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Elasticsearch subproject :server
/*
* 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.document;
import org.apache.logging.log4j.LogManager;
import org.elasticsearch.ResourceNotFoundException;
import org.elasticsearch.action.ActionRequestValidationException;
import org.elasticsearch.action.get.GetRequest;
import org.elasticsearch.action.get.GetResponse;
import org.elasticsearch.client.node.NodeClient;
import org.elasticsearch.common.bytes.BytesReference;
import org.elasticsearch.common.logging.DeprecationLogger;
import org.elasticsearch.common.xcontent.XContentBuilder;
import org.elasticsearch.common.xcontent.XContentHelper;
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.RestResponseListener;
import org.elasticsearch.search.fetch.subphase.FetchSourceContext;
import java.io.IOException;
import java.io.InputStream;
import static org.elasticsearch.rest.RestRequest.Method.GET;
import static org.elasticsearch.rest.RestRequest.Method.HEAD;
import static org.elasticsearch.rest.RestStatus.OK;
/**
* The REST handler for get source and head source APIs.
*/
public class RestGetSourceAction extends BaseRestHandler {
private static final DeprecationLogger deprecationLogger = new DeprecationLogger(LogManager.getLogger(RestGetSourceAction.class));
static final String TYPES_DEPRECATION_MESSAGE = "[types removal] Specifying types in get_source and exist_source"
+ "requests is deprecated.";
public RestGetSourceAction(final RestController controller) {
controller.registerHandler(GET, "/{index}/_source/{id}", this);
controller.registerHandler(HEAD, "/{index}/_source/{id}", this);
controller.registerHandler(GET, "/{index}/{type}/{id}/_source", this);
controller.registerHandler(HEAD, "/{index}/{type}/{id}/_source", this);
}
@Override
public String getName() {
return "document_get_source_action";
}
@Override
public RestChannelConsumer prepareRequest(final RestRequest request, final NodeClient client) throws IOException {
final GetRequest getRequest;
if (request.hasParam("type")) {
deprecationLogger.deprecatedAndMaybeLog("get_source_with_types", TYPES_DEPRECATION_MESSAGE);
getRequest = new GetRequest(request.param("index"), request.param("type"), request.param("id"));
} else {
getRequest = new GetRequest(request.param("index"), request.param("id"));
}
getRequest.refresh(request.paramAsBoolean("refresh", getRequest.refresh()));
getRequest.routing(request.param("routing"));
getRequest.preference(request.param("preference"));
getRequest.realtime(request.paramAsBoolean("realtime", getRequest.realtime()));
getRequest.fetchSourceContext(FetchSourceContext.parseFromRestRequest(request));
return channel -> {
if (getRequest.fetchSourceContext() != null && !getRequest.fetchSourceContext().fetchSource()) {
final ActionRequestValidationException validationError = new ActionRequestValidationException();
validationError.addValidationError("fetching source can not be disabled");
channel.sendResponse(new BytesRestResponse(channel, validationError));
} else {
client.get(getRequest, new RestGetSourceResponseListener(channel, request));
}
};
}
static class RestGetSourceResponseListener extends RestResponseListener {
private final RestRequest request;
RestGetSourceResponseListener(RestChannel channel, RestRequest request) {
super(channel);
this.request = request;
}
@Override
public RestResponse buildResponse(final GetResponse response) throws Exception {
checkResource(response);
final XContentBuilder builder = channel.newBuilder(request.getXContentType(), false);
final BytesReference source = response.getSourceInternal();
try (InputStream stream = source.streamInput()) {
builder.rawValue(stream, XContentHelper.xContentType(source));
}
return new BytesRestResponse(OK, builder);
}
/**
* Checks if the requested document or source is missing.
*
* @param response a response
* @throws ResourceNotFoundException if the document or source is missing
*/
private void checkResource(final GetResponse response) {
final String index = response.getIndex();
final String type = response.getType();
final String id = response.getId();
if (response.isExists() == false) {
throw new ResourceNotFoundException("Document not found [" + index + "]/[" + type + "]/[" + id + "]");
} else if (response.isSourceEmpty()) {
throw new ResourceNotFoundException("Source not found [" + index + "]/[" + type + "]/[" + id + "]");
}
}
}
}