}

    private void doHandshake() throws IOException {
        connect();
        try {
            int response = parseResponseCode();
            if (response != HTTP_UNAUTHORIZED && response != HTTP_PROXY_AUTH) {
                return;
            }
            Type1Message type1 = (Type1Message) attemptNegotiation(response);
            if (type1 == null) return; // no NTLM
            int attempt = 0;

    /** The key of the configuration. e.g.  */
    String HTTP_PROXY_HOST = "http.proxy.host";

    /** The key of the configuration. e.g. 8080 */
    String HTTP_PROXY_PORT = "http.proxy.port";

    /** The key of the configuration. e.g.  */
    String HTTP_PROXY_USERNAME = "http.proxy.username";

    /** The key of the configuration. e.g.  */
    String HTTP_PROXY_PASSWORD = "http.proxy.password";

    private void doHandshake () throws IOException, GeneralSecurityException {
        connect();
        try {
            int response = parseResponseCode();
            if ( response != HTTP_UNAUTHORIZED && response != HTTP_PROXY_AUTH ) {
                return;
            }
            NtlmMessage type1 = attemptNegotiation(response);
            if ( type1 == null )
                return; // no NTLM
            int attempt = 0;

    public static final String PURGE_JOB_LOG_DAY_PROPERTY = "purge.joblog.day";

    public static final String PURGE_BY_BOTS_PROPERTY = "purge.by.bots";

    public static final String SEARCH_FILE_PROXY_PROPERTY = "search.file.proxy";

    public static final String NOTIFICATION_TO_PROPERTY = "notification.to";

    public static final String SLACK_WEBHOOK_URLS_PROPERTY = "slack.webhook.urls";

        setSystemProperty(key, Integer.toString(value));
    }

    default boolean isSearchFileProxyEnabled() {
        return getSystemPropertyAsBoolean(Constants.SEARCH_FILE_PROXY_PROPERTY, true);
    }

    default boolean isBrowserLocaleForSearchUsed() {
        return getSystemPropertyAsBoolean(Constants.USE_BROWSER_LOCALE_FOR_SEARCH_PROPERTY, false);
    }