1. 程式人生 > >socket.io學習之旅----小例子

socket.io學習之旅----小例子

{
  "name": "client",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "keywords": [],
  "author": "",
  "license": "ISC",
  "dependencies": {
    "express": "^4.15.2",
    "socket.io": "^2.1.1"
  }
}
var app = require('express')();
var http = require('http').Server(app);
var io = require('socket.io')(http);
// app.get('/', function(req, res){
//   res.send('<h1>Hello world</h1>');
// });
app.get('/', function(req, res){
  res.sendFile(__dirname + '/index.html');
})
io.on('connection', function(socket){
  console.log('a user connected');
  socket.on('disconnect', function(){
    console.log('user disconnected');
  });
  // socket.on('chat message', function(msg){
  //   console.log('message: ' + msg);
  // });
  // socket.broadcast.emit('hi');
  socket.on('chat message', function(msg){
  	console.log('message: ' + msg);
    io.emit('chat message', msg);
  });
});
http.listen(3000, function(){
  console.log('listening on *:3000');
})
<!doctype html>
<html>
  <head>
    <title>Socket.IO chat</title>
    <style>
      * { margin: 0; padding: 0; box-sizing: border-box; }
      body { font: 13px Helvetica, Arial; }
      form { background: #000; padding: 3px; position: fixed; bottom: 0; width: 100%; }
      form input { border: 0; padding: 10px; width: 90%; margin-right: .5%; }
      form button { width: 9%; background: rgb(130, 224, 255); border: none; padding: 10px; }
      #messages { list-style-type: none; margin: 0; padding: 0; }
      #messages li { padding: 5px 10px; }
      #messages li:nth-child(odd) { background: #eee; }
    </style>
  </head>
  <body>
    <ul id="messages"></ul>
    <form action="">
      <input id="m" autocomplete="off" /><button>Send</button>
    </form>
  </body>
  <script src="/socket.io/socket.io.js"></script>
  <script src="https://code.jquery.com/jquery-1.11.1.js"></script>
<script>
  $(function () {
    var socket = io();
    $('form').submit(function(){
      socket.emit('chat message', $('#m').val());
      $('#m').val('');
      return false;
    });
    socket.on('chat message', function(msg){
      $('#messages').append($('<li>').text(msg));
    });
  });
</script>
</html>