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Please open a bpo for this. I don't know if one exists for this. I am not an expert but googling gets me to https://tools.ietf.org/html/rfc2616#section-3.3.1 that has the date format for cookie expires attribute that mandates a space character after comma. The MDN links to general Date header field so I am not sure if it can be used for cookies.

Set cookie date format RFC reference https://tools.ietf.org/html/rfc6265#section-4.1.1

Thanks for the report

In the regular expression, I think a question mark is more usual; I suggest “\s?” rather than “\s{0,1}”.

It would be good to add a test case.

In the regular expression, I think a question mark is more usual; I suggest “\s?” rather than “\s{0,1}”.

It would be good to add a test case.

Yes, that is obviously a better way.

Thanks for your guidance, I have modified the code and added the test. If I have other errors, please also point out.

This might require a NEWS entry since the space is optional but I don't know how to word it though.

https://devguide.python.org/committing/#what-s-new-and-news-entries

Also the PR title needs to be modified to the required format before committing I hope in with "bpo-35824" prefixed.

This might require a NEWS entry since the space is optional but I don't know how to word it though.

https://devguide.python.org/committing/#what-s-new-and-news-entries

I think it can be written like this:

Modify the parsing of Expires in Set-Cookie, Spaces and commas are both treated as delimiters.

If you think this works, I will add it and resubmit.

Modify the parsing of Expires in Set-Cookie, Spaces and commas are both treated as delimiters.

LGTM. Please include "Patch by <full_name>" at the end. It will keep the PR green and can be rephrased if needed by the core dev while merging.

Thanks

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