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)));
    }

crawler.document.cache.enabled=true
# Maximum size (bytes) for document cache.
crawler.document.cache.max.size=2621440
# Supported MIME types for document cache.
crawler.document.cache.supported.mimetypes=text/html

    /** 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";