gh-92936: allow double quote in cookie values #113663
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Jan 3, 2024
| @@ -442,7 +442,7 @@ def OutputString(self, attrs=None): | |||
| ( # Optional group: there may not be a value. | |||
| \s*=\s* # Equal Sign | |||
| (?P<val> # Start of group 'val' | |||
| "(?:[^\\"]|\\.)*" # Any doublequoted string | |||
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webob handles cookies with quotes more robustly: https://github.com/Pylons/webob/blob/main/src/webob/cookies.py#L335
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@orsenthil sorry for the random mention, but I saw you were active on some other cookie related issues in the past and wondered if you could review this or help me get pointed in the direction to find someone to review this? |
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As detailed more extensively in: #92936 it's not uncommon to see cookies with json and therefore double quotes in them. While IMO a well behaved application would base64 or otherwise encode those values, there are numerous services putting double quotes in the cookies, and it would be nice to have support for this directly in python so various http server/client/util libraries don't need to implement their own cookie parsing. Additionally browsers are tolerant of and handle double quotes in cookie values so
SimpleCookieshould also.Before this change
SimpleCookiewill without error drop cookie values that appear after a value with a double quote in them, which can lead to some very confusing and hard to debug issues when implementing http clients and servers.After this change
SimpleCookieallows a double quote character in the values section of the cookie while making no attempt to determine if the value is valid json or anything else (since that's a application/usecase specific concern)Downstream issues:
aio-libs/aiohttp#7993
yt-dlp/yt-dlp#4780