使用vue判断验证用户登录状态
用户登录状态验证
路由配置
定义需要判断登录状态的meta 属性auth
const routes =[
{
path:'/',
component: resolve => require(['../components/mainTem/Filtrate.vue'],resolve),
meta:{auth:true,keepAlive: false},
name:'Filtrate'
},//首页
{
path:'/Home',
component: resolve => require(['../components/mainTem/Home.vue'],resolve),
meta:{auth:true,keepAlive: true },
name:'Home'
},//登录
{
path:'/Login',
component: resolve => require(['../components/mainTem/Login.vue'],resolve),
meta:{auth:true,keepAlive: false},
name:'Login'
},//最新案例
{
path:'/NewCase',
component: resolve => require(['../components/mainTem/NewCase.vue'],resolve),
meta:{auth:true,keepAlive: true},
name:'NewCase'
},//推荐
{
path:'/Recommend',
component: resolve => require(['../components/mainTem/Recommend.vue'],resolve),
meta:{auth:true,keepAlive: true},
name:'Recommend'
},//个人中心
{
path:'/User',
component: resolve => require(['../components/mainTem/User.vue'],resolve),
meta:{auth:true,keepAlive: true},
name:'User'
},//筛选
{
path:'/Filtrate',
component: resolve => require(['../components/mainTem/Filtrate.vue'],resolve),
meta:{auth:true,keepAlive: false},
name:'Filtrate'
},
{//详情
path:'/Detail',
component: resolve => require(['../components/mainTem/Detail.vue'],resolve),
meta:{auth:true,keepAlive: false},
name:'Detail'
}
]
监听
我用的是localStorage储存的用户token值。
业务逻辑：用户没有localStorage说明是第一次登录，则直接跳到登录页面，在登录页面储存token值，存在localStorage，用户关闭页面后，在24小时内，再次打开页面直接进入主页面，通过localStorage去判断当前token是否有效，如果已失效，则提示登录已超时，重新跳到登录页面。
meta
只有在路由中设置了meta auto属性为true的才判断，以上路由全部由设置
to
to为向后走的路由对象，包括路由的完整信息
from
from为从哪跳来的路由对象
next()
next()控制路由向下走，重新定义路由跳转的路由next(‘路由路径)
/** 验证用户是否登录 **/
router.beforeEach((to,from,next) => {
if(to.matched.some( m => m.meta.auth)) {
// console.log("先判断是否登录");
if(to.name=='Login'){
next();
}else{
if(localStorage.getItem('token')){
//访问服务器缓存数据，判断当前token是否失效
Vue.http.get("http:xxxx/Login/UserIsLogin?token="+localStorage.getItem('token')+"&url="+to.name,{withCredentials: true}).then(response => response.json()).then(num => {
// console.log('是否登录',num);
if(num.code==1001){
next();
}else{
alert('您的token已超时，请重新登录');
next('/Login');
}
})
}else{
next('/Login');
}
}
} else {
console.log("请先登录");
next()
}
})
