try {
            final ActionResponse actionResponse = ssoManager.getResponse(SsoResponseType.METADATA);
            if (actionResponse == null) {
                throw responseManager.new400("Unsupported request type.");
            }
            return actionResponse;
        } catch (final SsoMessageException e) {
            if (e.getCause() == null) {
                if (logger.isDebugEnabled()) {

            // 404
            throw responseManager.new404("Thumbnail for " + form.docId + " is not found.");
        }

        final File thumbnailFile = thumbnailManager.getThumbnailFile(doc);
        if (thumbnailFile == null) {
            if (fessConfig.isThumbnailEnabled()) {
                thumbnailManager.offer(doc);
            }
            // 404

     *
     * @return the stream response
     */
    public StreamResponse asStream() {
        if (osddFile == null) {
            throw ComponentUtil.getResponseManager().new404("Unsupported Open Search Description Document response.");
        }

        return new StreamResponse(osddFile.getName()).contentType(contentType + "; charset=" + encoding).stream(out -> {

ua52e\u0000\u20005\u0000\u4000\u05e2\u0000\u4000\u0b9a\u0000\u4000\u1170\u0000\u4000\u1395\u0000\u4000\ue3e3\u0000\u8000\ue01d\u0000\u8000\ue3e7\u0000\u8000\ue3ec\u0000\u8000\ue3f0\u0000\u8000\ue037\u0000\u8000\ue3f4\u0000\u8000\ue3fb\u0000\u8000\ue400\u0000\u8000\ue404\u0000\u8000\ue406\u0000\u4000\ue409\u0000\u4000\ue40d\u0000\u4000\ue037\u0000\u4000\ue410\u0000\u4000\ue413\u0000\u4000\ue417\u0000\u4000\ue41e\u0000\u4000\ue423\u0000\u4000\ue428\u0000\u4000\ue42c\u0000\u4000\ue431\u0000\u4000\u...