I have a page which gets cached by Firefox. Google Page Speed says it's
cacheable as well. Squid does not cache it.
I'm running Squid v3.3.8. My configuration is pretty standard... I'll post
it if need be.
The page is being served through Apache's mod_asis so I can explicitly set
the headers. Here it is:
=====
Status: 200 A-OK
Date: Wed, 04 Sep 2013 15:32:28 GMT
Cache-Control: public
Expires: Thu, 05 Sep 2013 15:32:28 GMT
Vary: Accept-Encoding
Content-Type: text/html
<html>
<body>
hello, world
</body>
</html>
=====
When I visit the page in Firefox (I have to disable browser caching in
order to get it to send the request in the first place), my browser
sends/receives the following headers (according to Firebug):
=====
GET http://example.com/test.asis HTTP/1.1
Host: example.com
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.7; rv:23.0)
Gecko/20100101 Firefox/23.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Connection: keep-alive
HTTP/1.1 200 OK
Date: Wed, 04 Sep 2013 17:09:48 GMT
Server: Apache/2.2.25 (Unix) mod_ssl/2.2.25 OpenSSL/1.0.1e DAV/2
mod_perl/2.0.7 Perl/v5.12.4
Cache-Control: public
Expires: Thu, 05 Sep 2013 15:32:28 GMT
Vary: Accept-Encoding
Content-Length: 43
Content-Type: text/html
X-Cache: MISS from webcache-dev1.cc.columbia.edu
Via: 1.1 webcache-dev1.cc.columbia.edu (squid/3.3.8)
Connection: keep-alive
=====
I get this response every time (as in, X-Cache: MISS). I know the Date
header gets changed (probably by apache using the last-modified time) as
well as the Status, but the Expires header is still there (and still in the
future). This should be cached, right? Apparently Google's Page Speed
tool and Firefox think so.
Out of curiosity, I removed the Vary header. Squid then started caching
the page.
Did I run into a bug with 3.3.8? I did several searches but wasn't able to
find anything about this issue.
-- Geoffrey Schwartz Columbia University - CUIT Ext. 19835Received on Wed Sep 04 2013 - 17:35:22 MDT
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