/system/codeigniter/system/libraries/Zip.php
PHP | 423 lines | 221 code | 60 blank | 142 comment | 18 complexity | 7227e78c6fdba61454e0110753340ae7 MD5 | raw file
- <?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
- /**
- * CodeIgniter
- *
- * An open source application development framework for PHP 5.2.4 or newer
- *
- * @package CodeIgniter
- * @author EllisLab Dev Team
- * @copyright Copyright (c) 2008 - 2013, 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 EllisLab 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;
- var $now;
- /**
- * Constructor
- */
- public function __construct()
- {
- log_message('debug', "Zip Compression Class Initialized");
- $this->now = time();
- }
- // --------------------------------------------------------------------
- /**
- * Add Directory
- *
- * Lets you add a virtual directory into which you can place files.
- *
- * @access public
- * @param mixed the directory name. Can be string or array
- * @return void
- */
- function add_dir($directory)
- {
- foreach ((array)$directory as $dir)
- {
- if ( ! preg_match("|.+/$|", $dir))
- {
- $dir .= '/';
- }
- $dir_time = $this->_get_mod_time($dir);
- $this->_add_dir($dir, $dir_time['file_mtime'], $dir_time['file_mdate']);
- }
- }
- // --------------------------------------------------------------------
- /**
- * Get file/directory modification time
- *
- * If this is a newly created file/dir, we will set the time to 'now'
- *
- * @param string path to file
- * @return array filemtime/filemdate
- */
- function _get_mod_time($dir)
- {
- // filemtime() will return false, but it does raise an error.
- $date = (@filemtime($dir)) ? filemtime($dir) : getdate($this->now);
- $time['file_mtime'] = ($date['hours'] << 11) + ($date['minutes'] << 5) + $date['seconds'] / 2;
- $time['file_mdate'] = (($date['year'] - 1980) << 9) + ($date['mon'] << 5) + $date['mday'];
- return $time;
- }
- // --------------------------------------------------------------------
- /**
- * Add Directory
- *
- * @access private
- * @param string the directory name
- * @return void
- */
- function _add_dir($dir, $file_mtime, $file_mdate)
- {
- $dir = str_replace("\\", "/", $dir);
- $this->zipdata .=
- "\x50\x4b\x03\x04\x0a\x00\x00\x00\x00\x00"
- .pack('v', $file_mtime)
- .pack('v', $file_mdate)
- .pack('V', 0) // crc32
- .pack('V', 0) // compressed filesize
- .pack('V', 0) // uncompressed filesize
- .pack('v', strlen($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"
- .pack('v', $file_mtime)
- .pack('v', $file_mdate)
- .pack('V',0) // crc32
- .pack('V',0) // compressed filesize
- .pack('V',0) // uncompressed filesize
- .pack('v', strlen($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)
- {
- $file_data = $this->_get_mod_time($path);
- $this->_add_data($path, $data, $file_data['file_mtime'], $file_data['file_mdate']);
- }
- }
- else
- {
- $file_data = $this->_get_mod_time($filepath);
- $this->_add_data($filepath, $data, $file_data['file_mtime'], $file_data['file_mdate']);
- }
- }
- // --------------------------------------------------------------------
- /**
- * Add Data to Zip
- *
- * @access private
- * @param string the file name/path
- * @param string the data to be encoded
- * @return void
- */
- function _add_data($filepath, $data, $file_mtime, $file_mdate)
- {
- $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"
- .pack('v', $file_mtime)
- .pack('v', $file_mdate)
- .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"
- .pack('v', $file_mtime)
- .pack('v', $file_mdate)
- .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, $preserve_filepath = TRUE, $root_path = NULL)
- {
- if ( ! $fp = @opendir($path))
- {
- return FALSE;
- }
- // Set the original directory root for child dir's to use as relative
- if ($root_path === NULL)
- {
- $root_path = dirname($path).'/';
- }
- while (FALSE !== ($file = readdir($fp)))
- {
- if(substr($file, 0, 1) == '.')
- {
- continue;
- }
- if (@is_dir($path.$file))
- {
- $this->read_dir($path.$file."/", $preserve_filepath, $root_path);
- }
- else
- {
- if (FALSE !== ($data = file_get_contents($path.$file)))
- {
- $name = str_replace("\\", "/", $path);
- if ($preserve_filepath === FALSE)
- {
- $name = str_replace($root_path, '', $name);
- }
- $this->add_data($name.$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 */