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<?php
if (function_exists('zip_open') && function_exists('zip_read') && strtoupper(substr(PHP_OS, 0, 3)) !== 'WIN') {
class N2ZipReader {
public static function read($path) {
$zip = zip_open($path);
if (!is_resource($zip)) {
return array();
}
$data = array();
while ($entry = zip_read($zip)) {
zip_entry_open($zip, $entry, "r");
self::recursiveRead($data, explode('/', zip_entry_name($entry)), zip_entry_read($entry, zip_entry_filesize($entry)));
zip_entry_close($entry);
}
zip_close($zip);
return $data;
}
private static function recursiveRead(&$data, $parts, $content) {
if (count($parts) == 1) {
$data[$parts[0]] = $content;
} else {
if (!isset($data[$parts[0]])) {
$data[$parts[0]] = array();
}
self::recursiveRead($data[array_shift($parts)], $parts, $content);
}
}
}
} else {
class N2ZipReader {
private $fileHandle, $file;
public function __construct($file) {
$this->file = $file;
}
public static function read($path) {
$zip = new N2ZipReader($path);
return $zip->extract();
}
function extract() {
$extractedData = array();
if ( ! is_readable(dirname($this->file))) {
N2Message::error(sprintf(n2_('%s is not readable'), dirname($this->file) ) );
return false;
}
if (!$this->file || !is_file($this->file)) return false;
$filesize = sprintf('%u', filesize($this->file));
$this->fileHandle = fopen($this->file, 'rb');
$fileData = fread($this->fileHandle, $filesize);
$EofCentralDirData = $this->_findEOFCentralDirectoryRecord($filesize);
if (!is_array($EofCentralDirData)) return false;
$centralDirectoryHeaderOffset = $EofCentralDirData['centraldiroffset'];
for ($i = 0; $i < $EofCentralDirData['totalentries']; $i++) {
rewind($this->fileHandle);
fseek($this->fileHandle, $centralDirectoryHeaderOffset);
$centralDirectoryData = $this->_readCentralDirectoryData();
$centralDirectoryHeaderOffset += 46 + $centralDirectoryData['filenamelength'] + $centralDirectoryData['extrafieldlength'] + $centralDirectoryData['commentlength'];
if (!is_array($centralDirectoryData) || substr($centralDirectoryData['filename'], -1) == '/') continue;
$data = $this->_readLocalFileHeaderAndData($centralDirectoryData);
if (!$data) continue;
$dir = dirname($centralDirectoryData['filename']);
$fileName = basename($centralDirectoryData['filename']);
if ($dir != '.' && $dir != '') {
if (!isset($extractedData[$dir])) {
$extractedData[$dir] = array();
}
$extractedData[$dir][$fileName] = $data;
} else {
$extractedData[$fileName] = $data;
}
}
fclose($this->fileHandle);
return $extractedData;
}
function _findEOFCentralDirectoryRecord($filesize) {
fseek($this->fileHandle, $filesize - 22);
$EofCentralDirSignature = unpack('Vsignature', fread($this->fileHandle, 4));
if ($EofCentralDirSignature['signature'] != 0x06054b50) {
$maxLength = 65535 + 22;
$maxLength > $filesize && $maxLength = $filesize;
fseek($this->fileHandle, $filesize - $maxLength);
$searchPos = ftell($this->fileHandle);
while ($searchPos < $filesize) {
fseek($this->fileHandle, $searchPos);
$sigData = unpack('Vsignature', fread($this->fileHandle, 4));
if ($sigData['signature'] == 0x06054b50) {
break;
}
$searchPos++;
}
}
$EofCentralDirData = unpack('vdisknum/vdiskstart/vcentraldirnum/vtotalentries/Vcentraldirsize/Vcentraldiroffset/vcommentlength', fread($this->fileHandle, 18));
return $EofCentralDirData;
}
function _readCentralDirectoryData() {
$centralDirectorySignature = unpack('Vsignature', fread($this->fileHandle, 4));
if ($centralDirectorySignature['signature'] != 0x02014b50) return false;
$centralDirectoryData = fread($this->fileHandle, 42);
$centralDirectoryData = unpack('vmadeversion/vextractversion/vflag/vcompressmethod/vmodtime/vmoddate/Vcrc/Vcompressedsize/Vuncompressedsize/vfilenamelength/vextrafieldlength/vcommentlength/vdiskstart/vinternal/Vexternal/Vlocalheaderoffset', $centralDirectoryData);
$centralDirectoryData['filenamelength'] && $centralDirectoryData['filename'] = fread($this->fileHandle, $centralDirectoryData['filenamelength']);
return $centralDirectoryData;
}
function _readLocalFileHeaderAndData($centralDirectoryData) {
fseek($this->fileHandle, $centralDirectoryData['localheaderoffset']);
$localFileHeaderSignature = unpack('Vsignature', fread($this->fileHandle, 4));
if ($localFileHeaderSignature['signature'] != 0x04034b50) return false;
$localFileHeaderData = fread($this->fileHandle, 26);
$localFileHeaderData = unpack('vextractversion/vflag/vcompressmethod/vmodtime/vmoddate/Vcrc/Vcompressedsize/Vuncompressedsize/vfilenamelength/vextrafieldlength', $localFileHeaderData);
$localFileHeaderData['filenamelength'] && $localFileHeaderData['filename'] = fread($this->fileHandle, $localFileHeaderData['filenamelength']);
if (!$this->_checkLocalFileHeaderAndCentralDir($localFileHeaderData, $centralDirectoryData)) return false;
if ($localFileHeaderData['flag'] & 1) return false;
$compressedData = fread($this->fileHandle, $localFileHeaderData['compressedsize']);
$data = $this->_unCompressData($compressedData, $localFileHeaderData['compressmethod']);
if (crc32($data) != $localFileHeaderData['crc'] || strlen($data) != $localFileHeaderData['uncompressedsize']) return false;
return $data;
}
function _unCompressData($data, $compressMethod) {
if (!$compressMethod) return $data;
switch ($compressMethod) {
case 8 :
$data = gzinflate($data);
break;
default :
return false;
break;
}
return $data;
}
function _checkLocalFileHeaderAndCentralDir($localFileHeaderData, $centralDirectoryData) {
return true;
}
}
}
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