code: public void handleDirectRequest(HttpServerExchange exchange) {
          Log.Info(this,"direct link path:"+exchange.getRelativePath());
          exchange.setResponseCode(200);
          exchange.getResponseHeaders().put(Headers.CONTENT_TYPE, "text/html; charset=utf-8");
          exchange.getResponseSender().send( "Hello there, "+exchange.getRequestPath() );
      }
docs: inlink e.g. from a mail sent ..
  @param exchange