229 Zeilen
5,9 KiB
PHP
229 Zeilen
5,9 KiB
PHP
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<?php
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/**
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* Zend Framework
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*
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* LICENSE
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*
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* This source file is subject to the new BSD license that is bundled
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* with this package in the file LICENSE.txt.
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* It is also available through the world-wide-web at this URL:
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* http://framework.zend.com/license/new-bsd
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* If you did not receive a copy of the license and are unable to
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* obtain it through the world-wide-web, please send an email
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* to license@zend.com so we can send you a copy immediately.
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*
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* @category Zend
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* @package Zend_Filter
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* @copyright Copyright (c) 2005-2011 Zend Technologies USA Inc. (http://www.zend.com)
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* @license http://framework.zend.com/license/new-bsd New BSD License
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* @version $Id$
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*/
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/**
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* @see Zend_Filter_Compress_CompressAbstract
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*/
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require_once 'Zend/Filter/Compress/CompressAbstract.php';
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/**
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* Compression adapter for Gzip (ZLib)
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*
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* @category Zend
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* @package Zend_Filter
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* @copyright Copyright (c) 2005-2011 Zend Technologies USA Inc. (http://www.zend.com)
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* @license http://framework.zend.com/license/new-bsd New BSD License
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*/
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class Zend_Filter_Compress_Gz extends Zend_Filter_Compress_CompressAbstract
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{
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/**
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* Compression Options
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* array(
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* 'level' => Compression level 0-9
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* 'mode' => Compression mode, can be 'compress', 'deflate'
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* 'archive' => Archive to use
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* )
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*
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* @var array
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*/
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protected $_options = array(
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'level' => 9,
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'mode' => 'compress',
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'archive' => null,
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);
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/**
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* Class constructor
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*
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* @param array|Zend_Config|null $options (Optional) Options to set
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*/
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public function __construct($options = null)
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{
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if (!extension_loaded('zlib')) {
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require_once 'Zend/Filter/Exception.php';
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throw new Zend_Filter_Exception('This filter needs the zlib extension');
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}
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parent::__construct($options);
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}
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/**
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* Returns the set compression level
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*
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* @return integer
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*/
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public function getLevel()
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{
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return $this->_options['level'];
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}
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/**
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* Sets a new compression level
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*
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* @param integer $level
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* @return Zend_Filter_Compress_Gz
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*/
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public function setLevel($level)
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{
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if (($level < 0) || ($level > 9)) {
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require_once 'Zend/Filter/Exception.php';
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throw new Zend_Filter_Exception('Level must be between 0 and 9');
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}
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$this->_options['level'] = (int) $level;
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return $this;
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}
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/**
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* Returns the set compression mode
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*
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* @return string
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*/
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public function getMode()
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{
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return $this->_options['mode'];
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}
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/**
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* Sets a new compression mode
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*
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* @param string $mode Supported are 'compress', 'deflate' and 'file'
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*/
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public function setMode($mode)
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{
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if (($mode != 'compress') && ($mode != 'deflate')) {
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require_once 'Zend/Filter/Exception.php';
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throw new Zend_Filter_Exception('Given compression mode not supported');
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}
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$this->_options['mode'] = $mode;
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return $this;
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}
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/**
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* Returns the set archive
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*
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* @return string
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*/
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public function getArchive()
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{
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return $this->_options['archive'];
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}
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/**
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* Sets the archive to use for de-/compression
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*
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* @param string $archive Archive to use
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* @return Zend_Filter_Compress_Gz
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*/
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public function setArchive($archive)
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{
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$this->_options['archive'] = (string) $archive;
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return $this;
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}
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/**
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* Compresses the given content
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*
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* @param string $content
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* @return string
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*/
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public function compress($content)
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{
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$archive = $this->getArchive();
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if (!empty($archive)) {
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$file = gzopen($archive, 'w' . $this->getLevel());
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if (!$file) {
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require_once 'Zend/Filter/Exception.php';
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throw new Zend_Filter_Exception("Error opening the archive '" . $this->_options['archive'] . "'");
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}
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gzwrite($file, $content);
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gzclose($file);
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$compressed = true;
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} else if ($this->_options['mode'] == 'deflate') {
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$compressed = gzdeflate($content, $this->getLevel());
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} else {
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$compressed = gzcompress($content, $this->getLevel());
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}
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if (!$compressed) {
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require_once 'Zend/Filter/Exception.php';
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throw new Zend_Filter_Exception('Error during compression');
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}
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return $compressed;
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}
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/**
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* Decompresses the given content
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*
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* @param string $content
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* @return string
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*/
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public function decompress($content)
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{
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$archive = $this->getArchive();
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$mode = $this->getMode();
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if (file_exists($content)) {
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$archive = $content;
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}
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if (file_exists($archive)) {
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$handler = fopen($archive, "rb");
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if (!$handler) {
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require_once 'Zend/Filter/Exception.php';
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throw new Zend_Filter_Exception("Error opening the archive '" . $archive . "'");
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}
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fseek($handler, -4, SEEK_END);
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$packet = fread($handler, 4);
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$bytes = unpack("V", $packet);
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$size = end($bytes);
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fclose($handler);
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$file = gzopen($archive, 'r');
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$compressed = gzread($file, $size);
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gzclose($file);
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} else if ($mode == 'deflate') {
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$compressed = gzinflate($content);
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} else {
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$compressed = gzuncompress($content);
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}
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if (!$compressed) {
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require_once 'Zend/Filter/Exception.php';
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throw new Zend_Filter_Exception('Error during compression');
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}
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return $compressed;
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}
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/**
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* Returns the adapter name
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*
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* @return string
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*/
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public function toString()
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{
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return 'Gz';
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}
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}
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