如何使用Symfony 6的转发功能强制下载？

Question

问题是使用 Symfony 的转发功能将数据从一个控制器发送到另一个控制器。 该功能的解释这里

在我的第一个控制器中，我执行由操作员提供的日期限制的查询。

#[Route('/admin/fuente/exportar0/', name: 'app_exportar0_fuente', methods: ['GET', 'POST'])]
    public function exportar0(Request $request, FuenteRepository $fuenteRepository, CSVResponse $CSVResponse): Response
    {
           $defaultData = [];
    $form = $this->createFormBuilder($defaultData, ['method' => Request::METHOD_GET])
            
        ->add('fecha_desde', DateType::class, array(
                'label'    => 'Fecha desde?: ', 
                'input'=>'string', 'required' => true,  
            'widget' => 'single_text',
        'attr' => array('style' => 'width: 120px'), 

            ))
        ->add('fecha_hasta', DateType::class, array(
                'label'    => 'Fecha hasta?: ', 
                'input'=>'string', 'required' => true, 
              'widget' => 'single_text',
             'attr' => array('style' => 'width: 120px'),

                ))
         ->add('save', SubmitType::class, ['label' => 'Buscar'])

        ->getForm();

        $form->handleRequest($request);
       
        

      if($form->isSubmitted()&&$form->isValid()){

        // datafecha is an array with "fecha_desde", and "fecha_hasta" keys 
        
       $datafechas = $form->getData();

       $noticias = $fuenteRepository->findTodosCSV($datafechas);
       
       $response = $this->forward('App\Controller\FuenteController::csvAction', [
       
        'noticias' => $noticias
    ]);

      return $response;
      

      }
      return $this->render('fuente/entrefechas.html.twig', array(
        'form' => $form->createView() ));
     
    }

在第二个控制器中，我使用前一个控制器的查询结果生成 csv 文件并下载它。

 #[Route('/admin/fuente/csv/', name: 'app_csv_fuente', methods: ['GET', 'POST'])]
            public function csvAction(array $noticias ): Response
    {           

        $data=array();
       
        $data[0]= array("Id","Diario","Link", "Palabras","Título","Contenido","Fecha","Mes", "Año",
        "Protagonista", "Dinámica Conflictual", "Sector", "Sub sector", "Departamento","Pertenencia",
        "Agrupación", "Agregación", "Antagonista", "Actor Estatal","Nivel de Gobierno", "Participación",
        "Protagonista", "Respuesta Patronal 1","Respuesta Patronal 2", "Respuesta Estado 1", "Respuesta Estado 2",
   "Demanda 1 nombre", "Demanda 1 principal","Demanda 2 nombre","Demanda 2 principal", 
    "Demanda 3 nombre", "Demanda 3 principal", "Actor emergente",
     "Formato","Formato 2","Formato 3",     
);
       $i=1;
     
        foreach ($noticias as $noticia) {
         
         $data[$i]= array(
              $noticia['id'],
               $noticia['diario'],
               $noticia['link'],
               $noticia['palabras'],
               $noticia['titulo'],
               $noticia['contenido'],
               $noticia['fecha']->format('d-m-Y'),
               $noticia['fecha']->format('F'),
               $noticia['fecha']->format('Y'),
               $noticia['protagonista_name'],
               $noticia['actividad_name'],  
               $noticia['sector_name'],
               $noticia['subsector_name'],
               $noticia['Departamento'],
               $noticia['Pertenencia'],
               $noticia['Agrupacion'],
               $noticia['Agregacion'],
               $noticia['Antagonista'],
               $noticia['Actorestatal'],
               $noticia['Nivelgobierno'],
               $noticia['Participacion'],
               $noticia['protagonista_name'],
               $noticia['respuestapatronal_name'],
               $noticia['respuestapatronal1_name'],
               $noticia['respuestaestado_name'],
               $noticia['respuestaestado1_name'],
               $noticia['demanda1_name'],
               $noticia['principal1_name'],
               $noticia['demanda2_name'],
               $noticia['principal2_name'],
               $noticia['demanda3_name'],
               $noticia['principal3_name'],
               $noticia['Actoremergente'],
               $noticia['protesta_name'],
               $noticia['protesta_name2'],
               $noticia['protesta_name3'] ,        
       ); 
         $i++;
           }  
       
            
              $fp = fopen('php://memory','w', "w");
              foreach($data as $fields){
                fputcsv($fp, $fields, ';');
              }
              rewind($fp);

              $response = new Response(stream_get_contents($fp));
              fclose($fp);
              $response->headers->set('Content-Type', 'text/csv; charset=UTF-8');
              $response->headers->set('Content-Encoding', 'UTF-8');
              $response->headers->set('Cache-Control', 'private');
              
              $response->headers->set('Content-Disposition', 'attachment; filename="noticias.csv"');
              $response->sendHeaders();
            
              
              return $response;

            }           

问题是下载失败但csv文件创建了！ 当我将此函数应用于下载时，它不会发生，但文件会在内存或服务器空间中的某个位置生成。我怎么知道？ 如果我在底部工具栏中查找 Ajax 部分，我可以看到已生成但未下载的文件列表。 如果我们点击功能栏中的其中一些链接，就可以在那里实现下载。 挑战在于如何实现直接下载

Answer 1

如果您稍后想要获取内容，您还需要打开流进行阅读。

$fp = fopen('php://memory','rw');
foreach($data as $fields){
    fputcsv($fp, $fields, ';');
}
rewind($fp);

$response = new Response(stream_get_contents($fp));
fclose($fp);