if (StringUtil.isBlank(s) || Constants.NTLM.equals(s)) {
            s = AuthScope.ANY_SCHEME;
        }

        return new AuthScope(getHostname(), p, r, s);
    }

    private Credentials getCredentials() {
        if (StringUtil.isEmpty(getUsername())) {
            throw new CrawlerSystemException("username is empty.");
        }

        if (Constants.NTLM.equals(getProtocolScheme())) {