485 lines
12 KiB
PHP
485 lines
12 KiB
PHP
<?php
|
|
/**
|
|
* CodeIgniter
|
|
*
|
|
* An open source application development framework for PHP
|
|
*
|
|
* This content is released under the MIT License (MIT)
|
|
*
|
|
* Copyright (c) 2014 - 2015, 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. (http://ellislab.com/)
|
|
* @copyright Copyright (c) 2014 - 2015, British Columbia Institute of Technology (http://bcit.ca/)
|
|
* @license http://opensource.org/licenses/MIT MIT License
|
|
* @link http://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 http://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;
|
|
|
|
/**
|
|
* Initialize zip compression class
|
|
*
|
|
* @return void
|
|
*/
|
|
public function __construct()
|
|
{
|
|
$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', $file_mdate)
|
|
.pack('V', 0) // crc32
|
|
.pack('V', 0) // compressed filesize
|
|
.pack('V', 0) // uncompressed filesize
|
|
.pack('v', strlen($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.
|
|
*
|
|
* @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);
|
|
|
|
$uncompressed_size = strlen($data);
|
|
$crc32 = crc32($data);
|
|
$gzdata = substr(gzcompress($data, $this->compression_level), 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
|
|
*
|
|
* @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 relative
|
|
if ($root_path === NULL)
|
|
{
|
|
$root_path = dirname($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', $this->entries) // total # of entries overall
|
|
.pack('V', strlen($this->directory)) // size of central dir
|
|
.pack('V', 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(), $length = strlen($data); $written < $length; $written += $result)
|
|
{
|
|
if (($result = fwrite($fp, substr($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;
|
|
}
|
|
|
|
}
|