Persistence iRule for Airwatch

I've been asked to write an iRule using CARP persistence and based on awcmsessionid. Found this on DevCentral and it was all I could find was wondering if anyone can tell if this works and/or have an iRule that does work. Thanks, Frank.

when HTTP_RESPONSE { Check the awcmsessionid header exists if { [HTTP::header exists "awcmsessionid"] } {

If it does, check it has a usable value
if { [HTTP::header value "awcmsessionid"] != "" } {
  If it does, use it to create a persistence record
  persist add uie [HTTP::header value "awcmsessionid"] 1800
}
else {
  log local0. "The awcmsessionid HTTP header was found but is null"
  No luck then, will need to rely on request query string if we can
}

}

If no header found log local0. "The awcmsessionid HTTP header was not found" }

when HTTP_REQUEST { Check the awcmsessionid header exists if { [HTTP::header exists "awcmsessionid"] } {

If it does, check it has a usable value
if { [HTTP::header value "awcmsessionid"] != "" } {
  If it does, use it to do a persistence lookup
  If you need to select a pool, do so here, before we persist
  persist uie [HTTP::header value "awcmsessionid"] 1800
  exit here to ensure we don't do two persistence lookups
  return
}
else {
  log local0. "The awcmsessionid HTTP header was found but is null"
  No luck then, will need to rely on request query string
}

}

No header so lets use the HTTP query instead, if we can Check the right string exists if { [string tolower [HTTP::query ]] contains "awcmsessionid" } {

The required query string is there, let's get it's value
We'll find awcmsessionid, move one to the right (the =)
and store data to the end of the query in our variable
set querystring [findstr [HTTP::query] "awcmsessionid" "1"]
Lets check its not null
if { $querystring != "" } {
  persist uie $querystring 1800
}
else {
  log local0. "No header or relevant query string found - can't persist"
}

}

}