角度HttpInterceptor修改错误对象

我已经实现了 HttpInterceptor 这会为每个请求添加一个标头,并在服务器响应时重定向到登录页面 401 . 我不想让它做任何其他事情。

然而,我注意到,每当我从服务器得到错误响应时(正如我所期望的那样),拦截器就会踢它并抛出 HttpErrorResponse . 然而,在我的控制器中,我只得到一个 TypeError 对象,而不包含来自服务器的详细信息。

我正在附上相关代码。

拦截器

@Injectable()
export class HttpAuthorizationService implements HttpInterceptor {

  constructor(private cookieService: CookieService, private angularRouter: Router) { }

  intercept(req: HttpRequest<any>, next: HttpHandler):  Observable<HttpEvent<any>> {
    req = req.clone({
      setHeaders: {
        Authorization: 'Bearer ' + this.cookieService.get('Authorization')
      }
    });

    return next.handle(req).do((ev: HttpEvent<any>) => {})
    .catch(error => {
      if (error instanceof HttpErrorResponse) {
        if (error.status === 401) {
          this.cookieService.set('expired', 'Session expired');
          this.angularRouter.navigate(['/login']);
        }
      }
      return Observable.throw(error); <-- i think this is bad
    });
  }
}

和实际 控制器

deleteCategory(category) {
this.confirmationService.confirm({
  message: 'Are you sure you want to delete?',
  header: 'Delete product category ' + category,
  icon: 'fa fa-trash',
  accept: () => {
    this.productService.deleteCategory(category).subscribe(
      success => {
        this.msgs = [{ severity: 'success', summary: 'Success', detail: 'Successfully deleted the product category ' + category }];
      },
      error => {
        this.categories.push(category);
        this.msgs = [{ severity: 'error', summary: 'Could not delete category', detail: error.status + '-' + error.error }]; <-- getting object without error attribute and no info from the server
      }
    );
  },
  reject: () => this.categories.push(category)
});

}

我的问题是如何保留原始的错误对象,而不是我实际得到的 如果我没有实现这个HttpInterceptor,那么我的控制器就会得到正常的错误对象