irule to capture server ---> to client traffice and vice versa

when HTTP_REQUEST {
set methodvar [HTTP::method]
set hostvar [HTTP::host]
set urivar [HTTP::uri]
set clientvar [IP::remote_addr]
   log local0. "Client: [IP::remote_addr]:[TCP::remote_port] requested [HTTP::method] / [HTTP::host][HTTP::uri]"
}
when HTTP_RESPONSE {
   if { [HTTP::status] eq "503" } {
     log local0. "$clientvar received 503 error for $methodvar / $hostvar$urivar" }
}