Issue #3078282 by Daniel Kulbe: Service Worker caches admin toolbar and contextual links

diff --git a/pwa.module b/pwa.module

index 4fcfab6..74b7765 100644

--- a/pwa.module

+++ b/pwa.module

@@ -5,6 +5,7 @@

  * PWA hooks.

  */

+use Drupal\Core\Session\AccountInterface;

 use Drupal\Core\Url;

 use Drupal\pwa\Controller\PWAController;

@@ -73,3 +74,10 @@ function pwa_str_to_list($string) {

   $list = array_map('trim', $list);

   return array_filter($list, 'strlen');

 }

+

+/**

+ * Implements hook_user_login().

+ */

+function pwa_user_login(AccountInterface $account) {

+  \Drupal::service('session')->set('pwa_reset', TRUE);

+}

diff --git a/pwa.services.yml b/pwa.services.yml

index 385ec88..e2ce1f1 100644

--- a/pwa.services.yml

+++ b/pwa.services.yml

@@ -5,3 +5,7 @@ services:

       - '@config.factory'

       - '@language_manager'

       - '@theme.manager'

+  pwa.response_subscriber:

+    class: Drupal\pwa\EventSubscriber\ResponseSubscriber

+    tags:

+      - { name: event_subscriber }

diff --git a/src/EventSubscriber/ResponseSubscriber.php b/src/EventSubscriber/ResponseSubscriber.php

new file mode 100644

index 0000000..4fe5457

--- /dev/null

+++ b/src/EventSubscriber/ResponseSubscriber.php

@@ -0,0 +1,64 @@

+<?php

+

+namespace Drupal\pwa\EventSubscriber;

+

+use Symfony\Component\EventDispatcher\EventSubscriberInterface;

+use Symfony\Component\HttpKernel\Event\FilterResponseEvent;

+use Symfony\Component\HttpKernel\KernelEvents;

+

+/**

+ * Respond to event processes.

+ */

+class ResponseSubscriber implements EventSubscriberInterface {

+

+  /**

+   * Additional headers to set on user change.

+   *

+   * @var array

+   */

+  const HEADERS = [

+    'Clear-Site-Data' => '"storage"',

+  ];

+

+  /**

+   * {@inheritdoc}

+   */

+  public static function getSubscribedEvents() {

+    return [

+      KernelEvents::RESPONSE => [

+        ['processResponse', 40],

+      ],

+    ];

+  }

+

+  /**

+   * Clear serviceworker cache on user change.

+   *

+   * @param \Symfony\Component\HttpKernel\Event\FilterResponseEvent $event

+   *   The event to process.

+   *

+   * @see pwa_user_login()

+   */

+  public function processResponse(FilterResponseEvent $event) {

+    $response = $event->getResponse();

+

+    if ($event->getRequest()->get('_route') === 'user.logout') {

+      $response->headers->add(static::HEADERS);

+      return;

+    }

+

+    if (stripos($response->headers->get('Content-Type'), 'text/html') === FALSE) {

+      return;

+    }

+

+    $session = $event->getRequest()->getSession();

+

+    if ($session && $session->get('pwa_reset', FALSE)) {

+      $response->headers->add(static::HEADERS);

+

+      // Only once.

+      $session->remove('pwa_reset');

+    }

+  }

+

+}

 * PWA hooks.

 */

use Drupal\Core\Session\AccountInterface;

use Drupal\Core\Url;

use Drupal\pwa\Controller\PWAController;

  $list = array_map('trim', $list);

  return array_filter($list, 'strlen');

}

/**

 * Implements hook_user_login().

 */

function pwa_user_login(AccountInterface $account) {

  \Drupal::service('session')->set('pwa_reset', TRUE);

}

      - '@config.factory'

      - '@language_manager'

      - '@theme.manager'

  pwa.response_subscriber:

    class: Drupal\pwa\EventSubscriber\ResponseSubscriber

    tags:

      - { name: event_subscriber }

<?php

namespace Drupal\pwa\EventSubscriber;

use Symfony\Component\EventDispatcher\EventSubscriberInterface;

use Symfony\Component\HttpKernel\Event\FilterResponseEvent;

use Symfony\Component\HttpKernel\KernelEvents;

/**

 * Respond to event processes.

 */

class ResponseSubscriber implements EventSubscriberInterface {

  /**

   * Additional headers to set on user change.

   *

   * @var array

   */

  const HEADERS = [

    'Clear-Site-Data' => '"storage"',

  ];

  /**

   * {@inheritdoc}

   */

  public static function getSubscribedEvents() {

    return [

      KernelEvents::RESPONSE => [

        ['processResponse', 40],

      ],

    ];

  }

  /**

   * Clear serviceworker cache on user change.

   *

   * @param \Symfony\Component\HttpKernel\Event\FilterResponseEvent $event

   *   The event to process.

   *

   * @see pwa_user_login()

   */

  public function processResponse(FilterResponseEvent $event) {

    $response = $event->getResponse();

    if ($event->getRequest()->get('_route') === 'user.logout') {

      $response->headers->add(static::HEADERS);

      return;

    }

    if (stripos($response->headers->get('Content-Type'), 'text/html') === FALSE) {

      return;

    }

    $session = $event->getRequest()->getSession();

    if ($session && $session->get('pwa_reset', FALSE)) {

      $response->headers->add(static::HEADERS);

      // Only once.

      $session->remove('pwa_reset');

    }

  }

}