1.安装express
在文件夹mypro路径下的cmd窗口运行“npm install express –save”
2.添加文件app.js到mypro文件夹
/app.js
var app = require('express')();
var http = require('http').Server(app);
app.get('/', function(req, res){
res.send('<h1>Hello world</h1>');
});
http.listen(3000, function(){
console.log('listening on *:3000');
});
运行node app.js,打开http://localhost:3000/，显示hello world
3.安装socket.io
在上面的CMD窗口运行：“npm install –save socket.io”
4.添加index.html到mypro文件夹
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</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>
<script src="/socket.io/socket.io.js"></script>
<script src="http://code.jquery.com/jquery-1.11.1.js"></script>
<script>
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>
</body>
</html>
5.修改app.js
/**
* Created by xl on 2017/2/21.
*/
var app = require('express')();
var http = require('http').Server(app);
var io = require('socket.io')(http);
app.get('/',function (req,res) {
res.sendfile('index.html');
});
io.on('connection', function(socket){
console.log('a user connected');
socket.on('chat message', function(msg){
console.log('message: ' + msg);
io.emit('chat message', msg);
});
});
app.set('port', process.env.PORT || 3000);
var server = http.listen(app.get('port'), function() {
console.log('start at port:' + server.address().port);
});
运行app.js,打开http://localhost:3000/,显示如下：
服务端如下所示：
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