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<?php
declare(strict_types=1);
namespace Http\Client\Common\Plugin;
use Http\Client\Common\Plugin;
use Http\Message\Encoding\ChunkStream;
use Http\Promise\Promise;
use Psr\Http\Message\RequestInterface;
/**
* Allow to set the correct content length header on the request or to transfer it as a chunk if not possible.
*
* @author Joel Wurtz <joel.wurtz@gmail.com>
*/
final class ContentLengthPlugin implements Plugin
{
/**
* {@inheritdoc}
*/
public function handleRequest(RequestInterface $request, callable $next, callable $first): Promise
{
if (!$request->hasHeader('Content-Length')) {
$stream = $request->getBody();
// Cannot determine the size so we use a chunk stream
if (null === $stream->getSize()) {
$stream = new ChunkStream($stream);
$request = $request->withBody($stream);
$request = $request->withAddedHeader('Transfer-Encoding', 'chunked');
} else {
$request = $request->withHeader('Content-Length', (string) $stream->getSize());
}
}
return $next($request);
}
}