private Map executeHTTP(Map data_to_send, boolean v6) throws Exception {

    if (v6 && !enable_v6) {

      throw (new Exception("IPv6 is disabled"));
    }

    String host = getHost(v6, HTTP_SERVER_ADDRESS_V6, HTTP_SERVER_ADDRESS_V4);

    if (Logger.isEnabled())
      Logger.log(
          new LogEvent(
              LOGID,
              "VersionCheckClient retrieving "
                  + "version information from "
                  + host
                  + ":"
                  + HTTP_SERVER_PORT
                  + " via HTTP"));

    String url_str =
        "http://"
            + (v6 ? UrlUtils.convertIPV6Host(host) : host)
            + (HTTP_SERVER_PORT == 80 ? "" : (":" + HTTP_SERVER_PORT))
            + "/version?";

    url_str +=
        URLEncoder.encode(new String(BEncoder.encode(data_to_send), "ISO-8859-1"), "ISO-8859-1");

    URL url = new URL(url_str);

    HttpURLConnection url_connection = (HttpURLConnection) url.openConnection();

    url_connection.connect();

    try {
      InputStream is = url_connection.getInputStream();

      Map reply = BDecoder.decode(new BufferedInputStream(is));

      preProcessReply(reply, v6);

      return (reply);

    } finally {

      url_connection.disconnect();
    }
  }
  private String getHTTPGetString(Map content, boolean for_proxy, boolean v6) {
    String host = getHost(v6, HTTP_SERVER_ADDRESS_V6, HTTP_SERVER_ADDRESS_V4);

    String get_str =
        "GET "
            + (for_proxy
                ? ("http://"
                    + (v6 ? UrlUtils.convertIPV6Host(host) : host)
                    + ":"
                    + HTTP_SERVER_PORT)
                : "")
            + "/version?";

    try {
      get_str +=
          URLEncoder.encode(new String(BEncoder.encode(content), "ISO-8859-1"), "ISO-8859-1");

    } catch (Throwable e) {
    }

    get_str += " HTTP/1.1" + "\015\012" + "\015\012";

    return (get_str);
  }