system/libraries/Zip.php - code-igniter-v3-giggi - Gitiles

 <?php  if ( ! defined('BASEPATH')) exit('No direct script access allowed');
 /**
  * CodeIgniter
  *
  * An open source application development framework for PHP 4.3.2 or newer
  *
  * @package		CodeIgniter
  * @author		ExpressionEngine Dev Team
  * @copyright	Copyright (c) 2008 - 2010, EllisLab, Inc.
  * @license		http://codeigniter.com/user_guide/license.html
  * @link		http://codeigniter.com
  * @since		Version 1.0
  * @filesource
  */

 // ------------------------------------------------------------------------

 /**
  * Zip Compression Class
  *
  * This class is based on a library I found at Zend:
  * http://www.zend.com/codex.php?id=696&single=1
  *
  * The original library is a little rough around the edges so I
  * refactored it and added several additional methods -- Rick Ellis
  *
  * @package		CodeIgniter
  * @subpackage	Libraries
  * @category	Encryption
  * @author		ExpressionEngine Dev Team
  * @link		http://codeigniter.com/user_guide/libraries/zip.html
  */
 class CI_Zip  {

 	var $zipdata 	= '';
 	var $directory 	= '';
 	var $entries 	= 0;
 	var $file_num 	= 0;
 	var $offset		= 0;

 	function CI_Zip()
 	{
 		log_message('debug', "Zip Compression Class Initialized");
 	}

 	// --------------------------------------------------------------------

 	/**
 	 * Add Directory
 	 *
 	 * Lets you add a virtual directory into which you can place files.
 	 *
 	 * @access	public
 	 * @param	mixed	the directory name. Can be string or array
 	 * @return	void
 	 */
 	function add_dir($directory)
 	{
 		foreach ((array)$directory as $dir)
 		{
 			if ( ! preg_match("|.+/$|", $dir))
 			{
 				$dir .= '/';
 			}

 			$this->_add_dir($dir);
 		}
 	}

 	// --------------------------------------------------------------------

 	/**
 	 * Add Directory
 	 *
 	 * @access	private
 	 * @param	string	the directory name
 	 * @return	void
 	 */
 	function _add_dir($dir)
 	{
 		$dir = str_replace("\\", "/", $dir);

 		$this->zipdata .=
 			"\x50\x4b\x03\x04\x0a\x00\x00\x00\x00\x00\x00\x00\x00\x00"
 			.pack('V', 0) // crc32
 			.pack('V', 0) // compressed filesize
 			.pack('V', 0) // uncompressed filesize
 			.pack('v', strlen($dir)) // length of pathname
 			.pack('v', 0) // extra field length
 			.$dir
 			// below is "data descriptor" segment
 			.pack('V', 0) // crc32
 			.pack('V', 0) // compressed filesize
 			.pack('V', 0); // uncompressed filesize

 		$this->directory .=
 			"\x50\x4b\x01\x02\x00\x00\x0a\x00\x00\x00\x00\x00\x00\x00\x00\x00"
 			.pack('V',0) // crc32
 			.pack('V',0) // compressed filesize
 			.pack('V',0) // uncompressed filesize
 			.pack('v', strlen($dir)) // length of pathname
 			.pack('v', 0) // extra field length
 			.pack('v', 0) // file comment length
 			.pack('v', 0) // disk number start
 			.pack('v', 0) // internal file attributes
 			.pack('V', 16) // external file attributes - 'directory' bit set
 			.pack('V', $this->offset) // relative offset of local header
 			.$dir;

 		$this->offset = strlen($this->zipdata);
 		$this->entries++;
 	}

 	// --------------------------------------------------------------------

 	/**
 	 * Add Data to Zip
 	 *
 	 * Lets you add files to the archive. If the path is included
 	 * in the filename it will be placed within a directory.  Make
 	 * sure you use add_dir() first to create the folder.
 	 *
 	 * @access	public
 	 * @param	mixed
 	 * @param	string
 	 * @return	void
 	 */
 	function add_data($filepath, $data = NULL)
 	{
 		if (is_array($filepath))
 		{
 			foreach ($filepath as $path => $data)
 			{
 				$this->_add_data($path, $data);
 			}
 		}
 		else
 		{
 			$this->_add_data($filepath, $data);
 		}
 	}

 	// --------------------------------------------------------------------

 	/**
 	 * Add Data to Zip
 	 *
 	 * @access	private
 	 * @param	string	the file name/path
 	 * @param	string	the data to be encoded
 	 * @return	void
 	 */
 	function _add_data($filepath, $data)
 	{
 		$filepath = str_replace("\\", "/", $filepath);

 		$uncompressed_size = strlen($data);
 		$crc32  = crc32($data);

 		$gzdata = gzcompress($data);
 		$gzdata = substr($gzdata, 2, -4);
 		$compressed_size = strlen($gzdata);

 		$this->zipdata .=
 			"\x50\x4b\x03\x04\x14\x00\x00\x00\x08\x00\x00\x00\x00\x00"
 			.pack('V', $crc32)
 			.pack('V', $compressed_size)
 			.pack('V', $uncompressed_size)
 			.pack('v', strlen($filepath)) // length of filename
 			.pack('v', 0) // extra field length
 			.$filepath
 			.$gzdata; // "file data" segment

 		$this->directory .=
 			"\x50\x4b\x01\x02\x00\x00\x14\x00\x00\x00\x08\x00\x00\x00\x00\x00"
 			.pack('V', $crc32)
 			.pack('V', $compressed_size)
 			.pack('V', $uncompressed_size)
 			.pack('v', strlen($filepath)) // length of filename
 			.pack('v', 0) // extra field length
 			.pack('v', 0) // file comment length
 			.pack('v', 0) // disk number start
 			.pack('v', 0) // internal file attributes
 			.pack('V', 32) // external file attributes - 'archive' bit set
 			.pack('V', $this->offset) // relative offset of local header
 			.$filepath;

 		$this->offset = strlen($this->zipdata);
 		$this->entries++;
 		$this->file_num++;
 	}

 	// --------------------------------------------------------------------

 	/**
 	 * Read the contents of a file and add it to the zip
 	 *
 	 * @access	public
 	 * @return	bool
 	 */
 	function read_file($path, $preserve_filepath = FALSE)
 	{
 		if ( ! file_exists($path))
 		{
 			return FALSE;
 		}

 		if (FALSE !== ($data = file_get_contents($path)))
 		{
 			$name = str_replace("\\", "/", $path);

 			if ($preserve_filepath === FALSE)
 			{
 				$name = preg_replace("|.*/(.+)|", "\\1", $name);
 			}

 			$this->add_data($name, $data);
 			return TRUE;
 		}
 		return FALSE;
 	}

 	// ------------------------------------------------------------------------

 	/**
 	 * Read a directory and add it to the zip.
 	 *
 	 * This function recursively reads a folder and everything it contains (including
 	 * sub-folders) and creates a zip based on it.  Whatever directory structure
 	 * is in the original file path will be recreated in the zip file.
 	 *
 	 * @access	public
 	 * @param	string	path to source
 	 * @return	bool
 	 */
 	function read_dir($path)
 	{
 		if ($fp = @opendir($path))
 		{
 			while (FALSE !== ($file = readdir($fp)))
 			{
 				if (@is_dir($path.$file) && substr($file, 0, 1) != '.')
 				{
 					$this->read_dir($path.$file."/");
 				}
 				elseif (substr($file, 0, 1) != ".")
 				{
 					if (FALSE !== ($data = file_get_contents($path.$file)))
 					{
 						$this->add_data(str_replace("\\", "/", $path).$file, $data);
 					}
 				}
 			}
 			return TRUE;
 		}
 	}

 	// --------------------------------------------------------------------

 	/**
 	 * Get the Zip file
 	 *
 	 * @access	public
 	 * @return	binary string
 	 */
 	function get_zip()
 	{
 		// Is there any data to return?
 		if ($this->entries == 0)
 		{
 			return FALSE;
 		}

 		$zip_data = $this->zipdata;
 		$zip_data .= $this->directory."\x50\x4b\x05\x06\x00\x00\x00\x00";
 		$zip_data .= pack('v', $this->entries); // total # of entries "on this disk"
 		$zip_data .= pack('v', $this->entries); // total # of entries overall
 		$zip_data .= pack('V', strlen($this->directory)); // size of central dir
 		$zip_data .= pack('V', strlen($this->zipdata)); // offset to start of central dir
 		$zip_data .= "\x00\x00"; // .zip file comment length

 		return $zip_data;
 	}

 	// --------------------------------------------------------------------

 	/**
 	 * Write File to the specified directory
 	 *
 	 * Lets you write a file
 	 *
 	 * @access	public
 	 * @param	string	the file name
 	 * @return	bool
 	 */
 	function archive($filepath)
 	{
 		if ( ! ($fp = @fopen($filepath, FOPEN_WRITE_CREATE_DESTRUCTIVE)))
 		{
 			return FALSE;
 		}

 		flock($fp, LOCK_EX);
 		fwrite($fp, $this->get_zip());
 		flock($fp, LOCK_UN);
 		fclose($fp);

 		return TRUE;
 	}

 	// --------------------------------------------------------------------

 	/**
 	 * Download
 	 *
 	 * @access	public
 	 * @param	string	the file name
 	 * @param	string	the data to be encoded
 	 * @return	bool
 	 */
 	function download($filename = 'backup.zip')
 	{
 		if ( ! preg_match("|.+?\.zip$|", $filename))
 		{
 			$filename .= '.zip';
 		}

 		$CI =& get_instance();
 		$CI->load->helper('download');

 		$get_zip = $this->get_zip();

 		$zip_content =& $get_zip;

 		force_download($filename, $zip_content);
 	}

 	// --------------------------------------------------------------------

 	/**
 	 * Initialize Data
 	 *
 	 * Lets you clear current zip data.  Useful if you need to create
 	 * multiple zips with different data.
 	 *
 	 * @access	public
 	 * @return	void
 	 */
 	function clear_data()
 	{
 		$this->zipdata		= '';
 		$this->directory	= '';
 		$this->entries		= 0;
 		$this->file_num		= 0;
 		$this->offset		= 0;
 	}

 }

 /* End of file Zip.php */
 /* Location: ./system/libraries/Zip.php */
	<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
	/**
	* CodeIgniter
	*
	* An open source application development framework for PHP 4.3.2 or newer
	*
	* @package CodeIgniter
	* @author ExpressionEngine Dev Team
	* @copyright Copyright (c) 2008 - 2010, EllisLab, Inc.
	* @license http://codeigniter.com/user_guide/license.html
	* @link http://codeigniter.com
	* @since Version 1.0
	* @filesource
	*/

	// ------------------------------------------------------------------------

	/**
	* Zip Compression Class
	*
	* This class is based on a library I found at Zend:
	* http://www.zend.com/codex.php?id=696&single=1
	*
	* The original library is a little rough around the edges so I
	* refactored it and added several additional methods -- Rick Ellis
	*
	* @package CodeIgniter
	* @subpackage Libraries
	* @category Encryption
	* @author ExpressionEngine Dev Team
	* @link http://codeigniter.com/user_guide/libraries/zip.html
	*/
	class CI_Zip {

	var $zipdata = '';
	var $directory = '';
	var $entries = 0;
	var $file_num = 0;
	var $offset = 0;

	function CI_Zip()
	{
	log_message('debug', "Zip Compression Class Initialized");
	}

	// --------------------------------------------------------------------

	/**
	* Add Directory
	*
	* Lets you add a virtual directory into which you can place files.
	*
	* @access public
	* @param mixed the directory name. Can be string or array
	* @return void
	*/
	function add_dir($directory)
	{
	foreach ((array)$directory as $dir)
	{
	if ( ! preg_match("\|.+/$\|", $dir))
	{
	$dir .= '/';
	}

	$this->_add_dir($dir);
	}
	}

	// --------------------------------------------------------------------

	/**
	* Add Directory
	*
	* @access private
	* @param string the directory name
	* @return void
	*/
	function _add_dir($dir)
	{
	$dir = str_replace("\\", "/", $dir);

	$this->zipdata .=
	"\x50\x4b\x03\x04\x0a\x00\x00\x00\x00\x00\x00\x00\x00\x00"
	.pack('V', 0) // crc32
	.pack('V', 0) // compressed filesize
	.pack('V', 0) // uncompressed filesize
	.pack('v', strlen($dir)) // length of pathname
	.pack('v', 0) // extra field length
	.$dir
	// below is "data descriptor" segment
	.pack('V', 0) // crc32
	.pack('V', 0) // compressed filesize
	.pack('V', 0); // uncompressed filesize

	$this->directory .=
	"\x50\x4b\x01\x02\x00\x00\x0a\x00\x00\x00\x00\x00\x00\x00\x00\x00"
	.pack('V',0) // crc32
	.pack('V',0) // compressed filesize
	.pack('V',0) // uncompressed filesize
	.pack('v', strlen($dir)) // length of pathname
	.pack('v', 0) // extra field length
	.pack('v', 0) // file comment length
	.pack('v', 0) // disk number start
	.pack('v', 0) // internal file attributes
	.pack('V', 16) // external file attributes - 'directory' bit set
	.pack('V', $this->offset) // relative offset of local header
	.$dir;

	$this->offset = strlen($this->zipdata);
	$this->entries++;
	}

	// --------------------------------------------------------------------

	/**
	* Add Data to Zip
	*
	* Lets you add files to the archive. If the path is included
	* in the filename it will be placed within a directory. Make
	* sure you use add_dir() first to create the folder.
	*
	* @access public
	* @param mixed
	* @param string
	* @return void
	*/
	function add_data($filepath, $data = NULL)
	{
	if (is_array($filepath))
	{
	foreach ($filepath as $path => $data)
	{
	$this->_add_data($path, $data);
	}
	}
	else
	{
	$this->_add_data($filepath, $data);
	}
	}

	// --------------------------------------------------------------------

	/**
	* Add Data to Zip
	*
	* @access private
	* @param string the file name/path
	* @param string the data to be encoded
	* @return void
	*/
	function _add_data($filepath, $data)
	{
	$filepath = str_replace("\\", "/", $filepath);

	$uncompressed_size = strlen($data);
	$crc32 = crc32($data);

	$gzdata = gzcompress($data);
	$gzdata = substr($gzdata, 2, -4);
	$compressed_size = strlen($gzdata);

	$this->zipdata .=
	"\x50\x4b\x03\x04\x14\x00\x00\x00\x08\x00\x00\x00\x00\x00"
	.pack('V', $crc32)
	.pack('V', $compressed_size)
	.pack('V', $uncompressed_size)
	.pack('v', strlen($filepath)) // length of filename
	.pack('v', 0) // extra field length
	.$filepath
	.$gzdata; // "file data" segment

	$this->directory .=
	"\x50\x4b\x01\x02\x00\x00\x14\x00\x00\x00\x08\x00\x00\x00\x00\x00"
	.pack('V', $crc32)
	.pack('V', $compressed_size)
	.pack('V', $uncompressed_size)
	.pack('v', strlen($filepath)) // length of filename
	.pack('v', 0) // extra field length
	.pack('v', 0) // file comment length
	.pack('v', 0) // disk number start
	.pack('v', 0) // internal file attributes
	.pack('V', 32) // external file attributes - 'archive' bit set
	.pack('V', $this->offset) // relative offset of local header
	.$filepath;

	$this->offset = strlen($this->zipdata);
	$this->entries++;
	$this->file_num++;
	}

	// --------------------------------------------------------------------

	/**
	* Read the contents of a file and add it to the zip
	*
	* @access public
	* @return bool
	*/
	function read_file($path, $preserve_filepath = FALSE)
	{
	if ( ! file_exists($path))
	{
	return FALSE;
	}

	if (FALSE !== ($data = file_get_contents($path)))
	{
	$name = str_replace("\\", "/", $path);

	if ($preserve_filepath === FALSE)
	{
	$name = preg_replace("\|.*/(.+)\|", "\\1", $name);
	}

	$this->add_data($name, $data);
	return TRUE;
	}
	return FALSE;
	}

	// ------------------------------------------------------------------------

	/**
	* Read a directory and add it to the zip.
	*
	* This function recursively reads a folder and everything it contains (including
	* sub-folders) and creates a zip based on it. Whatever directory structure
	* is in the original file path will be recreated in the zip file.
	*
	* @access public
	* @param string path to source
	* @return bool
	*/
	function read_dir($path)
	{
	if ($fp = @opendir($path))
	{
	while (FALSE !== ($file = readdir($fp)))
	{
	if (@is_dir($path.$file) && substr($file, 0, 1) != '.')
	{
	$this->read_dir($path.$file."/");
	}
	elseif (substr($file, 0, 1) != ".")
	{
	if (FALSE !== ($data = file_get_contents($path.$file)))
	{
	$this->add_data(str_replace("\\", "/", $path).$file, $data);
	}
	}
	}
	return TRUE;
	}
	}

	// --------------------------------------------------------------------

	/**
	* Get the Zip file
	*
	* @access public
	* @return binary string
	*/
	function get_zip()
	{
	// Is there any data to return?
	if ($this->entries == 0)
	{
	return FALSE;
	}

	$zip_data = $this->zipdata;
	$zip_data .= $this->directory."\x50\x4b\x05\x06\x00\x00\x00\x00";
	$zip_data .= pack('v', $this->entries); // total # of entries "on this disk"
	$zip_data .= pack('v', $this->entries); // total # of entries overall
	$zip_data .= pack('V', strlen($this->directory)); // size of central dir
	$zip_data .= pack('V', strlen($this->zipdata)); // offset to start of central dir
	$zip_data .= "\x00\x00"; // .zip file comment length

	return $zip_data;
	}

	// --------------------------------------------------------------------

	/**
	* Write File to the specified directory
	*
	* Lets you write a file
	*
	* @access public
	* @param string the file name
	* @return bool
	*/
	function archive($filepath)
	{
	if ( ! ($fp = @fopen($filepath, FOPEN_WRITE_CREATE_DESTRUCTIVE)))
	{
	return FALSE;
	}

	flock($fp, LOCK_EX);
	fwrite($fp, $this->get_zip());
	flock($fp, LOCK_UN);
	fclose($fp);

	return TRUE;
	}

	// --------------------------------------------------------------------

	/**
	* Download
	*
	* @access public
	* @param string the file name
	* @param string the data to be encoded
	* @return bool
	*/
	function download($filename = 'backup.zip')
	{
	if ( ! preg_match("\|.+?\.zip$\|", $filename))
	{
	$filename .= '.zip';
	}

	$CI =& get_instance();
	$CI->load->helper('download');

	$get_zip = $this->get_zip();

	$zip_content =& $get_zip;

	force_download($filename, $zip_content);
	}

	// --------------------------------------------------------------------

	/**
	* Initialize Data
	*
	* Lets you clear current zip data. Useful if you need to create
	* multiple zips with different data.
	*
	* @access public
	* @return void
	*/
	function clear_data()
	{
	$this->zipdata = '';
	$this->directory = '';
	$this->entries = 0;
	$this->file_num = 0;
	$this->offset = 0;
	}

	}

	/* End of file Zip.php */
	/* Location: ./system/libraries/Zip.php */