本文小编为大家详细介绍“Node.js+express+socket怎么实现在线实时多人聊天室”，内容详细，步骤清晰，细节处理妥当，希望这篇“Node.js+express+socket怎么实现在线实时多人聊天室”文章能帮助大家解决疑惑，下面跟着小编的思路慢慢深入，一起来学习新知识吧。
文件结构如下：
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"> <!--登录标题栏--> <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%;
}
/*最外层*/
.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;
}
/*LOGIN标题*/
.sign-title {
color: #42A855;
border: 2px solid #42A855;
border-top: transparent;
border-left: transparent;
border-right: transparent;
}
/*图片切换*/
.picture-carousel {
position: relative;
display: flex;
margin: 10%;
}
/*图片切换箭头*/
.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);
}
/*用户名*/
.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;
}
/* 登录按钮 */
.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;
}
/* 错误信息 */
.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%;
}
/* 背景色 */
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);
}
/* 最外层 */
.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;
}
/* 头部 */
.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;
}
/* 主体 */
.chat-body{
height: 90%;
display: flex;
flex-direction: row;
justify-content: space-around;
align-items: center;
margin: 5px;
padding: 5px;
}
/* 主体左侧 */
.chat-body-left{
height: 100%;
width: 70%;
display: flex;
flex-direction: column;
justify-content: space-around;
margin: 5px;
}
/* 左侧内容 */
.chat-content{
box-shadow: 1px 1px 15px #7B8C99;
height: 100%;
margin-bottom: 5px;
overflow: scroll;
}
/*聊天气泡*/
.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;
}
/* 聊天输入框 */
.chat-edit{
margin-top: 5px;
display: flex;
justify-content: space-between;
align-items: center;
box-shadow: 1px 1px 15px #7B8C99;
overflow: hidden;
}
/* 聊天输入框输入区域 */
.edit-box{
width: 80%;
height: 100%;
margin: 5px;
border: none;
outline: none;
}
/* 聊天输入框按钮 */
.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;
}
/* 主体右侧 */
.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;
}
/* 兼容小屏幕 */
@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
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