Derive response cacheability from the public scheme and file_additional_public_schemes

namespace Drupal\imageapi_optimize_webp\Controller;

use Drupal\Core\Site\Settings;

use Drupal\image\Controller\ImageStyleDownloadController as CoreImageStyleDownloadController;

use Drupal\image\ImageStyleInterface;

use Symfony\Component\HttpFoundation\BinaryFileResponse;

              'Content-Type' => 'image/webp',

              'Content-Length' => $image->getFileSize(),

            ];

            return new BinaryFileResponse($uri, 200, $headers, $scheme !== 'private');

            // Only the public scheme and schemes opted into the

            // file_additional_public_schemes setting may be marked publicly

            // cacheable; all other schemes are access controlled.

            $additional_public_schemes = array_diff(

              Settings::get('file_additional_public_schemes', []),

              ['public', 'private', 'temporary'],

            );

            $is_public = in_array(

              $this->streamWrapperManager->getScheme($derivative_uri),

              array_merge(['public'], $additional_public_schemes),

              TRUE,

            );

            return new BinaryFileResponse($uri, 200, $headers, $is_public);

          }

          // If the derivative does not exist, return a failed reponse.

          return new Response($this->t('Error generating image.'), 500);