显示来自 HttpInterceptor 的模态对话框

Question

@Injectable()
export class MyInterceptor implements HttpInterceptor {
  intercept(
    req: HttpRequest<any>,
    next: HttpHandler
  ): Observable<HttpEvent<any>> {

    //show a modal dialog to hold the request until user respond/close the dialog
    if(ShowModalDialog()) 
       return next.handle(req);
     else
       route to login
  }
}

我试图显示一个 angular material 对话框，但它不会阻止请求并继续执行到下一行。

如何在发现请求出错时显示来自拦截器的模态对话框，向用户显示一些选项并在对话框关闭后恢复执行。

是否可以stop/hold请求这样的对话框？

Answer 1

您可以使用 angular material 对话框执行此操作：

@Injectable()
export class MyInterceptor implements HttpInterceptor {
  constructor(private dialog: MatDialog, private router: Router) {}
  
  intercept(req: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>> {
    if(ShowModalDialog()) {
      return this.dialog.open(DialogModalComponent).afterClosed().pipe(
        concatMap(() => next.handle(req))
      );
    } else {
      return next.handle(req);
    }
  }
}

显示来自 HttpInterceptor 的模态对话框

Show modal dialog from HttpInterceptor

javascript

typescript

angular-material

angular

httpinterceptor