assertEquals("b17816944bb30c19cb3265480470288caaa93e36666527a57ca94d8a8b8d7b80",
                userInfoHelper.createUserCodeFromUserId("******@****.***"));
        assertEquals("41ebbef035e6cebb9d0cf6b98266d9335abd454718a3b172efa30635ef19f1cc",
                userInfoHelper.createUserCodeFromUserId("!\"#$%&'()'\\^-=,./_?><+*}{`P@[]"));

        if (StringUtil.isBlank(userCode)) {
            return null;
        }

        userCode = createUserCodeFromUserId(userCode);
        request.setAttribute(Constants.USER_CODE, userCode);
        deleteUserCodeFromCookie(request);
        return userCode;
    }

    protected String createUserCodeFromUserId(String userCode) {
        final FessConfig fessConfig = ComponentUtil.getFessConfig();