@Override
  public Response serve(File rootDir, IHTTPSession httpSession) {
    StringBuilder content = new StringBuilder();
    Map<String, Handler> handlerCache = RouteMaster.getHandlerCache();

    for (Iterator<String> iterator = handlerCache.keySet().iterator(); iterator.hasNext(); ) {
      String extension = iterator.next();
      Handler plugin = handlerCache.get(extension);

      content.append("<p> extension: <strong>.");
      content.append(extension);
      content.append("</strong> =&gt; ");
      content.append(plugin.getName());
      content.append("</p>");
    }

    return (HttpUtils.okResponse(content.toString()));
  }