iRule resulting in too many redirects

Lucas_Thompson did get me thinking about the flow. I moved the "HTTP::redirect $new_url" to HTTP_RESPONSE thinking that it might be because it is redirecting to itself and each request was doing the same thing over and over. It didn't work, but the logic to me seems sound. 

Should the HTTP::redirect be in the response?

Am I just mucking up the logic here? Should I check to make sure the incoming path is correct and if not, then redirect?