/** The key of the configuration. e.g.  */
    String API_JSON_RESPONSE_HEADERS = "api.json.response.headers";

    /** The key of the configuration. e.g. false */
    String API_JSON_RESPONSE_EXCEPTION_INCLUDED = "api.json.response.exception.included";

    /** The key of the configuration. e.g.  */
    String API_GSA_RESPONSE_HEADERS = "api.gsa.response.headers";

    /** The key of the configuration. e.g. false */

        this.maxEsStatusRetry = maxEsStatusRetry;
    }

    @Override
    public Client filterWithHeader(final Map<String, String> headers) {
        return client.filterWithHeader(headers);
    }

    @Override
    public <Request extends ActionRequest, Response extends ActionResponse> ActionFuture<Response> execute(

"statusCode","requestHeaders","requestHeadersNames","strAbort","getResponseHeader","getAllResponseHeaders","setRequestHeader","overrideMimeType","mimeType","status","abort","statusText","finalText","crossDomain","host","hasContent","ifModified","headers","beforeSend","success","send","nativeStatusText","responses","isSuccess","response","modified","ct","finalDataType","firstDataType","ajaxHandleResponses","conv2","current","conv","dataFilter","throws","ajaxConvert","getJSON","getScript","text sc...

api.search.accept.referers=
api.search.scroll=false
api.json.response.headers=
api.json.response.exception.included=false
api.gsa.response.headers=
api.gsa.response.exception.included=false
api.dashboard.response.headers=
api.cors.allow.origin=*
api.cors.allow.methods=GET, POST, OPTIONS, DELETE, PUT
api.cors.max.age=3600
api.cors.allow.headers=Origin, Content-Type, Accept, Authorization, X-Requested-With

                        .collect(Collectors.groupingBy(Pair::getFirst, Collectors.mapping(Pair::getSecond, Collectors.toList())));
                appendJson("headers", requestHeaderMap, buf);
                buf.append('}');
                buf.append('\n');
                try {
                    writer.write(buf.toString());
                } catch (final IOException e) {

        httpResponse.addHeader(ACCESS_CONTROL_ALLOW_ORIGIN, origin);
        httpResponse.addHeader(ACCESS_CONTROL_ALLOW_METHODS, fessConfig.getApiCorsAllowMethods());
        httpResponse.addHeader(ACCESS_CONTROL_ALLOW_HEADERS, fessConfig.getApiCorsAllowHeaders());
        httpResponse.addHeader(ACCESS_CONTROL_MAX_AGE, fessConfig.getApiCorsMaxAge());
        httpResponse.addHeader(ACCESS_CONTROL_ALLOW_CREDENTIALS, fessConfig.getApiCorsAllowCredentials());

                        result.getSearchFieldLogList().add(new Pair<>(e.getKey(), e.getValue().toString()));
                    }
                });
            }
            final Object headersObj = source.get("headers");
            if (headersObj instanceof Map) {
                ((Map<String, ?>) headersObj).entrySet().stream().forEach(e -> {
                    if (e.getValue() instanceof String[]) {

    String QUERY_DEFAULT_LANGUAGES = "queryDefaultLanguages";

    String HTML_PROXY = "httpProxy";

    String CRAWLER_FAILURE_URL_STATUS_CODES = "crawlerFailureUrlStatusCodes";

    String VIRTUAL_HOST_HEADERS = "virtualHostHeaders";

    String QUERY_COLLAPSE_INNER_HITS_SORTS = "queryCollapseInnerHitsSorts";

    String USER_CODE_PATTERN = "userCodePattern";

tType||t.contentType)&&T.setRequestHeader("Content-Type",y.contentType),T.setRequestHeader("Accept",y.dataTypes[0]&&y.accepts[y.dataTypes[0]]?y.accepts[y.dataTypes[0]]+("*"!==y.dataTypes[0]?", "+It+"; q=0.01":""):y.accepts["*"]),y.headers)T.setRequestHeader(i,y.headers[i]);if(y.beforeSend&&(!1===y.beforeSend.call(v,T,y)||h))return T.abort();if(u="abort",b.add(y.complete),T.done(y.success),T.fail(y.error),c=$t(Mt,y,t,T)){if(T.readyState=1,g&&m.trigger("ajaxSend",[T,y]),h)return T;y.async&&0<y.tim...

        final Map<String, List<String>> headerMap = headerList.stream()
                .collect(Collectors.groupingBy(Pair::getFirst, Collectors.mapping(Pair::getSecond, Collectors.toList())));
        sourceMap.put("headers", headerMap);
        sourceMap.put("documents", documentList);
        return sourceMap;
    }

    @Override