Symfony フレームワークを使用してファイルのアップロードとダウンロードを実装する手順

composer create-project symfony/website-skeleton my_project_name

php bin/console make:form FileUploadType

use SymfonyComponentFormAbstractType;
use SymfonyComponentFormExtensionCoreTypeFileType;
use SymfonyComponentFormExtensionCoreTypeSubmitType;
use SymfonyComponentFormFormBuilderInterface;

class FileUploadType extends AbstractType
{
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder->add('file', FileType::class)
                ->add('upload', SubmitType::class);
    }
}

use AppFormFileUploadType;
use SymfonyBundleFrameworkBundleControllerAbstractController;
use SymfonyComponentHttpFoundationRequest;
use SymfonyComponentRoutingAnnotationRoute;

class FileController extends AbstractController
{
    /**
     * @Route("/file/upload", name="file_upload")
     */
    public function upload(Request $request)
    {
        $form = $this->createForm(FileUploadType::class);
        $form->handleRequest($request);

        if ($form->isSubmitted() && $form->isValid()) {
            $file = $form->get('file')->getData();

            // 处理文件上传逻辑

            return $this->redirectToRoute('file_list');
        }

        return $this->render('file/upload.html.twig', [
            'form' => $form->createView(),
        ]);
    }
}

use SymfonyComponentHttpFoundationResponseHeaderBag;
use SymfonyComponentRoutingAnnotationRoute;

class FileController extends AbstractController
{
    // ...

    /**
     * @Route("/file/{filename}/download", name="file_download")
     */
    public function download($filename)
    {
        $filePath = $this->getParameter('file_directory').'/'.$filename;
        $response = new BinaryFileResponse($filePath);

        $response->setContentDisposition(
            ResponseHeaderBag::DISPOSITION_ATTACHMENT,
            $filename
        );

        return $response;
    }
}

file_upload:
    path: /file/upload
    controller: AppControllerFileController::upload

file_download:
    path: /file/{filename}/download
    controller: AppControllerFileController::download

{{ form_start(form) }}
{{ form_widget(form) }}
{{ form_end(form) }}