}
        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 = 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);
        }

        return charset;
    }

    /*
     * (non-Javadoc)
     *
     * @see org.codelibs.fess.crawler.client.CrawlerClient#doHead(java.lang.String)
     */
    @Override
    public ResponseData doHead(final String url) {
        try {
            final ResponseData responseData = processRequest(url, false);
            responseData.setMethod(Constants.HEAD_METHOD);

        return charset;
    }

    /*
     * (non-Javadoc)
     *
     * @see org.codelibs.fess.crawler.client.CrawlerClient#doHead(java.lang.String)
     */
    @Override
    public ResponseData doHead(final String url) {
        try {
            final ResponseData responseData = processRequest(url, false);
            responseData.setMethod(Constants.HEAD_METHOD);

            json={
                "id": 9000,
                "name": "Dead Pond",
                "age": 30,
                "secret_name": "Dive Wilson",
            },
        )
        assert response.status_code == 200, response.text
        assert response.json() == snapshot(
            {"age": 30, "id": IsInt(), "name": "Dead Pond"}
        )
        assert response.json()["id"] != 9000, (

            json={
                "id": 999,
                "name": "Dead Pond",
                "age": 30,
                "secret_name": "Dive Wilson",
            },
        )
        assert response.status_code == 200, response.text
        assert response.json() == snapshot(
            {"age": 30, "secret_name": "Dive Wilson", "id": 999, "name": "Dead Pond"}
        )

        # Read a hero

    }

    /**
     * Executes a HEAD request for the given URL.
     * @param url The URL to request.
     * @return The ResponseData.
     */
    @Override
    public ResponseData doHead(final String url) {
        try {
            final ResponseData responseData = processRequest(url, false);
            responseData.setMethod(Constants.HEAD_METHOD);
            return responseData;

    }

    /**
     * Executes a HEAD request for the given URL.
     * @param url The URL to request.
     * @return The ResponseData.
     */
    @Override
    public ResponseData doHead(final String url) {
        try {
            final ResponseData responseData = processRequest(url, false);
            responseData.setMethod(Constants.HEAD_METHOD);
            return responseData;

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