user_agent field in the http header

For this you would use the "contains" operator. This returns a positive on the match regardless of the positioning of the string you're searching for within the header.

 

 

when HTTP_REQUEST {
  if{ HTTP::header "User-Agent"] contains "test" } {
    pool testpool
  }
}

 

 

This would match test anywhere inside the User-Agent header. So the code Joe provided would work just fine.

 

 

Hope this helps,

 

 

-Colin