diff options
Diffstat (limited to 'modules/id3/getid3/module.archive.gzip.php')
| -rw-r--r-- | modules/id3/getid3/module.archive.gzip.php | 209 |
1 files changed, 209 insertions, 0 deletions
diff --git a/modules/id3/getid3/module.archive.gzip.php b/modules/id3/getid3/module.archive.gzip.php new file mode 100644 index 00000000..db18c329 --- /dev/null +++ b/modules/id3/getid3/module.archive.gzip.php @@ -0,0 +1,209 @@ +<?php +///////////////////////////////////////////////////////////////// +/// getID3() by James Heinrich <info@getid3.org> // +// available at http://getid3.sourceforge.net // +// or http://www.getid3.org // +///////////////////////////////////////////////////////////////// +// See readme.txt for more details // +///////////////////////////////////////////////////////////////// +// // +// module.archive.gzip.php // +// written by Mike Mozolin <mmozolinĜavk*ru> // +// module for analyzing GZIP files // +// dependencies: NONE // +// /// +///////////////////////////////////////////////////////////////// + +class getid3_gzip { + + function getid3_gzip(&$fd, &$ThisFileInfo) { + $ThisFileInfo['fileformat'] = 'gzip'; + $this->read_gzip($fd, $ThisFileInfo); + return false; + } + + // Reads the gzip-file + function read_gzip($fd, &$ThisFileInfo) { + + $start_length = 10; + $unpack_header = 'a1id1/a1id2/a1cmethod/a1flags/a4mtime/a1xflags/a1os'; + //+---+---+---+---+---+---+---+---+---+---+ + //|ID1|ID2|CM |FLG| MTIME |XFL|OS | + //+---+---+---+---+---+---+---+---+---+---+ + @fseek($fd, 0); + $buffer = @fread($fd, $ThisFileInfo['filesize']); + + $arr_members = explode("\x1F\x8B\x08", $buffer); + $num_members = intval(count($arr_members)); + for ($i = 0; $i < $num_members; $i++) { + if (strlen($arr_members[$i]) == 0) { + continue; + } + $thisThisFileInfo = &$ThisFileInfo['gzip']['member_header'][$i]; + + $buf = "\x1F\x8B\x08".$arr_members[$i]; + + $attr = unpack($unpack_header, substr($buf, 0, $start_length)); + if (!$this->get_os_type(ord($attr['os']))) { + // Split member with previous if wrong OS type + $arr_members[$i - 1] .= $buf; + $arr_members[$i] = ''; + continue; + } + } + + $ThisFileInfo['gzip']['files'] = array(); + + $fpointer = 0; + for ($i = 0; $i < $num_members; $i++) { + + if (strlen($arr_members[$i]) == 0) { + continue; + } + $thisThisFileInfo = &$ThisFileInfo['gzip']['member_header'][$i]; + + $buff = "\x1F\x8B\x08".$arr_members[$i]; + + $attr = unpack($unpack_header, substr($buff, 0, $start_length)); + //$id1 = ord($attr['id1']); + //$id2 = ord($attr['id2']); + $cmethod = ord($attr['cmethod']); + $thisThisFileInfo['raw']['flags'] = ord($attr['flags']); + $thisThisFileInfo['flags']['crc16'] = (bool) ($thisThisFileInfo['raw']['flags'] & 0x02); + $thisThisFileInfo['flags']['extra'] = (bool) ($thisThisFileInfo['raw']['flags'] & 0x04); + $thisThisFileInfo['flags']['filename'] = (bool) ($thisThisFileInfo['raw']['flags'] & 0x08); + $thisThisFileInfo['flags']['comment'] = (bool) ($thisThisFileInfo['raw']['flags'] & 0x10); + + $thisThisFileInfo['raw']['xflag'] = ord($attr['xflags']); + $thisThisFileInfo['compression'] = $this->get_xflag_type($thisThisFileInfo['raw']['xflag']); + + $thisThisFileInfo['filemtime'] = getid3_lib::LittleEndian2Int($attr['mtime']); + + $thisThisFileInfo['raw']['os'] = ord($attr['os']); + $thisThisFileInfo['os'] = $this->get_os_type($thisThisFileInfo['raw']['os']); + if (!$thisThisFileInfo['os']) { + $ThisFileInfo['error'][] = 'Read error on gzip file'; + return false; + } + + $fpointer = 10; + $arr_xsubfield = array(); + // bit 2 - FLG.FEXTRA + //+---+---+=================================+ + //| XLEN |...XLEN bytes of "extra field"...| + //+---+---+=================================+ + if ($thisThisFileInfo['flags']['extra']) { + $w_xlen = substr($buff, $fpointer, 2); + $xlen = getid3_lib::LittleEndian2Int($w_xlen); + $fpointer += 2; + $thisThisFileInfo['raw']['xfield'] = substr($buff, $fpointer, $xlen); + // Extra SubFields + //+---+---+---+---+==================================+ + //|SI1|SI2| LEN |... LEN bytes of subfield data ...| + //+---+---+---+---+==================================+ + $idx = 0; + while (true) { + if ($idx >= $xlen) { + break; + } + $si1 = ord(substr($buff, $fpointer+$idx, 1)); + $idx++; + $si2 = ord(substr($buff, $fpointer+$idx, 1)); + $idx++; + if (($si1 == 0x41) && ($si2 == 0x70)) { + $w_xsublen = substr($buff, $fpointer+$idx, 2); + $xsublen = getid3_lib::LittleEndian2Int($w_xsublen); + $idx += 2; + $arr_xsubfield[] = substr($buff, $fpointer+$idx, $xsublen); + $idx += $xsublen; + } else { + break; + } + } + $fpointer += $xlen; + } + // bit 3 - FLG.FNAME + //+=========================================+ + //|...original file name, zero-terminated...| + //+=========================================+ + $thisThisFileInfo['filename'] = ''; + if ($thisThisFileInfo['flags']['filename']) { + while(true) { + if (ord($buff[$fpointer]) == 0) { + $fpointer++; + break; + } + $thisThisFileInfo['filename'] .= $buff[$fpointer]; + $fpointer++; + } + } + // bit 4 - FLG.FCOMMENT + //+===================================+ + //|...file comment, zero-terminated...| + //+===================================+ + if ($thisThisFileInfo['flags']['comment']) { + while(true) { + if (ord($buff[$fpointer]) == 0) { + $fpointer++; + break; + } + $thisThisFileInfo['comment'] .= $buff[$fpointer]; + $fpointer++; + } + } + // bit 1 - FLG.FHCRC + //+---+---+ + //| CRC16 | + //+---+---+ + if ($thisThisFileInfo['flags']['crc16']) { + $w_crc = substr($buff, $fpointer, 2); + $thisThisFileInfo['crc16'] = getid3_lib::LittleEndian2Int($w_crc); + $fpointer += 2; + } + // bit 0 - FLG.FTEXT + //if ($thisThisFileInfo['raw']['flags'] & 0x01) { + // echo 'FTEXT<br>'; + //} + // bits 5, 6, 7 - reserved + + $thisThisFileInfo['crc32'] = getid3_lib::LittleEndian2Int(substr($buff, strlen($buff) - 8, 4)); + $thisThisFileInfo['filesize'] = getid3_lib::LittleEndian2Int(substr($buff, strlen($buff) - 4)); + + $ThisFileInfo['gzip']['files'] = getid3_lib::array_merge_clobber($ThisFileInfo['gzip']['files'], getid3_lib::CreateDeepArray($thisThisFileInfo['filename'], '/', $thisThisFileInfo['filesize'])); + } + } + + // Converts the OS type + function get_os_type($key) { + static $os_type = array( + '0' => 'FAT filesystem (MS-DOS, OS/2, NT/Win32)', + '1' => 'Amiga', + '2' => 'VMS (or OpenVMS)', + '3' => 'Unix', + '4' => 'VM/CMS', + '5' => 'Atari TOS', + '6' => 'HPFS filesystem (OS/2, NT)', + '7' => 'Macintosh', + '8' => 'Z-System', + '9' => 'CP/M', + '10' => 'TOPS-20', + '11' => 'NTFS filesystem (NT)', + '12' => 'QDOS', + '13' => 'Acorn RISCOS', + '255' => 'unknown' + ); + return @$os_type[$key]; + } + + // Converts the eXtra FLags + function get_xflag_type($key) { + static $xflag_type = array( + '0' => 'unknown', + '2' => 'maximum compression', + '4' => 'fastest algorithm' + ); + return @$xflag_type[$key]; + } +} + +?> |