写了一个简单的demo，直接上代码吧。用的时候注意一下版本号，可能 socket.io 的 API 有修改~
效果图
index.html
<!DOCTYPE <!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<title>websocket测试</title>
<meta name="viewport" content="width=device-width, initial-scale=1">
<!-- <link rel="stylesheet" type="text/css" media="screen" href="main.css" /> -->
<script src="https://cdnjs.cloudflare.com/ajax/libs/socket.io/2.2.0/socket.io.dev.js"></script>
<style>
* {margin:0; padding:0;}
html {background-color:#fff; }
#footer {border:0 solid #c3c3c3; position: fixed; height: 40px; 98%; bottom:10px; left:1%; display:flex; flex:1; padgint:10px 0;}
.btn {background-color:#1AAD19; color:#fff; box-sizing:border-box; pading:0 1.32em; line-height:2.3; border-radius:5px; 100px; display:inline-block; font-size:13px; text-align:center; text-decoration:none;height:40px;line-height:40px;font-size:16px;1}
.ipt {border:0; outline:0; background-color:transparent; font-size:17px; height:1.47em; line-height:1.47; 100%; height:100%;}
.ipt_container {display:flex; flex:1; border-top:1px solid #e5e5e5; border-bottom:1px solid #e5e5e5;}
.btn_container {ymargin:0 10px;}
#main {98%; height: 90%; margin:10px auto; display:block;}
#main textarea {border:1px solid #ddd; 100%; height:100%; padding:5px; line-height:22px; font-size:14px;}
/* .ipt_container:before {content:" "; position:absolute; top:0; left:0; height:1px; border-top:1px solid #e5e5e5; color:#e5e5e5;transform:scaleY(0.5); z-index:2; transform-origin:0 0;}
.ipt_container:after {content:" "; position:absolute; bottom:0; right:0; height:1px; border-bottom:1px solid #e5e5e5; color:#e5e5e5;transform:scaleY(0.5); z-index:2; transform-origin:0 100%;} */
</style>
</head>
<body>
<div id="wrapper">
<div id="main">
<textarea readonly="readonly" id="txtConsole"></textarea>
</div>
<div id="footer">
<div class="ipt_container">
<input type='text' class="ipt" placeholder="请输入内容..." id="chatpIpt"/>
</div>
<div class="btn_container">
<a href="javascript:;" class="btn" onclick="sendMsgHandler();return false;">发送</a>
</div>
</div>
</div>
<script type="text/javascript">
// common function
function getEl(id) {
return typeof(id) === 'string' ? document.getElementById(id) : null;
}
// native code
// var websocket = new WebSocket('ws://127.0.0.1:8080/');
// websocket.addEventListener('error', function (evt) {
// console.log('websocket error.')
// });
// websocket.addEventListener('open', function (evt) {
// console.log('websocket open.')
// });
// websocket.addEventListener('message', function (evt) {
// console.log(evt.data);
// });
// websocket.addEventListener('close', function (evt) {
// console.log('websocket close.')
// })
// Create SocketIO instance, connect
var socket = io.connect('ws://localhost:8080');
// Add a connect listener
socket.on('connect', function() {
showMessage('Client has connected to the server!');
});
// Add a connect listener
socket.on('news', function(data) {
var str = 'Received data from server. data : ' + JSON.stringify(data);
showMessage(str);
});
// Add a disconnect listener
socket.on('disconnect', function() {
showMessage('The client has disconnected');
});
// Sends a message to the server via sockets
function sendMessageToServer(msgData) {
socket.emit('test_event', msgData);
}
var delayScrollTimer = null;
function showMessage(str) {
var txt = getEl('txtConsole')
txt.value = txt.value + '
' + str;
if (delayScrollTimer) {
clearTimeout(delayScrollTimer);
delayTimer = null;
}
delayScrollTimer = setTimeout(function() {
txt.scrollTop = txt.scrollHeight;
}, 10);
}
// test
function sendMsgHandler() {
var elem = getEl('chatpIpt');
var iptValue = elem.value;
sendMessageToServer({data : iptValue});
elem.value = "";
elem.focus();
}
</script>
</body>
</html>socket_server.js
var app = require('http').createServer(handler) var io = require('socket.io')(app); var fs = require('fs'); app.listen(8080); function handler(req, res) { res.writeHead(200, { 'Content-Type': 'text/html' }); res.end('<h1>Hello Socket Lover!</h1>'); } io.on('connection', function (socket) { socket.emit('news', { data : 'server world' }); socket.on('test_event', function (data) { console.log('receive data from client. data : ' + JSON.stringify(data)); var str = data.data + "(from server by " + new Date().getTime() + ")"; socket.emit('news', { data : str}); }); socket.on('disconnect', function () { console.log('websocket close. -- server log'); }); // var num = 1; // setInterval(function xx(params) { // socket.emit('news', { num: num++}); // }, 1 * 1000); });