mirror of https://github.com/scrapy/scrapy.git
60 lines
2.0 KiB
Python
60 lines
2.0 KiB
Python
from __future__ import print_function
|
|
from w3lib.url import is_url
|
|
|
|
from scrapy.command import ScrapyCommand
|
|
from scrapy.http import Request
|
|
from scrapy.spider import Spider
|
|
from scrapy.exceptions import UsageError
|
|
from scrapy.utils.spider import create_spider_for_request
|
|
|
|
class Command(ScrapyCommand):
|
|
|
|
requires_project = False
|
|
|
|
def syntax(self):
|
|
return "[options] <url>"
|
|
|
|
def short_desc(self):
|
|
return "Fetch a URL using the Scrapy downloader"
|
|
|
|
def long_desc(self):
|
|
return "Fetch a URL using the Scrapy downloader and print its content " \
|
|
"to stdout. You may want to use --nolog to disable logging"
|
|
|
|
def add_options(self, parser):
|
|
ScrapyCommand.add_options(self, parser)
|
|
parser.add_option("--spider", dest="spider",
|
|
help="use this spider")
|
|
parser.add_option("--headers", dest="headers", action="store_true", \
|
|
help="print response HTTP headers instead of body")
|
|
|
|
def _print_headers(self, headers, prefix):
|
|
for key, values in headers.items():
|
|
for value in values:
|
|
print('%s %s: %s' % (prefix, key, value))
|
|
|
|
def _print_response(self, response, opts):
|
|
if opts.headers:
|
|
self._print_headers(response.request.headers, '>')
|
|
print('>')
|
|
self._print_headers(response.headers, '<')
|
|
else:
|
|
print(response.body)
|
|
|
|
def run(self, args, opts):
|
|
if len(args) != 1 or not is_url(args[0]):
|
|
raise UsageError()
|
|
cb = lambda x: self._print_response(x, opts)
|
|
request = Request(args[0], callback=cb, dont_filter=True)
|
|
request.meta['handle_httpstatus_all'] = True
|
|
|
|
crawler = self.crawler_process.create_crawler()
|
|
spider = None
|
|
if opts.spider:
|
|
spider = crawler.spiders.create(opts.spider)
|
|
else:
|
|
spider = create_spider_for_request(crawler.spiders, request, \
|
|
default_spider=Spider('default'))
|
|
crawler.crawl(spider, [request])
|
|
self.crawler_process.start()
|