diff core/lib/Drupal/Core/EventSubscriber/ExceptionJsonSubscriber.php @ 0:4c8ae668cc8c

Initial import (non-working)

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/core/lib/Drupal/Core/EventSubscriber/ExceptionJsonSubscriber.php	Wed Nov 29 16:09:58 2017 +0000
@@ -0,0 +1,42 @@
+<?php
+
+namespace Drupal\Core\EventSubscriber;
+
+use Symfony\Component\HttpFoundation\JsonResponse;
+use Symfony\Component\HttpKernel\Event\GetResponseForExceptionEvent;
+
+/**
+ * Default handling for JSON errors.
+ */
+class ExceptionJsonSubscriber extends HttpExceptionSubscriberBase {
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function getHandledFormats() {
+    return ['json', 'drupal_modal', 'drupal_dialog', 'drupal_ajax'];
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  protected static function getPriority() {
+    // This will fire after the most common HTML handler, since HTML requests
+    // are still more common than JSON requests.
+    return -75;
+  }
+
+  /**
+   * Handles all 4xx errors for JSON.
+   *
+   * @param \Symfony\Component\HttpKernel\Event\GetResponseForExceptionEvent $event
+   *   The event to process.
+   */
+  public function on4xx(GetResponseForExceptionEvent $event) {
+    /** @var \Symfony\Component\HttpKernel\Exception\HttpExceptionInterface $exception */
+    $exception = $event->getException();
+    $response = new JsonResponse(['message' => $event->getException()->getMessage()], $exception->getStatusCode(), $exception->getHeaders());
+    $event->setResponse($response);
+  }
+
+}