web/src/permission.js

import router from './router'
import store from './store'
import {Message} from 'element-ui'
import NProgress from 'nprogress' // progress bar
import 'nprogress/nprogress.css' // progress bar style
import {getToken} from '@/utils/auth' // get token from cookie
import getPageTitle from '@/utils/get-page-title'

NProgress.configure({showSpinner: false}) // NProgress Configuration

const whiteList = ['/login', '/auth-redirect','/dashboard-screen', '/login1'] // no redirect whitelist

router.beforeEach(async(to, from, next) => {
  // start progress bar
  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: '/dashboard-screen'})
      NProgress.done() // hack: https://github.com/PanJiaChen/vue-element-admin/pull/2939
    }
    // if (to.path === '/index') {
    //   // if is logged in, redirect to the home page
    //   next({path: '/dashboard-screen'})
    //   NProgress.done() // hack: https://github.com/PanJiaChen/vue-element-admin/pull/2939
    // }
    else {
      // determine whether the user has obtained his permission roles through getInfo
      const isInfo = store.getters.isInfo
      if (isInfo) {
        next()
      } else {
        try {
          // get user info
          // note: roles must be a object array! such as: ['admin'] or ,['developer','editor']
          const {pages} = await store.dispatch('user/getInfo')
          // generate accessible routes map based on roles
          const accessRoutes = await store.dispatch('permission/generateRoutes', pages)
          // dynamically add accessible routes
          router.addRoutes(accessRoutes)

          // hack method to ensure that addRoutes is complete
          // set the replace: true, so the navigation will not leave a history record
          next({...to, replace: true})
        } catch (error) {
          // remove token and go to login page to re-login
          await store.dispatch('user/resetToken')
          Message.error(error || 'Has Error')
          next(`/dashboard-screen`)
          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()
})