如何在所有路线上申请canActivate后卫？

Question

我有一个angular2主动防护,如果用户没有登录,它会处理,将其重定向到登录页面:

import { Injectable } from  "@angular/core";
import { CanActivate , ActivatedRouteSnapshot, RouterStateSnapshot, Router} from "@angular/router";
import {Observable} from "rxjs";
import {TokenService} from "./token.service";

@Injectable()
export class AuthenticationGuard implements CanActivate {

    constructor (
        private router : Router,
        private token : TokenService
    ) { }

    /**
     * Check if the user is logged in before calling http
     *
     * @param route
     * @param state
     * @returns {boolean}
     */
    canActivate (
        route : ActivatedRouteSnapshot,
        state : RouterStateSnapshot
    ): Observable<boolean> | Promise<boolean> | boolean {
        if(this.token.isLoggedIn()){
            return true;
        }
        this.router.navigate(['/login'],{ queryParams: { returnUrl: state.url }});
        return;
    }
}

我必须在每条路线上实施它,如:

const routes: Routes = [
    { path : '', component: UsersListComponent, canActivate:[AuthenticationGuard] },
    { path : 'add', component : AddComponent, canActivate:[AuthenticationGuard]},
    { path : ':id', component: UserShowComponent },
    { path : 'delete/:id', component : DeleteComponent, canActivate:[AuthenticationGuard] },
    { path : 'ban/:id', component : BanComponent, canActivate:[AuthenticationGuard] },
    { path : 'edit/:id', component : EditComponent, canActivate:[AuthenticationGuard] }
];

有没有更好的方法来实现canActive选项而不将其添加到每个路径.

我想要的是在主路线上添加它,它应该适用于所有其他路线.我搜索了很多,但我找不到任何有用的解决方案

谢谢

Answer 1

您可以引入无组件父路线并在那里应用警卫:

const routes: Routes = [
    {path: '', canActivate:[AuthenticationGuard], children: [
      { path : '', component: UsersListComponent },
      { path : 'add', component : AddComponent},
      { path : ':id', component: UserShowComponent },
      { path : 'delete/:id', component : DeleteComponent },
      { path : 'ban/:id', component : BanComponent },
      { path : 'edit/:id', component : EditComponent }
    ]}
];

Answer 2

您还可以在app.component的ngOnInit函数中订阅路由器的路由更改，并从那里检查身份验证，例如

    this.router.events.subscribe(event => {
        if (event instanceof NavigationStart && !this.token.isLoggedIn()) {
            this.router.navigate(['/login'],{ queryParams: { returnUrl: state.url}}); 
        }
    });

当路线改变时，我更喜欢这种方式来进行任何种类的应用范围检查。