Problem figuring out how to rewite what is sent to pool

I was thinking about something like this, but it is for the simplest case and is not tested:

when HTTP_REQUEST {
    set pathvar [HTTP::path]
    string map {"/tr1" ""} $pathvar
    HTTP::path $pathvar 
}

There is a lot to consider though...

-Would /tr1 show up anywhere else in a URL that is valid?

-Should the user see the new path in their address bar or not?

-Do we need to do this for every case or should there be some logic?

Hope that helps...