[英]Angular2 auth guard with http request and observables
我目前正在使用Spring Boot作為后端實現angular2示例應用程序。 我在前端身份驗證保護機制和可觀察變量方面遇到了一些問題。
我正在努力實現:
我的代碼當前看起來像這樣(我正在使用RC5 btw。):
驗證衛士
import {Injectable} from "@angular/core";
import {CanActivate, ActivatedRouteSnapshot, RouterStateSnapshot, Router} from "@angular/router";
import {Observable, Subject} from "rxjs/Rx";
import {AuthService} from "./auth.service";
@Injectable()
export class AuthGuard implements CanActivate {
constructor(private authService: AuthService, private router: Router) {}
canActivate(route: ActivatedRouteSnapshot, state: RouterStateSnapshot): Observable<boolean> | boolean {
var authenticated = this.authService.isAuthenticated();
var subject = new Subject<boolean>();
authenticated.subscribe(
(res) => {
console.log("onNext guard: "+res);
if(!res && state.url !== '/signin') {
console.log("redirecting to signin")
this.router.navigate(['/signin']);
}
subject.next(res);
});
return subject.asObservable();
}
}
驗證服務
import {Injectable} from "@angular/core";
import {User} from "./user.interface";
import {Router} from "@angular/router";
import {Http, Response, Headers} from "@angular/http";
import {environment} from "../environments/environment";
import {Observable, Observer, Subject} from "rxjs/Rx";
@Injectable()
export class AuthService {
private authenticatedUser : User;
constructor(private router: Router, private http: Http) {}
signupUser(user: User) {
}
logout() {
//do logout stuff
this.router.navigate(['/signin']);
}
isAuthenticated() : Observable<boolean> {
var subject = new Subject<boolean>();
if (this.authenticatedUser) {
subject.next(true);
} else {
this.http.get(environment.baseUrl + '/user')
.map((res : Response) => res.json())
.subscribe(res => {
console.log("next: returning true");
this.authenticatedUser = User.ofJson(res);
subject.next(true);
}, (res) => {
console.log("next: returning false");
subject.next(false);
});
}
return subject.asObservable();
}
}
問題是:即使我登錄后,防護也永遠不會激活路由器組件。
謝謝您的幫助!
更改
return subject.asObservable();
至
return subject.asObservable().first();
路由器等待可觀察對象完成。 first()
使它在第一個事件后完成。
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