Add header in the s3 S3StreamWrapper

[ping86]

I need add in the Cybernox\AmazonWebServicesBundle\StreamWrapper\StreamWrapper file the header parameters.

In the function buildHeadersForContent I need adde the following header:

$headers['Cache-Control'] = "max-age=2592000";

  private function buildHeadersForContent($content)
    {
        $path = tempnam(sys_get_temp_dir(), 's3_mime_type');        
        file_put_contents($path, $content);

        $headers = array();

        //My custom header
        $headers['Cache-Control'] = "max-age=2592000";

        if($this->isFileGzipped($path)){
            $headers['Content-Encoding'] = "gzip";
        }

        unlink($path);

        return $headers;
    }

How I can do this without modifying the bundle? Is there any option?

Thanks.