详解如何使用koa实现socket.io官网的例子

{
 "name": "socket-chat-example",
 "version": "0.0.1",
 "description": "my first socket.io app",
 "dependencies": {}
}

npm install --save koa koa-router http fs socket.io

var Koa = require('koa');
var app = new Koa();
const Router = require('koa-router');
const fs = require('fs');
const server = require('http').createServer(app.callback());
const io = require('socket.io')(server);

// 首页路由
let router = new Router();
router.get('/', ctx => {
  ctx.response.type = 'html';
  ctx.response.body = fs.createReadStream('./index.html');
});
app.use(router.routes());

// socket连接
io.on('connection', (socket) => {
  socket.on('chat message', (msg) => {
    console.log('message: '+msg);
    io.emit('chat message', msg);
  });
  socket.on('disconnect', () => {
    console.log('user disconnected');
  });
});

// 监听端口
server.listen(3000, () => {
  console.log('listening on *:3000');
});

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

const server = require('http').createServer(app.callback());
const io = require('socket.io')(server);

 
  
  
 
 
  

  
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