mchess-server/server/server.go

package server

import (
	"fmt"
	"log"
	"net/http"

	"github.com/gorilla/websocket"
)

var player_number = 0

var upgrader = websocket.Upgrader{} // use default options

func SocketHandler(w http.ResponseWriter, r *http.Request) {
	log.Println("SocketHandler invoked")

	conn, err := upgrader.Upgrade(w, r, nil)
	if err != nil {
		log.Print("Error during connection upgrading:", err)
		return
	}

	// Check if first message is the passphrase
	msg_type, msg, err := conn.ReadMessage()
	if err != nil {
		return
	}

	if string(msg) != "pw NC4EjHvRcsltY3ibWuYDH9OXbKgDXppfnHNCi1K4jktMspoeZjBnOPExxCpDms7zmxijoKCSaSlZ1fWclfWr7Q32DJnv2k87Z5uM" {
		conn.WriteMessage(msg_type, []byte("Wrong password. Connection refused"))
		return
	} else {
		conn.WriteMessage(msg_type, []byte("Password correct. Let's play"))
	}

	GetLobby().registerPlayer(NewPlayer("Player"+fmt.Sprint(player_number), conn))
	player_number = player_number + 1
}