> I was able to get things to work in Firefox. Your tip about refresh > always getting a MISS or REFRESH_HIT helped solve it. > > However, I am still seeing some different behavior in my curl. > > When I hit the page with Firefox I see that the page is being cached > appropriately. However, when I hit the same page with curl, it does > not seem to get the cached version. My curl is now returning the page > correctly, however every time I connect it is not getting the cached > version. > > I have confirmed that it is going through the proxy (my webserver will > not accept traffic that isn't through the proxy), so I am a little > confused. Check the headers curl is sending to squid. particularly the Cache-Control or Pragma: values. no-cache, no-store, and private are killers. Amos > > Thanks! > -hortitude > > On Tue, Mar 10, 2009 at 9:04 PM, Amos Jeffries <squid3@xxxxxxxxxxxxx> > wrote: >> Hortitude Eyeball wrote: >>> >>> 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. >> >> NP: pressing the refresh button n a web browser sends a special header >> to >> refresh the page, at minimum forcing squid to check for an updated >> version. >> Your web server as ircache reports sends a new object when asked about >> modification. This will result in REFRESH_HIT or MISS. >> >>> 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" >> >> From that description I'd guess you have a domain name which resolves to >> your Squid box AND the web server? >> >> 400 from squid is probably a forwarding loop? >> >> >>> >>> 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"; >>> ?> >> >> >> Amos >> -- >> Please be using >> Current Stable Squid 2.7.STABLE6 or 3.0.STABLE13 >> Current Beta Squid 3.1.0.6 >> >
