I am trying to setup Squid to be a simple proxy-cache. I am seeing two strange behaviors. I have 3 machines. I am using one as my web browser, one as my proxy-cache and the third as my web server. When I configure my web browser (Firefox) to connect through my proxy-cache to my web server I see content as expected, however it does not seem to be cached. The web page I am using is at the bottom of this post. When I view the web page I keep seeing the time change, so I know that it is not being cached. Furthermore, when I use curl to through the proxy and look at the headers using the -D option I see a 400 error from the proxy server and then a 200 from the web server? I also see a message from the squid server of "Invalid Request" When I run my web page through http://www.ircache.net/cgi-bin/cacheability.py it says" This object will be fresh for 20 hr 22 min. It has a validator present, but when a conditional request was made with it, the same object was sent anyway. Can anyone help? Thanks! I am running SQUID 2.7.STABLE3 on Ubuntu. I have not changed the config much at all. I did a grep of all options that are set in the config file and have included them here: acl all src all acl manager proto cache_object acl localhost src 127.0.0.1/32 acl to_localhost dst 127.0.0.0/8 acl localnet src 10.0.0.0/8 # RFC1918 possible internal network acl localnet src 172.16.0.0/12 # RFC1918 possible internal network acl localnet src 192.168.0.0/16 # RFC1918 possible internal network acl SSL_ports port 443 # https acl SSL_ports port 563 # snews acl SSL_ports port 873 # rsync acl Safe_ports port 80 # http acl Safe_ports port 21 # ftp acl Safe_ports port 443 # https acl Safe_ports port 70 # gopher acl Safe_ports port 210 # wais acl Safe_ports port 1025-65535 # unregistered ports acl Safe_ports port 280 # http-mgmt acl Safe_ports port 488 # gss-http acl Safe_ports port 591 # filemaker acl Safe_ports port 777 # multiling http acl Safe_ports port 631 # cups acl Safe_ports port 873 # rsync acl Safe_ports port 901 # SWAT acl purge method PURGE acl CONNECT method CONNECT http_access allow manager localhost http_access deny manager http_access allow purge localhost http_access deny purge http_access deny !Safe_ports http_access deny CONNECT !SSL_ports http_access allow localhost http_access allow localnet http_access deny all icp_access allow localnet icp_access deny all http_port 3128 hierarchy_stoplist cgi-bin ? access_log /var/log/squid/access.log squid refresh_pattern ^ftp: 1440 20% 10080 refresh_pattern ^gopher: 1440 0% 1440 refresh_pattern -i (/cgi-bin/|\?) 0 0% 0 refresh_pattern . 0 20% 4320 acl apache rep_header Server ^Apache broken_vary_encoding allow apache extension_methods REPORT MERGE MKACTIVITY CHECKOUT hosts_file /etc/hosts coredump_dir /var/spool/squid ------------------------------------------------------------------------------------------- Here is the web page I am using <?php // the time we got hit and generated content $now = time(); $generatedAt = gmdate('D, d M Y H:i:s T', $now); // the last modified date (midnight on the same day of generation, as // per your business-rule) $lastModified = gmdate('D, d M Y 00:00:00 T', $now); // date of expiry (24 hours after the last modified date, as per your // business-rule) $expiresAt = gmdate('D, d M Y H:i:s T', strtotime($lastModified) + 86400); // the minimum required http headers to make Squid do what you asked is // Last-modified and Cache-control. We need to give Cache-control the // expiry time in terms of "age" (in seconds) so we calculate that below. // Optionally you could also provide the "Expires: $expiresAt" header to // tell the browser/client the same information, just in a different way. // This is not required for Squid though. $maxAge = strtotime($expiresAt) - strtotime($generatedAt); header('Last-modified: ' . $lastModified); header('Cache-control: max-age=' . $maxAge); header ('Expires: '.$expiresAt); // The rest is simply informational header('Content-type: text/plain'); echo "The content of this page was last modified at $lastModified\n"; echo "This page was generated at $generatedAt and will be cached by Squid for $maxAge seconds until $expiresAt\n"; ?>
