source.setGoUrl(buildGoUrl(contextPath, source.getDocId(), queryId, requestedTime, i));
            assistantMessage.addSource(source);
        }
    }

    /**
     * Populates the url_link field in the document map if not already present.
     *
     * @param doc the document map
     */
    protected void populateUrlLink(final Map<String, Object> doc) {

response.field.content_title=content_title
# Field name for content description in the response.
response.field.content_description=content_description
# Field name for URL link in the response.
response.field.url_link=url_link
# Field name for site path in the response.
response.field.site_path=site_path
# Maximum length of content title in the response.
response.max.title.length=50
# Maximum length of site path in the response.

            }
            if (size >= 0) {
                return site;
            }
        }
        final Object urlLink = docMap.get(fessConfig.getResponseFieldUrlLink());
        if (urlLink != null) {
            final String returnUrl;
            final String url = urlLink.toString();
            if (LOCAL_PATH_PATTERN.matcher(url).find() || SHARED_FOLDER_PATTERN.matcher(url).find()) {