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improve docs for DownloaderMiddleware.process_response

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Mikhail Korobov 2013-07-08 19:17:29 +06:00
parent 163592ee40
commit 39e5da5f66
1 changed files with 6 additions and 5 deletions
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docs/topics/downloader-middleware.rst
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@ -87,19 +87,20 @@ single Python class that defines one or more of the following methods:
.. method:: process_response(request, response, spider)
:meth:`process_response` should return a :class:`~scrapy.http.Response`
object or raise a :exc:`~scrapy.exceptions.IgnoreRequest` exception.
:meth:`process_response` should return either a :class:`~scrapy.http.Response`
object, a :class:`~scrapy.http.Request` object or
raise a :exc:`~scrapy.exceptions.IgnoreRequest` exception.
If it returns a :class:`~scrapy.http.Response` (it could be the same given
response, or a brand-new one), that response will continue to be processed
with the :meth:`process_response` of the next middleware in the pipeline.
If it returns an :exc:`~scrapy.exceptions.IgnoreRequest` exception, the
response will be dropped completely and its callback never called.
If it returns a :class:`~scrapy.http.Request` object, the returned request will be
rescheduled to be downloaded in the future.
If it returns an :exc:`~scrapy.exceptions.IgnoreRequest` exception, the
response will be dropped completely and its callback never called.
:param request: the request that originated the response
:type request: is a :class:`~scrapy.http.Request` object