public static byte[] loadBinaryPage(URLConnection con) throws IOException {
    //setHeaders(con);
    ByteArrayOutputStream buf = new ByteArrayOutputStream();
    InputStream inputStream = con.getInputStream();
    int n = 0;
    while (true) {
      int ch = inputStream.read();
      if (ch < 0)
        break;
      buf.write(ch);
      if (++n % 100000 == 0)
        System.err.println("  " + n + " bytes loaded.");
    }
    inputStream.close();
    return buf.toByteArray();
  }