id	summary	reporter	owner	description	type	status	component	version	severity	resolution	keywords	cc	stage	has_patch	needs_docs	needs_tests	needs_better_patch	easy	ui_ux
36397	Syndication Feed Server ignores 'Last-Modified' date (Debian#926074)	Christian Buhtz		"Hello,
First please take my apologize for writing such a broad ticket. But others, with more intel, I asked, didn't.

This is related to a (6 year old) Debian bug ticket: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=926074
In short: The modified date is ignored by the server.

The Debian folks telling me that Django is somehow involved and there should go a bug ticket and fix.
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=926074#10

I can not tell because I lack of deeper understanding of the underlying technology.

I do have minimal working example demonstrating the problem with the Debian server.

{{{
>>> url = 'https://tracker.debian.org/pkg/feedparser/rss'
>>> import feedparser as fp
>>> a = fp.parse(url)
>>> import json
>>> print(json.dumps(a.headers, indent=4))
{
    ""X-Clacks-Overhead"": ""GNU Terry Pratchett"",
    ""X-Xss-Protection"": ""1"",
    ""Transfer-Encoding"": ""chunked"",
    ""Last-Modified"": ""Sat, 30 Mar 2019 13:06:51 GMT"",
    ""Public-Key-Pins"": ""pin-
sha256=\""M9Wyk2x6hLne/VkyJWFx33+LB8s+kAaMbO49fnm5fEY=\""; pin-
sha256=\""ZsBWn0bekrum/1CJtBlg5yZ2eqRywN6YwGeBS31nH+s=\""; max-age=5184000"",
    ""Strict-Transport-Security"": ""max-age=15552000"",
    ""Content-Type"": ""application/rss+xml; charset=utf-8"",
    ""X-Content-Type-Options"": ""nosniff"",
    ""Connection"": ""close"",
    ""Referrer-Policy"": ""same-origin"",
    ""Content-Encoding"": ""gzip"",
    ""X-Frame-Options"": ""sameorigin"",
    ""Server"": ""Apache"",
    ""Vary"": ""Cookie,Accept-Encoding"",
    ""Date"": ""Sun, 31 Mar 2019 11:11:03 GMT""
}
>>> a.modified
'Sat, 30 Mar 2019 13:06:51 GMT'
>>> b = fp.parse(url, modified=a.modified)
>>> len(a.entries)
30
>>> len(b.entries)
30
}}}

I would expect ""b.entries"" should be (near) 0.

I also can not tell wich version of Django is used by Debian.

Maybe you can give some comments in the Debian ticket?

Regards,
Christian"	Bug	closed	contrib.syndication	4.2	Normal	invalid		Colin Watson	Unreviewed	0	0	0	0	0	0