code: public static ArchiveReader get(final URL u, final long offset)
      throws IOException {
      	return ArchiveReaderFactory.factory.getArchiveReader(u, offset);
      }
docs: Get an Archive Reader aligned at <code>offset</code>.
  This version of get will not bring the file local but will try to
  stream across the net making an HTTP 1.1 Range request on remote
  http server (RFC1435 Section 14.35).
  @param u HTTP URL for an Archive file.
  @param offset Offset into file at which to start fetching.
  @return An ArchiveReader aligned at offset.
  @throws IOException