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"""
Download timeout middleware
See documentation in docs/topics/downloader-middleware.rst
"""
from scrapy.utils.python import WeakKeyCache
class DownloadTimeoutMiddleware(object):
def __init__(self):
self._cache = WeakKeyCache(self._download_timeout)
def _download_timeout(self, spider):
if hasattr(spider, 'download_timeout'):
return spider.download_timeout
return spider.settings.getint('DOWNLOAD_TIMEOUT')
def process_request(self, request, spider):
timeout = self._cache[spider]
if timeout:
request.meta.setdefault('download_timeout', timeout)
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