[squid-users] Re: Vary header caching problems

On Tue, 18 Sep 2001, Henrik Nordstrom wrote:

> Vary support is in the Squid-HEAD so it should work, BUT be warned that
> many HTTP servers set objects to expire immediately when generating a
> Vary header.
> What does the reply headers look like on the Vary:ing object?

The request from squid (as seen by the "upstream proxy") looks like:
GET http://XXX.uwaterloo.ca/test.gif HTTP/1.0
Accept: image/gif, image/x-xbitmap, image/jpeg, image/pjpeg,
application/vnd.ms-powerpoint, application/vnd.ms-excel,
application/msword, */*
Accept-Language: en-ca
User-Agent: Mozilla/4.0 (compatible; MSIE 6.0b; Windows NT 5.0)
X-MyHeader: 20,4
Via: 1.1 YYY.uwaterloo.ca:3128 (Squid/2.5-DEVEL)
X-Forwarded-For: 129.97.X.Y
Host: XXX.uwaterloo.ca
Cache-Control: max-age=259200

And the response from the upstream proxy (which in my case is actually the
one that understands the X-MyHeader header and adds the Vary response)
looks like:
HTTP/1.0 200 OK
Connection: close
Date: Mon, 17 Sep 2001 22:18:57 GMT
Server: Apache/1.3.20 (Unix) mod_ssl/2.8.4 OpenSSL/0.9.6a
Last-Modified: Thu, 30 Aug 2001 14:45:20 GMT
ETag: "1f538e-1f33-3b8e5180"
Accept-Ranges: bytes
Content-Type: image/gif
Vary: X-MyHeader

Could the ETag be causing a problem? I could try having the upstream
proxy remove it.

Thanks,
        Rick
Received on Tue Sep 18 2001 - 08:33:36 MDT