func ProxyWebSocket()

in terminal.go [68:103]
27 lines of code
4 McCabe index (conditional complexity)

func ProxyWebSocket(w http.ResponseWriter, r *http.Request, terminal *TerminalSettings, proxy *WebSocketProxy) {
	server, err := connectToServer(terminal, r)
	if err != nil {
		fail500(w, r, err)
		log.WithError(err).Print("Terminal: connecting to server failed")
		return
	}
	defer server.UnderlyingConn().Close()
	serverAddr := server.UnderlyingConn().RemoteAddr().String()

	client, err := upgradeClient(w, r)
	if err != nil {
		log.WithError(err).Print("Terminal: upgrading client to websocket failed")
		return
	}

	// Regularly send ping messages to the browser to keep the websocket from
	// being timed out by intervening proxies.
	go pingLoop(client)

	defer client.UnderlyingConn().Close()
	clientAddr := getClientAddr(r) // We can't know the port with confidence

	logEntry := log.WithFields(log.Fields{
		"clientAddr": clientAddr,
		"serverAddr": serverAddr,
	})

	logEntry.Print("Terminal: started proxying")

	defer logEntry.Print("Terminal: finished proxying")

	if err := proxy.Serve(server, client, serverAddr, clientAddr); err != nil {
		logEntry.WithError(err).Print("Terminal: error proxying")
	}
}