Help on persist and/or persist add

Hi Kevin

Thanks for the answer. Bit clearer now. I believe the session ID is sent in Location field, but still awaiting confirmation. Assuming it is would the below be a good approach to capture the session in the response and check requests.

when HTTP_RESPONSE {
  if {[HTTP::header exists Location]} {
     get next 2 characters after ID= and assign value to parameter sessid
    set sessid [findstr [HTTP::header Location] "ID=" 3 2]
     If value for sessid is not empty add a persistance entry
    if { $sessid != "" } {
    persist add uie $sessid 600
      log local0. "[IP::client_addr]:[TCP::client_port], Session ID: $sessid, created persist record: [persist lookup uie $sessid]"
    } else {
      log local0. "[IP::client_addr]:[TCP::client_port], No Session ID"
        }
      }
    }


when HTTP_REQUEST {
  if { [HTTP::uri] contains "ID=" } {
      get next 2 characters after ID= and assign value to parameter sessid
     set sessid [findstr [HTTP::uri] "ID=" 3 2]
      If value is not empty then persist on the session ID
     if { $sessid != "" } {
         persist uie $sessid }
          if value is empty then no persistence
     else {
      persist none
    }
  }
}