node.js ws模块搭建websocket服务端的方法示例

npm install ws

var express = require('express');
var http = require('http');
var WebSocket = require('ws');
var app = express();
var server = http.createServer(app);
var wss = new WebSocket.Server({server});

wss.on('connection', function connection(ws) {
 console.log('连接成功！')
 ws.on('message', function incoming(data) {
 wss.clients.forEach(function each(client) {
 client.send('do you love me?');
 });
 });
});

server.listen(3000, function listening() {
 console.log('服务器启动成功！');
}); 

var socket = `ws://localhost:3000`;
var websocket = new WebSocket(socket);