1
<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
5
* An open source application development framework for PHP 5.1.6 or newer
8
* @author ExpressionEngine Dev Team
9
* @copyright Copyright (c) 2008 - 2011, EllisLab, Inc.
10
* @license http://codeigniter.com/user_guide/license.html
11
* @link http://codeigniter.com
16
// ------------------------------------------------------------------------
19
* Zip Compression Class
21
* This class is based on a library I found at Zend:
22
* http://www.zend.com/codex.php?id=696&single=1
24
* The original library is a little rough around the edges so I
25
* refactored it and added several additional methods -- Rick Ellis
27
* @package CodeIgniter
28
* @subpackage Libraries
29
* @category Encryption
30
* @author ExpressionEngine Dev Team
31
* @link http://codeigniter.com/user_guide/libraries/zip.html
45
public function __construct()
47
log_message('debug', "Zip Compression Class Initialized");
52
// --------------------------------------------------------------------
57
* Lets you add a virtual directory into which you can place files.
60
* @param mixed the directory name. Can be string or array
63
function add_dir($directory)
65
foreach ((array)$directory as $dir)
67
if ( ! preg_match("|.+/$|", $dir))
72
$dir_time = $this->_get_mod_time($dir);
74
$this->_add_dir($dir, $dir_time['file_mtime'], $dir_time['file_mdate']);
78
// --------------------------------------------------------------------
81
* Get file/directory modification time
83
* If this is a newly created file/dir, we will set the time to 'now'
85
* @param string path to file
86
* @return array filemtime/filemdate
88
function _get_mod_time($dir)
90
// filemtime() will return false, but it does raise an error.
91
$date = (@filemtime($dir)) ? filemtime($dir) : getdate($this->now);
93
$time['file_mtime'] = ($date['hours'] << 11) + ($date['minutes'] << 5) + $date['seconds'] / 2;
94
$time['file_mdate'] = (($date['year'] - 1980) << 9) + ($date['mon'] << 5) + $date['mday'];
99
// --------------------------------------------------------------------
105
* @param string the directory name
108
function _add_dir($dir, $file_mtime, $file_mdate)
110
$dir = str_replace("\\", "/", $dir);
113
"\x50\x4b\x03\x04\x0a\x00\x00\x00\x00\x00"
114
.pack('v', $file_mtime)
115
.pack('v', $file_mdate)
116
.pack('V', 0) // crc32
117
.pack('V', 0) // compressed filesize
118
.pack('V', 0) // uncompressed filesize
119
.pack('v', strlen($dir)) // length of pathname
120
.pack('v', 0) // extra field length
122
// below is "data descriptor" segment
123
.pack('V', 0) // crc32
124
.pack('V', 0) // compressed filesize
125
.pack('V', 0); // uncompressed filesize
128
"\x50\x4b\x01\x02\x00\x00\x0a\x00\x00\x00\x00\x00"
129
.pack('v', $file_mtime)
130
.pack('v', $file_mdate)
131
.pack('V',0) // crc32
132
.pack('V',0) // compressed filesize
133
.pack('V',0) // uncompressed filesize
134
.pack('v', strlen($dir)) // length of pathname
135
.pack('v', 0) // extra field length
136
.pack('v', 0) // file comment length
137
.pack('v', 0) // disk number start
138
.pack('v', 0) // internal file attributes
139
.pack('V', 16) // external file attributes - 'directory' bit set
140
.pack('V', $this->offset) // relative offset of local header
143
$this->offset = strlen($this->zipdata);
147
// --------------------------------------------------------------------
152
* Lets you add files to the archive. If the path is included
153
* in the filename it will be placed within a directory. Make
154
* sure you use add_dir() first to create the folder.
161
function add_data($filepath, $data = NULL)
163
if (is_array($filepath))
165
foreach ($filepath as $path => $data)
167
$file_data = $this->_get_mod_time($path);
169
$this->_add_data($path, $data, $file_data['file_mtime'], $file_data['file_mdate']);
174
$file_data = $this->_get_mod_time($filepath);
176
$this->_add_data($filepath, $data, $file_data['file_mtime'], $file_data['file_mdate']);
180
// --------------------------------------------------------------------
186
* @param string the file name/path
187
* @param string the data to be encoded
190
function _add_data($filepath, $data, $file_mtime, $file_mdate)
192
$filepath = str_replace("\\", "/", $filepath);
194
$uncompressed_size = strlen($data);
195
$crc32 = crc32($data);
197
$gzdata = gzcompress($data);
198
$gzdata = substr($gzdata, 2, -4);
199
$compressed_size = strlen($gzdata);
202
"\x50\x4b\x03\x04\x14\x00\x00\x00\x08\x00"
203
.pack('v', $file_mtime)
204
.pack('v', $file_mdate)
206
.pack('V', $compressed_size)
207
.pack('V', $uncompressed_size)
208
.pack('v', strlen($filepath)) // length of filename
209
.pack('v', 0) // extra field length
211
.$gzdata; // "file data" segment
214
"\x50\x4b\x01\x02\x00\x00\x14\x00\x00\x00\x08\x00"
215
.pack('v', $file_mtime)
216
.pack('v', $file_mdate)
218
.pack('V', $compressed_size)
219
.pack('V', $uncompressed_size)
220
.pack('v', strlen($filepath)) // length of filename
221
.pack('v', 0) // extra field length
222
.pack('v', 0) // file comment length
223
.pack('v', 0) // disk number start
224
.pack('v', 0) // internal file attributes
225
.pack('V', 32) // external file attributes - 'archive' bit set
226
.pack('V', $this->offset) // relative offset of local header
229
$this->offset = strlen($this->zipdata);
234
// --------------------------------------------------------------------
237
* Read the contents of a file and add it to the zip
242
function read_file($path, $preserve_filepath = FALSE)
244
if ( ! file_exists($path))
249
if (FALSE !== ($data = file_get_contents($path)))
251
$name = str_replace("\\", "/", $path);
253
if ($preserve_filepath === FALSE)
255
$name = preg_replace("|.*/(.+)|", "\\1", $name);
258
$this->add_data($name, $data);
264
// ------------------------------------------------------------------------
267
* Read a directory and add it to the zip.
269
* This function recursively reads a folder and everything it contains (including
270
* sub-folders) and creates a zip based on it. Whatever directory structure
271
* is in the original file path will be recreated in the zip file.
274
* @param string path to source
277
function read_dir($path, $preserve_filepath = TRUE, $root_path = NULL)
279
if ( ! $fp = @opendir($path))
284
// Set the original directory root for child dir's to use as relative
285
if ($root_path === NULL)
287
$root_path = dirname($path).'/';
290
while (FALSE !== ($file = readdir($fp)))
292
if (substr($file, 0, 1) == '.')
297
if (@is_dir($path.$file))
299
$this->read_dir($path.$file."/", $preserve_filepath, $root_path);
303
if (FALSE !== ($data = file_get_contents($path.$file)))
305
$name = str_replace("\\", "/", $path);
307
if ($preserve_filepath === FALSE)
309
$name = str_replace($root_path, '', $name);
312
$this->add_data($name.$file, $data);
320
// --------------------------------------------------------------------
326
* @return binary string
330
// Is there any data to return?
331
if ($this->entries == 0)
336
$zip_data = $this->zipdata;
337
$zip_data .= $this->directory."\x50\x4b\x05\x06\x00\x00\x00\x00";
338
$zip_data .= pack('v', $this->entries); // total # of entries "on this disk"
339
$zip_data .= pack('v', $this->entries); // total # of entries overall
340
$zip_data .= pack('V', strlen($this->directory)); // size of central dir
341
$zip_data .= pack('V', strlen($this->zipdata)); // offset to start of central dir
342
$zip_data .= "\x00\x00"; // .zip file comment length
347
// --------------------------------------------------------------------
350
* Write File to the specified directory
352
* Lets you write a file
355
* @param string the file name
358
function archive($filepath)
360
if ( ! ($fp = @fopen($filepath, FOPEN_WRITE_CREATE_DESTRUCTIVE)))
366
fwrite($fp, $this->get_zip());
373
// --------------------------------------------------------------------
379
* @param string the file name
380
* @param string the data to be encoded
383
function download($filename = 'backup.zip')
385
if ( ! preg_match("|.+?\.zip$|", $filename))
390
$CI =& get_instance();
391
$CI->load->helper('download');
393
$get_zip = $this->get_zip();
395
$zip_content =& $get_zip;
397
force_download($filename, $zip_content);
400
// --------------------------------------------------------------------
405
* Lets you clear current zip data. Useful if you need to create
406
* multiple zips with different data.
411
function clear_data()
414
$this->directory = '';
422
/* End of file Zip.php */
423
/* Location: ./system/libraries/Zip.php */
b'\\ No newline at end of file'
added
removed
codeigniter/system/libraries/Zip.php
