Fix for issue #21299. Change HEAD action mapping to GET action interface and add HEAD request handling

Author: Oleksandr Iegorov

lib/internal/Magento/Framework/File/Transfer/Adapter/Http.php

@@ -10,6 +10,7 @@
 use Magento\Framework\File\Mime;
 use Magento\Framework\App\Request\Http as HttpRequest;
 use Magento\Framework\App\ObjectManager;
+use Zend\Http\Headers;
 
 /**
  * File adapter to send the file to the client.
@@ -114,7 +115,7 @@ private function getFilePath($options): string
     private function prepareResponse($options, string $filepath): void
     {
         $mimeType = $this->mime->getMimeType($filepath);
-        if (is_array($options) && isset($options['headers']) && $options['headers'] instanceof \Zend\Http\Headers) {
+        if (is_array($options) && isset($options['headers']) && $options['headers'] instanceof Headers) {
             $this->response->setHeaders($options['headers']);
         }
         $this->response->setHeader('Content-length', filesize($filepath));