change this rewrite to apache htaccess

[millisami]

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??

Posted at Nginx Forum: http://forum.nginx.org/read.php?2,2398,2398#msg-2398