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improved the zip dump feature

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This commit is contained in:
Loïc Chapeaux
2001-09-23 09:06:29 +00:00
parent 50c734d0bb
commit 55963749db
8 changed files with 186 additions and 130 deletions
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201
libraries/zip.lib.php3
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@@ -1,6 +1,7 @@
<?php
/* $Id$ */
/**
* Zip file creation class.
* Makes zip files.
@@ -14,110 +15,134 @@
* by Denis125 (webmaster@atlant.ru)
*
* Official ZIP file format: http://www.pkware.com/appnote.txt
*/
/**
* Zip file class
*
* @param
*
* @return
* @access public
*/
class zipfile
{
/**
* Array to store compressed data
*
* @var array $datasec
*/
var $datasec = array();
var $datasec = array(); // array to store compressed data
var $ctrl_dir = array(); // central directory
var $eof_ctrl_dir = "\x50\x4b\x05\x06\x00\x00\x00\x00"; // end of Central directory record
var $old_offset = 0;
/**
* Central directory
*
* @var array $ctrl_dir
*/
var $ctrl_dir = array();
function add_file($data, $name)
/**
* End of central directory record
*
* @var string $eof_ctrl_dir
*/
var $eof_ctrl_dir = "\x50\x4b\x05\x06\x00\x00\x00\x00";
// adds "file" to archive
// $data - file contents
// $name - name of file in archive. Add path if your want
/**
* Last offset position
*
* @var integer $old_offset
*/
var $old_offset = 0;
{
$name = str_replace("\\", "/", $name);
$fr = "\x50\x4b\x03\x04";
$fr .= "\x14\x00"; // ver needed to extract
$fr .= "\x00\x00"; // gen purpose bit flag
$fr .= "\x08\x00"; // compression method
$fr .= "\x00\x00\x00\x00"; // last mod time and date
/**
* Adds "file" to archive
*
* @param string file contents
* @param string name of the file in the archive (may contains the path)
*
* @access public
*/
function add_file($data, $name)
{
$name = str_replace('\\', '/', $name);
$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 and 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;
$unc_len = strlen($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;
// end of "local file header" segment
// "file data" segment
$fr .= $zdata;
$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
// "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;
// add this entry to array
$this -> datasec[] = $fr;
$new_offset = strlen(implode('', $this->datasec));
$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 .= 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
// 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
$cdrec .= pack("V",$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 .= 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;
}
function file() { // dump out file
$data = implode("", $this -> datasec);
$ctrldir = implode("", $this -> ctrl_dir);
// optional extra field, file comment goes here
// save to central directory
$this -> ctrl_dir[] = $cdrec;
} // end of the 'add_file()' method
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
}
}
?>
/**
* 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
?>