Source of file Gz.php
Size: 5,558 Bytes - Last Modified: 2014-03-12T23:21:18+01:00
/home/theseer/Downloads/ZendFramework-2.3.0/library/Zend/Filter/Compress/Gz.php
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212 | <?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'; } } |