https://bugzilla.wikimedia.org/show_bug.cgi?id=54195
Web browser: ---
Bug ID: 54195
Summary: CentralAuth not caching Special:CentralAutoLogin/start
Product: MediaWiki extensions
Version: master
Hardware: All
OS: All
Status: NEW
Severity: major
Priority: Unprioritized
Component: CentralAuth
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected], [email protected],
[email protected], [email protected],
[email protected]
Classification: Unclassified
Mobile Platform: ---
Ops pointed out that almost 60% of the apache traffic is calls to
Special:CentralAutoLogin. About half of that traffic is to /start, so it looks
like Special:CentralAutoLogin/start is still not cached, even though we don't
disable client caching in the output page. MediaWiki is sending Cache-Control
private.
csteipp@linux-hv06:~> curl -Ik
'https://en.wikipedia.org/wiki/index.php?title=Special:CentralAutoLogin/start&type=script&returnto=One&returntoquery='
| grep Cache-Control
Cache-Control: private, s-maxage=0, max-age=0, must-revalidate
It seems like that is because OutputPage checks to see if $this->mSquidMaxage
!= 0, otherwise it sends out the private header. On my dev system, I added
$this->getOutput()->setSquidMaxage( 3600 ), and I then get
csteipp@linux-hv06:~> curl -Ik
'https://127.0.0.1/wiki_port83/de/index.php?title=Special:CentralAutoLogin/start&type=script&returnto=One&returntoquery='
HTTP/1.1 302 Found
Date: Mon, 16 Sep 2013 23:32:21 GMT
Server: Apache/2.2.22 (Linux/SUSE)
X-Powered-By: PHP/5.3.17
X-Content-Type-Options: nosniff
P3P: CP="This is not a P3P policy! See
http://127.0.0.1/wiki_port83/de/index.php?title=Special:CentralAutoLogin/P3P
for more info."
Vary: Accept-Encoding,Cookie
Cache-Control: s-maxage=3600, must-revalidate, max-age=0
Location:
https://127.0.0.1/wiki_port83/pool/index.php?title=Special:CentralAutoLogin/checkLoggedIn&wikiid=dewiki83&proto=https&type=script&returnto=One&returntoquery=
Content-Type: text/html; charset=utf-8
Is that enough to have varnish cache these, but logged in users will always
bypass the cache?
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