Persistence for selected URIs on a VS

Your code looks a lot like what I came up with after further searching, so that's reassuring.

when HTTP_REQUEST {
    switch -glob [string tolower [HTTP::path]]  {
        "/blahblah/app/*" -
        "/blahblah/api/*" {
            # If client is public IP then send 404
            if { not ([class match [IP::client_addr] equals private_net]) } {
                HTTP::respond 404 content "HTTP ERROR 404 Reason:Not Found" Mime-Type "text/html"
                event disable
                TCP::close
            } else {
                # If client is private IP set cookie persistence
                persist cookie insert blahblah_Cookie 0 
            }
        }
    }
}

The second question is just to block those from non-RFC1918 IP space. I included that in my irule but feel free to tell me if there's a better way.