}
        }

        // user agent
        final String userAgent = paramMap.get(CRAWLER_USERAGENT);
        if (StringUtil.isNotBlank(userAgent)) {
            factoryParamMap.put(HcHttpClient.USER_AGENT_PROPERTY, userAgent);
        }

        // web auth
        final String webAuthStr = paramMap.get(CRAWLER_WEB_AUTH);