DefaultResponseSenderStrategy.php

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<?php

namespace ILIAS\HTTP\Response\Sender;

use Psr\Http\Message\ResponseInterface;

class DefaultResponseSenderStrategy implements ResponseSenderStrategy
{

    public function sendResponse(ResponseInterface $response) : void
    {
        //check if the request is already send
        if (headers_sent()) {
            throw new ResponseSendingException("Response was already sent.");
        }

        //set status code
        http_response_code($response->getStatusCode());

        //render all headers
        foreach ($response->getHeaders() as $key => $header) {
            header("$key: " . $response->getHeaderLine($key));
        }

        //rewind body stream
        $response->getBody()->rewind();

        //detach psr-7 stream from resource
        $resource = $response->getBody()->detach();

        $sendStatus = false;

        if (is_resource($resource)) {
            set_time_limit(0);
            ob_end_clean(); // see https://mantis.ilias.de/view.php?id=32046
            $sendStatus = fpassthru($resource);

            //free up resources
            fclose($resource);
        }

        //check if the body was successfully send to the client
        if ($sendStatus === false) {
            throw new ResponseSendingException("Could not send body content to client.");
        }
    }
}