hash = StringUtil.EMPTY;
        }

        if (!isFileSystemPath(targetUrl)) {
            if (isValidRedirectUrl(targetUrl)) {
                return HtmlResponse.fromRedirectPathAsIs(DocumentUtil.encodeUrl(targetUrl + hash));
            } else {
                logger.warn("Invalid redirect URL detected: {}", targetUrl);
                saveError(messages -> messages.addErrorsDocumentNotFound(GLOBAL, form.docId));

        if (FUNCTION_ENCODEURL_MATCHER.equals(replacement)) {
            return (u, m) -> DocumentUtil.encodeUrl(u);
        }
        if (!replacement.startsWith(GROOVY_MATCHER)) {
            return (u, m) -> m.replaceAll(replacement);
        }
        final String template = replacement.substring(GROOVY_MATCHER.length());

            final String childUrlValue = attrValue.trim();
            final URI childUri = childUrlValue.startsWith("?") ? new URI(uri.toString() + childUrlValue) : uri.resolve(childUrlValue);
            final String u = encodeUrl(normalizeUrl(childUri.toString()), encoding);
            if (logger.isDebugEnabled()) {
                logger.debug("{} -> {}", attrValue, u);
            }
            if (StringUtil.isNotBlank(u)) {

            } catch (final ExecutionException e) {
                logger.debug("Failed to access resource hash cache: path={}", input, e);
            }
        }
        return LaResponseUtil.getResponse().encodeURL(sb.toString());
    }

    /**
     * Encodes a string for similar document hash processing.
     *
     * @param input the string to encode
     * @return encoded string, or the original input if blank

            final URI childUri = uri.resolve(resolveTarget);
            u = encodeUrl(normalizeUrl(childUri.toString()), encoding);
        } catch (final IllegalArgumentException e) {
            final int pos = urlValue.indexOf(':');
            if (pos > 0 && pos < 10) {
                u = encodeUrl(normalizeUrl(urlValue), encoding);
            }
        }

        if (u == null) {