return redirect(ErrorAction.class);
        }

        final StreamResponse response =
                asStream(DocumentUtil.getValue(doc, fessConfig.getIndexFieldDocId(), String.class)).contentType("text/html; charset=UTF-8")
                        .data(content.getBytes(Constants.CHARSET_UTF_8));
        response.headerContentDispositionInline(); // TODO will be fixed in lastaflute

        }
        final String indexFieldId = fessConfig.getIndexFieldId();
        final String indexFieldDocId = fessConfig.getIndexFieldDocId();
        final String indexFieldContentLength = fessConfig.getIndexFieldContentLength();
        final String indexFieldTitle = fessConfig.getIndexFieldTitle();