default boolean isHtmlMimetypeForCache(final String mimetype) {
        final String[] mimetypes = getCrawlerDocumentCacheHtmlMimetypes().split(",");
        if (mimetypes.length == 1 && StringUtil.isBlank(mimetypes[0])) {
            return true;
        }
        return stream(mimetypes).get(stream -> stream.anyMatch(s -> s.equalsIgnoreCase(mimetype)));
    }

    String getCrawlerDocumentCacheSupportedMimetypes();

index.field.created=created
# Field name for timestamp in the index.
index.field.timestamp=timestamp
# Field name for label in the index.
index.field.label=label
# Field name for MIME type in the index.
index.field.mimetype=mimetype
# Field name for parent ID in the index.
index.field.parent_id=parent_id
# Field name for important content in the index.
index.field.important_content=important_content
# Field name for content in the index.

    /** The key of the configuration. e.g. text/html */
    String CRAWLER_DOCUMENT_CACHE_SUPPORTED_MIMETYPES = "crawler.document.cache.supported.mimetypes";

    /** The key of the configuration. e.g. text/html */
    String CRAWLER_DOCUMENT_CACHE_HTML_MIMETYPES = "crawler.document.cache.html.mimetypes";

    /** The key of the configuration. e.g. true */
    String INDEXER_THREAD_DUMP_ENABLED = "indexer.thread.dump.enabled";

            }

            Object mimeType = docMap.get("mimetype");
            if (mimeType == null) {
                return false;
            }

            String mimeTypeStr = mimeType.toString();
            // Support PDF and common image formats
            return "application/pdf".equals(mimeTypeStr) || "image/jpeg".equals(mimeTypeStr) || "image/png".equals(mimeTypeStr);
        }

        @Override

        final String mimeType;
        if (response instanceof HtmlResponse) {
            mimeType = "text/html";
        } else if (response instanceof JsonResponse) {
            mimeType = "application/json";
        } else if (response instanceof XmlResponse) {
            mimeType = "text/xml";
        } else if (response instanceof StreamResponse) {
            mimeType = "application/octet-stream";

     *
     * @param mimetype the MIME type to map (e.g., "application/pdf")
     * @param filetype the file type classification (e.g., "pdf")
     */
    public void add(final String mimetype, final String filetype) {
        mimetypeMap.put(mimetype, filetype);
    }

    /**
     * Retrieves the file type for a given MIME type.
     *
     * @param mimetype the MIME type to look up

        assertArgumentNotEmpty("path", path);

        final InputStream is = ResourceUtil.getResourceAsStream(path);
        try {
            final String mimetype = URLConnection.guessContentTypeFromStream(is);
            if (mimetype != null) {
                return mimetype;
            }
            return URLConnection.guessContentTypeFromName(path);
        } catch (final IOException e) {
            throw new IORuntimeException(e);

        stream(config.getPermissions()).of(stream -> stream.forEach(p -> roleTypeList.add(p)));
        defaultDataMap.put(fessConfig.getIndexFieldRole(), roleTypeList);
        // mimetype
        defaultDataMap.put(fessConfig.getIndexFieldMimetype(), mimeType);
        // title
        // content
        // cache
        // digest
        // host
        // site
        // url
        // anchor

        putResultDataBody(dataMap, fessConfig.getIndexFieldAnchor(), StringUtil.EMPTY);
        // mimetype
        putResultDataBody(dataMap, fessConfig.getIndexFieldMimetype(), mimeType);
        if (fileTypeHelper != null) {
            // filetype
            putResultDataBody(dataMap, fessConfig.getIndexFieldFiletype(), fileTypeHelper.get(mimeType));
        }
        // content_length

     */
    protected boolean isImageMimeType(final ResponseData responseData) {
        final String mimeType = responseData.getMimeType();
        if (mimeType == null) {
            return true;
        }

        return switch (mimeType) {
        case "image/png", "image/gif", "image/jpeg", "image/bmp" -> true;
        default -> false;
        };
    }

    /**