The following post explains about the page caching in rails with Nginx.

http://blog.hasmanythrough.com/2008/1/30/segregated-page-cache-storage

I like to implement this solution with my app but on Apache. So, the main block/route is

if (-f $request_filename) {
break;
}
if (-f /cache$request_filename) {
rewrite (.*) /cache$1 break;
break;
}

if (-f /cache$request_filename.html) {
rewrite (.*) /cache$1.html break;
break;
}
What could be the Apache equivalent for the above Nginx related code??