func ProxyFileDescriptor()

in terminal.go [109:137]

• 21 lines of code
• 3 McCabe index (conditional complexity)

func ProxyFileDescriptor(w http.ResponseWriter, r *http.Request, fd *os.File, proxy *FileDescriptorProxy) {
	clientConn, err := upgradeClient(w, r)
	if err != nil {
		log.WithError(err).Print("Terminal: upgrading client to websocket failed")
		return
	}
	client := NewIOWrapper(clientConn)

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

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

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

	logEntry.Print("Terminal: started proxying")

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

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