code: private void sendBuffer(final HttpResponseStatus status,
                            final ChannelBuffer buf) {
      final String contentType = (api_version < 1 ? guessMimeType(buf) :
        serializer.responseContentType());
      sendBuffer(status, buf, contentType);
    }
docs: Sends an HTTP reply to the client.
  @param status The status of the request (e.g. 200 OK or 404 Not Found).
  @param buf The content of the reply to send.