111 lines
3.6 KiB
PHP
111 lines
3.6 KiB
PHP
<?php
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/**
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* @file
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*/
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use Drupal\file\FileInterface;
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/**
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* @file
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* Hooks for file module.
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*/
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/**
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* @defgroup file File interface
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* @{
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* Common file handling functions.
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*
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* @section file_security Uploading files and security considerations
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*
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* Using \Drupal\file\Element\ManagedFile field with a defined list of allowed
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* extensions is best way to provide a file upload field. It will ensure that:
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* - File names are sanitized by the FileUploadSanitizeNameEvent event.
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* - Files are validated by \Drupal\file\Validation\FileValidatorInterface().
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* - Files with insecure extensions will be blocked by default even if they are
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* listed. If .txt is an allowed extension such files will be renamed.
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*
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* The \Drupal\Core\Render\Element\File field requires the developer to ensure
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* security concerns are taken care of. To do this, a developer should:
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* - Add the #upload_validators property to the form element. For example,
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* @code
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* $form['file_upload'] = [
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* '#type' => 'file',
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* '#title' => $this->t('Upload file'),
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* '#upload_validators' => [
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* 'FileExtension' => [
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* 'extensions' => 'png gif jpg',
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* ],
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* ],
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* ],
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* ];
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* @endcode
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* - Use file_save_upload() to trigger the FileUploadSanitizeNameEvent event and
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* \Drupal\file\Validation\FileValidatorInterface::validate().
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*
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* Important considerations, regardless of the form element used:
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* - Always use and validate against a list of allowed extensions.
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* - If the configuration system.file:allow_insecure_uploads is set to TRUE
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* then potentially insecure files will not be renamed. This setting is not
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* recommended.
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*
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* @see https://cheatsheetseries.owasp.org/cheatsheets/File_Upload_Cheat_Sheet.html
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* @see \Drupal\file\Validation\FileValidatorInterface
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* @see file_save_upload()
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* @see \Drupal\Core\File\Event\FileUploadSanitizeNameEvent
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* @see \Drupal\system\EventSubscriber\SecurityFileUploadEventSubscriber
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* @see \Drupal\file\Element\ManagedFile
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* @see \Drupal\Core\Render\Element\File
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*
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* @}
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*/
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/**
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* @addtogroup hooks
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* @{
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*/
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/**
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* Respond to a file that has been copied.
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*
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* @param \Drupal\file\FileInterface $file
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* The newly copied file entity.
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* @param \Drupal\file\FileInterface $source
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* The original file before the copy.
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*
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* @see \Drupal\file\FileRepositoryInterface::copy()
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*/
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function hook_file_copy(FileInterface $file, FileInterface $source): void {
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// Make sure that the file name starts with the owner's user name.
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if (!str_starts_with($file->getFilename(), $file->getOwner()->name)) {
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$file->setFilename($file->getOwner()->name . '_' . $file->getFilename());
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$file->save();
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\Drupal::logger('file')->notice('Copied file %source has been renamed to %destination', ['%source' => $source->filename, '%destination' => $file->getFilename()]);
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}
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}
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/**
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* Respond to a file that has been moved.
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*
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* @param \Drupal\file\FileInterface $file
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* The updated file entity after the move.
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* @param \Drupal\file\FileInterface $source
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* The original file entity before the move.
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*
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* @see \Drupal\file\FileRepositoryInterface::move()
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*/
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function hook_file_move(FileInterface $file, FileInterface $source): void {
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// Make sure that the file name starts with the owner's user name.
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if (!str_starts_with($file->getFilename(), $file->getOwner()->name)) {
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$file->setFilename($file->getOwner()->name . '_' . $file->getFilename());
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$file->save();
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\Drupal::logger('file')->notice('Moved file %source has been renamed to %destination', ['%source' => $source->filename, '%destination' => $file->getFilename()]);
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}
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}
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/**
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* @} End of "addtogroup hooks".
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*/
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