Redirecting and masquerading the result for the client.

If you are just trying to get content from another location when a client makes a request then you can simply point to a pool with the web server and use rules, HTTP profiles, and/or HTTP_classes to mangle the traffic as needed. You can also pipe in content via sideband if you want to glue some things together in response to requests.

From my response I'm obviously having issues with the request to redirect and the use of HTTP::header other than to mask what you did after getting the request.