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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;
import org.elasticsearch.ElasticsearchException;
import org.elasticsearch.ExceptionsHelper;
import org.elasticsearch.bootstrap.Elasticsearch;
import org.elasticsearch.common.bytes.BytesArray;
import org.elasticsearch.common.bytes.BytesReference;
import org.elasticsearch.common.collect.Tuple;
import org.elasticsearch.common.logging.ESLogger;
import org.elasticsearch.common.logging.ESLoggerFactory;
import org.elasticsearch.common.xcontent.ToXContent;
import org.elasticsearch.common.xcontent.XContentBuilder;
import java.io.IOException;
import java.util.Collections;
public class BytesRestResponse extends RestResponse {
public static final String TEXT_CONTENT_TYPE = "text/plain; charset=UTF-8";
private final RestStatus status;
private final BytesReference content;
private final String contentType;
public BytesRestResponse(RestStatus status) {
this(status, TEXT_CONTENT_TYPE, BytesArray.EMPTY);
}
/**
* Creates a new response based on {@link XContentBuilder}.
*/
public BytesRestResponse(RestStatus status, XContentBuilder builder) {
this(status, builder.contentType().restContentType(), builder.bytes());
}
/**
* Creates a new plain text response.
*/
public BytesRestResponse(RestStatus status, String content) {
this(status, TEXT_CONTENT_TYPE, new BytesArray(content));
}
/**
* Creates a new plain text response.
*/
public BytesRestResponse(RestStatus status, String contentType, String content) {
this(status, contentType, new BytesArray(content));
}
/**
* Creates a binary response.
*/
public BytesRestResponse(RestStatus status, String contentType, byte[] content) {
this(status, contentType, new BytesArray(content));
}
/**
* Creates a binary response.
*/
public BytesRestResponse(RestStatus status, String contentType, BytesReference content) {
this.status = status;
this.content = content;
this.contentType = contentType;
}
public BytesRestResponse(RestChannel channel, Throwable t) throws IOException {
this(channel, ExceptionsHelper.status(t), t);
}
public BytesRestResponse(RestChannel channel, RestStatus status, Throwable t) throws IOException {
this.status = status;
if (channel.request().method() == RestRequest.Method.HEAD) {
this.content = BytesArray.EMPTY;
this.contentType = TEXT_CONTENT_TYPE;
} else {
XContentBuilder builder = convert(channel, status, t);
this.content = builder.bytes();
this.contentType = builder.contentType().restContentType();
}
if (t instanceof ElasticsearchException) {
copyHeaders(((ElasticsearchException) t));
}
}
@Override
public String contentType() {
return this.contentType;
}
@Override
public BytesReference content() {
return this.content;
}
@Override
public RestStatus status() {
return this.status;
}
private static final ESLogger SUPPRESSED_ERROR_LOGGER = ESLoggerFactory.getLogger("rest.suppressed");
private static XContentBuilder convert(RestChannel channel, RestStatus status, Throwable t) throws IOException {
XContentBuilder builder = channel.newErrorBuilder().startObject();
if (t == null) {
builder.field("error", "unknown");
} else if (channel.detailedErrorsEnabled()) {
final ToXContent.Params params;
if (channel.request().paramAsBoolean("error_trace", !ElasticsearchException.REST_EXCEPTION_SKIP_STACK_TRACE_DEFAULT)) {
params = new ToXContent.DelegatingMapParams(Collections.singletonMap(ElasticsearchException.REST_EXCEPTION_SKIP_STACK_TRACE, "false"), channel.request());
} else {
SUPPRESSED_ERROR_LOGGER.info("{} Params: {}", t, channel.request().path(), channel.request().params());
params = channel.request();
}
builder.field("error");
builder.startObject();
final ElasticsearchException[] rootCauses = ElasticsearchException.guessRootCauses(t);
builder.field("root_cause");
builder.startArray();
for (ElasticsearchException rootCause : rootCauses){
builder.startObject();
rootCause.toXContent(builder, new ToXContent.DelegatingMapParams(Collections.singletonMap(ElasticsearchException.REST_EXCEPTION_SKIP_CAUSE, "true"), params));
builder.endObject();
}
builder.endArray();
ElasticsearchException.toXContent(builder, params, t);
builder.endObject();
} else {
builder.field("error", simpleMessage(t));
}
builder.field("status", status.getStatus());
builder.endObject();
return builder;
}
/*
* Builds a simple error string from the message of the first ElasticsearchException
*/
private static String simpleMessage(Throwable t) throws IOException {
int counter = 0;
Throwable next = t;
while (next != null && counter++ < 10) {
if (t instanceof ElasticsearchException) {
return next.getClass().getSimpleName() + "[" + next.getMessage() + "]";
}
next = next.getCause();
}
return "No ElasticsearchException found";
}
}
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