File: /var/www/ilya/data/www/kamforum.ru/modules/gallery/lib/zip.lib.php
<?php
/*
+--------------------------------------------------------------------------
| Invision Gallery Module v<#VERSION#>
| ========================================
| by Adam Kinder
| (c) 2001 - 2005 Invision Power Services
| http://www.invisionpower.com
| ========================================
| Email: adam@invisionpower.com
+---------------------------------------------------------------------------
| > Date December 18, 2005, 4:59 pm
| > Release f5ba00991bc63895d988f560e497967f
| > Main Module
| > Original Script written by Joshua Williams
| > $Id$
+---------------------------------------------------------------------------
*/
/**
* Zip file creation class.
* Makes zip files.
*
* Based on :
*
* http://www.zend.com/codex.php?id=535&single=1
* By Eric Mueller (eric@themepark.com)
*
* http://www.zend.com/codex.php?id=470&single=1
* by Denis125 (webmaster@atlant.ru)
*
* Official ZIP file format: http://www.pkware.com/appnote.txt
*
* Fixed by Matt Mecham
*
* @access public
*/
class zipfile
{
/**
* Array to store compressed data
*
* @var array $datasec
*/
var $datasec = array();
/**
* Central directory
*
* @var array $ctrl_dir
*/
var $ctrl_dir = array();
/**
* End of central directory record
*
* @var string $eof_ctrl_dir
*/
var $eof_ctrl_dir = "\x50\x4b\x05\x06\x00\x00\x00\x00";
/**
* Last offset position
*
* @var integer $old_offset
*/
var $old_offset = 0;
function add_dir($name)
// adds "directory" to archive - do this before putting any files in directory!
// $name - name of directory... like this: "path/"
// ...then you can add files using add_file with names like "path/file.txt"
{
$name = str_replace("\\", "/", $name);
if ( $name == "" )
{
return;
}
//print $name."<br />";
//get the date you want in PHP format
$date = getdate();
//shift the bits around to MS-DOS format
$date = (($date['year'] - 1980) << 25) | ($date['mon'] << 21) | ($date['mday'] << 16) | ($date['hours'] << 11) | ($date['minutes'] << 5) | ($date['seconds'] >> 1);
//Pack it in (replacing the existing "\x00\x00\x00\x00" entries)
$date = pack("V",$date); // last mod time and date
$fr = "\x50\x4b\x03\x04";
$fr .= "\x0a\x00"; // ver needed to extract
$fr .= "\x00\x00"; // gen purpose bit flag
$fr .= "\x00\x00"; // compression method
$fr .= $date; // last mod time and date
$fr .= pack("V",0); // crc32
$fr .= pack("V",0); //compressed filesize
$fr .= pack("V",0); //uncompressed filesize
$fr .= pack("v", strlen($name) ); //length of pathname
$fr .= pack("v", 0 ); //extra field length
$fr .= $name;
// end of "local file header" segment
// no "file data" segment for path
// "data descriptor" segment (optional but necessary if archive is not served as file)
//$fr .= pack("V",$crc); //crc32
//$fr .= pack("V",$c_len); //compressed filesize
//$fr .= pack("V",$unc_len); //uncompressed filesize
// add this entry to array
$this -> datasec[] = $fr;
$new_offset = strlen(implode("", $this->datasec));
// ext. file attributes mirrors MS-DOS directory attr byte, detailed
// at http://support.microsoft.com/support/kb/articles/Q125/0/19.asp
// now add to central record
$cdrec = "\x50\x4b\x01\x02";
$cdrec .="\x00\x00"; // version made by
$cdrec .="\x0a\x00"; // version needed to extract
$cdrec .="\x00\x00"; // gen purpose bit flag
$cdrec .="\x00\x00"; // compression method
$cdrec .= $date; // last mod time & date
$cdrec .= pack("V",0); // crc32
$cdrec .= pack("V",0); //compressed filesize
$cdrec .= pack("V",0); //uncompressed filesize
$cdrec .= pack("v", strlen($name) ); //length of filename
$cdrec .= pack("v", 0 ); //extra field length
$cdrec .= pack("v", 0 ); //file comment length
$cdrec .= pack("v", 0 ); //disk number start
$cdrec .= pack("v", 0 ); //internal file attributes
$ext = "\x00\x00\x10\x00";
$ext = "\xff\xff\xff\xff";
$cdrec .= pack("V", 16 ); //external file attributes - 'directory' bit set
$cdrec .= pack("V", $this -> old_offset ); //relative offset of local header
$this -> old_offset = $new_offset;
$cdrec .= $name;
// optional extra field, file comment goes here
// save to array
$this -> ctrl_dir[] = $cdrec;
}
/**
* Adds "file" to archive
*
* @param string file contents
* @param string name of the file in the archive (may contains the path)
*
* @access public
*/
function add_file($data, $name)
{
$name = str_replace('\\', '/', $name);
//get the date you want in PHP format
$date = getdate();
//shift the bits around to MS-DOS format
$date = (($date['year'] - 1980) << 25) | ($date['mon'] << 21) | ($date['mday'] << 16) | ($date['hours'] << 11) | ($date['minutes'] << 5) | ($date['seconds'] >> 1);
//Pack it in (replacing the existing "\x00\x00\x00\x00" entries)
$date = pack("V",$date); // last mod time and date
$fr = "\x50\x4b\x03\x04";
$fr .= "\x14\x00"; // ver needed to extract
$fr .= "\x00\x00"; // gen purpose bit flag
$fr .= "\x08\x00"; // compression method
//$fr .= "\x00\x00\x00\x00"; // last mod time & date
$fr .= $date;
// "local file header" segment
$unc_len = strlen($data);
$crc = crc32($data);
$zdata = gzcompress($data);
$zdata = substr(substr($zdata, 0, strlen($zdata) - 4), 2); // fix crc bug
$c_len = strlen($zdata);
$fr .= pack('V', $crc); // crc32
$fr .= pack('V', $c_len); // compressed filesize
$fr .= pack('V', $unc_len); // uncompressed filesize
$fr .= pack('v', strlen($name)); // length of filename
$fr .= pack('v', 0); // extra field length
$fr .= $name;
// "file data" segment
$fr .= $zdata;
// "data descriptor" segment (optional but necessary if archive is not
// served as file)
//$fr .= pack('V', $crc); // crc32
//$fr .= pack('V', $c_len); // compressed filesize
//$fr .= pack('V', $unc_len); // uncompressed filesize
// add this entry to array
$this -> datasec[] = $fr;
$new_offset = strlen(implode('', $this->datasec));
// now add to central directory record
$cdrec = "\x50\x4b\x01\x02";
$cdrec .= "\x00\x00"; // version made by
$cdrec .= "\x14\x00"; // version needed to extract
$cdrec .= "\x00\x00"; // gen purpose bit flag
$cdrec .= "\x08\x00"; // compression method
//$cdrec .= "\x00\x00\x00\x00"; // last mod time & date
$cdrec .= $date;
$cdrec .= pack('V', $crc); // crc32
$cdrec .= pack('V', $c_len); // compressed filesize
$cdrec .= pack('V', $unc_len); // uncompressed filesize
$cdrec .= pack('v', strlen($name) ); // length of filename
$cdrec .= pack('v', 0 ); // extra field length
$cdrec .= pack('v', 0 ); // file comment length
$cdrec .= pack('v', 0 ); // disk number start
$cdrec .= pack('v', 0 ); // internal file attributes
$cdrec .= pack('V', 32 ); // external file attributes - 'archive' bit set
$cdrec .= pack('V', $this -> old_offset ); // relative offset of local header
$this -> old_offset = $new_offset;
$cdrec .= $name;
// optional extra field, file comment goes here
// save to central directory
$this -> ctrl_dir[] = $cdrec;
} // end of the 'add_file()' method
/**
* Dumps out file
*
* @return string the zipped file
*
* @access public
*/
function file()
{
$data = implode('', $this -> datasec);
$ctrldir = implode('', $this -> ctrl_dir);
return
$data .
$ctrldir .
$this -> eof_ctrl_dir .
pack('v', sizeof($this -> ctrl_dir)) . // total # of entries "on this disk"
pack('v', sizeof($this -> ctrl_dir)) . // total # of entries overall
pack('V', strlen($ctrldir)) . // size of central dir
pack('V', strlen($data)) . // offset to start of central dir
"\x00\x00"; // .zip file comment length
} // end of the 'file()' method
} // end of the 'zipfile' class
?>