static NanoHTTPD.Response serveHTML(S text) {
  ret NanoHTTPD.newFixedLengthResponse(String.valueOf(text));
}

static NanoHTTPD.Response serveHTML(StringBuilder buf) {
  ret NanoHTTPD.newFixedLengthResponse(buf.toString());
}

static NanoHTTPD.Response serveHTML(StringBuffer buf) {
  ret NanoHTTPD.newFixedLengthResponse(buf.toString());
}