vue--管理后台手把手搭建-----(4)

在项目的入口文件写路由导航钩子,进入路由的时候判断当前是否有token,进行判断在管理后台手把手搭建(1)的时候已经详细介绍:代码如下

 

import router from './router'
import store from './store'
import NProgress from 'nprogress' // progress bar
import 'nprogress/nprogress.css'// progress bar style
import { getToken } from '@/utils/auth' // getToken from cookie
NProgress.configure({ showSpinner: false })// NProgress Configuration  禁用进度环
const whiteList = ['/login']// 白名单
router.beforeEach((to, from, next) => {
  NProgress.start() // start progress bar
  if (getToken()) { // determine if there has token
    /* has token*/
    if (to.path === '/login') { 
      next({ path: '/' })
      NProgress.done() 
    } else {
      if (store.getters.roles.length === 0) { // 判断当前用户是否已拉取完user_info信息
        store.dispatch('GetUserInfo').then(res => { 
          const roles = res.data.content.roles           
          store.dispatch('GenerateRoutes', { roles }).then(() => {                     router.addRoutes(store.getters.addRouters)  // 动态添加可访问路由表  
            next({ ...to, replace: true }) // hack方法 确保addRoutes已完成 ,set the replace: true so the navigation will not leave a history record
          })
        }).catch(() => {
          //拉取用户信息超时或者500
          store.dispatch('FedLogOut').then(() => {
            next({ path: '/login' })
          })
        })
      } else {
        next()
      }
    }
  }
  else {
    /* has no token*/
    if (whiteList.indexOf(to.path) !== -1) { // 在免登录白名单,直接进入
      next()
    } else {
      next('/login') // 否则全部重定向到登录页
      NProgress.done() // if current page is login will not trigger afterEach hook, so manually handle it
    }
  }
})

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

权限写完了,我们开始页面的渲染吧

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