Re: [squid-users] Squid is not caching content in reverse proxy mode

On 6/07/2012 6:10 a.m., Abhishek Chanda wrote:
> Hi all,
>
> Thanks for the responses.
> I am using squid 3.1 on Ubuntu 12.04. For now I am just trying to
> cache Apache's default "it works" page, which should be cache able. I
> cannot use rebot here since my network is not connected to the
> Internet.
>
> I tried to do the configuration from scratch again using the guideline at
> http://wiki.squid-cache.org/ConfigExamples/Reverse/BasicAccelerator
> and here is the new config:
>
> http_port 80 accel defaultsite=cona-server vhost
> cache_peer 192.168.122.21 parent 80 0 no-query originserver name=myAccel
> acl our_sites dstdomain cona-server
> http_access allow our_sites
> cache_peer access myAccel allow our_sites
> cache_peer access myAccel deny all
>
> acl manager proto cache_object
> acl localhost src 127.0.0.1/32 ::1
> acl to_localhost dst 127.0.0.1/8 0.0.0.0/32 ::1
> acl SSL_ports port 443
> acl Safe_ports port 80
> acl Safe_ports port 21
> acl Safe_ports port 443
> acl Safe_ports port 70
> acl Safe_ports port 210
> acl Safe_ports port 1025-65535
> acl Safe_ports port 280
> acl Safe_ports port 488
> acl Safe_ports port 591
> acl Safe_ports port 777
> acl CONNECT method CONNECT
> http_access allow all
> http_access allow manager localhost
> http_access deny manager
> http_access deny !Safe_ports
> http_access deny CONNECT !SSL_ports
> http_access allow localhost
> http_access deny all
> http_port 3128
> coredump_dir /var/spool/squid3
> refresh_pattern ^ftp: 1440 20% 10080
> refresh_pattern ^gopher: 1440 0% 1440
> refresh_pattern -i (/cgi-bin/|\?) 0 0% 0
> refresh_pattern (Release|Packages(.gz)*)$ 0 20% 2880
> refresh_pattern . 0 20% 4320
>
> Now, I noticed a strange behavior. With this config, squid was saying
> TCP_REFRESH_UNMODIFIED, then when I restarted squid, it said TCP_MISS.
> Then I cleared the browser cache and then Squid said
> TCP_REFRESH_UNMODIFIED again. Is this expected?

If you are testing by pressing the force-refresh button on the browser
it sends controls to Squid requiring the server be re-contacted with an
refresh check. The server appears to be sending back data identical to
the last lot and Squid detects the lack of change, logs
REFRESH_UNMODIFIED. The expected result is a 304 arriving at the browser
from Squid.

Amos
Received on Fri Jul 06 2012 - 07:22:19 MDT