JDHDB/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'] // 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: '/' })
      NProgress.done()
    } else {
      const hasPermits = store.getters.permits && store.getters.permits.length > 0
      if (hasPermits) {
        // 跳转首页但是没有首页
        if (from.path === '/' && to.path === '/404' || from.path === '/login' && to.path === '/404') {
          next({
            path: store.state.permission.addRoutes[0].path,
            replace: true
          })
          NProgress.done()
          return
        }
        next()
      } else {
        // 如果没有获取到vuex中到name
        try {
          // get permits
          const permits = await store.dispatch('user/getRoute')
          // generate accessible routes mapLayer based on permits
          if (store.getters.permits && store.getters.permits.length < 1) {
            Message.error('无访问权限，请联系管理员！')
            await store.dispatch('user/resetToken')
            next(`/login?redirect=${to.path}`)
            NProgress.done()
            return
          }
          const accessRoutes = await store.dispatch('permission/generateRoutes', permits)
          // dynamically add accessible routes
          router.addRoutes(accessRoutes)
          // 跳转首页但是没有首页
          if (from.path === '/' && to.path === '/404' || from.path === '/login' && to.path === '/404') {
            next({
              path: accessRoutes[0].path,
              replace: true
            })
            NProgress.done()
            return
          }
          next({
            ...to,
            replace: true
          }) // hack方法 确保addRoutes已完成 ,set the replace
        } catch (error) {
          // remove token and go to login page to re-login
          await store.dispatch('user/resetToken')
          Message.error(error || 'Has Error')
          next(`/login?redirect=${to.path}`)
          NProgress.done()
        }
      }
    }
  } else {
    /* has no token*/
    console.log('hasNoToken')
    if (whiteList.indexOf(to.path) !== -1) {
      // in the free login whitelist, go directly
      console.log('whiteList-next')
      next()
    } else {
      // other pages that do not have permission to access are redirected to the login page.
      // next(`/login?redirect=${to.path}`)
      next(`/login`)
      NProgress.done()
    }
  }
})

router.afterEach(() => {
  // finish progress bar
  NProgress.done()
})