[{"_1":2,"_3":-5,"_4":-5},"loaderData",{"_5":6,"_7":8},"actionData","errors","root",{"_11":-5},"routes/user.$name.collections",{"_9":10,"_11":12,"_13":14,"_15":16,"_17":18,"_19":16},"topics",[35],"user",{"_20":21,"_13":14,"_22":23,"_24":14,"_25":26,"_27":28,"_29":30,"_31":32,"_33":34},"loginname","binbinecust","page",1,"limit",20,"total","id","35290","avatar_url","https://avatars1.githubusercontent.com/u/23292261?v=4","githubUsername","create_at","2018-11-12 05:07:50.934","score",25,"topic_count",0,"reply_count",5,"is_star",false,{"_20":36,"_37":38,"_39":40,"_41":42,"_43":44,"_45":46,"_47":34,"_48":34,"_31":49,"_50":51,"_25":52,"_53":54},"38001","author_id","35402","tab","share","content","# VueSocial\r\n[VueSocial](http://47.107.66.252:3001/public/dist/#/home) something like QQ、weibo、weixin（仿微博、微信的聊天社交平台）前后端分离的vue+express+socket.io练手项目前端代码在BlogPhone下，后端代码在server下。如果你觉得这个项目还不错的话，你的star是对我最好的鼓励。\r\n\r\n---\r\n\r\n## 预览\r\n在线demo http://47.107.66.252:3001/public/dist/#/home （pc端按了f12后有个小问题，刷新一下就好,resize触发的问题，待改进）\r\n[github地址](https://github.com/CBDxin/VueSocial)\r\n\r\n\r\n### 首页\r\n![微信图片_20181118231148.jpg](https://upload-images.jianshu.io/upload_images/13434832-a93efd387d8f785d.jpg?imageMogr2/auto-orient/strip%7CimageView2/2/w/450)\r\n\r\n\r\n### 消息\r\n![微信图片_20181118231142.jpg](https://upload-images.jianshu.io/upload_images/13434832-3c16c582cabf0c64.jpg?imageMogr2/auto-orient/strip%7CimageView2/2/w/450)\r\n\r\n\r\n### 聊天\r\n\r\n![微信图片_20181118231154.jpg](https://upload-images.jianshu.io/upload_images/13434832-d2c80908073ce036.jpg?imageMogr2/auto-orient/strip%7CimageView2/2/w/450)\r\n\r\n\r\n### 个人主页\r\n![微信图片_20181118231131.jpg](https://upload-images.jianshu.io/upload_images/13434832-c413e3834c8571df.jpg?imageMogr2/auto-orient/strip%7CimageView2/2/w/450)\r\n\r\n\r\n### 分享动态\r\n\r\n![微信图片_20181118231054.jpg](https://upload-images.jianshu.io/upload_images/13434832-2498e542f5e05bff.jpg?imageMogr2/auto-orient/strip%7CimageView2/2/w/450)\r\n\r\n\r\n### 更改头像\r\n\r\n![微信图片_20181118231115.jpg](https://upload-images.jianshu.io/upload_images/13434832-13cf4c7903c02766.jpg?imageMogr2/auto-orient/strip%7CimageView2/2/w/450)\r\n\r\n\r\n### 搜索页面\r\n\r\n\r\n![微信图片_20181118231126.jpg](https://upload-images.jianshu.io/upload_images/13434832-fd5d44764b4645d1.jpg?imageMogr2/auto-orient/strip%7CimageView2/2/w/450)\r\n![微信图片_20181118231137.jpg](https://upload-images.jianshu.io/upload_images/13434832-13be4267587d68f4.jpg?imageMogr2/auto-orient/strip%7CimageView2/2/w/450)\r\n\r\n---\r\n## 技术栈\r\n1. vue：前端框架\r\n2. express：后端框架\r\n3. socket.io：实现实时消息推送\r\n4. axios：一个基于 Promise 的 HTTP 库，发送ajax请求\r\n5. localStorage：浏览器本地存储\r\n6. Webpack：模块打包工具，前端项目构建工具\r\n7. mongoose：mongodb的框架\r\n8. better-scroll:一款重点解决移动端(已支持 PC)各种滚动场景需求的插件\r\n\r\n---\r\n## 已实现功能\r\n1. 登录注册\r\n2. 图片分享：上传本地图片到云服务器（我用的是阿里云的oss，可以根据自己的情况修改router/upload.js的代码）\r\n3. 头像修改\r\n4. 评论：socket.io\r\n5. 实时消息推送\r\n6. 查看个人主页\r\n7. 实时聊天：socket.io\r\n8. 首页下拉刷新：better-scroll\r\n9. 搜索：搜索用户与动态、使用localStorage保存历史搜索记录\r\n\r\n---\r\n## 待改进\r\n1. 同一个用户多个设备同时登录时socket.io会出现问题，所以要限制登录？还是修改数据库结构？\r\n2. 移动端的坑：有的浏览器会卡顿、Safari监听不到输入框按下搜索键（内心是崩溃的）\r\n3. resize时better-scroll的小bug\r\n4. 没做分页请求，都是一次性请求全部数据\r\n5. 评论。。。的名字直接用usename了。。。改名后会有问题。。。。有空在改\r\n\r\n---\r\n## 安装\r\n分别两个文件目录下安装依赖npm install，在server文件夹下node app.js,在blogPhone下npm run dev，然后打开localhost：8081就可以了\r\n \r\n\r\n---\r\n## 分析总结\r\n### socket.io\r\n## 引入socket. io\r\n\r\n\r\n**服务端:**\r\n\r\n```\r\n\r\n let serve = app.listen(3001);\r\n\r\n const io = socketio(serve);\r\n\r\n io.on('connection', socket => {\r\n\r\n socket.on('login', (username) => {\r\n\r\n console.log(username+'上线了！');\r\n\r\n });\r\n\r\n }\r\n\r\n```\r\n\r\n**客户端:**\r\n\r\n在index中引入\r\n\r\n```\r\n\r\n\r\n \r\n```\r\n## 整体思路\r\n把需要用到的数据存放在vuex中，在app.vue的updateBySocket()函数中整体监听服务端emit的事件，根据路由信息判断数据是要做一般处理还是交给对话框页面进行处理\r\n\r\n## 核心代码\r\n### 服务端（express实现）\r\n```\r\n let serve = app.listen(3001);\r\n const io = socketio(serve);\r\n io.on('connection', socket => {\r\n const socketId = socket.id;\r\n //登录时建立一个username到socketId的映射表\r\n socket.on('login', (username) => {\r\n socketHandler.saveUserSocketId(username, socketId)\r\n });\r\n\r\n socket.on('chat',(data) => {\r\n Idtoid.findOne({\r\n username: data.to_user\r\n }).then((rs) => {\r\n //根据用户名在映射表中找到对应的socketId\r\n io.to(rs.socketid).emit('receiveMsg',{\r\n from_user:data.from_user,\r\n message:data.message,\r\n time:data.time,\r\n avater:data.avater,\r\n _id:data._id\r\n })\r\n })\r\n })\r\n })\r\n```\r\n### app.vue\r\n`update_chatList`:更新聊天列表的mutation\r\n```\r\n...mapMutations([\r\n 'update_chatList'\r\n ]),\r\nupdateBySocket() {\r\n socket.removeAllListeners();\r\n socket.on('receiveMsg', (data) => {\r\n let from_user = data.from_user;\r\n //如果当前页面为与from_user的对话框，则交由对话框页面处理\r\n if (this.$route.query.chatwith == from_user) {\r\n return;\r\n }\r\n this.update_chatList(data);\r\n })\r\n }\r\n```\r\n### 对话框页面 chat.vue\r\n`dataList`：当前对话框的聊天记录\r\n```\r\n//发送消息\r\n sendMessage() {\r\n if (!this.userInfo._id){\r\n Toast(\"请先登录！\");\r\n return;\r\n }\r\n if (this.content == '') {\r\n return;\r\n }\r\n this.axios.post('/chat/chatwith', {//向后端传输聊天记录\r\n chatWithId: this.tUserInfo._id,\r\n user_id: this.userInfo._id,\r\n content: this.content\r\n }).then((result) => {\r\n //把自己发送的内容更新到dataList中\r\n this.dataList.push({\r\n user_id: {//这个有点乱了，这个是自己的信息\r\n avater: this.userInfo.avater\r\n },\r\n chatWith: {\r\n _id: this.chatWithId\r\n },\r\n addTime: Date.now(),\r\n content: this.content\r\n });\r\n //更新聊天用户的列表\r\n this.update_chatList({\r\n _id: this.tUserInfo._id,//自己的id\r\n from_user: this.chatWith,//与你聊天的用户\r\n message: this.content,//消息内容\r\n time: Date.now(),//时间);\r\n me: true,//判别是不是自己发送的\r\n avater:this.tUserInfo.avater\r\n });\r\n //要发送给对方的数据\r\n let data = {\r\n from_user: this.userInfo.username,//发送方\r\n to_user: this.chatWith,//接收方\r\n message: this.content,//消息内容\r\n time: Date.now(), //时间);\r\n avater: this.userInfo.avater,\r\n _id: this.userInfo._id\r\n };\r\n socket.emit('chat', data);\r\n this.content = '';\r\n })\r\n },\r\n updateBySocket() {\r\n socket.on('receiveMsg', (data) => {\r\n //判断一下是不是当前的对话框\r\n if (data.from_user == this.chatWith) {\r\n //把收到的消息保存到聊天记录中\r\n this.dataList.push({\r\n chatWith: {\r\n _id: this.userInfo._id\r\n },\r\n user_id: {//自己的信息\r\n avater: data.avater\r\n },\r\n addTime: data.addTime,\r\n content: data.message\r\n });\r\n this.update_chatList({\r\n _id: this.tUserInfo._id,\r\n from_user: this.chatWith,//与你聊天的用户\r\n message: data.message,//消息内容\r\n time: data.addTime,//时间);\r\n me: true,//判别是不是自己当前页面\r\n avater:this.tUserInfo.avater\r\n });\r\n }\r\n })\r\n }\r\n```\r\n\r\n## vuex mutation.js\r\n```\r\n[types.UPDATE_CHATLIST](state, data) {\r\n let flag = 0;//判断新的聊天是否存在于当前的列表中\r\n state.chatList.forEach((item)=>{\r\n if (item.chatWith.username == data.from_user) {\r\n flag = 1;\r\n if (!data.me) {//判断当前是否在对话框页面中\r\n item.unread++;\r\n state.unread++;\r\n }\r\n //更新\r\n item.content = data.message;\r\n item.addTime = data.time;\r\n //按添加时间排序\r\n state.chatList.sort((a, b) => {\r\n return new Date(b.addTime) - new Date(a.addTime)\r\n });\r\n //跳出循环\r\n return false;\r\n }\r\n });\r\n //是新的并且不在对话框页面\r\n if (!flag&&!data.me) {\r\n //添加到第一条\r\n state.chatList.unshift({\r\n chatWith: {\r\n avater: data.avater,\r\n username: data.from_user,\r\n _id: data._id\r\n },\r\n addTime: data.time,\r\n content: data.message,\r\n unread: 1\r\n });\r\n state.unread++;\r\n }else if (!flag&&data.me){//新的并且在对话框页面，不需要增加unread\r\n state.chatList.unshift({\r\n chatWith: {\r\n avater: data.avater,\r\n username: data.from_user,\r\n _id: data._id\r\n },\r\n addTime: data.time,\r\n content: data.message,\r\n });\r\n }\r\n }\r\n```\r\n\r\n## 总结\r\nsocket.io的简单使用其实并不难，只要掌握好以下几个函数\r\n\r\n`socket.emit()`：向建立该连接的客户端发送消息\r\n\r\n`socket.on()`：监听客户端发送信息\r\n\r\n`io.to(socketid).emit()`：向指定客户端发送消息\r\n\r\n`socket.broadcast.emit()`：向除去建立该连接的客户端的所有客户端广播\r\n\r\n`io.sockets.emit()`：向所有客户端广播\r\n\r\n### vue\r\n总结一些项目遇到的难点\r\n1. ajax在生命周期函数created发起，dom操作在生命周期函数mounted中操作，如果需要dom元素完全挂起后在操作则还需要在$nextTick中操作，例如：\r\n```\r\nmounted() {\r\n this.$nextTick(() => {\r\n this.initImg();\r\n })\r\n }\r\n```\r\n2. 动态生成（例如通过v-for）的dom元素在mounted中通过ref是获取不到的，需要在生命周期函数updated中获取\r\n3. keepalive后的组件如果需要在跳转进入时进行操作可通过路由守卫和生命周期函数actived配合使用，如：\r\n```\r\nbeforeRouteEnter(to, from, next) {\r\n if (from.path == '/upload' ) {\r\n next(vm => {\r\n vm._getList = true\r\n })\r\n } else {\r\n next()\r\n }\r\n }\r\n```\r\n```\r\nactivated() {\r\n this.$nextTick(() => {\r\n if (this._getList) {\r\n this.getPyqLists();\r\n }\r\n })\r\n }\r\n```\r\n\r\n## 图片上传及预览部分\r\nhtml部分主要是借助了weui的样式\r\n```\r\n\r\n\r\n```\r\n重点部分在于\r\n```\r\n

\r\n

\r\n \r\n

\r\n```\r\n通过` @change=\"change\"`监听图片的上传，把图片转成base64后（后面会讲怎么转base64）将base64的地址加入到images数组，通过` v-for=\"(image,index) in images\"`把要上传的图片在页面中显示出来，即达到了预览的效果\r\n\r\njs部分\r\ndata部分\r\n```\r\ndata() {\r\n return {\r\n content: '',//分享动态的文字内容\r\n maxSize: 10240000 / 2,//图片的最大大小\r\n maxCount: 8,//最大数量\r\n filesArr: [],//保存要上传图片的数组\r\n images: []//转成base64后的图片的数组\r\n }\r\n }\r\n```\r\ndelete方法\r\n```\r\ndeleteimg(index) {\r\n this.filesArr.splice(index, 1);\r\n this.images.splice(index, 1);\r\n }\r\n```\r\nchange方法\r\n```\r\nchange(e) {\r\n let files = e.target.files;\r\n // 如果没有选中文件，直接返回\r\n if (files.length === 0) {\r\n return;\r\n }\r\n if (this.images.length + files.length > this.maxCount) {\r\n Toast('最多只能上传' + this.maxCount + '张图片！');\r\n return;\r\n }\r\n let reader;\r\n let file;\r\n let images = this.images;\r\n for (let i = 0; i < files.length; i++) {\r\n file = files[i];\r\n this.filesArr.push(file);\r\n reader = new FileReader();\r\n if (file.size > self.maxSize) {\r\n Toast('图片太大，不允许上传！');\r\n continue;\r\n }\r\n reader.onload = (e) => {\r\n let img = new Image();\r\n img.onload = function () {\r\n let canvas = document.createElement('canvas');\r\n let ctx = canvas.getContext('2d');\r\n let w = img.width;\r\n let h = img.height;\r\n // 设置 canvas 的宽度和高度\r\n canvas.width = w;\r\n canvas.height = h;\r\n ctx.drawImage(img, 0, 0, w, h);\r\n let base64 = canvas.toDataURL('image/png');\r\n images.push(base64);\r\n };\r\n img.src = e.target.result;\r\n };\r\n reader.readAsDataURL(file);\r\n }\r\n }\r\n```\r\nput方法把filesArr中保存的图片通过axios发送到后端,注意要设置headers信息\r\n```\r\nput() {\r\n Indicator.open('发布中...');\r\n let self = this;\r\n let content = this.content;\r\n let param = new FormData();\r\n param.append('content', content);\r\n param.append('username', this.userInfo._id);\r\n this.filesArr.forEach((file) => {\r\n param.append('file2', file);\r\n });\r\n self.axios.post('/upload/uploadFile', param, {\r\n headers: {\r\n \"Content-Type\": \"application/x-www-form-urlencoded\"\r\n }\r\n }).then(function (result) {\r\n console.log(result.data);\r\n self.$router.push({path: '/home'});\r\n Indicator.close();\r\n Toast(result.data.msg)\r\n })\r\n }\r\n```\r\n\r\n后端通过multer模块保存传输的图片，再把保存下来的图片发送到阿里云oss（这个可以根据自己的使用情况变化）\r\n```\r\nlet filePath;\r\nlet fileName;\r\n\r\nlet Storage = multer.diskStorage({\r\n destination: function (req, file, cb) {//计算图片存放地址\r\n cb(null, './public/img');\r\n },\r\n filename: function (req, file, cb) {//图片文件名\r\n fileName = Date.now() + '_' + parseInt(Math.random() * 1000000) + '.png';\r\n filePath = './public/img/' + fileName;\r\n cb(null, fileName)\r\n }\r\n});\r\nlet upload = multer({storage: Storage}).any();//file2表示图片上传文件的key\r\n\r\nrouter.post('/uploadFile', function (req, res, next) {\r\n upload(req, res, function (err) {\r\n let content = req.body.content || '';\r\n let username = req.body.username;\r\n let imgs = [];//要保存到数据库的图片地址数组\r\n if (err) {\r\n return res.end(err);\r\n }\r\n if (req.files.length === 0) {\r\n new Pyq({\r\n writer: username,\r\n content: content\r\n }).save().then((result) => {\r\n res.json({\r\n result: result,\r\n code: '0',\r\n msg: '上传成功'\r\n });\r\n })\r\n }\r\n let i = 0;\r\n req.files.forEach((item, index) => {\r\n let filePath = `./public/img/${item.filename}`;\r\n put(item.filename,filePath,(result)=>{\r\n imgs.push(result.url);\r\n i++;\r\n if (i === req.files.length) {\r\n //forEach循环是同步的，但上传图片是异步的，所以用一个i去标记图片是否全部上传成功\r\n //这时才把数据保存到数据库\r\n new Pyq({\r\n content: content,\r\n writer: username,\r\n pimg: imgs\r\n }).save().then(() => {\r\n res.json({\r\n code: '0',\r\n msg: '发布成功'\r\n });\r\n })\r\n }\r\n })\r\n })\r\n })\r\n});\r\n```\r\n\r\n---\r\n\r\n# 如果觉得这个项目对你有帮助，请留下你的star，谢谢(＾－＾)","title","express+vue+socket.io实现可实时聊天、分享图片的社交平台","last_reply_at","2018-12-10 01:57:09.196","good","top",6,"visit_count",5241,"2018-11-28 15:12:58.581","author",{"_13":55,"_22":56},"CBDxin","https://avatars.githubusercontent.com/u/42411100?v=4"]