} else {
                hash = StringUtil.EMPTY;
            }
        } else {
            hash = StringUtil.EMPTY;
        }

        if (!isFileSystemPath(targetUrl)) {
            if (isValidRedirectUrl(targetUrl)) {
                return HtmlResponse.fromRedirectPathAsIs(DocumentUtil.encodeUrl(targetUrl + hash));
            } else {
                logger.warn("Invalid redirect URL detected: {}", targetUrl);