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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.search;
import org.elasticsearch.ElasticsearchParseException;
import org.elasticsearch.action.search.MultiSearchRequest;
import org.elasticsearch.action.search.SearchRequest;
import org.elasticsearch.action.support.IndicesOptions;
import org.elasticsearch.client.node.NodeClient;
import org.elasticsearch.common.Strings;
import org.elasticsearch.common.bytes.BytesReference;
import org.elasticsearch.common.collect.Tuple;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.xcontent.XContent;
import org.elasticsearch.common.xcontent.XContentParser;
import org.elasticsearch.common.xcontent.XContentType;
import org.elasticsearch.index.query.QueryParseContext;
import org.elasticsearch.rest.BaseRestHandler;
import org.elasticsearch.rest.RestController;
import org.elasticsearch.rest.RestRequest;
import org.elasticsearch.rest.action.RestToXContentListener;
import org.elasticsearch.search.builder.SearchSourceBuilder;
import java.io.IOException;
import java.util.Collections;
import java.util.Map;
import java.util.Set;
import java.util.function.BiConsumer;
import static org.elasticsearch.common.xcontent.support.XContentMapValues.nodeBooleanValue;
import static org.elasticsearch.common.xcontent.support.XContentMapValues.nodeStringArrayValue;
import static org.elasticsearch.common.xcontent.support.XContentMapValues.nodeStringValue;
import static org.elasticsearch.rest.RestRequest.Method.GET;
import static org.elasticsearch.rest.RestRequest.Method.POST;
public class RestMultiSearchAction extends BaseRestHandler {
private static final Set<String> RESPONSE_PARAMS = Collections.singleton(RestSearchAction.TYPED_KEYS_PARAM);
private final boolean allowExplicitIndex;
public RestMultiSearchAction(Settings settings, RestController controller) {
super(settings);
controller.registerHandler(GET, "/_msearch", this);
controller.registerHandler(POST, "/_msearch", this);
controller.registerHandler(GET, "/{index}/_msearch", this);
controller.registerHandler(POST, "/{index}/_msearch", this);
controller.registerHandler(GET, "/{index}/{type}/_msearch", this);
controller.registerHandler(POST, "/{index}/{type}/_msearch", this);
this.allowExplicitIndex = MULTI_ALLOW_EXPLICIT_INDEX.get(settings);
}
@Override
public String getName() {
return "msearch_action";
}
@Override
public RestChannelConsumer prepareRequest(final RestRequest request, final NodeClient client) throws IOException {
MultiSearchRequest multiSearchRequest = parseRequest(request, allowExplicitIndex);
return channel -> client.multiSearch(multiSearchRequest, new RestToXContentListener<>(channel));
}
/**
* Parses a {@link RestRequest} body and returns a {@link MultiSearchRequest}
*/
public static MultiSearchRequest parseRequest(RestRequest restRequest, boolean allowExplicitIndex) throws IOException {
MultiSearchRequest multiRequest = new MultiSearchRequest();
if (restRequest.hasParam("max_concurrent_searches")) {
multiRequest.maxConcurrentSearchRequests(restRequest.paramAsInt("max_concurrent_searches", 0));
}
parseMultiLineRequest(restRequest, multiRequest.indicesOptions(), allowExplicitIndex, (searchRequest, parser) -> {
try {
final QueryParseContext queryParseContext = new QueryParseContext(parser);
searchRequest.source(SearchSourceBuilder.fromXContent(queryParseContext));
multiRequest.add(searchRequest);
} catch (IOException e) {
throw new ElasticsearchParseException("Exception when parsing search request", e);
}
});
return multiRequest;
}
/**
* Parses a multi-line {@link RestRequest} body, instantiating a {@link SearchRequest} for each line and applying the given consumer.
*/
public static void parseMultiLineRequest(RestRequest request, IndicesOptions indicesOptions, boolean allowExplicitIndex,
BiConsumer<SearchRequest, XContentParser> consumer) throws IOException {
String[] indices = Strings.splitStringByCommaToArray(request.param("index"));
String[] types = Strings.splitStringByCommaToArray(request.param("type"));
String searchType = request.param("search_type");
String routing = request.param("routing");
final Tuple<XContentType, BytesReference> sourceTuple = request.contentOrSourceParam();
final XContent xContent = sourceTuple.v1().xContent();
final BytesReference data = sourceTuple.v2();
int from = 0;
int length = data.length();
byte marker = xContent.streamSeparator();
while (true) {
int nextMarker = findNextMarker(marker, from, data, length);
if (nextMarker == -1) {
break;
}
// support first line with \n
if (nextMarker == 0) {
from = nextMarker + 1;
continue;
}
SearchRequest searchRequest = new SearchRequest();
if (indices != null) {
searchRequest.indices(indices);
}
if (indicesOptions != null) {
searchRequest.indicesOptions(indicesOptions);
}
if (types != null && types.length > 0) {
searchRequest.types(types);
}
if (routing != null) {
searchRequest.routing(routing);
}
if (searchType != null) {
searchRequest.searchType(searchType);
}
IndicesOptions defaultOptions = IndicesOptions.strictExpandOpenAndForbidClosed();
// now parse the action
if (nextMarker - from > 0) {
try (XContentParser parser = xContent.createParser(request.getXContentRegistry(), data.slice(from, nextMarker - from))) {
Map<String, Object> source = parser.map();
for (Map.Entry<String, Object> entry : source.entrySet()) {
Object value = entry.getValue();
if ("index".equals(entry.getKey()) || "indices".equals(entry.getKey())) {
if (!allowExplicitIndex) {
throw new IllegalArgumentException("explicit index in multi search is not allowed");
}
searchRequest.indices(nodeStringArrayValue(value));
} else if ("type".equals(entry.getKey()) || "types".equals(entry.getKey())) {
searchRequest.types(nodeStringArrayValue(value));
} else if ("search_type".equals(entry.getKey()) || "searchType".equals(entry.getKey())) {
searchRequest.searchType(nodeStringValue(value, null));
} else if ("request_cache".equals(entry.getKey()) || "requestCache".equals(entry.getKey())) {
searchRequest.requestCache(nodeBooleanValue(value, entry.getKey()));
} else if ("preference".equals(entry.getKey())) {
searchRequest.preference(nodeStringValue(value, null));
} else if ("routing".equals(entry.getKey())) {
searchRequest.routing(nodeStringValue(value, null));
}
}
defaultOptions = IndicesOptions.fromMap(source, defaultOptions);
}
}
searchRequest.indicesOptions(defaultOptions);
// move pointers
from = nextMarker + 1;
// now for the body
nextMarker = findNextMarker(marker, from, data, length);
if (nextMarker == -1) {
break;
}
BytesReference bytes = data.slice(from, nextMarker - from);
try (XContentParser parser = xContent.createParser(request.getXContentRegistry(), bytes)) {
consumer.accept(searchRequest, parser);
}
// move pointers
from = nextMarker + 1;
}
}
@Override
public boolean supportsContentStream() {
return true;
}
private static int findNextMarker(byte marker, int from, BytesReference data, int length) {
for (int i = from; i < length; i++) {
if (data.get(i) == marker) {
return i;
}
}
return -1;
}
@Override
protected Set<String> responseParams() {
return RESPONSE_PARAMS;
}
}
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