import http from '../../axios';
async function getUserInfo() {
 const res = await http.getUserInfo();
 return res;
}

const actions = {
 getPermissions({ commit }) {
 return new Promise(resolve => {
  getUserInfo().then(res => {
  if (res) {
   let permissionList = res.permissionList;
   commit('SET_PERMISSIONS', permissionList);
   // 根据后台返回的路由，生成实际可以访问的路由
   let accessRoutes = filterAsyncRoutesByPermissions(asyncRoutes, permissionList);
   commit('SET_ROUTES', accessRoutes);
   commit('SET_USER_INFO', { name: res.name, accountName: res.accountName })
   resolve(accessRoutes);
  } else {
   resolve([]);
  }
  }).catch(() => resolve([]));
 })
 }
}

export const constantRoutes = [
 {
  path: '/redirect',
  component: Layout,
  hidden: true,
  children: [
   {
    path: '/redirect/:path(.*)',
    component: () => import('@/views/redirect/index'),
   },
  ],
 ,
 ...
 {
  path: '/404',
  component: () => import('@/views/error-page/404'),
  hidden: true,
 }
];

export const asyncRoutes = [
 {
  path: '/system',
  component: Layout,
  name: '系统管理',
  meta: { title: '系统管理', icon: 'el-icon-user', affix: true },
  children: [
   {
    path: '/system',
    component: () => import('@/views/management/system/Index'),
    meta: { title: '系统管理', icon: 'el-icon-setting', affix: true },
   },
  ],
 }
...
]

export function filterAsyncRoutesByPermissions(routes, menus) {
 const res = []
 routes.forEach(route => {
 const tmp = { ...route }
 let index = menus.map(menu => menu.url).indexOf(tmp.path);
 if (index != -1) {
  // 后端返回路由信息覆盖前端定义路由信息
  tmp.name = menus[index].name;
  // debugger;
  tmp.meta.title = menus[index].name;
  tmp.children.forEach(child => {
  if (child.path == tmp.path) {
   child.meta.title = tmp.meta.title;
  }
  })
  res.push(tmp)
 }
 });
 // 根据返回菜单顺序，确定路由顺序
 /**
 * TODO 子菜单排序
 */
 res.sort((routeA, routeB) => menus.map(menu => menu.url).indexOf(routeA.path) - menus.map(menu => menu.url).indexOf(routeB.path))
 return res
}

// 引入store
import store from './store';
const whiteList = ['/login', '/auth-redirect']; // no redirect whitelist

// 路由守卫
router.beforeEach(async (to, from, next) => {
 //start progress bar
 NProgress.start()
 if (hasToken) {
  if (to.path === '/login') {
   // ... 省略登出逻辑
   NProgress.done();
  } else { 
   // 查看是否已缓存过动态路由
   const hasRoutes = store.getters.permission_routes && store.getters.permission_routes.length > 0;
   if (hasRoutes) {
    next();
   } else {
    try {
     const accessRoutes = await store.dispatch('permission/getPermissions');
     router.addRoutes(accessRoutes);
     const toRoute = accessRoutes.filter((route) => route.path == to.path);
     next({ path: toRoute.length > 0 "htmlcode">

import store from '@/store'
 export default {
 inserted(el, binding, vnode) {
 const { value } = binding
 const permissions = store.getters && store.getters.permissions;
 if (value) {
  // 获取当前所挂载的vue所在的上下文节点url
  let url = vnode.context.$route.path;
  let permissionActions = permissions[url];
  // console.log(permissionActions)
  const hasPermission = permissionActions.some(action => {
  if (value.constructor === Array) {
   // 或判断： 只要存在任1，判定为有权限
   return value.includes(action);
  } else {
   return action === value;
  }
  })
  if (!hasPermission) {
  el.parentNode && el.parentNode.removeChild(el)
  }
 } else {
  throw new Error(`need further permissions!`)
 }
 }
}


后端给出的权限数据是路由（url）与操作的对应Map，url可以通过将要挂载到的vnode属性拿到。这个方法有点类似于AOP，在虚拟元素挂载之后做判断，如果没有权限则从父元素上移除掉。

使用方法：

  
举例一：单个按钮 （注意双引号套单引号的写法）
  
  

 <el-button @click.native.prevent="editUser(scope.row)" type="text" size="small" v-permission="'op_edit'">
        编辑
 </el-button>

  
  
  
举例二：或判断（传入数组），只要拥有数组中一个权限，则保留元素，所有权限都没有，则移除。

  

在上一篇博客https://www.jb51.net/article/194361.htm

下拉菜单上增加控制：


相应数据定义中增加action属性。

该方法无法覆盖所有场景，所以依然给出相应工具类：


/**
 * 
 * @param {*当前页面路由} url 
 * @param {*操作code e.g op_add } value 
 * @return true/false 是否有该项权限
 */
function checkPermission(url, value) {

 const permissions = store.getters && store.getters.permissions;
 let permissionActions = permissions[url];

 if (!permissionActions) {
  return false;
 }

 let hasPermission = permissionActions.some(action => {
  if (value.constructor === Array) {
   // 或判断： 只要存在任1，判定为有权限
   return value.includes(action);
  } else {
   return action === value;
  }
 });
 return hasPermission;

}


以上完成按钮粒度权限控制。
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