Hi All, I've been trying to improve my webapp's performance by telling Apache [2.2.4] to force clients to cache static content using mod_expires. I'm basically trying to avoid having the client browser resend the 'if-modified' conditional request for the static content upon a refresh or a revisit to the site, thus saving the round-trip time and having the page presented straight from cache . For this, I've added the following lines to my httpd.conf:
LoadModule expires_module modules/mod_expires.so ExpiresActive on ExpiresDefault "access plus 2 hours" ExpiresByType image/gif "access plus 7 days" ExpiresByType image/jpeg "access plus 7 days" ExpiresByType text/css "access plus 7 days" ExpiresByType application/x-javascript "access plus 12 hours" The problem is that for some reason this doesn't seem to work, and the browser [ie6] still sends the conditional requests, disregarding the expiration directive. here is an example HTTP traffic caputre (using Fiddler): First Request GET /Eip/Static/Images/Logos/siteLogo.gif HTTP/1.0 Accept: */* Referer: http://qcxp2/Eip/bin/ibp.jsp?ibpPage=HomePage&; Accept-Language: he Proxy-Connection: Keep-Alive User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; InfoPath.1; FDM; .NET CLR 2.0.50727; .NET CLR 3.0.04506.30) Host: qcxp2 Cookie: JSESSIONID=4662B8AA7EC6B9AE09258672CBDCE54C First Response HTTP/1.1 200 OK Date: Wed, 24 Oct 2007 08:37:29 GMT Server: Apache/2.2.4 (Win32) mod_jk/1.2.25 Last-Modified: Mon, 17 Sep 2007 09:00:24 GMT ETag: "8e5a-782-8f6da00" Accept-Ranges: bytes Content-Length: 1922 Cache-Control: max-age=604800 Expires: Wed, 31 Oct 2007 08:37:29 GMT Connection: close Content-Type: image/gif GIF89a] Second Request (the one that souldn't actually occur at all) GET /Eip/Static/Images/Logos/siteLogo.gif HTTP/1.0 Accept: */* Referer: http://qcxp2/Eip/bin/ibp.jsp?ibpPage=HomePage&; Accept-Language: he Proxy-Connection: Keep-Alive If-Modified-Since: Mon, 17 Sep 2007 09:00:24 GMT If-None-Match: "8e5a-782-8f6da00" User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; InfoPath.1; FDM; .NET CLR 2.0.50727; .NET CLR 3.0.04506.30) Host: qcxp2 Pragma: no-cache Cookie: JSESSIONID=4662B8AA7EC6B9AE09258672CBDCE54C Second Response HTTP/1.1 304 Not Modified Date: Wed, 24 Oct 2007 08:41:12 GMT Server: Apache/2.2.4 (Win32) mod_jk/1.2.25 Connection: close ETag: "8e5a-782-8f6da00" Expires: Wed, 31 Oct 2007 08:41:12 GMT Cache-Control: max-age=604800 Any ideas? Uri
