5.4 权限管理前端开发

5.4.1 src/components

新建ParentView文件夹，并在文件夹中新建index.vue文件。

并在index.vue中加入以下内容：

<template>
  <router-view />
</template>

5.4.2 layout/components/Sidebar/index.vue

    routes() {
      // return this.$router.options.routes
      //新增内容
      return this.$router.options.routes.concat(global.antRouter)
    },

5.4.3 router

在index.js中只留以下内容：

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

Vue.use(Router)

/* Layout */
import Layout from '@/layout'

/**
 * Note: sub-menu only appear when route children.length >= 1
 * Detail see: https://panjiachen.github.io/vue-element-admin-site/guide/essentials/router-and-nav.html
 *
 * hidden: true                   if set true, item will not show in the sidebar(default is false)
 * alwaysShow: true               if set true, will always show the root menu
 *                                if not set alwaysShow, when item has more than one children route,
 *                                it will becomes nested mode, otherwise not show the root menu
 * redirect: noRedirect           if set noRedirect will no redirect in the breadcrumb
 * name:'router-name'             the name is used by <keep-alive> (must set!!!)
 * meta : {
    roles: ['admin','editor']    control the page roles (you can set multiple roles)
    title: 'title'               the name show in sidebar and breadcrumb (recommend set)
    icon: 'svg-name'/'el-icon-x' the icon show in the sidebar
    breadcrumb: false            if set false, the item will hidden in breadcrumb(default is true)
    activeMenu: '/example/list'  if set path, the sidebar will highlight the path you set
  }
 */

/**
 * constantRoutes
 * a base page that does not have permission requirements
 * all roles can be accessed
 */
export const constantRoutes = [
  {
    path: '/login',
    component: () => import('@/views/login/index'),
    hidden: true
  },

  {
    path: '/',
    component: Layout,
    redirect: '/dashboard',
    children: [{
      path: 'dashboard',
      name: 'Dashboard',
      component: () => import('@/views/dashboard/index'),
      meta: { title: 'Dashboard', icon: 'dashboard' }
    }]
  }

  // {
  //   path: '/system',
  //   component: Layout,
  //   meta: {
  //     title: '系统管理',
  //     icon: 'el-icon-s-tools'
  //   },
  //   alwaysShow: true,
  //   children: [
  //     {
  //       name: 'sysUser',
  //       path: 'sysUser',
  //       component: () => import('@/views/system/sysUser/list'),
  //       meta: {
  //         title: '用户管理',
  //         icon: 'el-icon-s-custom'
  //       },
  //     },
  //     {
  //       path: 'sysRole',
  //       component: () => import('@/views/system/sysRole/list'),
  //       meta: {
  //         title: '角色管理',
  //         icon: 'el-icon-s-help'
  //       },
  //     },
  //     {
  //       name: 'sysMenu',
  //       path: 'sysMenu',
  //       component: () => import('@/views/system/sysMenu/list'),
  //       meta: {
  //         title: '菜单管理',
  //         icon: 'el-icon-s-unfold'
  //       },
  //     },
  //     {
  //       path: 'assignAuth',
  //       component: () => import('@/views/system/sysMenu/assignAuth'),
  //       meta: {
  //         activeMenu: '/system/sysRole',
  //         title: '角色授权'
  //       },
  //       hidden: true,
  //     }
  //   ]
  // },

  // {
  //   path: '/form',
  //   component: Layout,
  //   children: [
  //     {
  //       path: 'index',
  //       name: 'Form',
  //       component: () => import('@/views/form/index'),
  //       meta: { title: 'Form', icon: 'form' }
  //     }
  //   ]
  // },

  // {
  //   path: '/nested',
  //   component: Layout,
  //   redirect: '/nested/menu1',
  //   name: 'Nested',
  //   meta: {
  //     title: 'Nested',
  //     icon: 'nested'
  //   },
  //   children: [
  //     {
  //       path: 'menu1',
  //       component: () => import('@/views/nested/menu1/index'), // Parent router-view
  //       name: 'Menu1',
  //       meta: { title: 'Menu1' },
  //       children: [
  //         {
  //           path: 'menu1-1',
  //           component: () => import('@/views/nested/menu1/menu1-1'),
  //           name: 'Menu1-1',
  //           meta: { title: 'Menu1-1' }
  //         },
  //         {
  //           path: 'menu1-2',
  //           component: () => import('@/views/nested/menu1/menu1-2'),
  //           name: 'Menu1-2',
  //           meta: { title: 'Menu1-2' },
  //           children: [
  //             {
  //               path: 'menu1-2-1',
  //               component: () => import('@/views/nested/menu1/menu1-2/menu1-2-1'),
  //               name: 'Menu1-2-1',
  //               meta: { title: 'Menu1-2-1' }
  //             },
  //             {
  //               path: 'menu1-2-2',
  //               component: () => import('@/views/nested/menu1/menu1-2/menu1-2-2'),
  //               name: 'Menu1-2-2',
  //               meta: { title: 'Menu1-2-2' }
  //             }
  //           ]
  //         },
  //         {
  //           path: 'menu1-3',
  //           component: () => import('@/views/nested/menu1/menu1-3'),
  //           name: 'Menu1-3',
  //           meta: { title: 'Menu1-3' }
  //         }
  //       ]
  //     },
  //     {
  //       path: 'menu2',
  //       component: () => import('@/views/nested/menu2/index'),
  //       name: 'Menu2',
  //       meta: { title: 'menu2' }
  //     }
  //   ]
  // },

  // {
  //   path: 'external-link',
  //   component: Layout,
  //   children: [
  //     {
  //       path: 'https://panjiachen.github.io/vue-element-admin-site/#/',
  //       meta: { title: 'External Link', icon: 'link' }
  //     }
  //   ]
  // },

  // // 404 page must be placed at the end !!!
  // { path: '*', redirect: '/404', hidden: true }
]

const createRouter = () => new Router({
  // mode: 'history', // require service support
  scrollBehavior: () => ({ y: 0 }),
  routes: constantRoutes
})

const router = createRouter()

// Detail see: https://github.com/vuejs/vue-router/issues/1234#issuecomment-357941465
export function resetRouter() {
  const newRouter = createRouter()
  router.matcher = newRouter.matcher // reset router
}

export default router

新建_import_development.js 和_import_production.js 两个文件。

//_import_development.js
module.exports = file => require('@/views/' + file + '.vue').default

//_import_production.js
module.exports = file => () => import('@/views/' + file + '.vue')

5.4.4 store/modules/user.js

const getDefaultState = () => {
  return {
    token: getToken(),
    name: '',
    avatar: '',

    buttons: [],//新增
    menus: ''//新增
  }
}

const mutations = {
  RESET_STATE: (state) => {
    Object.assign(state, getDefaultState())
  },
  SET_TOKEN: (state, token) => {
    state.token = token
  },
  SET_NAME: (state, name) => {
    state.name = name
  },
  SET_AVATAR: (state, avatar) => {
    state.avatar = avatar
  },

//新增
  SET_BUTTONS: (state, buttons) => {
    state.buttons = buttons
  },
  //新增
  SET_MENUS: (state, menus) => {
    state.menus = menus
  }
}

  // get user info
  getInfo({ commit, state }) {
    return new Promise((resolve, reject) => {
      getInfo(state.token).then(response => {
        const { data } = response

        if (!data) {
          return reject('Verification failed, please Login again.')
        }

        const { name, avatar } = data

        commit('SET_NAME', name)
        commit('SET_AVATAR', avatar)

		//新增
        commit('SET_BUTTONS', data.buttons)
        //新增
        commit('SET_MENUS', data.routers)

        resolve(data)
      }).catch(error => {
        reject(error)
      })
    })
  },

5.4.5 store/getter.js

const getters = {
  sidebar: state => state.app.sidebar,
  device: state => state.app.device,
  token: state => state.user.token,
  avatar: state => state.user.avatar,
  name: state => state.user.name,

  //新增
  buttons: state => state.user.buttons,
  //新增
  menus: state => state.user.menus
}
export default getters

5.4.6 utils

在utils中新建文件夹btn-permission.js。

//btn-permission.js
import store from '@/store'

/**
 * 判断当前用户是否有此按钮权限
 * 按钮权限字符串 permission
 */
export default function hasBtnPermission(permission) {
  // 得到当前用户的所有按钮权限
  const myBtns = store.getters.buttons
  // 如果指定的功能权限在myBtns中, 返回true ==> 这个按钮就会显示, 否则隐藏
  return myBtns.indexOf(permission) !== -1
}

修改request.js:

  config => {
    // do something before request is sent

    if (store.getters.token) {
      // let each request carry token
      // ['X-Token'] is a custom headers key
      // please modify it according to the actual situation

	  //将x-token修改为token
      config.headers['token'] = getToken()
    }
    return config
  },

5.4.7 views/login/index.vue

用户名和密码只检查长度：

    const validateUsername = (rule, value, callback) => {
      if (value.length < 4) {
        callback(new Error('Please enter the correct user name'))
      } else {
        callback()
      }
    }

    const validatePassword = (rule, value, callback) => {
      if (value.length < 6) {
        callback(new Error('The password can not be less than 6 digits'))
      } else {
        callback()
      }
    }

5.4.8 main.js

// 新增
import hasBtnPermission from '@/utils/btn-permission'
Vue.prototype.$hasBP = hasBtnPermission

import formCreate from '@form-create/element-ui'
import FcDesigner from '@form-create/designer'
Vue.use(formCreate)
Vue.use(FcDesigner)

5.4.9 permission.js

替换为下面的内容：

import router from './router'
import store from './store'
import { getToken } from '@/utils/auth'
import { Message } from 'element-ui'
import NProgress from 'nprogress' // 水平进度条提示: 在跳转路由时使用
import 'nprogress/nprogress.css' // 水平进度条样式
import getPageTitle from '@/utils/get-page-title' // 获取应用头部标题的函数
import Layout from '@/layout'
import ParentView from '@/components/ParentView'
const _import = require('./router/_import_' + process.env.NODE_ENV) // 获取组件的方法

NProgress.configure({ showSpinner: false }) // NProgress Configuration
const whiteList = ['/login'] // no redirect whitelist
router.beforeEach(async(to, from, next) => {
  NProgress.start()
  // set page title
  document.title = getPageTitle(to.meta.title)
  // determine whether the user has logged in
  const hasToken = getToken()
  if (hasToken) {
    if (to.path === '/login') {
      // if is logged in, redirect to the home page
      next({ path: '/' })
      NProgress.done()
    } else {
      const hasGetUserInfo = store.getters.name
      if (hasGetUserInfo) {
        next()
      } else {
        try {
          // get user info
          await store.dispatch('user/getInfo')// 请求获取用户信息
          if (store.getters.menus.length < 1) {
            global.antRouter = []
            next()
          }
          const menus = filterAsyncRouter(store.getters.menus)// 1.过滤路由
          console.log(menus)
          router.addRoutes(menus) // 2.动态添加路由
          const lastRou = [{ path: '*', redirect: '/404', hidden: true }]
          router.addRoutes(lastRou)
          global.antRouter = menus // 3.将路由数据传递给全局变量，做侧边栏菜单渲染工作
          next({
            ...to,
            replace: true
          })
          // next()
        } catch (error) {
          // remove token and go to login page to re-login
          console.log(error)
          await store.dispatch('user/resetToken')
          Message.error(error || 'Has Error')
          next(`/login?redirect=${to.path}`)
          NProgress.done()
        }
      }
    }
  } else { /* has no token*/
    if (whiteList.indexOf(to.path) !== -1) {
      // in the free login whitelist, go directly
      next()
    } else {
      // other pages that do not have permission to access are redirected to the login page.
      next(`/login?redirect=${to.path}`)
      NProgress.done()
    }
  }
})

router.afterEach(() => { // finish progress bar
  NProgress.done()
}) // // 遍历后台传来的路由字符串，转换为组件对象
function filterAsyncRouter(asyncRouterMap) {
  const accessedRouters = asyncRouterMap.filter(route => {
    if (route.component) {
      if (route.component === 'Layout') {
        route.component = Layout
      } else if (route.component === 'ParentView') {
        route.component = ParentView
      } else {
        try {
          route.component = _import(route.component)// 导入组件
        } catch (error) {
          debugger
          console.log(error)
          route.component = _import('dashboard/index')// 导入组件
        }
      }
    }
    if (route.children && route.children.length > 0) {
      route.children = filterAsyncRouter(route.children)
    } else {
      delete route.children
    }
    return true
  })
  return accessedRouters
}

5.4.10 按钮权限控制

在写按钮时按照如下写法即可：

<el-button type="danger" icon="el-icon-delete" size="mini" @click="removeDataById(scope.row.id)" title="删除" :disable="$hasBP('bnt.sysUser.remove')===false"/>