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-rw-r--r--system/libraries/Zip.php382
1 files changed, 245 insertions, 137 deletions
diff --git a/system/libraries/Zip.php b/system/libraries/Zip.php
index ffff3f340..6b9b1816b 100644
--- a/system/libraries/Zip.php
+++ b/system/libraries/Zip.php
@@ -1,25 +1,48 @@
-<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+<?php
/**
* CodeIgniter
*
- * An open source application development framework for PHP 5.1.6 or newer
+ * An open source application development framework for PHP
*
- * @package CodeIgniter
- * @author ExpressionEngine Dev Team
- * @copyright Copyright (c) 2008 - 2014, EllisLab, Inc.
- * @license http://codeigniter.com/user_guide/license.html
- * @link http://codeigniter.com
- * @since Version 1.0
+ * This content is released under the MIT License (MIT)
+ *
+ * Copyright (c) 2019 - 2022, CodeIgniter Foundation
+ *
+ * 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 - 2019, British Columbia Institute of Technology (https://bcit.ca/)
+ * @copyright Copyright (c) 2019 - 2022, CodeIgniter Foundation (https://codeigniter.com/)
+ * @license https://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
+ * https://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
@@ -27,26 +50,80 @@
* @package CodeIgniter
* @subpackage Libraries
* @category Encryption
- * @author ExpressionEngine Dev Team
- * @link http://codeigniter.com/user_guide/libraries/zip.html
+ * @author EllisLab Dev Team
+ * @link https://codeigniter.com/userguide3/libraries/zip.html
*/
-class CI_Zip {
+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;
- var $zipdata = '';
- var $directory = '';
- var $entries = 0;
- var $file_num = 0;
- var $offset = 0;
- var $now;
+ /**
+ * Number of files in zip
+ *
+ * @var int
+ */
+ public $file_num = 0;
/**
- * Constructor
+ * 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 $func_overload;
+
+ /**
+ * Initialize zip compression class
+ *
+ * @return void
*/
public function __construct()
{
- log_message('debug', "Zip Compression Class Initialized");
+ isset(self::$func_overload) OR self::$func_overload = ( ! is_php('8.0') && extension_loaded('mbstring') && @ini_get('mbstring.func_overload'));
$this->now = time();
+ log_message('info', 'Zip Compression Class Initialized');
}
// --------------------------------------------------------------------
@@ -56,21 +133,19 @@ class CI_Zip {
*
* Lets you add a virtual directory into which you can place files.
*
- * @access public
- * @param mixed the directory name. Can be string or array
+ * @param mixed $directory the directory name. Can be string or array
* @return void
*/
- function add_dir($directory)
+ public function add_dir($directory)
{
- foreach ((array)$directory as $dir)
+ foreach ((array) $directory as $dir)
{
- if ( ! preg_match("|.+/$|", $dir))
+ if ( ! preg_match('|.+/$|', $dir))
{
$dir .= '/';
}
$dir_time = $this->_get_mod_time($dir);
-
$this->_add_dir($dir, $dir_time['file_mtime'], $dir_time['file_mdate']);
}
}
@@ -78,22 +153,22 @@ class CI_Zip {
// --------------------------------------------------------------------
/**
- * Get file/directory modification time
+ * Get file/directory modification time
*
- * If this is a newly created file/dir, we will set the time to 'now'
+ * If this is a newly created file/dir, we will set the time to 'now'
*
- * @param string path to file
- * @return array filemtime/filemdate
+ * @param string $dir path to file
+ * @return array filemtime/filemdate
*/
- function _get_mod_time($dir)
+ protected function _get_mod_time($dir)
{
- // filemtime() will return false, but it does raise an error.
- $date = (@filemtime($dir)) ? filemtime($dir) : getdate($this->now);
+ // filemtime() may return false, but raises an error for non-existing files
+ $date = file_exists($dir) ? getdate(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 $time;
+ return array(
+ 'file_mtime' => ($date['hours'] << 11) + ($date['minutes'] << 5) + $date['seconds'] / 2,
+ 'file_mdate' => (($date['year'] - 1980) << 9) + ($date['mon'] << 5) + $date['mday']
+ );
}
// --------------------------------------------------------------------
@@ -101,13 +176,14 @@ class CI_Zip {
/**
* Add Directory
*
- * @access private
- * @param string the directory name
+ * @param string $dir the directory name
+ * @param int $file_mtime
+ * @param int $file_mdate
* @return void
*/
- function _add_dir($dir, $file_mtime, $file_mdate)
+ protected function _add_dir($dir, $file_mtime, $file_mdate)
{
- $dir = str_replace("\\", "/", $dir);
+ $dir = str_replace('\\', '/', $dir);
$this->zipdata .=
"\x50\x4b\x03\x04\x0a\x00\x00\x00\x00\x00"
@@ -116,7 +192,7 @@ class CI_Zip {
.pack('V', 0) // crc32
.pack('V', 0) // compressed filesize
.pack('V', 0) // uncompressed filesize
- .pack('v', strlen($dir)) // length of pathname
+ .pack('v', self::strlen($dir)) // length of pathname
.pack('v', 0) // extra field length
.$dir
// below is "data descriptor" segment
@@ -131,7 +207,7 @@ class CI_Zip {
.pack('V',0) // crc32
.pack('V',0) // compressed filesize
.pack('V',0) // uncompressed filesize
- .pack('v', strlen($dir)) // length of pathname
+ .pack('v', self::strlen($dir)) // length of pathname
.pack('v', 0) // extra field length
.pack('v', 0) // file comment length
.pack('v', 0) // disk number start
@@ -140,7 +216,7 @@ class CI_Zip {
.pack('V', $this->offset) // relative offset of local header
.$dir;
- $this->offset = strlen($this->zipdata);
+ $this->offset = self::strlen($this->zipdata);
$this->entries++;
}
@@ -150,29 +226,26 @@ class CI_Zip {
* 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
+ * 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
+ * @param mixed $filepath A single filepath or an array of file => data pairs
+ * @param string $data Single file contents
* @return void
*/
- function add_data($filepath, $data = NULL)
+ public function add_data($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']);
}
}
@@ -182,21 +255,20 @@ class CI_Zip {
/**
* Add Data to Zip
*
- * @access private
- * @param string the file name/path
- * @param string the data to be encoded
+ * @param string $filepath the file name/path
+ * @param string $data the data to be encoded
+ * @param int $file_mtime
+ * @param int $file_mdate
* @return void
*/
- function _add_data($filepath, $data, $file_mtime, $file_mdate)
+ protected function _add_data($filepath, $data, $file_mtime, $file_mdate)
{
- $filepath = str_replace("\\", "/", $filepath);
+ $filepath = str_replace('\\', '/', $filepath);
- $uncompressed_size = strlen($data);
+ $uncompressed_size = self::strlen($data);
$crc32 = crc32($data);
-
- $gzdata = gzcompress($data);
- $gzdata = substr($gzdata, 2, -4);
- $compressed_size = strlen($gzdata);
+ $gzdata = self::substr(gzcompress($data, $this->compression_level), 2, -4);
+ $compressed_size = self::strlen($gzdata);
$this->zipdata .=
"\x50\x4b\x03\x04\x14\x00\x00\x00\x08\x00"
@@ -205,7 +277,7 @@ class CI_Zip {
.pack('V', $crc32)
.pack('V', $compressed_size)
.pack('V', $uncompressed_size)
- .pack('v', strlen($filepath)) // length of filename
+ .pack('v', self::strlen($filepath)) // length of filename
.pack('v', 0) // extra field length
.$filepath
.$gzdata; // "file data" segment
@@ -217,7 +289,7 @@ class CI_Zip {
.pack('V', $crc32)
.pack('V', $compressed_size)
.pack('V', $uncompressed_size)
- .pack('v', strlen($filepath)) // length of filename
+ .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
@@ -226,7 +298,7 @@ class CI_Zip {
.pack('V', $this->offset) // relative offset of local header
.$filepath;
- $this->offset = strlen($this->zipdata);
+ $this->offset = self::strlen($this->zipdata);
$this->entries++;
$this->file_num++;
}
@@ -236,28 +308,32 @@ class CI_Zip {
/**
* Read the contents of a file and add it to the zip
*
- * @access public
+ * @param string $path
+ * @param bool $archive_filepath
* @return bool
*/
- function read_file($path, $preserve_filepath = FALSE)
+ public function read_file($path, $archive_filepath = FALSE)
{
- if ( ! file_exists($path))
- {
- return FALSE;
- }
-
- if (FALSE !== ($data = file_get_contents($path)))
+ if (file_exists($path) && FALSE !== ($data = file_get_contents($path)))
{
- $name = str_replace("\\", "/", $path);
-
- if ($preserve_filepath === FALSE)
+ if (is_string($archive_filepath))
+ {
+ $name = str_replace('\\', '/', $archive_filepath);
+ }
+ else
{
- $name = preg_replace("|.*/(.+)|", "\\1", $name);
+ $name = str_replace('\\', '/', $path);
+
+ if ($archive_filepath === FALSE)
+ {
+ $name = preg_replace('|.*/(.+)|', '\\1', $name);
+ }
}
$this->add_data($name, $data);
return TRUE;
}
+
return FALSE;
}
@@ -267,15 +343,17 @@ class CI_Zip {
* 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
+ * 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
+ * @param string $path path to source directory
+ * @param bool $preserve_filepath
+ * @param string $root_path
* @return bool
*/
- function read_dir($path, $preserve_filepath = TRUE, $root_path = NULL)
+ public function read_dir($path, $preserve_filepath = TRUE, $root_path = NULL)
{
+ $path = rtrim($path, '/\\').DIRECTORY_SEPARATOR;
if ( ! $fp = @opendir($path))
{
return FALSE;
@@ -284,36 +362,33 @@ class CI_Zip {
// Set the original directory root for child dir's to use as relative
if ($root_path === NULL)
{
- $root_path = dirname($path).'/';
+ $root_path = str_replace(array('\\', '/'), DIRECTORY_SEPARATOR, dirname($path)).DIRECTORY_SEPARATOR;
}
while (FALSE !== ($file = readdir($fp)))
{
- if (substr($file, 0, 1) == '.')
+ if ($file === '.' OR $file === '..')
{
continue;
}
- if (@is_dir($path.$file))
+ if (is_dir($path.$file))
{
- $this->read_dir($path.$file."/", $preserve_filepath, $root_path);
+ $this->read_dir($path.$file.DIRECTORY_SEPARATOR, $preserve_filepath, $root_path);
}
- else
+ elseif (FALSE !== ($data = file_get_contents($path.$file)))
{
- if (FALSE !== ($data = file_get_contents($path.$file)))
+ $name = str_replace(array('\\', '/'), DIRECTORY_SEPARATOR, $path);
+ if ($preserve_filepath === FALSE)
{
- $name = str_replace("\\", "/", $path);
-
- if ($preserve_filepath === FALSE)
- {
- $name = str_replace($root_path, '', $name);
- }
-
- $this->add_data($name.$file, $data);
+ $name = str_replace($root_path, '', $name);
}
+
+ $this->add_data($name.$file, $data);
}
}
+ closedir($fp);
return TRUE;
}
@@ -322,26 +397,24 @@ class CI_Zip {
/**
* Get the Zip file
*
- * @access public
- * @return binary string
+ * @return string (binary encoded)
*/
- function get_zip()
+ public function get_zip()
{
// Is there any data to return?
- if ($this->entries == 0)
+ if ($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;
+ // @see https://github.com/bcit-ci/CodeIgniter/issues/5864
+ $footer = $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
+ return $this->zipdata.$footer;
}
// --------------------------------------------------------------------
@@ -351,23 +424,30 @@ class CI_Zip {
*
* Lets you write a file
*
- * @access public
- * @param string the file name
+ * @param string $filepath the file name
* @return bool
*/
- function archive($filepath)
+ public function archive($filepath)
{
- if ( ! ($fp = @fopen($filepath, FOPEN_WRITE_CREATE_DESTRUCTIVE)))
+ if ( ! ($fp = @fopen($filepath, 'w+b')))
{
return FALSE;
}
flock($fp, LOCK_EX);
- fwrite($fp, $this->get_zip());
+
+ for ($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($fp);
- return TRUE;
+ return is_int($result);
}
// --------------------------------------------------------------------
@@ -375,23 +455,18 @@ class CI_Zip {
/**
* Download
*
- * @access public
- * @param string the file name
- * @param string the data to be encoded
- * @return bool
+ * @param string $filename the file name
+ * @return void
*/
- function download($filename = 'backup.zip')
+ public function download($filename = 'backup.zip')
{
- if ( ! preg_match("|.+?\.zip$|", $filename))
+ if ( ! preg_match('|.+?\.zip$|', $filename))
{
$filename .= '.zip';
}
- $CI =& get_instance();
- $CI->load->helper('download');
-
+ get_instance()->load->helper('download');
$get_zip = $this->get_zip();
-
$zip_content =& $get_zip;
force_download($filename, $zip_content);
@@ -402,22 +477,55 @@ class CI_Zip {
/**
* Initialize Data
*
- * Lets you clear current zip data. Useful if you need to create
+ * Lets you clear current zip data. Useful if you need to create
* multiple zips with different data.
*
- * @access public
- * @return void
+ * @return CI_Zip
*/
- function clear_data()
+ public function clear_data()
{
- $this->zipdata = '';
- $this->directory = '';
- $this->entries = 0;
- $this->file_num = 0;
- $this->offset = 0;
+ $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);
+ }
-/* End of file Zip.php */
-/* Location: ./system/libraries/Zip.php */ \ No newline at end of file
+ // --------------------------------------------------------------------
+
+ /**
+ * 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)
+ {
+ return mb_substr($str, $start, $length, '8bit');
+ }
+
+ return isset($length)
+ ? substr($str, $start, $length)
+ : substr($str, $start);
+ }
+}
generated by cgit v1.2.3-24-g4f1b (git 2.32.0) at 2024-12-03 09:30:22 +0100