iRule redirect - change domain, path but keep unique ID

Ok, got it figured out, in case this helps anyone and so nobody wastes any time with it...

 

 

when HTTP_REQUEST {

 

if { [HTTP::uri] starts_with "/retrieve.asp"}{

 

HTTP::redirect "http://[string map {documents.test.com/retrieve.asp?guid= platform.test.com/Servicepages/RetrieveDocument.aspx?did=} [string tolower [HTTP::host]][HTTP::uri]]"

 

}

 

}