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<>VUE后台管理系统权限管理（面试路由守卫）
1.背景
后台管理系统中总会遇到权限分配的问题；这也是一道vue的很经典的面试问题
2.解决思路
* 权限管理无非前端或者后台解决
*
先说一下前端解决的思路；在设置路由的时候，先了解meta这个属性，meta的定义：简单来说就是路由元信息，也就是每个路由身上携带的信息。在meta中设置roles来分配权限，然后在main.js中用vue的routre.beforeEach;来检验我们这个路由。可以结合下面的代码来看，就很容易理解。
*
后台解决；后台解决的思路就是当登录之后前端将这个用户名传递给后台，后台接收之后，根据收到的数据来给用户返回相应的权限；浏览器开始根据收到的信息开始加载页面。（ps:就不附代码了）
{ path:'/Transp', name:'Transp', component:Transp, meta:{ roles: 'AH'
//这个页面用户AH有权限来看 }, }, { path: '/Home', name: 'Home', component: Home, meta: {
requireAuth: true, // 添加该字段，表示进入这个路由是需要登录的 } }, router.beforeEach((to,from,next)
=>{ console.log(to.meta.roles) if(to.meta.requireAuth == true){ //需要登录权限进入的路由 if
(store.state.token){ //取到登录信息 next() }else if(sessionStorage.getItem('isLogin'))
{ //得到登录信息，进行下一步 this.$router.push({name:'Home'}); //登录成功后跳转到的页面 next(); }else{
next({name:'Login'}); } // .includes(role) }else if(to.meta.roles){ next({name:
'Transp'}) }else{ //不需要登录权限 next(); } })
