiddleware <scrapy.downloadermiddlewares.retry.RetryMiddleware>` (:issue:`2543`)

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Added httperror/response_ignored_count and httperror/response_ignored_status_count/<status> stats to :class:`HttpErrorMiddleware <scrapy.spidermiddlewares.httperror.HttpErrorMiddleware>` (:issue:`2566`)

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Customizable :setting:`Referrer policy <REFERRER_POLICY>` in :class:`RefererMiddleware <scrapy.spidermiddlewares.referer.RefererMiddleware>` (:issue:`2306`)

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New data: URI download handler (:issue:`2334`, fixes :issue:`2156`)

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Log cache directory when HTTP Cache is used (:issue:`2611`, fixes :issue:`2604`)

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Warn users when project contains duplicate spider names (fixes :issue:`2181`)

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scrapy.utils.datatypes.CaselessDict now accepts Mapping instances and not only dicts (:issue:`2646`)

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:ref:`Media downloads <topics-media-pipeline>`, with :class:`~scrapy.pipelines.files.FilesPipeline` or :class:`~scrapy.pipelines.images.ImagesPipeline`, can now optionally handle HTTP redirects using the new :setting:`MEDIA_ALLOW_REDIRECTS` setting (:issue:`2616`, fixes :issue:`2004`)

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Accept non-complete responses from websites using a new :setting:`DOWNLOAD_FAIL_ON_DATALOSS` setting (:issue:`2590`, fixes :issue:`2586`)

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Optional pretty-printing of JSON and XML items via :setting:`FEED_EXPORT_INDENT` setting (:issue:`2456`, fixes :issue:`1327`)

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Allow dropping fields in FormRequest.from_response formdata when None value is passed (:issue:`667`)

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Per-request retry times with the new :reqmeta:`max_retry_times` meta key (:issue:`2642`)

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python -m scrapy as a more explicit alternative to scrapy command (:issue:`2740`)

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Bug fixes

LinkExtractor now strips leading and trailing whitespaces from attributes (:issue:`2547`, fixes :issue:`1614`)

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Properly handle whitespaces in action attribute in :class:`~scrapy.http.FormRequest` (:issue:`2548`)

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Buffer CONNECT response bytes from proxy until all HTTP headers are received (:issue:`2495`, fixes :issue:`2491`)

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FTP downloader now works on Python 3, provided you use Twisted>=17.1 (:issue:`2599`)

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Use body to choose response type after decompressing content (:issue:`2393`, fixes :issue:`2145`)

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Always decompress Content-Encoding: gzip at :class:`HttpCompressionMiddleware <scrapy.downloadermiddlewares.httpcompression.HttpCompressionMiddleware>` stage (:issue:`2391`)

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Respect custom log level in Spider.custom_settings (:issue:`2581`, fixes :issue:`1612`)

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'make htmlview' fix for macOS (:issue:`2661`)

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Remove "commands" from the command list (:issue:`2695`)

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Fix duplicate Content-Length header for POST requests with empty body (:issue:`2677`)

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Properly cancel large downloads, i.e. above :setting:`DOWNLOAD_MAXSIZE` (:issue:`1616`)

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ImagesPipeline: fixed processing of transparent PNG images with palette (:issue:`2675`)

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Cleanups & Refactoring

Tests: remove temp files and folders (:issue:`2570`), fixed ProjectUtilsTest on macOS (:issue:`2569`), use portable pypy for Linux on Travis CI (:issue:`2710`)

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Separate building request from _requests_to_follow in CrawlSpider (:issue:`2562`)

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Remove “Python 3 progress” badge (:issue:`2567`)

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Add a couple more lines to .gitignore (:issue:`2557`)

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Remove bumpversion prerelease configuration (:issue:`2159`)

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Add codecov.yml file (:issue:`2750`)

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Set context factory implementation based on Twisted version (:issue:`2577`, fixes :issue:`2560`)

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Add omitted self arguments in default project middleware template (:issue:`2595`)

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Remove redundant slot.add_request() call in ExecutionEngine (:issue:`2617`)

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Catch more specific os.error exception in scrapy.pipelines.files.FSFilesStore (:issue:`2644`)

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Change "localhost" test server certificate (:issue:`2720`)

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Remove unused MEMUSAGE_REPORT setting (:issue:`2576`)

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Documentation

Binary mode is required for exporters (:issue:`2564`, fixes :issue:`2553`)

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System Message: ERROR/3 (<stdin>, line 3470); backlink

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Mention issue with :meth:`FormRequest.from_response <scrapy.http.FormRequest.from_response>` due to bug in lxml (:issue:`2572`)

System Message: ERROR/3 (<stdin>, line 3471); backlink

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System Message: ERROR/3 (<stdin>, line 3471); backlink

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Use single quotes uniformly in templates (:issue:`2596`)

System Message: ERROR/3 (<stdin>, line 3473); backlink

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Document :reqmeta:`ftp_user` and :reqmeta:`ftp_password` meta keys (:issue:`2587`)

System Message: ERROR/3 (<stdin>, line 3474); backlink

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System Message: ERROR/3 (<stdin>, line 3474); backlink

Unknown interpreted text role "reqmeta".

System Message: ERROR/3 (<stdin>, line 3474); backlink

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Removed section on deprecated contrib/ (:issue:`2636`)

System Message: ERROR/3 (<stdin>, line 3475); backlink

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Recommend Anaconda when installing Scrapy on Windows (:issue:`2477`, fixes :issue:`2475`)

System Message: ERROR/3 (<stdin>, line 3476); backlink

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System Message: ERROR/3 (<stdin>, line 3476); backlink

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FAQ: rewrite note on Python 3 support on Windows (:issue:`2690`)

System Message: ERROR/3 (<stdin>, line 3478); backlink

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Rearrange selector sections (:issue:`2705`)

System Message: ERROR/3 (<stdin>, line 3479); backlink

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Remove __nonzero__ from :class:`~scrapy.selector.SelectorList` docs (:issue:`2683`)

System Message: ERROR/3 (<stdin>, line 3480); backlink

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System Message: ERROR/3 (<stdin>, line 3480); backlink

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Mention how to disable request filtering in documentation of :setting:`DUPEFILTER_CLASS` setting (:issue:`2714`)

System Message: ERROR/3 (<stdin>, line 3482); backlink

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System Message: ERROR/3 (<stdin>, line 3482); backlink

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Add sphinx_rtd_theme to docs setup readme (:issue:`2668`)

System Message: ERROR/3 (<stdin>, line 3484); backlink

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Open file in text mode in JSON item writer example (:issue:`2729`)

System Message: ERROR/3 (<stdin>, line 3485); backlink

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Clarify allowed_domains example (:issue:`2670`)

System Message: ERROR/3 (<stdin>, line 3486); backlink

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Scrapy 1.3.3 (2017-03-10)

Bug fixes

Make SpiderLoader raise ImportError again by default for missing dependencies and wrong :setting:`SPIDER_MODULES`. These exceptions were silenced as warnings since 1.3.0. A new setting is introduced to toggle between warning or exception if needed ; see :setting:`SPIDER_LOADER_WARN_ONLY` for details.

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System Message: ERROR/3 (<stdin>, line 3497); backlink

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Scrapy 1.3.2 (2017-02-13)

Bug fixes

Preserve request class when converting to/from dicts (utils.reqser) (:issue:`2510`).

System Message: ERROR/3 (<stdin>, line 3511); backlink

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Use consistent selectors for author field in tutorial (:issue:`2551`).

System Message: ERROR/3 (<stdin>, line 3512); backlink

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Fix TLS compatibility in Twisted 17+ (:issue:`2558`)

System Message: ERROR/3 (<stdin>, line 3513); backlink

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Scrapy 1.3.1 (2017-02-08)

New features

Support 'True' and 'False' string values for boolean settings (:issue:`2519`); you can now do something like scrapy crawl myspider -s REDIRECT_ENABLED=False.

System Message: ERROR/3 (<stdin>, line 3523); backlink

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Support kwargs with response.xpath() to use :ref:`XPath variables <topics-selectors-xpath-variables>` and ad-hoc namespaces declarations ; this requires at least Parsel v1.1 (:issue:`2457`).

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Add support for Python 3.6 (:issue:`2485`).

System Message: ERROR/3 (<stdin>, line 3528); backlink

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Run tests on PyPy (warning: some tests still fail, so PyPy is not supported yet).

Bug fixes

Enforce DNS_TIMEOUT setting (:issue:`2496`).

System Message: ERROR/3 (<stdin>, line 3534); backlink

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Fix :command:`view` command ; it was a regression in v1.3.0 (:issue:`2503`).

System Message: ERROR/3 (<stdin>, line 3535); backlink

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System Message: ERROR/3 (<stdin>, line 3535); backlink

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Fix tests regarding *_EXPIRES settings with Files/Images pipelines (:issue:`2460`).

System Message: ERROR/3 (<stdin>, line 3536); backlink

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Fix name of generated pipeline class when using basic project template (:issue:`2466`).

System Message: ERROR/3 (<stdin>, line 3537); backlink

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Fix compatibility with Twisted 17+ (:issue:`2496`, :issue:`2528`).

System Message: ERROR/3 (<stdin>, line 3538); backlink

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System Message: ERROR/3 (<stdin>, line 3538); backlink

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Fix scrapy.Item inheritance on Python 3.6 (:issue:`2511`).

System Message: ERROR/3 (<stdin>, line 3539); backlink

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Enforce numeric values for components order in SPIDER_MIDDLEWARES, DOWNLOADER_MIDDLEWARES, EXTENSIONS and SPIDER_CONTRACTS (:issue:`2420`).

System Message: ERROR/3 (<stdin>, line 3540); backlink

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Documentation

Reword Code of Conduct section and upgrade to Contributor Covenant v1.4 (:issue:`2469`).

System Message: ERROR/3 (<stdin>, line 3546); backlink

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Clarify that passing spider arguments converts them to spider attributes (:issue:`2483`).

System Message: ERROR/3 (<stdin>, line 3548); backlink

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Document formid argument on FormRequest.from_response() (:issue:`2497`).

System Message: ERROR/3 (<stdin>, line 3550); backlink

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Add .rst extension to README files (:issue:`2507`).

System Message: ERROR/3 (<stdin>, line 3551); backlink

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Mention LevelDB cache storage backend (:issue:`2525`).

System Message: ERROR/3 (<stdin>, line 3552); backlink

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Use yield in sample callback code (:issue:`2533`).

System Message: ERROR/3 (<stdin>, line 3553); backlink

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Add note about HTML entities decoding with .re()/.re_first() (:issue:`1704`).

System Message: ERROR/3 (<stdin>, line 3554); backlink

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Typos (:issue:`2512`, :issue:`2534`, :issue:`2531`).

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System Message: ERROR/3 (<stdin>, line 3555); backlink

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System Message: ERROR/3 (<stdin>, line 3555); backlink

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Cleanups

Remove redundant check in MetaRefreshMiddleware (:issue:`2542`).

System Message: ERROR/3 (<stdin>, line 3560); backlink

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Faster checks in LinkExtractor for allow/deny patterns (:issue:`2538`).

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Remove dead code supporting old Twisted versions (:issue:`2544`).

System Message: ERROR/3 (<stdin>, line 3562); backlink

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Scrapy 1.3.0 (2016-12-21)

This release comes rather soon after 1.2.2 for one main reason: it was found out that releases since 0.18 up to 1.2.2 (included) use some backported code from Twisted (scrapy.xlib.tx.*), even if newer Twisted modules are available. Scrapy now uses twisted.web.client and twisted.internet.endpoints directly. (See also cleanups below.)

As it is a major change, we wanted to get the bug fix out quickly while not breaking any projects using the 1.2 series.

New Features

MailSender now accepts single strings as values for to and cc arguments (:issue:`2272`)

System Message: ERROR/3 (<stdin>, line 3583); backlink

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scrapy fetch url, scrapy shell url and fetch(url) inside Scrapy shell now follow HTTP redirections by default (:issue:`2290`); See :command:`fetch` and :command:`shell` for details.

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System Message: ERROR/3 (<stdin>, line 3585); backlink

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System Message: ERROR/3 (<stdin>, line 3585); backlink

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HttpErrorMiddleware now logs errors with INFO level instead of DEBUG; 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 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.

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Dependencies & Cleanups

Scrapy now requires Twisted >= 13.1 which is the case for many Linux distributions already.
As a consequence, we got rid of scrapy.xlib.tx.* modules, which copied some of Twisted code for users stuck with an "old" Twisted version
ChunkedTransferMiddleware is deprecated and removed from the default downloader middlewares.

Scrapy 1.2.3 (2017-03-03)

Packaging fix: disallow unsupported Twisted versions in setup.py

Scrapy 1.2.2 (2016-12-06)

Bug fixes

Fix a cryptic traceback when a pipeline fails on open_spider() (:issue:`2011`)

System Message: ERROR/3 (<stdin>, line 3622); backlink

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Fix embedded IPython shell variables (fixing :issue:`396` that re-appeared in 1.2.0, fixed in :issue:`2418`)

System Message: ERROR/3 (<stdin>, line 3623); backlink

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System Message: ERROR/3 (<stdin>, line 3623); backlink

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A couple of patches when dealing with robots.txt:
- handle (non-standard) relative sitemap URLs (:issue:`2390`)
  
  System Message: ERROR/3 (<stdin>, line 3627); backlink
  
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- handle non-ASCII URLs and User-Agents in Python 2 (:issue:`2373`)
  
  System Message: ERROR/3 (<stdin>, line 3628); backlink
  
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Documentation

Document "download_latency" key in Request's meta dict (:issue:`2033`)

System Message: ERROR/3 (<stdin>, line 3633); backlink

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Remove page on (deprecated & unsupported) Ubuntu packages from ToC (:issue:`2335`)

System Message: ERROR/3 (<stdin>, line 3634); backlink

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A few fixed typos (:issue:`2346`, :issue:`2369`, :issue:`2369`, :issue:`2380`) and clarifications (:issue:`2354`, :issue:`2325`, :issue:`2414`)

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System Message: ERROR/3 (<stdin>, line 3635); backlink

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System Message: ERROR/3 (<stdin>, line 3635); backlink

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System Message: ERROR/3 (<stdin>, line 3635); backlink

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System Message: ERROR/3 (<stdin>, line 3635); backlink

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System Message: ERROR/3 (<stdin>, line 3635); backlink

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Other changes

Advertize conda-forge as Scrapy's official conda channel (:issue:`2387`)

System Message: ERROR/3 (<stdin>, line 3641); backlink

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More helpful error messages when trying to use .css() or .xpath() on non-Text Responses (:issue:`2264`)

System Message: ERROR/3 (<stdin>, line 3642); backlink

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startproject command now generates a sample middlewares.py file (:issue:`2335`)

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Add more dependencies' version info in scrapy version verbose output (:issue:`2404`)

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Remove all *.pyc files from source distribution (:issue:`2386`)

System Message: ERROR/3 (<stdin>, line 3646); backlink

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Scrapy 1.2.1 (2016-10-21)

Bug fixes

Include OpenSSL's more permissive default ciphers when establishing TLS/SSL connections (:issue:`2314`).

System Message: ERROR/3 (<stdin>, line 3659); backlink

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Fix "Location" HTTP header decoding on non-ASCII URL redirects (:issue:`2321`).

System Message: ERROR/3 (<stdin>, line 3661); backlink

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Documentation

Fix JsonWriterPipeline example (:issue:`2302`).

System Message: ERROR/3 (<stdin>, line 3666); backlink

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Various notes: :issue:`2330` on spider names, :issue:`2329` on middleware methods processing order, :issue:`2327` on getting multi-valued HTTP headers as lists.

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System Message: ERROR/3 (<stdin>, line 3667); backlink

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Other changes

Removed www. from start_urls in built-in spider templates (:issue:`2299`).

System Message: ERROR/3 (<stdin>, line 3674); backlink

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Scrapy 1.2.0 (2016-10-03)

New Features

New :setting:`FEED_EXPORT_ENCODING` setting to customize the encoding used when writing items to a file. This can be used to turn off \uXXXX escapes in JSON output. This is also useful for those wanting something else than UTF-8 for XML or CSV output (:issue:`2034`).

System Message: ERROR/3 (<stdin>, line 3685); backlink

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System Message: ERROR/3 (<stdin>, line 3685); backlink

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startproject command now supports an optional destination directory to override the default one based on the project name (:issue:`2005`).

System Message: ERROR/3 (<stdin>, line 3690); backlink

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New :setting:`SCHEDULER_DEBUG` setting to log requests serialization failures (:issue:`1610`).

System Message: ERROR/3 (<stdin>, line 3692); backlink

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System Message: ERROR/3 (<stdin>, line 3692); backlink

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JSON encoder now supports serialization of set instances (:issue:`2058`).

System Message: ERROR/3 (<stdin>, line 3694); backlink

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Interpret application/json-amazonui-streaming as TextResponse (:issue:`1503`).

System Message: ERROR/3 (<stdin>, line 3695); backlink

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scrapy is imported by default when using shell tools (:command:`shell`, :ref:`inspect_response <topics-shell-inspect-response>`) (:issue:`2248`).

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System Message: ERROR/3 (<stdin>, line 3696); backlink

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System Message: ERROR/3 (<stdin>, line 3696); backlink

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Bug fixes

DefaultRequestHeaders middleware now runs before UserAgent middleware (:issue:`2088`). Warning: this is technically backward incompatible, though we consider this a bug fix.

System Message: ERROR/3 (<stdin>, line 3702); backlink

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HTTP cache extension and plugins that use the .scrapy data directory now work outside projects (:issue:`1581`). Warning: this is technically backward incompatible, though we consider this a bug fix.

System Message: ERROR/3 (<stdin>, line 3705); backlink

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Selector does not allow passing both response and text anymore (:issue:`2153`).

System Message: ERROR/3 (<stdin>, line 3708); backlink

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Fixed logging of wrong callback name with scrapy parse (:issue:`2169`).

System Message: ERROR/3 (<stdin>, line 3710); backlink

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Fix for an odd gzip decompression bug (:issue:`1606`).

System Message: ERROR/3 (<stdin>, line 3711); backlink

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Fix for selected callbacks when using CrawlSpider with :command:`scrapy parse <parse>` (:issue:`2225`).

System Message: ERROR/3 (<stdin>, line 3712); backlink

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System Message: ERROR/3 (<stdin>, line 3712); backlink

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Fix for invalid JSON and XML files when spider yields no items (:issue:`872`).

System Message: ERROR/3 (<stdin>, line 3714); backlink

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Implement flush() for StreamLogger avoiding a warning in logs (:issue:`2125`).

System Message: ERROR/3 (<stdin>, line 3715); backlink

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Refactoring

canonicalize_url has been moved to w3lib.url (:issue:`2168`).

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Tests & Requirements

Scrapy's new requirements baseline is Debian 8 "Jessie". It was previously Ubuntu 12.04 Precise. What this means in practice is that we run continuous integration tests with these (main) packages versions at a minimum: Twisted 14.0, pyOpenSSL 0.14, lxml 3.4.

Scrapy may very well work with older versions of these packages (the code base still has switches for older Twisted versions for example) but it is not guaranteed (because it's not tested anymore).

Documentation

Grammar fixes: :issue:`2128`, :issue:`1566`.

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System Message: ERROR/3 (<stdin>, line 3740); backlink

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Download stats badge removed from README (:issue:`2160`).

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New Scrapy :ref:`architecture diagram <topics-architecture>` (:issue:`2165`).

System Message: ERROR/3 (<stdin>, line 3742); backlink

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System Message: ERROR/3 (<stdin>, line 3742); backlink

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Updated Response parameters documentation (:issue:`2197`).

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Reworded misleading :setting:`RANDOMIZE_DOWNLOAD_DELAY` description (:issue:`2190`).

System Message: ERROR/3 (<stdin>, line 3744); backlink

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System Message: ERROR/3 (<stdin>, line 3744); backlink

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Add StackOverflow as a support channel (:issue:`2257`).

System Message: ERROR/3 (<stdin>, line 3745); backlink

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Scrapy 1.1.4 (2017-03-03)

Packaging fix: disallow unsupported Twisted versions in setup.py

Scrapy 1.1.3 (2016-09-22)

Bug fixes

Class attributes for subclasses of ImagesPipeline and FilesPipeline work as they did before 1.1.1 (:issue:`2243`, fixes :issue:`2198`)

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Documentation

:ref:`Overview <intro-overview>` and :ref:`tutorial <intro-tutorial>` rewritten to use http://toscrape.com websites (:issue:`2236`, :issue:`2249`, :issue:`2252`).

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System Message: ERROR/3 (<stdin>, line 3768); backlink

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System Message: ERROR/3 (<stdin>, line 3768); backlink

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Scrapy 1.1.2 (2016-08-18)

Bug fixes

Introduce a missing :setting:`IMAGES_STORE_S3_ACL` setting to override the default ACL policy in ImagesPipeline when uploading images to S3 (note that default ACL policy is "private" -- instead of "public-read" -- since Scrapy 1.1.0)

System Message: ERROR/3 (<stdin>, line 3780); backlink

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:setting:`IMAGES_EXPIRES` default value set back to 90 (the regression was introduced in 1.1.1)

System Message: ERROR/3 (<stdin>, line 3784); backlink

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Scrapy 1.1.1 (2016-07-13)

Bug fixes

Add "Host" header in CONNECT requests to HTTPS proxies (:issue:`2069`)

System Message: ERROR/3 (<stdin>, line 3795); backlink

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Use response body when choosing response class (:issue:`2001`, fixes :issue:`2000`)

System Message: ERROR/3 (<stdin>, line 3796); backlink

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System Message: ERROR/3 (<stdin>, line 3796); backlink

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Do not fail on canonicalizing URLs with wrong netlocs (:issue:`2038`, fixes :issue:`2010`)

System Message: ERROR/3 (<stdin>, line 3798); backlink

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System Message: ERROR/3 (<stdin>, line 3798); backlink

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a few fixes for HttpCompressionMiddleware (and SitemapSpider):
- Do not decode HEAD responses (:issue:`2008`, fixes :issue:`1899`)
  
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  System Message: ERROR/3 (<stdin>, line 3802); backlink
  
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- Handle charset parameter in gzip Content-Type header (:issue:`2050`, fixes :issue:`2049`)
  
  System Message: ERROR/3 (<stdin>, line 3803); backlink
  
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  System Message: ERROR/3 (<stdin>, line 3803); backlink
  
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- Do not decompress gzip octet-stream responses (:issue:`2065`, fixes :issue:`2063`)
  
  System Message: ERROR/3 (<stdin>, line 3805); backlink
  
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  System Message: ERROR/3 (<stdin>, line 3805); backlink
  
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Catch (and ignore with a warning) exception when verifying certificate against IP-address hosts (:issue:`2094`, fixes :issue:`2092`)

System Message: ERROR/3 (<stdin>, line 3808); backlink

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System Message: ERROR/3 (<stdin>, line 3808); backlink

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Make FilesPipeline and ImagesPipeline backward compatible again regarding the use of legacy class attributes for customization (:issue:`1989`, fixes :issue:`1985`)

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System Message: ERROR/3 (<stdin>, line 3810); backlink

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New features

Enable genspider command outside project folder (:issue:`2052`)

System Message: ERROR/3 (<stdin>, line 3818); backlink

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Retry HTTPS CONNECT TunnelError by default (:issue:`1974`)

System Message: ERROR/3 (<stdin>, line 3819); backlink

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Documentation

FEED_TEMPDIR setting at lexicographical position (:commit:`9b3c72c`)

System Message: ERROR/3 (<stdin>, line 3825); backlink

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Use idiomatic .extract_first() in overview (:issue:`1994`)

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Update years in copyright notice (:commit:`c2c8036`)

System Message: ERROR/3 (<stdin>, line 3827); backlink

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Add information and example on errbacks (:issue:`1995`)

System Message: ERROR/3 (<stdin>, line 3828); backlink

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Use "url" variable in downloader middleware example (:issue:`2015`)

System Message: ERROR/3 (<stdin>, line 3829); backlink

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Grammar fixes (:issue:`2054`, :issue:`2120`)

System Message: ERROR/3 (<stdin>, line 3830); backlink

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System Message: ERROR/3 (<stdin>, line 3830); backlink

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New FAQ entry on using BeautifulSoup in spider callbacks (:issue:`2048`)

System Message: ERROR/3 (<stdin>, line 3831); backlink

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Add notes about Scrapy not working on Windows with Python 3 (:issue:`2060`)

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Encourage complete titles in pull requests (:issue:`2026`)

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Tests

Upgrade py.test requirement on Travis CI and Pin pytest-cov to 2.2.1 (:issue:`2095`)

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Scrapy 1.1.0 (2016-05-11)

This 1.1 release brings a lot of interesting features and bug fixes:

Scrapy 1.1 has beta Python 3 support (requires Twisted >= 15.5). See :ref:`news_betapy3` for more details and some limitations.

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Hot new features:
- Item loaders now support nested loaders (:issue:`1467`).
  
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- FormRequest.from_response improvements (:issue:`1382`, :issue:`1137`).
  
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- Added setting :setting:`AUTOTHROTTLE_TARGET_CONCURRENCY` and improved AutoThrottle docs (:issue:`1324`).
  
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- Added response.text to get body as unicode (:issue:`1730`).
  
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- Anonymous S3 connections (:issue:`1358`).
  
  System Message: ERROR/3 (<stdin>, line 3856); backlink
  
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- Deferreds in downloader middlewares (:issue:`1473`). This enables better robots.txt handling (:issue:`1471`).
  
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- HTTP caching now follows RFC2616 more closely, added settings :setting:`HTTPCACHE_ALWAYS_STORE` and :setting:`HTTPCACHE_IGNORE_RESPONSE_CACHE_CONTROLS` (:issue:`1151`).
  
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- Selectors were extracted to the parsel library (:issue:`1409`). This means you can use Scrapy Selectors without Scrapy and also upgrade the selectors engine without needing to upgrade Scrapy.
  
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- HTTPS downloader now does TLS protocol negotiation by default, instead of forcing TLS 1.0. You can also set the SSL/TLS method using the new :setting:`DOWNLOADER_CLIENT_TLS_METHOD`.
  
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These bug fixes may require your attention:
- Don't retry bad requests (HTTP 400) by default (:issue:`1289`). If you need the old behavior, add 400 to :setting:`RETRY_HTTP_CODES`.
  
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- Fix shell files argument handling (:issue:`1710`, :issue:`1550`). If you try scrapy shell index.html it will try to load the URL http://index.html, use scrapy shell ./index.html to load a local file.
  
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- Robots.txt compliance is now enabled by default for newly-created projects (:issue:`1724`). Scrapy will also wait for robots.txt to be downloaded before proceeding with the crawl (:issue:`1735`). If you want to disable this behavior, update :setting:`ROBOTSTXT_OBEY` in settings.py file after creating a new project.
  
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- Exporters now work on unicode, instead of bytes by default (:issue:`1080`). If you use :class:`~scrapy.exporters.PythonItemExporter`, you may want to update your code to disable binary mode which is now deprecated.
  
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- Accept XML node names containing dots as valid (:issue:`1533`).
  
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- When uploading files or images to S3 (with FilesPipeline or ImagesPipeline), the default ACL policy is now "private" instead of "public" Warning: backward incompatible!. You can use :setting:`FILES_STORE_S3_ACL` to change it.
  
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- 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: backward incompatible!.
  
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Keep reading for more details on other improvements and bug fixes.

Beta Python 3 Support

We have been hard at work to make Scrapy run on Python 3. As a result, now you can run spiders on Python 3.3, 3.4 and 3.5 (Twisted >= 15.5 required). Some features are still missing (and some may never be ported).

Almost all builtin extensions/middlewares are expected to work. However, we are aware of some limitations in Python 3:

Scrapy does not work on Windows with Python 3
Sending emails is not supported
FTP download handler is not supported
Telnet console is not supported

Additional New Features and Enhancements

Scrapy now has a Code of Conduct (:issue:`1681`).

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Command line tool now has completion for zsh (:issue:`934`).

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Improvements to scrapy shell:
- Support for bpython and configure preferred Python shell via SCRAPY_PYTHON_SHELL (:issue:`1100`, :issue:`1444`).
  
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- Support URLs without scheme (:issue:`1498`) Warning: backward incompatible!
  
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- Bring back support for relative file path (:issue:`1710`, :issue:`1550`).
  
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Added :setting:`MEMUSAGE_CHECK_INTERVAL_SECONDS` setting to change default check interval (:issue:`1282`).

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Download handlers are now lazy-loaded on first request using their scheme (:issue:`1390`, :issue:`1421`).

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HTTPS download handlers do not force TLS 1.0 anymore; instead, OpenSSL's SSLv23_method()/TLS_method() is used allowing to try negotiating with the remote hosts the highest TLS protocol version it can (:issue:`1794`, :issue:`1629`).

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RedirectMiddleware now skips the status codes from handle_httpstatus_list on spider attribute or in Request's meta key (:issue:`1334`, :issue:`1364`, :issue:`1447`).

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Form submission:
- now works with <button> elements too (:issue:`1469`).
  
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- an empty string is now used for submit buttons without a value (:issue:`1472`)
  
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Dict-like settings now have per-key priorities (:issue:`1135`, :issue:`1149` and :issue:`1586`).

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Sending non-ASCII emails (:issue:`1662`)

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CloseSpider and SpiderState extensions now get disabled if no relevant setting is set (:issue:`1723`, :issue:`1725`).

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Added method ExecutionEngine.close (:issue:`1423`).

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Added method CrawlerRunner.create_crawler (:issue:`1528`).

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Scheduler priority queue can now be customized via :setting:`SCHEDULER_PRIORITY_QUEUE` (:issue:`1822`).

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.pps links are now ignored by default in link extractors (:issue:`1835`).

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temporary data folder for FTP and S3 feed storages can be customized using a new :setting:`FEED_TEMPDIR` setting (:issue:`1847`).

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FilesPipeline and ImagesPipeline settings are now instance attributes instead of class attributes, enabling spider-specific behaviors (:issue:`1891`).

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JsonItemExporter now formats opening and closing square brackets on their own line (first and last lines of output file) (:issue:`1950`).

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If available, botocore is used for S3FeedStorage, S3DownloadHandler and S3FilesStore (:issue:`1761`, :issue:`1883`).

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Tons of documentation updates and related fixes (:issue:`1291`, :issue:`1302`, :issue:`1335`, :issue:`1683`, :issue:`1660`, :issue:`1642`, :issue:`1721`, :issue:`1727`, :issue:`1879`).

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Other refactoring, optimizations and cleanup (:issue:`1476`, :issue:`1481`, :issue:`1477`, :issue:`1315`, :issue:`1290`, :issue:`1750`, :issue:`1881`).

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Deprecations and Removals

Added to_bytes and to_unicode, deprecated str_to_unicode and unicode_to_str functions (:issue:`778`).

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binary_is_text is introduced, to replace use of isbinarytext (but with inverse return value) (:issue:`1851`)

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The optional_features set has been removed (:issue:`1359`).

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The --lsprof command line option has been removed (:issue:`1689`). Warning: backward incompatible, but doesn't break user code.

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The following datatypes were deprecated (:issue:`1720`):

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- scrapy.utils.datatypes.MultiValueDictKeyError
- scrapy.utils.datatypes.MultiValueDict
- scrapy.utils.datatypes.SiteNode
The previously bundled scrapy.xlib.pydispatch library was deprecated and replaced by pydispatcher.

Relocations

telnetconsole was relocated to extensions/ (:issue:`1524`).

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- Note: telnet is not enabled on Python 3 (https://github.com/scrapy/scrapy/pull/1524#issuecomment-146985595)

Bugfixes

Scrapy does not retry requests that got a HTTP 400 Bad Request response anymore (:issue:`1289`). Warning: backward incompatible!

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Support empty password for http_proxy config (:issue:`1274`).

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Interpret application/x-json as TextResponse (:issue:`1333`).

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Support link rel attribute with multiple values (:issue:`1201`).

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Fixed scrapy.http.FormRequest.from_response when there is a <base> tag (:issue:`1564`).

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Fixed :setting:`TEMPLATES_DIR` handling (:issue:`1575`).

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Various FormRequest fixes (:issue:`1595`, :issue:`1596`, :issue:`1597`).

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Makes _monkeypatches more robust (:issue:`1634`).

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Fixed bug on XMLItemExporter with non-string fields in items (:issue:`1738`).

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Fixed startproject command in macOS (:issue:`1635`).

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Fixed :class:`~scrapy.exporters.PythonItemExporter` and CSVExporter for non-string item types (:issue:`1737`).

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Various logging related fixes (:issue:`1294`, :issue:`1419`, :issue:`1263`, :issue:`1624`, :issue:`1654`, :issue:`1722`, :issue:`1726` and :issue:`1303`).

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Fixed bug in utils.template.render_templatefile() (:issue:`1212`).

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sitemaps extraction from robots.txt is now case-insensitive (:issue:`1902`).

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HTTPS+CONNECT tunnels could get mixed up when using multiple proxies to same remote host (:issue:`1912`).

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Scrapy 1.0.7 (2017-03-03)

Packaging fix: disallow unsupported Twisted versions in setup.py

Scrapy 1.0.6 (2016-05-04)

FIX: RetryMiddleware is now robust to non-standard HTTP status codes (:issue:`1857`)

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FIX: Filestorage HTTP cache was checking wrong modified time (:issue:`1875`)

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DOC: Support for Sphinx 1.4+ (:issue:`1893`)

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DOC: Consistency in selectors examples (:issue:`1869`)

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Scrapy 1.0.5 (2016-02-04)

FIX: [Backport] Ignore bogus links in LinkExtractors (fixes :issue:`907`, :commit:`108195e`)

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TST: Changed buildbot makefile to use 'pytest' (:commit:`1f3d90a`)

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DOC: Fixed typos in tutorial and media-pipeline (:commit:`808a9ea` and :commit:`803bd87`)

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DOC: Add AjaxCrawlMiddleware to DOWNLOADER_MIDDLEWARES_BASE in settings docs (:commit:`aa94121`)

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Scrapy 1.0.4 (2015-12-30)

Ignoring xlib/tx folder, depending on Twisted version. (:commit:`7dfa979`)

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Run on new travis-ci infra (:commit:`6e42f0b`)

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Spelling fixes (:commit:`823a1cc`)

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escape nodename in xmliter regex (:commit:`da3c155`)

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test xml nodename with dots (:commit:`4418fc3`)

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TST don't use broken Pillow version in tests (:commit:`a55078c`)

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disable log on version command. closes #1426 (:commit:`86fc330`)

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disable log on startproject command (:commit:`db4c9fe`)

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Add PyPI download stats badge (:commit:`df2b944`)

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don't run tests twice on Travis if a PR is made from a scrapy/scrapy branch (:commit:`a83ab41`)

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Add Python 3 porting status badge to the README (:commit:`73ac80d`)

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fixed RFPDupeFilter persistence (:commit:`97d080e`)

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TST a test to show that dupefilter persistence is not working (:commit:`97f2fb3`)

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explicit close file on file:// scheme handler (:commit:`d9b4850`)

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Disable dupefilter in shell (:commit:`c0d0734`)

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DOC: Add captions to toctrees which appear in sidebar (:commit:`aa239ad`)

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DOC Removed pywin32 from install instructions as it's already declared as dependency. (:commit:`10eb400`)

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Added installation notes about using Conda for Windows and other OSes. (:commit:`1c3600a`)

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Fixed minor grammar issues. (:commit:`7f4ddd5`)

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fixed a typo in the documentation. (:commit:`b71f677`)

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Version 1 now exists (:commit:`5456c0e`)

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fix another invalid xpath error (:commit:`0a1366e`)

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fix ValueError: Invalid XPath: //div/[id="not-exists"]/text() on selectors.rst (:commit:`ca8d60f`)

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Typos corrections (:commit:`7067117`)

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fix typos in downloader-middleware.rst and exceptions.rst, middlware -> middleware (:commit:`32f115c`)

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Add note to Ubuntu install section about Debian compatibility (:commit:`23fda69`)

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Replace alternative macOS install workaround with virtualenv (:commit:`98b63ee`)

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Reference Homebrew's homepage for installation instructions (:commit:`1925db1`)

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Add oldest supported tox version to contributing docs (:commit:`5d10d6d`)

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Note in install docs about pip being already included in python>=2.7.9 (:commit:`85c980e`)

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Add non-python dependencies to Ubuntu install section in the docs (:commit:`fbd010d`)

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Add macOS installation section to docs (:commit:`d8f4cba`)

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DOC(ENH): specify path to rtd theme explicitly (:commit:`de73b1a`)

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minor: scrapy.Spider docs grammar (:commit:`1ddcc7b`)

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Make common practices sample code match the comments (:commit:`1b85bcf`)

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nextcall repetitive calls (heartbeats). (:commit:`55f7104`)

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Backport fix compatibility with Twisted 15.4.0 (:commit:`b262411`)

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pin pytest to 2.7.3 (:commit:`a6535c2`)

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Merge pull request #1512 from mgedmin/patch-1 (:commit:`8876111`)

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Merge pull request #1513 from mgedmin/patch-2 (:commit:`5d4daf8`)

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Typo (:commit:`f8d0682`)

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Fix list formatting (:commit:`5f83a93`)

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fix Scrapy squeue tests after recent changes to queuelib (:commit:`3365c01`)

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Merge pull request #1475 from rweindl/patch-1 (:commit:`2d688cd`)

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Update tutorial.rst (:commit:`fbc1f25`)

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Merge pull request #1449 from rhoekman/patch-1 (:commit:`7d6538c`)

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Small grammatical change (:commit:`8752294`)

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Add openssl version to version command (:commit:`13c45ac`)

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Scrapy 1.0.3 (2015-08-11)

add service_identity to Scrapy install_requires (:commit:`cbc2501`)

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Workaround for travis#296 (:commit:`66af9cd`)

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Scrapy 1.0.2 (2015-08-06)

Twisted 15.3.0 does not raises PicklingError serializing lambda functions (:commit:`b04dd7d`)

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Minor method name fix (:commit:`6f85c7f`)

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minor: scrapy.Spider grammar and clarity (:commit:`9c9d2e0`)

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Put a blurb about support channels in CONTRIBUTING (:commit:`c63882b`)

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Fixed typos (:commit:`a9ae7b0`)

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Fix doc reference. (:commit:`7c8a4fe`)

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Scrapy 1.0.1 (2015-07-01)

Unquote request path before passing to FTPClient, it already escape paths (:commit:`cc00ad2`)

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include tests/ to source distribution in MANIFEST.in (:commit:`eca227e`)

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DOC Fix SelectJmes documentation (:commit:`b8567bc`)

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Scrapy 1.0.0 (2015-06-19)

You will find a lot of new features and bugfixes in this major release. Make sure to check our updated :ref:`overview <intro-overview>` to get a glance of some of the changes, along with our brushed :ref:`tutorial <intro-tutorial>`.

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Support for returning dictionaries in spiders

Declaring and returning Scrapy Items is no longer necessary to collect the scraped data from your spider, you can now return explicit dictionaries instead.

Classic version

class MyItem(scrapy.Item):
    url = scrapy.Field()

class MySpider(scrapy.Spider):
    def parse(self, response):
        return MyItem(url=response.url)

New version

class MySpider(scrapy.Spider):
    def parse(self, response):
        return {'url': response.url}

Per-spider settings (GSoC 2014)

Last Google Summer of Code project accomplished an important redesign of the mechanism used for populating settings, introducing explicit priorities to override any given setting. As an extension of that goal, we included a new level of priority for settings that act exclusively for a single spider, allowing them to redefine project settings.

Start using it by defining a :attr:`~scrapy.spiders.Spider.custom_settings` class variable in your spider:

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class MySpider(scrapy.Spider):
    custom_settings = {
        "DOWNLOAD_DELAY": 5.0,
        "RETRY_ENABLED": False,
    }

Read more about settings population: :ref:`topics-settings`

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Python Logging

Scrapy 1.0 has moved away from Twisted logging to support Python built in’s as default logging system. We’re maintaining backward compatibility for most of the old custom interface to call logging functions, but you’ll get warnings to switch to the Python logging API entirely.

Old version

from scrapy import log
log.msg('MESSAGE', log.INFO)

New version

import logging
logging.info('MESSAGE')

Logging with spiders remains the same, but on top of the :meth:`~scrapy.spiders.Spider.log` method you’ll have access to a custom :attr:`~scrapy.spiders.Spider.logger` created for the spider to issue log events:

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class MySpider(scrapy.Spider):
    def parse(self, response):
        self.logger.info('Response received')

Read more in the logging documentation: :ref:`topics-logging`

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Crawler API refactoring (GSoC 2014)

Another milestone for last Google Summer of Code was a refactoring of the internal API, seeking a simpler and easier usage. Check new core interface in: :ref:`topics-api`

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A common situation where you will face these changes is while running Scrapy from scripts. Here’s a quick example of how to run a Spider manually with the new API:

from scrapy.crawler import CrawlerProcess

process = CrawlerProcess({
    'USER_AGENT': 'Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1)'
})
process.crawl(MySpider)
process.start()

Bear in mind this feature is still under development and its API may change until it reaches a stable status.

See more examples for scripts running Scrapy: :ref:`topics-practices`

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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 into top level packages. Backward compatibility was kept among internal relocations, while importing deprecated modules expect warnings indicating their new place.

Full list of relocations

Outsourced packages

Note

These extensions went through some minor changes, e.g. some setting names were changed. Please check the documentation in each new repository to get familiar with the new usage.

Old location	New location
scrapy.commands.deploy	scrapyd-client (See other alternatives here: :ref:`topics-deploy`) System Message: ERROR/3 (`<stdin>`, line 4285); backlink Unknown interpreted text role "ref".
scrapy.contrib.djangoitem	scrapy-djangoitem
scrapy.webservice	scrapy-jsonrpc

scrapy.contrib_exp and scrapy.contrib dissolutions

Old location	New location
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	scrapy.loader
scrapy.contrib.loader.processor	scrapy.loader.processors
scrapy.contrib.pipeline	scrapy.pipelines
scrapy.contrib.spidermiddleware	scrapy.spidermiddlewares
scrapy.contrib.spiders	scrapy.spiders
scrapy.contrib.closespider scrapy.contrib.corestats scrapy.contrib.debug scrapy.contrib.feedexport scrapy.contrib.httpcache scrapy.contrib.logstats scrapy.contrib.memdebug scrapy.contrib.memusage scrapy.contrib.spiderstate scrapy.contrib.statsmailer scrapy.contrib.throttle	scrapy.extensions.*

Plural renames and Modules unification

Old location	New location
scrapy.command	scrapy.commands
scrapy.dupefilter	scrapy.dupefilters
scrapy.linkextractor	scrapy.linkextractors
scrapy.spider	scrapy.spiders
scrapy.squeue	scrapy.squeues
scrapy.statscol	scrapy.statscollectors
scrapy.utils.decorator	scrapy.utils.decorators

Class renames

Old location	New location
scrapy.spidermanager.SpiderManager	scrapy.spiderloader.SpiderLoader

Settings renames

Old location	New location
SPIDER_MANAGER_CLASS	SPIDER_LOADER_CLASS

Changelog

New Features and Enhancements

Python logging (:issue:`1060`, :issue:`1235`, :issue:`1236`, :issue:`1240`, :issue:`1259`, :issue:`1278`, :issue:`1286`)

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FEED_EXPORT_FIELDS option (:issue:`1159`, :issue:`1224`)

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Dns cache size and timeout options (:issue:`1132`)

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support namespace prefix in xmliter_lxml (:issue:`963`)

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Reactor threadpool max size setting (:issue:`1123`)

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Allow spiders to return dicts. (:issue:`1081`)

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Add Response.urljoin() helper (:issue:`1086`)

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look in ~/.config/scrapy.cfg for user config (:issue:`1098`)

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handle TLS SNI (:issue:`1101`)

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Selectorlist extract first (:issue:`624`, :issue:`1145`)

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Added JmesSelect (:issue:`1016`)

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add gzip compression to filesystem http cache backend (:issue:`1020`)

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CSS support in link extractors (:issue:`983`)

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httpcache dont_cache meta #19 #689 (:issue:`821`)

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add signal to be sent when request is dropped by the scheduler (:issue:`961`)

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avoid download large response (:issue:`946`)

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Allow to specify the quotechar in CSVFeedSpider (:issue:`882`)

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Add referer to "Spider error processing" log message (:issue:`795`)

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process robots.txt once (:issue:`896`)

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GSoC Per-spider settings (:issue:`854`)

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Add project name validation (:issue:`817`)

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GSoC API cleanup (:issue:`816`, :issue:`1128`, :issue:`1147`, :issue:`1148`, :issue:`1156`, :issue:`1185`, :issue:`1187`, :issue:`1258`, :issue:`1268`, :issue:`1276`, :issue:`1285`, :issue:`1284`)

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Be more responsive with IO operations (:issue:`1074` and :issue:`1075`)

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Do leveldb compaction for httpcache on closing (:issue:`1297`)

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Deprecations and Removals

Deprecate htmlparser link extractor (:issue:`1205`)

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remove deprecated code from FeedExporter (:issue:`1155`)

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a leftover for.15 compatibility (:issue:`925`)

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drop support for CONCURRENT_REQUESTS_PER_SPIDER (:issue:`895`)

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Drop old engine code (:issue:`911`)

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Deprecate SgmlLinkExtractor (:issue:`777`)

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Relocations

Move exporters/__init__.py to exporters.py (:issue:`1242`)

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Move base classes to their packages (:issue:`1218`, :issue:`1233`)

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Module relocation (:issue:`1181`, :issue:`1210`)

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rename SpiderManager to SpiderLoader (:issue:`1166`)

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Remove djangoitem (:issue:`1177`)

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remove scrapy deploy command (:issue:`1102`)

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dissolve contrib_exp (:issue:`1134`)

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Deleted bin folder from root, fixes #913 (:issue:`914`)

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Remove jsonrpc based webservice (:issue:`859`)

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Move Test cases under project root dir (:issue:`827`, :issue:`841`)

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Fix backward incompatibility for relocated paths in settings (:issue:`1267`)

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Documentation

CrawlerProcess documentation (:issue:`1190`)

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Favoring web scraping over screen scraping in the descriptions (:issue:`1188`)

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Some improvements for Scrapy tutorial (:issue:`1180`)

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Documenting Files Pipeline together with Images Pipeline (:issue:`1150`)

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deployment docs tweaks (:issue:`1164`)

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Added deployment section covering scrapyd-deploy and shub (:issue:`1124`)

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Adding more settings to project template (:issue:`1073`)

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some improvements to overview page (:issue:`1106`)

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Updated link in docs/topics/architecture.rst (:issue:`647`)

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DOC reorder topics (:issue:`1022`)

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updating list of Request.meta special keys (:issue:`1071`)

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DOC document download_timeout (:issue:`898`)

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DOC simplify extension docs (:issue:`893`)

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Leaks docs (:issue:`894`)

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DOC document from_crawler method for item pipelines (:issue:`904`)

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Spider_error doesn't support deferreds (:issue:`1292`)

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Corrections & Sphinx related fixes (:issue:`1220`, :issue:`1219`, :issue:`1196`, :issue:`1172`, :issue:`1171`, :issue:`1169`, :issue:`1160`, :issue:`1154`, :issue:`1127`, :issue:`1112`, :issue:`1105`, :issue:`1041`, :issue:`1082`, :issue:`1033`, :issue:`944`, :issue:`866`, :issue:`864`, :issue:`796`, :issue:`1260`, :issue:`1271`, :issue:`1293`, :issue:`1298`)

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Bugfixes

Item multi inheritance fix (:issue:`353`, :issue:`1228`)

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ItemLoader.load_item: iterate over copy of fields (:issue:`722`)

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Fix Unhandled error in Deferred (RobotsTxtMiddleware) (:issue:`1131`, :issue:`1197`)

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Force to read DOWNLOAD_TIMEOUT as int (:issue:`954`)

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scrapy.utils.misc.load_object should print full traceback (:issue:`902`)

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Fix bug for ".local" host name (:issue:`878`)

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Fix for Enabled extensions, middlewares, pipelines info not printed anymore (:issue:`879`)

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fix dont_merge_cookies bad behaviour when set to false on meta (:issue:`846`)

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Python 3 In Progress Support

disable scrapy.telnet if twisted.conch is not available (:issue:`1161`)

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fix Python 3 syntax errors in ajaxcrawl.py (:issue:`1162`)

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more python3 compatibility changes for urllib (:issue:`1121`)

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updated deprecated cgi.parse_qsl to use six's parse_qsl (:issue:`909`)

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Prevent Python 3 port regressions (:issue:`830`)

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PY3: use MutableMapping for python 3 (:issue:`810`)

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PY3: use six.BytesIO and six.moves.cStringIO (:issue:`803`)

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PY3: fix xmlrpclib and email imports (:issue:`801`)

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PY3 make it possible to run some tests in Python3 (:issue:`776`)

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Tests

remove unnecessary lines from py3-ignores (:issue:`1243`)

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Fix remaining warnings from pytest while collecting tests (:issue:`1206`)

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Add docs build to travis (:issue:`1234`)

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TST don't collect tests from deprecated modules. (:issue:`1165`)

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install service_identity package in tests to prevent warnings (:issue:`1168`)

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Fix deprecated settings API in tests (:issue:`1152`)

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Add test for webclient with POST method and no body given (:issue:`1089`)

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py3-ignores.txt supports comments (:issue:`1044`)

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modernize some of the asserts (:issue:`835`)

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selector.__repr__ test (:issue:`779`)

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Code refactoring

CSVFeedSpider cleanup: use iterate_spider_output (:issue:`1079`)

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remove unnecessary check from scrapy.utils.spider.iter_spider_output (:issue:`1078`)

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Pydispatch pep8 (:issue:`992`)

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Removed unused 'load=False' parameter from walk_modules() (:issue:`871`)

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For consistency, use job_dir helper in SpiderState extension. (:issue:`805`)

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rename "sflo" local variables to less cryptic "log_observer" (:issue:`775`)

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Scrapy 0.24.6 (2015-04-20)

encode invalid xpath with unicode_escape under PY2 (:commit:`07cb3e5`)

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fix IPython shell scope issue and load IPython user config (:commit:`2c8e573`)

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Fix small typo in the docs (:commit:`d694019`)

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Fix small typo (:commit:`f92fa83`)

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Converted sel.xpath() calls to response.xpath() in Extracting the data (:commit:`c2c6d15`)

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Scrapy 0.24.5 (2015-02-25)

Support new _getEndpoint Agent signatures on Twisted 15.0.0 (:commit:`540b9bc`)

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DOC a couple more references are fixed (:commit:`b4c454b`)

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DOC fix a reference (:commit:`e3c1260`)

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t.i.b.ThreadedResolver is now a new-style class (:commit:`9e13f42`)

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S3DownloadHandler: fix auth for requests with quoted paths/query params (:commit:`cdb9a0b`)

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fixed the variable types in mailsender documentation (:commit:`bb3a848`)

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Reset items_scraped instead of item_count (:commit:`edb07a4`)

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Tentative attention message about what document to read for contributions (:commit:`7ee6f7a`)

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mitmproxy 0.10.1 needs netlib 0.10.1 too (:commit:`874fcdd`)

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pin mitmproxy 0.10.1 as >0.11 does not work with tests (:commit:`c6b21f0`)

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Test the parse command locally instead of against an external url (:commit:`c3a6628`)

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Patches Twisted issue while closing the connection pool on HTTPDownloadHandler (:commit:`d0bf957`)

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Updates documentation on dynamic item classes. (:commit:`eeb589a`)

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Merge pull request #943 from Lazar-T/patch-3 (:commit:`5fdab02`)

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typo (:commit:`b0ae199`)

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pywin32 is required by Twisted. closes #937 (:commit:`5cb0cfb`)

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Update install.rst (:commit:`781286b`)

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Merge pull request #928 from Lazar-T/patch-1 (:commit:`b415d04`)

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comma instead of fullstop (:commit:`627b9ba`)

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Merge pull request #885 from jsma/patch-1 (:commit:`de909ad`)

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Update request-response.rst (:commit:`3f3263d`)

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SgmlLinkExtractor - fix for parsing <area> tag with Unicode present (:commit:`49b40f0`)

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Scrapy 0.24.4 (2014-08-09)

pem file is used by mockserver and required by scrapy bench (:commit:`5eddc68`)

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scrapy bench needs scrapy.tests* (:commit:`d6cb999`)

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Scrapy 0.24.3 (2014-08-09)

no need to waste travis-ci time on py3 for 0.24 (:commit:`8e080c1`)

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Update installation docs (:commit:`1d0c096`)

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There is a trove classifier for Scrapy framework! (:commit:`4c701d7`)

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update other places where w3lib version is mentioned (:commit:`d109c13`)

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Update w3lib requirement to 1.8.0 (:commit:`39d2ce5`)

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Use w3lib.html.replace_entities() (remove_entities() is deprecated) (:commit:`180d3ad`)

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set zip_safe=False (:commit:`a51ee8b`)

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do not ship tests package (:commit:`ee3b371`)

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scrapy.bat is not needed anymore (:commit:`c3861cf`)

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Modernize setup.py (:commit:`362e322`)

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headers can not handle non-string values (:commit:`94a5c65`)

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fix ftp test cases (:commit:`a274a7f`)

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The sum up of travis-ci builds are taking like 50min to complete (:commit:`ae1e2cc`)

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Update shell.rst typo (:commit:`e49c96a`)

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removes weird indentation in the shell results (:commit:`1ca489d`)

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improved explanations, clarified blog post as source, added link for XPath string functions in the spec (:commit:`65c8f05`)

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renamed UserTimeoutError and ServerTimeouterror #583 (:commit:`037f6ab`)

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adding some xpath tips to selectors docs (:commit:`2d103e0`)

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fix tests to account for https://github.com/scrapy/w3lib/pull/23 (:commit:`f8d366a`)

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get_func_args maximum recursion fix #728 (:commit:`81344ea`)

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Updated input/output processor example according to #560. (:commit:`f7c4ea8`)

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Fixed Python syntax in tutorial. (:commit:`db59ed9`)

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Add test case for tunneling proxy (:commit:`f090260`)

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Bugfix for leaking Proxy-Authorization header to remote host when using tunneling (:commit:`d8793af`)

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Extract links from XHTML documents with MIME-Type "application/xml" (:commit:`ed1f376`)

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Merge pull request #793 from roysc/patch-1 (:commit:`91a1106`)

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Fix typo in commands.rst (:commit:`743e1e2`)

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better testcase for settings.overrides.setdefault (:commit:`e22daaf`)

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Using CRLF as line marker according to http 1.1 definition (:commit:`5ec430b`)

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Scrapy 0.24.2 (2014-07-08)

Use a mutable mapping to proxy deprecated settings.overrides and settings.defaults attribute (:commit:`e5e8133`)

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there is not support for python3 yet (:commit:`3cd6146`)

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Update python compatible version set to Debian packages (:commit:`fa5d76b`)

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DOC fix formatting in release notes (:commit:`c6a9e20`)

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Scrapy 0.24.1 (2014-06-27)

Fix deprecated CrawlerSettings and increase backward compatibility with .defaults attribute (:commit:`8e3f20a`)

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Scrapy 0.24.0 (2014-06-26)

Enhancements

Improve Scrapy top-level namespace (:issue:`494`, :issue:`684`)

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Add selector shortcuts to responses (:issue:`554`, :issue:`690`)

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Add new lxml based LinkExtractor to replace unmaintained SgmlLinkExtractor (:issue:`559`, :issue:`761`, :issue:`763`)

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Cleanup settings API - part of per-spider settings GSoC project (:issue:`737`)

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Add UTF8 encoding header to templates (:issue:`688`, :issue:`762`)

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Telnet console now binds to 127.0.0.1 by default (:issue:`699`)

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Update Debian/Ubuntu install instructions (:issue:`509`, :issue:`549`)

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Disable smart strings in lxml XPath evaluations (:issue:`535`)

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Restore filesystem based cache as default for http cache middleware (:issue:`541`, :issue:`500`, :issue:`571`)

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Expose current crawler in Scrapy shell (:issue:`557`)

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Improve testsuite comparing CSV and XML exporters (:issue:`570`)

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New offsite/filtered and offsite/domains stats (:issue:`566`)

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Support process_links as generator in CrawlSpider (:issue:`555`)

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Verbose logging and new stats counters for DupeFilter (:issue:`553`)

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Add a mimetype parameter to MailSender.send() (:issue:`602`)

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Generalize file pipeline log messages (:issue:`622`)

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Replace unencodeable codepoints with html entities in SGMLLinkExtractor (:issue:`565`)

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Converted SEP documents to rst format (:issue:`629`, :issue:`630`, :issue:`638`, :issue:`632`, :issue:`636`, :issue:`640`, :issue:`635`, :issue:`634`, :issue:`639`, :issue:`637`, :issue:`631`, :issue:`633`, :issue:`641`, :issue:`642`)

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Tests and docs for clickdata's nr index in FormRequest (:issue:`646`, :issue:`645`)

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Allow to disable a downloader handler just like any other component (:issue:`650`)

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Log when a request is discarded after too many redirections (:issue:`654`)

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Log error responses if they are not handled by spider callbacks (:issue:`612`, :issue:`656`)

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Add content-type check to http compression mw (:issue:`193`, :issue:`660`)

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Run pypy tests using latest pypi from ppa (:issue:`674`)

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Run test suite using pytest instead of trial (:issue:`679`)

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Build docs and check for dead links in tox environment (:issue:`687`)

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Make scrapy.version_info a tuple of integers (:issue:`681`, :issue:`692`)

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Infer exporter's output format from filename extensions (:issue:`546`, :issue:`659`, :issue:`760`)

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Support case-insensitive domains in url_is_from_any_domain() (:issue:`693`)

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Remove pep8 warnings in project and spider templates (:issue:`698`)

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Tests and docs for request_fingerprint function (:issue:`597`)

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Update SEP-19 for GSoC project per-spider settings (:issue:`705`)

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Set exit code to non-zero when contracts fails (:issue:`727`)

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Add a setting to control what class is instantiated as Downloader component (:issue:`738`)

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Pass response in item_dropped signal (:issue:`724`)

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Improve scrapy check contracts command (:issue:`733`, :issue:`752`)

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Document spider.closed() shortcut (:issue:`719`)

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Document request_scheduled signal (:issue:`746`)

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Add a note about reporting security issues (:issue:`697`)

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Add LevelDB http cache storage backend (:issue:`626`, :issue:`500`)

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Sort spider list output of scrapy list command (:issue:`742`)

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Multiple documentation enhancements and fixes (:issue:`575`, :issue:`587`, :issue:`590`, :issue:`596`, :issue:`610`, :issue:`617`, :issue:`618`, :issue:`627`, :issue:`613`, :issue:`643`, :issue:`654`, :issue:`675`, :issue:`663`, :issue:`711`, :issue:`714`)

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Bugfixes

Encode unicode URL value when creating Links in RegexLinkExtractor (:issue:`561`)

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Ignore None values in ItemLoader processors (:issue:`556`)

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Fix link text when there is an inner tag in SGMLLinkExtractor and HtmlParserLinkExtractor (:issue:`485`, :issue:`574`)

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Fix wrong checks on subclassing of deprecated classes (:issue:`581`, :issue:`584`)

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Handle errors caused by inspect.stack() failures (:issue:`582`)

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Fix a reference to unexistent engine attribute (:issue:`593`, :issue:`594`)

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Fix dynamic itemclass example usage of type() (:issue:`603`)

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Use lucasdemarchi/codespell to fix typos (:issue:`628`)

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Fix default value of attrs argument in SgmlLinkExtractor to be tuple (:issue:`661`)

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Fix XXE flaw in sitemap reader (:issue:`676`)

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Fix engine to support filtered start requests (:issue:`707`)

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Fix offsite middleware case on urls with no hostnames (:issue:`745`)

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Testsuite doesn't require PIL anymore (:issue:`585`)

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Scrapy 0.22.2 (released 2014-02-14)

fix a reference to unexistent engine.slots. closes #593 (:commit:`13c099a`)

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downloaderMW doc typo (spiderMW doc copy remnant) (:commit:`8ae11bf`)

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Correct typos (:commit:`1346037`)

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Scrapy 0.22.1 (released 2014-02-08)

localhost666 can resolve under certain circumstances (:commit:`2ec2279`)

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test inspect.stack failure (:commit:`cc3eda3`)

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Handle cases when inspect.stack() fails (:commit:`8cb44f9`)

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Fix wrong checks on subclassing of deprecated classes. closes #581 (:commit:`46d98d6`)

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Docs: 4-space indent for final spider example (:commit:`13846de`)

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Fix HtmlParserLinkExtractor and tests after #485 merge (:commit:`368a946`)

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BaseSgmlLinkExtractor: Fixed the missing space when the link has an inner tag (:commit:`b566388`)

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BaseSgmlLinkExtractor: Added unit test of a link with an inner tag (:commit:`c1cb418`)

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BaseSgmlLinkExtractor: Fixed unknown_endtag() so that it only set current_link=None when the end tag match the opening tag (:commit:`7e4d627`)

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Fix tests for Travis-CI build (:commit:`76c7e20`)

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replace unencodable codepoints with html entities. fixes #562 and #285 (:commit:`5f87b17`)

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RegexLinkExtractor: encode URL unicode value when creating Links (:commit:`d0ee545`)

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Updated the tutorial crawl output with latest output. (:commit:`8da65de`)

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Updated shell docs with the crawler reference and fixed the actual shell output. (:commit:`875b9ab`)

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PEP8 minor edits. (:commit:`f89efaf`)

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Expose current crawler in the Scrapy shell. (:commit:`5349cec`)

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Unused re import and PEP8 minor edits. (:commit:`387f414`)

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Ignore None's values when using the ItemLoader. (:commit:`0632546`)

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DOC Fixed HTTPCACHE_STORAGE typo in the default value which is now Filesystem instead Dbm. (:commit:`cde9a8c`)

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show Ubuntu setup instructions as literal code (:commit:`fb5c9c5`)

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Update Ubuntu installation instructions (:commit:`70fb105`)

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Merge pull request #550 from stray-leone/patch-1 (:commit:`6f70b6a`)

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modify the version of Scrapy Ubuntu package (:commit:`725900d`)

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fix 0.22.0 release date (:commit:`af0219a`)

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fix typos in news.rst and remove (not released yet) header (:commit:`b7f58f4`)

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Scrapy 0.22.0 (released 2014-01-17)

Enhancements

[Backward incompatible] Switched HTTPCacheMiddleware backend to filesystem (:issue:`541`) To restore old backend set HTTPCACHE_STORAGE to scrapy.contrib.httpcache.DbmCacheStorage

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Proxy https:// urls using CONNECT method (:issue:`392`, :issue:`397`)

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Add a middleware to crawl ajax crawleable pages as defined by google (:issue:`343`)

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Rename scrapy.spider.BaseSpider to scrapy.spider.Spider (:issue:`510`, :issue:`519`)

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Selectors register EXSLT namespaces by default (:issue:`472`)

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Unify item loaders similar to selectors renaming (:issue:`461`)

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Make RFPDupeFilter class easily subclassable (:issue:`533`)

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Improve test coverage and forthcoming Python 3 support (:issue:`525`)

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Promote startup info on settings and middleware to INFO level (:issue:`520`)

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Support partials in get_func_args util (:issue:`506`, issue:504)

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Allow running individual tests via tox (:issue:`503`)

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Update extensions ignored by link extractors (:issue:`498`)

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Add middleware methods to get files/images/thumbs paths (:issue:`490`)

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Improve offsite middleware tests (:issue:`478`)

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Add a way to skip default Referer header set by RefererMiddleware (:issue:`475`)

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Do not send x-gzip in default Accept-Encoding header (:issue:`469`)

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Support defining http error handling using settings (:issue:`466`)

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Use modern python idioms wherever you find legacies (:issue:`497`)

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Improve and correct documentation (:issue:`527`, :issue:`524`, :issue:`521`, :issue:`517`, :issue:`512`, :issue:`505`, :issue:`502`, :issue:`489`, :issue:`465`, :issue:`460`, :issue:`425`, :issue:`536`)

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Fixes

Update Selector class imports in CrawlSpider template (:issue:`484`)

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Fix unexistent reference to engine.slots (:issue:`464`)

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Do not try to call body_as_unicode() on a non-TextResponse instance (:issue:`462`)

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Warn when subclassing XPathItemLoader, previously it only warned on instantiation. (:issue:`523`)

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Warn when subclassing XPathSelector, previously it only warned on instantiation. (:issue:`537`)

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Multiple fixes to memory stats (:issue:`531`, :issue:`530`, :issue:`529`)

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Fix overriding url in FormRequest.from_response() (:issue:`507`)

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Fix tests runner under pip 1.5 (:issue:`513`)

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Fix logging error when spider name is unicode (:issue:`479`)

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Scrapy 0.20.2 (released 2013-12-09)

Update CrawlSpider Template with Selector changes (:commit:`6d1457d`)

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fix method name in tutorial. closes GH-480 (:commit:`b4fc359`

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Scrapy 0.20.1 (released 2013-11-28)

include_package_data is required to build wheels from published sources (:commit:`5ba1ad5`)

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process_parallel was leaking the failures on its internal deferreds. closes #458 (:commit:`419a780`)

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Scrapy 0.20.0 (released 2013-11-08)

Enhancements

New Selector's API including CSS selectors (:issue:`395` and :issue:`426`),

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Request/Response url/body attributes are now immutable (modifying them had been deprecated for a long time)
:setting:`ITEM_PIPELINES` is now defined as a dict (instead of a list)

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Sitemap spider can fetch alternate URLs (:issue:`360`)

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Selector.remove_namespaces() now remove namespaces from element's attributes. (:issue:`416`)

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Paved the road for Python 3.3+ (:issue:`435`, :issue:`436`, :issue:`431`, :issue:`452`)

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New item exporter using native python types with nesting support (:issue:`366`)

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Tune HTTP1.1 pool size so it matches concurrency defined by settings (:commit:`b43b5f575`)

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scrapy.mail.MailSender now can connect over TLS or upgrade using STARTTLS (:issue:`327`)

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New FilesPipeline with functionality factored out from ImagesPipeline (:issue:`370`, :issue:`409`)

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Recommend Pillow instead of PIL for image handling (:issue:`317`)

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Added Debian packages for Ubuntu Quantal and Raring (:commit:`86230c0`)

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Mock server (used for tests) can listen for HTTPS requests (:issue:`410`)

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Remove multi spider support from multiple core components (:issue:`422`, :issue:`421`, :issue:`420`, :issue:`419`, :issue:`423`, :issue:`418`)

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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`)

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Pylinted, pep8 and removed old-style exceptions from source (:issue:`430`, :issue:`432`)

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Use importlib for parametric imports (:issue:`445`)

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Handle a regression introduced in Python 2.7.5 that affects XmlItemExporter (:issue:`372`)

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Bugfix crawling shutdown on SIGINT (:issue:`450`)

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Do not submit reset type inputs in FormRequest.from_response (:commit:`b326b87`)

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Do not silence download errors when request errback raises an exception (:commit:`684cfc0`)

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Bugfixes

Fix tests under Django 1.6 (:commit:`b6bed44c`)

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Lot of bugfixes to retry middleware under disconnections using HTTP 1.1 download handler
Fix inconsistencies among Twisted releases (:issue:`406`)

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Fix Scrapy shell bugs (:issue:`418`, :issue:`407`)

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Fix invalid variable name in setup.py (:issue:`429`)

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Fix tutorial references (:issue:`387`)

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Improve request-response docs (:issue:`391`)

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Improve best practices docs (:issue:`399`, :issue:`400`, :issue:`401`, :issue:`402`)

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Improve django integration docs (:issue:`404`)

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Document bindaddress request meta (:commit:`37c24e01d7`)

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Improve Request class documentation (:issue:`226`)

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Other

Dropped Python 2.6 support (:issue:`448`)

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Add :doc:`cssselect <cssselect:index>` python package as install dependency

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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`)

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Thanks

Thanks to everyone who contribute to this release!

List of contributors sorted by number of commits:

69 Daniel Graña <dangra@...>
37 Pablo Hoffman <pablo@...>
13 Mikhail Korobov <kmike84@...>
 9 Alex Cepoi <alex.cepoi@...>
 9 alexanderlukanin13 <alexander.lukanin.13@...>
 8 Rolando Espinoza La fuente <darkrho@...>
 8 Lukasz Biedrycki <lukasz.biedrycki@...>
 6 Nicolas Ramirez <nramirez.uy@...>
 3 Paul Tremberth <paul.tremberth@...>
 2 Martin Olveyra <molveyra@...>
 2 Stefan <misc@...>
 2 Rolando Espinoza <darkrho@...>
 2 Loren Davie <loren@...>
 2 irgmedeiros <irgmedeiros@...>
 1 Stefan Koch <taikano@...>
 1 Stefan <cct@...>
 1 scraperdragon <dragon@...>
 1 Kumara Tharmalingam <ktharmal@...>
 1 Francesco Piccinno <stack.box@...>
 1 Marcos Campal <duendex@...>
 1 Dragon Dave <dragon@...>
 1 Capi Etheriel <barraponto@...>
 1 cacovsky <amarquesferraz@...>
 1 Berend Iwema <berend@...>

Scrapy 0.18.4 (released 2013-10-10)

IPython refuses to update the namespace. fix #396 (:commit:`3d32c4f`)

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Fix AlreadyCalledError replacing a request in shell command. closes #407 (:commit:`b1d8919`)

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Fix start_requests laziness and early hangs (:commit:`89faf52`)

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Scrapy 0.18.3 (released 2013-10-03)

fix regression on lazy evaluation of start requests (:commit:`12693a5`)

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forms: do not submit reset inputs (:commit:`e429f63`)

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increase unittest timeouts to decrease travis false positive failures (:commit:`912202e`)

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backport master fixes to json exporter (:commit:`cfc2d46`)

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Fix permission and set umask before generating sdist tarball (:commit:`06149e0`)

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Scrapy 0.18.2 (released 2013-09-03)

Backport scrapy check command fixes and backward compatible multi crawler process(:issue:`339`)

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Scrapy 0.18.1 (released 2013-08-27)

remove extra import added by cherry picked changes (:commit:`d20304e`)

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fix crawling tests under twisted pre 11.0.0 (:commit:`1994f38`)

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py26 can not format zero length fields {} (:commit:`abf756f`)

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test PotentiaDataLoss errors on unbound responses (:commit:`b15470d`)

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Treat responses without content-length or Transfer-Encoding as good responses (:commit:`c4bf324`)

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do no include ResponseFailed if http11 handler is not enabled (:commit:`6cbe684`)

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New HTTP client wraps connection lost in ResponseFailed exception. fix #373 (:commit:`1a20bba`)

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limit travis-ci build matrix (:commit:`3b01bb8`)

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Merge pull request #375 from peterarenot/patch-1 (:commit:`fa766d7`)

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Fixed so it refers to the correct folder (:commit:`3283809`)

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added Quantal & Raring to support Ubuntu releases (:commit:`1411923`)

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fix retry middleware which didn't retry certain connection errors after the upgrade to http1 client, closes GH-373 (:commit:`bb35ed0`)

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fix XmlItemExporter in Python 2.7.4 and 2.7.5 (:commit:`de3e451`)

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minor updates to 0.18 release notes (:commit:`c45e5f1`)

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fix contributors list format (:commit:`0b60031`)

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Scrapy 0.18.0 (released 2013-08-09)

Lot of improvements to testsuite run using Tox, including a way to test on pypi
Handle GET parameters for AJAX crawleable urls (:commit:`3fe2a32`)

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Use lxml recover option to parse sitemaps (:issue:`347`)

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Bugfix cookie merging by hostname and not by netloc (:issue:`352`)

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Support disabling HttpCompressionMiddleware using a flag setting (:issue:`359`)

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Support xml namespaces using iternodes parser in XMLFeedSpider (:issue:`12`)

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Support dont_cache request meta flag (:issue:`19`)

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Bugfix scrapy.utils.gz.gunzip broken by changes in python 2.7.4 (:commit:`4dc76e`)

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Bugfix url encoding on SgmlLinkExtractor (:issue:`24`)

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Bugfix TakeFirst processor shouldn't discard zero (0) value (:issue:`59`)

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Support nested items in xml exporter (:issue:`66`)

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Improve cookies handling performance (:issue:`77`)

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Log dupe filtered requests once (:issue:`105`)

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Split redirection middleware into status and meta based middlewares (:issue:`78`)

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Use HTTP1.1 as default downloader handler (:issue:`109` and :issue:`318`)

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Support xpath form selection on FormRequest.from_response (:issue:`185`)

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Bugfix unicode decoding error on SgmlLinkExtractor (:issue:`199`)

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Bugfix signal dispatching on pypi interpreter (:issue:`205`)

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Improve request delay and concurrency handling (:issue:`206`)

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Add RFC2616 cache policy to HttpCacheMiddleware (:issue:`212`)

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Allow customization of messages logged by engine (:issue:`214`)

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Multiples improvements to DjangoItem (:issue:`217`, :issue:`218`, :issue:`221`)

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Extend Scrapy commands using setuptools entry points (:issue:`260`)

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Allow spider allowed_domains value to be set/tuple (:issue:`261`)

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Support settings.getdict (:issue:`269`)

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Simplify internal scrapy.core.scraper slot handling (:issue:`271`)

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Added Item.copy (:issue:`290`)

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Collect idle downloader slots (:issue:`297`)

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Add ftp:// scheme downloader handler (:issue:`329`)

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Added downloader benchmark webserver and spider tools :ref:`benchmarking`

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Moved persistent (on disk) queues to a separate project (queuelib) which Scrapy now depends on
Add Scrapy commands using external libraries (:issue:`260`)

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Added --pdb option to scrapy command line tool
Added :meth:`XPathSelector.remove_namespaces <scrapy.selector.Selector.remove_namespaces>` which allows to remove all namespaces from XML documents for convenience (to work with namespace-less XPaths). Documented in :ref:`topics-selectors`.

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Several improvements to spider contracts
New default middleware named MetaRefreshMiddldeware that handles meta-refresh html tag redirections,
MetaRefreshMiddldeware and RedirectMiddleware have different priorities to address #62
added from_crawler method to spiders
added system tests with mock server
more improvements to macOS compatibility (thanks Alex Cepoi)
several more cleanups to singletons and multi-spider support (thanks Nicolas Ramirez)
support custom download slots
added --spider option to "shell" command.
log overridden settings when Scrapy starts

Thanks to everyone who contribute to this release. Here is a list of contributors sorted by number of commits:

130 Pablo Hoffman <pablo@...>
 97 Daniel Graña <dangra@...>
 20 Nicolás Ramírez <nramirez.uy@...>
 13 Mikhail Korobov <kmike84@...>
 12 Pedro Faustino <pedrobandim@...>
 11 Steven Almeroth <sroth77@...>
  5 Rolando Espinoza La fuente <darkrho@...>
  4 Michal Danilak <mimino.coder@...>
  4 Alex Cepoi <alex.cepoi@...>
  4 Alexandr N Zamaraev (aka tonal) <tonal@...>
  3 paul <paul.tremberth@...>
  3 Martin Olveyra <molveyra@...>
  3 Jordi Llonch <llonchj@...>
  3 arijitchakraborty <myself.arijit@...>
  2 Shane Evans <shane.evans@...>
  2 joehillen <joehillen@...>
  2 Hart <HartSimha@...>
  2 Dan <ellisd23@...>
  1 Zuhao Wan <wanzuhao@...>
  1 whodatninja <blake@...>
  1 vkrest <v.krestiannykov@...>
  1 tpeng <pengtaoo@...>
  1 Tom Mortimer-Jones <tom@...>
  1 Rocio Aramberri <roschegel@...>
  1 Pedro <pedro@...>
  1 notsobad <wangxiaohugg@...>
  1 Natan L <kuyanatan.nlao@...>
  1 Mark Grey <mark.grey@...>
  1 Luan <luanpab@...>
  1 Libor Nenadál <libor.nenadal@...>
  1 Juan M Uys <opyate@...>
  1 Jonas Brunsgaard <jonas.brunsgaard@...>
  1 Ilya Baryshev <baryshev@...>
  1 Hasnain Lakhani <m.hasnain.lakhani@...>
  1 Emanuel Schorsch <emschorsch@...>
  1 Chris Tilden <chris.tilden@...>
  1 Capi Etheriel <barraponto@...>
  1 cacovsky <amarquesferraz@...>
  1 Berend Iwema <berend@...>

Scrapy 0.16.5 (released 2013-05-30)

obey request method when Scrapy deploy is redirected to a new endpoint (:commit:`8c4fcee`)

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fix inaccurate downloader middleware documentation. refs #280 (:commit:`40667cb`)

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doc: remove links to diveintopython.org, which is no longer available. closes #246 (:commit:`bd58bfa`)

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Find form nodes in invalid html5 documents (:commit:`e3d6945`)

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Fix typo labeling attrs type bool instead of list (:commit:`a274276`)

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Scrapy 0.16.4 (released 2013-01-23)

fixes spelling errors in documentation (:commit:`6d2b3aa`)

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add doc about disabling an extension. refs #132 (:commit:`c90de33`)

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Fixed error message formatting. log.err() doesn't support cool formatting and when error occurred, the message was: "ERROR: Error processing %(item)s" (:commit:`c16150c`)

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lint and improve images pipeline error logging (:commit:`56b45fc`)

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fixed doc typos (:commit:`243be84`)

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add documentation topics: Broad Crawls & Common Practices (:commit:`1fbb715`)

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fix bug in Scrapy parse command when spider is not specified explicitly. closes #209 (:commit:`c72e682`)

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Update docs/topics/commands.rst (:commit:`28eac7a`)

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Scrapy 0.16.3 (released 2012-12-07)

Remove concurrency limitation when using download delays and still ensure inter-request delays are enforced (:commit:`487b9b5`)

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add error details when image pipeline fails (:commit:`8232569`)

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improve macOS compatibility (:commit:`8dcf8aa`)

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setup.py: use README.rst to populate long_description (:commit:`7b5310d`)

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doc: removed obsolete references to ClientForm (:commit:`80f9bb6`)

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correct docs for default storage backend (:commit:`2aa491b`)

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doc: removed broken proxyhub link from FAQ (:commit:`bdf61c4`)

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Fixed docs typo in SpiderOpenCloseLogging example (:commit:`7184094`)

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Scrapy 0.16.2 (released 2012-11-09)

Scrapy contracts: python2.6 compat (:commit:`a4a9199`)

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Scrapy contracts verbose option (:commit:`ec41673`)

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proper unittest-like output for Scrapy contracts (:commit:`86635e4`)

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added open_in_browser to debugging doc (:commit:`c9b690d`)

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removed reference to global Scrapy stats from settings doc (:commit:`dd55067`)

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Fix SpiderState bug in Windows platforms (:commit:`58998f4`)

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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`)

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better backward compatibility for scrapy.conf.settings (:commit:`3403089`)

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extended documentation on how to access crawler stats from extensions (:commit:`c4da0b5`)

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removed .hgtags (no longer needed now that Scrapy uses git) (:commit:`d52c188`)

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fix dashes under rst headers (:commit:`fa4f7f9`)

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set release date for 0.16.0 in news (:commit:`e292246`)

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Scrapy 0.16.0 (released 2012-10-18)

Scrapy changes:

added :ref:`topics-contracts`, a mechanism for testing spiders in a formal/reproducible way

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added options -o and -t to the :command:`runspider` command

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documented :doc:`topics/autothrottle` and added to extensions installed by default. You still need to enable it with :setting:`AUTOTHROTTLE_ENABLED`

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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.spidermiddlewares.SpiderMiddleware.process_start_requests` method to spider middlewares

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dropped Signals singleton. Signals should now be accessed 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`

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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`)

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StackTraceDump extension: also dump trackref live references (:commit:`fe2ce93`)

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nested items now fully supported in JSON and JSONLines exporters
added :reqmeta:`cookiejar` Request meta key to support multiple cookie sessions per spider

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decoupled encoding detection code to w3lib.encoding, and ported Scrapy code to use that module
dropped support for Python 2.5. See https://blog.scrapinghub.com/2012/02/27/scrapy-0-15-dropping-support-for-python-2-5/
dropped support for Twisted 2.5
added :setting:`REFERER_ENABLED` setting, to control referer middleware

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changed default user agent to: Scrapy/VERSION (+http://scrapy.org)
removed (undocumented) HTMLImageLinkExtractor class from scrapy.contrib.linkextractors.image
removed per-spider settings (to be replaced by instantiating multiple crawler objects)
USER_AGENT spider attribute will no longer work, use user_agent attribute instead
DOWNLOAD_TIMEOUT spider attribute will no longer work, use download_timeout attribute instead
removed ENCODING_ALIASES setting, as encoding auto-detection has been moved to the w3lib library
promoted :ref:`topics-djangoitem` to main contrib

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LogFormatter method now return dicts(instead of strings) to support lazy formatting (:issue:`164`, :commit:`dcef7b0`)

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downloader handlers (:setting:`DOWNLOAD_HANDLERS` setting) now receive settings as the first argument of the __init__ method

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replaced memory usage acounting with (more portable) resource module, removed scrapy.utils.memory module
removed signal: scrapy.mail.mail_sent
removed TRACK_REFS setting, now :ref:`trackrefs <topics-leaks-trackrefs>` is always enabled

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DBM is now the default storage backend for HTTP cache middleware
number of log messages (per level) are now tracked through Scrapy stats (stat name: log_count/LEVEL)
number received responses are now tracked through Scrapy stats (stat name: response_received_count)
removed scrapy.log.started attribute

Scrapy 0.14.4

added precise to supported Ubuntu distros (:commit:`b7e46df`)

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fixed bug in json-rpc webservice reported in https://groups.google.com/forum/#!topic/scrapy-users/qgVBmFybNAQ/discussion. also removed no longer supported 'run' command from extras/scrapy-ws.py (:commit:`340fbdb`)

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meta tag attributes for content-type http equiv can be in any order. #123 (:commit:`0cb68af`)

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replace "import Image" by more standard "from PIL import Image". closes #88 (:commit:`4d17048`)

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return trial status as bin/runtests.sh exit value. #118 (:commit:`b7b2e7f`)

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Scrapy 0.14.3

forgot to include pydispatch license. #118 (:commit:`fd85f9c`)

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include egg files used by testsuite in source distribution. #118 (:commit:`c897793`)

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update docstring in project template to avoid confusion with genspider command, which may be considered as an advanced feature. refs #107 (:commit:`2548dcc`)

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added note to docs/topics/firebug.rst about google directory being shut down (:commit:`668e352`)

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don't discard slot when empty, just save in another dict in order to recycle if needed again. (:commit:`8e9f607`)

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do not fail handling unicode xpaths in libxml2 backed selectors (:commit:`b830e95`)

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fixed minor mistake in Request objects documentation (:commit:`bf3c9ee`)

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fixed minor defect in link extractors documentation (:commit:`ba14f38`)

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removed some obsolete remaining code related to sqlite support in Scrapy (:commit:`0665175`)

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Scrapy 0.14.2

move buffer pointing to start of file before computing checksum. refs #92 (:commit:`6a5bef2`)

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Compute image checksum before persisting images. closes #92 (:commit:`9817df1`)

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remove leaking references in cached failures (:commit:`673a120`)

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fixed bug in MemoryUsage extension: get_engine_status() takes exactly 1 argument (0 given) (:commit:`11133e9`)

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fixed struct.error on http compression middleware. closes #87 (:commit:`1423140`)

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ajax crawling wasn't expanding for unicode urls (:commit:`0de3fb4`)

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Catch start_requests iterator errors. refs #83 (:commit:`454a21d`)

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Speed-up libxml2 XPathSelector (:commit:`2fbd662`)

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updated versioning doc according to recent changes (:commit:`0a070f5`)

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scrapyd: fixed documentation link (:commit:`2b4e4c3`)

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extras/makedeb.py: no longer obtaining version from git (:commit:`caffe0e`)

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Scrapy 0.14.1

extras/makedeb.py: no longer obtaining version from git (:commit:`caffe0e`)

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bumped version to 0.14.1 (:commit:`6cb9e1c`)

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fixed reference to tutorial directory (:commit:`4b86bd6`)

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doc: removed duplicated callback argument from Request.replace() (:commit:`1aeccdd`)

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fixed formatting of scrapyd doc (:commit:`8bf19e6`)

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Dump stacks for all running threads and fix engine status dumped by StackTraceDump extension (:commit:`14a8e6e`)

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added comment about why we disable ssl on boto images upload (:commit:`5223575`)

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SSL handshaking hangs when doing too many parallel connections to S3 (:commit:`63d583d`)

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change tutorial to follow changes on dmoz site (:commit:`bcb3198`)

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Avoid _disconnectedDeferred AttributeError exception in Twisted>=11.1.0 (:commit:`98f3f87`)

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allow spider to set autothrottle max concurrency (:commit:`175a4b5`)

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Scrapy 0.14

New features and settings

Support for AJAX crawleable urls
New persistent scheduler that stores requests on disk, allowing to suspend and resume crawls (:rev:`2737`)

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added -o option to scrapy crawl, a shortcut for dumping scraped items into a file (or standard output using -)
Added support for passing custom settings to Scrapyd schedule.json api (:rev:`2779`, :rev:`2783`)

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New ChunkedTransferMiddleware (enabled by default) to support chunked transfer encoding (:rev:`2769`)

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Add boto 2.0 support for S3 downloader handler (:rev:`2763`)

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Added marshal to formats supported by feed exports (:rev:`2744`)

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In request errbacks, offending requests are now received in failure.request attribute (:rev:`2738`)

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Big downloader refactoring to support per domain/ip concurrency limits (:rev:`2732`)
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- CONCURRENT_REQUESTS_PER_SPIDER setting has been deprecated and replaced by:
  
  :setting:`CONCURRENT_REQUESTS`, :setting:`CONCURRENT_REQUESTS_PER_DOMAIN`, :setting:`CONCURRENT_REQUESTS_PER_IP`
  
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- check the documentation for more details
Added builtin caching DNS resolver (:rev:`2728`)

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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`)

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Moved spider queues to scrapyd: scrapy.spiderqueue -> scrapyd.spiderqueue (:rev:`2708`)

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Moved sqlite utils to scrapyd: scrapy.utils.sqlite -> scrapyd.sqlite (:rev:`2781`)

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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`)

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Added :setting:`REDIRECT_ENABLED` setting to quickly enable/disable the redirect middleware (:rev:`2697`)

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Added :setting:`RETRY_ENABLED` setting to quickly enable/disable the retry middleware (:rev:`2694`)

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Added CloseSpider exception to manually close spiders (:rev:`2691`)

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Improved encoding detection by adding support for HTML5 meta charset declaration (:rev:`2690`)

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Refactored close spider behavior to wait for all downloads to finish and be processed by spiders, before closing the spider (:rev:`2688`)

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Added SitemapSpider (see documentation in Spiders page) (:rev:`2658`)

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Added LogStats extension for periodically logging basic stats (like crawled pages and scraped items) (:rev:`2657`)

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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.

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Simplified !MemoryDebugger extension to use stats for dumping memory debugging info (:rev:`2639`)

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Added new command to edit spiders: scrapy edit (:rev:`2636`) and -e flag to genspider command that uses it (:rev:`2653`)

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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.

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Added :signal:`spider_error` signal (:rev:`2628`)

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Added :setting:`COOKIES_ENABLED` setting (:rev:`2625`)

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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.

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Added support for dynamically adjusting download delay and maximum concurrent requests (:rev:`2599`)

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Added new DBM HTTP cache storage backend (:rev:`2576`)

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Added listjobs.json API to Scrapyd (:rev:`2571`)

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CsvItemExporter: added join_multivalued parameter (:rev:`2578`)

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Added namespace support to xmliter_lxml (:rev:`2552`)

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Improved cookies middleware by making COOKIES_DEBUG nicer and documenting it (:rev:`2579`)

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Several improvements to Scrapyd and Link extractors

Code rearranged and removed

Merged item passed and item scraped concepts, as they have often proved confusing in the past. This means: (:rev:`2630`)
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- original item_scraped signal was removed
- original item_passed signal was renamed to item_scraped
- old log lines Scraped Item... were removed
- old log lines Passed Item... were renamed to Scraped Item... lines and downgraded to DEBUG level
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`)
  
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- scrapely (was scrapy.contrib.ibl, done in :rev:`2586`)
  
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Removed unused function: scrapy.utils.request.request_info() (:rev:`2577`)

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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`)

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Removed experimental crawlspider v2 (:rev:`2632`)

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Removed scheduler middleware to simplify architecture. Duplicates filter is now done in the scheduler itself, using the same dupe filtering class as before (DUPEFILTER_CLASS setting) (:rev:`2640`)

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Removed support for passing urls to scrapy crawl command (use scrapy parse instead) (:rev:`2704`)

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Removed deprecated Execution Queue (:rev:`2704`)

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Removed (undocumented) spider context extension (from scrapy.contrib.spidercontext) (:rev:`2780`)

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removed CONCURRENT_SPIDERS setting (use scrapyd maxproc instead) (:rev:`2789`)

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Renamed attributes of core components: downloader.sites -> downloader.slots, scraper.sites -> scraper.slots (:rev:`2717`, :rev:`2718`)

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Renamed setting CLOSESPIDER_ITEMPASSED to :setting:`CLOSESPIDER_ITEMCOUNT` (:rev:`2655`). Backward compatibility kept.

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Scrapy 0.12

The numbers like #NNN reference tickets in the old issue tracker (Trac) which is no longer available.

New features and improvements

Passed item is now sent in the item argument of the :signal:`item_passed <item_scraped>` (#273)

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Added verbose option to scrapy version command, useful for bug reports (#298)
HTTP cache now stored by default in the project data dir (#279)
Added project data storage directory (#276, #277)
Documented file structure of Scrapy projects (see command-line tool doc)
New lxml backend for XPath selectors (#147)
Per-spider settings (#245)
Support exit codes to signal errors in Scrapy commands (#248)
Added -c argument to scrapy shell command
Made libxml2 optional (#260)
New deploy command (#261)
Added :setting:`CLOSESPIDER_PAGECOUNT` setting (#253)

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Added :setting:`CLOSESPIDER_ERRORCOUNT` setting (#254)

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Scrapyd changes

Scrapyd now uses one process per spider
It stores one log file per spider run, and rotate them keeping the latest 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

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".

Deprecated/obsoleted functionality

Deprecated runserver command in favor of server command which starts a Scrapyd server. See also: Scrapyd changes
Deprecated queue command in favor of using Scrapyd schedule.json API. See also: Scrapyd changes
Removed the !LxmlItemLoader (experimental contrib which never graduated to main contrib)

Scrapy 0.10

The numbers like #NNN reference tickets in the old issue tracker (Trac) which is no longer available.

New features and improvements

New Scrapy service called scrapyd for deploying Scrapy crawlers in production (#218) (documentation available)
Simplified Images pipeline usage which doesn't require subclassing your own images pipeline now (#217)
Scrapy shell now shows the Scrapy log by default (#206)
Refactored execution queue in a common base code and pluggable backends called "spider queues" (#220)
New persistent spider queue (based on SQLite) (#198), available by default, which allows to start Scrapy in server mode and then schedule spiders to run.
Added documentation for Scrapy command-line tool and all its available sub-commands. (documentation available)
Feed exporters with pluggable backends (#197) (documentation available)
Deferred signals (#193)
Added two new methods to item pipeline open_spider(), close_spider() with deferred support (#195)
Support for overriding default request headers per spider (#181)
Replaced default Spider Manager with one with similar functionality but not depending on Twisted Plugins (#186)
Split 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)

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
Added bash completion to command-line tool (#210)
Renamed command start to runserver (#209)

API changes

url and body attributes of Request objects are now read-only (#230)
Request.copy() and Request.replace() now also copies their callback and errback attributes (#231)
Removed UrlFilterMiddleware from scrapy.contrib (already disabled by default)
Offsite middleware doesn't filter out any request coming from a spider that doesn't have a allowed_domains attribute (#225)
Removed Spider Manager load() method. Now spiders are loaded in the __init__ method itself.
Changes to Scrapy Manager (now called "Crawler"):
- scrapy.core.manager.ScrapyManager class renamed to scrapy.crawler.Crawler
- scrapy.core.manager.scrapymanager singleton moved to scrapy.project.crawler
Moved module: scrapy.contrib.spidermanager to scrapy.spidermanager
Spider Manager singleton moved from scrapy.spider.spiders to the spiders` attribute of ``scrapy.project.crawler singleton.
moved Stats Collector classes: (#204)
- scrapy.stats.collector.StatsCollector to scrapy.statscol.StatsCollector
- 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)
- backward compatibility kept (with deprecation warning)
moved scrapy.core.signals module to scrapy.signals
- backward compatibility kept (with deprecation warning)
moved scrapy.core.exceptions module to scrapy.exceptions
- 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
dropped scrapy.log.log_level attribute
Added from_settings() class methods to Spider Manager, and Item Pipeline Manager

Changes to settings

Added HTTPCACHE_IGNORE_SCHEMES setting to ignore certain schemes on !HttpCacheMiddleware (#225)
Added SPIDER_QUEUE_CLASS setting which defines the spider queue to use (#220)
Added KEEP_ALIVE setting (#220)
Removed SERVICE_QUEUE setting (#220)
Removed COMMANDS_SETTINGS_MODULE setting (#201)
Renamed REQUEST_HANDLERS to DOWNLOAD_HANDLERS and make download handlers classes (instead of functions)

Scrapy 0.9

The numbers like #NNN reference tickets in the old issue tracker (Trac) which is no longer available.

New features and improvements

Added SMTP-AUTH support to scrapy.mail
New settings added: MAIL_USER, MAIL_PASS (:rev:`2065` | #149)

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Added new scrapy-ctl view command - To view URL in the browser, as seen by Scrapy (:rev:`2039`)

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Added web service for controlling Scrapy process (this also deprecates the web console. (:rev:`2053` | #167)

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Support for running Scrapy as a service, for production systems (:rev:`1988`, :rev:`2054`, :rev:`2055`, :rev:`2056`, :rev:`2057` | #168)

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Added wrapper induction library (documentation only available in source code for now). (:rev:`2011`)

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Simplified and improved response encoding support (:rev:`1961`, :rev:`1969`)

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Added LOG_ENCODING setting (:rev:`1956`, documentation available)

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Added RANDOMIZE_DOWNLOAD_DELAY setting (enabled by default) (:rev:`1923`, doc available)

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MailSender is no longer IO-blocking (:rev:`1955` | #146)

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Linkextractors and new Crawlspider now handle relative base tag urls (:rev:`1960` | #148)

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Several improvements to Item Loaders and processors (:rev:`2022`, :rev:`2023`, :rev:`2024`, :rev:`2025`, :rev:`2026`, :rev:`2027`, :rev:`2028`, :rev:`2029`, :rev:`2030`)

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Added support for adding variables to telnet console (:rev:`2047` | #165)

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Support for requests without callbacks (:rev:`2050` | #166)

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API changes

Change Spider.domain_name to Spider.name (SEP-012, :rev:`1975`)

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Response.encoding is now the detected encoding (:rev:`1961`)

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HttpErrorMiddleware now returns None or raises an exception (:rev:`2006` | #157)

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scrapy.command modules relocation (:rev:`2035`, :rev:`2036`, :rev:`2037`)

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Added ExecutionQueue for feeding spiders to scrape (:rev:`2034`)

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Removed ExecutionEngine singleton (:rev:`2039`)

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Ported S3ImagesStore (images pipeline) to use boto and threads (:rev:`2033`)

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Moved module: scrapy.management.telnet to scrapy.telnet (:rev:`2047`)

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Changes to default settings

Changed default SCHEDULER_ORDER to DFO (:rev:`1939`)

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Scrapy 0.8

The numbers like #NNN reference tickets in the old issue tracker (Trac) which is no longer available.

New features

Added DEFAULT_RESPONSE_ENCODING setting (:rev:`1809`)

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Added dont_click argument to FormRequest.from_response() method (:rev:`1813`, :rev:`1816`)

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Added clickdata argument to FormRequest.from_response() method (:rev:`1802`, :rev:`1803`)

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Added support for HTTP proxies (HttpProxyMiddleware) (:rev:`1781`, :rev:`1785`)

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Offsite spider middleware now logs messages when filtering out requests (:rev:`1841`)

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Backward-incompatible changes

Changed scrapy.utils.response.get_meta_refresh() signature (:rev:`1804`)

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Removed deprecated scrapy.item.ScrapedItem class - use scrapy.item.Item instead (:rev:`1838`)

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Removed deprecated scrapy.xpath module - use scrapy.selector instead. (:rev:`1836`)

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Removed deprecated core.signals.domain_open signal - use core.signals.domain_opened instead (:rev:`1822`)

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log.msg() now receives a spider argument (:rev:`1822`)
System Message: ERROR/3 (<stdin>, line 5391); backlink

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- Old domain argument has been deprecated and will be removed in 0.9. For spiders, you should always use the spider argument and pass spider references. If you really want to pass a string, use the component argument instead.
Changed core signals domain_opened, domain_closed, domain_idle
Changed Item pipeline to use spiders instead of domains
- The domain argument of process_item() item pipeline method was changed to spider, the new signature is: process_item(spider, item) (:rev:`1827` | #105)
  
  System Message: ERROR/3 (<stdin>, line 5395); backlink
  
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- To quickly port your code (to work with Scrapy 0.8) just use spider.domain_name where you previously used domain.
Changed Stats API to use spiders instead of domains (:rev:`1849` | #113)
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- StatsCollector was changed to receive spider references (instead of domains) in its methods (set_value, inc_value, etc).
- added StatsCollector.iter_spider_stats() method
- removed StatsCollector.list_domains() method
- Also, Stats signals were renamed and now pass around spider references (instead of domains). Here's a summary of the changes:
- To quickly port your code (to work with Scrapy 0.8) just use spider.domain_name where you previously used domain. spider_stats contains exactly the same data as domain_stats.
CloseDomain extension moved to scrapy.contrib.closespider.CloseSpider (:rev:`1833`)
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- Its settings were also renamed:
  
  CLOSEDOMAIN_TIMEOUT to CLOSESPIDER_TIMEOUT
  
  CLOSEDOMAIN_ITEMCOUNT to CLOSESPIDER_ITEMCOUNT
Removed deprecated SCRAPYSETTINGS_MODULE environment variable - use SCRAPY_SETTINGS_MODULE instead (:rev:`1840`)

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Renamed setting: REQUESTS_PER_DOMAIN to CONCURRENT_REQUESTS_PER_SPIDER (:rev:`1830`, :rev:`1844`)

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Renamed setting: CONCURRENT_DOMAINS to CONCURRENT_SPIDERS (:rev:`1830`)

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Refactored HTTP Cache middleware
HTTP Cache middleware has been heavilty refactored, retaining the same functionality except for the domain sectorization which was removed. (:rev:`1843` )

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Renamed exception: DontCloseDomain to DontCloseSpider (:rev:`1859` | #120)

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Renamed extension: DelayedCloseDomain to SpiderCloseDelay (:rev:`1861` | #121)

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Removed obsolete scrapy.utils.markup.remove_escape_chars function - use scrapy.utils.markup.replace_escape_chars instead (:rev:`1865`)

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Scrapy 0.7

First release of Scrapy.

</html>

231 KiB Raw Blame History Unescape Escape

Release notes

Scrapy 2.7.1 (2022-11-02)

New features

Bug fixes

Documentation

Quality assurance

Scrapy 2.7.0 (2022-10-17)

Modified requirements

Deprecations

New features

Bug fixes

Documentation

Quality assurance

Scrapy 2.6.3 (2022-09-27)

Scrapy 2.6.2 (2022-07-25)

Scrapy 2.6.1 (2022-03-01)

Scrapy 2.6.0 (2022-03-01)

Security bug fixes

Modified requirements

Backward-incompatible changes

Deprecation removals

Deprecations

New features

Bug fixes

Documentation

Quality Assurance

Scrapy 2.5.1 (2021-10-05)

Scrapy 2.5.0 (2021-04-06)

Deprecation removals

Deprecations

New features

Bug fixes

Documentation

Quality Assurance

Scrapy 2.4.1 (2020-11-17)

Scrapy 2.4.0 (2020-10-11)

Modified requirements

Backward-incompatible changes

Deprecation removals

Deprecations

New features

Bug fixes

Documentation

Quality assurance

Scrapy 2.3.0 (2020-08-04)

Deprecation removals

Deprecations

New features

Bug fixes

Documentation

Quality assurance

Scrapy 2.2.1 (2020-07-17)

Scrapy 2.2.0 (2020-06-24)

Backward-incompatible changes

Deprecations

New features

Bug fixes

Documentation

Quality assurance

Scrapy 2.1.0 (2020-04-24)

Backward-incompatible changes

Deprecation removals

Deprecations

New features

Bug fixes

Documentation

Quality assurance

Scrapy 2.0.1 (2020-03-18)

Scrapy 2.0.0 (2020-03-03)

Backward-incompatible changes

Deprecation removals

Deprecations

New features

Bug fixes

Documentation

Quality assurance

Changes to scheduler queue classes

Scrapy 1.8.3 (2022-07-25)

Scrapy 1.8.2 (2022-03-01)

231 KiB

Raw Blame History

`scrapy.contracts` improvements