class FileUploadResource in Drupal 8

Same name and namespace in other branches

9 core/modules/file/src/Plugin/rest/resource/FileUploadResource.php \Drupal\file\Plugin\rest\resource\FileUploadResource

File upload resource.

This is implemented as a field-level resource for the following reasons:

Validation for uploaded files is tied to fields (allowed extensions, max size, etc..).
The actual files do not need to be stored in another temporary location, to be later moved when they are referenced from a file field.
Permission to upload a file can be determined by a users field level create access to the file field.

Plugin annotation


@RestResource(
  id = "file:upload",
  label = @Translation("File Upload"),
  serialization_class = "Drupal\file\Entity\File",
  uri_paths = {
    "https://www.drupal.org/link-relations/create" = "/file/upload/{entity_type_id}/{bundle}/{field_name}"
  }
)

Hierarchy

class \Drupal\Component\Plugin\PluginBase implements DerivativeInspectionInterface, PluginInspectionInterface
- class \Drupal\Core\Plugin\PluginBase uses DependencySerializationTrait, MessengerTrait, StringTranslationTrait
  - class \Drupal\rest\Plugin\ResourceBase implements ContainerFactoryPluginInterface, ResourceInterface
    class \Drupal\file\Plugin\rest\resource\FileUploadResource uses EntityResourceValidationTrait

Expanded class hierarchy of FileUploadResource

File

core/modules/file/src/Plugin/rest/resource/FileUploadResource.php, line 55

Namespace

Drupal\file\Plugin\rest\resource

View source

class FileUploadResource extends ResourceBase {
  use EntityResourceValidationTrait {
    validate as resourceValidate;
  }

  /**
   * The regex used to extract the filename from the content disposition header.
   *
   * @var string
   */
  const REQUEST_HEADER_FILENAME_REGEX = '@\\bfilename(?<star>\\*?)=\\"(?<filename>.+)\\"@';

  /**
   * The amount of bytes to read in each iteration when streaming file data.
   *
   * @var int
   */
  const BYTES_TO_READ = 8192;

  /**
   * The file system service.
   *
   * @var \Drupal\Core\File\FileSystem
   */
  protected $fileSystem;

  /**
   * The entity type manager.
   *
   * @var \Drupal\Core\Entity\EntityTypeManagerInterface
   */
  protected $entityTypeManager;

  /**
   * The entity field manager.
   *
   * @var \Drupal\Core\Entity\EntityFieldManagerInterface
   */
  protected $entityFieldManager;

  /**
   * The currently authenticated user.
   *
   * @var \Drupal\Core\Session\AccountInterface
   */
  protected $currentUser;

  /**
   * The MIME type guesser.
   *
   * @var \Symfony\Component\HttpFoundation\File\MimeType\MimeTypeGuesserInterface
   */
  protected $mimeTypeGuesser;

  /**
   * The token replacement instance.
   *
   * @var \Drupal\Core\Utility\Token
   */
  protected $token;

  /**
   * The lock service.
   *
   * @var \Drupal\Core\Lock\LockBackendInterface
   */
  protected $lock;

  /**
   * @var \Drupal\Core\Config\ImmutableConfig
   */
  protected $systemFileConfig;

  /**
   * Constructs a FileUploadResource instance.
   *
   * @param array $configuration
   *   A configuration array containing information about the plugin instance.
   * @param string $plugin_id
   *   The plugin_id for the plugin instance.
   * @param mixed $plugin_definition
   *   The plugin implementation definition.
   * @param array $serializer_formats
   *   The available serialization formats.
   * @param \Psr\Log\LoggerInterface $logger
   *   A logger instance.
   * @param \Drupal\Core\File\FileSystemInterface $file_system
   *   The file system service.
   * @param \Drupal\Core\Entity\EntityTypeManagerInterface $entity_type_manager
   *   The entity type manager.
   * @param \Drupal\Core\Entity\EntityFieldManagerInterface $entity_field_manager
   *   The entity field manager.
   * @param \Drupal\Core\Session\AccountInterface $current_user
   *   The currently authenticated user.
   * @param \Symfony\Component\HttpFoundation\File\MimeType\MimeTypeGuesserInterface $mime_type_guesser
   *   The MIME type guesser.
   * @param \Drupal\Core\Utility\Token $token
   *   The token replacement instance.
   * @param \Drupal\Core\Lock\LockBackendInterface $lock
   *   The lock service.
   * @param \Drupal\Core\Config\Config $system_file_config
   *   The system file configuration.
   */
  public function __construct(array $configuration, $plugin_id, $plugin_definition, $serializer_formats, LoggerInterface $logger, FileSystemInterface $file_system, EntityTypeManagerInterface $entity_type_manager, EntityFieldManagerInterface $entity_field_manager, AccountInterface $current_user, MimeTypeGuesserInterface $mime_type_guesser, Token $token, LockBackendInterface $lock, Config $system_file_config) {
    parent::__construct($configuration, $plugin_id, $plugin_definition, $serializer_formats, $logger);
    $this->fileSystem = $file_system;
    $this->entityTypeManager = $entity_type_manager;
    $this->entityFieldManager = $entity_field_manager;
    $this->currentUser = $current_user;
    $this->mimeTypeGuesser = $mime_type_guesser;
    $this->token = $token;
    $this->lock = $lock;
    $this->systemFileConfig = $system_file_config;
  }

  /**
   * {@inheritdoc}
   */
  public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition) {
    return new static($configuration, $plugin_id, $plugin_definition, $container
      ->getParameter('serializer.formats'), $container
      ->get('logger.factory')
      ->get('rest'), $container
      ->get('file_system'), $container
      ->get('entity_type.manager'), $container
      ->get('entity_field.manager'), $container
      ->get('current_user'), $container
      ->get('file.mime_type.guesser'), $container
      ->get('token'), $container
      ->get('lock'), $container
      ->get('config.factory')
      ->get('system.file'));
  }

  /**
   * {@inheritdoc}
   */
  public function permissions() {

    // Access to this resource depends on field-level access so no explicit
    // permissions are required.
    // @see \Drupal\file\Plugin\rest\resource\FileUploadResource::validateAndLoadFieldDefinition()
    // @see \Drupal\rest\Plugin\rest\resource\EntityResource::permissions()
    return [];
  }

  /**
   * Creates a file from an endpoint.
   *
   * @param \Symfony\Component\HttpFoundation\Request $request
   *   The current request.
   * @param string $entity_type_id
   *   The entity type ID.
   * @param string $bundle
   *   The entity bundle. This will be the same as $entity_type_id for entity
   *   types that don't support bundles.
   * @param string $field_name
   *   The field name.
   *
   * @return \Drupal\rest\ModifiedResourceResponse
   *   A 201 response, on success.
   *
   * @throws \Symfony\Component\HttpKernel\Exception\HttpException
   *   Thrown when temporary files cannot be written, a lock cannot be acquired,
   *   or when temporary files cannot be moved to their new location.
   */
  public function post(Request $request, $entity_type_id, $bundle, $field_name) {
    $filename = $this
      ->validateAndParseContentDispositionHeader($request);
    $field_definition = $this
      ->validateAndLoadFieldDefinition($entity_type_id, $bundle, $field_name);
    $destination = $this
      ->getUploadLocation($field_definition
      ->getSettings());

    // Check the destination file path is writable.
    if (!$this->fileSystem
      ->prepareDirectory($destination, FileSystemInterface::CREATE_DIRECTORY)) {
      throw new HttpException(500, 'Destination file path is not writable');
    }
    $validators = $this
      ->getUploadValidators($field_definition);
    $prepared_filename = $this
      ->prepareFilename($filename, $validators);

    // Create the file.
    $file_uri = "{$destination}/{$prepared_filename}";
    $temp_file_path = $this
      ->streamUploadData();
    $file_uri = $this->fileSystem
      ->getDestinationFilename($file_uri, FileSystemInterface::EXISTS_RENAME);

    // Lock based on the prepared file URI.
    $lock_id = $this
      ->generateLockIdFromFileUri($file_uri);
    if (!$this->lock
      ->acquire($lock_id)) {
      throw new HttpException(503, sprintf('File "%s" is already locked for writing'), NULL, [
        'Retry-After' => 1,
      ]);
    }

    // Begin building file entity.
    $file = File::create([]);
    $file
      ->setOwnerId($this->currentUser
      ->id());
    $file
      ->setFilename($prepared_filename);
    $file
      ->setMimeType($this->mimeTypeGuesser
      ->guess($prepared_filename));
    $file
      ->setFileUri($file_uri);

    // Set the size. This is done in File::preSave() but we validate the file
    // before it is saved.
    $file
      ->setSize(@filesize($temp_file_path));

    // Validate the file entity against entity-level validation and field-level
    // validators.
    $this
      ->validate($file, $validators);

    // Move the file to the correct location after validation. Use
    // FileSystemInterface::EXISTS_ERROR as the file location has already been
    // determined above in FileSystem::getDestinationFilename().
    try {
      $this->fileSystem
        ->move($temp_file_path, $file_uri, FileSystemInterface::EXISTS_ERROR);
    } catch (FileException $e) {
      throw new HttpException(500, 'Temporary file could not be moved to file location');
    }
    $file
      ->save();
    $this->lock
      ->release($lock_id);

    // 201 Created responses return the newly created entity in the response
    // body. These responses are not cacheable, so we add no cacheability
    // metadata here.
    return new ModifiedResourceResponse($file, 201);
  }

  /**
   * Streams file upload data to temporary file and moves to file destination.
   *
   * @return string
   *   The temp file path.
   *
   * @throws \Symfony\Component\HttpKernel\Exception\HttpException
   *   Thrown when input data cannot be read, the temporary file cannot be
   *   opened, or the temporary file cannot be written.
   */
  protected function streamUploadData() {

    // 'rb' is needed so reading works correctly on Windows environments too.
    $file_data = fopen('php://input', 'rb');
    $temp_file_path = $this->fileSystem
      ->tempnam('temporary://', 'file');
    $temp_file = fopen($temp_file_path, 'wb');
    if ($temp_file) {
      while (!feof($file_data)) {
        $read = fread($file_data, static::BYTES_TO_READ);
        if ($read === FALSE) {

          // Close the file streams.
          fclose($temp_file);
          fclose($file_data);
          $this->logger
            ->error('Input data could not be read');
          throw new HttpException(500, 'Input file data could not be read');
        }
        if (fwrite($temp_file, $read) === FALSE) {

          // Close the file streams.
          fclose($temp_file);
          fclose($file_data);
          $this->logger
            ->error('Temporary file data for "%path" could not be written', [
            '%path' => $temp_file_path,
          ]);
          throw new HttpException(500, 'Temporary file data could not be written');
        }
      }

      // Close the temp file stream.
      fclose($temp_file);
    }
    else {

      // Close the input file stream since we can't proceed with the upload.
      // Don't try to close $temp_file since it's FALSE at this point.
      fclose($file_data);
      $this->logger
        ->error('Temporary file "%path" could not be opened for file upload', [
        '%path' => $temp_file_path,
      ]);
      throw new HttpException(500, 'Temporary file could not be opened');
    }

    // Close the input stream.
    fclose($file_data);
    return $temp_file_path;
  }

  /**
   * Validates and extracts the filename from the Content-Disposition header.
   *
   * @param \Symfony\Component\HttpFoundation\Request $request
   *   The request object.
   *
   * @return string
   *   The filename extracted from the header.
   *
   * @throws \Symfony\Component\HttpKernel\Exception\BadRequestHttpException
   *   Thrown when the 'Content-Disposition' request header is invalid.
   */
  protected function validateAndParseContentDispositionHeader(Request $request) {

    // Firstly, check the header exists.
    if (!$request->headers
      ->has('content-disposition')) {
      throw new BadRequestHttpException('"Content-Disposition" header is required. A file name in the format "filename=FILENAME" must be provided');
    }
    $content_disposition = $request->headers
      ->get('content-disposition');

    // Parse the header value. This regex does not allow an empty filename.
    // i.e. 'filename=""'. This also matches on a word boundary so other keys
    // like 'not_a_filename' don't work.
    if (!preg_match(static::REQUEST_HEADER_FILENAME_REGEX, $content_disposition, $matches)) {
      throw new BadRequestHttpException('No filename found in "Content-Disposition" header. A file name in the format "filename=FILENAME" must be provided');
    }

    // Check for the "filename*" format. This is currently unsupported.
    if (!empty($matches['star'])) {
      throw new BadRequestHttpException('The extended "filename*" format is currently not supported in the "Content-Disposition" header');
    }

    // Don't validate the actual filename here, that will be done by the upload
    // validators in validate().
    // @see \Drupal\file\Plugin\rest\resource\FileUploadResource::validate()
    $filename = $matches['filename'];

    // Make sure only the filename component is returned. Path information is
    // stripped as per https://tools.ietf.org/html/rfc6266#section-4.3.
    return $this->fileSystem
      ->basename($filename);
  }

  /**
   * Validates and loads a field definition instance.
   *
   * @param string $entity_type_id
   *   The entity type ID the field is attached to.
   * @param string $bundle
   *   The bundle the field is attached to.
   * @param string $field_name
   *   The field name.
   *
   * @return \Drupal\Core\Field\FieldDefinitionInterface
   *   The field definition.
   *
   * @throws \Symfony\Component\HttpKernel\Exception\BadRequestHttpException
   *   Thrown when the field does not exist.
   * @throws \Symfony\Component\HttpFoundation\File\Exception\AccessDeniedException
   *   Thrown when the target type of the field is not a file, or the current
   *   user does not have 'edit' access for the field.
   */
  protected function validateAndLoadFieldDefinition($entity_type_id, $bundle, $field_name) {
    $field_definitions = $this->entityFieldManager
      ->getFieldDefinitions($entity_type_id, $bundle);
    if (!isset($field_definitions[$field_name])) {
      throw new NotFoundHttpException(sprintf('Field "%s" does not exist', $field_name));
    }

    /** @var \Drupal\Core\Field\FieldDefinitionInterface $field_definition */
    $field_definition = $field_definitions[$field_name];
    if ($field_definition
      ->getSetting('target_type') !== 'file') {
      throw new AccessDeniedHttpException(sprintf('"%s" is not a file field', $field_name));
    }
    $entity_access_control_handler = $this->entityTypeManager
      ->getAccessControlHandler($entity_type_id);
    $bundle = $this->entityTypeManager
      ->getDefinition($entity_type_id)
      ->hasKey('bundle') ? $bundle : NULL;
    $access_result = $entity_access_control_handler
      ->createAccess($bundle, NULL, [], TRUE)
      ->andIf($entity_access_control_handler
      ->fieldAccess('edit', $field_definition, NULL, NULL, TRUE));
    if (!$access_result
      ->isAllowed()) {
      throw new AccessDeniedHttpException($access_result
        ->getReason());
    }
    return $field_definition;
  }

  /**
   * Validates the file.
   *
   * @param \Drupal\file\FileInterface $file
   *   The file entity to validate.
   * @param array $validators
   *   An array of upload validators to pass to file_validate().
   *
   * @throws \Symfony\Component\HttpKernel\Exception\UnprocessableEntityHttpException
   *   Thrown when there are file validation errors.
   */
  protected function validate(FileInterface $file, array $validators) {
    $this
      ->resourceValidate($file);

    // Validate the file based on the field definition configuration.
    $errors = file_validate($file, $validators);
    if (!empty($errors)) {
      $message = "Unprocessable Entity: file validation failed.\n";
      $message .= implode("\n", array_map(function ($error) {
        return PlainTextOutput::renderFromHtml($error);
      }, $errors));
      throw new UnprocessableEntityHttpException($message);
    }
  }

  /**
   * Prepares the filename to strip out any malicious extensions.
   *
   * @param string $filename
   *   The file name.
   * @param array $validators
   *   The array of upload validators.
   *
   * @return string
   *   The prepared/munged filename.
   */
  protected function prepareFilename($filename, array &$validators) {

    // Don't rename if 'allow_insecure_uploads' evaluates to TRUE.
    if (!$this->systemFileConfig
      ->get('allow_insecure_uploads')) {
      if (!empty($validators['file_validate_extensions'][0])) {

        // If there is a file_validate_extensions validator and a list of
        // valid extensions, munge the filename to protect against possible
        // malicious extension hiding within an unknown file type. For example,
        // "filename.html.foo".
        $filename = file_munge_filename($filename, $validators['file_validate_extensions'][0]);
      }

      // Rename potentially executable files, to help prevent exploits (i.e.
      // will rename filename.php.foo and filename.php to filename._php._foo.txt
      // and filename._php.txt, respectively).
      if (preg_match(FILE_INSECURE_EXTENSION_REGEX, $filename)) {

        // If the file will be rejected anyway due to a disallowed extension, it
        // should not be renamed; rather, we'll let file_validate_extensions()
        // reject it below.
        $passes_validation = FALSE;
        if (!empty($validators['file_validate_extensions'][0])) {
          $file = File::create([]);
          $file
            ->setFilename($filename);
          $passes_validation = empty(file_validate_extensions($file, $validators['file_validate_extensions'][0]));
        }
        if (empty($validators['file_validate_extensions'][0]) || $passes_validation) {
          if (substr($filename, -4) != '.txt') {

            // The destination filename will also later be used to create the URI.
            $filename .= '.txt';
          }
          $filename = file_munge_filename($filename, $validators['file_validate_extensions'][0] ?? '');

          // The .txt extension may not be in the allowed list of extensions. We
          // have to add it here or else the file upload will fail.
          if (!empty($validators['file_validate_extensions'][0])) {
            $validators['file_validate_extensions'][0] .= ' txt';
          }
        }
      }
    }
    return $filename;
  }

  /**
   * Determines the URI for a file field.
   *
   * @param array $settings
   *   The array of field settings.
   *
   * @return string
   *   An un-sanitized file directory URI with tokens replaced. The result of
   *   the token replacement is then converted to plain text and returned.
   */
  protected function getUploadLocation(array $settings) {
    $destination = trim($settings['file_directory'], '/');

    // Replace tokens. As the tokens might contain HTML we convert it to plain
    // text.
    $destination = PlainTextOutput::renderFromHtml($this->token
      ->replace($destination, []));
    return $settings['uri_scheme'] . '://' . $destination;
  }

  /**
   * Retrieves the upload validators for a field definition.
   *
   * This is copied from \Drupal\file\Plugin\Field\FieldType\FileItem as there
   * is no entity instance available here that a FileItem would exist for.
   *
   * @param \Drupal\Core\Field\FieldDefinitionInterface $field_definition
   *   The field definition for which to get validators.
   *
   * @return array
   *   An array suitable for passing to file_save_upload() or the file field
   *   element's '#upload_validators' property.
   */
  protected function getUploadValidators(FieldDefinitionInterface $field_definition) {
    $validators = [
      // Add in our check of the file name length.
      'file_validate_name_length' => [],
    ];
    $settings = $field_definition
      ->getSettings();

    // Cap the upload size according to the PHP limit.
    $max_filesize = Bytes::toInt(Environment::getUploadMaxSize());
    if (!empty($settings['max_filesize'])) {
      $max_filesize = min($max_filesize, Bytes::toInt($settings['max_filesize']));
    }

    // There is always a file size limit due to the PHP server limit.
    $validators['file_validate_size'] = [
      $max_filesize,
    ];

    // Add the extension check if necessary.
    if (!empty($settings['file_extensions'])) {
      $validators['file_validate_extensions'] = [
        $settings['file_extensions'],
      ];
    }
    return $validators;
  }

  /**
   * {@inheritdoc}
   */
  protected function getBaseRoute($canonical_path, $method) {
    return new Route($canonical_path, [
      '_controller' => RequestHandler::class . '::handleRaw',
    ], $this
      ->getBaseRouteRequirements($method), [], '', [], [
      $method,
    ]);
  }

  /**
   * {@inheritdoc}
   */
  protected function getBaseRouteRequirements($method) {
    $requirements = parent::getBaseRouteRequirements($method);

    // Add the content type format access check. This will enforce that all
    // incoming requests can only use the 'application/octet-stream'
    // Content-Type header.
    $requirements['_content_type_format'] = 'bin';
    return $requirements;
  }

  /**
   * Generates a lock ID based on the file URI.
   *
   * @param $file_uri
   *   The file URI.
   *
   * @return string
   *   The generated lock ID.
   */
  protected static function generateLockIdFromFileUri($file_uri) {
    return 'file:rest:' . Crypt::hashBase64($file_uri);
  }

}

Members

Name	Modifiers	Type	Description	Overrides
DependencySerializationTrait::$_entityStorages	protected	property	An array of entity type IDs keyed by the property name of their storages.
DependencySerializationTrait::$_serviceIds	protected	property	An array of service IDs keyed by property name used for serialization.
DependencySerializationTrait::__sleep	public	function		1
DependencySerializationTrait::__wakeup	public	function		2
EntityResourceValidationTrait::validate	protected	function	Verifies that an entity does not violate any validation constraints. Aliased as: resourceValidate
FileUploadResource::$currentUser	protected	property	The currently authenticated user.
FileUploadResource::$entityFieldManager	protected	property	The entity field manager.
FileUploadResource::$entityTypeManager	protected	property	The entity type manager.
FileUploadResource::$fileSystem	protected	property	The file system service.
FileUploadResource::$lock	protected	property	The lock service.
FileUploadResource::$mimeTypeGuesser	protected	property	The MIME type guesser.
FileUploadResource::$systemFileConfig	protected	property
FileUploadResource::$token	protected	property	The token replacement instance.
FileUploadResource::BYTES_TO_READ		constant	The amount of bytes to read in each iteration when streaming file data.
FileUploadResource::create	public static	function	Creates an instance of the plugin. Overrides ResourceBase::create
FileUploadResource::generateLockIdFromFileUri	protected static	function	Generates a lock ID based on the file URI.
FileUploadResource::getBaseRoute	protected	function	Gets the base route for a particular method. Overrides ResourceBase::getBaseRoute
FileUploadResource::getBaseRouteRequirements	protected	function	Gets the base route requirements for a particular method. Overrides ResourceBase::getBaseRouteRequirements
FileUploadResource::getUploadLocation	protected	function	Determines the URI for a file field.
FileUploadResource::getUploadValidators	protected	function	Retrieves the upload validators for a field definition.
FileUploadResource::permissions	public	function	Implements ResourceInterface::permissions(). Overrides ResourceBase::permissions
FileUploadResource::post	public	function	Creates a file from an endpoint.
FileUploadResource::prepareFilename	protected	function	Prepares the filename to strip out any malicious extensions.
FileUploadResource::REQUEST_HEADER_FILENAME_REGEX		constant	The regex used to extract the filename from the content disposition header.
FileUploadResource::streamUploadData	protected	function	Streams file upload data to temporary file and moves to file destination.
FileUploadResource::validate	protected	function	Validates the file.
FileUploadResource::validateAndLoadFieldDefinition	protected	function	Validates and loads a field definition instance.
FileUploadResource::validateAndParseContentDispositionHeader	protected	function	Validates and extracts the filename from the Content-Disposition header.
FileUploadResource::__construct	public	function	Constructs a FileUploadResource instance. Overrides ResourceBase::__construct
MessengerTrait::$messenger	protected	property	The messenger.	29
MessengerTrait::messenger	public	function	Gets the messenger.	29
MessengerTrait::setMessenger	public	function	Sets the messenger.
PluginBase::$configuration	protected	property	Configuration information passed into the plugin.	1
PluginBase::$pluginDefinition	protected	property	The plugin implementation definition.	1
PluginBase::$pluginId	protected	property	The plugin_id.
PluginBase::DERIVATIVE_SEPARATOR		constant	A string which is used to separate base plugin IDs from the derivative ID.
PluginBase::getBaseId	public	function	Gets the base_plugin_id of the plugin instance. Overrides DerivativeInspectionInterface::getBaseId
PluginBase::getDerivativeId	public	function	Gets the derivative_id of the plugin instance. Overrides DerivativeInspectionInterface::getDerivativeId
PluginBase::getPluginDefinition	public	function	Gets the definition of the plugin implementation. Overrides PluginInspectionInterface::getPluginDefinition	3
PluginBase::getPluginId	public	function	Gets the plugin_id of the plugin instance. Overrides PluginInspectionInterface::getPluginId
PluginBase::isConfigurable	public	function	Determines if the plugin is configurable.
ResourceBase::$logger	protected	property	A logger instance.
ResourceBase::$serializerFormats	protected	property	The available serialization formats.
ResourceBase::availableMethods	public	function	Returns the available HTTP request methods on this plugin. Overrides ResourceInterface::availableMethods	1
ResourceBase::requestMethods	protected	function	Provides predefined HTTP request methods.
ResourceBase::routes	public	function	Returns a collection of routes with URL path information for the resource. Overrides ResourceInterface::routes
StringTranslationTrait::$stringTranslation	protected	property	The string translation service.	1
StringTranslationTrait::formatPlural	protected	function	Formats a string containing a count of items.
StringTranslationTrait::getNumberOfPlurals	protected	function	Returns the number of plurals supported by a given language.
StringTranslationTrait::getStringTranslation	protected	function	Gets the string translation service.
StringTranslationTrait::setStringTranslation	public	function	Sets the string translation service to use.	2
StringTranslationTrait::t	protected	function	Translates a string to the current language or to a given language.

You are here

class FileUploadResource in Drupal 8

Plugin annotation

Hierarchy

File

Namespace

Members

API Navigation