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);