Revision 2254 | Zur aktuellen Revision | Blame | Vergleich mit vorheriger | Letzte Änderung | Log anzeigen | RSS feed
<?php/*** CodeIgniter** An open source application development framework for PHP** This content is released under the MIT License (MIT)** Copyright (c) 2014 - 2018, British Columbia Institute of Technology** Permission is hereby granted, free of charge, to any person obtaining a copy* of this software and associated documentation files (the "Software"), to deal* in the Software without restriction, including without limitation the rights* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell* copies of the Software, and to permit persons to whom the Software is* furnished to do so, subject to the following conditions:** The above copyright notice and this permission notice shall be included in* all copies or substantial portions of the Software.** THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN* THE SOFTWARE.** @package CodeIgniter* @author EllisLab Dev Team* @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/)* @copyright Copyright (c) 2014 - 2018, British Columbia Institute of Technology (http://bcit.ca/)* @license http://opensource.org/licenses/MIT MIT License* @link https://codeigniter.com* @since Version 1.0.0* @filesource*/defined('BASEPATH') OR exit('No direct script access allowed');/*** 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 https://codeigniter.com/user_guide/libraries/zip.html*/class CI_Zip {/*** Zip data in string form** @var string*/public $zipdata = '';/*** Zip data for a directory in string form** @var string*/public $directory = '';/*** Number of files/folder in zip file** @var int*/public $entries = 0;/*** Number of files in zip** @var int*/public $file_num = 0;/*** relative offset of local header** @var int*/public $offset = 0;/*** Reference to time at init** @var int*/public $now;/*** The level of compression** Ranges from 0 to 9, with 9 being the highest level.** @var int*/public $compression_level = 2;/*** mbstring.func_overload flag** @var bool*/protected static $func_overload;/*** Initialize zip compression class** @return void*/public function __construct(){isset(self::$func_overload) OR self::$func_overload = (extension_loaded('mbstring') && ini_get('mbstring.func_overload'));$this->now = time();log_message('info', 'Zip Compression Class Initialized');}// --------------------------------------------------------------------/*** Add Directory** Lets you add a virtual directory into which you can place files.** @param mixed $directory the directory name. Can be string or array* @return void*/public function add_dir($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 $dir path to file* @return array filemtime/filemdate*/protected function _get_mod_time($dir){// filemtime() may return false, but raises an error for non-existing files$date = file_exists($dir) ? getdate(filemtime($dir)) : getdate($this->now);return array('file_mtime' => ($date['hours'] << 11) + ($date['minutes'] << 5) + $date['seconds'] / 2,'file_mdate' => (($date['year'] - 1980) << 9) + ($date['mon'] << 5) + $date['mday']);}// --------------------------------------------------------------------/*** Add Directory** @param string $dir the directory name* @param int $file_mtime* @param int $file_mdate* @return void*/protected function _add_dir($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', $file_mdate).pack('V', 0) // crc32.pack('V', 0) // compressed filesize.pack('V', 0) // uncompressed filesize.pack('v', self::strlen($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', $file_mdate).pack('V',0) // crc32.pack('V',0) // compressed filesize.pack('V',0) // uncompressed filesize.pack('v', self::strlen($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;$this->offset = self::strlen($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.** @param mixed $filepath A single filepath or an array of file => data pairs* @param string $data Single file contents* @return void*/public function add_data($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** @param string $filepath the file name/path* @param string $data the data to be encoded* @param int $file_mtime* @param int $file_mdate* @return void*/protected function _add_data($filepath, $data, $file_mtime, $file_mdate){$filepath = str_replace('\\', '/', $filepath);$uncompressed_size = self::strlen($data);$crc32 = crc32($data);$gzdata = self::substr(gzcompress($data, $this->compression_level), 2, -4);$compressed_size = self::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', $uncompressed_size).pack('v', self::strlen($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', $uncompressed_size).pack('v', self::strlen($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;$this->offset = self::strlen($this->zipdata);$this->entries++;$this->file_num++;}// --------------------------------------------------------------------/*** Read the contents of a file and add it to the zip** @param string $path* @param bool $archive_filepath* @return bool*/public function read_file($path, $archive_filepath = FALSE){if (file_exists($path) && FALSE !== ($data = file_get_contents($path))){if (is_string($archive_filepath)){$name = str_replace('\\', '/', $archive_filepath);}else{$name = str_replace('\\', '/', $path);if ($archive_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.** @param string $path path to source directory* @param bool $preserve_filepath* @param string $root_path* @return bool*/public function read_dir($path, $preserve_filepath = TRUE, $root_path = NULL){$path = rtrim($path, '/\\').DIRECTORY_SEPARATOR;if ( ! $fp = @opendir($path)){return FALSE;}// Set the original directory root for child dir's to use as relativeif ($root_path === NULL){$root_path = str_replace(array('\\', '/'), DIRECTORY_SEPARATOR, dirname($path)).DIRECTORY_SEPARATOR;}while (FALSE !== ($file = readdir($fp))){if ($file[0] === '.'){continue;}if (is_dir($path.$file)){$this->read_dir($path.$file.DIRECTORY_SEPARATOR, $preserve_filepath, $root_path);}elseif (FALSE !== ($data = file_get_contents($path.$file))){$name = str_replace(array('\\', '/'), DIRECTORY_SEPARATOR, $path);if ($preserve_filepath === FALSE){$name = str_replace($root_path, '', $name);}$this->add_data($name.$file, $data);}}closedir($fp);return TRUE;}// --------------------------------------------------------------------/*** Get the Zip file** @return string (binary encoded)*/public function get_zip(){// Is there any data to return?if ($this->entries === 0){return FALSE;}return $this->zipdata.$this->directory."\x50\x4b\x05\x06\x00\x00\x00\x00".pack('v', $this->entries) // total # of entries "on this disk".pack('v', $this->entries) // total # of entries overall.pack('V', self::strlen($this->directory)) // size of central dir.pack('V', self::strlen($this->zipdata)) // offset to start of central dir."\x00\x00"; // .zip file comment length}// --------------------------------------------------------------------/*** Write File to the specified directory** Lets you write a file** @param string $filepath the file name* @return bool*/public function archive($filepath){if ( ! ($fp = @fopen($filepath, 'w+b'))){return FALSE;}flock($fp, LOCK_EX);for ($result = $written = 0, $data = $this->get_zip(), $length = self::strlen($data); $written < $length; $written += $result){if (($result = fwrite($fp, self::substr($data, $written))) === FALSE){break;}}flock($fp, LOCK_UN);fclose($fp);return is_int($result);}// --------------------------------------------------------------------/*** Download** @param string $filename the file name* @return void*/public function download($filename = 'backup.zip'){if ( ! preg_match('|.+?\.zip$|', $filename)){$filename .= '.zip';}get_instance()->load->helper('download');$get_zip = $this->get_zip();$zip_content =& $get_zip;force_download($filename, $zip_content);}// --------------------------------------------------------------------/*** Initialize Data** Lets you clear current zip data. Useful if you need to create* multiple zips with different data.** @return CI_Zip*/public function clear_data(){$this->zipdata = '';$this->directory = '';$this->entries = 0;$this->file_num = 0;$this->offset = 0;return $this;}// --------------------------------------------------------------------/*** Byte-safe strlen()** @param string $str* @return int*/protected static function strlen($str){return (self::$func_overload)? mb_strlen($str, '8bit'): strlen($str);}// --------------------------------------------------------------------/*** Byte-safe substr()** @param string $str* @param int $start* @param int $length* @return string*/protected static function substr($str, $start, $length = NULL){if (self::$func_overload){// mb_substr($str, $start, null, '8bit') returns an empty// string on PHP 5.3isset($length) OR $length = ($start >= 0 ? self::strlen($str) - $start : -$start);return mb_substr($str, $start, $length, '8bit');}return isset($length)? substr($str, $start, $length): substr($str, $start);}}