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client.html
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client.html
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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: 800px;height: 600px;margin: 30px auto;text-align: center">
<h1>websocket聊天室</h1>
<div style="width: 800px;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>
<div><a href='#' onclick='loginout()'>退出聊天室</a></div>
</body>
</html>
<script type="text/javascript">
// 存储用户名到全局变量,握手成功后发送给服务器
var uname = prompt('请输入用户名', 'user' + uuid(8, 16));
var ws = new WebSocket("ws://192.168.10.2:8080");
ws.onopen = function () {
var data = "系统消息：建立连接成功";
listMsg(data);
};
/**
* 分析服务器返回信息
*
* msg.type : user 普通信息;system 系统信息;handshake 握手信息;login 登陆信息; logout 退出信息;
* msg.from : 消息来源
* msg.content: 消息内容
*/
ws.onmessage = function (e) {
var msg = JSON.parse(e.data);
var sender, user_name, name_list, change_type;
switch (msg.type) {
case 'system':
sender = '系统消息: ';
break;
case 'user':
sender = msg.from + ': ';
break;
case 'handshake':
var user_info = {'type': 'login', 'content': uname};
sendMsg(user_info);
return;
case 'login':
case 'logout':
user_name = msg.content;
name_list = msg.user_list;
change_type = msg.type;
dealUser(user_name, change_type, name_list);
return;
}
var data = sender + msg.content;
listMsg(data);
};
ws.onerror = function () {
var data = "系统消息 : 出错了,请退出重试.";
listMsg(data);
};
/**
* 在输入框内按下回车键时发送消息
*
* @param event
*
* @returns {boolean}
*/
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 = '';
// todo 清除换行符
}
/**
* 退出聊天室
*
*/
function loginout(){
var loginout_info = {'type': 'logout', 'content': '哈哈哈哈我退出聊天室了'};
sendMsg(loginout_info);
}
/**
* 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;
}
/**
* 处理用户登陆消息
*
* @param user_name 用户名
* @param type login/logout
* @param name_list 用户列表
*/
function dealUser(user_name, type, name_list) {
var user_list = document.getElementById("user_list");
var user_num = document.getElementById("user_num");
while(user_list.hasChildNodes()) {
user_list.removeChild(user_list.firstChild);
}
for (var index in name_list) {
var user = document.createElement("p");
user.innerHTML = name_list[index];
user_list.appendChild(user);
}
user_num.innerHTML = name_list.length;
user_list.scrollTop = user_list.scrollHeight;
var change = type == 'login' ? '上线' : '下线';
var data = '系统消息: ' + user_name + ' 已' + change;
listMsg(data);
}
/**
* 将数据转为json并发送
* @param msg
*/
function sendMsg(msg) {
var data = JSON.stringify(msg);
ws.send(data);
}
/**
* 生产一个全局唯一ID作为用户名的默认值;
*
* @param len
* @param radix
* @returns {string}
*/
function uuid(len, radix) {
var chars = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz'.split('');
var uuid = [], i;
radix = radix || chars.length;
if (len) {
for (i = 0; i < len; i++) uuid[i] = chars[0 | Math.random() * radix];
} else {
var r;
uuid[8] = uuid[13] = uuid[18] = uuid[23] = '-';
uuid[14] = '4';
for (i = 0; i < 36; i++) {
if (!uuid[i]) {
r = 0 | Math.random() * 16;
uuid[i] = chars[(i == 19) ? (r & 0x3) | 0x8 : r];
}
}
}
return uuid.join('');
}
</script>