Bump scrapy from 2.6.1 to 2.6.2 in /xpm2nix/python-modules

[dependabot]

Bumps scrapy from 2.6.1 to 2.6.2.

Release notes

Sourced from scrapy's releases.

2.6.2

Fixes a security issue around HTTP proxy usage, and addresses a few regressions introduced in Scrapy 2.6.0.

See the changelog.

Changelog

Sourced from scrapy's changelog.

Scrapy 2.6.2 (2022-07-25)

Security bug fix:

• When :class:~scrapy.downloadermiddlewares.httpproxy.HttpProxyMiddleware processes a request with :reqmeta:proxy metadata, and that :reqmeta:proxy metadata includes proxy credentials, :class:~scrapy.downloadermiddlewares.httpproxy.HttpProxyMiddleware sets the Proxy-Authentication header, but only if that header is not already set.

  There are third-party proxy-rotation downloader middlewares that set different :reqmeta:proxy metadata every time they process a request.

  Because of request retries and redirects, the same request can be processed by downloader middlewares more than once, including both :class:~scrapy.downloadermiddlewares.httpproxy.HttpProxyMiddleware and any third-party proxy-rotation downloader middleware.

  These third-party proxy-rotation downloader middlewares could change the :reqmeta:proxy metadata of a request to a new value, but fail to remove the Proxy-Authentication header from the previous value of the :reqmeta:proxy metadata, causing the credentials of one proxy to be sent to a different proxy.

  To prevent the unintended leaking of proxy credentials, the behavior of :class:~scrapy.downloadermiddlewares.httpproxy.HttpProxyMiddleware is now as follows when processing a request:

  • If the request being processed defines :reqmeta:proxy metadata that includes credentials, the Proxy-Authorization header is always updated to feature those credentials.

  • If the request being processed defines :reqmeta:proxy metadata without credentials, the Proxy-Authorization header is removed unless it was originally defined for the same proxy URL.

    To remove proxy credentials while keeping the same proxy URL, remove the Proxy-Authorization header.

  • If the request has no :reqmeta:proxy metadata, or that metadata is a falsy value (e.g. None), the Proxy-Authorization header is removed.

    It is no longer possible to set a proxy URL through the :reqmeta:proxy metadata but set the credentials through the Proxy-Authorization header. Set proxy credentials through the :reqmeta:proxy metadata instead.

... (truncated)

Commits

• aecbccb Bump version: 2.6.1 → 2.6.2
• af7dd16 Merge pull request from GHSA-9x8m-2xpf-crp3
• 4205609 Fixed intersphinx references
• e3e69d1 Pin documentation requirements (#5536)
• 54bfb96 Cover #5525 in the 2.6.2 release notes (#5535)
• 4ef7182 If TWISTED_REACTOR is None, reuse any pre-installed reactor (#5528)
• 1c1cd5d Update the 2.6.2 release notes
• 84c29a2 Unset the release date of still-unreleased 2.6.2 (#5503)
• b9b9422 Merge pull request #5482 from alexpdev/parse_help_msg
• 915c288 edit
• Additional commits viewable in compare view

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