}
        try (final ResponseData responseData = storageClient.doHead("storage://fess/dir1/")) {
            assertNull(responseData);
        }
        try (final ResponseData responseData = storageClient.doHead("storage://fess/dir1/dir2/")) {
            assertNull(responseData);
        }
        try (final ResponseData responseData = storageClient.doHead("storage://fess/dir3/")) {
            assertNull(responseData);
        }

        }
        try (final ResponseData responseData = s3Client.doHead("s3://fess/")) {
            assertNull(responseData);
        }
        try (final ResponseData responseData = s3Client.doHead("s3://fess/dir1/")) {
            assertNull(responseData);
        }
        try (final ResponseData responseData = s3Client.doHead("s3://fess/dir1/dir2/")) {
            assertNull(responseData);
        }

        }

        try (final ResponseData responseData = smbClient.doHead(baseUrl)) {
            assertNull(responseData);
        }
        try (final ResponseData responseData = smbClient.doHead(baseUrl + "dir1/")) {
            assertNull(responseData);
        }
        try (final ResponseData responseData = smbClient.doHead(baseUrl + "dir1/dir2/")) {
            assertNull(responseData);
        }

        }
        try (final ResponseData responseData = gcsClient.doHead("gcs://fess/dir1/")) {
            assertNull(responseData);
        }
        try (final ResponseData responseData = gcsClient.doHead("gcs://fess/dir1/dir2/")) {
            assertNull(responseData);
        }
        try (final ResponseData responseData = gcsClient.doHead("gcs://fess/dir3/")) {
            assertNull(responseData);
        }

        }

        try (final ResponseData responseData = smbClient.doHead(baseUrl)) {
            assertNull(responseData);
        }
        try (final ResponseData responseData = smbClient.doHead(baseUrl + "dir1/")) {
            assertNull(responseData);
        }
        try (final ResponseData responseData = smbClient.doHead(baseUrl + "dir1/dir2/")) {
            assertNull(responseData);
        }

        final CrawlerWebServer server = new CrawlerWebServer(7070);
        server.start();

        final String url = "http://localhost:7070/";
        try {
            final ResponseData responseData = httpClient.doHead(url);
            assertNotNull(responseData.getLastModified());
            assertTrue(responseData.getLastModified().getTime() < new Date().getTime());
        } finally {
            server.stop();
        }

     */
    @Override
    public ResponseData execute(final RequestData request) {
        return switch (request.getMethod()) {
        case GET -> doGet(request.getUrl());
        case HEAD -> doHead(request.getUrl());
        case POST -> doPost(request.getUrl());
        default -> throw new CrawlerSystemException(request.getMethod() + " method is not supported.");
        };
    }

    /**

        String path = file.getAbsolutePath();
        if (!path.startsWith("/")) {
            path = "/" + path.replace('\\', '/');
        }
        final ResponseData responseData = fsClient.doHead("file:" + path);
        assertNotNull(responseData.getLastModified());
        assertTrue(responseData.getLastModified().getTime() < new Date().getTime());
        assertNull(responseData.getResponseBody());
    }

            return responseData;
        }

        /*
         * (non-Javadoc)
         *
         * @see org.codelibs.fess.crawler.client.CrawlerClient#doHead(java.lang.String)
         */
        public ResponseData doHead(final String url) {
            final long now = SystemUtil.currentTimeMillis();
            if (now - previousTime < interval) {
                throw new IllegalStateException();

            params.put(FtpClient.FTP_AUTHENTICATIONS_PROPERTY, new FtpAuthentication[] { auth });
            ftpClient.setInitParameterMap(params);
            final ResponseData responseData = ftpClient.doHead("ftp://localhost:" + FTP_PORT + "/text1.txt");
            assertNotNull(responseData.getLastModified());
            assertTrue(responseData.getLastModified().getTime() < new Date().getTime());