<?php
/**
* Zend Framework (http://framework.zend.com/)
*
* @link http://github.com/zendframework/zf2 for the canonical source repository
* @copyright Copyright (c) 2005-2014 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
namespace Zend\Filter\Compress;
use Zend\Filter\Exception;
/**
* Compression adapter for Gzip (ZLib)
*/
class Gz extends AbstractCompressionAlgorithm
{
/**
* Compression Options
* array(
* 'level' => Compression level 0-9
* 'mode' => Compression mode, can be 'compress', 'deflate'
* 'archive' => Archive to use
* )
*
* @var array
*/
protected $options = array(
'level' => 9,
'mode' => 'compress',
'archive' => null,
);
/**
* Class constructor
*
* @param null|array|\Traversable $options (Optional) Options to set
* @throws Exception\ExtensionNotLoadedException if zlib extension not loaded
*/
public function __construct($options = null)
{
if (!extension_loaded('zlib')) {
throw new Exception\ExtensionNotLoadedException('This filter needs the zlib extension');
}
parent::__construct($options);
}
/**
* Returns the set compression level
*
* @return int
*/
public function getLevel()
{
return $this->options['level'];
}
/**
* Sets a new compression level
*
* @param int $level
* @throws Exception\InvalidArgumentException
* @return self
*/
public function setLevel($level)
{
if (($level < 0) || ($level > 9)) {
throw new Exception\InvalidArgumentException('Level must be between 0 and 9');
}
$this->options['level'] = (int) $level;
return $this;
}
/**
* Returns the set compression mode
*
* @return string
*/
public function getMode()
{
return $this->options['mode'];
}
/**
* Sets a new compression mode
*
* @param string $mode Supported are 'compress', 'deflate' and 'file'
* @return self
* @throws Exception\InvalidArgumentException for invalid $mode value
*/
public function setMode($mode)
{
if (($mode != 'compress') && ($mode != 'deflate')) {
throw new Exception\InvalidArgumentException('Given compression mode not supported');
}
$this->options['mode'] = $mode;
return $this;
}
/**
* Returns the set archive
*
* @return string
*/
public function getArchive()
{
return $this->options['archive'];
}
/**
* Sets the archive to use for de-/compression
*
* @param string $archive Archive to use
* @return self
*/
public function setArchive($archive)
{
$this->options['archive'] = (string) $archive;
return $this;
}
/**
* Compresses the given content
*
* @param string $content
* @return string
* @throws Exception\RuntimeException if unable to open archive or error during decompression
*/
public function compress($content)
{
$archive = $this->getArchive();
if (!empty($archive)) {
$file = gzopen($archive, 'w' . $this->getLevel());
if (!$file) {
throw new Exception\RuntimeException("Error opening the archive '" . $this->options['archive'] . "'");
}
gzwrite($file, $content);
gzclose($file);
$compressed = true;
} elseif ($this->options['mode'] == 'deflate') {
$compressed = gzdeflate($content, $this->getLevel());
} else {
$compressed = gzcompress($content, $this->getLevel());
}
if (!$compressed) {
throw new Exception\RuntimeException('Error during compression');
}
return $compressed;
}
/**
* Decompresses the given content
*
* @param string $content
* @return string
* @throws Exception\RuntimeException if unable to open archive or error during decompression
*/
public function decompress($content)
{
$archive = $this->getArchive();
$mode = $this->getMode();
//check if there are null byte characters before doing a file_exists check
if (!strstr($content, "\0") && file_exists($content)) {
$archive = $content;
}
if (file_exists($archive)) {
$handler = fopen($archive, "rb");
if (!$handler) {
throw new Exception\RuntimeException("Error opening the archive '" . $archive . "'");
}
fseek($handler, -4, SEEK_END);
$packet = fread($handler, 4);
$bytes = unpack("V", $packet);
$size = end($bytes);
fclose($handler);
$file = gzopen($archive, 'r');
$compressed = gzread($file, $size);
gzclose($file);
} elseif ($mode == 'deflate') {
$compressed = gzinflate($content);
} else {
$compressed = gzuncompress($content);
}
if ($compressed === false) {
throw new Exception\RuntimeException('Error during decompression');
}
return $compressed;
}
/**
* Returns the adapter name
*
* @return string
*/
public function toString()
{
return 'Gz';
}
}
# |
Change |
User |
Description |
Committed |
|
#1
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18334 |
Liz Lam |
initial add of jambox |
|
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