url = "file:/" + encodeUrl("ホーム") + "/user";
        exp = "localhost";
        assertEquals(exp, transformer.getHostOnFile(url));

        url = "file:/c:/" + encodeUrl("ホーム") + "/user";
        exp = "localhost";
        assertEquals(exp, transformer.getHostOnFile(url));

        url = "file:////" + encodeUrl("サーバー") + "/home/user";
        exp = "サーバー";

        assertEquals("test#value", DocumentUtil.encodeUrl("test#value"));
    }

    public void test_encodeUrl_already_encoded() {
        assertEquals("hello", DocumentUtil.encodeUrl("hello"));
        assertEquals("hello-world", DocumentUtil.encodeUrl("hello-world"));
        assertEquals("hello_world", DocumentUtil.encodeUrl("hello_world"));

    </jsp:include>

    <div class="content-wrapper position-relative">
        <iframe class="w-100 h-100 position-absolute" frameborder="0"
                src="<%=request.getContextPath()%>${serverPath}<%= response.encodeURL("/_plugin/kopf/") %>"
                seamless></iframe>
    </div>

    <jsp:include page="/WEB-INF/view/common/admin/footer.jsp"></jsp:include>
</div>

        assertEquals(result, htmlTransformer.encodeUrl(url, "UTF-8"));

        url = ".-*_:/+%=&?#[]@~!$'(),;";
        result = ".-*_:/+%=&?#[]@~!$'(),;";
        assertEquals(result, htmlTransformer.encodeUrl(url, "UTF-8"));
    }

    public void test_isSupportedCharset_valid() {

            }
        } else {
            hash = StringUtil.EMPTY;
        }

        if (!isFileSystemPath(targetUrl)) {
            return HtmlResponse.fromRedirectPathAsIs(DocumentUtil.encodeUrl(targetUrl + hash));
        }
        if (!fessConfig.isSearchFileProxyEnabled()) {
            return HtmlResponse.fromRedirectPathAsIs(targetUrl + hash);
        }

        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());

     *
     * @param url the URL to encode
     * @return the encoded URL with non-URL-safe characters properly encoded
     */
    public static String encodeUrl(final String url) {
        final String enc = LaRequestUtil.getOptionalRequest()
                .filter(req -> req.getCharacterEncoding() != null)
                .map(HttpServletRequest::getCharacterEncoding)

            final URL childUrl =
                    childUrlValue.startsWith("?") ? new URL(url.toExternalForm() + childUrlValue) : new URL(url, childUrlValue);
            final String u = encodeUrl(normalizeUrl(childUrl.toExternalForm()), encoding);
            if (logger.isDebugEnabled()) {
                logger.debug("{} -> {}", attrValue, u);
            }
            if (StringUtil.isNotBlank(u)) {

  integrity sha512-MSjYzcWNOA0ewAHpz0MxpYFvwg6yjy1NG3xteoqz644VCo/RPgnr1/GGt+ic3iJTzQ8Eu3TdM14SawnVUmGE6A==

encodeurl@~1.0.2:
  version "1.0.2"
  resolved "https://registry.yarnpkg.com/encodeurl/-/encodeurl-1.0.2.tgz#ad3ff4c86ec2d029322f5a02c3a9a606c95b3f59"
  integrity sha512-TPJXq8JqFaVYm2CWmPvnP2Iyo4ZSM7/QKcSmuMLDObfpH5fi7RUGmd/rTDf+rut/saiDiQEeVTNgAmJEdAOx0w==

        }

        @Override
        public boolean containsHeader(String name) {
            return false;
        }

        @Override
        public String encodeURL(String url) {
            return url;
        }

        @Override
        public String encodeRedirectURL(String url) {
            return url;
        }

        @Override