How to Log the HTTP/HTTPS request and response for specific URL

Its all how you customize.

when CLIENT_ACCEPTED {
set client [IP::client_addr]
log local0. "Client: $client has established a connection"      
}

when HTTP_REQUEST {
set client_info [IP::client_addr]:[TCP::client_port]
set url [HTTP::header Host][HTTP::uri]
log local0. "Client Source IP: $client_info is requesting URL: $url " 
}


when SERVER_CONNECTED {
set pool_name [LB::server pool]
log local0. "Client Source IP: [IP::client_addr]:[TCP::client_port] <--> POOL : $pool_name <--> ACTUALNODE <--> [IP::server_addr]:[TCP::server_port]" 
}