如何创建WebSocket连接？

Question

对不起，我的英语=（

我学习了WebSocket，但不知道如何创建连接。

我使用Laravel + Redis + Socket.io（仅服务器）

在服务器server.js上

WebSocketServer = require('ws');
let webSocketServer = new WebSocketServer.Server({
    port: 3000
});
let io = require('socket.io')(webSocketServer);
let Redis = require('ioredis');

let redis = new Redis();

redis.psubscribe('channel_*');
redis.on('pmessage', function (pattern, channel, message) {
    console.log('Message recieved: ' + message); // work
    console.log('Channel: ' + channel); // work
    msg = JSON.parse(message);
    io.emit(channel + ':' + msg.event, msg.data.result); // don't work
});

在客户端上

        let socket = new WebSocket("ws://127.0.0.1:3000");

        socket.onopen = function() {
            console.log("Connect ok."); // work
        };

        socket.onclose = function(event) {
            if (event.wasClean) {
                console.log('Connect close');
            } else {
                console.log('Connect close 2');
            }
            console.log('Code: ' + event.code + ' reason: ' + event.reason);
        };

        socket.onmessage = function(event) {
            console.log("Get data " + event.data); // don't work
        };

        socket.onerror = function(error) {
            console.log("Error ", error);
        };

但是io.emit（...）无效。

我不想使用库window.io = require（'socket.io-client'）;

谢谢！