/**
  * parses the http response headers to create a new {@link
  * org.jclouds.aws.s3.domain.internal.MutableObjectMetadata} object.
  */
 public MutableObjectMetadata apply(HttpResponse from) {
   BlobMetadata base = blobMetadataParser.apply(from);
   MutableObjectMetadata to = blobToObjectMetadata.apply(base);
   addETagTo(from, to);
   to.setContentMD5(HttpUtils.fromHexString(to.getETag().replaceAll("\"", "")));
   to.setCacheControl(from.getFirstHeaderOrNull(HttpHeaders.CACHE_CONTROL));
   to.setContentDisposition(from.getFirstHeaderOrNull("Content-Disposition"));
   to.setContentEncoding(from.getFirstHeaderOrNull(HttpHeaders.CONTENT_ENCODING));
   return to;
 }