【珍惜時間】vue-websocket

這個項目多是個虎頭蛇尾的項目？跟我一塊兒分析吧，比較簡單的一個項目
另外，我也想跟本身說，我好像失去了那個努力的本身了。要珍惜時間，好好加油啊~
項目地址爲：https://github.com/xiaobeila/vue-websocket.git
這個項目和其餘的項目的區別是，這個項目裏面將服務器端，即websocket.io直接與前端項目集成在一塊兒了。

//app.js
var app = require('express')()
var http = require('http').Server(app)
var io = require('socket.io')(http)

// 設置跨域訪問
app.all('*', function (req, res, next) {
  res.header('Access-Control-Allow-Origin', '*')
  res.header('Access-Control-Allow-Headers', 'X-Requested-With')
  res.header('Access-Control-Allow-Methods', 'PUT,POST,GET,DELETE,OPTIONS')
  res.header('X-Powered-By', ' 3.2.1')
  res.header('Content-Type', 'application/json;charset=utf-8')
  next()
})

/**
 * 路由配置
 */
// 服務器根目錄
app.get('/', function (req, res) {
  res.send('<h1>Welcome Realtime Server</h1>')
})
// demo子目錄
app.get('/demo', function (req, res) {
  res.send('<h1>Welcome Realtime Server - demo</h1>')
})

// 在線用戶
var onlineUsers = []
// 當前在線人數
var onlineCount = 0

/**
 * 創建socket連接
 */
io.on('connection', function (socket) {
  console.log('a user connected')

  /**
     * 監聽新用戶加入
     */
  socket.on('login', function (obj) {
    // 將新加入用戶的惟一標識看成socket的名稱，後面退出的時候會用到
    socket.name = obj.userId
    // 檢查在線列表，若是不在裏面就加入
    if (!onlineUsers.hasOwnProperty(obj)) {
      onlineUsers.push(obj)
      onlineCount++// 在線人數+1
    }
    // 向全部客戶端廣播用戶加入
    io.emit('login', {
      onlineUsers: onlineUsers,
      onlineCount: onlineCount,
      user: obj
    })
    console.log(socket.handshake)// 打印握手信息
    console.log(obj.userName + ' 登陸')
  })

  /**
     * 監聽用戶退出
     */
  socket.on('disconnect', function () {
    console.log('[Leo]socket name => ', socket.name)
    // 將退出的用戶從在線列表中刪除
    for (let i = 0, len = onlineUsers.length; i < len; i++) {
      let user = onlineUsers[i]
      if (user.userId == socket.name) {
        let tempUser = user
        onlineUsers.splice(i, 1)
        onlineCount--
        io.emit('logout', {
          onlineUsers,
          onlineCount,
          user: tempUser
        })
        console.log(user.userName + ' 退出登陸', JSON.stringify(tempUser))
        break
      }
    }
    console.log('剩餘在線用戶 => ', JSON.stringify(onlineUsers))
  })

  /**
     * 監聽用戶發佈聊天內容
     */
  socket.on('message', function (obj) {
    // obj數據結構例子

    /* eslint-disable */
    let testObj = {
      'from': {
        'userId': '123',
        'userName': '123'
      },
      'to': {
        'userId': '456',
        'userName': '456'
      },
      content: '聊天內容',
      sendtime: '2016年10月9日 11:25:05'
    }
    // 向全部客戶端廣播發布的消息
    // io.emit('message', obj);
    io.emit(obj.to.userId, obj)
    console.log(
      obj.from.userName + ' 對 ' +
            obj.to.userName + ' 說 ' +
            obj.content
    )
  })
})

http.listen(3000, function () {
  console.log('listening on *:3000')
})

接下來咱們看客戶端的代碼

//main.js
import Vue from 'vue'
import App from './App.vue'
import router from './router'
import store from './store'
import * as filters from './filters'

import VueTimeago from 'vue-timeago'
// VueTimeago組件時間還有i18n的功能
Vue.use(VueTimeago, {
  name: 'timeago', // component name, `timeago` by default
  autoUpdate: 1,
  maxTime: 86400,
  locale: 'zh-CN',
  locales: {
    'zh-CN': require('date-fns/locale/zh_cn'),
    'ja': require('date-fns/locale/ja')
  }
})

Object.keys(filters).forEach(key => {
  Vue.filter(key, filters[key])
})

Vue.config.productionTip = false

const app = new Vue({
  router,
  store,
  ...App // Object spread copying everything from App.vue : render: h => h(App)
}).$mount('#app')// 掛載到DOM元素

export { app, store, router }

// new Vue({
//   render: h => h(App)
// }).$mount('#app')

router.js爲

import Vue from 'vue'
import Router from 'vue-router'

Vue.use(Router)

export const asyncRouterMap = [
  {
    path: '*',
    redirect: '/login'
  },
  {
    path: '/',
    redirect: '/login',
    component: resolve => require(['./views/pages/login'], resolve)
  },
  {
    path: '/login',
    name: 'login',
    component: resolve => require(['./views/pages/login'], resolve)
  },
  {
    path: '/dashboard',
    name: 'dashboard',
    component: resolve => require(['./views/pages/dashboard'], resolve),
    children: [{
      path: '/chat/:id/:name',
      name: 'chat',
      component: resolve => require(['./views/pages/chat'], resolve)
    }]
  }
]

export default new Router({
  mode: 'history',
  routes: asyncRouterMap
})

App.vue爲

<template>
  <div id="app">
    <router-view></router-view>
  </div>
</template>

<script>
export default {
  name: 'app'
}
</script>

<style>
#app {
  width: 100vw;
  height: 100vh;
}
</style>

<template>
  <div id="login">
    <ul class="login">
      <li><input type="text" name="userName" id="userName" placeholder="請輸入用戶名" required autofocus v-model="userName" @keyup.13="doLogin" /></li>
      <li>
        <a href="javascript:void(0);" @click="doLogin" class="login-btn">登陸</a>
      </li>
    </ul>
  </div>
</template>
<script>
import { mapState, mapMutations } from 'vuex'
import * as types from '../../store/mutation-types'

import io from 'socket.io-client'
import common from '../../utils/common'

export default {
  name: 'login',
  data () {
    return {
      userName: '',
      password: ''
    }
  },
  computed: {
    ...mapState({
      me: ({ users }) => users.me,
      online: ({ users }) => users.online,
      socket: ({ base }) => base.socket
    })
  },
  methods: {
    ...mapMutations({
      login: types.LOGIN,
      genUid: types.GEN_UID,
      setSocket: types.SET_SOCKET
    }),
    doLogin () {
      const _self = this
      if (!this.userName) {
        console.log('請輸入用戶名')
        return
      }

      // TODO:ajax獲取登陸數據
      let user = {
        userId: common.genUid(),
        userName: _self.userName
      }

      // 鏈接websocket後端服務器
      _self.setSocket(io('ws://127.0.0.1:3000'))

      if (_self.socket) {
        // 告訴服務器端有用戶登陸
        _self.socket.emit('login', user)

        // 貯存登陸用戶的信息
        _self.login(user)
      }

      // 進入首頁
      this.$router.push({ path: '/dashboard' })
    }
  }
}
</script>
<style scoped>
ul,
li {
  list-style: none;
}

.login {
  position: absolute;
  top: 50%;
  left: 50%;
  text-align: center;
  width: 400px;
  margin-left: -200px;
  margin-top: -150px;
  padding: 50px 20px;
  border-radius: 5px;
  box-shadow: 1px 1px 2px #ccc, -1px -1px 2px #ccc;
  background-color: #ffffff;
}

input[type="text"] {
  border: 1px solid #cccccc;
  line-height: 50px;
  width: 100%;
  text-align: center;
}

.login-btn {
  display: inline-block;
  margin-top: 20px;
  width: 100%;
  background-color: dodgerblue;
  color: #ffffff;
  line-height: 50px;
  text-decoration: none;
}
</style>

接下來進入了dashboard頁面

<template>
  <div class="main">
    <div class="top-menu clearfix">
      <span>IM</span>
      <span>
        <span v-text="me.userName"></span>&nbsp;&nbsp;|&nbsp;&nbsp;
        <a href="javascript:;" @click="doLogout">退出</a>
      </span>
    </div>
    <ul class="user-list">
      <li v-for="item in online.users" :key="item.id" track-by="$index" @click='chat(item)' :class="{'v-link-active':item.userId==currentActive}">
        {{item.userName}}
        <span class="noread" v-if="item.noRead">{{item.noRead}}</span>
      </li>
    </ul>
    <div class="doc">
      <router-view keep-alive></router-view>
    </div>
  </div>
</template>

<script>
import { mapState, mapGetters, mapActions, mapMutations } from 'vuex'
import * as types from '../../store/mutation-types'

export default {
  name: 'index',
  data () {
    return {
      currentActive: '-1'
    }
  },
  computed: {
    ...mapState({
      me: state => state.users.me,
      online: state => state.users.online,
      socket: ({ base }) => base.socket
    }),
    ...mapGetters({})
  },
  methods: {
    ...mapActions([]),
    ...mapMutations({
      logout: types.LOGOUT,
      updateUsers: types.UPDATE_USERS,
      addUsers: types.ADD_USERS,
      removeUser: types.REMOVE_USER,
      addReceiveMsg: types.ADD_RECEIVE_MSG
    }),
    doLogout () {
      this.socket.disconnect()
      this.logout()
      this.$router.push({ path: '/login' })
    },
    // 監聽新用戶登陸
    listenLogin () {
      const _self = this
      if (_self.socket) {
        _self.socket.on('login', function (o) {
          console.log('[Leo]新用戶加入 => ', o.user)
          console.log('[Leo]當前在線用戶 => ', o.onlineUsers)
          _self.updateUsers(o.onlineUsers)
        })
      }
    },
    // 監聽用戶退出
    listenLogout () {
      const _self = this
      if (_self.socket) {
        _self.socket.on('logout', function (o) {
          console.log('[Leo]有用戶退出 => ', o)
          _self.removeUser(o.user.userId)
        })
      }
    },
    // 監聽消息發送
    listenMsg () {
      const _self = this
      if (_self.socket) {
        _self.socket.on(_self.me.userId, function (obj) {
          console.log('[Leo]有人對我說話 => ', obj.from.userName + ' 對 ' + obj.to.userName + ' 說 ' + obj.content)
          _self.addReceiveMsg(obj)
        })
      }
    },
    chat (user) {
      this.currentActive = user.userId
      this.$router.push({
        name: 'chat',
        params: {
          id: user.userId,
          name: user.userName
        }
      })
    }
  },
  created () {
    if (!this.me.userName) {
      this.$router.push({ name: 'login' })
    }
    this.listenLogin()
    this.listenLogout()
    this.listenMsg()
  }
}
</script>
<style lang="less" scoped>
.main {
  position: relative;
  width: 100vw;
  height: 100vh;
  border: 1px solid #efefef;
  box-shadow: 1px 1px 15px #ccc;
  background-color: #efeff4;
  overflow: hidden;
}

.top-menu {
  background-color: #3d3d3d;
  color: #fff;
  height: 45px;
  width: 100%;
  font-size: 12px;
  line-height: 45px;
  font-size: larger;
  font-family: "Microsoft YaHei UI", "微軟雅黑", "Helvetica Neue", Helvetica,
    STHeiTi, sans-serif;

  span:first-child {
    text-align: left;
    margin-left: 10px;

    & + span {
      float: right;
      margin-right: 10px;
    }
  }

  a {
    color: #ffffff;
    text-decoration: none;
  }
}

ul,
li {
  list-style: none;
  padding: 0;
  margin: 0;
}

.user-list {
  position: absolute;
  top: 45px;
  bottom: 0;
  left: 0;
  z-index: 9999999;
  width: 300px;
  overflow-y: auto;
  background-color: #fff;
  box-shadow: 3px 2px 5px #ccc;
  @height: 30 px;
  li {
    padding: 10px;
    line-height: @height;
    cursor: pointer;
    border-bottom: 1px dashed #efefef;

    img {
      float: left;
      width: @height;
      border-radius: 50%;
    }
    & :hover,
    & :active {
      background: #efefef;
    }
    .noread {
      display: inline-block;
      background-color: #f00;
      color: #fff;
      min-width: 20px;
      height: 20px;
      border-radius: 50%;
      font-size: 12px;
      line-height: 20px;
      text-align: center;
    }
  }
}
.doc {
  position: absolute;
  top: 45px;
  bottom: 0;
  left: 300px;
  right: 0;
}
.v-link-active {
  background-color: #efefef;
}
</style>

//src\views\pages\chat.vue
<template>
  <div class="chat">
    <div class="list">
      <ul>
        <li v-for="msg in getMsgs" :key="msg.id">
          <msg-item :type="msg.from.userId==me.userId?'me':'other'" :msg="msg"></msg-item>
        </li>
      </ul>
    </div>
    <div class="send">
      <div class="send-bar">
        <input type="file" id="fileImg" name="fileImg" style="display: none;" accept="image/*" ref="fileImg" @change="sendImg">
        <label for="fileImg" class="fa fa-picture-o" aria-hidden="true"></label>
      </div>
      <div class="send-msg">
        <textarea class="send-msg-input" placeholder="請輸入聊天內容" autofocus v-model="content" @keyup.13="sendText" ref="msgInput"></textarea>
        <a href="javascript:void(0)" class="send-msg-btn" @click="sendText">發送</a>
      </div>
    </div>
  </div>
</template>
<script>
import { mapState, mapMutations } from 'vuex'
import * as types from '../../store/mutation-types'

import msgItem from '@/components/msg-item'

export default {
  name: 'chat',
  components: { msgItem },
  data () {
    return {
      content: '',
      fileImg: null
    }
  },
  computed: {
    ...mapState({
      me: ({ users }) => users.me,
      users: ({ users }) => users.online.users,
      socket: ({ base }) => base.socket
    }),
    getMsgs () {
      const _self = this
      let msgs = []
      for (let user of _self.users) {
        if (user.userId != _self.$route.params.id) continue
        if (user.msg) msgs = user.msg
        user.noRead = 0
        break
      }

      /* eslint-disable */
      setTimeout(_self.scrollToBottom, 0)
      console.log('[Leo]getMsgs => ', msgs)
      return msgs
    }
  },
  methods: {
    ...mapMutations({
      addSendMsg: types.ADD_SEND_MSG
    }),
    // 讓瀏覽器滾動條保持在最低部
    scrollToBottom: function () {
      window.scrollTo(0, document.querySelectorAll('.list ul')[0].clientHeight)
      window.document.querySelectorAll('.list')[0].scrollTop = document.querySelectorAll('.list ul')[0].clientHeight
    },
    // 上傳圖片 <https://segmentfault.com/a/1190000004924160>
    sendImg (event) {
      let _vm = this
      let file = event.target.files[0] // 獲取圖片資源
      // 只選擇圖片文件
      if (!file.type.match('image.*')) {
        return false
      }
      let reader = new FileReader()
      reader.readAsDataURL(file)// 讀取文件
      // 渲染文件
      reader.onload = function (arg) {
        _vm.submit('img', arg.target.result)

        _vm.$refs.fileImg.files[0] = null
        _vm.$refs.msgInput.focus()
      }

      // TODO:上傳圖片
      _vm.uploadFile(file).then(res => {
        console.log('[Leo]圖片上傳成功 => ', res)
      }).catch(error => {
        console.error('[Leo]圖片上傳出錯 => ', error)
      })
    },
    // 提交聊天消息內容
    sendText () {
      const _vm = this
      if (_vm.content != '') {
        _vm.submit('text', _vm.content)
      } else {
        console.log('請輸入聊天內容')
      }
      _vm.$nextTick(function () {
        _vm.scrollToBottom()
        _vm.content = ''
        _vm.$refs.msgInput.focus()
      })
      return false
    },
    // 提交聊天消息內容
    submit (type, content) {
      const _vm = this
      let obj = {
        'from': {
          'userId': _vm.me.userId,
          'userName': _vm.me.userName
        },
        'to': {
          'userId': _vm.$route.params.id,
          'userName': _vm.$route.params.name
        },
        'msgType': type,
        'content': content,
        'sendtime': (new Date()).getTime()
      }
      _vm.addSendMsg(obj)
      _vm.socket.emit('message', obj)
    },
    /**
     * 上傳文件
     * @param file
     */
    uploadFile (file) {
      let formData = new FormData()
      // 把上傳的數據放入form_data
      formData.append('img', file)
      // 異步提交數據
      return fetch('url', {
        method: 'POST',
        body: formData
      })
    }
  },
  mounted () {
    const _self = this
    _self.$nextTick(function () {
      _self.scrollToBottom()
      _self.$refs.msgInput.focus()
    })
  }
}
</script>
<style scoped lang="scss" rel="stylesheet/scss">
input,
button,
select,
textarea {
  outline: none;
}

ul,
li {
  list-style: none;
}

.chat {
  position: absolute;
  top: 0;
  bottom: 0;
  right: 0;
  left: 0;
  box-sizing: border-box;
  overflow: hidden;
}

.list {
  padding: 10px;
  height: calc(100% - 100px - 40px);
  overflow-y: auto;
  overflow-x: hidden;
}

.send {
  position: relative;
  display: flex;
  flex-direction: column;

  &-bar {
    flex: 1;
    height: 40px;
    display: flex;
    justify-content: flex-start;
    align-items: center;
    background-color: #ffffff;

    .fa {
      padding: 10px 15px;
      cursor: pointer;
    }
  }

  &-msg {
    display: flex;
    flex: 1;
    height: 100px;
    overflow: hidden;
    box-shadow: 0 -1px 2px #efefef;
    background-color: #fff;

    &-input {
      flex: 1;
      padding: 0 10px;
      box-sizing: border-box;
      border: none;
      line-height: 30px;
      resize: none;
    }

    &-btn {
      display: inline-block;
      width: 100px;
      height: 100%;
      line-height: 100px;
      background-color: dodgerblue;
      text-align: center;
      text-decoration: none;
      color: #fff;
    }
  }
}
</style>

頁面效果沒有數據，應該是項目存在問題