final String mimeType = responseData.getMimeType();
        if (logger.isDebugEnabled()) {
            logger.debug("mimeType: {}", mimeType);
        }
        if (mimeType == null) {
            response.contentTypeOctetStream();
            return;
        }
        if (mimeType.startsWith("text/")) {
            final String charset = responseData.getCharSet();

        }
        return buf.toString();
    }

    /**
     * Sets the MIME type.
     * @param mimeType The MIME type.
     */
    public void setMimeType(final String mimeType) {
        this.mimeType = mimeType;
    }

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

    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.delete.timeout=3m
# Timeout for index health checks.
index.health.timeout=10m
# Timeout for index indices operations.
index.indices.timeout=1m

# filetype

# Mapping of MIME types to filetype labels for indexing.
index.filetype=\
text/html=html\n\
application/msword=word\n\
application/vnd.openxmlformats-officedocument.wordprocessingml.document=word\n\
application/vnd.ms-excel=excel\n\

ransport(function(i){var o,a;if(le.cors||Qt&&!i.crossDomain)return{send:function(e,t){var n,r=i.xhr();if(r.open(i.type,i.url,i.async,i.username,i.password),i.xhrFields)for(n in i.xhrFields)r[n]=i.xhrFields[n];for(n in i.mimeType&&r.overrideMimeType&&r.overrideMimeType(i.mimeType),i.crossDomain||e["X-Requested-With"]||(e["X-Requested-With"]="XMLHttpRequest"),e)r.setRequestHeader(n,e[n]);o=function(e){return function(){o&&(o=a=r.onload=r.onerror=r.onabort=r.ontimeout=r.onreadystatechange=null,"abo...

ransport(function(i){var o,a;if(le.cors||Qt&&!i.crossDomain)return{send:function(e,t){var n,r=i.xhr();if(r.open(i.type,i.url,i.async,i.username,i.password),i.xhrFields)for(n in i.xhrFields)r[n]=i.xhrFields[n];for(n in i.mimeType&&r.overrideMimeType&&r.overrideMimeType(i.mimeType),i.crossDomain||e["X-Requested-With"]||(e["X-Requested-With"]="XMLHttpRequest"),e)r.setRequestHeader(n,e[n]);o=function(e){return function(){o&&(o=a=r.onload=r.onerror=r.onabort=r.ontimeout=r.onreadystatechange=null,"abo...

     * @param userMessage the user's message
     * @param userId the user ID (can be null for anonymous users)
     * @param fields the field filters (e.g., label)
     * @param extraQueries the extra query filters (e.g., filetype, timestamp)
     * @return the chat response including session info and sources
     */
    public ChatResult chat(final String sessionId, final String userMessage, final String userId, final Map<String, String[]> fields,