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<?php |
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use Elgg\Exceptions\Filesystem\IOException; |
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use Elgg\Exceptions\DomainException as ElggDomainException; |
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use Elgg\Exceptions\InvalidArgumentException as ElggInvalidArgumentException; |
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use Elgg\Project\Paths; |
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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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* @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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* @property-read string $filename The filename of the file |
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*/ |
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class ElggFile extends ElggObject { |
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/** |
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* @var resource|null|false File handle used to identify this file in a filestore |
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* @see \ElggFile::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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* {@inheritDoc} |
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*/ |
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public function __set($name, $value) { |
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switch ($name) { |
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case 'filename': |
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// ensure sanitization |
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$this->setFilename($value); |
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return; |
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} |
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parent::__set($name, $value); |
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} |
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/** |
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* {@inheritDoc} |
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*/ |
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public function __get($name) { |
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switch ($name) { |
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case 'filename': |
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// ensure sanitization |
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return $this->getFilename(); |
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} |
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return parent::__get($name); |
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} |
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/** |
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* Set the filename of this file. This filename will be sanitized to prevent path traversal |
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* |
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* @param string $filename The filename |
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* |
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* @return void |
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*/ |
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public function setFilename(string $filename): void { |
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$filename = ltrim(Paths::sanitize($filename, false), '/'); |
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parent::__set('filename', $filename); |
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} |
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/** |
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* Return the filename. This filename will be sanitized to prevent path traversal |
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* |
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* @return string |
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*/ |
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public function getFilename(): string { |
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$filename = parent::__get('filename'); |
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if (empty($filename)) { |
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return ''; |
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} |
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return ltrim(Paths::sanitize($filename, false), '/'); |
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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(): string { |
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return $this->getFilestore()->getFilenameOnFilestore($this); |
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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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* |
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* @return string|false |
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*/ |
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public function getMimeType(): string|false { |
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if ($this->mimetype) { |
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return $this->mimetype; |
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} |
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try { |
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return _elgg_services()->mimetype->getMimeType($this->getFilenameOnFilestore()); |
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} catch (ElggInvalidArgumentException $e) { |
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// the file has no file on the filesystem |
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// can happen in tests etc. |
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} |
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return false; |
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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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* |
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* @return void |
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*/ |
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public function setMimeType(string $mimetype): void { |
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$this->mimetype = $mimetype; |
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} |
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/** |
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* Get the simple type of the file. |
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* Returns simpletype metadata value if set, otherwise parses it from mimetype |
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* |
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* @return string 'document', 'audio', 'video', or 'general' if the MIME type was unrecognized |
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*/ |
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public function getSimpleType(): string { |
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if (isset($this->simpletype)) { |
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return $this->simpletype; |
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} |
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return _elgg_services()->mimetype->getSimpleType($this->getMimeType() ?: ''); |
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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 false|resource File handler |
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* |
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* @throws IOException |
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* @throws \Elgg\Exceptions\DomainException |
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*/ |
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public function open(string $mode) { |
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if (!$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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if (!in_array($mode, ['read', 'write', 'append'])) { |
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throw new ElggDomainException("Unrecognized file mode '{$mode}'"); |
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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(string $data): int|false { |
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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(int $length, int $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 false|string The file contents. |
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*/ |
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public function grabFile(): string|false { |
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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(): bool { |
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if (is_resource($this->handle) && $this->getFilestore()->close($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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* {@inheritdoc} |
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*/ |
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public function delete(bool $recursive = true, bool $persistent = null): bool { |
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if (!$this->guid) { |
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return $this->persistentDelete($recursive); |
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} |
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return parent::delete($recursive, $persistent); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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protected function persistentDelete(bool $recursive = true): bool { |
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if ($this->guid) { |
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$result = parent::persistentDelete($recursive); |
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if ($result) { |
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$this->getFilestore()->delete($this); |
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} |
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return $result; |
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} |
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return $this->getFilestore()->delete($this); |
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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(int $position): void { |
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$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(): int { |
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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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* |
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* @return bool |
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*/ |
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public function setModifiedTime(): bool { |
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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 $modified; |
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} |
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/** |
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* Returns file modification time |
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* |
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* @return int |
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*/ |
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public function getModifiedTime(): int { |
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return filemtime($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(): int { |
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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(): bool { |
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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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public function exists(): bool { |
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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 \Elgg\Filesystem\Filestore\DiskFilestore |
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*/ |
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protected function getFilestore(): \Elgg\Filesystem\Filestore\DiskFilestore { |
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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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* |
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* @return bool |
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*/ |
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public function transfer(int $owner_guid, string $filename = null): bool { |
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1 |
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if ($owner_guid < 1) { |
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return false; |
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} |
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1 |
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if (!$this->exists()) { |
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return false; |
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} |
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365
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1 |
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if (empty($filename)) { |
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$filename = $this->getFilename(); |
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} |
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1 |
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$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'); |
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$this->close(); |
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return rename($filestorename, $this->getFilenameOnFilestore()); |
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} |
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/** |
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* Writes contents of the uploaded file to an instance of ElggFile |
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* |
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* @note Note that this function moves the file and populates properties, |
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* but does not call ElggFile::save(). |
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* |
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* @note This method will automatically assign a filename on filestore based |
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* on the upload time and filename. By default, the file will be written |
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* to /file directory on owner's filestore. You can change this directory, |
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|
|
* by setting 'filestore_prefix' property of the ElggFile instance before |
389
|
|
|
* calling this method. |
390
|
|
|
* |
391
|
|
|
* @param UploadedFile $upload Uploaded file object |
392
|
|
|
* |
393
|
|
|
* @return bool |
394
|
|
|
*/ |
395
|
2 |
|
public function acceptUploadedFile(UploadedFile $upload): bool { |
396
|
2 |
|
if (!$upload->isValid()) { |
397
|
|
|
return false; |
398
|
|
|
} |
399
|
|
|
|
400
|
2 |
|
$old_filestorename = ''; |
401
|
2 |
|
if ($this->exists()) { |
402
|
|
|
$old_filestorename = $this->getFilenameOnFilestore(); |
403
|
|
|
} |
404
|
|
|
|
405
|
2 |
|
$originalfilename = $upload->getClientOriginalName(); |
406
|
2 |
|
$this->originalfilename = $originalfilename; |
407
|
2 |
|
if (empty($this->title)) { |
408
|
2 |
|
$this->title = htmlspecialchars($this->originalfilename, ENT_QUOTES, 'UTF-8'); |
409
|
|
|
} |
410
|
|
|
|
411
|
2 |
|
$this->upload_time = time(); |
412
|
2 |
|
$prefix = $this->filestore_prefix ?: 'file'; |
413
|
2 |
|
$prefix = trim($prefix, '/'); |
414
|
2 |
|
$filename = elgg_strtolower("{$prefix}/{$this->upload_time}{$this->originalfilename}"); |
415
|
2 |
|
$this->setFilename($filename); |
416
|
2 |
|
$this->filestore_prefix = $prefix; |
417
|
|
|
|
418
|
2 |
|
$params = [ |
419
|
2 |
|
'file' => $this, |
420
|
2 |
|
'upload' => $upload, |
421
|
2 |
|
]; |
422
|
|
|
|
423
|
2 |
|
$uploaded = _elgg_services()->events->triggerResults('upload', 'file', $params); |
424
|
2 |
|
if ($uploaded !== true && $uploaded !== false) { |
425
|
1 |
|
$filestorename = $this->getFilenameOnFilestore(); |
426
|
|
|
try { |
427
|
1 |
|
$uploaded = $upload->move(pathinfo($filestorename, PATHINFO_DIRNAME), pathinfo($filestorename, PATHINFO_BASENAME)); |
428
|
|
|
} catch (FileException $ex) { |
429
|
|
|
_elgg_services()->logger->error($ex->getMessage()); |
430
|
|
|
$uploaded = false; |
431
|
|
|
} |
432
|
|
|
} |
433
|
|
|
|
434
|
2 |
|
if ($uploaded) { |
435
|
2 |
|
if ($old_filestorename && $old_filestorename != $this->getFilenameOnFilestore()) { |
436
|
|
|
// remove old file |
437
|
|
|
unlink($old_filestorename); |
438
|
|
|
} |
439
|
|
|
|
440
|
|
|
try { |
441
|
|
|
// try to detect mimetype |
442
|
2 |
|
$mime_type = _elgg_services()->mimetype->getMimeType($this->getFilenameOnFilestore()); |
443
|
1 |
|
$this->setMimeType($mime_type); |
444
|
1 |
|
$this->simpletype = _elgg_services()->mimetype->getSimpleType($mime_type); |
445
|
1 |
|
} catch (ElggInvalidArgumentException $e) { |
446
|
|
|
// this can fail if the upload events returns true, but the file is not present on the filestore |
447
|
|
|
// this happens in a unittest |
448
|
|
|
} |
449
|
|
|
|
450
|
2 |
|
_elgg_services()->events->triggerAfter('upload', 'file', $this); |
451
|
2 |
|
return true; |
452
|
|
|
} |
453
|
|
|
|
454
|
1 |
|
return false; |
455
|
|
|
} |
456
|
|
|
|
457
|
|
|
/** |
458
|
|
|
* Get property names to serialize. |
459
|
|
|
* |
460
|
|
|
* @return string[] |
461
|
|
|
*/ |
462
|
|
|
public function __sleep() { |
463
|
|
|
return array_diff(array_keys(get_object_vars($this)), [ |
464
|
|
|
// a resource |
465
|
|
|
'handle', |
466
|
|
|
]); |
467
|
|
|
} |
468
|
|
|
|
469
|
|
|
/** |
470
|
|
|
* Checks the download permissions for the file |
471
|
|
|
* |
472
|
|
|
* @param int $user_guid GUID of the user (defaults to logged in user) |
473
|
|
|
* @param bool $default Default permission |
474
|
|
|
* |
475
|
|
|
* @return bool |
476
|
|
|
*/ |
477
|
3 |
|
public function canDownload(int $user_guid = 0, bool $default = true): bool { |
478
|
3 |
|
return _elgg_services()->userCapabilities->canDownload($this, $user_guid, $default); |
479
|
|
|
} |
480
|
|
|
|
481
|
|
|
/** |
482
|
|
|
* Returns file's download URL |
483
|
|
|
* |
484
|
|
|
* @note This does not work for files with custom filestores. |
485
|
|
|
* |
486
|
|
|
* @param bool $use_cookie Limit URL validity to current session only |
487
|
|
|
* @param string $expires URL expiration, as a string suitable for strtotime() |
488
|
|
|
* |
489
|
|
|
* @return string|null |
490
|
|
|
*/ |
491
|
3 |
|
public function getDownloadURL(bool $use_cookie = true, string $expires = '+2 hours'): ?string { |
492
|
3 |
|
$file_svc = new \Elgg\FileService\File(); |
493
|
3 |
|
$file_svc->setFile($this); |
494
|
3 |
|
if (!empty($expires)) { |
495
|
3 |
|
$file_svc->setExpires($expires); |
496
|
|
|
} |
497
|
|
|
|
498
|
3 |
|
$file_svc->setDisposition('attachment'); |
499
|
3 |
|
$file_svc->bindSession($use_cookie); |
500
|
|
|
|
501
|
3 |
|
$params = [ |
502
|
3 |
|
'entity' => $this, |
503
|
3 |
|
'use_cookie' => $use_cookie, |
504
|
3 |
|
'expires' => $expires, |
505
|
3 |
|
]; |
506
|
3 |
|
return _elgg_services()->events->triggerResults('download:url', 'file', $params, $file_svc->getURL()); |
507
|
|
|
} |
508
|
|
|
|
509
|
|
|
/** |
510
|
|
|
* Returns file's URL for inline display |
511
|
|
|
* Suitable for displaying cacheable resources, such as user avatars |
512
|
|
|
* |
513
|
|
|
* @note This does not work for files with custom filestores. |
514
|
|
|
* |
515
|
|
|
* @param bool $use_cookie Limit URL validity to current session only |
516
|
|
|
* @param string $expires URL expiration, as a string suitable for strtotime() |
517
|
|
|
* |
518
|
|
|
* @return string|null |
519
|
|
|
*/ |
520
|
2 |
|
public function getInlineURL(bool $use_cookie = false, string $expires = ''): ?string { |
521
|
2 |
|
$file_svc = new \Elgg\FileService\File(); |
522
|
2 |
|
$file_svc->setFile($this); |
523
|
2 |
|
if (!empty($expires)) { |
524
|
1 |
|
$file_svc->setExpires($expires); |
525
|
|
|
} |
526
|
|
|
|
527
|
2 |
|
$file_svc->setDisposition('inline'); |
528
|
2 |
|
$file_svc->bindSession($use_cookie); |
529
|
|
|
|
530
|
2 |
|
$params = [ |
531
|
2 |
|
'entity' => $this, |
532
|
2 |
|
'use_cookie' => $use_cookie, |
533
|
2 |
|
'expires' => $expires, |
534
|
2 |
|
]; |
535
|
2 |
|
return _elgg_services()->events->triggerResults('inline:url', 'file', $params, $file_svc->getURL()); |
536
|
|
|
} |
537
|
|
|
} |
538
|
|
|
|