static NanoHTTPD.Response serveFile_maxCache(File file) {
  ret serveFile(file, "application/octet-stream");
}

static NanoHTTPD.Response serveFile_maxCache(File file, S mimeType) ctex {
  ret maxCacheHeaders(NanoHTTPD.newFixedLengthResponse(NanoHTTPD.Status.OK, mimeType, new FileInputStream(file), file.length()));
}