mirror of https://github.com/scrapy/scrapy.git
21 lines
573 B
Python
21 lines
573 B
Python
"""
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DefaultHeaders downloader middleware
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See documentation in docs/topics/downloader-middleware.rst
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"""
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from scrapy import conf
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from scrapy.utils.python import WeakKeyCache
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class DefaultHeadersMiddleware(object):
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def __init__(self, settings=conf.settings):
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self._headers = WeakKeyCache(self._default_headers)
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def _default_headers(self, spider):
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return spider.settings.get('DEFAULT_REQUEST_HEADERS').items()
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def process_request(self, request, spider):
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for k, v in self._headers[spider]:
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request.headers.setdefault(k, v)
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