角卫队canActivate方法不适用于Observable <boolean>

时间:2018-11-28 19:59:19

标签: angular authentication jwt angular7

我正在尝试在访问路由之前在后端验证令牌

这是我的身份验证服务:

export class AuthService {

  private registerUrl = 'http://127.0.0.1:3000/register';
  private loginUrl = 'http://127.0.0.1:3000/signin';
  private verifyTokenUrl = 'http://127.0.0.1:3000/v';

  constructor(private http: HttpClient) { }


  isLoggedIn() {
    if (!localStorage.getItem('token')) {
      console.log('false in isloggedin method');
      return false;
    }
    console.log('logged in, not verified yet');
    return true;
  }

  isTokenValid(token): Observable<boolean> {
    console.log('verifing');
    return this.http.post<any>(this.verifyTokenUrl, {token});
  }

  getToken() {
    return localStorage.getItem('token');
  }
}

后卫:

export class AuthGuard implements CanActivate {
  constructor(private authService: AuthService,
              private router: Router) {}

  canActivate(route: ActivatedRouteSnapshot, state: RouterStateSnapshot): Observable<boolean> {
    if (this.authService.isLoggedIn()) {
      const token = localStorage.getItem('token');
      this.authService.isTokenValid(token)
      .pipe(
        map(e => {
          if (e) {
            return true;
          } else {
            this.router.navigate(['/login']);
            return false;
          }
        }),
        catchError((err) => {
          this.router.navigate(['/login']);
          return of(false);
        })
      );
    } else {
      this.router.navigate(['/login']);
      return of(false);
    }
  }
}

似乎可观察对象不会“像使用订阅方法时一样”激活,并且API中的代码甚至都没有运行。 canActivate()假设接受一个Observable作为返回值。守卫将等待Observable解析并查看该值。如果为“ true”,它将通过检查,否则(任何其他数据或抛出错误)将拒绝该路由。引用此answer

在我的情况下,

该应用程序停留在当前页面,并且不会路由到目标,也不会发布到服务器。还有一个类似的问题here,他们通过添加.take(1)来解决,但在我的情况下,它给出了一个错误Property 'take' does not exist on type 'OperatorFunction<{}, boolean>'

这是我的验证API,以防万一

//.........token verify
app.post('/v', (req, res) => {
    const {token} = req.body
    const payload = jwt.verify(token, 'secretKey' )
    console.log(payload);
    if (!payload) {
        return res.status(401).send(false)
    }
    res.status(200).send(true)
})

2 个答案:

答案 0 :(得分:2)

您没有返回可观察到的信息:

this.authService.isTokenValid(token)
  //...

—>

return this.authService.isTokenValid(token)
  //... 

答案 1 :(得分:1)

尝试实现您的路线后卫返回一个可观察的东西:

export class AuthGuard implements CanActivate {
  constructor(private authService: AuthService,
    private router: Router) { }

  canActivate(route: ActivatedRouteSnapshot, state: RouterStateSnapshot): Observable<boolean> {
    return Observable.create(observer => {
      if (this.authService.isLoggedIn()) {
        const token = localStorage.getItem('token');
        this.authService.isTokenValid(token)
          .pipe(
            map(e => {
              if (e) {
                observer.next(true);
              } else {
                this.router.navigate(['/login']);
                observer.next(false);
              }
            }),
            catchError((err) => {
              this.router.navigate(['/login']);
              observer.next(false);
            })
          );
      } else {
        this.router.navigate(['/login']);
        observer.next(false);
      }
    });
  }
}

此外,别忘了在应用程序模块中将拦截器实现为提供程序:

// your.module.ts
// ...
providers: [
  ...,
  AuthGuard
];

在您要守护的路线上:

// some route to guard
{ path: 'guarded-route', component: GuardedRouteComponent, canActivate: [AuthGuard] }