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<?php
/**
* @file
* Defines a "managed_file" Form API field and a "file" field for Field module.
*/
use Drupal\Component\Utility\SafeMarkup;
use Drupal\Component\Utility\String;
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use Drupal\Core\Field\FieldDefinitionInterface;
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use Drupal\Core\Form\FormStateInterface;
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use Drupal\Core\Render\Element;
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use Drupal\Core\Routing\RouteMatchInterface;
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use Drupal\Core\Url;
use Drupal\file\Entity\File;
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use Drupal\file\FileInterface;
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use Drupal\Component\Utility\NestedArray;
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use Drupal\Component\Utility\Unicode;
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use Drupal\Core\Entity\EntityStorageInterface;
use Drupal\Core\Template\Attribute;
use Drupal\file\FileUsage\FileUsageInterface;
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// Load all Field module hooks for File.
require_once __DIR__ . '/file.field.inc';
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/**
* Implements hook_help().
*/
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function file_help($route_name, RouteMatchInterface $route_match) {
switch ($route_name) {
case 'help.page.file':
$output = '';
$output .= '<h3>' . t('About') . '</h3>';
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$output .= '<p>' . t('The File module allows you to create fields that contain files. See the <a href="!field">Field module help</a> and the <a href="!field_ui">Field UI help</a> pages for general information on fields and how to create and manage them. For more information, see the <a href="!file_documentation">online documentation for the File module</a>.', array('!field' => \Drupal::url('help.page', array('name' => 'field')), '!field_ui' => \Drupal::url('help.page', array('name' => 'field_ui')), '!file_documentation' => 'https://drupal.org/documentation/modules/file')) . '</p>';
$output .= '<h3>' . t('Uses') . '</h3>';
$output .= '<dl>';
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$output .= '<dt>' . t('Managing and displaying file fields') . '</dt>';
$output .= '<dd>' . t('The <em>settings</em> and the <em>display</em> of the file field can be configured separately. See the <a href="!field_ui">Field UI help</a> for more information on how to manage fields and their display.', array('!field_ui' => \Drupal::url('help.page', array('name' => 'field_ui')))) . '</dd>';
$output .= '<dt>' . t('Allowing file extensions') . '</dt>';
$output .= '<dd>' . t('In the field settings, you can define the allowed file extensions (for example <em>pdf docx psd</em>) for the files that will be uploaded with the file field.') . '</dd>';
$output .= '<dt>' . t('Storing files ') . '</dt>';
$output .= '<dd>' . t('Uploaded files can either be stored as <em>public</em> or <em>private</em>, depending on the <a href="!file-system">File system settings</a>. For more information, see the <a href="!system-help">System module help page</a>.', array('!file-system' => \Drupal::url('system.file_system_settings'), '!system-help' => \Drupal::url('help.page', array('name' => 'system')))) . '</dd>';
$output .= '<dt>' . t('Restricting the maximum file size') . '</dt>';
$output .= '<dd>' . t('The maximum file size that users can upload is limited by PHP settings of the server, but you can restrict by entering the desired value as the <em>Maximum upload size</em> setting. The maximum file size is automatically displayed to users in the help text of the file field.') . '</dd>';
$output .= '<dt>' . t('Displaying files and descriptions') . '<dt>';
$output .= '<dd>' . t('In the field settings, you can allow users to toggle whether individual files are displayed. In the display settings, you can then choose one of the following formats: <ul><li><em>Generic file</em> displays links to the files and adds icons that symbolize the file extensions. If <em>descriptions</em> are enabled and have been submitted, then the description is displayed instead of the file name.</li><li><em>URL to file</em> displays the full path to the file as plain text.</li><li><em>Table of files</em> lists links to the files and the file sizes in a table.</li><li><em>RSS enclosure</em> only displays the first file, and only in a RSS feed, formatted according to the RSS 2.0 syntax for enclosures.</li></ul> A file can still be linked to directly by its URI even if it is not displayed.') . '</dd>';
$output .= '</dl>';
return $output;
}
}
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/**
* Loads file entities from the database.
*
* @param array $fids
* (optional) An array of entity IDs. If omitted, all entities are loaded.
* @param $reset
* Whether to reset the internal file_load_multiple() cache.
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*
* @return array
* An array of file entities, indexed by fid.
*
* @deprecated in Drupal 8.x, will be removed before Drupal 9.0.
* Use \Drupal\file\Entity\File::loadMultiple().
*
* @see hook_ENTITY_TYPE_load()
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* @see file_load()
* @see entity_load()
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* @see \Drupal\Core\Entity\Query\EntityQueryInterface
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*/
function file_load_multiple(array $fids = NULL, $reset = FALSE) {
if ($reset) {
\Drupal::entityManager()->getStorage('file')->resetCache($fids);
}
return File::loadMultiple($fids);
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}
/**
* Loads a single file entity from the database.
*
* @param $fid
* A file ID.
* @param $reset
* Whether to reset the internal file_load_multiple() cache.
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*
* @return \Drupal\file\FileInterface
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* A file entity or NULL if the file was not found.
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*
* @deprecated in Drupal 8.x, will be removed before Drupal 9.0.
* Use \Drupal\file\Entity\File::load().
*
* @see hook_ENTITY_TYPE_load()
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* @see file_load_multiple()
*/
function file_load($fid, $reset = FALSE) {
if ($reset) {
\Drupal::entityManager()->getStorage('file')->resetCache(array($fid));
}
return File::load($fid);
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}
/**
* Copies a file to a new location and adds a file record to the database.
*
* This function should be used when manipulating files that have records
* stored in the database. This is a powerful function that in many ways
* performs like an advanced version of copy().
* - Checks if $source and $destination are valid and readable/writable.
* - If file already exists in $destination either the call will error out,
* replace the file or rename the file based on the $replace parameter.
* - If the $source and $destination are equal, the behavior depends on the
* $replace parameter. FILE_EXISTS_REPLACE will error out. FILE_EXISTS_RENAME
* will rename the file until the $destination is unique.
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* - Adds the new file to the files database. If the source file is a
* temporary file, the resulting file will also be a temporary file. See
* file_save_upload() for details on temporary files.
*
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* @param \Drupal\file\FileInterface $source
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* A file entity.
* @param $destination
* A string containing the destination that $source should be copied to.
* This must be a stream wrapper URI.
* @param $replace
* Replace behavior when the destination file already exists:
* - FILE_EXISTS_REPLACE - Replace the existing file. If a managed file with
* the destination name exists then its database entry will be updated. If
* no database entry is found then a new one will be created.
* - FILE_EXISTS_RENAME - Append _{incrementing number} until the filename is
* unique.
* - FILE_EXISTS_ERROR - Do nothing and return FALSE.
*
* @return
* File object if the copy is successful, or FALSE in the event of an error.
*
* @see file_unmanaged_copy()
* @see hook_file_copy()
*/
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function file_copy(FileInterface $source, $destination = NULL, $replace = FILE_EXISTS_RENAME) {
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if (!file_valid_uri($destination)) {
if (($realpath = drupal_realpath($source->getFileUri())) !== FALSE) {
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\Drupal::logger('file')->notice('File %file (%realpath) could not be copied because the destination %destination is invalid. This is often caused by improper use of file_copy() or a missing stream wrapper.', array('%file' => $source->getFileUri(), '%realpath' => $realpath, '%destination' => $destination));
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}
else {
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\Drupal::logger('file')->notice('File %file could not be copied because the destination %destination is invalid. This is often caused by improper use of file_copy() or a missing stream wrapper.', array('%file' => $source->getFileUri(), '%destination' => $destination));
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}
drupal_set_message(t('The specified file %file could not be copied because the destination is invalid. More information is available in the system log.', array('%file' => $source->getFileUri())), 'error');
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return FALSE;
}
if ($uri = file_unmanaged_copy($source->getFileUri(), $destination, $replace)) {
$file = $source->createDuplicate();
$file->setFileUri($uri);
$file->setFilename(drupal_basename($uri));
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// If we are replacing an existing file re-use its database record.
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// @todo Do not create a new entity in order to update it, see
// https://drupal.org/node/2241865
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if ($replace == FILE_EXISTS_REPLACE) {
$existing_files = entity_load_multiple_by_properties('file', array('uri' => $uri));
if (count($existing_files)) {
$existing = reset($existing_files);
$file->fid = $existing->id();
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$file->setOriginalId($existing->id());
$file->setFilename($existing->getFilename());
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}
}
// If we are renaming around an existing file (rather than a directory),
// use its basename for the filename.
elseif ($replace == FILE_EXISTS_RENAME && is_file($destination)) {
$file->setFilename(drupal_basename($destination));
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}
$file->save();
// Inform modules that the file has been copied.
\Drupal::moduleHandler()->invokeAll('file_copy', array($file, $source));
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return $file;
}
return FALSE;
}
/**
* Moves a file to a new location and update the file's database entry.
*
* Moving a file is performed by copying the file to the new location and then
* deleting the original.
* - Checks if $source and $destination are valid and readable/writable.
* - Performs a file move if $source is not equal to $destination.
* - If file already exists in $destination either the call will error out,
* replace the file or rename the file based on the $replace parameter.
* - Adds the new file to the files database.
*
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* @param \Drupal\file\FileInterface $source
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* A file entity.
* @param $destination
* A string containing the destination that $source should be moved to.
* This must be a stream wrapper URI.
* @param $replace
* Replace behavior when the destination file already exists:
* - FILE_EXISTS_REPLACE - Replace the existing file. If a managed file with
* the destination name exists then its database entry will be updated and
* $source->delete() called after invoking hook_file_move().
* If no database entry is found then the source files record will be
* updated.
* - FILE_EXISTS_RENAME - Append _{incrementing number} until the filename is
* unique.
* - FILE_EXISTS_ERROR - Do nothing and return FALSE.
*
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* @return \Drupal\file\FileInterface
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* Resulting file entity for success, or FALSE in the event of an error.
*
* @see file_unmanaged_move()
* @see hook_file_move()
*/
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function file_move(FileInterface $source, $destination = NULL, $replace = FILE_EXISTS_RENAME) {
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if (!file_valid_uri($destination)) {
if (($realpath = drupal_realpath($source->getFileUri())) !== FALSE) {
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\Drupal::logger('file')->notice('File %file (%realpath) could not be moved because the destination %destination is invalid. This may be caused by improper use of file_move() or a missing stream wrapper.', array('%file' => $source->getFileUri(), '%realpath' => $realpath, '%destination' => $destination));
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}
else {
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\Drupal::logger('file')->notice('File %file could not be moved because the destination %destination is invalid. This may be caused by improper use of file_move() or a missing stream wrapper.', array('%file' => $source->getFileUri(), '%destination' => $destination));
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}
drupal_set_message(t('The specified file %file could not be moved because the destination is invalid. More information is available in the system log.', array('%file' => $source->getFileUri())), 'error');
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return FALSE;
}
if ($uri = file_unmanaged_move($source->getFileUri(), $destination, $replace)) {
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$delete_source = FALSE;
$file = clone $source;
$file->setFileUri($uri);
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// If we are replacing an existing file re-use its database record.
if ($replace == FILE_EXISTS_REPLACE) {
$existing_files = entity_load_multiple_by_properties('file', array('uri' => $uri));
if (count($existing_files)) {
$existing = reset($existing_files);
$delete_source = TRUE;
$file->fid = $existing->id();
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$file->uuid = $existing->uuid();
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}
}
// If we are renaming around an existing file (rather than a directory),
// use its basename for the filename.
elseif ($replace == FILE_EXISTS_RENAME && is_file($destination)) {
$file->setFilename(drupal_basename($destination));
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}
$file->save();
// Inform modules that the file has been moved.
\Drupal::moduleHandler()->invokeAll('file_move', array($file, $source));
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// Delete the original if it's not in use elsewhere.
if ($delete_source && !\Drupal::service('file.usage')->listUsage($source)) {
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$source->delete();
}
return $file;
}
return FALSE;
}
/**
* Checks that a file meets the criteria specified by the validators.
*
* After executing the validator callbacks specified hook_file_validate() will
* also be called to allow other modules to report errors about the file.
*
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* @param \Drupal\file\FileInterface $file
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* A file entity.
* @param $validators
* An optional, associative array of callback functions used to validate the
* file. The keys are function names and the values arrays of callback
* parameters which will be passed in after the file entity. The
* functions should return an array of error messages; an empty array
* indicates that the file passed validation. The functions will be called in
* the order specified.
*
* @return
* An array containing validation error messages.
*
* @see hook_file_validate()
*/
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function file_validate(FileInterface $file, $validators = array()) {
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// Call the validation functions specified by this function's caller.
$errors = array();
foreach ($validators as $function => $args) {
if (function_exists($function)) {
array_unshift($args, $file);
$errors = array_merge($errors, call_user_func_array($function, $args));
}
}
// Let other modules perform validation on the new file.
return array_merge($errors, \Drupal::moduleHandler()->invokeAll('file_validate', array($file)));
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}
/**
* Checks for files with names longer than can be stored in the database.
*
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* @param \Drupal\file\FileInterface $file
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* A file entity.
*
* @return
* An array. If the file name is too long, it will contain an error message.
*/
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function file_validate_name_length(FileInterface $file) {
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$errors = array();
if (!$file->getFilename()) {
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$errors[] = t("The file's name is empty. Please give a name to the file.");
}
if (strlen($file->getFilename()) > 240) {
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$errors[] = t("The file's name exceeds the 240 characters limit. Please rename the file and try again.");
}
return $errors;
}
/**
* Checks that the filename ends with an allowed extension.
*
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* @param \Drupal\file\FileInterface $file
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* A file entity.
* @param $extensions
* A string with a space separated list of allowed extensions.
*
* @return
* An array. If the file extension is not allowed, it will contain an error
* message.
*
* @see hook_file_validate()
*/
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function file_validate_extensions(FileInterface $file, $extensions) {
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$errors = array();
$regex = '/\.(' . preg_replace('/ +/', '|', preg_quote($extensions)) . ')$/i';
if (!preg_match($regex, $file->getFilename())) {
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$errors[] = t('Only files with the following extensions are allowed: %files-allowed.', array('%files-allowed' => $extensions));
}
return $errors;
}
/**
* Checks that the file's size is below certain limits.
*
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* @param \Drupal\file\FileInterface $file
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* A file entity.
* @param $file_limit
* An integer specifying the maximum file size in bytes. Zero indicates that
* no limit should be enforced.
* @param $user_limit
* An integer specifying the maximum number of bytes the user is allowed.
* Zero indicates that no limit should be enforced.
*
* @return
* An array. If the file size exceeds limits, it will contain an error
* message.
*
* @see hook_file_validate()
*/
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function file_validate_size(FileInterface $file, $file_limit = 0, $user_limit = 0) {
$user = \Drupal::currentUser();
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$errors = array();
if ($file_limit && $file->getSize() > $file_limit) {
$errors[] = t('The file is %filesize exceeding the maximum file size of %maxsize.', array('%filesize' => format_size($file->getSize()), '%maxsize' => format_size($file_limit)));
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}
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// Save a query by only calling spaceUsed() when a limit is provided.
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if ($user_limit && (\Drupal::entityManager()->getStorage('file')->spaceUsed($user->id()) + $file->getSize()) > $user_limit) {
$errors[] = t('The file is %filesize which would exceed your disk quota of %quota.', array('%filesize' => format_size($file->getSize()), '%quota' => format_size($user_limit)));
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}
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return $errors;
}
/**
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* Checks that the file is recognized as a valid image.
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*
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* @param \Drupal\file\FileInterface $file
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* A file entity.
*
* @return
* An array. If the file is not an image, it will contain an error message.
*
* @see hook_file_validate()
*/
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function file_validate_is_image(FileInterface $file) {
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$errors = array();
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$image_factory = \Drupal::service('image.factory');
$image = $image_factory->get($file->getFileUri());
if (!$image->isValid()) {
$supported_extensions = $image_factory->getSupportedExtensions();
$errors[] = t('Image type not supported. Allowed types: %types', array('%types' => implode(' ', $supported_extensions)));
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}
return $errors;
}
/**
* Verifies that image dimensions are within the specified maximum and minimum.
*
* Non-image files will be ignored. If a image toolkit is available the image
* will be scaled to fit within the desired maximum dimensions.
*
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* @param \Drupal\file\FileInterface $file
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* A file entity. This function may resize the file affecting its size.
* @param $maximum_dimensions
* An optional string in the form WIDTHxHEIGHT e.g. '640x480' or '85x85'. If
* an image toolkit is installed the image will be resized down to these
* dimensions. A value of 0 indicates no restriction on size, so resizing
* will be attempted.
* @param $minimum_dimensions
* An optional string in the form WIDTHxHEIGHT. This will check that the
* image meets a minimum size. A value of 0 indicates no restriction.
*
* @return
* An array. If the file is an image and did not meet the requirements, it
* will contain an error message.
*
* @see hook_file_validate()
*/
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function file_validate_image_resolution(FileInterface $file, $maximum_dimensions = 0, $minimum_dimensions = 0) {
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$errors = array();
// Check first that the file is an image.
$image_factory = \Drupal::service('image.factory');
$image = $image_factory->get($file->getFileUri());
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if ($image->isValid()) {
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if ($maximum_dimensions) {
// Check that it is smaller than the given dimensions.
list($width, $height) = explode('x', $maximum_dimensions);
if ($image->getWidth() > $width || $image->getHeight() > $height) {
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// Try to resize the image to fit the dimensions.
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if ($image->scale($width, $height)) {
$image->save();
$file->filesize = $image->getFileSize();
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drupal_set_message(t('The image was resized to fit within the maximum allowed dimensions of %dimensions pixels.', array('%dimensions' => $maximum_dimensions)));
}
else {
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$errors[] = t('The image exceeds the maximum allowed dimensions and an attempt to resize it failed.');
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}
}
}
if ($minimum_dimensions) {
// Check that it is larger than the given dimensions.
list($width, $height) = explode('x', $minimum_dimensions);
if ($image->getWidth() < $width || $image->getHeight() < $height) {
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$errors[] = t('The image is too small; the minimum dimensions are %dimensions pixels.', array('%dimensions' => $minimum_dimensions));
}
}
}
return $errors;
}
/**
* Saves a file to the specified destination and creates a database entry.
*
* @param $data
* A string containing the contents of the file.
* @param $destination
* A string containing the destination URI. This must be a stream wrapper URI.
* If no value is provided, a randomized name will be generated and the file
* will be saved using Drupal's default files scheme, usually "public://".
* @param $replace
* Replace behavior when the destination file already exists:
* - FILE_EXISTS_REPLACE - Replace the existing file. If a managed file with
* the destination name exists then its database entry will be updated. If
* no database entry is found then a new one will be created.
* - FILE_EXISTS_RENAME - Append _{incrementing number} until the filename is
* unique.
* - FILE_EXISTS_ERROR - Do nothing and return FALSE.
*
* @return \Drupal\file\FileInterface
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* A file entity, or FALSE on error.
*
* @see file_unmanaged_save_data()
*/
function file_save_data($data, $destination = NULL, $replace = FILE_EXISTS_RENAME) {
$user = \Drupal::currentUser();
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if (empty($destination)) {
$destination = file_default_scheme() . '://';
}
if (!file_valid_uri($destination)) {
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\Drupal::logger('file')->notice('The data could not be saved because the destination %destination is invalid. This may be caused by improper use of file_save_data() or a missing stream wrapper.', array('%destination' => $destination));
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drupal_set_message(t('The data could not be saved because the destination is invalid. More information is available in the system log.'), 'error');
return FALSE;
}
if ($uri = file_unmanaged_save_data($data, $destination, $replace)) {
// Create a file entity.
$file = entity_create('file', array(
'uri' => $uri,
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'uid' => $user->id(),
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'status' => FILE_STATUS_PERMANENT,
));
// If we are replacing an existing file re-use its database record.
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// @todo Do not create a new entity in order to update it, see
// https://drupal.org/node/2241865
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if ($replace == FILE_EXISTS_REPLACE) {
$existing_files = entity_load_multiple_by_properties('file', array('uri' => $uri));
if (count($existing_files)) {
$existing = reset($existing_files);
$file->fid = $existing->id();
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$file->setOriginalId($existing->id());
$file->setFilename($existing->getFilename());
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}
}
// If we are renaming around an existing file (rather than a directory),
// use its basename for the filename.
elseif ($replace == FILE_EXISTS_RENAME && is_file($destination)) {
$file->setFilename(drupal_basename($destination));
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}
$file->save();
return $file;
}
return FALSE;
}
/**
* Examines a file entity and returns appropriate content headers for download.
*
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* @param \Drupal\file\FileInterface $file
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* A file entity.
*
* @return
* An associative array of headers, as expected by
* \Symfony\Component\HttpFoundation\StreamedResponse.
*/
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function file_get_content_headers(FileInterface $file) {
$type = Unicode::mimeHeaderEncode($file->getMimeType());
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return array(
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'Content-Type' => $type,
'Content-Length' => $file->getSize(),
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'Cache-Control' => 'private',
);
}
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/**
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* Implements hook_theme().
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*/
function file_theme() {
return array(
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// From file.module.
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'file_link' => array(
'variables' => array('file' => NULL, 'description' => NULL, 'attributes' => array()),
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),
'file_managed_file' => array(
'render element' => 'element',
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),
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// From file.field.inc.
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'file_widget' => array(
'render element' => 'element',
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'file' => 'file.field.inc',
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),
'file_widget_multiple' => array(
'render element' => 'element',
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'file' => 'file.field.inc',
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),
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'file_upload_help' => array(
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'variables' => array('description' => NULL, 'upload_validators' => NULL, 'cardinality' => NULL),
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'file' => 'file.field.inc',
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),
);
}
/**
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* Implements hook_file_download().
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*/
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function file_file_download($uri) {
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// Get the file record based on the URI. If not in the database just return.
/** @var \Drupal\file\FileInterface[] $files */
$files = entity_load_multiple_by_properties('file', array('uri' => $uri));
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if (count($files)) {
foreach ($files as $item) {
// Since some database servers sometimes use a case-insensitive comparison
// by default, double check that the filename is an exact match.
if ($item->getFileUri() === $uri) {
$file = $item;
break;
}
}
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}
if (!isset($file)) {
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return;
}
// Find out which (if any) fields of this type contain the file.
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$references = file_get_file_references($file, NULL, EntityStorageInterface::FIELD_LOAD_CURRENT, NULL);
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// Stop processing if there are no references in order to avoid returning
// headers for files controlled by other modules. Make an exception for
// temporary files where the host entity has not yet been saved (for example,
// an image preview on a node/add form) in which case, allow download by the
// file's owner.
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if (empty($references) && ($file->isPermanent() || $file->getOwnerId() != \Drupal::currentUser()->id())) {
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if (!$file->access('download')) {
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return -1;
}
// Access is granted.
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$headers = file_get_content_headers($file);
return $headers;
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}
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/**
* Implements file_cron()
*/
function file_cron() {
$age = \Drupal::config('system.file')->get('temporary_maximum_age');
// Only delete temporary files if older than $age. Note that automatic cleanup
// is disabled if $age set to 0.
if ($age) {
$fids = Drupal::entityQuery('file')
->condition('status', FILE_STATUS_PERMANENT, '<>')
->condition('changed', REQUEST_TIME - $age, '<')
->range(0, 100)
->execute();
$files = file_load_multiple($fids);
foreach ($files as $file) {
$references = \Drupal::service('file.usage')->listUsage($file);
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if (empty($references)) {
if (file_exists($file->getFileUri())) {
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$file->delete();
}
else {
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\Drupal::logger('file system')->error('Could not delete temporary file "%path" during garbage collection', array('%path' => $file->getFileUri()));
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}
}
else {
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\Drupal::logger('file system')->info('Did not delete temporary file "%path" during garbage collection because it is in use by the following modules: %modules.', array('%path' => $file->getFileUri(), '%modules' => implode(', ', array_keys($references))));
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}
}
}
}
/**
* Saves file uploads to a new location.
*
* The files will be added to the {file_managed} table as temporary files.
* Temporary files are periodically cleaned. Use the 'file.usage' service to
* register the usage of the file which will automatically mark it as permanent.
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*
* @param $form_field_name
* A string that is the associative array key of the upload form element in
* the form array.
* @param $validators
* An optional, associative array of callback functions used to validate the
* file. See file_validate() for a full discussion of the array format.
* If no extension validator is provided it will default to a limited safe
* list of extensions which is as follows: "jpg jpeg gif png txt
* doc xls pdf ppt pps odt ods odp". To allow all extensions you must
* explicitly set the 'file_validate_extensions' validator to an empty array
* (Beware: this is not safe and should only be allowed for trusted users, if
* at all).
* @param $destination
* A string containing the URI that the file should be copied to. This must
* be a stream wrapper URI. If this value is omitted, Drupal's temporary
* files scheme will be used ("temporary://").
* @param $delta
* Delta of the file to save or NULL to save all files. Defaults to NULL.
* @param $replace
* Replace behavior when the destination file already exists:
* - FILE_EXISTS_REPLACE: Replace the existing file.
* - FILE_EXISTS_RENAME: Append _{incrementing number} until the filename is
* unique.
* - FILE_EXISTS_ERROR: Do nothing and return FALSE.
*
* @return
* Function returns array of files or a single file object if $delta
* != NULL. Each file object contains the file information if the
* upload succeeded or FALSE in the event of an error. Function
* returns NULL if no file was uploaded.
*
* The documentation for the "File interface" group, which you can find under
* Related topics, or the header at the top of this file, documents the
* components of a file entity. In addition to the standard components,
* this function adds:
* - source: Path to the file before it is moved.
* - destination: Path to the file after it is moved (same as 'uri').
*/
function file_save_upload($form_field_name, $validators = array(), $destination = FALSE, $delta = NULL, $replace = FILE_EXISTS_RENAME) {
$user = \Drupal::currentUser();
static $upload_cache;
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$file_upload = \Drupal::request()->files->get("files[$form_field_name]", NULL, TRUE);
// Make sure there's an upload to process.
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if (empty($file_upload)) {
return NULL;
}
// Return cached objects without processing since the file will have
// already been processed and the paths in $_FILES will be invalid.
if (isset($upload_cache[$form_field_name])) {
if (isset($delta)) {
return $upload_cache[$form_field_name][$delta];
}
return $upload_cache[$form_field_name];
}
// Prepare uploaded files info. Representation is slightly different
// for multiple uploads and we fix that here.
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$uploaded_files = $file_upload;
if (!is_array($file_upload)) {
$uploaded_files = array($file_upload);
}
$files = array();
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foreach ($uploaded_files as $i => $file_info) {
// Check for file upload errors and return FALSE for this file if a lower
// level system error occurred. For a complete list of errors:
// See http://php.net/manual/features.file-upload.errors.php.
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switch ($file_info->getError()) {
case UPLOAD_ERR_INI_SIZE:
case UPLOAD_ERR_FORM_SIZE:
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drupal_set_message(t('The file %file could not be saved because it exceeds %maxsize, the maximum allowed size for uploads.', array('%file' => $file_info->getFilename(), '%maxsize' => format_size(file_upload_max_size()))), 'error');
$files[$i] = FALSE;
continue;
case UPLOAD_ERR_PARTIAL:
case UPLOAD_ERR_NO_FILE:
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drupal_set_message(t('The file %file could not be saved because the upload did not complete.', array('%file' => $file_info->getFilename())), 'error');
$files[$i] = FALSE;
continue;
case UPLOAD_ERR_OK:
// Final check that this is a valid upload, if it isn't, use the
// default error handler.
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if (is_uploaded_file($file_info->getRealPath())) {
break;
}
// Unknown error
default:
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drupal_set_message(t('The file %file could not be saved. An unknown error has occurred.', array('%file' => $file_info->getFilename())), 'error');
$files[$i] = FALSE;
continue;
}
// Begin building file entity.
$values = array(
'uid' => $user->id(),
'status' => 0,
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'filename' => $file_info->getClientOriginalName(),
'uri' => $file_info->getRealPath(),
'filesize' => $file_info->getSize(),
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);
$values['filemime'] = file_get_mimetype($values['filename']);
$file = entity_create('file', $values);
$extensions = '';
if (isset($validators['file_validate_extensions'])) {
if (isset($validators['file_validate_extensions'][0])) {
// Build the list of non-munged extensions if the caller provided them.
$extensions = $validators['file_validate_extensions'][0];
}
else {
// If 'file_validate_extensions' is set and the list is empty then the
// caller wants to allow any extension. In this case we have to remove the
// validator or else it will reject all extensions.
unset($validators['file_validate_extensions']);
}
}
else {
// No validator was provided, so add one using the default list.
// Build a default non-munged safe list for file_munge_filename().
$extensions = 'jpg jpeg gif png txt doc xls pdf ppt pps odt ods odp';
$validators['file_validate_extensions'] = array();
$validators['file_validate_extensions'][0] = $extensions;
}
if (!empty($extensions)) {
// Munge the filename to protect against possible malicious extension
// hiding within an unknown file type (ie: filename.html.foo).
$file->setFilename(file_munge_filename($file->getFilename(), $extensions));
}
// Rename potentially executable files, to help prevent exploits (i.e. will
// rename filename.php.foo and filename.php to filename.php.foo.txt and
// filename.php.txt, respectively). Don't rename if 'allow_insecure_uploads'
// evaluates to TRUE.
if (!\Drupal::config('system.file')->get('allow_insecure_uploads') && preg_match('/\.(php|pl|py|cgi|asp|js)(\.|$)/i', $file->getFilename()) && (substr($file->getFilename(), -4) != '.txt')) {
$file->setMimeType('text/plain');
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// The destination filename will also later be used to create the URI.
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$file->setFilename($file->getFilename() . '.txt');
// The .txt extension may not be in the allowed list of extensions. We have
// to add it here or else the file upload will fail.
if (!empty($extensions)) {
$validators['file_validate_extensions'][0] .= ' txt';
drupal_set_message(t('For security reasons, your upload has been renamed to %filename.', array('%filename' => $file->getFilename())));
}
}
// If the destination is not provided, use the temporary directory.
if (empty($destination)) {
$destination = 'temporary://';
}
// Assert that the destination contains a valid stream.
$destination_scheme = file_uri_scheme($destination);
if (!file_stream_wrapper_valid_scheme($destination_scheme)) {
drupal_set_message(t('The file could not be uploaded because the destination %destination is invalid.', array('%destination' => $destination)), 'error');
$files[$i] = FALSE;
continue;
}
$file->source = $form_field_name;
// A file URI may already have a trailing slash or look like "public://".
if (substr($destination, -1) != '/') {
$destination .= '/';
}
$file->destination = file_destination($destination . $file->getFilename(), $replace);
// If file_destination() returns FALSE then $replace === FILE_EXISTS_ERROR and
// there's an existing file so we need to bail.
if ($file->destination === FALSE) {
drupal_set_message(t('The file %source could not be uploaded because a file by that name already exists in the destination %directory.', array('%source' => $form_field_name, '%directory' => $destination)), 'error');
$files[$i] = FALSE;
continue;
}
// Add in our check of the the file name length.
$validators['file_validate_name_length'] = array();
// Call the validation functions specified by this function's caller.
$errors = file_validate($file, $validators);
// Check for errors.
if (!empty($errors)) {
$message = t('The specified file %name could not be uploaded.', array('%name' => $file->getFilename()));
if (count($errors) > 1) {
$item_list = array(
'#theme' => 'item_list',
'#items' => $errors,
);
$message = SafeMarkup::set($message . drupal_render($item_list));
}
else {
$message = SafeMarkup::set($message . ' ' . SafeMarkup::escape(array_pop($errors)));
drupal_set_message($message, 'error');
$files[$i] = FALSE;
continue;
}
// Move uploaded files from PHP's upload_tmp_dir to Drupal's temporary
// directory. This overcomes open_basedir restrictions for future file
// operations.
$file->uri = $file->destination;
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if (!drupal_move_uploaded_file($file_info->getRealPath(), $file->getFileUri())) {
drupal_set_message(t('File upload error. Could not move uploaded file.'), 'error');
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\Drupal::logger('file')->notice('Upload error. Could not move uploaded file %file to destination %destination.', array('%file' => $file->filename, '%destination' => $file->uri));
$files[$i] = FALSE;
continue;
}
// Set the permissions on the new file.
drupal_chmod($file->getFileUri());
// If we are replacing an existing file re-use its database record.
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// @todo Do not create a new entity in order to update it, see
// https://drupal.org/node/2241865
if ($replace == FILE_EXISTS_REPLACE) {
$existing_files = entity_load_multiple_by_properties('file', array('uri' => $file->getFileUri()));
if (count($existing_files)) {
$existing = reset($existing_files);
$file->fid = $existing->id();
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$file->setOriginalId($existing->id());
}
}
// If we made it this far it's safe to record this file in the database.
$file->save();
$files[$i] = $file;
}
// Add files to the cache.
$upload_cache[$form_field_name] = $files;
return isset($delta) ? $files[$delta] : $files;
}
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/**
* Determines the preferred upload progress implementation.
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*
* @return
* A string indicating which upload progress system is available. Either "apc"
* or "uploadprogress". If neither are available, returns FALSE.
*/
function file_progress_implementation() {
static $implementation;
if (!isset($implementation)) {
$implementation = FALSE;
// We prefer the PECL extension uploadprogress because it supports multiple
// simultaneous uploads. APC only supports one at a time.
if (extension_loaded('uploadprogress')) {
$implementation = 'uploadprogress';
}
elseif (extension_loaded('apc') && ini_get('apc.rfc1867')) {
$implementation = 'apc';
}
}
return $implementation;
}
/**
* Implements hook_ENTITY_TYPE_predelete() for file entities.
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*/
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function file_file_predelete(File $file) {
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// TODO: Remove references to a file that is in-use.
}
/**
* Implements hook_tokens().
*/
function file_tokens($type, $tokens, array $data = array(), array $options = array()) {
$token_service = \Drupal::token();
$url_options = array('absolute' => TRUE);
if (isset($options['langcode'])) {
$url_options['language'] = \Drupal::languageManager()->getLanguage($options['langcode']);
$langcode = $options['langcode'];
}
else {
$langcode = NULL;
}
$sanitize = !empty($options['sanitize']);
$replacements = array();
if ($type == 'file' && !empty($data['file'])) {
/** @var \Drupal\file\FileInterface $file */
$file = $data['file'];
foreach ($tokens as $name => $original) {
switch ($name) {
// Basic keys and values.
case 'fid':
$replacements[$original] = $file->id();
break;
// Essential file data
case 'name':
$replacements[$original] = $sanitize ? String::checkPlain($file->getFilename()) : $file->getFilename();
break;
case 'path':
$replacements[$original] = $sanitize ? String::checkPlain($file->getFileUri()) : $file->getFileUri();
break;
case 'mime':
$replacements[$original] = $sanitize ? String::checkPlain($file->getMimeType()) : $file->getMimeType();
break;
case 'size':
$replacements[$original] = format_size($file->getSize());
break;
case 'url':
$replacements[$original] = $sanitize ? String::checkPlain(file_create_url($file->getFileUri())) : file_create_url($file->getFileUri());
break;
// These tokens are default variations on the chained tokens handled below.
case 'created':
$replacements[$original] = format_date($file->getCreatedTime(), 'medium', '', NULL, $langcode);
break;
case 'changed':
$replacements[$original] = format_date($file->getChangedTime(), 'medium', '', NULL, $langcode);
break;
case 'owner':
$name = $file->getOwner()->label();
$replacements[$original] = $sanitize ? String::checkPlain($name) : $name;
break;
}
}
if ($date_tokens = $token_service->findWithPrefix($tokens, 'created')) {
$replacements += $token_service->generate('date', $date_tokens, array('date' => $file->getCreatedTime()), $options);
}
if ($date_tokens = $token_service->findWithPrefix($tokens, 'changed')) {
$replacements += $token_service->generate('date', $date_tokens, array('date' => $file->getChangedTime()), $options);
}
if (($owner_tokens = $token_service->findWithPrefix($tokens, 'owner')) && $file->getOwner()) {
$replacements += $token_service->generate('user', $owner_tokens, array('user' => $file->getOwner()), $options);
}