Version 1

[yaffs-website] / web / core / modules / dynamic_page_cache / src / PageCache / ResponsePolicy / DenyAdminRoutes.php

diff --git a/web/core/modules/dynamic_page_cache/src/PageCache/ResponsePolicy/DenyAdminRoutes.php b/web/core/modules/dynamic_page_cache/src/PageCache/ResponsePolicy/DenyAdminRoutes.php
new file mode 100644 (file)
index 0000000..6857163
--- /dev/null
+++ b/web/core/modules/dynamic_page_cache/src/PageCache/ResponsePolicy/DenyAdminRoutes.php
@@ -0,0 +1,45 @@
+<?php
+
+namespace Drupal\dynamic_page_cache\PageCache\ResponsePolicy;
+
+use Drupal\Core\PageCache\ResponsePolicyInterface;
+use Drupal\Core\Routing\RouteMatchInterface;
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\HttpFoundation\Response;
+
+/**
+ * Cache policy for routes with the '_admin_route' option set.
+ *
+ * This policy rule denies caching of responses generated for admin routes,
+ * because admin routes have very low cache hit ratios due to low traffic and
+ * form submissions.
+ */
+class DenyAdminRoutes implements ResponsePolicyInterface {
+
+  /**
+   * The current route match.
+   *
+   * @var \Drupal\Core\Routing\RouteMatchInterface
+   */
+  protected $routeMatch;
+
+  /**
+   * Constructs a deny admin route page cache policy.
+   *
+   * @param \Drupal\Core\Routing\RouteMatchInterface $route_match
+   *   The current route match.
+   */
+  public function __construct(RouteMatchInterface $route_match) {
+    $this->routeMatch = $route_match;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function check(Response $response, Request $request) {
+    if (($route = $this->routeMatch->getRouteObject()) && $route->getOption('_admin_route')) {
+      return static::DENY;
+    }
+  }
+
+}