1、新建package.json文件:
{
"name": "socket-chat-example",
"version": "0.0.1",
"description": "my first chat socket-chat-example",
"dependencies": {
"express": "^4.14.0",
"socket.io": "^1.4.8"
}
}
2、新建index.js用于聊天服务:
//使用express搭建web服务器
var express = require("express");
var app = express();
var http = require("http").Server(app);
//使用socket.io监听事件
var io = require("socket.io")(http);
//使用express发送css js等静态资源
app.use(express.static("public"));
//index.html
app.get("/",function(req,res){
res.sendFile(__dirname + "/index.html");
});
//socket.io监听事件
io.on("connection",function(socket){
console.log("a user connected");
socket.on("disconnect",function(){
console.log("a user disconnected");
});
//实时监听chat message事件
socket.on("chat message",function(msg){
io.emit("chat message",msg);
})
});
//服务器监听开启
http.listen(3000,function(){
console.log("listening on *:3000");
});
3、聊天页面index.html编写:
<!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>
<script src="https://cdn.socket.io/socket.io-1.4.5.js"></script>
<script src="http://libs.baidu.com/jquery/1.11.3/jquery.min.js"></script>
<script type="text/javascript">
var socket = io();
$('form').submit(function(){
//点击发送按钮,提交输入的信息
socket.emit('chat message', $('#m').val());
$('#m').val('');
return false;
});
socket.on('chat message', function(msg){
//将chat message显示在页面
$('#messages').append($('<li>').text(msg));
});
</script>
</body>
</html>
具体参考:http://socket.io/