67 lines
2.6 KiB
Plaintext
67 lines
2.6 KiB
Plaintext
<?php
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/**
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* @file
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* Adds BigPipe no-JS detection.
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*/
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use Drupal\big_pipe\Render\Placeholder\BigPipeStrategy;
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use Drupal\Core\Routing\RouteMatchInterface;
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use Drupal\Core\Url;
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/**
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* Implements hook_help().
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*/
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function big_pipe_help($route_name, RouteMatchInterface $route_match) {
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switch ($route_name) {
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case 'help.page.big_pipe':
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$output = '<h3>' . t('About') . '</h3>';
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$output .= '<p>' . t('The BigPipe module sends pages with dynamic content in a way that allows browsers to show them much faster. For more information, see the <a href=":big_pipe-documentation">online documentation for the BigPipe module</a>.', [':big_pipe-documentation' => 'https://www.drupal.org/documentation/modules/big_pipe']) . '</p>';
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$output .= '<h3>' . t('Uses') . '</h3>';
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$output .= '<dl>';
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$output .= '<dt>' . t('Speeding up your site') . '</dt>';
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$output .= '<dd>' . t('The module requires no configuration. Every part of the page contains metadata that allows BigPipe to figure this out on its own.') . '</dd>';
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$output .= '</dl>';
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return $output;
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}
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}
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/**
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* Implements hook_page_attachments().
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*
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* @see \Drupal\big_pipe\Controller\BigPipeController::setNoJsCookie()
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*/
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function big_pipe_page_attachments(array &$page) {
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// Routes that don't use BigPipe also don't need no-JS detection.
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if (\Drupal::routeMatch()->getRouteObject()->getOption('_no_big_pipe')) {
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return;
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}
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$request = \Drupal::request();
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// BigPipe is only used when there is an actual session, so only add the no-JS
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// detection when there actually is a session.
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// @see \Drupal\big_pipe\Render\Placeholder\BigPipeStrategy.
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$session_exists = \Drupal::service('session_configuration')->hasSession($request);
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$page['#cache']['contexts'][] = 'session.exists';
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// Only do the no-JS detection while we don't know if there's no JS support:
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// avoid endless redirect loops.
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$has_big_pipe_nojs_cookie = $request->cookies->has(BigPipeStrategy::NOJS_COOKIE);
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$page['#cache']['contexts'][] = 'cookies:' . BigPipeStrategy::NOJS_COOKIE;
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if ($session_exists && !$has_big_pipe_nojs_cookie) {
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$page['#attached']['html_head'][] = [
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[
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// Redirect through a 'Refresh' meta tag if JavaScript is disabled.
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'#tag' => 'meta',
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'#noscript' => TRUE,
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'#attributes' => [
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'http-equiv' => 'Refresh',
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// @todo: Switch to Url::fromRoute() once https://www.drupal.org/node/2589967 is resolved.
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'content' => '0; URL=' . Url::fromUri('internal:/big_pipe/no-js', ['query' => \Drupal::service('redirect.destination')->getAsArray()])->toString(),
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],
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],
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'big_pipe_detect_nojs',
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];
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}
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}
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