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Node.js怎么实现在线实时多人聊天室

2023-07-04 16:09

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本篇内容介绍了“Node.js怎么实现在线实时多人聊天室”的有关知识,在实际案例的操作过程中,不少人都会遇到这样的困境,接下来就让小编带领大家学习一下如何处理这些情况吧!希望大家仔细阅读,能够学有所成!

文件结构如下:

Node.js怎么实现在线实时多人聊天室

前端部分:

登录页面Login部分:

login.html

<!DOCTYPE html>  <html> <head>      <meta charset="UTF-8">      <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no">      <meta http-equiv="X-UA-Compatible" content="ie=edge">      <title>login</title>      <link rel="stylesheet" href="css/login.css" >  </head> <body>      <div class="login-box flex-box">          <!--登录栏-->          <h2 class="sign-title box-width">LOGIN</h2>          <!--头像栏-->          <div>              <div class="arrow left-arrow">                  <div></div>              </div>              <img class="p1 img-setting" src="./img/1.jpg" alt="1.jpg">              <img class="p2 img-setting" src="./img/2.jpg" alt="2.jpg">              <img class="p3 img-setting" src="./img/3.jpg" alt="3.jpg">              <img class="p2 img-setting" src="./img/4.jpg" alt="4.jpg">              <img class="p1 img-setting" src="./img/5.jpg" alt="5.jpg">              <div class="arrow right-arrow">                  <div></div>              </div>          </div>          <!--用户名栏-->          <div class="name-box box-width">              <input type="text" class="user-name box-width" placeholder="Please Type Your Name">          </div>          <!--确认栏-->          <div class="button-box box-width">              <input type="button" class="login-button box-width" value="Login The Chatroom">          </div>          <!--错误信息栏-->          <div class="error-box box-width">              <span>Welcome to chatroom!</span>          </div>      </div>  </body>  <script src="js/login.js"></script> </html>

login.css

* {      padding: 0;      margin: 0;      font-family: "Microsoft Yahei";  } html,  body {      width: 100%;      height: 100%;      font-family: "Microsoft Yahei";      display: flex;      justify-content: center;      align-items: center;  } body {      background: linear-gradient(-135deg, #51D15B, #42A855);      background: -moz-linear-gradient(-135deg, #51D15B, #42A855);      background: -webkit-linear-gradient(-135deg, #51D15B, #42A855);      background: -o-linear-gradient(-135deg, #51D15B, #42A855);  } .flex-box {      display: flex;      justify-content: center;      align-items: center;  } .box-width {      width: 80%;  }  .login-box {      width: 20%;      min-width: 304px;      max-width: 404px;      height: 50%;      min-height: 368px;      max-height: 468px;      flex-direction: column;      box-shadow: 1px 1px 15px #7B8C99;      background: #fff;  }  .sign-title {      color: #42A855;      border: 2px solid #42A855;      border-top: transparent;      border-left: transparent;      border-right: transparent;  }  .picture-carousel {      position: relative;      display: flex;      margin: 10%;  }  .arrow {      z-index: 3;      position: absolute;      font-size: 60px;      height: 100%;      width: 30%;      display: flex;      justify-content: center;      align-items: center;      color: #ffffff;  } .arrow:hover {      cursor: pointer;  } .left-arrow {      left: 0;  } .before-arrow {      width: 0px;      height: 0px;      border-width: 30px;      border-style: solid;      border-color: transparent #51D15B transparent transparent;  } .right-arrow {      right: 0;  } .after-arrow{       width: 0px;      height: 0px;      border-width: 30px;      border-style: solid;      border-color: transparent  transparent transparent #51D15B;   } .picture-carousel img {      width: 80px;      height: 80px;      transition: all 0.2s linear;      -moz-transition: all 0.2s ease-out;      -webkit-transition: all 0.2s ease-out;      -o-transition: all 0.2s ease-out;  } .img-setting {      margin: 0px -15px;  } .p1 {      transform: scale(0.6);      z-index: 1;  } .p1:hover {      transform: scale(0.8);  } .p2 {      transform: scale(0.8);      z-index: 2;  } .p2:hover {      transform: scale(1);  } .p3 {      transform: scale(1);      z-index: 3;  } .p3:hover {      transform: scale(1.2);  }  .name-box {      display: flex;      justify-content: center;      border: 1px solid #51D15B;  } .name-box .user-name {      width: 100%;      text-align: center;      padding: 10px;      outline-color: #42A855;      border: none;      font-size: 16px;  } .button-box{    display: flex;    justify-content: center;    margin: 10px 0 20px;}.button-box .login-button{    width: 100%;    padding: 10px 20px;    outline:none;    border: none;    background: #42A855;    color: white;    font-size: 16px;}.error-box{    color: #42A855;    border: 2px solid #42A855;    border-top: transparent;    border-left: transparent;    border-right: transparent;}.error-box span{    visibility: hidden;    color: #d43f3a;    font-size: 14px;}

login.js

// 用于存储图片顺序var imgArray = ["1","2","3","4","5"];// 获取箭头var leftArrow = document.getElementsByClassName("left-arrow")[0];var rightArrow = document.getElementsByClassName("right-arrow")[0];// 获取用户名var userName = document.getElementsByClassName("user-name")[0];// 获取登录按钮var loginButton = document.getElementsByClassName("login-button")[0];// 获取错误信息栏var errorMessage = document.getElementsByClassName("error-message")[0];// 添加左箭头监听事件leftArrow.addEventListener("click",function(){    imgArray.unshift(imgArray[imgArray.length - 1]);     //  向数组的开头添加一个元素    //      imgArray.pop();    //  删除并返回数组的最后一个元素    carouselImg();       //  切换图片});// 添加右箭头监听事件rightArrow.addEventListener("click",function(){    imgArray.push(imgArray[0]);     //  把第一个元素放在最后    imgArray.shift();           //  删除并返回数组的第一个元素    carouselImg();           //  切换图片});// 切换图片function carouselImg(){    for(var count = 0;count < imgArray.length;count++){        document.getElementsByTagName("img")[count].src = "./img/" + imgArray[count] + ".jpg";        document.getElementsByTagName("img")[count].alt=imgArray[count] + ".jpg";    }}// 添加登录按钮监听事件loginButton.addEventListener("click",function(){    if(userName.value === ""){        errorMessage.innerHTML = "Please Type You Name";        errorMessage.style.visibility = "visible";    }else if(userName.value.length > 8){        errorMessage.innerHTML = "Your Name Cannot Over 8 Words";        errorMessage.style.visibility = "visible";    }else{        window.location.href=encodeURI("index.html?selectpicture=" + document.getElementsByClassName("p3")[0].alt +                                     "&username=" + userName.value);    }});// Enter按键绑定登录事件  document.onkeydown = function (event) {      var e = event || window.event;      if(e && e.keyCode === 13){        loginButton.click();    }};

index.html

<!DOCTYPE html><html><head>    <meta charset="utf-8" />    <meta http-equiv="X-UA-Compatible" content="IE=edge">    <title>chat-room</title>    <meta name="viewport" content="width=device-width, initial-scale=1">    <link rel="stylesheet" href="./css/index.css" /></head><body>    <div>        <!-- 聊天框头部 -->        <div>            <div>                <input type="button" value="LOGOUT" />            </div>        </div>        <!-- 聊天框主体 -->        <div>            <!-- 聊天框左侧 -->            <div>                <!-- 聊天框左侧聊天内容 -->                <div></div>                <!-- 聊天框左侧聊天输入框 -->                <div>                    <input type="text" placeholder="Please Type You Message" maxlength="15"/>                    <input type="button" value="SEND" />                </div>            </div>            <!-- 聊天框右侧 -->            <div>                <!-- 聊天框右侧统计人数 -->                <div>Online:0</div>                <!-- 聊天框右侧用户名 -->                <div>user-name</div>                <!-- 聊天框右侧头像 -->                <img  />            </div>        </div>    </div></body></html><script src="./js/socket.io.js"></script><script src="./js/index.js"></script>

index.css

*{    margin: 0;    padding: 0;    font-family: "Microsoft Yahei"}html,body{    width: 100%;    height: 100%;}body{    display: flex;    justify-content: center;    align-items: center;    background: linear-gradient(-135deg,#51D15B,#42A855);    background: -moz-linear-gradient(-135deg,#51D15B,#42A855);    background: -webkit-linear-gradient(-135deg,#51D15B,#42A855);    background: -o-linear-gradient(-135deg,#51D15B,#42A855);}.chat-box{    width: 50%;    max-width: 720px;    min-width: 400px;    height: 80%;    min-height: 530px;    max-height: 530px;    display: flex;    flex-direction: column;    background: #fff;    box-shadow: 1px 1px 15px #333;}.chat-header{    margin: 5px;    box-shadow: 1px 1px 15px #7B8C99;}.button-box{    display: flex;    justify-content: flex-end;}.log-out{    height: 100%;    font-size: 14px;    font-weight: bold;    padding: 5px 15px;    color: #79C2EA;    background: #fff;    outline: none;    border: none;    border-radius: 15px;    cursor: pointer;}.chat-body{    height: 90%;    display: flex;    flex-direction: row;    justify-content: space-around;    align-items: center;    margin: 5px;    padding: 5px;}.chat-body-left{    height: 100%;    width: 70%;    display: flex;    flex-direction: column;    justify-content: space-around;    margin: 5px;}.chat-content{    box-shadow: 1px 1px 15px #7B8C99;    height: 100%;    margin-bottom: 5px;    overflow: scroll;} .my-message-box {      display: flex;      justify-content: flex-end;      align-content: center;      margin: 5px;  } .other-message-box {      display: flex;      justify-content: flex-start;      align-content: center;      margin: 5px;  } .message-content {      display: flex;      justify-content: center;    align-content: center;    background-color: #51D15B;      padding:5px 10px;    border-radius: 15px;      color: #fff;  } .other-message-content{    display: flex;    justify-content: center;    align-content: center;    background-color: #79C2EA;    padding: 5px 10px;    border-radius: 15px;    color: #fff;}.message-content span{    padding:20px 0px;}.user-chat-img {      width: 50px;      height: 50px;  } .other-message-content span{    padding: 20px 0px;}.message-arrow{    width: 0;    height: 0;    border-width:8px;    border-style: solid;    border-color: transparent transparent transparent #51D15B;    align-self: center;}.other-message-arrow{    width: 0;    height: 0;    border-width: 8px;    border-style: solid;    border-color: transparent #79C2EA transparent transparent;    align-self: center;}.user-information{    display: flex;    flex-direction: column;    align-content: flex-end;}.other-user-information{    display: flex;    flex-direction: column;    align-content: flex-end;}.user-chat-name{    color: #333;    font-size: 16px;    text-align: center;}.chat-edit{    margin-top: 5px;    display: flex;    justify-content: space-between;    align-items: center;    box-shadow: 1px 1px 15px #7B8C99;    overflow: hidden;}.edit-box{    width: 80%;    height: 100%;    margin: 5px;    border: none;    outline: none;}.edit-button{    height: 100%;    padding: 5px 15px;    background: #fff;    color: #79C2EA;    outline: none;    border: none;    border-radius: 15px;    cursor: pointer;    font-size: 14px;    font-weight: bold;}.chat-body-right{    height: 100%;    width: 30%;    display: flex;    flex-direction: column;    justify-content: center;    align-items: center;    margin: 5px;    box-shadow: 1px 1px 15px #7B8C99;}.user-name{    margin: 15px;    font-size: 18px;    font-weight: bold;    color: #79C2EA;}.user-img{    width: 100px;    height: 100px;    margin: 5px;}.online-count{    font-size: 18px;    font-weight: bold;    color: #79C2EA;}@media screen and (max-width:420px){    .chat-box{        width: 50%;        max-width: 720px;        min-width: 300px;        height: 80%;        min-height: 530px;        max-height: 530px;    }    .chat-body-left{        height: 100%;        width: 100%;        display: flex;        flex-direction: column;        justify-content: space-around;        margin: 5px;    }    .chat-body-right{        display: none;    }}

index.js

// 获取url里面的内容var url = decodeURI(location.href).split("?")[1].split("&"); //..数组第一个元素为图片路径,第二个元素为用户名console.log(url);// 获取聊天内容框var chatContent = document.getElementsByClassName("chat-content")[0];// 获取聊天输入框var editBox =  document.getElementsByClassName("edit-box")[0];// 获取聊天输入框发送按钮var editButton = document.getElementsByClassName("edit-button")[0];// 获取用户名栏var userName = document.getElementsByClassName("user-name")[0];// 获取在线人数栏var onlineCount = document.getElementsByClassName("online-count")[0];// 登录页面的名称放在右侧userName.innerHTML = url[1].split("=")[1];var userImg = document.getElementsByClassName("user-img")[0];// 把登录页面的头像放在右侧userImg.src = `./img/${url[0].split("=")[1]}`;var logOut = document.getElementsByClassName("log-out")[0];// 发送按钮绑定点击事件editButton.addEventListener("click",sendMessage);// 登出按钮绑定点击事件logOut.addEventListener("click",closePage);// 绑定Enter键和发送事件document.onkeydown = function(event){    var e = event || window.event;    if(e && e.keyCode === 13){        if(editBox.value !== ""){            editButton.click();        }    }};// 关闭页面function closePage(){    var userAgent = navigator.userAgent;    console.log(`userAgent=${userAgent}`);    if(userAgent.indexOf("Firefox") != -1 || userAgent.indexOf("Chrome") != -1){  //..如果是火狐或者谷歌        window.location.href = "about:blank";    }else{        window.opener = null;        window.open("","_self");        window.close();    }}// socket部分var socket = io();// 当接收到消息并且不是本机时生成聊天气泡socket.on("message",function(information){    console.log("收到消息",information);    if(information.name !== userName.textContent){  //  不是本机时        createOtherMessage(information);   //  生成聊天气泡    }});// 当接收到有人连接进来socket.on("connected",function(onlinecount){    console.log(`有人登录,在线人数为:${onlinecount}`);    onlineCount.innerHTML = "Online:" + onlinecount;});// 当接收到有人断开后socket.on("disconnected",function(onlinecount){    console.log(`有人断开啦:当前人数为:${onlinecount}`);    onlineCount.innerHTML = "Online:" +onlinecount;});// 发送本机的消息function sendMessage(){    if(editBox.value != ""){     //..如果发送内容不为空        var myInformation = {            name :userName.textContent,            chatContent : editBox.value,            img : userImg.src        };        socket.emit("message",myInformation);        createMyMessage();    //  创建本机聊天气泡        editBox.value = "";   //..清空文本框    }}// 生成本机的聊天气泡function createMyMessage(){    var myMessageBox = document.createElement("div");    myMessageBox.className = "my-message-box";    var messageContent = document.createElement("div");    messageContent.className = "message-content";    var text = document.createElement("span");    text.innerHTML = editBox.value;    messageContent.appendChild(text);    myMessageBox.appendChild(messageContent);    var arrow = document.createElement("div");    arrow.className = "message-arrow";    myMessageBox.appendChild(arrow);    var userInformation = document.createElement("div");    userInformation.className = "user-information";    var userChatImg = document.createElement("img");    userChatImg.className = "user-chat-img";    userChatImg.src = userImg.src;    var userChatName = document.createElement("div");    userChatName.className = "user-chat-name";    userChatName.innerHTML= userName.textContent;    userInformation.appendChild(userChatImg);    userInformation.appendChild(userChatName);    myMessageBox.appendChild(userInformation);    chatContent.appendChild(myMessageBox);    chatContent.scrollTop = chatContent.scrollHeight;  //  滚动到最新聊天内容}// 生成其他用户的聊天气泡  function createOtherMessage(information) {      var otherMessageBox = document.createElement("div");      otherMessageBox.className = "other-message-box";     var otherUserInformation = document.createElement("div");      otherUserInformation.className = "other-user-information";      var userChatImg = document.createElement("img");      userChatImg.className = "user-chat-img";      userChatImg.src = information.img;      var userChatName = document.createElement("span");      userChatName.className = "user-chat-name";      userChatName.innerHTML = information.name;      otherUserInformation.appendChild(userChatImg);      otherUserInformation.appendChild(userChatName);      otherMessageBox.appendChild(otherUserInformation);     var otherMessageArrow = document.createElement("div");      otherMessageArrow.className = "other-message-arrow";      otherMessageBox.appendChild(otherMessageArrow);     var otherMessageContent = document.createElement("div");      otherMessageContent.className = "other-message-content";      var text = document.createElement("span");      text.innerHTML = information.chatContent;      otherMessageContent.appendChild(text);      otherMessageBox.appendChild(otherMessageContent);     chatContent.appendChild(otherMessageBox);     chatContent.scrollTop = chatContent.scrollHeight;  }

server.js

// 引入必须模棱var express = require("express");var app = express();var http = require("http").Server(app);var io = require("socket.io")(http);var path = require("path");// 在线人数统计var onlineCount = 0;app.use(express.static(__dirname));// 路径映射app.get("/login.html",function(request,response){    response.sendFile("login.html");});// 当有用户连接进来时io.on("connection",function(socket){    console.log("a user connected");    // 发送给客户端在线人数    io.emit("connected",++onlineCount);    // 当有用户断开    socket.on("disconnect",function(){            console.log("user disconnected");            // 发送给客户端人数            io.emit("disconnected",--onlineCount);            console.log(onlineCount);    });    // 收到了客户端发来的消息    socket.on("message",function(message){        // 给客户端发送消息        console.log("服务器收到的消息为:",message);        io.emit("message",message);    });});var server = http.listen(4000,function(){    console.log("Server is running");});

最后

终端输入

node server.js

浏览器地址栏输入

http://localhost:4000/login.html

Node.js怎么实现在线实时多人聊天室

Node.js怎么实现在线实时多人聊天室

Node.js怎么实现在线实时多人聊天室

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