fetchFile example

private function fetchFileFromURL(string $url, string $extension): ?MediaFile
    {
        $request = new Request();
        $request->query->set('url', $url);
        $request->query->set('extension', $extension);
        $request->request->set('url', $url);
        $request->request->set('extension', $extension);
        $request->headers->set('content-type', 'application/json');

        try {
            $file = $this->mediaService->fetchFile($request);
            if ($file !== null && $file->getFileSize() > 0) {
                return $file;
            }
        } catch (\Throwable) {
        }

        return null;
    }

    /** * @param array<string, mixed> $deserialized * * @return array<string, mixed> */

throw DocumentException::documentNotFound($documentId);
        }

        if ($document->getDocumentMediaFileId() !== null) {
            throw new DocumentGenerationException('Document already exists');
        }

        if ($document->isStatic() === false) {
            throw new DocumentGenerationException('This document is dynamically generated and cannot be overwritten');
        }

        $mediaFile = $this->mediaService->fetchFile($uploadedFileRequest);

        $fileName = (string) $uploadedFileRequest->query->get('fileName');

        if ($fileName === '') {
            throw new DocumentGenerationException('Parameter "fileName" is missing');
        }

        $mediaId = $context->scope(Context::SYSTEM_SCOPE, fn (Context $context): string => $this->mediaService->saveMediaFile($mediaFile, $fileName, $context, 'document'));

        $this->connection->executeStatement(
            'UPDATE `document` SET `updated_at` = :now, `document_media_file_id` = :mediaId WHERE `id` = :id',
            [

throw MediaException::cannotCreateTempFile();
        }

        $fileName = $request->query->getString('fileName', $mediaId);
        $destination = preg_replace('/[\x00-\x1F\x7F-\xFF]/', '', $fileName);

        if (!\is_string($destination)) {
            throw MediaException::illegalFileName($fileName, 'Filename must be a string');
        }

        try {
            $uploadedFile = $this->mediaService->fetchFile($request, $tempFile);
            $this->fileSaver->persistFileToMedia(
                $uploadedFile,
                $destination,
                $mediaId,
                $context
            );

            $this->eventDispatcher->dispatch(new MediaUploadedEvent($mediaId, $context));
        } finally {
            unlink($tempFile);
        }