Old URL 404, compare URI with external data group file

If you're on 9.4.7 you'll want to use the findclass command.

Your class would look like:

class_name {

"man-in-band http://www.xyz.com/event/98473/man-in-band",

"band-in-park http://www.xyz.com/venue/9383783/band-in-park"

}

And your logic would change slightly to:

when HTTP_REQUEST {
  set uri_token [string range [HTTP::path] [expr {[string last / [HTTP::path]] + 1}] end]
}

when HTTP_RESPONSE {
  if {[HTTP::status] == 404} {
    set red_uri [findclass $uri_token class_name " "]
    HTTP::redirect $red_uri
  }
}

Colin