protected void writeErrorPage(
        HttpServletRequest request, Writer writer, int code, String message, boolean showStacks)
        throws IOException {
      writer.write("{ error: '" + code + "'}");
    }
Provides HTTP(s) communication to the system via Jetty.
extensions/transport/portability-transport-jettyrest/src/main/java/org/datatransferproject/transport/jettyrest/http/JettyTransport.java