Поддержка трассировки на стороне сервера была добавлена намного раньше, в Go 1,3 .Создайте свой собственный http.Server
и установите функцию обратного вызова в поле Server.ConnState
.
// ConnState specifies an optional callback function that is
// called when a client connection changes state. See the
// ConnState type and associated constants for details.
ConnState func(net.Conn, ConnState) // Go 1.3
http.ConnState
подробно, когда / какое соединение устанавливает состояниеобратный вызов уведомляется о.
// StateNew represents a new connection that is expected to
// send a request immediately. Connections begin at this
// state and then transition to either StateActive or
// StateClosed.
StateNew ConnState = iota
// StateActive represents a connection that has read 1 or more
// bytes of a request. The Server.ConnState hook for
// StateActive fires before the request has entered a handler
// and doesn't fire again until the request has been
// handled. After the request is handled, the state
// transitions to StateClosed, StateHijacked, or StateIdle.
// For HTTP/2, StateActive fires on the transition from zero
// to one active request, and only transitions away once all
// active requests are complete. That means that ConnState
// cannot be used to do per-request work; ConnState only notes
// the overall state of the connection.
StateActive
// StateIdle represents a connection that has finished
// handling a request and is in the keep-alive state, waiting
// for a new request. Connections transition from StateIdle
// to either StateActive or StateClosed.
StateIdle
// StateHijacked represents a hijacked connection.
// This is a terminal state. It does not transition to StateClosed.
StateHijacked
// StateClosed represents a closed connection.
// This is a terminal state. Hijacked connections do not
// transition to StateClosed.
StateClosed
Простой пример:
srv := &http.Server{
Addr: ":8080",
ConnState: func(conn net.Conn, cs http.ConnState) {
fmt.Println("Client:", conn.RemoteAddr(), "- new state:", cs)
},
}
log.Fatal(srv.ListenAndServe())
Выполнение запроса к вышеуказанному серверу:
curl localhost:8080
Выходные данные сервера будут:
Client: 127.0.0.1:39778 - new state: new
Client: 127.0.0.1:39778 - new state: active
Client: 127.0.0.1:39778 - new state: idle
Client: 127.0.0.1:39778 - new state: closed