On Tue, 10 Nov 2009 07:03:34 -0500, "Sheahan, John" <John.Sheahan@xxxxxxxxxxxxx> wrote: > While troubleshooting an internet problem using a sniffer, I noticed that > when end users use our Squid proxy server, the client always uses HTTP 1.0 > only and never HTTP 1.1. > I double checked and the advanced settings in my browser (IE 7) are set to > force HTTP 1.1 whenever possible and when using a proxy but this isn't > happening. > > When I remove the proxy from the equation and go straight out to the > internet, the clients always use HTTP 1.1. > > Is this a limitation with Squid? Yes. Squid is HTTP/1.0 software with various upgrades to handle 1.1, though not quite enough to be allowed to advertise it safely. Squid-2.7 was given some config options which can turn on advertising of HTTP/1.1 to servers and test for problems. However this has known issues whenever the client and Server attempt to use REQUIRED HTTP/1.1 features which Squid cannot handle (requests with Expect: headers being the biggest common one). We have done more towards HTTP/1.1 support for Squid-3.1, but have not made the options to advertise it available. Hopefully someone will have time to add the missing feature support one day. There is a downloadable checklist spreadsheet of HTTTP/1.1 features at http://wiki.squid-cache.org/Features/HTTP11 if you want to compare Squid capabilities with your needs. Amos
