if (size > 3) {
                return StringUtils.abbreviate(returnUrl, size);
            }
            return returnUrl;
        }
        return null;
    }

    public StreamResponse asContentResponse(final Map<String, Object> doc) {
        if (logger.isDebugEnabled()) {
            logger.debug("writing the content of: {}", doc);
        }
        final FessConfig fessConfig = ComponentUtil.getFessConfig();