转nodejssocket.io初探

npm install socket.io

var app = require('http').createServer(handler), 
    io = require('socket.io').listen(app), 
    fs = require('fs')

app.listen(8080);
io.set('log level', 1);//将socket.io中的debug信息关闭

function handler (req, res) {
  fs.readFile(__dirname + '/index.html',function (err, data) {  
    if (err) {
      res.writeHead(500);
      return res.end('Error loading index.html');
    }    
    res.writeHead(200, {'Content-Type': 'text/html'});    
    res.end(data);
  });
}

io.sockets.on('connection', function (socket) {
    socket.emit('news', { hello: 'world' });
    socket.on('my other event', function (data) {
      console.log(data);
    });
});

node  server.js

var sockets = [];
var i = 1;
io.sockets.on('connection', function (socket) {
    sockets[i] = socket;
    i++;
    socket = sockets[1];  //这里指定向第一个客户发送消息
    console.log(i);
    
    socket.emit('news', { hello: 'world' });
    socket.on('my other event', function (data) {
      console.log(data);
    });
});