[1] | 1 | <?php if ( ! defined('BASEPATH')) exit('No direct script access allowed'); |
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| 2 | /** |
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| 3 | * CodeIgniter |
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| 4 | * |
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| 5 | * An open source application development framework for PHP 5.1.6 or newer |
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| 6 | * |
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| 7 | * @package CodeIgniter |
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| 8 | * @author ExpressionEngine Dev Team |
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| 9 | * @copyright Copyright (c) 2008 - 2011, EllisLab, Inc. |
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| 10 | * @license http://codeigniter.com/user_guide/license.html |
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| 11 | * @link http://codeigniter.com |
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| 12 | * @since Version 1.0 |
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| 13 | * @filesource |
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| 14 | */ |
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| 15 | |
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| 16 | // ------------------------------------------------------------------------ |
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| 17 | |
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| 18 | /** |
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| 19 | * Zip Compression Class |
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| 20 | * |
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| 21 | * This class is based on a library I found at Zend: |
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| 22 | * http://www.zend.com/codex.php?id=696&single=1 |
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| 23 | * |
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| 24 | * The original library is a little rough around the edges so I |
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| 25 | * refactored it and added several additional methods -- Rick Ellis |
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| 26 | * |
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| 27 | * @package CodeIgniter |
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| 28 | * @subpackage Libraries |
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| 29 | * @category Encryption |
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| 30 | * @author ExpressionEngine Dev Team |
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| 31 | * @link http://codeigniter.com/user_guide/libraries/zip.html |
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| 32 | */ |
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| 33 | class CI_Zip { |
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| 34 | |
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| 35 | var $zipdata = ''; |
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| 36 | var $directory = ''; |
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| 37 | var $entries = 0; |
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| 38 | var $file_num = 0; |
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| 39 | var $offset = 0; |
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| 40 | var $now; |
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| 41 | |
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| 42 | /** |
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| 43 | * Constructor |
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| 44 | */ |
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| 45 | public function __construct() |
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| 46 | { |
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| 47 | log_message('debug', "Zip Compression Class Initialized"); |
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| 48 | |
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| 49 | $this->now = time(); |
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| 50 | } |
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| 51 | |
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| 52 | // -------------------------------------------------------------------- |
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| 53 | |
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| 54 | /** |
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| 55 | * Add Directory |
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| 56 | * |
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| 57 | * Lets you add a virtual directory into which you can place files. |
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| 58 | * |
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| 59 | * @access public |
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| 60 | * @param mixed the directory name. Can be string or array |
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| 61 | * @return void |
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| 62 | */ |
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| 63 | function add_dir($directory) |
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| 64 | { |
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| 65 | foreach ((array)$directory as $dir) |
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| 66 | { |
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| 67 | if ( ! preg_match("|.+/$|", $dir)) |
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| 68 | { |
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| 69 | $dir .= '/'; |
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| 70 | } |
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| 71 | |
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| 72 | $dir_time = $this->_get_mod_time($dir); |
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| 73 | |
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| 74 | $this->_add_dir($dir, $dir_time['file_mtime'], $dir_time['file_mdate']); |
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| 75 | } |
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| 76 | } |
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| 77 | |
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| 78 | // -------------------------------------------------------------------- |
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| 79 | |
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| 80 | /** |
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| 81 | * Get file/directory modification time |
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| 82 | * |
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| 83 | * If this is a newly created file/dir, we will set the time to 'now' |
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| 84 | * |
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| 85 | * @param string path to file |
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| 86 | * @return array filemtime/filemdate |
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| 87 | */ |
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| 88 | function _get_mod_time($dir) |
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| 89 | { |
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| 90 | // filemtime() will return false, but it does raise an error. |
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| 91 | $date = (@filemtime($dir)) ? filemtime($dir) : getdate($this->now); |
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| 92 | |
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| 93 | $time['file_mtime'] = ($date['hours'] << 11) + ($date['minutes'] << 5) + $date['seconds'] / 2; |
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| 94 | $time['file_mdate'] = (($date['year'] - 1980) << 9) + ($date['mon'] << 5) + $date['mday']; |
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| 95 | |
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| 96 | return $time; |
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| 97 | } |
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| 98 | |
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| 99 | // -------------------------------------------------------------------- |
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| 100 | |
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| 101 | /** |
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| 102 | * Add Directory |
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| 103 | * |
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| 104 | * @access private |
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| 105 | * @param string the directory name |
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| 106 | * @return void |
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| 107 | */ |
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| 108 | function _add_dir($dir, $file_mtime, $file_mdate) |
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| 109 | { |
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| 110 | $dir = str_replace("\\", "/", $dir); |
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| 111 | |
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| 112 | $this->zipdata .= |
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| 113 | "\x50\x4b\x03\x04\x0a\x00\x00\x00\x00\x00" |
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| 114 | .pack('v', $file_mtime) |
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| 115 | .pack('v', $file_mdate) |
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| 116 | .pack('V', 0) // crc32 |
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| 117 | .pack('V', 0) // compressed filesize |
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| 118 | .pack('V', 0) // uncompressed filesize |
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| 119 | .pack('v', strlen($dir)) // length of pathname |
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| 120 | .pack('v', 0) // extra field length |
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| 121 | .$dir |
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| 122 | // below is "data descriptor" segment |
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| 123 | .pack('V', 0) // crc32 |
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| 124 | .pack('V', 0) // compressed filesize |
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| 125 | .pack('V', 0); // uncompressed filesize |
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| 126 | |
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| 127 | $this->directory .= |
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| 128 | "\x50\x4b\x01\x02\x00\x00\x0a\x00\x00\x00\x00\x00" |
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| 129 | .pack('v', $file_mtime) |
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| 130 | .pack('v', $file_mdate) |
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| 131 | .pack('V',0) // crc32 |
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| 132 | .pack('V',0) // compressed filesize |
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| 133 | .pack('V',0) // uncompressed filesize |
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| 134 | .pack('v', strlen($dir)) // length of pathname |
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| 135 | .pack('v', 0) // extra field length |
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| 136 | .pack('v', 0) // file comment length |
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| 137 | .pack('v', 0) // disk number start |
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| 138 | .pack('v', 0) // internal file attributes |
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| 139 | .pack('V', 16) // external file attributes - 'directory' bit set |
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| 140 | .pack('V', $this->offset) // relative offset of local header |
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| 141 | .$dir; |
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| 142 | |
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| 143 | $this->offset = strlen($this->zipdata); |
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| 144 | $this->entries++; |
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| 145 | } |
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| 146 | |
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| 147 | // -------------------------------------------------------------------- |
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| 148 | |
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| 149 | /** |
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| 150 | * Add Data to Zip |
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| 151 | * |
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| 152 | * Lets you add files to the archive. If the path is included |
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| 153 | * in the filename it will be placed within a directory. Make |
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| 154 | * sure you use add_dir() first to create the folder. |
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| 155 | * |
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| 156 | * @access public |
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| 157 | * @param mixed |
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| 158 | * @param string |
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| 159 | * @return void |
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| 160 | */ |
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| 161 | function add_data($filepath, $data = NULL) |
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| 162 | { |
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| 163 | if (is_array($filepath)) |
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| 164 | { |
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| 165 | foreach ($filepath as $path => $data) |
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| 166 | { |
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| 167 | $file_data = $this->_get_mod_time($path); |
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| 168 | |
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| 169 | $this->_add_data($path, $data, $file_data['file_mtime'], $file_data['file_mdate']); |
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| 170 | } |
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| 171 | } |
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| 172 | else |
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| 173 | { |
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| 174 | $file_data = $this->_get_mod_time($filepath); |
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| 175 | |
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| 176 | $this->_add_data($filepath, $data, $file_data['file_mtime'], $file_data['file_mdate']); |
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| 177 | } |
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| 178 | } |
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| 179 | |
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| 180 | // -------------------------------------------------------------------- |
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| 181 | |
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| 182 | /** |
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| 183 | * Add Data to Zip |
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| 184 | * |
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| 185 | * @access private |
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| 186 | * @param string the file name/path |
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| 187 | * @param string the data to be encoded |
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| 188 | * @return void |
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| 189 | */ |
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| 190 | function _add_data($filepath, $data, $file_mtime, $file_mdate) |
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| 191 | { |
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| 192 | $filepath = str_replace("\\", "/", $filepath); |
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| 193 | |
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| 194 | $uncompressed_size = strlen($data); |
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| 195 | $crc32 = crc32($data); |
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| 196 | |
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| 197 | $gzdata = gzcompress($data); |
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| 198 | $gzdata = substr($gzdata, 2, -4); |
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| 199 | $compressed_size = strlen($gzdata); |
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| 200 | |
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| 201 | $this->zipdata .= |
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| 202 | "\x50\x4b\x03\x04\x14\x00\x00\x00\x08\x00" |
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| 203 | .pack('v', $file_mtime) |
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| 204 | .pack('v', $file_mdate) |
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| 205 | .pack('V', $crc32) |
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| 206 | .pack('V', $compressed_size) |
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| 207 | .pack('V', $uncompressed_size) |
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| 208 | .pack('v', strlen($filepath)) // length of filename |
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| 209 | .pack('v', 0) // extra field length |
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| 210 | .$filepath |
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| 211 | .$gzdata; // "file data" segment |
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| 212 | |
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| 213 | $this->directory .= |
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| 214 | "\x50\x4b\x01\x02\x00\x00\x14\x00\x00\x00\x08\x00" |
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| 215 | .pack('v', $file_mtime) |
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| 216 | .pack('v', $file_mdate) |
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| 217 | .pack('V', $crc32) |
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| 218 | .pack('V', $compressed_size) |
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| 219 | .pack('V', $uncompressed_size) |
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| 220 | .pack('v', strlen($filepath)) // length of filename |
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| 221 | .pack('v', 0) // extra field length |
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| 222 | .pack('v', 0) // file comment length |
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| 223 | .pack('v', 0) // disk number start |
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| 224 | .pack('v', 0) // internal file attributes |
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| 225 | .pack('V', 32) // external file attributes - 'archive' bit set |
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| 226 | .pack('V', $this->offset) // relative offset of local header |
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| 227 | .$filepath; |
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| 228 | |
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| 229 | $this->offset = strlen($this->zipdata); |
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| 230 | $this->entries++; |
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| 231 | $this->file_num++; |
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| 232 | } |
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| 233 | |
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| 234 | // -------------------------------------------------------------------- |
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| 235 | |
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| 236 | /** |
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| 237 | * Read the contents of a file and add it to the zip |
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| 238 | * |
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| 239 | * @access public |
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| 240 | * @return bool |
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| 241 | */ |
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| 242 | function read_file($path, $preserve_filepath = FALSE) |
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| 243 | { |
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| 244 | if ( ! file_exists($path)) |
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| 245 | { |
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| 246 | return FALSE; |
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| 247 | } |
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| 248 | |
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| 249 | if (FALSE !== ($data = file_get_contents($path))) |
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| 250 | { |
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| 251 | $name = str_replace("\\", "/", $path); |
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| 252 | |
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| 253 | if ($preserve_filepath === FALSE) |
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| 254 | { |
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| 255 | $name = preg_replace("|.*/(.+)|", "\\1", $name); |
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| 256 | } |
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| 257 | |
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| 258 | $this->add_data($name, $data); |
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| 259 | return TRUE; |
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| 260 | } |
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| 261 | return FALSE; |
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| 262 | } |
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| 263 | |
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| 264 | // ------------------------------------------------------------------------ |
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| 265 | |
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| 266 | /** |
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| 267 | * Read a directory and add it to the zip. |
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| 268 | * |
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| 269 | * This function recursively reads a folder and everything it contains (including |
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| 270 | * sub-folders) and creates a zip based on it. Whatever directory structure |
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| 271 | * is in the original file path will be recreated in the zip file. |
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| 272 | * |
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| 273 | * @access public |
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| 274 | * @param string path to source |
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| 275 | * @return bool |
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| 276 | */ |
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| 277 | function read_dir($path, $preserve_filepath = TRUE, $root_path = NULL) |
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| 278 | { |
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| 279 | if ( ! $fp = @opendir($path)) |
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| 280 | { |
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| 281 | return FALSE; |
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| 282 | } |
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| 283 | |
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| 284 | // Set the original directory root for child dir's to use as relative |
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| 285 | if ($root_path === NULL) |
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| 286 | { |
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| 287 | $root_path = dirname($path).'/'; |
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| 288 | } |
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| 289 | |
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| 290 | while (FALSE !== ($file = readdir($fp))) |
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| 291 | { |
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| 292 | if (substr($file, 0, 1) == '.') |
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| 293 | { |
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| 294 | continue; |
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| 295 | } |
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| 296 | |
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| 297 | if (@is_dir($path.$file)) |
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| 298 | { |
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| 299 | $this->read_dir($path.$file."/", $preserve_filepath, $root_path); |
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| 300 | } |
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| 301 | else |
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| 302 | { |
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| 303 | if (FALSE !== ($data = file_get_contents($path.$file))) |
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| 304 | { |
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| 305 | $name = str_replace("\\", "/", $path); |
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| 306 | |
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| 307 | if ($preserve_filepath === FALSE) |
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| 308 | { |
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| 309 | $name = str_replace($root_path, '', $name); |
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| 310 | } |
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| 311 | |
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| 312 | $this->add_data($name.$file, $data); |
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| 313 | } |
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| 314 | } |
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| 315 | } |
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| 316 | |
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| 317 | return TRUE; |
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| 318 | } |
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| 319 | |
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| 320 | // -------------------------------------------------------------------- |
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| 321 | |
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| 322 | /** |
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| 323 | * Get the Zip file |
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| 324 | * |
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| 325 | * @access public |
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| 326 | * @return binary string |
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| 327 | */ |
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| 328 | function get_zip() |
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| 329 | { |
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| 330 | // Is there any data to return? |
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| 331 | if ($this->entries == 0) |
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| 332 | { |
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| 333 | return FALSE; |
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| 334 | } |
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| 335 | |
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| 336 | $zip_data = $this->zipdata; |
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| 337 | $zip_data .= $this->directory."\x50\x4b\x05\x06\x00\x00\x00\x00"; |
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| 338 | $zip_data .= pack('v', $this->entries); // total # of entries "on this disk" |
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| 339 | $zip_data .= pack('v', $this->entries); // total # of entries overall |
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| 340 | $zip_data .= pack('V', strlen($this->directory)); // size of central dir |
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| 341 | $zip_data .= pack('V', strlen($this->zipdata)); // offset to start of central dir |
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| 342 | $zip_data .= "\x00\x00"; // .zip file comment length |
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| 343 | |
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| 344 | return $zip_data; |
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| 345 | } |
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| 346 | |
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| 347 | // -------------------------------------------------------------------- |
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| 348 | |
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| 349 | /** |
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| 350 | * Write File to the specified directory |
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| 351 | * |
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| 352 | * Lets you write a file |
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| 353 | * |
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| 354 | * @access public |
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| 355 | * @param string the file name |
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| 356 | * @return bool |
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| 357 | */ |
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| 358 | function archive($filepath) |
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| 359 | { |
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| 360 | if ( ! ($fp = @fopen($filepath, FOPEN_WRITE_CREATE_DESTRUCTIVE))) |
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| 361 | { |
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| 362 | return FALSE; |
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| 363 | } |
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| 364 | |
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| 365 | flock($fp, LOCK_EX); |
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| 366 | fwrite($fp, $this->get_zip()); |
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| 367 | flock($fp, LOCK_UN); |
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| 368 | fclose($fp); |
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| 369 | |
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| 370 | return TRUE; |
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| 371 | } |
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| 372 | |
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| 373 | // -------------------------------------------------------------------- |
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| 374 | |
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| 375 | /** |
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| 376 | * Download |
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| 377 | * |
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| 378 | * @access public |
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| 379 | * @param string the file name |
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| 380 | * @param string the data to be encoded |
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| 381 | * @return bool |
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| 382 | */ |
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| 383 | function download($filename = 'backup.zip') |
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| 384 | { |
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| 385 | if ( ! preg_match("|.+?\.zip$|", $filename)) |
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| 386 | { |
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| 387 | $filename .= '.zip'; |
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| 388 | } |
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| 389 | |
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| 390 | $CI =& get_instance(); |
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| 391 | $CI->load->helper('download'); |
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| 392 | |
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| 393 | $get_zip = $this->get_zip(); |
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| 394 | |
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| 395 | $zip_content =& $get_zip; |
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| 396 | |
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| 397 | force_download($filename, $zip_content); |
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| 398 | } |
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| 399 | |
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| 400 | // -------------------------------------------------------------------- |
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| 401 | |
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| 402 | /** |
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| 403 | * Initialize Data |
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| 404 | * |
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| 405 | * Lets you clear current zip data. Useful if you need to create |
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| 406 | * multiple zips with different data. |
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| 407 | * |
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| 408 | * @access public |
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| 409 | * @return void |
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| 410 | */ |
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| 411 | function clear_data() |
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| 412 | { |
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| 413 | $this->zipdata = ''; |
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| 414 | $this->directory = ''; |
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| 415 | $this->entries = 0; |
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| 416 | $this->file_num = 0; |
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| 417 | $this->offset = 0; |
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| 418 | } |
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| 419 | |
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| 420 | } |
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| 421 | |
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| 422 | /* End of file Zip.php */ |
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| 423 | /* Location: ./system/libraries/Zip.php */ |
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