vue-router动态路由实现前端权限管理方式

import Vue from 'vue'
import Router from 'vue-router'
import HelloWorld from '@/components/HelloWorld'
import demo from '@/components/role'
import  notFind from '@/components/404'
Vue.use(Router);
//不需要权限的路由
export const constantRouterMap = [
  {
    path: '/',
    component: HelloWorld,
    name: '首页'
  }, {
    path : '/404',
   component:notFind,
    meta : {
      title : '404未找到',
    }
  }
]
//实例化vue的时候只挂载constantRouter
export default new Router({
  routes: constantRouterMap
});

//异步挂载的路由
//动态需要根据权限加载的路由表
export const asyncRouterMap = [
  {
    path: '/role',
    component: demo,
    name: '权限测试',
    meta: { role: ['admin','super_editor'] }, //页面需要的权限
  },{
    path : '*',
    redirect : '/404'
  }
];

// The Vue build version to load with the `import` command
// (runtime-only or standalone) has been set in webpack.base.conf with an alias.
import Vue from 'vue'
import App from './App'
import router from './router'
import { asyncRouterMap, constantRouterMap } from './router';
import Vuex from "Vuex"
import VueDND from 'awe-dnd'
import BaiduMap from 'vue-baidu-map'
Vue.use(Vuex)
function hasPermission(roles, route) {
  if (route.meta && route.meta.role) {
    console.log(roles);
    return roles.some(role => route.meta.role.indexOf(role) >= 0)
  } else {
    return true
  }
}
const store = new Vuex.Store({
  state: {
    count: 0,
    token:"asdsd",
    roles:"",
    routers:[],
    addRouters:[]
  },
  getters:{
    token(){
      return "asdsd"
    },
    roles(state ){
      return state.roles
    },
    addRouters(state){
      return state.addRouters
    },
    routers(state){
      return state.routers
    }
  },
  actions:{
    GetInfo({state}){
      return {
        data:{
          role:state.roles=["admin"]
        }
      }
    },
    GenerateRoutes({ commit }, data){
      return new Promise(resolve => {
        const { roles } = data;
        console.log(asyncRouterMap,roles);
        const accessedRouters = asyncRouterMap.filter(v => {
          if (roles.indexOf('admin') >= 0) return true;
          if (hasPermission(roles, v)) {
            if (v.children && v.children.length > 0) {
              v.children = v.children.filter(child => {
                if (hasPermission(roles, child)) {
                  return child
                }
                return false;
              });
              return v
            } else {
              return v
            }
          }
          return false;
        });
        console.log(accessedRouters);
        commit('SET_ROUTERS', accessedRouters);
        resolve();
      })
    }
  },
  mutations: {
    SET_ROUTERS: (state, routers) => {
      console.log(routers);
      state.addRouters = routers;
      state.routers = constantRouterMap.concat(routers);
    }
  }
});
router.beforeEach((to, from, next) => {
  if (store.getters.token) { // 判断是否有token
    if (to.path === '/login') {
      next({ path: '/' });
    } 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('GetInfo').then(res => { // 拉取info
          const roles = res.data.role;
          store.dispatch('GenerateRoutes', { roles }).then(() => { // 生成可访问的路由表
            console.log(store.getters.addRouters);
            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(err => {
          console.log(err);
        });
      } else {
        next() //当有用户权限的时候，说明所有可访问路由已生成 如访问没权限的全面会自动进入404页面
      }
    }
  } else {
    next('/login'); // 否则全部重定向到登录页
  }
});