var http=require('http')
var sio=require('socket.io')
var server=http.createServer((req,res)=>{
 res.writeHead(200,{'Content-type':'text/html'})
 res.end(fs.readFileSync('./snak.html'))
}).listen(8088)//创thhp建服务器
var socket=sio.listen(server)//监听http服务器
socket.on('connection',(socket)=>{//建立连接后的回调函数
})//这里的socket参数，是服务器端用于与客户端建立连接的scoket端口对象

 <script src='/socket.io/socket.io.js'></script>
//js
var socket=io.connect()

socket.send('收到信息')

socket.on('message',(val)={ console.log(val) })

socket.emit('news',data,(val1,val2...)=>{})

socket.on('news',(val)={ console.log(val) })

//服务器端
var io = require('socket.io').listen(server);
io.sockets.on('connection', (socket) => {
io.sockets.emit('login',name);
//socket.broadcast.emit('login',name)
})

//客户端
var socket=io.connect()
socket.emit('login',name)

npm install vue-socket.io
npm install socket.io-client

import VueSocketio from 'vue-socket.io';
import socketio from 'socket.io-client';
Vue.use(VueSocketio,socketio('http://localhost:8888/'));//与服务端链接

export default {
 name: "NetList",
 sockets: {
 //不能改,j建立连接自动调用connect
 connect: function() {
  //与socket.io连接后回调
  console.log("socket connected");
 },
//服务端向客户端发送login事件
 login: function(value) {
  //监听login(后端向前端emit login的回调)
console.log(value)
 }
 },
updated(){
//数据更新时，向服务器端发送事件
this.$socket.emit("compile"); //触发start
}

var http = require('http');
var fs = require('fs');
var exec = require('child_process').exec;
var server = http.createServer(function (req, res) {
 // console.log(req)
 // console.log(res)
 // fs.readFile('./index.html',function(error,data){//若根目录有index.html，访问地址，将显示index.html
 //  res.writeHead(200,{'Content-Type':'text/html'});
 //  res.end(data,'utf-8');
 // });
}).listen(8888);//创建http服务
console.log('Server running ');
var io = require('socket.io').listen(server);
io.sockets.on('connection', (socket) => {
 console.log('链接成功');
 socket.on('compile', () => {
 socket.emit('login', 'ok');
 }); 
});