Issue #3408255 by jurgenhaas, saurabh-2k17: Blocked rerouting of URL for jsonapi

src/EventSubscriber/ResponseSubscriber.php

@@ -107,8 +107,6 @@ class ResponseSubscriber implements EventSubscriberInterface {
    *
    * @param \Symfony\Component\HttpKernel\Event\ResponseEvent $event
    *   The filter event.
-   *
-   * @throws \JsonException
    */
   public function onResponse(ResponseEvent $event): void {
     if ($this->nodeStorage === NULL || !$this->routeMatch->getRouteObject()) {
@@ -117,7 +115,15 @@ class ResponseSubscriber implements EventSubscriberInterface {
     if ($this->routeMatch->getRouteName() === 'jsonapi.resource_list' || Routes::isJsonApiRequest($this->routeMatch->getRouteObject()->getDefaults())) {
       $response = $event->getResponse();
       $content = $response->getContent();
-      $jsonapi_response = json_decode($content, TRUE, 512, JSON_THROW_ON_ERROR);
+      if (!$content) {
+        return;
+      }
+      try {
+        $jsonapi_response = json_decode($content, TRUE, 512, JSON_THROW_ON_ERROR);
+      }
+      catch (\JsonException) {
+        return;
+      }
       if (!is_array($jsonapi_response)) {
         return;
       }
@@ -131,7 +137,13 @@ class ResponseSubscriber implements EventSubscriberInterface {
           $this->findBookDefinition($jsonapi_response['data'][$key]['attributes']);
         }
       }
-      $response->setContent(json_encode($jsonapi_response, JSON_THROW_ON_ERROR));
+      try {
+        $content = json_encode($jsonapi_response, JSON_THROW_ON_ERROR);
+      }
+      catch (\JsonException) {
+        return;
+      }
+      $response->setContent($content);
     }
   }