function BigPipeTestSubscriber::onRespondSetBigPipeDebugPlaceholderHeaders

Exposes all BigPipe placeholders (JS and no-JS) via headers for testing.

Parameters

\Symfony\Component\HttpKernel\Event\FilterResponseEvent $event: The event to process.

File

core/modules/big_pipe/tests/modules/big_pipe_test/src/EventSubscriber/BigPipeTestSubscriber.php, line 51

Class

BigPipeTestSubscriber

Namespace

Code

public function onRespondSetBigPipeDebugPlaceholderHeaders(FilterResponseEvent $event) {
    $response = $event->getResponse();
    if (!$response instanceof HtmlResponse) {
        return;
    }
    $attachments = $response->getAttachments();
    $response->headers
        ->set('BigPipe-Test-Placeholders', '<none>');
    $response->headers
        ->set('BigPipe-Test-No-Js-Placeholders', '<none>');
    if (!empty($attachments['big_pipe_placeholders'])) {
        $response->headers
            ->set('BigPipe-Test-Placeholders', implode(' ', array_keys($attachments['big_pipe_placeholders'])));
    }
    if (!empty($attachments['big_pipe_nojs_placeholders'])) {
        $response->headers
            ->set('BigPipe-Test-No-Js-Placeholders', implode(' ', array_map('rawurlencode', array_keys($attachments['big_pipe_nojs_placeholders']))));
    }
}