feature: add a redirect url when not logged in

https://github.com/PanJiaChen/vue-element-admin/issues/438

src/permission.js

@@ -30,7 +30,7 @@ router.beforeEach((to, from, next) => {
     if (whiteList.indexOf(to.path) !== -1) {
       next()
     } else {
-      next('/login')
+      next(`/login?redirect=${to.path}`) // 否则全部重定向到登录页
       NProgress.done()
     }
   }

src/views/login/index.vue

@@ -66,7 +66,16 @@ export default {
         password: [{ required: true, trigger: 'blur', validator: validatePass }]
       },
       loading: false,
-      pwdType: 'password'
+      pwdType: 'password',
+      redirect: undefined
+    }
+  },
+  watch: {
+    $route: {
+      handler: function(route) {
+        this.redirect = route.query && route.query.redirect
+      },
+      immediate: true
     }
   },
   methods: {
@@ -83,7 +92,7 @@ export default {
           this.loading = true
           this.$store.dispatch('Login', this.loginForm).then(() => {
             this.loading = false
-            this.$router.push({ path: '/' })
+            this.$router.push({ path: this.redirect || '/' })
           }).catch(() => {
             this.loading = false
           })