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<?php defined('BASEPATH') or exit('No direct script access allowed');
/**
* UnZip Class
*
* This class is based on a library I found at PHPClasses:
* http://phpclasses.org/package/2495-PHP-Pack-and-unpack-files-packed-in-ZIP-archives.html
*
* The original library is a little rough around the edges so I
* refactored it and added several additional methods -- Phil Sturgeon
*
* This class requires extension ZLib Enabled.
*
* @package CodeIgniter
* @subpackage Libraries
* @category Encryption
* @author Alexandre Tedeschi
* @author Phil Sturgeon
* @author Don Myers
* @link http://bitbucket.org/philsturgeon/codeigniter-unzip
* @license
* @version 1.0.0
*/
class Unzip {
private $compressed_list = array();
// List of files in the ZIP
private $central_dir_list = array();
// Central dir list... It's a kind of 'extra attributes' for a set of files
private $end_of_central = array();
// End of central dir, contains ZIP Comments
private $info = array();
private $error = array();
private $_zip_file = '';
private $_target_dir = FALSE;
private $apply_chmod = 0777;
private $fh;
private $zip_signature = "\x50\x4b\x03\x04";
// local file header signature
private $dir_signature = "\x50\x4b\x01\x02";
// central dir header signature
private $central_signature_end = "\x50\x4b\x05\x06";
// ignore these directories (useless meta data)
private $_skip_dirs = array('__MACOSX');
private $_allow_extensions = NULL; // What is allowed out of the zip
// --------------------------------------------------------------------
/**
* Constructor
*
* @access Public
* @param string
* @return none
*/
function __construct()
{
log_message('debug', 'Unzip Class Initialized');
}
// --------------------------------------------------------------------
/**
* re inizilize all variables
* @access Private
* @param none
* @return none
*/
private function _reinit()
{
$this->compressed_list = array();
$this->central_dir_list = array();
$this->end_of_central = array();
$this->info = array();
$this->error = array();
}
/**
* Unzip all files in archive.
*
* @access Public
* @param none
* @return none
*/
public function extract($zip_file, $target_dir = NULL, $preserve_filepath = TRUE)
{
$this->_reinit();
$this->_zip_file = $zip_file;
$this->_target_dir = $target_dir ? $target_dir : dirname($this->_zip_file);
if ( ! $files = $this->_list_files())
{
$this->set_error('ZIP folder was empty.');
return FALSE;
}
$file_locations = array();
foreach ($files as $file => $trash)
{
$dirname = pathinfo($file, PATHINFO_DIRNAME);
$extension = pathinfo($file, PATHINFO_EXTENSION);
$folders = explode('/', $dirname);
$out_dn = $this->_target_dir . '/' . $dirname;
// Skip stuff in stupid folders
if (in_array(current($folders), $this->_skip_dirs))
{
continue;
}
// Skip any files that are not allowed
if (is_array($this->_allow_extensions) AND $extension AND ! in_array($extension, $this->_allow_extensions))
{
continue;
}
if ( ! is_dir($out_dn) AND $preserve_filepath)
{
$str = "";
foreach ($folders as $folder)
{
$str = $str ? $str . '/' . $folder : $folder;
if ( ! is_dir($this->_target_dir . '/' . $str))
{
$this->set_debug('Creating folder: ' . $this->_target_dir . '/' . $str);
if ( ! @mkdir($this->_target_dir . '/' . $str))
{
$this->set_error('Desitnation path is not writable.');
return FALSE;
}
// Apply chmod if configured to do so
$this->apply_chmod AND chmod($this->_target_dir . '/' . $str, $this->apply_chmod);
}
}
}
if (substr($file, -1, 1) == '/') continue;
$file_locations[] = $file_location = $this->_target_dir . '/' . ($preserve_filepath ? $file : basename($file));
$this->_extract_file($file, $file_location);
}
$this->compressed_list = array();
return $file_locations;
}
// --------------------------------------------------------------------
/**
* What extensions do we want out of this ZIP
*
* @access Public
* @param none
* @return none
*/
public function allow($ext = NULL)
{
$this->_allow_extensions = $ext;
}
// --------------------------------------------------------------------
/**
* Show error messages
*
* @access public
* @param string
* @return string
*/
public function error_string($open = '<p>', $close = '</p>')
{
return $open . implode($close . $open, $this->error) . $close;
}
// --------------------------------------------------------------------
/**
* Show debug messages
*
* @access public
* @param string
* @return string
*/
public function debug_string($open = '<p>', $close = '</p>')
{
return $open . implode($close . $open, $this->info) . $close;
}
// --------------------------------------------------------------------
/**
* Save errors
*
* @access Private
* @param string
* @return none
*/
function set_error($string)
{
$this->error[] = $string;
}
// --------------------------------------------------------------------
/**
* Save debug data
*
* @access Private
* @param string
* @return none
*/
function set_debug($string)
{
$this->info[] = $string;
}
// --------------------------------------------------------------------
/**
* List all files in archive.
*
* @access Public
* @param boolean
* @return mixed
*/
private function _list_files($stop_on_file = FALSE)
{
if (sizeof($this->compressed_list))
{
$this->set_debug('Returning already loaded file list.');
return $this->compressed_list;
}
// Open file, and set file handler
$fh = fopen($this->_zip_file, 'r');
$this->fh = &$fh;
if ( ! $fh)
{
$this->set_error('Failed to load file: ' . $this->_zip_file);
return FALSE;
}
$this->set_debug('Loading list from "End of Central Dir" index list...');
if ( ! $this->_load_file_list_by_eof($fh, $stop_on_file))
{
$this->set_debug('Failed! Trying to load list looking for signatures...');
if ( ! $this->_load_files_by_signatures($fh, $stop_on_file))
{
$this->set_debug('Failed! Could not find any valid header.');
$this->set_error('ZIP File is corrupted or empty');
return FALSE;
}
}
return $this->compressed_list;
}
// --------------------------------------------------------------------
/**
* Unzip file in archive.
*
* @access Public
* @param string, boolean
* @return Unziped file.
*/
private function _extract_file($compressed_file_name, $target_file_name = FALSE)
{
if ( ! sizeof($this->compressed_list))
{
$this->set_debug('Trying to unzip before loading file list... Loading it!');
$this->_list_files(FALSE, $compressed_file_name);
}
$fdetails = &$this->compressed_list[$compressed_file_name];
if ( ! isset($this->compressed_list[$compressed_file_name]))
{
$this->set_error('File "<strong>$compressed_file_name</strong>" is not compressed in the zip.');
return FALSE;
}
if (substr($compressed_file_name, -1) == '/')
{
$this->set_error('Trying to unzip a folder name "<strong>$compressed_file_name</strong>".');
return FALSE;
}
if ( ! $fdetails['uncompressed_size'])
{
$this->set_debug('File "<strong>$compressed_file_name</strong>" is empty.');
return $target_file_name ? file_put_contents($target_file_name, '') : '';
}
fseek($this->fh, $fdetails['contents_start_offset']);
$ret = $this->_uncompress(
fread($this->fh, $fdetails['compressed_size']),
$fdetails['compression_method'],
$fdetails['uncompressed_size'],
$target_file_name
);
if ($this->apply_chmod AND $target_file_name)
{
chmod($target_file_name, FILE_READ_MODE);
}
return $ret;
}
// --------------------------------------------------------------------
/**
* Free the file resource.
*
* @access Public
* @param none
* @return none
*/
public function close()
{
// Free the file resource
if ($this->fh)
{
fclose($this->fh);
}
}
// --------------------------------------------------------------------
/**
* Free the file resource Automatic destroy.
*
* @access Public
* @param none
* @return none
*/
public function __destroy()
{
$this->close();
}
// --------------------------------------------------------------------
/**
* Uncompress file. And save it to the targetFile.
*
* @access Private
* @param Filecontent, int, int, boolean
* @return none
*/
private function _uncompress($content, $mode, $uncompressed_size, $target_file_name = FALSE)
{
switch ($mode)
{
case 0:
return $target_file_name ? file_put_contents($target_file_name, $content) : $content;
case 1:
$this->set_error('Shrunk mode is not supported... yet?');
return FALSE;
case 2:
case 3:
case 4:
case 5:
$this->set_error('Compression factor ' . ($mode - 1) . ' is not supported... yet?');
return FALSE;
case 6:
$this->set_error('Implode is not supported... yet?');
return FALSE;
case 7:
$this->set_error('Tokenizing compression algorithm is not supported... yet?');
return FALSE;
case 8:
// Deflate
return $target_file_name ?
file_put_contents($target_file_name, gzinflate($content, $uncompressed_size)) :
gzinflate($content, $uncompressed_size);
case 9:
$this->set_error('Enhanced Deflating is not supported... yet?');
return FALSE;
case 10:
$this->set_error('PKWARE Date Compression Library Impoloding is not supported... yet?');
return FALSE;
case 12:
// Bzip2
return $target_file_name ?
file_put_contents($target_file_name, bzdecompress($content)) :
bzdecompress($content);
case 18:
$this->set_error('IBM TERSE is not supported... yet?');
return FALSE;
default:
$this->set_error('Unknown uncompress method: $mode');
return FALSE;
}
}
private function _load_file_list_by_eof(&$fh, $stop_on_file = FALSE)
{
// Check if there's a valid Central Dir signature.
// Let's consider a file comment smaller than 1024 characters...
// Actually, it length can be 65536.. But we're not going to support it.
for ($x = 0; $x < 1024; $x++)
{
fseek($fh, -22 - $x, SEEK_END);
$signature = fread($fh, 4);
if ($signature == $this->central_signature_end)
{
// If found EOF Central Dir
$eodir['disk_number_this'] = unpack("v", fread($fh, 2)); // number of this disk
$eodir['disk_number'] = unpack("v", fread($fh, 2)); // number of the disk with the start of the central directory
$eodir['total_entries_this'] = unpack("v", fread($fh, 2)); // total number of entries in the central dir on this disk
$eodir['total_entries'] = unpack("v", fread($fh, 2)); // total number of entries in
$eodir['size_of_cd'] = unpack("V", fread($fh, 4)); // size of the central directory
$eodir['offset_start_cd'] = unpack("V", fread($fh, 4)); // offset of start of central directory with respect to the starting disk number
$zip_comment_lenght = unpack("v", fread($fh, 2)); // zipfile comment length
$eodir['zipfile_comment'] = $zip_comment_lenght[1] ? fread($fh, $zip_comment_lenght[1]) : ''; // zipfile comment
$this->end_of_central = array(
'disk_number_this' => $eodir['disk_number_this'][1],
'disk_number' => $eodir['disk_number'][1],
'total_entries_this' => $eodir['total_entries_this'][1],
'total_entries' => $eodir['total_entries'][1],
'size_of_cd' => $eodir['size_of_cd'][1],
'offset_start_cd' => $eodir['offset_start_cd'][1],
'zipfile_comment' => $eodir['zipfile_comment'],
);
// Then, load file list
fseek($fh, $this->end_of_central['offset_start_cd']);
$signature = fread($fh, 4);
while ($signature == $this->dir_signature)
{
$dir['version_madeby'] = unpack("v", fread($fh, 2)); // version made by
$dir['version_needed'] = unpack("v", fread($fh, 2)); // version needed to extract
$dir['general_bit_flag'] = unpack("v", fread($fh, 2)); // general purpose bit flag
$dir['compression_method'] = unpack("v", fread($fh, 2)); // compression method
$dir['lastmod_time'] = unpack("v", fread($fh, 2)); // last mod file time
$dir['lastmod_date'] = unpack("v", fread($fh, 2)); // last mod file date
$dir['crc-32'] = fread($fh, 4); // crc-32
$dir['compressed_size'] = unpack("V", fread($fh, 4)); // compressed size
$dir['uncompressed_size'] = unpack("V", fread($fh, 4)); // uncompressed size
$zip_file_length = unpack("v", fread($fh, 2)); // filename length
$extra_field_length = unpack("v", fread($fh, 2)); // extra field length
$fileCommentLength = unpack("v", fread($fh, 2)); // file comment length
$dir['disk_number_start'] = unpack("v", fread($fh, 2)); // disk number start
$dir['internal_attributes'] = unpack("v", fread($fh, 2)); // internal file attributes-byte1
$dir['external_attributes1'] = unpack("v", fread($fh, 2)); // external file attributes-byte2
$dir['external_attributes2'] = unpack("v", fread($fh, 2)); // external file attributes
$dir['relative_offset'] = unpack("V", fread($fh, 4)); // relative offset of local header
$dir['file_name'] = fread($fh, $zip_file_length[1]); // filename
$dir['extra_field'] = $extra_field_length[1] ? fread($fh, $extra_field_length[1]) : ''; // extra field
$dir['file_comment'] = $fileCommentLength[1] ? fread($fh, $fileCommentLength[1]) : ''; // file comment
// Convert the date and time, from MS-DOS format to UNIX Timestamp
$binary_mod_date = str_pad(decbin($dir['lastmod_date'][1]), 16, '0', STR_PAD_LEFT);
$binary_mod_time = str_pad(decbin($dir['lastmod_time'][1]), 16, '0', STR_PAD_LEFT);
$last_mod_year = bindec(substr($binary_mod_date, 0, 7)) + 1980;
$last_mod_month = bindec(substr($binary_mod_date, 7, 4));
$last_mod_day = bindec(substr($binary_mod_date, 11, 5));
$last_mod_hour = bindec(substr($binary_mod_time, 0, 5));
$last_mod_minute = bindec(substr($binary_mod_time, 5, 6));
$last_mod_second = bindec(substr($binary_mod_time, 11, 5));
$this->central_dir_list[$dir['file_name']] = array(
'version_madeby' => $dir['version_madeby'][1],
'version_needed' => $dir['version_needed'][1],
'general_bit_flag' => str_pad(decbin($dir['general_bit_flag'][1]), 8, '0', STR_PAD_LEFT),
'compression_method' => $dir['compression_method'][1],
'lastmod_datetime' => mktime($last_mod_hour, $last_mod_minute, $last_mod_second, $last_mod_month, $last_mod_day, $last_mod_year),
'crc-32' => str_pad(dechex(ord($dir['crc-32'][3])), 2, '0', STR_PAD_LEFT) .
str_pad(dechex(ord($dir['crc-32'][2])), 2, '0', STR_PAD_LEFT) .
str_pad(dechex(ord($dir['crc-32'][1])), 2, '0', STR_PAD_LEFT) .
str_pad(dechex(ord($dir['crc-32'][0])), 2, '0', STR_PAD_LEFT),
'compressed_size' => $dir['compressed_size'][1],
'uncompressed_size' => $dir['uncompressed_size'][1],
'disk_number_start' => $dir['disk_number_start'][1],
'internal_attributes' => $dir['internal_attributes'][1],
'external_attributes1' => $dir['external_attributes1'][1],
'external_attributes2' => $dir['external_attributes2'][1],
'relative_offset' => $dir['relative_offset'][1],
'file_name' => $dir['file_name'],
'extra_field' => $dir['extra_field'],
'file_comment' => $dir['file_comment'],
);
$signature = fread($fh, 4);
}
// If loaded centralDirs, then try to identify the offsetPosition of the compressed data.
if ($this->central_dir_list)
{
foreach ($this->central_dir_list as $filename => $details)
{
$i = $this->_get_file_header($fh, $details['relative_offset']);
$this->compressed_list[$filename]['file_name'] = $filename;
$this->compressed_list[$filename]['compression_method'] = $details['compression_method'];
$this->compressed_list[$filename]['version_needed'] = $details['version_needed'];
$this->compressed_list[$filename]['lastmod_datetime'] = $details['lastmod_datetime'];
$this->compressed_list[$filename]['crc-32'] = $details['crc-32'];
$this->compressed_list[$filename]['compressed_size'] = $details['compressed_size'];
$this->compressed_list[$filename]['uncompressed_size'] = $details['uncompressed_size'];
$this->compressed_list[$filename]['lastmod_datetime'] = $details['lastmod_datetime'];
$this->compressed_list[$filename]['extra_field'] = $i['extra_field'];
$this->compressed_list[$filename]['contents_start_offset'] = $i['contents_start_offset'];
if (strtolower($stop_on_file) == strtolower($filename))
{
break;
}
}
}
return TRUE;
}
}
return FALSE;
}
private function _load_files_by_signatures(&$fh, $stop_on_file = FALSE)
{
fseek($fh, 0);
$return = FALSE;
for (;;)
{
$details = $this->_get_file_header($fh);
if ( ! $details)
{
$this->set_debug('Invalid signature. Trying to verify if is old style Data Descriptor...');
fseek($fh, 12 - 4, SEEK_CUR); // 12: Data descriptor - 4: Signature (that will be read again)
$details = $this->_get_file_header($fh);
}
if ( ! $details)
{
$this->set_debug('Still invalid signature. Probably reached the end of the file.');
break;
}
$filename = $details['file_name'];
$this->compressed_list[$filename] = $details;
$return = true;
if (strtolower($stop_on_file) == strtolower($filename))
{
break;
}
}
return $return;
}
private function _get_file_header(&$fh, $start_offset = FALSE)
{
if ($start_offset !== FALSE)
{
fseek($fh, $start_offset);
}
$signature = fread($fh, 4);
if ($signature == $this->zip_signature)
{
// Get information about the zipped file
$file['version_needed'] = unpack("v", fread($fh, 2)); // version needed to extract
$file['general_bit_flag'] = unpack("v", fread($fh, 2)); // general purpose bit flag
$file['compression_method'] = unpack("v", fread($fh, 2)); // compression method
$file['lastmod_time'] = unpack("v", fread($fh, 2)); // last mod file time
$file['lastmod_date'] = unpack("v", fread($fh, 2)); // last mod file date
$file['crc-32'] = fread($fh, 4); // crc-32
$file['compressed_size'] = unpack("V", fread($fh, 4)); // compressed size
$file['uncompressed_size'] = unpack("V", fread($fh, 4)); // uncompressed size
$zip_file_length = unpack("v", fread($fh, 2)); // filename length
$extra_field_length = unpack("v", fread($fh, 2)); // extra field length
$file['file_name'] = fread($fh, $zip_file_length[1]); // filename
$file['extra_field'] = $extra_field_length[1] ? fread($fh, $extra_field_length[1]) : ''; // extra field
$file['contents_start_offset'] = ftell($fh);
// Bypass the whole compressed contents, and look for the next file
fseek($fh, $file['compressed_size'][1], SEEK_CUR);
// Convert the date and time, from MS-DOS format to UNIX Timestamp
$binary_mod_date = str_pad(decbin($file['lastmod_date'][1]), 16, '0', STR_PAD_LEFT);
$binary_mod_time = str_pad(decbin($file['lastmod_time'][1]), 16, '0', STR_PAD_LEFT);
$last_mod_year = bindec(substr($binary_mod_date, 0, 7)) + 1980;
$last_mod_month = bindec(substr($binary_mod_date, 7, 4));
$last_mod_day = bindec(substr($binary_mod_date, 11, 5));
$last_mod_hour = bindec(substr($binary_mod_time, 0, 5));
$last_mod_minute = bindec(substr($binary_mod_time, 5, 6));
$last_mod_second = bindec(substr($binary_mod_time, 11, 5));
// Mount file table
$i = array(
'file_name' => $file['file_name'],
'compression_method' => $file['compression_method'][1],
'version_needed' => $file['version_needed'][1],
'lastmod_datetime' => mktime($last_mod_hour, $last_mod_minute, $last_mod_second, $last_mod_month, $last_mod_day, $last_mod_year),
'crc-32' => str_pad(dechex(ord($file['crc-32'][3])), 2, '0', STR_PAD_LEFT) .
str_pad(dechex(ord($file['crc-32'][2])), 2, '0', STR_PAD_LEFT) .
str_pad(dechex(ord($file['crc-32'][1])), 2, '0', STR_PAD_LEFT) .
str_pad(dechex(ord($file['crc-32'][0])), 2, '0', STR_PAD_LEFT),
'compressed_size' => $file['compressed_size'][1],
'uncompressed_size' => $file['uncompressed_size'][1],
'extra_field' => $file['extra_field'],
'general_bit_flag' => str_pad(decbin($file['general_bit_flag'][1]), 8, '0', STR_PAD_LEFT),
'contents_start_offset' => $file['contents_start_offset']
);
return $i;
}
return FALSE;
}
}
/* End of file Unzip.php */
/* Location: ./system/libraries/Unzip.php */
ACC SHELL 2018