代码
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<!DOCTYPE html>
<html>
<head>
<title></title>
<meta http-equiv="content-type" content="text/html;charset=utf-8">
<style>
p {
text-align: left;
padding-left: 20px;
}
</style>
</head>
<body>
<div style="width: 700px;height: 500px;margin: 30px auto;text-align: center">
<h1>聊天室实战</h1>
<div style="width: 700px;border: 1px solid gray;height: 300px;">
<div style="width: 200px;height: 300px;float: left;text-align: left;">
<p><span>当前在线:</span><span id="user_num">0</span></p>
<div id="user_list" style="overflow: auto;">
</div>
</div>
<div id="msg_list" style="width: 598px;border: 1px solid gray; height: 300px;overflow: scroll;float: left;">
</div>
</div>
<br>
<textarea id="msg_box" rows="6" cols="50" onkeydown="confirm(event)"></textarea><br>
<input type="button" value="发送" onclick="send()">
</div>
</body>
</html>
<script type="text/javascript">
var uname = window.prompt('请输入用户名', 'user' + uuid(8, 16));
var ws = new WebSocket("ws://127.0.0.1:8081");
ws.onopen = function () {
var data = "系统消息：连接成功";
listMsg(data);
};
ws.onmessage = function (e) {
var msg = JSON.parse(e.data);
var data = msg.content;
listMsg(data);
};
ws.onerror = function () {
var data = "系统消息 : 出错了,请退出重试.";
listMsg(data);
};
function confirm(event) {
var key_num = event.keyCode;
if (13 == key_num) {
send();
} else {
return false;
}
}
/**
* 发送并清空消息输入框内的消息
*/
function send() {
var msg_box = document.getElementById("msg_box");
var content = msg_box.value;
var reg = new RegExp("\r\n", "g");
content = content.replace(reg, "");
var msg = {'content': content.trim(), 'type': 'user'};
sendMsg(msg);
msg_box.value = '';
}
/**
* 将消息内容添加到输出框中,并将滚动条滚动到最下方
*/
function listMsg(data) {
var msg_list = document.getElementById("msg_list");
var msg = document.createElement("p");
msg.innerHTML = data;
msg_list.appendChild(msg);
msg_list.scrollTop = msg_list.scrollHeight;
}
/**
* 将数据转为json并发送
* @param msg
*/
function sendMsg(msg) {
var data = JSON.stringify(msg);
ws.send(data);
}
</script>
运行结果