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<?php
/**
* @author bouchon
* @link http://dev.maxg.info
* @link http://forum.maxg.info
*
* Modified for Dokuwiki
* @author Christopher Smith <chris@jalakai.co.uk>
*/
class ZipLib {
var $datasec;
var $ctrl_dir = array();
var $eof_ctrl_dir = "\x50\x4b\x05\x06\x00\x00\x00\x00";
var $old_offset = 0;
var $dirs = Array(".");
function get_List($zip_name) {
$zip = @fopen($zip_name, 'rb');
if(!$zip) return(0);
$centd = $this->ReadCentralDir($zip,$zip_name);
@rewind($zip);
@fseek($zip, $centd['offset']);
for ($i=0; $i<$centd['entries']; $i++) {
$header = $this->ReadCentralFileHeaders($zip);
$header['index'] = $i;
$info['filename'] = $header['filename'];
$info['stored_filename'] = $header['stored_filename'];
$info['size'] = $header['size'];
$info['compressed_size'] = $header['compressed_size'];
$info['crc'] = strtoupper(dechex( $header['crc'] ));
$info['mtime'] = $header['mtime'];
$info['comment'] = $header['comment'];
$info['folder'] = ($header['external']==0x41FF0010||$header['external']==16)?1:0;
$info['index'] = $header['index'];
$info['status'] = $header['status'];
$ret[]=$info;
unset($header);
}
return $ret;
}
function Add($files,$compact) {
if(!is_array($files[0])) $files=Array($files);
for($i=0;$files[$i];$i++){
$fn = $files[$i];
if(!in_Array(dirname($fn[0]),$this->dirs))
$this->add_Dir(dirname($fn[0]));
if(basename($fn[0]))
$ret[basename($fn[0])]=$this->add_File($fn[1],$fn[0],$compact);
}
return $ret;
}
/**
* Zips recursively the $folder directory, from the $basedir directory
*/
function Compress($folder, $basedir=null, $parent=null) {
$full_path = $basedir."/".$parent.$folder;
$zip_path = $parent.$folder;
if ($zip_path) {
$zip_path .= "/";
$this->add_dir($zip_path);
}
$dir = new DirectoryIterator($full_path);
foreach($dir as $file) {
if(!$file->isDot()) {
$filename = $file->getFilename();
if($file->isDir()) {
$this->Compress($filename, $basedir, $zip_path);
} else {
$content = join('', file($full_path.'/'.$filename));
$this->add_File($content, $zip_path.$filename);
}
}
}
}
/**
* Returns the Zip file
*/
function get_file() {
$data = implode('', $this -> datasec);
$ctrldir = implode('', $this -> ctrl_dir);
return $data . $ctrldir . $this -> eof_ctrl_dir .
pack('v', count($this->ctrl_dir)).pack('v', count($this->ctrl_dir)).
pack('V', strlen($ctrldir)) . pack('V', strlen($data)) . "\x00\x00";
}
function add_dir($name) {
$name = str_replace("\\", "/", $name);
$fr = "\x50\x4b\x03\x04\x0a\x00\x00\x00\x00\x00\x00\x00\x00\x00";
$fr .= pack("V",0).pack("V",0).pack("V",0).pack("v", strlen($name) );
$fr .= pack("v", 0 ).$name.pack("V", 0).pack("V", 0).pack("V", 0);
$this -> datasec[] = $fr;
$new_offset = strlen(implode("", $this->datasec));
$cdrec = "\x50\x4b\x01\x02\x00\x00\x0a\x00\x00\x00\x00\x00\x00\x00\x00\x00";
$cdrec .= pack("V",0).pack("V",0).pack("V",0).pack("v", strlen($name) );
$cdrec .= pack("v", 0 ).pack("v", 0 ).pack("v", 0 ).pack("v", 0 );
$ext = "\xff\xff\xff\xff";
$cdrec .= pack("V", 16 ).pack("V", $this -> old_offset ).$name;
$this -> ctrl_dir[] = $cdrec;
$this -> old_offset = $new_offset;
$this -> dirs[] = $name;
}
/**
* Add a file named $name from a string $data
*/
function add_File($data, $name, $compact = 1) {
$name = str_replace('\\', '/', $name);
$dtime = dechex($this->DosTime());
$hexdtime = pack('H*',$dtime[6].$dtime[7].
$dtime[4].$dtime[5].
$dtime[2].$dtime[3].
$dtime[0].$dtime[1]);
if($compact){
$fr = "\x50\x4b\x03\x04\x14\x00\x00\x00\x08\x00".$hexdtime;
}else{
$fr = "\x50\x4b\x03\x04\x0a\x00\x00\x00\x00\x00".$hexdtime;
}
$unc_len = strlen($data);
$crc = crc32($data);
if($compact){
$zdata = gzcompress($data);
$c_len = strlen($zdata);
$zdata = substr(substr($zdata, 0, strlen($zdata) - 4), 2);
}else{
$zdata = $data;
}
$c_len=strlen($zdata);
$fr .= pack('V', $crc).pack('V', $c_len).pack('V', $unc_len);
$fr .= pack('v', strlen($name)).pack('v', 0).$name.$zdata;
$fr .= pack('V', $crc).pack('V', $c_len).pack('V', $unc_len);
$this -> datasec[] = $fr;
$new_offset = strlen(implode('', $this->datasec));
if($compact) {
$cdrec = "\x50\x4b\x01\x02\x00\x00\x14\x00\x00\x00\x08\x00";
} else {
$cdrec = "\x50\x4b\x01\x02\x14\x00\x0a\x00\x00\x00\x00\x00";
}
$cdrec .= $hexdtime.pack('V', $crc).pack('V', $c_len).pack('V', $unc_len);
$cdrec .= pack('v', strlen($name) ).pack('v', 0 ).pack('v', 0 );
$cdrec .= pack('v', 0 ).pack('v', 0 ).pack('V', 32 );
$cdrec .= pack('V', $this -> old_offset );
$this -> old_offset = $new_offset;
$cdrec .= $name;
$this -> ctrl_dir[] = $cdrec;
return true;
}
function DosTime() {
$timearray = getdate();
if ($timearray['year'] < 1980) {
$timearray['year'] = 1980;
$timearray['mon'] = 1;
$timearray['mday'] = 1;
$timearray['hours'] = 0;
$timearray['minutes'] = 0;
$timearray['seconds'] = 0;
}
return (($timearray['year'] - 1980) << 25) |
($timearray['mon'] << 21) |
($timearray['mday'] << 16) |
($timearray['hours'] << 11) |
($timearray['minutes'] << 5) |
($timearray['seconds'] >> 1);
}
/**
* Extract a zip file $zn to the $to directory
*/
function Extract ( $zn, $to, $index = Array(-1) ) {
if(!@is_dir($to)) $this->_mkdir($to);
$ok = 0;
$zip = @fopen($zn,'rb');
if(!$zip) return(-1);
$cdir = $this->ReadCentralDir($zip,$zn);
$pos_entry = $cdir['offset'];
if(!is_array($index)){
$index = array($index);
}
for($i=0; isset($index[$i]);$i++){
if(intval($index[$i])!=$index[$i]||$index[$i]>$cdir['entries'])
return(-1);
}
for ($i=0; $i<$cdir['entries']; $i++) {
@fseek($zip, $pos_entry);
$header = $this->ReadCentralFileHeaders($zip);
$header['index'] = $i;
$pos_entry = ftell($zip);
@rewind($zip);
fseek($zip, $header['offset']);
if(in_array("-1",$index)||in_array($i,$index)){
$stat[$header['filename']]=$this->ExtractFile($header, $to, $zip);
}
}
fclose($zip);
return $stat;
}
function ReadFileHeader($zip, $header) {
$binary_data = fread($zip, 30);
$data = unpack('vchk/vid/vversion/vflag/vcompression/vmtime/vmdate/Vcrc/Vcompressed_size/Vsize/vfilename_len/vextra_len', $binary_data);
$header['filename'] = fread($zip, $data['filename_len']);
if ($data['extra_len'] != 0) {
$header['extra'] = fread($zip, $data['extra_len']);
} else {
$header['extra'] = '';
}
$header['compression'] = $data['compression'];
foreach (array('size','compressed_size','crc') as $hd) { // On ODT files, these headers are 0. Keep the previous value.
if ($data[$hd] != 0) $header[$hd] = $data[$hd];
}
$header['flag'] = $data['flag'];
$header['mdate'] = $data['mdate'];
$header['mtime'] = $data['mtime'];
if ($header['mdate'] && $header['mtime']){
$hour = ($header['mtime']&0xF800)>>11;
$minute = ($header['mtime']&0x07E0)>>5;
$seconde = ($header['mtime']&0x001F)*2;
$year = (($header['mdate']&0xFE00)>>9)+1980;
$month = ($header['mdate']&0x01E0)>>5;
$day = $header['mdate']&0x001F;
$header['mtime'] = mktime($hour, $minute, $seconde, $month, $day, $year);
} else {
$header['mtime'] = time();
}
$header['stored_filename'] = $header['filename'];
$header['status'] = "ok";
return $header;
}
function ReadCentralFileHeaders($zip){
$binary_data = fread($zip, 46);
$header = unpack('vchkid/vid/vversion/vversion_extracted/vflag/vcompression/vmtime/vmdate/Vcrc/Vcompressed_size/Vsize/vfilename_len/vextra_len/vcomment_len/vdisk/vinternal/Vexternal/Voffset', $binary_data);
if ($header['filename_len'] != 0){
$header['filename'] = fread($zip,$header['filename_len']);
}else{
$header['filename'] = '';
}
if ($header['extra_len'] != 0){
$header['extra'] = fread($zip, $header['extra_len']);
}else{
$header['extra'] = '';
}
if ($header['comment_len'] != 0){
$header['comment'] = fread($zip, $header['comment_len']);
}else{
$header['comment'] = '';
}
if ($header['mdate'] && $header['mtime']) {
$hour = ($header['mtime'] & 0xF800) >> 11;
$minute = ($header['mtime'] & 0x07E0) >> 5;
$seconde = ($header['mtime'] & 0x001F)*2;
$year = (($header['mdate'] & 0xFE00) >> 9) + 1980;
$month = ($header['mdate'] & 0x01E0) >> 5;
$day = $header['mdate'] & 0x001F;
$header['mtime'] = mktime($hour, $minute, $seconde, $month, $day, $year);
} else {
$header['mtime'] = time();
}
$header['stored_filename'] = $header['filename'];
$header['status'] = 'ok';
if (substr($header['filename'], -1) == '/') $header['external'] = 0x41FF0010;
return $header;
}
function ReadCentralDir($zip,$zip_name) {
$size = filesize($zip_name);
if ($size < 277){
$maximum_size = $size;
} else {
$maximum_size=277;
}
@fseek($zip, $size-$maximum_size);
$pos = ftell($zip);
$bytes = 0x00000000;
while ($pos < $size) {
$byte = @fread($zip, 1);
$bytes=(($bytes << 8) & 0xFFFFFFFF) | Ord($byte);
if ($bytes == 0x504b0506){
$pos++;
break;
}
$pos++;
}
$data=unpack('vdisk/vdisk_start/vdisk_entries/ventries/Vsize/Voffset/vcomment_size',
fread($zip, 18));
if ($data['comment_size'] != 0){
$centd['comment'] = fread($zip, $data['comment_size']);
} else {
$centd['comment'] = '';
}
$centd['entries'] = $data['entries'];
$centd['disk_entries'] = $data['disk_entries'];
$centd['offset'] = $data['offset'];
$centd['disk_start'] = $data['disk_start'];
$centd['size'] = $data['size'];
$centd['disk'] = $data['disk'];
return $centd;
}
function ExtractFile($header,$to,$zip) {
$header = $this->readfileheader($zip, $header);
if(substr($to,-1)!="/") $to.="/";
if(substr($header['filename'],-1)=="/") {
$this->_mkdir($to.$header['filename']);
return +2;
}
if (!$this->_mkdir($to.dirname($header['filename']))) return (-1);
if (!array_key_exists("external", $header) || (!($header['external']==0x41FF0010)&&!($header['external']==16))) {
if ($header['compression']==0) {
$fp = @fopen($to.$header['filename'], 'wb');
if(!$fp) return(-1);
$size = $header['compressed_size'];
while ($size != 0) {
$read_size = ($size < 2048 ? $size : 2048);
$buffer = fread($zip, $read_size);
$binary_data = pack('a'.$read_size, $buffer);
@fwrite($fp, $binary_data, $read_size);
$size -= $read_size;
}
fclose($fp);
touch($to.$header['filename'], $header['mtime']);
}else{
if (!is_dir(dirname($to.$header['filename']))) $this->_mkdir(dirname($to.$header['filename']));
$fp = fopen($to.$header['filename'].'.gz','wb');
if(!$fp) return(-1);
$binary_data = pack('va1a1Va1a1', 0x8b1f, Chr($header['compression']),
Chr(0x00), time(), Chr(0x00), Chr(3));
fwrite($fp, $binary_data, 10);
$size = $header['compressed_size'];
while ($size != 0) {
$read_size = ($size < 1024 ? $size : 1024);
$buffer = fread($zip, $read_size);
$binary_data = pack('a'.$read_size, $buffer);
@fwrite($fp, $binary_data, $read_size);
$size -= $read_size;
}
$binary_data = pack('VV', $header['crc'], $header['size']);
fwrite($fp, $binary_data,8);
fclose($fp);
$gzp = @gzopen($to.$header['filename'].'.gz','rb');
if(!$gzp){
@gzclose($gzp);
@unlink($to.$header['filename']);
die("Archive is compressed whereas ZLIB is not enabled.");
}
$fp = @fopen($to.$header['filename'],'wb');
if(!$fp) return(-1);
$size = $header['size'];
while ($size != 0) {
$read_size = ($size < 2048 ? $size : 2048);
$buffer = gzread($gzp, $read_size);
$binary_data = pack('a'.$read_size, $buffer);
@fwrite($fp, $binary_data, $read_size);
$size -= $read_size;
}
fclose($fp);
gzclose($gzp);
touch($to.$header['filename'], $header['mtime']);
@unlink($to.$header['filename'].'.gz');
}
}
return true;
}
/**
* centralize mkdir calls and use dokuwiki io functions
*
* @author Christopher Smith <chris@jalakai.co.uk>
*/
function _mkdir($d) {
return io_mkdir_p($d);
}
function ExtractStr($zn, $name) {
$ok = 0;
$zip = @fopen($zn,'rb');
if(!$zip) return(null);
$cdir = $this->ReadCentralDir($zip,$zn);
$pos_entry = $cdir['offset'];
for ($i=0; $i<$cdir['entries']; $i++) {
@fseek($zip, $pos_entry);
$header = $this->ReadCentralFileHeaders($zip);
$header['index'] = $i;
$pos_entry = ftell($zip);
@rewind($zip);
fseek($zip, $header['offset']);
if ($name == $header['stored_filename'] || $name == $header['filename']) {
$str = $this->ExtractStrFile($header, $zip);
fclose($zip);
return $str;
}
}
fclose($zip);
return null;
}
function ExtractStrFile($header,$zip) {
$hdr = $this->readfileheader($zip);
$binary_data = '';
if (!($header['external']==0x41FF0010) && !($header['external']==16)) {
if ($header['compression']==0) {
while ($size != 0) {
$read_size = ($size < 2048 ? $size : 2048);
$buffer = fread($zip, $read_size);
$binary_data .= pack('a'.$read_size, $buffer);
$size -= $read_size;
}
return $binary_data;
} else {
$size = $header['compressed_size'];
if ($size == 0) {
return '';
}
//Just in case
if ($size > ($this->_ret_bytes(ini_get('memory_limit'))/2)) {
die("Compressed file is to huge to be uncompress in memory.");
}
while ($size != 0)
{
$read_size = ($size < 2048 ? $size : 2048);
$buffer = fread($zip, $read_size);
$binary_data .= pack('a'.$read_size, $buffer);
$size -= $read_size;
}
$str = gzinflate($binary_data, $header['size']);
if ($header['crc'] == crc32($str)) {
return $str;
} else {
die("Crc Error");
}
}
}
return null;
}
function _ret_bytes($val) {
$val = trim($val);
$last = $val{strlen($val)-1};
switch($last) {
case 'k':
case 'K':
return (int) $val * 1024;
break;
case 'm':
case 'M':
return (int) $val * 1048576;
break;
default:
return $val;
}
}
}
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