Rule to automatically "follow" an internal redirect?

 http://devcentral.f5.com/wiki/default.aspx/iRules/http__retry
 One can save a WAN round trip by following a redirect at the LTM and responding to the 
 original client request with the result of the redirect
when HTTP_REQUEST {

    Save the host header value
   set host [HTTP::host]
}
when HTTP_RESPONSE {

    Check if response is a redirect based on the status code
   if { [HTTP::is_redirect] } {

       Now generate a GET request to the new location
      HTTP::retry "GET [HTTP::header location] HTTP/1.1\r\nHost: $host\r\n\r\n"
   }
}