code: static Integer parseShareQuota(final HttpURLConnection request) {
          Integer shareQuota = request.getHeaderFieldInt(FileConstants.SHARE_QUOTA_HEADER, -1);
          return (shareQuota == -1) ? null : shareQuota;
      }
docs: Parses out the share quota value from a <code>java.net.HttpURLConnection</code>.
  
  @param request
  the request to get attributes from
  @return the share quota (in GB) or <code>null</code> if none is specified