code: protected URL buildURL(Map<String,String> headers, String instanceHostPort) throws MalformedURLException {
          String origUrl = headers.get(Listener.METAINFO_REQUEST_URL);
          if (origUrl == null || !origUrl.startsWith("http")) {
              // other protocol: forward to standard services url
              return new URL("http://" + instanceHostPort + "/" + getServicesRoot() + "/Services");
          }
          else {
              URL origHttpUrl = new URL(origUrl);
              String path = origHttpUrl.getPath();
              // Re-route from SOAP to REST since MDW only cares about message Payload, plus we no longer have the SOAP Envelope in the request
              if (path != null && (path.contains("/SOAP") || path.contains("/MDWWebService")))
                  path = "/" + getServicesRoot() + "/Services";
  
              String destUrl = origHttpUrl.getProtocol() + "://" + instanceHostPort + path;
              if (!StringHelper.isEmpty(headers.get(Listener.METAINFO_REQUEST_QUERY_STRING)))
                  destUrl += "?" + headers.get(Listener.METAINFO_REQUEST_QUERY_STRING);
              return new URL(destUrl);
          }
      }
docs: Override this to build the destination URL differently.