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<?php
declare(strict_types=1);
namespace Sentry\HttpClient\Plugin;
use Http\Client\Common\Plugin as PluginInterface;
use Http\Promise\Promise as PromiseInterface;
use Psr\Http\Message\RequestInterface;
use Psr\Http\Message\StreamFactoryInterface;
/**
* This plugin encodes the request body by compressing it with Gzip.
*
* @author Stefano Arlandini <sarlandini@alice.it>
*/
final class GzipEncoderPlugin implements PluginInterface
{
/**
* @var StreamFactoryInterface The PSR-17 stream factory
*/
private $streamFactory;
/**
* Constructor.
*
* @param StreamFactoryInterface $streamFactory The stream factory
*
* @throws \RuntimeException If the zlib extension is not enabled
*/
public function __construct(StreamFactoryInterface $streamFactory)
{
if (!\extension_loaded('zlib')) {
throw new \RuntimeException('The "zlib" extension must be enabled to use this plugin.');
}
$this->streamFactory = $streamFactory;
}
/**
* {@inheritdoc}
*/
public function handleRequest(RequestInterface $request, callable $next, callable $first): PromiseInterface
{
$requestBody = $request->getBody();
if ($requestBody->isSeekable()) {
$requestBody->rewind();
}
// Instead of using a stream filter we have to compress the whole request
// body in one go to work around a PHP bug. See https://github.com/getsentry/sentry-php/pull/877
$encodedBody = gzcompress($requestBody->getContents(), -1, \ZLIB_ENCODING_GZIP);
if (false === $encodedBody) {
throw new \RuntimeException('Failed to GZIP-encode the request body.');
}
$request = $request->withHeader('Content-Encoding', 'gzip');
$request = $request->withBody($this->streamFactory->createStream($encodedBody));
return $next($request);
}
}