Stealth Redirection or URL Hiding

funny thing, everytime I add the line it apends a www.www.abc.com to the front of it..but I dont have a rule adding a www to my test virtual server

I tried to change this(HTTP::uri [string map {"/news" "/"} [HTTP::uri]]) where "/" is "/hi" and it doesnt work.

when HTTP_REQUEST {
        switch -glob [string tolower [HTTP::uri]] {
            "/news*"  {
                pool news.xxx.com-pool
                HTTP::uri [string map {"/news" "/"} [HTTP::uri]]
            }
            default {
                pool www.abc.com-pool
            }
        }
    }