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<?php
declare(strict_types=1);
namespace App\Middleware;
use App\Stream\Data\Converter;
use App\Stream\Data\PrintRConverter;
use App\Stream\DataStream;
use Psr\Container\ContainerInterface;
use Psr\Http\Message\ResponseInterface;
use Psr\Http\Message\ServerRequestInterface;
use Psr\Http\Server\MiddlewareInterface;
use Psr\Http\Server\RequestHandlerInterface;
final class RenderDataStream implements MiddlewareInterface
{
private ContainerInterface $container;
public function __construct(ContainerInterface $container)
$this->container = $container;
}
public function process(ServerRequestInterface $request, RequestHandlerInterface $handler): ResponseInterface
$response = $handler->handle($request);
$stream = $response->getBody();
if (!$stream instanceof DataStream) {
return $response;
$converterClass = $stream->getConverter();
if ($converterClass === null) {
# todo: get most relevant format from header
$converterClass = PrintRConverter::class;
/** @var Converter $converter */
$converter = $this->container->get($converterClass);
$stream->render($converter);
return $response->withHeader('Content-Type', $converter::getFormat());
yiisoft /
yii-demo
