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"""
Download timeout middleware
See documentation in docs/topics/downloader-middleware.rst
"""
from scrapy import signals
class DownloadTimeoutMiddleware(object):
def __init__(self, timeout=180):
self._timeout = timeout
@classmethod
def from_crawler(cls, crawler):
o = cls(crawler.settings['DOWNLOAD_TIMEOUT'])
crawler.signals.connect(o.spider_opened, signal=signals.spider_opened)
return o
def spider_opened(self, spider):
self._timeout = getattr(spider, 'download_timeout', self._timeout)
def process_request(self, request, spider):
if self._timeout:
request.meta.setdefault('download_timeout', self._timeout)
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