* Drop py34 support
* Travis experiments
* More Travis experiments
* Bump Twisted version for py35+ (stretch)
* Remove Debian build
* Remove pinned lxml for Py34
* Fix merge error
* Remove unused tox env
* Add environment with pinned versions for py36
* Bump minimum Twisted version in py27; Envs with pinned versions for py27 and py35
* Add botocore as extra dep for py27 tests
* Update requirements-py2.txt
* Add botocore and Pillow as extra dependencies
Make the robots.txt parser configurable through the new ROBOTSTXT_PARSER setting, support the Reppy and Robotexclusionrulesparser parsers, and allow implementing custom robots.txt parsers.
Add a setting to use active mode in FTPFeedStorage
FTP servers can be configured in active and passive mode, by default
Python and Scrapy use passive mode and there was no way to use active.
This commit adds a setting FEED_STORAGE_FTP_ACTIVE to allow a feed
to be exported to a FTP server configured in active mode.
We're storing exceptions captured by Twisted on the media pipeline
cache, but we're also using the defer.returnValue method with our
own methods decorated with @defer.inlineCallbacks.
The defer.returnValue method passes returned values forward by
throwing a defer._DefGen_Return exception, which in its turn
extends the BaseException class and is captured by Twisted.
This way, the latest exception stored in the Failure's object may
also have an HtmlResponse object in its __context__ attribute. As
the Response object also keeps track of the Request object that
has originated it, you could figure it out how many RAM we're
wasting here.
This could easily lead to a Memory Leak problem when running
spiders with Media Pipeline enabled and a particular Request set
that tends to raise a significant number of exceptions.
Example triggers:
- media requests with 404 status responses
- user land exceptins coming from custom middlewares
- etc.