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| -rw-r--r-- | system/libraries/Zip.php | 154 |
1 files changed, 154 insertions, 0 deletions
diff --git a/system/libraries/Zip.php b/system/libraries/Zip.php new file mode 100644 index 000000000..9cfe9593d --- /dev/null +++ b/system/libraries/Zip.php @@ -0,0 +1,154 @@ +<?php if (!defined('BASEPATH')) exit('No direct script access allowed'); +/** + * Code Igniter + * + * An open source application development framework for PHP 4.3.2 or newer + * + * @package CodeIgniter + * @author Rick Ellis + * @copyright Copyright (c) 2006, pMachine, Inc. + * @license http://www.codeignitor.com/user_guide/license.html + * @link http://www.codeigniter.com + * @since Version 1.0 + * @filesource + */ + +// ------------------------------------------------------------------------ + +/** + * Zip Compression Class + * + * This class is based on a library aquired at Zend: + * http://www.zend.com/codex.php?id=696&single=1 + * + * I'm not sure this library is all that reliable, but it's the only + * zip compressor I'm aware of -- Rick Ellis + * + * @package CodeIgniter + * @subpackage Libraries + * @category Encryption + * @author Rick Ellis + * @link http://www.codeigniter.com/user_guide/general/encryption.html + */ +class Zip { + + var $zdata = array(); + var $cdir = array(); + var $offset = 0; + + /** + * Add a Directory + * + * @access public + * @param string + * @return void + */ + function add_dir($name) + { + $name =str_replace ("\\", "/", $name); + + $fd = "\x50\x4b\x03\x04\x0a\x00\x00\x00\x00\x00\x00\x00\x00\x00" + .pack("V", 0) + .pack("V", 0) + .pack("V", 0) + .pack("v", strlen($name)) + .pack("v", 0) + .$name; + + $this->cdata[] = $fd; + + $cd = "\x50\x4b\x01\x02\x00\x00\x0a\x00\x00\x00\x00\x00\x00\x00\x00\x00" + .pack("V", 0) + .pack("V", 0) + .pack("V", 0) + .pack("v", strlen ($name)) + .pack("v", 0) + .pack("v", 0) + .pack("v", 0) + .pack("v", 0) + .pack("V", 16) + .pack("V", $this->offset) + .$name; + + $this->offset = strlen(implode('', $this->cdata)); + + $this->cdir[] = $cd; + } + + // -------------------------------------------------------------------- + + /** + * Add a File + * + * @access public + * @param string + * @return void + */ + function add_file($data, $name) + { + $name = str_replace("\\", "/", $name); + + $u_len = strlen($data); + $crc = crc32($data); + $data = gzcompress($data); + $data = substr(substr($data, 0,strlen ($data) - 4), 2); + $c_len = strlen($data); + + $fd = "\x50\x4b\x03\x04\x14\x00\x00\x00\x08\x00\x00\x00\x00\x00" + .pack("V", $crc) + .pack("V", $c_len) + .pack("V", $u_len) + .pack("v", strlen($name)) + .pack("v", 0) + .$name + .$data + .pack("V", $crc) + .pack("V", $c_len) + .pack("V", $u_len); + + $this->zdata[] = $fd; + + $cd = "\x50\x4b\x01\x02\x00\x00\x14\x00\x00\x00\x08\x00\x00\x00\x00\x00" + .pack("V", $crc) + .pack("V", $c_len) + .pack("V", $u_len) + .pack("v", strlen ($name)) + .pack("v", 0) + .pack("v", 0) + .pack("v", 0) + .pack("v", 0) + .pack("V", 32 ) + .pack("V", $this->offset) + .$name; + + $this->offset = strlen(implode('', $this->zdata)); + + $this->cdir[] = $cd; + } + + // -------------------------------------------------------------------- + + /** + * Output the zip file + * + * @access public + * @return string + */ + function output_zipfile() + { + $data = implode("", $this->zdata); + $cdir = implode("", $this->cdir); + + return $data + .$cdir + ."\x50\x4b\x05\x06\x00\x00\x00\x00" + .pack("v", sizeof($this->cdir)) + .pack("v", sizeof($this->cdir)) + .pack("V", strlen($cdir)) + .pack("V", strlen($data)) + ."\x00\x00"; + } + +} +// END CLASS +?>
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