On 13 Jul 2011, at 20:40, Tim Watts wrote: > Hi all, > > Quick pointer would be most welcomed: > > I have mod_proxy_http in use to front-end a tomcat server. > > Sadly the tomcat programmers omitted to set cache control headers (eg > Expires) and the tomcat servers are being overloaded, despite the content > being totally invariant. I don't "do" JSP so messing about at that end is out > for me.
If the contents are invariant then, um, does it really Expire? Last-Modified, Cache-Control and Etag may be more useful. > So I'd like to shove a cache in front - and an agressive one at that, that > handled GET requests too. > > > > I normally use mod_cache_disk for this with good effect but the lack of > Expires (etc) headers are falling foul. > > I have considered an output filter to force the headers in as mod_headers > does not seem to play nice with mod_proxy. Where's the problem? mod_headers doesn't care whether it's in a proxy (though it's possible mod_proxy is suppressing it - haven't looked of late). > Is it at all likely that I could get mod_ext_filter (IIRC), mod_cache and > mod_proxy to play nice? mod_ext_filter won't do anything for your headers. > Next option is to hack mod_proxy (there was a 1.3 patch that allowed > manipulating output headers) - would that play nice with mod_cache? 1.3 mod_proxy made no attempt to support HTTP/1.1 - which makes it pretty-much useless for cacheing. > I do have Squid as a fallback - or I suppose a separate Apache instance - but > it's getting a bit hairy and overweight. A light solution would be good - I > have a 100+ servers I could usefully apply this too :) > > Any suggestions would be cool - I'm happy to graft, but as long as I start in > the right direction :) mod_headers seems the obvious hack to fix it. If there's a specific problem with it, why not ask here - maybe you have a feature request? -- Nick Kew Available for work, contract or permanent http://www.webthing.com/~nick/cv.html --------------------------------------------------------------------- The official User-To-User support forum of the Apache HTTP Server Project. See <URL:http://httpd.apache.org/userslist.html> for more info. To unsubscribe, e-mail: users-unsubscr...@httpd.apache.org " from the digest: users-digest-unsubscr...@httpd.apache.org For additional commands, e-mail: users-h...@httpd.apache.org
