<?php

namespace Http\Message\Encoding;

use Clue\StreamFilter as Filter;

use Psr\Http\Message\StreamInterface;

/**

* Stream for decoding from gzip format (RFC 1952).

*

* @author Joel Wurtz <[email protected]>

*/

class GzipDecodeStream extends FilteredStream

{

/**

* @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' => 31]);

// @deprecated will be removed in 2.0

$this->writeFilterCallback = Filter\fun($this->writeFilter(), ['window' => 31, 'level' => $level]);

}

protected function readFilter(): string

{

return 'zlib.inflate';

}

protected function writeFilter(): string

{

return 'zlib.deflate';

}

}