src/permission.js

import router from './router'
import store from './store'
import { Message } from 'element-ui'
import { getToken } from '@/utils/auth'
import { isRelogin } from '@/utils/request'
import NProgress from 'nprogress'
import 'nprogress/nprogress.css'
NProgress.configure({ showSpinner: false })
const whiteList = ['/login', '/register']
router.beforeEach((to, from, next) => {
    NProgress.start()
    if (getToken()) {
        /* has token*/
        if (to.path === '/login') {
            next({ path: '/' })
            NProgress.done()
        } else if (whiteList.indexOf(to.path) !== -1) {
            next()
        } else {
            if (store.getters.roles.length === 0) {
                isRelogin.show = true
                // 判断当前用户是否已拉取完user_info信息
                store.dispatch('GetInfo').then((res) => {
                    isRelogin.show = false
                    store.dispatch('generateRoutes', res).then(accessRoutes => {
                        // 根据roles权限生成可访问的路由表
                        router.addRoutes(accessRoutes) // 动态添加可访问路由表
                        next({ ...to, replace: true }) // hack方法 确保addRoutes已完成
                    })
                }).catch(err => {
                    store.dispatch('LogOut').then(() => {
                        Message.error(err)
                        next({ path: '/login' })
                    })
                })
            } else {
                next()
            }
        }
    } else {
        // 没有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()
        }
    }
})
router.afterEach(() => {
    NProgress.done()
})