Is there any way we can redirect to a different component from @CanActivate in Angular2 ?
问问题
40593 次
6 回答
64
到今天为止,使用最新的@angular/router 3.0.0-rc.1,这里有一些关于如何通过CanActivate
路由守卫来做到这一点的参考资料:
逻辑的主要要点如下:
// ...
canActivate(route: ActivatedRouteSnapshot, state: RouterStateSnapshot) {
if (this.authService.isLoggedIn) {
// all ok, proceed navigation to routed component
return true;
}
else {
// start a new navigation to redirect to login page
this.router.navigate(['/login']);
// abort current navigation
return false;
}
}
于 2016-08-26T09:08:24.857 回答
13
你的后卫可以很容易地成为一个注射剂,因此,它可以包括它自己的注射剂。所以我们可以简单地注入路由器,以便重定向。不要忘记在您的应用模块中添加服务作为提供程序。
@Injectable()
export class AuthGuard implements CanActivate {
constructor(private router: Router, private authService: AuthService) {}
canActivate(route: ActivatedRouteSnapshot, state: RouterStateSnapshot): Observable<boolean> | boolean {
if (!authService.isAuthenticated()) {
this.router.navigate(['/login']);
return false;
}
return true;
}
}
export const ROUTES: Routes = [
{path: 'login', component: LoginComponent},
{path: 'protected', loadChildren: 'DashboardComponent', canActivate: [AuthGuard]}
];
于 2016-10-14T15:27:56.523 回答
12
是的你可以!这样做会阻止你的组件实例化。
首先,新建一个文件src/app-injector.ts
let appInjectorRef;
export const appInjector:any = (injector = false) => {
if (!injector) {
return appInjectorRef;
}
appInjectorRef = injector;
return appInjectorRef;
};
然后,从bootstrap
// ...
import {appInjector} from './app-injector';
// ...
bootstrap(App, [
ROUTER_PROVIDERS
]).then((appRef) => appInjector(appRef.injector));
最后在你的功能
// ...
import {appInjector} from './app-injector';
// ...
@CanActivate((next, prev) => {
let injector = appInjector();
let router = injector.get(Router);
if (42 != 4 + 2) {
router.navigate(['You', 'Shall', 'Not', 'Pass']);
return false;
}
return true;
})
等等瞧!
在这里讨论过https://github.com/angular/angular/issues/4112
你可以在这里找到一个完整的例子http://plnkr.co/edit/siMNH53PCuvUBRLk6suc?p=preview by @brandonroberts
于 2016-01-28T14:58:49.920 回答
3
从 Angular 7.1 开始,您可以返回UrlTree
而不是boolean
:
@Injectable({
providedIn: 'root',
})
export class AuthGuard implements CanActivate {
constructor(private authService: AuthService, private router: Router) { }
canActivate(): boolean | UrlTree {
return this.authService.isAuthenticated() || this.router.createUrlTree(['/login']);
}
}
于 2019-03-27T20:22:03.827 回答
2
这可能会帮助那些试图在继续之前等待某事的人。
waitForBonusToLoad(): Observable<[boolean, string]> {
const userClassBonusLoaded$ = this.store.select(fromRoot.getUserClasssBonusLoaded);
const userClassSelected$ = this.store.select(fromRoot.getClassAttendancesSelectedId);
return userClassBonusLoaded$.withLatestFrom(userClassSelected$)
.do(([val, val2]) => {
if (val === null && val2 !== null) {
this.store.dispatch(new userClassBonus.LoadAction(val2));
}
})
.filter(([val, val2]) => {
if(val === null && val2 === null) return true;
else return val;
})
.map(val => {
return val;
})
.take(1);
}
canActivate(route: ActivatedRouteSnapshot, state: RouterStateSnapshot): Observable<boolean> {
return this.waitForBonusToLoad().map(([val, val2]) =>
{
if(val === null && val2 === null){
this.router.navigate(['/portal/user-bio']);
return false;
}
else {
return true;
}
}
)
}
于 2017-02-08T16:35:28.180 回答
1
如果您使用 observable 来确定,您可以利用tap
operator from rxjs
:
@Injectable({
providedIn: SharedModule // or whatever is the equivalent in your app
})
export class AuthGuard implements CanActivate {
constructor(private authService: AuthService,
private router: Router) {}
canActivate(next: ActivatedRouteSnapshot, state: RouterStateSnapshot): Observable<boolean> {
return this.authService.isLoggedIn()
.pipe(tap((isLoggedIn: boolean) => {
if (!isLoggedIn) {
this.router.navigate(['/']);
}
}));
}
}
于 2018-07-08T20:22:28.827 回答