NodeJS聊天室

淩亂°似流年 2022-05-17 12:16 221阅读 0赞

跟着教学视频了解到websocket和socket.io的通信方法之后，自己写了一个交互效果更好的聊天室。

▍小插曲

2019.1.24：今天在聊天室后台无意间看到了这样一段聊天，希望这位名叫luke所说的是假的，如果是真的，请相信，这世界上还有更好的人在等着你。

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2lfZG9udF9rbm93X2E_size_16_color_FFFFFF_t_70][]

▍演示效果

![70][]

▍实现过程（Windows系统）

1、在nodeJS中文网下载nodeJS客户端并安装；

2、在桌面（未知可自选）创建一个项目文件夹用于存放相关文件；

3、打开新建的文件夹，创建chatRoom.html文件和server.js文件；

4、打开命令行窗口，找到这个文件夹后，输入【npm i socket.io】，此时将在该文件夹中生成了一个新的文件夹，这是刚刚下载的socket.io相关依赖包；

5、将代码补充到chatRoom.html文件和server.js文件中；

6、打开命令行窗口，找到该项目文件夹后，输入【node server.js】并【Enter】。

7、保持窗口在运行状态，不要关闭！！！

▍有待完善的地方

1、没有实现动态的分配身份；

2、界面可再优化；

3、前台向后台发送中文姓名时会出现乱码（找了两天资料都没有搞定，跪求大佬指教）。

▍server.js

// 引入http标准模块,CommonJS模块
    const http = require("http");
    const fs = require("fs");
    const ws = require("socket.io");
    // 当前在线人数
    let count = 0;
    // 总访客人数
    let totalCount = 0;
    
    // 创建一个web服务器
    const server = http.createServer(function(request, response) {
    	response.writeHead(200, {
    		"Content-Type": "text/html;charset=UTF-8"
    	});
    	// 可发送文本
    	// response.end("hello world");
    
    	// 可自动解析html
    	// response.end("<h1>我是标题2</h1>");
    
    	// 读取文件
    	const html = fs.readFileSync("index.html");
    	response.end(html);
    
    });
    
    // 基于当前web服务器开启socket实例
    const io = ws(server);
    
    // 检测连接事件
    io.on("connection", function(socket) {
    
    	// console.log("当前有用户连接");
    	count++;
    	totalCount++;
    	// console.log("count:" + count);
    
    	let name = '';
    
    	// 给公众发送上线信息
    	//	socket.broadcast.emit("connection", {
    	//		count: count,
    	//		id: count
    	//	});
    
    	// 给自己发送上线信息
    	//	socket.emit("connection", {
    	//		count: count,
    	//		id: totalCount
    	//	});
    
    	// 加入群聊
    	socket.on("join", function(message) {
    		console.log(message);
    		name = message.name;
    		// console.log(name + "加入了群聊");
    		socket.broadcast.emit("joinNoticeOther", {
    			name: name,
    			action: "加入了群聊",
    			count: count
    		});
    		socket.emit("joinNoticeSelf", {
    			count: count,
    			id: totalCount
    		});
    	});
    
    	// 接收客户端所发送的信息
    	socket.on("message", function(message) {
    		console.log(message);
    		// 向所有客户端广播发布的消息
    		io.emit("message", message);
    	});
    
    	//	 监听到连接断开
    	socket.on("disconnect", function() {
    		count--;
    		// console.log(name + "离开了群聊")
    		io.emit("disconnection", {
    			count: count,
    			name: name
    		});
    	});
    
    });
    
    // 服务器监听端口
    server.listen(3000);
    console.log('Server has started.\n')

▍chatRoom.html

<!DOCTYPE html>
    <html>
    
    <head>
    	<meta charset="UTF-8">
    	<title>蜗牛先生的聊天室</title>
    	<style>
    		* {
    			margin: 0;
    			padding: 0;
    		}
    
    		html {
    			display: flex;
    			justify-content: center;
    			align-items: center;
    			width: 100%;
    			height: 100%;
    			overflow: hidden;
    			background-color: #d4f0fc;
    			background-image: url(http://tool.uixsj.cn/qchan/uploads/2018/08/traffic_a_lot_of_cars_driving_across_the_golden_gate_bridge_free_stock_photos_picjumbo_HNCK2899_2210x1474.jpg);
    			background-size: 100% 100%;
    		}
    
    		.chatroom {
    			display: flex;
    			width: 1000px;
    			height: 700px;
    			border-radius: 20px;
    			overflow: hidden;
    		}
    
    		.left {
    			position: relative;
    			display: flex;
    			flex-direction: column;
    			align-content: center;
    			width: 30%;
    			height: 100%;
    			background-color: #478291;
    		}
    
    		.icon-container {
    			display: flex;
    			justify-content: center;
    			align-items: center;
    			margin-top: 40px;
    			height: 30%;
    		}
    
    		.icon-container img {
    			border: 10px solid #333;
    			width: 150px;
    			height: 150px;
    			object-fit: cover;
    			border-radius: 50%;
    		}
    
    		.icon-container img:hover {
    			animation: rotate 2s linear infinite forwards;
    		}
    
    		@keyframes rotate {
    			from {
    				transform: rotate(0);
    			}
    
    			to {
    				transform: rotate(360deg);
    			}
    		}
    
    		.self-container {
    			display: flex;
    			justify-content: center;
    			align-items: center;
    			height: 15%;
    			line-height: 60px;
    			font-size: 25px;
    			font-weight: 700;
    			color: #cadeea;
    		}
    
    		.function-container {
    			display: flex;
    			justify-content: flex-start;
    			align-items: flex-start;
    			flex-wrap: wrap;
    			padding: 0 30px;
    			color: #617c8f;
    		}
    
    		.function-item {
    			margin: 5px;
    			border: 3px solid #333;
    			padding: 5px 10px;
    			background: #fff;
    			font-size: 14px;
    		}
    
    		.note-help {
    			position: absolute;
    			bottom: 20px;
    			padding: 0 30px;
    			font-size: 12px;
    			color: #9cadad;
    			text-align: center;
    		}
    
    		.right {
    			width: 70%;
    			height: 100%;
    			background-color: #eee;
    		}
    
    		.head {
    			display: flex;
    			justify-content: center;
    			align-items: center;
    			height: 10%;
    			width: 100%;
    			background-color: white;
    			font-size: 22px;
    			font-weight: bold;
    		}
    
    		.chat-container {
    			height: 80%;
    			overflow-y: scroll;
    			box-sizing: border-box;
    		}
    
    		.speaker-name {
    			padding: 5px 0;
    			font-size: 12px;
    			color: #888888;
    		}
    
    		.message-self,
    		.message-other {
    			display: flex;
    			flex-direction: row;
    			flex-wrap: nowrap;
    			padding: 10px;
    			width: 100%;
    			box-sizing: border-box;
    		}
    
    		.message-self {
    			justify-content: flex-end;
    		}
    
    		.message-container {
    			display: flex;
    			flex-direction: row;
    			max-width: 80%;
    		}
    
    		.message-self .message-content {
    			padding-right: 10px;
    		}
    
    		.message-other .message-content {
    			padding-left: 10px;
    		}
    
    		.message-self .message {
    			background-color: blue;
    			color: white;
    		}
    
    		.message-other .message {
    			background-color: white;
    			color: black;
    		}
    
    		.message-self .speaker-name {
    			text-align: right;
    		}
    
    		.message-other .speaker-name {
    			text-align: left;
    		}
    
    		.message {
    			border-radius: 10px;
    			padding: 10px;
    		}
    
    		.message-container .icon img {
    			width: 40px;
    			height: 40px;
    			object-fit: cover;
    			border-radius: 50%;
    		}
    
    		.message-table {
    			border-collapse: collapse;
    			border: 2px dashed #aaa;
    		}
    
    		.message-table-th {
    			border-bottom: 2px dashed #aaa;
    			padding: 5px 10px;
    		}
    
    		.message-table-td {
    			padding: 5px 10px;
    		}
    
    		.notify-container {
    			display: flex;
    			justify-content: center;
    			align-items: center;
    			width: 100%;
    			height: 50px;
    		}
    
    		.notify {
    			border-radius: 10px;
    			padding: 5px 10px;
    			background-color: #ddd;
    			opacity: 0.9;
    			font-size: 12px;
    			color: white;
    		}
    
    		.notify-name {
    			color: blue;
    		}
    
    		.input-container {
    			display: flex;
    			flex-direction: row;
    			justify-content: space-between;
    			width: 100%;
    			height: 10%;
    			background-color: blue;
    			font-size: 18px;
    		}
    
    		.input-content {
    			position: relative;
    			width: 85%;
    			background-color: white;
    		}
    
    		.input-content input {
    			border: 0;
    			padding: 10px;
    			width: 100%;
    			height: 100%;
    			box-sizing: border-box;
    			/* 去除input框外边框  */
    			outline: none;
    			font-size: 18px;
    		}
    
    		.input-content .num {
    			position: absolute;
    			right: 0;
    			top: 0;
    			display: flex;
    			justify-content: center;
    			align-items: center;
    			width: 70px;
    			height: 100%;
    			background: -webkit-linear-gradient(left, rgba(255, 255, 255, 0.6), rgba(255, 255, 255, 1));
    			font-weight: bold;
    			color: #333333;
    		}
    
    		.input-content input::-webkit-input-placeholder {
    			font-size: 18px;
    		}
    
    		.input-container .send {
    			display: flex;
    			justify-content: center;
    			align-items: center;
    			width: 15%;
    			background-color: orange;
    			font-weight: bold;
    		}
    	</style>
    </head>
    
    <body>
    
    	<div class="chatroom">
    
    		
    		<div class="left">
    			
    			<div class="icon-container">
    				<img src="https://i.niupic.com/images/2018/08/10/5yxS.jpg" />
    			</div>
    
    			
    			<div class="self-container">姓名</div>
    
    			
    			<div class="function-container">
    				<div class="function-item">尬聊模式</div>
    				<div class="function-item">“讲个笑话”</div>
    				<div class="function-item">“歇后语”</div>
    				<div class="function-item">“顺口溜”</div>
    				<div class="function-item">“北京天气”</div>
    				<div class="function-item">“名人名言”</div>
    				<div class="function-item">“静夜思”</div>
    			</div>
    
    			<div class="note-help">
    				如果您有什么好的页面设计方案，请将您的设计稿发送至 tanabalu@qq.com ，非常感谢！
    			</div>
    		</div>
    
    		
    		<div class="right">
    			
    			<div class="head">聊天室(<span id="count">0</span>)</div>
    
    			
    			<div class="chat-container">
    				<div class="message-other">
    					<div class="message-container">
    						<div class="icon">
    							<img src="http://file06.16sucai.com/2016/0921/2b04bfeb965677fe8c2d5a4dbd292478.jpg" />
    						</div>
    						<div class="message-content">
    							<div class="speaker-name">机器人</div>
    							<div class="message">你好呀，小主人，欢迎来到TAchat。</div>
    						</div>
    					</div>
    				</div>
    				<div class="message-other">
    					<div class="message-container">
    						<div class="icon">
    							<img src="http://file06.16sucai.com/2016/0921/2b04bfeb965677fe8c2d5a4dbd292478.jpg" />
    						</div>
    						<div class="message-content">
    							<div class="speaker-name">机器人</div>
    							<div class="message">
    								<table class="message-table">
    									<tr>
    										<th class="message-table-th">您可尝试输入以下指令：</th>
    									</tr>
    									<tr>
    										<td class="message-table-td">1、讲个笑话</td>
    									</tr>
    									<tr>
    										<td class="message-table-td">2、歇后语</td>
    									</tr>
    									<tr>
    										<td class="message-table-td">3、顺口溜</td>
    									</tr>
    									<tr>
    										<td class="message-table-td">4、xx天气</td>
    									</tr>
    									<tr>
    										<td class="message-table-td">5、名人名言</td>
    									</tr>
    									<tr>
    										<td class="message-table-td">6、诗词</td>
    									</tr>
    									<tr>
    										<td class="message-table-td">……</td>
    									</tr>
    								</table>
    							</div>
    						</div>
    					</div>
    				</div>
    				<div class="message-other">
    					<div class="message-container">
    						<div class="icon">
    							<img src="http://file06.16sucai.com/2016/0921/2b04bfeb965677fe8c2d5a4dbd292478.jpg" />
    						</div>
    						<div class="message-content">
    							<div class="speaker-name">机器人</div>
    							<div class="message">还可以邀请小伙伴打开本网址与您一起聊天呢！</div>
    						</div>
    					</div>
    				</div>
    			</div>
    
    			
    			<div class="input-container">
    				<div class="input-content">
    					<input id="msg" autofocus="autofocus" value="" oninput="inputMessage()" placeholder="请输入聊天内容…" />
    					<div class="num">0/30</div>
    				</div>
    				<div class="send" onclick="send()">发送</div>
    			</div>
    		</div>
    
    	</div>
    
    	<script src="https://cdn.bootcss.com/jquery/3.2.1/jquery.min.js"></script>
    	<script src="https://cdn.bootcss.com/socket.io/2.3.0/socket.io.dev.js"></script>
    	
    	<script>
    		// 建立连接
    		const socket = io.connect("/");
    
    		// 编号
    		let id = 0;
    
    		// 允许输入的最大字数
    		const maxInput = 30;
    
    		// 用户头像
    		const userIcon = 'https://i.niupic.com/images/2018/08/10/5yxS.jpg';
    
    		// 机器人头像
    		const robotIcon = 'http://file06.16sucai.com/2016/0921/2b04bfeb965677fe8c2d5a4dbd292478.jpg';
    
    		// 用户姓名
    		let name = '';
    
    		getName();
    
    		// 如果监听到socket消息，那么执行该回调函数，并得到广播消息
    		// 此处的message参数是后台广播的内容
    		socket.on("message", function (message) {
    			console.log(message)
    			let html = '';
    			if (name === message.name) {
    				html =
    					'<div class="message-self"><div class="message-container"><div class="message-content"><div class="speaker-name">' +
    					message.name + '</div><div class="message">' + message.msg +
    					'</div></div><div class="icon"><img src="' + userIcon + '" /></div></div></div>';
    			} else {
    				html = '<div class="message-other"><div class="message-container"><div class="icon"><img src="' +
    					userIcon + '" /></div><div class="message-content"><div class="speaker-name">' + message.name +
    					'</div><div class="message">' + message.msg + '</div></div></div></div>';
    			}
    			$(".chat-container").append(html);
    			scrollToBottom();
    		});
    
    		// 接收到系统通知
    		socket.on("joinNoticeSelf", function (message) {
    			$("#count").text(message.count);
    			id = message.id;
    			$(".id").text(message.id + '号');
    		});
    
    		// 接收到系统通知
    		socket.on("joinNoticeOther", function (message) {
    			console.log("joinNoticeOther：");
    			console.log(message);
    			$("#count").text(message.count);
    			const msg = {
    				name: message.name,
    				action: message.action
    			}
    			notify(msg);
    		});
    
    		// 断开连接回调事件
    		socket.on("disconnection", function (message) {
    			console.log(message);
    			$("#count").text(message.count);
    			const notifyMessage = {
    				name: message.name,
    				action: "退出了群聊"
    			};
    			notify(notifyMessage);
    		});
    
    		document.onkeydown = function (event) {
    			var e = event || window.event || arguments.callee.caller.arguments[0];
    			if (e && e.keyCode === 13) { // enter 键
    				send();
    			}
    		};
    
    		/**
    		 * 发送系统通知
    		 * 
    		 * @param {Object} message
    		 */
    		function notify(message) {
    			if (message.name && message.action) {
    				const notify = '<div class="notify-container"><div class="notify"><span class="notify-name">' + message.name +
    					'</span>' + message.action + '</div></div>';
    				$(".chat-container").append(notify);
    				scrollToBottom();
    			}
    		}
    
    		/**
    		 * 固定滚动条到底部
    		 */
    		function scrollToBottom() {
    			$(".chat-container").scrollTop($(".chat-container")[0].scrollHeight);
    		}
    
    		/**
    		 * 获取姓名
    		 */
    		function getName() {
    			const str = prompt("请输入你的聊天昵称", "");
    			if (str) {
    				name = str;
    				console.log(name)
    				$(".self-container").text(str);
    				const message = {
    					name: name
    				}
    				socket.emit("join", message);
    			} else {
    				getName();
    			}
    		}
    
    		/**
    		 * 输入消息
    		 */
    		function inputMessage() {
    			const msg = $("#msg").val();
    			const length = $("#msg").val().length;
    			if (length > maxInput) {
    				$("#msg").val(msg.substr(0, maxInput));
    				$(".num").text(maxInput + '/' + maxInput);
    			} else {
    				const text = length + '/' + maxInput;
    				$(".num").text(text);
    			}
    		}
    
    		/**
    		 * 获取回复
    		 */
    		function getReply(msg) {
    			$.ajax({
    				url: "http://api.tianapi.com/txapi/robot/",
    				data: {
    					key: '762be789103e1ae7b65573f8d4fc0df6',
    					question: msg,
    				},
    				success: function (res) {
    					if (res.code === 200) {
    						const newslist = res.newslist;
    						for (let i = 0; i < newslist.length; i++) {
    							const html =
    								'<div class="message-other"><div class="message-container"><div class="icon"><img src="' +
    								robotIcon +
    								'" /></div><div class="message-content"><div class="speaker-name">机器人</div><div class="message">' +
    								newslist[i].reply + '</div></div></div></div>';
    							$(".chat-container").append(html);
    						}
    						scrollToBottom();
    					}
    				}
    			});
    		}
    
    		/**
    		 * 发送消息
    		 */
    		function send() {
    			var msg = $("#msg").val();
    			if (!name) {
    				getName();
    			} else if (msg) {
    				const message = {
    					id,
    					name,
    					msg,
    				};
    				// 通过socket发送消息
    				socket.send(message);
    				getReply(msg);
    				$("#msg").val("");
    				$(".num").text('0/' + maxInput);
    			}
    		}
    	</script>
    
    </body>
    
    </html>

![关注公众号：爱唱歌的蜗牛先生][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2lfZG9udF9rbm93X2E_size_16_color_FFFFFF_t_70 1]

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