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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF 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.apache.kafka.common.requests;
import org.apache.kafka.common.errors.InvalidRequestException;
import org.apache.kafka.common.message.ApiVersionsRequestData;
import org.apache.kafka.common.network.ClientInformation;
import org.apache.kafka.common.network.ListenerName;
import org.apache.kafka.common.network.Send;
import org.apache.kafka.common.protocol.ApiKeys;
import org.apache.kafka.common.security.auth.KafkaPrincipal;
import org.apache.kafka.common.security.auth.KafkaPrincipalSerde;
import org.apache.kafka.common.security.auth.SecurityProtocol;
import org.apache.kafka.server.authorizer.AuthorizableRequestContext;
import java.net.InetAddress;
import java.nio.ByteBuffer;
import java.util.Optional;
import static org.apache.kafka.common.protocol.ApiKeys.API_VERSIONS;
public class RequestContext implements AuthorizableRequestContext {
public final RequestHeader header;
public final String connectionId;
public final InetAddress clientAddress;
public final KafkaPrincipal principal;
public final ListenerName listenerName;
public final SecurityProtocol securityProtocol;
public final ClientInformation clientInformation;
public final boolean fromPrivilegedListener;
public final Optional principalSerde;
public RequestContext(RequestHeader header,
String connectionId,
InetAddress clientAddress,
KafkaPrincipal principal,
ListenerName listenerName,
SecurityProtocol securityProtocol,
ClientInformation clientInformation,
boolean fromPrivilegedListener) {
this(header,
connectionId,
clientAddress,
principal,
listenerName,
securityProtocol,
clientInformation,
fromPrivilegedListener,
Optional.empty());
}
public RequestContext(RequestHeader header,
String connectionId,
InetAddress clientAddress,
KafkaPrincipal principal,
ListenerName listenerName,
SecurityProtocol securityProtocol,
ClientInformation clientInformation,
boolean fromPrivilegedListener,
Optional principalSerde) {
this.header = header;
this.connectionId = connectionId;
this.clientAddress = clientAddress;
this.principal = principal;
this.listenerName = listenerName;
this.securityProtocol = securityProtocol;
this.clientInformation = clientInformation;
this.fromPrivilegedListener = fromPrivilegedListener;
this.principalSerde = principalSerde;
}
public RequestAndSize parseRequest(ByteBuffer buffer) {
if (isUnsupportedApiVersionsRequest()) {
// Unsupported ApiVersion requests are treated as v0 requests and are not parsed
ApiVersionsRequest apiVersionsRequest = new ApiVersionsRequest(new ApiVersionsRequestData(), (short) 0, header.apiVersion());
return new RequestAndSize(apiVersionsRequest, 0);
} else {
ApiKeys apiKey = header.apiKey();
try {
short apiVersion = header.apiVersion();
return AbstractRequest.parseRequest(apiKey, apiVersion, buffer);
} catch (Throwable ex) {
throw new InvalidRequestException("Error getting request for apiKey: " + apiKey +
", apiVersion: " + header.apiVersion() +
", connectionId: " + connectionId +
", listenerName: " + listenerName +
", principal: " + principal, ex);
}
}
}
/**
* Build a {@link Send} for direct transmission of the provided response
* over the network.
*/
public Send buildResponseSend(AbstractResponse body) {
return body.toSend(header.toResponseHeader(), apiVersion());
}
/**
* Serialize a response into a {@link ByteBuffer}. This is used when the response
* will be encapsulated in an {@link EnvelopeResponse}. The buffer will contain
* both the serialized {@link ResponseHeader} as well as the bytes from the response.
* There is no `size` prefix unlike the output from {@link #buildResponseSend(AbstractResponse)}.
*
* Note that envelope requests are reserved only for APIs which have set the
* {@link ApiKeys#forwardable} flag. Notably the `Fetch` API cannot be forwarded,
* so we do not lose the benefit of "zero copy" transfers from disk.
*/
public ByteBuffer buildResponseEnvelopePayload(AbstractResponse body) {
return body.serializeWithHeader(header.toResponseHeader(), apiVersion());
}
private boolean isUnsupportedApiVersionsRequest() {
return header.apiKey() == API_VERSIONS && !API_VERSIONS.isVersionSupported(header.apiVersion());
}
public short apiVersion() {
// Use v0 when serializing an unhandled ApiVersion response
if (isUnsupportedApiVersionsRequest())
return 0;
return header.apiVersion();
}
@Override
public String listenerName() {
return listenerName.value();
}
@Override
public SecurityProtocol securityProtocol() {
return securityProtocol;
}
@Override
public KafkaPrincipal principal() {
return principal;
}
@Override
public InetAddress clientAddress() {
return clientAddress;
}
@Override
public int requestType() {
return header.apiKey().id;
}
@Override
public int requestVersion() {
return header.apiVersion();
}
@Override
public String clientId() {
return header.clientId();
}
@Override
public int correlationId() {
return header.correlationId();
}
@Override
public String toString() {
return "RequestContext(" +
"header=" + header +
", connectionId='" + connectionId + '\'' +
", clientAddress=" + clientAddress +
", principal=" + principal +
", listenerName=" + listenerName +
", securityProtocol=" + securityProtocol +
", clientInformation=" + clientInformation +
", fromPrivilegedListener=" + fromPrivilegedListener +
", principalSerde=" + principalSerde +
')';
}
}
