Angular 6中的异步authguard [英] Async authguard in angular 6
问题描述
我想在允许访问Angle中的特定路由之前提供服务器端身份验证.
I would like to provide a server-side authentication before I give access to a specific route in angular.
我有一个实现CanActivate的AuthGuard和一个服务AuthService.
authService已经有一个private loggedIn: BehaviorSubject<boolean> = new BehaviorSubject<boolean>(null);
,视图会订阅该private loggedIn: BehaviorSubject<boolean> = new BehaviorSubject<boolean>(null);
以便知道用户是否已登录.我真的不知道我的方法是否错误,但这似乎行不通.
I have a AuthGuard which implements CanActivate and a service AuthService.
The authService already has a private loggedIn: BehaviorSubject<boolean> = new BehaviorSubject<boolean>(null);
which views subscribe to in order to know if the user is logged in or not. I don't really know if my approach is wrong, but it does not seem to work.
这是我在auth.guard.ts中拥有的东西:
This is what I have in auth.guard.ts:
canActivate(next: ActivatedRouteSnapshot, state: RouterStateSnapshot) : Observable<boolean> {
return this.authService.isAuthenticated().map((isLoggedIn) => {
if (isLoggedIn) {
return true;
} else {
this.router.navigate(['/login']);
return false;
}
})
}
这是auth.service.ts:
and this is auth.service.ts:
@Injectable()
export class AuthService {
private loggedIn: BehaviorSubject<boolean> = new BehaviorSubject<boolean>(null);
constructor(
private router: Router,
private http: HttpClient
) {
}
get isLoggedIn() {
return this.loggedIn.asObservable();
}
isAuthenticated() : Observable<boolean> {
const headers = new HttpHeaders().set("X-Requested-With", "XMLHttpRequest");
return this.http.get('/user', {headers: headers}).map(
response => {
if (response['username']) {
this.loggedIn.next(true);
return true;
} else {
return false;
}
}
)
}
推荐答案
这是RXJS6的方法,在身份验证服务中添加了变量_isAuthenticated
,以仅在禁用标志时请求服务器状态.希望对别人有帮助.
Here is approach for RXJS6, added a variable _isAuthenticated
in authentication service to request the server state just when the flag is disabled. I hope that helps others.
确保canActivate
返回纯布尔值或可观察值.路由处理程序将订阅给定的observable,并对来自值流的第一个布尔值做出反应.
Ensure canActivate
returns a plain boolean or an observable. The route handler will subscribe to the given observable and reacts to first boolean value coming from the value stream.
auth.guard.ts
auth.guard.ts
import { Injectable } from '@angular/core';
import { Router, CanActivate } from '@angular/router';
import { Observable } from 'rxjs/';
import { map, finalize } from 'rxjs/operators';
import { DataService } from '../data.service';
import { AuthenticationService } from './authentication.service';
@Injectable()
export class AuthenticationGuard implements CanActivate {
constructor(private router: Router,
private dataService: DataService,
private authenticationService: AuthenticationService) { }
canActivate(): any {
const isAuthenticated = this.authenticationService.isAuthenticated();
// All good
if ( isAuthenticated ) {
return true;
// Hmm, let's verify the user first
} else {
return this.authenticationService.isSessionAlive()
.pipe(
map(res => {
// No valid session; let's move to the login page
if ( res === false ) {
this.router.navigate(['/login'], { replaceUrl: true });
}
return res;
})
);
}
}
}
auth.service.ts(我正在使用rxjs 6)
auth.service.ts (I'm using rxjs 6)
import { Injectable } from '@angular/core';
import { Observable } from 'rxjs';
import { DataService } from '@app/core';
@Injectable()
export class AuthenticationService {
private _isAuthenticated = false;
constructor(
private dataService: DataService
) {}
isAuthenticated(): boolean {
return this._isAuthenticated;
}
isSessionAlive(): Observable<any> {
return Observable.create((observer) => {
this.dataService.SessionIsAlive()
.subscribe((res) => {
this._isAuthenticated = true;
observer.next(res.success); // your server response
}, (err) => {
this._isAuthenticated = false;
observer.next(false);
// observer.error(err); // won't work here you need to use next
});
});
}
}
这篇关于Angular 6中的异步authguard的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!