socket.io 没有监听全局事件

Question

我正在研究 Socket.io 文档，但仍然无法弄清楚为什么 io.sockets.on 不起作用。我试过使用io.on，但没有成功。

在客户端，我只是监听socket.on(ROUND_START/ROUND_END)的事件

这个客户端监听器正在工作，但是，服务器之一 - io.sockets.on(ROUND_START... - 没有。

服务器

/**
 * Handle  Game phases
 */
const NEXT_GAME_TIMEOUT = 5000;
const END_GAME_TIMEOUT = 10000;
const FULL_GAME_TIMEOUT = END_GAME_TIMEOUT + NEXT_GAME_TIMEOUT;
const ROUND_START = "ROUND_START";
const ROUND_END = "ROUND_END";

setInterval(() => {
  io.sockets.emit(ROUND_START);
}, FULL_GAME_TIMEOUT);

// Not working
io.sockets.on(ROUND_START, () => {
  console.log("ROUND STARTED")

  setTimeout(() => {
    io.sockets.emit(ROUND_END);
  }, END_GAME_TIMEOUT)
});

io.sockets.on(ROUND_END, () => {
  console.log("ROUND ENDED")

  setTimeout(() => {
    io.sockets.emit(ROUND_START);
  }, NEXT_GAME_TIMEOUT)
});

不从客户端发送与回合开始相关的任何内容的想法是因为回合必须跨套接字同步。

我做错了什么？

Answer 1

我通常在套接字连接到服务器时附加。我在https://socket.io/get-started/chat

得到了这个聊天示例

完整的服务器配置

var app = require('express')();
var http = require('http').Server(app);
var io = require('socket.io')(http);

app.get('/', function(req, res){
    res.sendFile(__dirname + '/index.html');
});

http.listen(3000, function(){
console.log('listening on *:3000');
});

const NEXT_GAME_TIMEOUT = 5000;
const END_GAME_TIMEOUT = 10000;
const FULL_GAME_TIMEOUT = END_GAME_TIMEOUT + NEXT_GAME_TIMEOUT;
const ROUND_START = "ROUND_START";
const ROUND_END = "ROUND_END";

io.on('connection', function(socket) {
    console.log("user connected!!!");
    socket.on(ROUND_START, () => {
        console.log("ROUND STARTED")

        setTimeout(() => {
        io.sockets.emit(ROUND_END);
        }, END_GAME_TIMEOUT)
    });

    socket.on(ROUND_END, () => {
        console.log("ROUND ENDED")

        setTimeout(() => {
        io.sockets.emit(ROUND_START);
        }, NEXT_GAME_TIMEOUT)
    });
})