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/*
* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch licenses this file to you under
* the Apache License, Version 2.0 (the "License"); you may
* not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.elasticsearch.rest.action.get;
import org.elasticsearch.action.get.GetRequest;
import org.elasticsearch.action.get.GetResponse;
import org.elasticsearch.client.Client;
import org.elasticsearch.common.Strings;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.rest.BaseRestHandler;
import org.elasticsearch.rest.BytesRestResponse;
import org.elasticsearch.rest.RestChannel;
import org.elasticsearch.rest.RestController;
import org.elasticsearch.rest.RestRequest;
import org.elasticsearch.rest.RestResponse;
import org.elasticsearch.rest.action.support.RestResponseListener;
import static org.elasticsearch.rest.RestRequest.Method.HEAD;
import static org.elasticsearch.rest.RestStatus.NOT_FOUND;
import static org.elasticsearch.rest.RestStatus.OK;
/**
*
*/
public class RestHeadAction extends BaseRestHandler {
@Inject
public RestHeadAction(Settings settings, RestController controller, Client client) {
super(settings, client);
controller.registerHandler(HEAD, "/{index}/{type}/{id}", this);
controller.registerHandler(HEAD, "/{index}/{type}/{id}/_source", this);
}
@Override
public void handleRequest(final RestRequest request, final RestChannel channel, final Client client) {
final GetRequest getRequest = new GetRequest(request.param("index"), request.param("type"), request.param("id"));
getRequest.operationThreaded(true);
getRequest.refresh(request.paramAsBoolean("refresh", getRequest.refresh()));
getRequest.routing(request.param("routing")); // order is important, set it after routing, so it will set the routing
getRequest.parent(request.param("parent"));
getRequest.preference(request.param("preference"));
getRequest.realtime(request.paramAsBoolean("realtime", null));
// don't get any fields back...
getRequest.fields(Strings.EMPTY_ARRAY);
// TODO we can also just return the document size as Content-Length
client.get(getRequest, new RestResponseListener<GetResponse>(channel) {
@Override
public RestResponse buildResponse(GetResponse response) {
if (!response.isExists()) {
return new BytesRestResponse(NOT_FOUND);
} else {
return new BytesRestResponse(OK);
}
}
});
}
}
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