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<?php
namespace Http\Message\Encoding;
use Psr\Http\Message\StreamInterface;
/**
* Stream decompress (RFC 1950).
*
* @author Joel Wurtz <joel.wurtz@gmail.com>
*/
class DecompressStream extends FilteredStream
{
/**
* @param StreamInterface $stream
* @param int $level
*/
public function __construct(StreamInterface $stream, $level = -1)
{
if (!extension_loaded('zlib')) {
throw new \RuntimeException('The zlib extension must be enabled to use this stream');
}
parent::__construct($stream, ['window' => 15], ['window' => 15, 'level' => $level]);
}
/**
* {@inheritdoc}
*/
protected function readFilter()
{
return 'zlib.inflate';
}
/**
* {@inheritdoc}
*/
protected function writeFilter()
{
return 'zlib.deflate';
}
}
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