vue使用WebSocket模擬實現聊天功能
效果展示 兩個瀏覽器相互模擬
在vue根目錄下創建 server.js 文件模擬后端服務器
**在server終端目錄下載 **
npm install --s ws
2.編寫server.js文件代碼如下
var userNum = 0; //統計在線人數var chatList = [];//記錄聊天記錄var WebSocketServer = require(’ws’).Server;wss = new WebSocketServer({ port: 8181 }); //8181 與前端相對應//調用 broadcast 廣播，實現數據互通和實時更新wss.broadcast = function (msg) { wss.clients.forEach(function each(client) {client.send(msg); });};wss.on(’connection’, function (ws) { userNum++;//建立連接成功在線人數 +1 wss.broadcast(JSON.stringify({ funName: ’userCount’, users: userNum, chat: chatList })); //建立連接成功廣播一次當前在線人數 console.log(’Connected clients:’, userNum); //接收前端發送過來的數據 ws.on(’message’, function (e) {var resData = JSON.parse(e)console.log(’接收到來自clent的消息：’ + resData.msg)chatList.push({ userId: resData.userId, content: resData.msg });//每次發送信息，都會把信息存起來，然后通過廣播傳遞出去，這樣此每次進來的用戶就能看到之前的數據wss.broadcast(JSON.stringify({ userId: resData.userId, msg: resData.msg })); //每次發送都相當于廣播一次消息 }); ws.on(’close’, function (e) {userNum--;//建立連接關閉在線人數 -1wss.broadcast(JSON.stringify({ funName: ’userCount’, users: userNum, chat: chatList }));//建立連接關閉廣播一次當前在線人數console.log(’Connected clients:’, userNum);console.log(’長連接已關閉’) })})console.log(’服務器創建成功’)
然后npm run start啟動服務器
3.vue前端頁面代碼如下
<template> <div class='chat-box'> <header>聊天室人數：{{count}}</header> <div ref='msg-box'> <divv-for='(i,index) in list':key='index' : ><div class='user-head'> <div : ></div></div><div class='user-msg'> <span : : >{{i.content}}</span></div> </div> </div> <div class='input-box'> <input type='text' ref='sendMsg' v-model='contentText' @keyup.enter='sendText()' /> <div : @click='sendText()'>發送</div> </div> </div></template> <script>export default { data() { return { ws: null, count: 0, userId: null, //當前用戶ID list: [], //聊天記錄的數組 contentText: '', //input輸入的值 }; }, created() { this.getUserID(); }, mounted() { this.initWebSocket(); }, methods: { //根據時間戳作為當前用戶ID getUserID() { let time = new Date().getTime(); this.userId = time; }, //根據userID生成一個隨機頭像 getUserHead(id, type) { let ID = String(id); if (type == 'bck') {return Number(ID.substring(ID.length - 3)); } if (type == 'polygon') {return Number(ID.substring(ID.length - 2)); } if (type == 'rotate') {return Number(ID.substring(ID.length - 3)); } }, //滾動條到底部 scrollBottm() { let el = this.$refs['msg-box']; el.scrollTop = el.scrollHeight; }, //發送聊天信息 sendText() { let _this = this; _this.$refs['sendMsg'].focus(); if (!_this.contentText) {return; } let params = {userId: _this.userId,msg: _this.contentText, }; _this.ws.send(JSON.stringify(params)); //調用WebSocket send()發送信息的方法 _this.contentText = ''; setTimeout(() => {_this.scrollBottm(); }, 500); }, //進入頁面創建websocket連接 initWebSocket() { let _this = this; //判斷頁面有沒有存在websocket連接 if (window.WebSocket) {// 此處的 :8181 端口號 要與后端配置的一致let ws = new WebSocket('ws://192.168.5.42:9502'); // let ws = new WebSocket('ws://192.168.5.8:8181'); //這里是我本地測試_this.ws = ws;ws.onopen = function (e) { console.log('服務器連接成功');};ws.onclose = function (e) { console.log('服務器連接關閉');};ws.onerror = function () { console.log('服務器連接出錯');};ws.onmessage = function (e) { //接收服務器返回的數據 let resData = JSON.parse(e.data); if (resData.funName == 'userCount') { _this.count = resData.users; _this.list = resData.chat; } else { _this.list = [ ..._this.list, { userId: resData.userId, content: resData.msg }, ]; }}; } }, },};</script> <style lang='scss' scoped>.chat-box { margin: 0 auto; background: #fafafa; position: absolute; height: 100%; width: 100%; // max-width: 700px; header { position: fixed; width: 100%; height: 3rem; background: #409eff; // max-width: 700px; display: flex; justify-content: center; align-items: center; font-weight: bold; color: white; font-size: 1rem; } .msg-box { position: absolute; height: calc(100% - 6.5rem); width: 100%; margin-top: 3rem; overflow-y: scroll; .msg { width: 95%; min-height: 2.5rem; margin: 1rem 0.5rem; position: relative; display: flex; justify-content: flex-start !important; .user-head {min-width: 2.5rem;width: 20%;width: 2.5rem;height: 2.5rem;border-radius: 50%;background: #f1f1f1;display: flex;justify-content: center;align-items: center;.head { width: 1.2rem; height: 1.2rem;}// position: absolute; } .user-msg {width: 80%;// position: absolute;word-break: break-all;position: relative;z-index: 5;span { display: inline-block; padding: 0.5rem 0.7rem; border-radius: 0.5rem; margin-top: 0.2rem; font-size: 0.88rem;}.left { background: white; animation: toLeft 0.5s ease both 1;}.right { background: #53a8ff; color: white; animation: toright 0.5s ease both 1;}@keyframes toLeft { 0% { opacity: 0; transform: translateX(-10px); } 100% { opacity: 1; transform: translateX(0px); }}@keyframes toright { 0% { opacity: 0; transform: translateX(10px); } 100% { opacity: 1; transform: translateX(0px); }} } } } .input-box { padding: 0 0.5rem; position: absolute; bottom: 0; width: 97%; height: 3.5rem; background: #fafafa; box-shadow: 0 0 5px #ccc; display: flex; justify-content: space-between; align-items: center; input { height: 2.3rem; display: inline-block; width: 100%; padding: 0.5rem; border: none; border-radius: 0.2rem; font-size: 0.88rem; } .btn { height: 2.3rem; min-width: 4rem; background: #e0e0e0; padding: 0.5rem; font-size: 0.88rem; color: white; text-align: center; border-radius: 0.2rem; margin-left: 0.5rem; transition: 0.5s; line-height: 2.3rem; } .btn-active { background: #409eff; } }}</style> 然后npm run dev，就可以實現局域網聊天了，有無線的話可以用手機連著無線訪問你的IP地址訪問，沒的話可以試下多開幾個窗口，也是能看到效果的！！ 進入聊天室時和發送信息時服務器的打印日志
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