如何调试 Symfony StreamedResponse？

Question

I'm using a StreamedResponse to serve a large CSV file. When I get an error in the callback function , the browser merely displays a "file not found" error, and I have no access to the Symfony debug toolbar. Is there a way to access the Exception that was thrown in the callback ? My action looks like this:

  public function exportAction(Request $request) {

     $response = new StreamedResponse();
     $response->setCallback(function() {

        // Here i'm fetching my data with Doctrine and outputting it with 
        // $handle = fopen('php://output', 'w'); ...fputcsv() ...fclose();

     });

     $response->setStatusCode(200);
     $response->headers->set('Content-Type', 'text/csv; charset=utf-8');
     $response->headers->set('Content-Disposition', 'attachment; filename="export.csv"');

     return $response;
  }

EDIT Most of the time, when looking at the request in the browser dev tool, the response content is blank.

Answer 1

嗯...我不知道有什么方便的方法，但是您可以加载主页，打开分析器，然后单击“最后10个”按钮以查看过去的配置文件。

Answer 2

Caution

The web debug toolbar is not available for responses of type StreamedResponse .

Source: https://symfony.com/doc/current/reference/configuration/web_profiler.html