HTTP Referer headers

when HTTP_REQUEST {
    set referer [string tolower [HTTP::header value "Referer"]]
    
     Reject if Referer is not blank and does not start with https://123test123.com/
    if {($referer != "") && !($referer starts_with "https://123test123.com/")} {
        log local0.info "Rejecting request to [HTTP::uri] with Referer $referer"
        reject
    }
}