微信小程序websocket實(shí)現(xiàn)即時(shí)聊天功能
今天給大家分享一下本人做小程序使用websocket的一點(diǎn)小經(jīng)驗(yàn),希望對大家有所幫助。
使用之前肯定首先要了解一下websocket是什么,簡單來講websocket就是客戶端與服務(wù)器之間專門建立的一條特殊通道,請求只需要請求一次,而且還可以從通道實(shí)時(shí)獲取服務(wù)器數(shù)據(jù),非常適合應(yīng)用到實(shí)時(shí)應(yīng)用上。
因?yàn)檫@里本人是分享小程序,所以就不去深究websocket的底層和協(xié)議了,感興趣的朋友可以去看下websocket協(xié)議
建議大家在做之前先看看微信小程序官方提供的api關(guān)于websocket的文檔,因?yàn)槲⑿诺膚ebsocket接口雖然和HTML5的websocket基本一樣但是語法上還是有少許偏差,了解一下還是很有必要的。
話不多說上代碼(css代碼就不貼了,就是一些簡單的聊天樣式排版)
wxml
<view> <scroll-view scroll-y="true" scroll-with-animation="true" scroll-x="false" scroll-into-view="list-{{idx}}" class="twnav"> <view class='twChild'> <!-- <text>視頻聊天室</text> --> <view class='tellRoom' wx:for="{{tellData}}" wx:for-index="idx" wx:for-item="li" wx:key="li" id='list-{{li.id}}'> <view class='myHead'> <image class='sayHead' wx-if='{{li.type=="question"||li.type=="message"}}' src='{{li.avatarurl}}'></image> <image class='sayHead' wx-if='{{li.type=="answer"}}' src='{{li.content.orgLogo}}'></image> </view> <view class='tellDetail'> <text class='name' wx-if='{{li.type=="question"||li.type=="message"}}'>{{li.displayName}}:</text> <text class='name' wx-if='{{li.type=="answer"}}'>{{li.content.orgName}}回復(fù){{li.displayName}}:</text> <view wx-if='{{li.type=="answer"}}' class='answer'> <view class='anQue'>{{li.content.question}}</view> <view class='anAn'>{{li.content.answer}}</view> </view> <image wx-if='{{li.type=="question"}}' class='question' src='../../image/icon_quiz@2x.png' mode='widthFix'></image> <text class='sayDetail' wx-if='{{li.type=="question"}}'>{{li.content.content}}</text> <text class='sayDetail' wx-if='{{li.type=="message"}}'>{{li.content}}</text> </view> </view> <view class='ccds'></view> </view> </scroll-view> <view class='btn' wx-if='{{tell==true&&promodal==false}}'> <form bindreset="foo"> <input class="myinput" placeholder="說點(diǎn)什么吧" bindinput="sayValue" focus='{{myinputing}}'/> <button form-type="reset" class='sub' wx-if='{{isSend=="send"||isSend=="sureAsk"}}' bindtap='sendMes'>發(fā)送</button> <button form-type="reset" class='sub' wx-if='{{isSend=="ask"}}' bindtap='ask'>問</button> </form> </view> </view>
js
const app = getApp() var server = app.globalData.myUrl//這是自己的服務(wù)端接口地址設(shè)置于app.js var WxParse = require('../../wxParse/wxParse.js'); var tellPage = 1 var myurl='ws://+"你自己的鏈接地址"' var ws // socket發(fā)送的消息隊(duì)列 var socketMsgQueue = [] var socketOpen = true // 判斷心跳變量 var heart = '' // 心跳失敗次數(shù) var heartBeatFailCount = 0 // 終止心跳 var heartBeatTimeOut = null; // 終止重新連接 var connectSocketTimeOut = null; Page({ /** * 頁面的初始數(shù)據(jù) */ data: { sayValue:'', tellData:[],//聊天消息 idx:'', id:'', fjh:'',//房間號 myinputing:'', isSend: 'ask', }, /** * 生命周期函數(shù)--監(jiān)聽頁面加載 */ onLoad: function (options) { this.setData({ id: options.id, fjh:options.roomNum, }) this.history(1) this.connectStart() }, /** * 生命周期函數(shù)--監(jiān)聽頁面初次渲染完成 */ onReady: function () { //監(jiān)聽websocket連接狀態(tài) this.deal() }, /** * 生命周期函數(shù)--監(jiān)聽頁面顯示 */ onShow: function () { console.log() }, /** * 生命周期函數(shù)--監(jiān)聽頁面隱藏 */ onHide: function () { }, /** * 生命周期函數(shù)--監(jiān)聽頁面卸載 */ onUnload: function () { var that = this //離開頁面銷毀websocket并恢復(fù)初始數(shù)據(jù) wx.closeSocket() twice = 0 socketOpen = true heart = '' // 心跳失敗次數(shù) heartBeatFailCount = 0 // 終止心跳 heartBeatTimeOut = null; // 終止重新連接 connectSocketTimeOut = null; }, /** * 頁面相關(guān)事件處理函數(shù)--監(jiān)聽用戶下拉動作 */ onPullDownRefresh: function () { }, /** * 頁面上拉觸底事件的處理函數(shù) */ onReachBottom: function () { }, /** * 用戶點(diǎn)擊右上角分享 */ onShareAppMessage: function () { console.log('點(diǎn)擊分享') }, //獲取聊天室歷史記錄 history: function (a) { var that = this wx.request({ url: server + 'api/message/chatmsg', header: { "Authorization": app.globalData.token, }, data: { page: a, type: '', resultsPerPage: 1000, stream: that.data.id }, success: (res) => { var h = res.data.data.items if (h.length > 0) { var myArr = [] var c = 0 h.forEach(i => { c++ i.id = c if (i.type == 'question' || i.type == 'answer') { i.content = JSON.parse(i.content) } myArr.push(i) }) var j = h.length - 1 var idx = h[j].id // console.log(h, idx) that.setData({ tellData: h, idx: idx, }) } } }) }, //與socket建立連接 connectStart: function () { var that = this ws = wx.connectSocket({ url: myurl, header: { "Authorization": app.globalData.token, 'content-type': 'application/json' }, data: JSON.stringify({ token: app.globalData.token, type: 3, payLoad: { topic: that.data.fjh } }), success: (res) => { // console.log("進(jìn)入聊天", res) }, fail: (err) => { wx.showToast({ title: '網(wǎng)絡(luò)異常!', }) console.log(err) }, }) // 連接成功 wx.onSocketOpen((res) => { console.log('WebSocket 成功連接', res) that.resMes() // 開始心跳 that.startHeartBeat() }) //連接失敗 wx.onSocketError((err) => { console.log('websocket連接失敗', err); twice=0 that.connectStart() }) }, // 開始心跳 startHeartBeat: function () { // console.log('socket開始心跳') var that = this; heart = 'heart'; that.heartBeat(); }, // 心跳檢測 heartBeat: function () { var that = this; if (!heart) { return; } var xtData = { token: app.globalData.token, type: 1, payLoad: "" } // console.log(JSON.stringify({ xtData })) that.sendSocketMessage({ msg: JSON.stringify(xtData), data: JSON.stringify(xtData), success: function (res) { // console.log('socket心跳成功',res); if (heart) { heartBeatTimeOut = setTimeout(() => { that.heartBeat(); }, 5000); } }, fail: function (res) { console.log('socket心跳失敗'); if (heartBeatFailCount > 2) { // 重連 console.log('socket心跳失敗') that.connectStart(); } if (heart) { heartBeatTimeOut = setTimeout(() => { that.heartBeat(); }, 5000); } heartBeatFailCount++; }, }); }, // 進(jìn)入聊天 resMes: function () { var that = this var joinData = { token: app.globalData.token, type: 3, payLoad: JSON.stringify({ topic: that.data.fjh }), } // console.log(joinData) that.sendSocketMessage({ msg: JSON.stringify(joinData), data: JSON.stringify(joinData), success: function (res) { // console.log('進(jìn)入房間成功', res); that.deal() }, fail: function (err) { console.log('進(jìn)入房間失敗'); }, }) }, // 結(jié)束心跳 stopHeartBeat: function () { // console.log('socket結(jié)束心跳') var that = this; heart = ''; if (heartBeatTimeOut) { clearTimeout(heartBeatTimeOut); heartBeatTimeOut = null; } if (connectSocketTimeOut) { clearTimeout(connectSocketTimeOut); connectSocketTimeOut = null; } }, // 消息發(fā)送 foo: function () { if (this.data.inputValue) { //Do Something } else { //Catch Error } this.setData({ inputValue: ''//將data的inputValue清空 }); return; }, sayValue: function (e) { var that = this // console.log(this.data.isSend) if (that.data.isSend == 'ask') { that.setData({ isSend: 'send' }) } that.setData({ sayValue: e.detail.value }) }, sendMes: function (e) { var that = this // console.log(this.data.sayValue, 111) var myInput = this.data.sayValue var token = app.globalData.token if (that.data.isSend == 'sureAsk') { wx.request({ url: server + 'api/question/add', method: 'POST', header: { "Authorization": app.globalData.token, 'content-type': 'application/json' }, data: { content: myInput, streamId: that.data.id }, success: (res) => { console.log(res, '我的提問') } }) } else { // console.log(app.globalData.userInfo) var chatInfo = { user: app.globalData.userInfo.id, displayName: app.globalData.userInfo.displayName, avatarurl: app.globalData.userInfo.avatarUrl, stream: that.data.id, content: myInput, type: "message", createdat: "2018-10-8 14:30" } var sendData = { token: token, type: 2, payLoad: JSON.stringify({ topic: that.data.fjh, chatInfo: JSON.stringify(chatInfo) }) } // console.log(JSON.stringify(sendData)) that.sendSocketMessage({ msg: JSON.stringify(sendData) }) } that.setData({ sayValue: '', isSend: 'ask' }) }, // 通過 WebSocket 連接發(fā)送數(shù)據(jù) sendSocketMessage: function (options) { var that = this if (socketOpen) { wx.sendSocketMessage({ data: options.msg, success: function (res) { if (options) { options.success && options.success(res); } }, fail: function (res) { if (options) { options.fail && options.fail(res); } } }) } else { socketMsgQueue.push(options.msg) } // ws.closeSocket(); // that.deal() }, // 監(jiān)聽socket deal: function () { var that = this ws.onOpen(res => { socketOpen = true; console.log('監(jiān)聽 WebSocket 連接打開事件。', res) }) ws.onClose(onClose => { console.log('監(jiān)聽 WebSocket 連接關(guān)閉事件。', onClose) // socketOpen = false; // that.connectStart() }) ws.onError(onError => { console.log('監(jiān)聽 WebSocket 錯誤。錯誤信息', onError) socketOpen = false }) ws.onMessage(onMessage => { var res = JSON.parse(onMessage.data) // console.log(res,"接收到了消息") if (res.code == 200) { // console.log('服務(wù)器返回的消息', res.data) var resData = JSON.parse(res.data) var arr = that.data.tellData resData.id = arr.length + 1 if (resData.type == 'question' || resData.type == 'answer') { resData.content = JSON.parse(resData.content) console.log('這是提問', resData.type, resData.content.content) } arr.push(resData) console.log(resData, arr.length) that.setData({ tellData: arr, idx: resData.id }) } else { } }) }, time: function (a) { var data = new Date(a) var year = data.getFullYear(); var month = data.getMonth() + 1; var day1 = data.getDate(); var hh = data.getHours(); //截取小時(shí) var mm = data.getMinutes(); //截取分鐘 if (month < 10) { month = '0' + month } if (day1 < 10) { day1 = '0' + day1 } if (hh < 10) { hh = '0' + hh } if (mm < 10) { mm = '0' + mm } var newday = month + "月" + day1 + ' ' + hh + ':' + mm return newday }, inputing: function () { console.log('獲取焦點(diǎn)') this.setData({ isSend: 'send' }) }, inputed: function () { // console.log('失去焦點(diǎn)') this.setData({ isSend: 'ask', }) }, ask: function () { // console.log('提問') this.setData({ myinputing: true, isSend: 'sureAsk' }) }, })
以上僅是前端部分本人小程序websocket的使用實(shí)例,具體的情況需要配合自己的服務(wù)端。希望對大家有所幫助,也歡迎大家互相討論。
相關(guān)文章
JavaScript設(shè)計(jì)模式之單體模式全面解析
單體模式可以說是javascript中最基本也是最有用的模式之一,接下來通過本文給大家解析js設(shè)計(jì)模式之單體模式,非常不錯,感興趣的朋友一起看看吧2016-09-09JavaScript 節(jié)點(diǎn)操作 以及DOMDocument屬性和方法
最近發(fā)現(xiàn)DOMDocument對象很重要,還有XMLHTTP也很重要 注意大小寫一定不能弄錯.2007-12-12JS實(shí)現(xiàn)十字坐標(biāo)跟隨鼠標(biāo)效果
這篇文章給大家分享一下通過JS實(shí)現(xiàn)十字坐標(biāo)跟隨鼠標(biāo)效果的代碼,有需要的朋友參考學(xué)習(xí)下吧。2017-12-12JavaScript中函數(shù)的防抖與節(jié)流詳解
這篇文章主要為大家詳細(xì)介紹了JavaScript中函數(shù)的防抖與節(jié)流,文中示例代碼介紹的非常詳細(xì),具有一定的參考價(jià)值,感興趣的小伙伴們可以參考一下,希望能夠給你帶來幫助2022-02-02JavaScript高級程序設(shè)計(jì) 讀書筆記之九 本地對象Array
本地對象Array,數(shù)組等操作函數(shù)2012-02-02