* * @contributor Michael Slusarz * @contributor Michael Cochrane * * @package Joomla.Platform * @subpackage Archive * @since 11.1 */ class JArchiveTar implements JArchiveExtractable { /** * Tar file types. * * @var array * @since 11.1 */ private $_types = array( 0x0 => 'Unix file', 0x30 => 'File', 0x31 => 'Link', 0x32 => 'Symbolic link', 0x33 => 'Character special file', 0x34 => 'Block special file', 0x35 => 'Directory', 0x36 => 'FIFO special file', 0x37 => 'Contiguous file'); /** * Tar file data buffer * * @var string * @since 11.1 */ private $_data = null; /** * Tar file metadata array * * @var array * @since 11.1 */ private $_metadata = null; /** * Extract a ZIP compressed file to a given path * * @param string $archive Path to ZIP archive to extract * @param string $destination Path to extract archive into * @param array $options Extraction options [unused] * * @return boolean True if successful * * @throws RuntimeException * @since 11.1 */ public function extract($archive, $destination, array $options = array()) { $this->_data = null; $this->_metadata = null; $this->_data = file_get_contents($archive); if (!$this->_data) { if (class_exists('JError')) { return JError::raiseWarning(100, 'Unable to read archive'); } else { throw new RuntimeException('Unable to read archive'); } } $this->_getTarInfo($this->_data); for ($i = 0, $n = count($this->_metadata); $i < $n; $i++) { $type = strtolower($this->_metadata[$i]['type']); if ($type == 'file' || $type == 'unix file') { $buffer = $this->_metadata[$i]['data']; $path = JPath::clean($destination . '/' . $this->_metadata[$i]['name']); // Make sure the destination folder exists if (!JFolder::create(dirname($path))) { if (class_exists('JError')) { return JError::raiseWarning(100, 'Unable to create destination'); } else { throw new RuntimeException('Unable to create destination'); } } if (JFile::write($path, $buffer) === false) { if (class_exists('JError')) { return JError::raiseWarning(100, 'Unable to write entry'); } else { throw new RuntimeException('Unable to write entry'); } } } } return true; } /** * Tests whether this adapter can unpack files on this computer. * * @return boolean True if supported * * @since 11.3 */ public static function isSupported() { return true; } /** * Get the list of files/data from a Tar archive buffer. * * @param string &$data The Tar archive buffer. * * @return array Archive metadata array * 
	 * KEY: Position in the array
	 * VALUES: 'attr'  --  File attributes
	 * 'data'  --  Raw file contents
	 * 'date'  --  File modification time
	 * 'name'  --  Filename
	 * 'size'  --  Original file size
	 * 'type'  --  File type
	 *
* * @since 11.1 */ protected function _getTarInfo(& $data) { $position = 0; $return_array = array(); while ($position < strlen($data)) { $info = @unpack( "a100filename/a8mode/a8uid/a8gid/a12size/a12mtime/a8checksum/Ctypeflag/a100link/a6magic/a2version/a32uname/a32gname/a8devmajor/a8devminor", substr($data, $position) ); if (!$info) { if (class_exists('JError')) { return JError::raiseWarning(100, 'Unable to decompress data'); } else { throw new RuntimeException('Unable to decompress data'); } } $position += 512; $contents = substr($data, $position, octdec($info['size'])); $position += ceil(octdec($info['size']) / 512) * 512; if ($info['filename']) { $file = array( 'attr' => null, 'data' => null, 'date' => octdec($info['mtime']), 'name' => trim($info['filename']), 'size' => octdec($info['size']), 'type' => isset($this->_types[$info['typeflag']]) ? $this->_types[$info['typeflag']] : null); if (($info['typeflag'] == 0) || ($info['typeflag'] == 0x30) || ($info['typeflag'] == 0x35)) { /* File or folder. */ $file['data'] = $contents; $mode = hexdec(substr($info['mode'], 4, 3)); $file['attr'] = (($info['typeflag'] == 0x35) ? 'd' : '-') . (($mode & 0x400) ? 'r' : '-') . (($mode & 0x200) ? 'w' : '-') . (($mode & 0x100) ? 'x' : '-') . (($mode & 0x040) ? 'r' : '-') . (($mode & 0x020) ? 'w' : '-') . (($mode & 0x010) ? 'x' : '-') . (($mode & 0x004) ? 'r' : '-') . (($mode & 0x002) ? 'w' : '-') . (($mode & 0x001) ? 'x' : '-'); } else { /* Some other type. */ } $return_array[] = $file; } } $this->_metadata = $return_array; return true; } }