if (StringUtil.isBlank(value)) {
                map = Collections.emptyMap();
            } else {
                final Set<String> keySet = new HashSet<>();
                map = split(value, "\n").get(stream -> stream.filter(StringUtil::isNotBlank).map(s -> {
                    final String[] pair = s.split("=");
                    if (pair.length == 1) {
                        return new Pair<>(StringUtil.EMPTY, pair[0].trim());

        // Add defensive null/blank checks
        if (StringUtil.isBlank(username) || StringUtil.isBlank(password)) {
            if (logger.isDebugEnabled()) {
                logger.debug("Login failed: username or password is blank");
            }
            return OptionalEntity.empty();
        }

        if (StringUtil.isBlank(fessConfig.getLdapProviderUrl()) || !validate()) {

            buf.append("text=");
            if (StringUtil.isNotBlank(prefix)) {
                buf.append(encodeToString(prefix)).append("-,");
            }
            buf.append(encodeToString(textStart));
            if (StringUtil.isNotBlank(textEnd)) {
                buf.append(',').append(encodeToString(textEnd));
            }
            if (StringUtil.isNotBlank(suffix)) {

            final StringBuilder docContext = new StringBuilder();
            docContext.append("[").append(index).append("] ");
            if (StringUtil.isNotBlank(title)) {
                docContext.append(sanitizeDocumentContent(title)).append("\n");
            }
            if (StringUtil.isNotBlank(url)) {
                docContext.append("URL: ").append(sanitizeDocumentContent(url)).append("\n");
            }

        if (StringUtil.isBlank(value)) {
            value = ComponentUtil.getFessConfig().getSystemProperty(AAD_DEFAULT_GROUPS);
        }
        if (StringUtil.isBlank(value)) {
            return Collections.emptyList();
        }
        return split(value, ",").get(stream -> stream.filter(StringUtil::isNotBlank).map(String::trim).collect(Collectors.toList()));
    }

                stream(crawlingConfig.getVirtualHosts()).get(stream -> stream.filter(StringUtil::isNotBlank).collect(Collectors.toList())));
        // id
        putResultDataBody(dataMap, fessConfig.getIndexFieldId(), crawlingInfoHelper.generateId(dataMap));
        // parentId
        String parentUrl = responseData.getParentUrl();
        if (StringUtil.isNotBlank(parentUrl)) {

                        final String userCode = userInfoHelper.getUserCode();

                        if (StringUtil.isBlank(userCode)) {
                            throw new WebApiException(HttpServletResponse.SC_BAD_REQUEST, "No user session.");
                        }
                        if (StringUtil.isBlank(favoriteUrl)) {
                            throw new WebApiException(HttpServletResponse.SC_BAD_REQUEST, "URL is null.");

            ChatSearchResult searchResult;
            if (intentResult.getIntent() == ChatIntent.SUMMARY && StringUtil.isNotBlank(intentResult.getDocumentUrl())) {
                searchResult = searchByUrl(intentResult.getDocumentUrl());
            } else {
                final String query = StringUtil.isBlank(intentResult.getQuery()) ? userMessage : intentResult.getQuery();