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<?php |
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use Elgg\Filesystem\MimeTypeDetector; |
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use Symfony\Component\HttpFoundation\File\Exception\FileException; |
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use Symfony\Component\HttpFoundation\File\UploadedFile; |
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/** |
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* This class represents a physical file. |
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* |
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* Create a new \ElggFile object and specify a filename |
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* |
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* Open the file using the appropriate mode, and you will be able to |
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* read and write to the file. |
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* |
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* Optionally, you can also call the file's save() method, this will |
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* turn the file into an entity in the system and permit you to do |
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* things like attach tags to the file. If you do not save the file, no |
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* entity is created in the database. This is because there are occasions |
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* when you may want access to file data on datastores using the \ElggFile |
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* interface without a need to persist information such as temporary files. |
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* |
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* @package Elgg.Core |
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* @subpackage DataModel.File |
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* |
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* @property string $mimetype MIME type of the file |
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* @property string $simpletype Category of the file |
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* @property string $originalfilename Filename of the original upload |
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* @property int $upload_time Timestamp of the upload action, used as a filename prefix |
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* @property string $filestore_prefix Prefix (directory) on user's filestore where the file is saved |
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*/ |
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class ElggFile extends ElggObject { |
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/** |
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* @var resource|null File handle used to identify this file in a filestore. Created by open. |
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*/ |
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private $handle; |
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/** |
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* Set subtype to 'file'. |
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* |
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* @return void |
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*/ |
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protected function initializeAttributes() { |
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parent::initializeAttributes(); |
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$this->attributes['subtype'] = "file"; |
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} |
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/** |
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* Set the filename of this file. |
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* |
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* @param string $name The filename. |
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* |
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* @return void |
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*/ |
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public function setFilename($name) { |
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$this->filename = $name; |
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} |
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/** |
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* Return the filename. |
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* |
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* @return string |
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*/ |
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public function getFilename() { |
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return $this->filename; |
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} |
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/** |
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* Return the filename of this file as it is/will be stored on the |
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* filestore, which may be different to the filename. |
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* |
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* @return string |
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*/ |
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public function getFilenameOnFilestore() { |
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return $this->getFilestore()->getFilenameOnFilestore($this); |
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} |
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/** |
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* Return the size of the filestore associated with this file |
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* |
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* @param string $prefix Storage prefix |
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* @param int $container_guid The container GUID of the checked filestore |
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* |
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* @return int |
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*/ |
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public function getFilestoreSize($prefix = '', $container_guid = 0) { |
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if (!$container_guid) { |
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$container_guid = $this->container_guid; |
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} |
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// @todo add getSize() to \ElggFilestore |
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return $this->getFilestore()->getSize($prefix, $container_guid); |
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} |
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/** |
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* Get the mime type of the file. |
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* Returns mimetype metadata value if set, otherwise attempts to detect it. |
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* @return string |
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*/ |
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public function getMimeType() { |
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if ($this->mimetype) { |
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return $this->mimetype; |
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} |
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return $this->detectMimeType(); |
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} |
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/** |
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* Set the mime type of the file. |
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* |
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* @param string $mimetype The mimetype |
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* @return bool |
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*/ |
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public function setMimeType($mimetype) { |
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return $this->mimetype = $mimetype; |
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} |
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/** |
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* Detects mime types based on filename or actual file. |
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* |
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* @note This method can be called both dynamically and statically |
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* |
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* @param mixed $file The full path of the file to check. For uploaded files, use tmp_name. |
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* @param mixed $default A default. Useful to pass what the browser thinks it is. |
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* @since 1.7.12 |
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* |
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* @return mixed Detected type on success, false on failure. |
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* @todo Move this out into a utility class |
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*/ |
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public function detectMimeType($file = null, $default = null) { |
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$class = __CLASS__; |
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if (!$file && isset($this) && $this instanceof $class) { |
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$file = $this->getFilenameOnFilestore(); |
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} |
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if (!is_readable($file)) { |
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return false; |
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} |
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$mime = $default; |
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$detected = (new MimeTypeDetector())->tryStrategies($file); |
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if ($detected) { |
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$mime = $detected; |
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} |
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$original_filename = isset($this) && $this instanceof $class ? $this->originalfilename : basename($file); |
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$params = [ |
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'filename' => $file, |
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'original_filename' => $original_filename, // @see file upload action |
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'default' => $default, |
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]; |
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return _elgg_services()->hooks->trigger('mime_type', 'file', $params, $mime); |
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} |
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/** |
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* Get the simple type of the file. |
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* Returns simpletype metadata value if set, otherwise parses it from mimetype |
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* @see elgg_get_file_simple_type |
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* |
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* @return string 'document', 'audio', 'video', or 'general' if the MIME type was unrecognized |
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*/ |
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public function getSimpleType() { |
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if (isset($this->simpletype)) { |
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return $this->simpletype; |
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} |
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$mime_type = $this->getMimeType(); |
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return elgg_get_file_simple_type($mime_type); |
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} |
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/** |
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* Set the optional file description. |
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* |
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* @param string $description The description. |
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* |
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* @return bool |
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*/ |
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public function setDescription($description) { |
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$this->description = $description; |
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} |
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/** |
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* Open the file with the given mode |
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* |
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* @param string $mode Either read/write/append |
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* |
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* @return resource File handler |
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* |
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* @throws IOException |
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* @throws InvalidParameterException |
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*/ |
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public function open($mode) { |
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if (!$this->getFilename()) { |
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throw new IOException("You must specify a name before opening a file."); |
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} |
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// See if file has already been saved |
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// seek on datastore, parameters and name? |
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// Sanity check |
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if ( |
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($mode != "read") && |
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($mode != "write") && |
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($mode != "append") |
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) { |
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$msg = "Unrecognized file mode '" . $mode . "'"; |
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throw new InvalidParameterException($msg); |
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} |
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// Open the file handle |
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$this->handle = $this->getFilestore()->open($this, $mode); |
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return $this->handle; |
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} |
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/** |
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* Write data. |
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* |
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* @param string $data The data |
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* |
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* @return false|int |
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*/ |
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public function write($data) { |
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return $this->getFilestore()->write($this->handle, $data); |
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} |
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/** |
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* Read data. |
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* |
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* @param int $length Amount to read. |
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* @param int $offset The offset to start from. |
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* |
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* @return mixed Data or false |
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*/ |
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public function read($length, $offset = 0) { |
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return $this->getFilestore()->read($this->handle, $length, $offset); |
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} |
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/** |
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* Gets the full contents of this file. |
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* |
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* @return mixed The file contents. |
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*/ |
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public function grabFile() { |
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return $this->getFilestore()->grabFile($this); |
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} |
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/** |
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* Close the file and commit changes |
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* |
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* @return bool |
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*/ |
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public function close() { |
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if ($this->getFilestore()->close($this->handle)) { |
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$this->handle = null; |
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return true; |
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} |
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return false; |
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} |
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/** |
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* Delete this file. |
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* |
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* @param bool $follow_symlinks If true, will also delete the target file if the current file is a symlink |
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* @return bool |
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*/ |
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public function delete($follow_symlinks = true) { |
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$result = $this->getFilestore()->delete($this, $follow_symlinks); |
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if ($this->getGUID() && $result) { |
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$result = parent::delete(); |
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} |
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return $result; |
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} |
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/** |
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* Seek a position in the file. |
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* |
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* @param int $position Position in bytes |
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* |
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* @return void |
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*/ |
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public function seek($position) { |
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// @todo add seek() to \ElggFilestore |
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$this->getFilestore()->seek($this->handle, $position); |
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} |
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/** |
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* Return the current position of the file. |
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* |
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* @return int The file position |
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*/ |
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public function tell() { |
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return $this->getFilestore()->tell($this->handle); |
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} |
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/** |
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* Updates modification time of the file and clears stats cache for the file |
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* @return bool |
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*/ |
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public function setModifiedTime() { |
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$filestorename = $this->getFilenameOnFilestore(); |
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$modified = touch($filestorename); |
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if ($modified) { |
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clearstatcache(true, $filestorename); |
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} else { |
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elgg_log("Unable to update modified time for $filestorename", 'ERROR'); |
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} |
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return $modified; |
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} |
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/** |
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* Returns file modification time |
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* @return int |
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*/ |
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public function getModifiedTime() { |
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return filemtime($this->getFilenameOnFilestore()); |
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} |
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/** |
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* Return the size of the file in bytes. |
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* |
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* @return int |
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* @since 1.9 |
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*/ |
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public function getSize() { |
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return $this->getFilestore()->getFileSize($this); |
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} |
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/** |
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* Return a boolean value whether the file handle is at the end of the file |
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* |
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* @return bool |
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*/ |
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public function eof() { |
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return $this->getFilestore()->eof($this->handle); |
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} |
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/** |
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* Returns if the file exists |
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* |
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* @return bool |
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*/ |
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89 |
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public function exists() { |
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return $this->getFilestore()->exists($this); |
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} |
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/** |
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* Return the system filestore based on dataroot. |
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* |
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* @return \ElggDiskFilestore |
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*/ |
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|
92 |
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protected function getFilestore() { |
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return _elgg_services()->filestore; |
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} |
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/** |
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* Transfer a file to a new owner and sets a new filename, |
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* copies file contents to a new location. |
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* |
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* This is an alternative to using rename() which fails to move files to |
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* a non-existent directory under new owner's filestore directory |
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* |
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* @param int $owner_guid New owner's guid |
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* @param string $filename New filename (uses old filename if not set) |
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* @return bool |
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*/ |
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public function transfer($owner_guid, $filename = null) { |
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if (!$owner_guid) { |
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return false; |
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} |
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if (!$this->exists()) { |
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return false; |
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} |
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378
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if (!$filename) { |
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$filename = $this->getFilename(); |
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} |
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$filestorename = $this->getFilenameOnFilestore(); |
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$this->owner_guid = $owner_guid; |
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$this->setFilename($filename); |
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|
$this->open('write'); |
386
|
|
|
$this->close(); |
387
|
|
|
|
388
|
|
|
return rename($filestorename, $this->getFilenameOnFilestore()); |
389
|
|
|
} |
390
|
|
|
|
391
|
|
|
/** |
392
|
|
|
* Writes contents of the uploaded file to an instance of ElggFile |
393
|
|
|
* |
394
|
|
|
* @note Note that this function moves the file and populates properties, |
395
|
|
|
* but does not call ElggFile::save(). |
396
|
|
|
* |
397
|
|
|
* @note This method will automatically assign a filename on filestore based |
398
|
|
|
* on the upload time and filename. By default, the file will be written |
399
|
|
|
* to /file directory on owner's filestore. You can change this directory, |
400
|
|
|
* by setting 'filestore_prefix' property of the ElggFile instance before |
401
|
|
|
* calling this method. |
402
|
|
|
* |
403
|
|
|
* @param UploadedFile $upload Uploaded file object |
404
|
|
|
* @return bool |
405
|
|
|
*/ |
406
|
2 |
|
public function acceptUploadedFile(UploadedFile $upload) { |
407
|
2 |
|
if (!$upload->isValid()) { |
408
|
|
|
return false; |
409
|
|
|
} |
410
|
|
|
|
411
|
2 |
|
$old_filestorename = ''; |
412
|
2 |
|
if ($this->exists()) { |
413
|
|
|
$old_filestorename = $this->getFilenameOnFilestore(); |
414
|
|
|
} |
415
|
|
|
|
416
|
2 |
|
$originalfilename = $upload->getClientOriginalName(); |
417
|
2 |
|
$this->originalfilename = $originalfilename; |
418
|
2 |
|
if (empty($this->title)) { |
419
|
2 |
|
$this->title = htmlspecialchars($this->originalfilename, ENT_QUOTES, 'UTF-8'); |
420
|
|
|
} |
421
|
|
|
|
422
|
2 |
|
$this->upload_time = time(); |
423
|
2 |
|
$prefix = $this->filestore_prefix ?: 'file'; |
424
|
2 |
|
$prefix = trim($prefix, '/'); |
425
|
2 |
|
$filename = elgg_strtolower("$prefix/{$this->upload_time}{$this->originalfilename}"); |
426
|
2 |
|
$this->setFilename($filename); |
427
|
2 |
|
$this->filestore_prefix = $prefix; |
428
|
|
|
|
429
|
|
|
$hook_params = [ |
430
|
2 |
|
'file' => $this, |
431
|
2 |
|
'upload' => $upload, |
432
|
|
|
]; |
433
|
|
|
|
434
|
2 |
|
$uploaded = _elgg_services()->hooks->trigger('upload', 'file', $hook_params); |
|
|
|
|
435
|
2 |
|
if ($uploaded !== true && $uploaded !== false) { |
436
|
1 |
|
$filestorename = $this->getFilenameOnFilestore(); |
437
|
|
|
try { |
438
|
1 |
|
$uploaded = $upload->move(pathinfo($filestorename, PATHINFO_DIRNAME), pathinfo($filestorename, PATHINFO_BASENAME)); |
439
|
|
|
} catch (FileException $ex) { |
440
|
|
|
_elgg_services()->logger->error($ex->getMessage()); |
441
|
|
|
$uploaded = false; |
442
|
|
|
} |
443
|
|
|
} |
444
|
|
|
|
445
|
2 |
|
if ($uploaded) { |
446
|
2 |
|
if ($old_filestorename && $old_filestorename != $this->getFilenameOnFilestore()) { |
447
|
|
|
// remove old file |
448
|
|
|
unlink($old_filestorename); |
449
|
|
|
} |
450
|
2 |
|
$mime_type = $this->detectMimeType(null, $upload->getClientMimeType()); |
451
|
2 |
|
$this->setMimeType($mime_type); |
452
|
2 |
|
$this->simpletype = elgg_get_file_simple_type($mime_type); |
453
|
2 |
|
_elgg_services()->hooks->getEvents()->triggerAfter('upload', 'file', $this); |
454
|
2 |
|
return true; |
455
|
|
|
} |
456
|
|
|
|
457
|
1 |
|
return false; |
458
|
|
|
} |
459
|
|
|
|
460
|
|
|
/** |
461
|
|
|
* Get property names to serialize. |
462
|
|
|
* |
463
|
|
|
* @return string[] |
464
|
|
|
*/ |
465
|
4 |
|
public function __sleep() { |
466
|
4 |
|
return array_diff(array_keys(get_object_vars($this)), [ |
467
|
|
|
// a resource |
468
|
4 |
|
'handle', |
469
|
|
|
]); |
470
|
|
|
} |
471
|
|
|
|
472
|
|
|
/** |
473
|
|
|
* Checks the download permissions for the file |
474
|
|
|
* |
475
|
|
|
* @param int $user_guid GUID of the user (defaults to logged in user) |
476
|
|
|
* @param bool $default Default permission |
477
|
|
|
* |
478
|
|
|
* @return bool |
479
|
|
|
*/ |
480
|
2 |
|
public function canDownload($user_guid = 0, $default = true) { |
481
|
2 |
|
return _elgg_services()->userCapabilities->canDownload($this, $user_guid, $default); |
482
|
|
|
} |
483
|
|
|
|
484
|
|
|
/** |
485
|
|
|
* Returns file's download URL |
486
|
|
|
* |
487
|
|
|
* @note This does not work for files with custom filestores. |
488
|
|
|
* |
489
|
|
|
* @param bool $use_cookie Limit URL validity to current session only |
490
|
|
|
* @param string $expires URL expiration, as a string suitable for strtotime() |
491
|
|
|
* |
492
|
|
|
* @return string |
493
|
|
|
*/ |
494
|
|
|
public function getDownloadURL($use_cookie = true, $expires = '+2 hours') { |
495
|
|
|
|
496
|
|
|
$file_svc = new \Elgg\FileService\File(); |
497
|
|
|
$file_svc->setFile($this); |
498
|
|
|
$file_svc->setExpires($expires); |
|
|
|
|
499
|
|
|
$file_svc->setDisposition('attachment'); |
500
|
|
|
$file_svc->bindSession($use_cookie); |
501
|
|
|
$url = $file_svc->getURL(); |
502
|
|
|
|
503
|
|
|
$params = [ |
504
|
|
|
'entity' => $this, |
505
|
|
|
]; |
506
|
|
|
|
507
|
|
|
return _elgg_services()->hooks->trigger('download:url', 'file', $params, $url); |
|
|
|
|
508
|
|
|
} |
509
|
|
|
|
510
|
|
|
/** |
511
|
|
|
* Returns file's URL for inline display |
512
|
|
|
* Suitable for displaying cacheable resources, such as user avatars |
513
|
|
|
* |
514
|
|
|
* @note This does not work for files with custom filestores. |
515
|
|
|
* |
516
|
|
|
* @param bool $use_cookie Limit URL validity to current session only |
517
|
|
|
* @param string $expires URL expiration, as a string suitable for strtotime() |
518
|
|
|
* |
519
|
|
|
* @return string |
520
|
|
|
*/ |
521
|
1 |
|
public function getInlineURL($use_cookie = false, $expires = '') { |
522
|
1 |
|
$file_svc = new \Elgg\FileService\File(); |
523
|
1 |
|
$file_svc->setFile($this); |
524
|
1 |
|
if ($expires) { |
525
|
|
|
$file_svc->setExpires($expires); |
|
|
|
|
526
|
|
|
} |
527
|
1 |
|
$file_svc->setDisposition('inline'); |
528
|
1 |
|
$file_svc->bindSession($use_cookie); |
529
|
1 |
|
$url = $file_svc->getURL(); |
530
|
|
|
|
531
|
|
|
$params = [ |
532
|
1 |
|
'entity' => $this, |
533
|
|
|
]; |
534
|
|
|
|
535
|
1 |
|
return _elgg_services()->hooks->trigger('inline:url', 'file', $params, $url); |
|
|
|
|
536
|
|
|
} |
537
|
|
|
|
538
|
|
|
} |
539
|
|
|
|