org.elasticsearch.rest.BytesRestResponse Maven / Gradle / Ivy
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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.apache.logging.log4j.Logger;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.message.ParameterizedMessage;
import org.apache.logging.log4j.util.Supplier;
import org.elasticsearch.ElasticsearchException;
import org.elasticsearch.ElasticsearchStatusException;
import org.elasticsearch.ExceptionsHelper;
import org.elasticsearch.common.bytes.BytesArray;
import org.elasticsearch.common.bytes.BytesReference;
import org.elasticsearch.common.xcontent.ToXContent;
import org.elasticsearch.common.xcontent.XContentBuilder;
import org.elasticsearch.common.xcontent.XContentParser;
import java.io.IOException;
import static java.util.Collections.singletonMap;
import static org.elasticsearch.ElasticsearchException.REST_EXCEPTION_SKIP_STACK_TRACE;
import static org.elasticsearch.ElasticsearchException.REST_EXCEPTION_SKIP_STACK_TRACE_DEFAULT;
import static org.elasticsearch.common.xcontent.XContentParserUtils.ensureExpectedToken;
public class BytesRestResponse extends RestResponse {
public static final String TEXT_CONTENT_TYPE = "text/plain; charset=UTF-8";
private static final String STATUS = "status";
private final RestStatus status;
private final BytesReference content;
private final String contentType;
/**
* Creates a new response based on {@link XContentBuilder}.
*/
public BytesRestResponse(RestStatus status, XContentBuilder builder) {
this(status, builder.contentType().mediaType(), BytesReference.bytes(builder));
}
/**
* 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, Exception e) throws IOException {
this(channel, ExceptionsHelper.status(e), e);
}
public BytesRestResponse(RestChannel channel, RestStatus status, Exception e) throws IOException {
this.status = status;
try (XContentBuilder builder = build(channel, status, e)) {
this.content = BytesReference.bytes(builder);
this.contentType = builder.contentType().mediaType();
}
if (e instanceof ElasticsearchException) {
copyHeaders(((ElasticsearchException) e));
}
}
@Override
public String contentType() {
return this.contentType;
}
@Override
public BytesReference content() {
return this.content;
}
@Override
public RestStatus status() {
return this.status;
}
private static final Logger SUPPRESSED_ERROR_LOGGER = LogManager.getLogger("rest.suppressed");
private static XContentBuilder build(RestChannel channel, RestStatus status, Exception e) throws IOException {
ToXContent.Params params = channel.request();
if (params.paramAsBoolean("error_trace", !REST_EXCEPTION_SKIP_STACK_TRACE_DEFAULT)) {
params = new ToXContent.DelegatingMapParams(singletonMap(REST_EXCEPTION_SKIP_STACK_TRACE, "false"), params);
} else if (e != null) {
Supplier messageSupplier = () -> new ParameterizedMessage("path: {}, params: {}",
channel.request().rawPath(), channel.request().params());
if (status.getStatus() < 500) {
SUPPRESSED_ERROR_LOGGER.debug(messageSupplier, e);
} else {
SUPPRESSED_ERROR_LOGGER.warn(messageSupplier, e);
}
}
XContentBuilder builder = channel.newErrorBuilder().startObject();
ElasticsearchException.generateFailureXContent(builder, params, e, channel.detailedErrorsEnabled());
builder.field(STATUS, status.getStatus());
builder.endObject();
return builder;
}
static BytesRestResponse createSimpleErrorResponse(RestChannel channel, RestStatus status, String errorMessage) throws IOException {
return new BytesRestResponse(status, channel.newErrorBuilder().startObject()
.field("error", errorMessage)
.field("status", status.getStatus())
.endObject());
}
public static ElasticsearchStatusException errorFromXContent(XContentParser parser) throws IOException {
XContentParser.Token token = parser.nextToken();
ensureExpectedToken(XContentParser.Token.START_OBJECT, token, parser::getTokenLocation);
ElasticsearchException exception = null;
RestStatus status = null;
String currentFieldName = null;
while ((token = parser.nextToken()) != XContentParser.Token.END_OBJECT) {
if (token == XContentParser.Token.FIELD_NAME) {
currentFieldName = parser.currentName();
}
if (STATUS.equals(currentFieldName)) {
if (token != XContentParser.Token.FIELD_NAME) {
ensureExpectedToken(XContentParser.Token.VALUE_NUMBER, token, parser::getTokenLocation);
status = RestStatus.fromCode(parser.intValue());
}
} else {
exception = ElasticsearchException.failureFromXContent(parser);
}
}
if (exception == null) {
throw new IllegalStateException("Failed to parse elasticsearch status exception: no exception was found");
}
ElasticsearchStatusException result = new ElasticsearchStatusException(exception.getMessage(), status, exception.getCause());
for (String header : exception.getHeaderKeys()) {
result.addHeader(header, exception.getHeader(header));
}
for (String metadata : exception.getMetadataKeys()) {
result.addMetadata(metadata, exception.getMetadata(metadata));
}
return result;
}
}