Pass query parameters through local response [closed]

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I'm trying to pass query parameters received on a controller from an external redirect through TrustedRedirectResponse or LocalRedirectResponse. None of the options seem to be working.

Answer 1

Receive the query parameters through the request you've added as parameter to the controller and pass them via the URL of the redirect.

Caching is a bit tricky because generating an absolute local URL bubbles up cacheable metadata which you need to collect by Url::toString(TRUE):

public function view(Request $request) {

  $url = Url::fromRoute(
    '<front>', 
    [], 
    [
      'query' => $request->query->all(),
      'absolute' => TRUE,
    ]
  )->toString(TRUE);

  $redirect = new LocalRedirectResponse($url->getGeneratedUrl());
  $redirect->addCacheableDependency($url);
  $redirect->getCacheableMetadata()->addCacheContexts(['url.query_args']);

  return $redirect;
}