We recently developed an application using struts on tomcat.

The performance benchmarks are perfactly fine but we have a problem at network round 
trip end.

This is because even if the included JavaScripts/css/gif/jpeg  files, are all cached, 
still it checks for the last modified time with the web server and makes a round trip, 
wich increases the network latency.

When I searched for a solution to this problem, I came to know that HTTP specification 
provides a way for this, and that is:
to specify the expiers tag in HTTP Header.

But this has to be done against particular MIME types because the HTTP header applies 
to the payload only not to the cached JavaScript/CSS files.

Can someone please tell us how to configuer this.

I have observed over the internet that almost all good sites somehow have been able to 
manage to set this expires tag for all cached files.

Regards
Puneet Agarwal

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