VUE动态权限控制（二）--------前端

水深无声 2022-04-10 06:27 825阅读 0赞

接着上一篇看下VUE动态权限控制的前端实现。

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dfdF95X3k_size_16_color_FFFFFF_t_70][]

总述：App.vue与main.js为入口，api为接口，router为路由，store为全局常（变）量，views为页面。

一、环境配置config：

1、index.js:

'use strict'
    // Template version: 1.2.6
    // see http://vuejs-templates.github.io/webpack for documentation.
    
    const path = require('path')
    
    module.exports = {
      dev: {
    
        // Paths
        assetsSubDirectory: 'static',
        assetsPublicPath: '/',
        proxyTable: {},
    
        // Various Dev Server settings
        host: 'localhost', // can be overwritten by process.env.HOST
        port: 9528, // can be overwritten by process.env.PORT, if port is in use, a free one will be determined
        autoOpenBrowser: true,
        errorOverlay: true,
        notifyOnErrors: false,
        poll: false, // https://webpack.js.org/configuration/dev-server/#devserver-watchoptions-
    
        // Use Eslint Loader?
        // If true, your code will be linted during bundling and
        // linting errors and warnings will be shown in the console.
        useEslint: true,
        // If true, eslint errors and warnings will also be shown in the error overlay
        // in the browser.
        showEslintErrorsInOverlay: false,
    
        /**
         * Source Maps
         */
    
        // https://webpack.js.org/configuration/devtool/#development
        devtool: 'cheap-source-map',
    
        // If you have problems debugging vue-files in devtools,
        // set this to false - it *may* help
        // https://vue-loader.vuejs.org/en/options.html#cachebusting
        cacheBusting: true,
    
        // CSS Sourcemaps off by default because relative paths are "buggy"
        // with this option, according to the CSS-Loader README
        // (https://github.com/webpack/css-loader#sourcemaps)
        // In our experience, they generally work as expected,
        // just be aware of this issue when enabling this option.
        cssSourceMap: false,
      },
    
      build: {
        // Template for index.html
        index: path.resolve(__dirname, '../dist/index.html'),
    
        // Paths
        assetsRoot: path.resolve(__dirname, '../dist'),
        assetsSubDirectory: 'static',
    
        /**
         * You can set by youself according to actual condition
         * You will need to set this if you plan to deploy your site under a sub path,
         * for example GitHub pages. If you plan to deploy your site to https://foo.github.io/bar/,
         * then assetsPublicPath should be set to "/bar/".
         * In most cases please use '/' !!!
         */
        assetsPublicPath: '/vueAdmin-template/', // If you are deployed on the root path, please use '/'
    
        /**
         * Source Maps
         */
    
        productionSourceMap: false,
        // https://webpack.js.org/configuration/devtool/#production
        devtool: '#source-map',
    
        // Gzip off by default as many popular static hosts such as
        // Surge or Netlify already gzip all static assets for you.
        // Before setting to `true`, make sure to:
        // npm install --save-dev compression-webpack-plugin
        productionGzip: false,
        productionGzipExtensions: ['js', 'css'],
    
        // Run the build command with an extra argument to
        // View the bundle analyzer report after build finishes:
        // `npm run build --report`
        // Set to `true` or `false` to always turn it on or off
        bundleAnalyzerReport: process.env.npm_config_report
      }
    }

2、开发环境dev.env.js：

'use strict'
    const merge = require('webpack-merge')
    const prodEnv = require('./prod.env')
    
    module.exports = merge(prodEnv, {
      NODE_ENV: '"development"',
      BASE_API: '"http://localhost:8080/usermanager/"',
    })

3、生产环境prod.env.js：

'use strict'
    module.exports = {
      NODE_ENV: '"production"',
      BASE_API: '"http://localhost:8080/usermanager/"',
    }

配置后，执行npm run dev命令，则是启动测试环境；执行npm run build则是启动正式环境。

二、准备工作：

1、封装utils：

（1）auth.js：

import Cookies from 'js-cookie'
    
    const TokenKey = 'Admin-Token'
    
    export function getToken() {
      return Cookies.get(TokenKey)
    }
    
    export function setToken(token) {
      return Cookies.set(TokenKey, token)
    }
    
    export function removeToken() {
      return Cookies.remove(TokenKey)
    }

（2）request.js  ajax请求util：

import axios from 'axios'
    // 配置session跨域
    axios.defaults.withCredentials = true
    import { Message, MessageBox } from 'element-ui'
    import store from '../store'
    import { getToken } from '@/utils/auth'
    
    // 创建axios实例
    const service = axios.create({
      baseURL: process.env.BASE_API, // api的base_url
      timeout: 5000 // 请求超时时间
    })
    
    // request拦截器
    service.interceptors.request.use(config => {
      if (store.getters.token) {
        config.headers['X-Token'] = getToken() // 让每个请求携带自定义token 请根据实际情况自行修改
      }
      return config
    }, error => {
      // Do something with request error
      console.log(error) // for debug
      Promise.reject(error)
    })
    
    // respone拦截器
    service.interceptors.response.use(
      response => {
      /**
      * code为非20000是抛错 可结合自己业务进行修改
      */
        const res = response.data
        if (res.code !== 200) {
          Message({
            message: res.message,
            type: 'error',
            duration: 5 * 1000
          })
    
          // 50008:非法的token; 50012:其他客户端登录了;  50014:Token 过期了;
          if (res.code === 50008 || res.code === 50012 || res.code === 50014) {
            MessageBox.confirm('你已被登出，可以取消继续留在该页面，或者重新登录', '确定登出', {
              confirmButtonText: '重新登录',
              cancelButtonText: '取消',
              type: 'warning'
            }).then(() => {
              store.dispatch('FedLogOut').then(() => {
                location.reload()// 为了重新实例化vue-router对象 避免bug
              })
            })
          }
          return Promise.reject('error')
        } else {
          return response.data
        }
      },
      error => {
        console.log('err' + error)// for debug
        Message({
          message: error.message,
          type: 'error',
          duration: 5 * 1000
        })
        return Promise.reject(error)
      }
    )
    
    export default service

2、接口api：

import request from '@/utils/request'
    
    export function login(userName, pwd) {
      return request({
        url: '/home/login',
        method: 'post',
        params: {
          userName,
          pwd
        }
      })
    }
    
    export function getInfo(token) {
      return request({
        url: '/user/getUserRoles',
        method: 'get'
      })
    }
    
    export function logout() {
      return request({
        url: '/user/logout',
        method: 'post'
      })
    }
    
    // 获取用户姓名
    export function getUserName(token) {
      return request({
        url: '/user/getUserName',
        method: 'get'
      })
    }

3、路由：

import Vue from 'vue'
    import Router from 'vue-router'
    
    // in development-env not use lazy-loading, because lazy-loading too many pages will cause webpack hot update too slow. so only in production use lazy-loading;
    // detail: https://panjiachen.github.io/vue-element-admin-site/#/lazy-loading
    
    Vue.use(Router)
    
    /* Layout */
    import Layout from '../views/layout/Layout'
    
    export const constantRouterMap = [
      { path: '/404', component: () => import('@/views/404'), hidden: true },
      { path: '/login', component: () => import('@/views/login/index'), hidden: true },
      {
        path: '/',
        component: Layout,
        redirect: '/dashboard',
        name: '首页',
        icon: '首页',
        hidden: true,
        children: [{
          path: '/dashboard',
          component: () => import('@/views/dashboard/index')
        }]
      }
    ]
    /**
    * hidden: true                   if `hidden:true` will not show in the sidebar(default is false)
    * alwaysShow: true               if set true, will always show the root menu, whatever its child routes length
    *                                if not set alwaysShow, only more than one route under the children
    *                                it will becomes nested mode, otherwise not show the root menu
    * redirect: noredirect           if `redirect:noredirect` will no redirct in the breadcrumb
    * name:'router-name'             the name is used by <keep-alive> (must set!!!)
    * meta : {
        title: 'title'               the name show in submenu and breadcrumb (recommend set)
        icon: 'svg-name'             the icon show in the sidebar,
      }
    **/
    export const asyncRouterMap = [
      // { path: '/login', component: () => import('@/views/login/index'), hidden: true },
      {
        path: '/module',
        redirct: '/module/index',
        name: 'module',
        component: Layout,
        meta: { title: '测试', authority: ['wtyy-cs'] },
        noDropdown: true,
        children: [
          {
            path: 'index',
            name: 'index',
            component: () => import('@/views/module/index'),
            meta: { title: '测试首页', authority: ['wtyy-cs'], keepAlive: false }
          },
          {
            path: 'detail',
            name: 'detail',
            // hidden: true,
            component: () => import('@/views/module/detail'),
            meta: { title: '测试详情', authority: ['wtyy-cs'], keepAlive: false }
          }
        ]
      },
      {
        path: '/table',
        redirct: '/table/index',
        name: 'table',
        component: Layout,
        meta: { title: 'table页', authority: ['wtyy-table'] },
        noDropdown: true,
        children: [
          {
            path: 'index',
            name: 'index',
            component: () => import('@/views/table/index'),
            meta: { title: 'table首页', authority: ['wtyy-table'], keepAlive: false }
          }
        ]
      }
    
    ]
    
    export default new Router({
      // mode: 'history', // 后端支持可开
      scrollBehavior: () => ({ y: 0 }),
      routes: constantRouterMap
    })

4、store：

（1）app.js：

import Cookies from 'js-cookie'
    
    const app = {
      state: {
        sidebar: {
          opened: !+Cookies.get('sidebarStatus'),
          withoutAnimation: false
        },
        device: 'desktop'
      },
      mutations: {
        TOGGLE_SIDEBAR: state => {
          if (state.sidebar.opened) {
            Cookies.set('sidebarStatus', 1)
          } else {
            Cookies.set('sidebarStatus', 0)
          }
          state.sidebar.opened = !state.sidebar.opened
          state.sidebar.withoutAnimation = false
        },
        CLOSE_SIDEBAR: (state, withoutAnimation) => {
          Cookies.set('sidebarStatus', 1)
          state.sidebar.opened = false
          state.sidebar.withoutAnimation = withoutAnimation
        },
        TOGGLE_DEVICE: (state, device) => {
          state.device = device
        }
      },
      actions: {
        ToggleSideBar: ({ commit }) => {
          commit('TOGGLE_SIDEBAR')
        },
        CloseSideBar({ commit }, { withoutAnimation }) {
          commit('CLOSE_SIDEBAR', withoutAnimation)
        },
        ToggleDevice({ commit }, device) {
          commit('TOGGLE_DEVICE', device)
        }
      }
    }
    
    export default app

（2）permission.js：

import { asyncRouterMap, constantRouterMap } from '@/router/index'
    
    /**
     * 通过meta.authority判断是否与当前用户权限匹配
     * @param authorities
     * @param route
     */
    function hasPermission(authorities, route) {
      if (route.meta && route.meta.authority) {
        return authorities.some(authority => route.meta.authority.indexOf(authority) >= 0)
      } else {
        return true
      }
    }
    
    /**
     * 递归过滤异步路由表，返回符合用户角色权限的路由表
     * @param asyncRouterMap
     * @param authorities
     */
    function filterAsyncRouter(asyncRouterMap, authorities) {
      const accessedRouters = asyncRouterMap.filter(route => {
        if (hasPermission(authorities, route)) {
          if (route.children && route.children.length) {
            route.children = filterAsyncRouter(route.children, authorities)
          }
          return true
        }
        return false
      })
      return accessedRouters
    }
    
    const permission = {
      state: {
        routers: constantRouterMap,
        addRouters: []
      },
      mutations: {
        SET_ROUTERS: (state, routers) => {
          state.addRouters = routers
          state.routers = constantRouterMap.concat(routers)
        }
      },
      actions: {
        GenerateRoutes({ commit }, data) {
          return new Promise(resolve => {
            const { authorities } = data
            let accessedRouters
            if (authorities.indexOf('admin') >= 0) {
              accessedRouters = asyncRouterMap
            } else {
              accessedRouters = filterAsyncRouter(asyncRouterMap, authorities)
            }
    
            commit('SET_ROUTERS', accessedRouters)
            resolve()
          })
        }
      }
    }
    
    export default permission

constantRouterMap为固定的路由，登录进来都可以看得到的，asyncRouterMap为动态路由，在后端可配置。

（3）用户相关user.js：

import { login, logout, getInfo, getUserName } from '@/api/login'
    import { getToken, setToken, removeToken } from '@/utils/auth'
    
    const user = {
      state: {
        token: getToken(),
        name: '',
        avatar: '',
        roles: []
      },
    
      mutations: {
        SET_TOKEN: (state, token) => {
          state.token = token
        },
        SET_NAME: (state, name) => {
          state.name = name
        },
        SET_AVATAR: (state, avatar) => {
          state.avatar = avatar
        },
        SET_ROLES: (state, roles) => {
          state.roles = roles
        }
      },
    
      actions: {
        // 登录
        Login({ commit }, user) {
          const userName = user.userName
          const pwd = user.password
          return new Promise((resolve, reject) => {
            login(userName, pwd).then(response => {
              const data = response.data
              setToken(data.token)
              commit('SET_TOKEN', data.token)
              resolve()
            }).catch(error => {
              reject(error)
            })
          })
        },
    
        // 获取用户权限信息
        GetInfo({ commit, state }) {
          return new Promise((resolve, reject) => {
            getInfo(state.token).then(response => {
              console.info('res' + response)
              const data = response.data
    
              if (data && data.length > 0) { // 验证返回的roles是否是一个非空数组
                commit('SET_ROLES', data)
              } else {
                reject('getInfo: roles must be a non-null array !')
              }
    
              resolve(response)
            }).catch(error => {
              reject(error)
            })
          })
        },
    
        // 拉取用户姓名GetUserName
        GetUserName({ commit, state }) {
          return new Promise((resolve, reject) => {
            getUserName(state.token).then(response => {
              console.info('姓名res' + response.data)
              const data = response.data
              commit('SET_NAME', data)
    
              resolve(response)
            }).catch(error => {
              reject(error)
            })
          })
        },
    
        // 登出
        LogOut({ commit, state }) {
          return new Promise((resolve, reject) => {
            logout(state.token).then(() => {
              commit('SET_TOKEN', '')
              commit('SET_ROLES', [])
              removeToken()
              resolve()
            }).catch(error => {
              reject(error)
            })
          })
        },
    
        // 前端 登出
        FedLogOut({ commit }) {
          return new Promise(resolve => {
            commit('SET_TOKEN', '')
            removeToken()
            resolve()
          })
        }
      }
    }
    
    export default user

用户具有的全局属性：token登录标志（值为后端的sessionId）、name用户名、roles权限（数组）。

三、入口分析：

1、入口main.js文件：

import Vue from 'vue'
    
    import 'normalize.css/normalize.css'// A modern alternative to CSS resets
    
    import ElementUI from 'element-ui'
    import 'element-ui/lib/theme-chalk/index.css'
    import locale from 'element-ui/lib/locale/lang/zh-CN' // lang i18n
    
    import '@/styles/index.scss' // global css
    import App from './App'
    import router from './router'
    import store from './store'
    import '@/icons' // icon
    import '@/permission' // permission control
    import VueJsonp from 'vue-jsonp'
    
    Vue.use(VueJsonp)
    
    Vue.use(ElementUI, { locale })
    
    Vue.config.productionTip = false
    
    new Vue({
      el: '#app',
      router,
      store,
      render: h => h(App)
    })

可以看到用到了我们自定义的permission，所以在一开始就会读取permission.js：

2、permission.js：

import router from './router'
    import store from './store'
    import NProgress from 'nprogress' // Progress 进度条
    import 'nprogress/nprogress.css'// Progress 进度条样式
    import { Message } from 'element-ui'
    import { getToken } from '@/utils/auth' // 验权
    
    const whiteList = ['/login'] // 不重定向白名单
    router.beforeEach((to, from, next) => {
      NProgress.start()
    
      if (getToken()) {
        if (to.path === '/login') {
          next({ path: '/' })
          NProgress.done() // if current page is dashboard will not trigger	afterEach hook, so manually handle it
        } else {
          if (store.getters.roles.length === 0) {
            // 1、拉取用户姓名
            store.dispatch('GetUserName').then(res => {
    
            })
    
            // 2、拉取用户权限信息
            store.dispatch('GetInfo').then(res => {
              // 从后端获取的权限
              const authorities = res.data
    
              // 前端路由加载动态权限
              store.dispatch('GenerateRoutes', { authorities }).then(() => { // 生成可访问的路由表
                // alert('store.getters.addRouters' + store.getters.addRouters.length)
                router.addRoutes(store.getters.addRouters)// 添加动态路由
    
                next({ ...to })// hack方法 确保addRoutes已完成
              })
            }).catch((err) => {
              store.dispatch('FedLogOut').then(() => {
                Message.error(err || 'Verification failed, please login again')
                next({ path: '/' })
              })
            })
          } else {
            next()
          }
        }
      } else {
        if (whiteList.indexOf(to.path) !== -1) {
          next()
        } else {
          next('/login')
          NProgress.done()
        }
      }
    })
    
    router.afterEach(() => {
      NProgress.done() // 结束Progress
    })

没有token，说明没有登录过，判断访问路径是否在白名单内，在则跳转，不在则跳转到登录页面；

有token，说明登录过，访问路径如果是登录，则跳转到首页；否则判断是否有权限（roles数组是否为空），有则直接跳转，否则调用store拉取用户基本信息，包括用户名和权限。

三、页面：

![2018122814590632.png][]

1、dashboard/index：

<template>
      <div class="dashboard-container">
        <div class="dashboard-text">name:{
       {name}}</div>
        <div class="dashboard-text">roles:<span v-for='role in roles' :key='role'>{
       {role}}</span></div>
      </div>
    </template>
    
    <script>
    import { mapGetters } from 'vuex'
    
    export default {
      name: 'dashboard',
      computed: {
        ...mapGetters([
          'name',
          'roles'
        ])
      }
    }
    </script>
    
    <style rel="stylesheet/scss" lang="scss" scoped>
    .dashboard {
      &-container {
        margin: 30px;
      }
      &-text {
        font-size: 30px;
        line-height: 46px;
      }
    }
    </style>

2、login/index：

<template>
    	<el-form label-width="500px" class="demo-ruleForm loginform" align="center">
    		<el-form-item label="用户名">
    			<el-input v-model="user.userName"></el-input>
    		</el-form-item>
     
    		<el-form-item label="密    码" prop="pass">
    			<el-input v-model="user.password" type="password" auto-complete="off"></el-input>
    		</el-form-item>
     
    		<el-form-item size="large">
    			<el-button type="primary" @click="login()">登录</el-button>
    			<el-button>取消</el-button>
    		</el-form-item>
    	</el-form>
    </template>
    
    
    <script>
    import { login } from '@/api/login'
    import { getToken, setToken, removeToken } from '@/utils/auth'
    export default {
    
      data() {
        return {
          user: {
    	      userName: '',
            password: ''
          }
    
        }
      },
    
      methods: {
    
        login() {
          this.$store.dispatch('Login', this.user).then(() => {
            this.$router.push({ path: '/' })
          })
        }
      }
    }
    </script>
    
    
    <style>
    	.loginform {
    		float: left;
    		margin: auto;
    	}
    </style>

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dfdF95X3k_size_16_color_FFFFFF_t_70]: /images/20220402/ec27f887fcea426d8eabaf9d82eb3e67.png
[2018122814590632.png]: /images/20220402/3b60dca4e2ea435ea423f7d862743873.png