Question

我有一个服务AuthenticationService来刷新令牌和截取AuthHttp调用的拦截器，问题是在调用失败的拦截器方法中我使refreshToken调用订阅了observable然后当我得到我需要调用的响应时第一个http调用，并且无法使其工作：

refreshToken(): Observable<any>{
    return this.authHttp.get(GLOBAL.apiurl+'/refresh-token',"").map(
            (response) => {
                    let token = response.json() && response.json().token;
                    if (token){
                        console.log('refresh token');
                        localStorage.setItem('token', token);
                        return true;
                    }
                    else{
                        console.log('no token');
                        this.resetLocalStorage();
                        return false;
                    }
                }
    );
}

然后我有一个authttp的拦截器：

request(url: string | Request, options?: RequestOptionsArgs): Observable<Response> {
    return this.intercept(super.request(url, options));
  }

intercept(observable: Observable<Response>): Observable<Response> {

    return observable.catch((err, source) => {

      if (this.isUnauthorized(err.status)) {
        //logout the user or do what you want
          this.authService.refreshToken().subscribe(result => {
                    if(!result){
                    }
                    HERE THE FIRST FAILED CALL MUST BE CALLED
                },
                err => {
                }
            );
        if (err instanceof Response) {
          return Observable.throw(err.json().message || 'backend server error');
        }
        return Observable.empty();
      } else {
        return Observable.throw(err);
      }
    })

  }

Answer 1

在此块中，您将返回Observable.empty（）;在异步调用之外，我认为你需要在服务调用中分配这个。我想现在你将获得空的返回，因为你已经返回了observable而没有等待服务调用（下面给出了你可能需要根据你的要求纠正它的伪代码）

if (this.isUnauthorized(err.status)) {
        //logout the user or do what you want
          this.authService.refreshToken().subscribe(result => {
                    if(!result){
                    }
                    HERE THE FIRST FAILED CALL MUST BE CALLED
                    // your return must be somewhere here
                    return Observable.empty();
                },
                err => {
                    return Observable.throw(err.json().message || 'backend server error');
                }
            );

      }

重试可观察的内部刷新令牌订阅 - 角4

1 个答案: