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index.html
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<!DOCTYPE html>
<html dir="ltr" lang="zh" xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>websocket聊天室</title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<link rel="stylesheet" type="text/css" href="css/bootstrap.min.css">
</head>
<body>
<div class="container">
<p>在线人数<span id="userNum"></span></p>
<textarea id="message" rows="10"></textarea>
<div class="send">
<p><textarea id="input" placeholder="请输入要发送的内容"></textarea></p>
<p><button type="button" class="btn btn-primary" id="sub">发送</button></p>
</div>
</div>
<script type="text/javascript">
(function(){
var $ = function(id){return document.getElementById(id) || null;}
var wsServer = 'ws://127.0.0.1:8080';
var ws = new WebSocket(wsServer);
var isConnect = false;
ws.onopen = function (evt) { onOpen(evt) };
ws.onclose = function (evt) { onClose(evt) };
ws.onmessage = function (evt) { onMessage(evt) };
ws.onerror = function (evt) { onError(evt) };
function onOpen(evt) {
console.log("连接服务器成功");
isConnect = true;
}
function onClose(evt) {
//console.log("Disconnected");
}
function onMessage(evt) {
var data = JSON.parse(evt.data);
switch (data.type) {
case 'text':
addMsg(data.msg);
break;
case 'num' :
updataUserNum(data.msg);
break;
}
console.log('Retrieved data from server: ' + evt.data);
}
function onError(evt) {
//console.log('Error occured: ' + evt.data);
}
function sendMsg() {
if(isConnect){
ws.send($('input').value);
$('input').value = '';
}
}
function addMsg(msg) {
msg = JSON.parse(msg);
var text = '用户' + msg.user + '说:\n' + msg.text + '\n';
$('message').value += text;
$('message').scrollTop = $('message').scrollHeight;
}
function updataUserNum(msg) {
$('userNum').innerText = msg;
}
$('sub').addEventListener('click',sendMsg,false);
})();
</script>
</body>
</html>