io.undertow.protocols.ajp.AjpClientChannel Maven / Gradle / Ivy
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This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including
all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and
JMS BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up
with different versions on classes on the class path).
/*
* JBoss, Home of Professional Open Source.
* Copyright 2014 Red Hat, Inc., and individual contributors
* as indicated by the @author tags.
*
* Licensed 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 io.undertow.protocols.ajp;
import io.undertow.UndertowLogger;
import io.undertow.UndertowMessages;
import io.undertow.client.ClientConnection;
import io.undertow.connector.ByteBufferPool;
import io.undertow.connector.PooledByteBuffer;
import io.undertow.server.protocol.framed.AbstractFramedChannel;
import io.undertow.server.protocol.framed.AbstractFramedStreamSourceChannel;
import io.undertow.server.protocol.framed.FrameHeaderData;
import io.undertow.util.Attachable;
import io.undertow.util.HeaderMap;
import io.undertow.util.HttpString;
import org.xnio.ChannelExceptionHandler;
import org.xnio.ChannelListener;
import org.xnio.ChannelListeners;
import org.xnio.IoUtils;
import org.xnio.OptionMap;
import org.xnio.StreamConnection;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.channels.ClosedChannelException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
import java.util.concurrent.TimeUnit;
import static io.undertow.protocols.ajp.AjpConstants.FRAME_TYPE_CPONG;
import static io.undertow.protocols.ajp.AjpConstants.FRAME_TYPE_END_RESPONSE;
import static io.undertow.protocols.ajp.AjpConstants.FRAME_TYPE_REQUEST_BODY_CHUNK;
import static io.undertow.protocols.ajp.AjpConstants.FRAME_TYPE_SEND_BODY_CHUNK;
import static io.undertow.protocols.ajp.AjpConstants.FRAME_TYPE_SEND_HEADERS;
/**
* AJP client side channel.
*
* @author Stuart Douglas
*/
public class AjpClientChannel extends AbstractFramedChannel {
private final AjpResponseParser ajpParser;
private AjpClientResponseStreamSourceChannel source;
private AjpClientRequestClientStreamSinkChannel sink;
private final List pingListeners = new ArrayList<>();
boolean sinkDone = true;
boolean sourceDone = true;
private boolean lastFrameSent;
private boolean lastFrameReceived;
/**
* Create a new {@link io.undertow.server.protocol.framed.AbstractFramedChannel}
* 8
*
* @param connectedStreamChannel The {@link org.xnio.channels.ConnectedStreamChannel} over which the WebSocket Frames should get send and received.
* Be aware that it already must be "upgraded".
* @param bufferPool The {@link org.xnio.Pool} which will be used to acquire {@link java.nio.ByteBuffer}'s from.
*/
public AjpClientChannel(StreamConnection connectedStreamChannel, ByteBufferPool bufferPool, OptionMap settings) {
super(connectedStreamChannel, bufferPool, AjpClientFramePriority.INSTANCE, null, settings);
ajpParser = new AjpResponseParser();
}
@Override
protected AbstractAjpClientStreamSourceChannel createChannel(FrameHeaderData frameHeaderData, PooledByteBuffer frameData) throws IOException {
if (frameHeaderData instanceof SendHeadersResponse) {
SendHeadersResponse h = (SendHeadersResponse) frameHeaderData;
AjpClientResponseStreamSourceChannel sourceChannel = new AjpClientResponseStreamSourceChannel(this, h.headers, h.statusCode, h.reasonPhrase, frameData, (int) frameHeaderData.getFrameLength());
this.source = sourceChannel;
return sourceChannel;
} else if (frameHeaderData instanceof RequestBodyChunk) {
RequestBodyChunk r = (RequestBodyChunk) frameHeaderData;
this.sink.chunkRequested(r.getLength());
frameData.close();
return null;
} else if (frameHeaderData instanceof CpongResponse) {
synchronized (pingListeners) {
for(ClientConnection.PingListener i : pingListeners) {
try {
i.acknowledged();
} catch (Throwable t) {
UndertowLogger.ROOT_LOGGER.debugf("Exception notifying ping listener", t);
}
}
pingListeners.clear();
}
return null;
} else {
frameData.close();
throw new RuntimeException("TODO: unknown frame");
}
}
@Override
protected FrameHeaderData parseFrame(ByteBuffer data) throws IOException {
ajpParser.parse(data);
if (ajpParser.isComplete()) {
try {
AjpResponseParser parser = ajpParser;
if (parser.prefix == FRAME_TYPE_SEND_HEADERS) {
return new SendHeadersResponse(parser.statusCode, parser.reasonPhrase, parser.headers);
} else if (parser.prefix == FRAME_TYPE_REQUEST_BODY_CHUNK) {
return new RequestBodyChunk(parser.readBodyChunkSize);
} else if (parser.prefix == FRAME_TYPE_SEND_BODY_CHUNK) {
return new SendBodyChunk(parser.currentIntegerPart + 1); //+1 for the null terminator
} else if (parser.prefix == FRAME_TYPE_END_RESPONSE) {
boolean persistent = parser.currentIntegerPart != 0;
if (!persistent) {
lastFrameReceived = true;
lastFrameSent = true;
}
return new EndResponse();
} else if (parser.prefix == FRAME_TYPE_CPONG) {
return new CpongResponse();
} else {
UndertowLogger.ROOT_LOGGER.debug("UNKOWN FRAME");
}
} finally {
ajpParser.reset();
}
}
return null;
}
public AjpClientRequestClientStreamSinkChannel sendRequest(final HttpString method, final String path, final HttpString protocol, final HeaderMap headers, final Attachable attachable, ChannelListener finishListener) {
if (!sinkDone || !sourceDone) {
throw UndertowMessages.MESSAGES.ajpRequestAlreadyInProgress();
}
sinkDone = false;
sourceDone = false;
AjpClientRequestClientStreamSinkChannel ajpClientRequestStreamSinkChannel = new AjpClientRequestClientStreamSinkChannel(this, finishListener, headers, path, method, protocol, attachable);
sink = ajpClientRequestStreamSinkChannel;
source = null;
return ajpClientRequestStreamSinkChannel;
}
@Override
protected boolean isLastFrameReceived() {
return lastFrameReceived;
}
@Override
protected boolean isLastFrameSent() {
return lastFrameSent;
}
protected void lastDataRead() {
if(!lastFrameSent) {
markReadsBroken(new ClosedChannelException());
markWritesBroken(new ClosedChannelException());
}
lastFrameReceived = true;
lastFrameSent = true;
IoUtils.safeClose(this);
}
@Override
protected void handleBrokenSourceChannel(Throwable e) {
}
@Override
protected void handleBrokenSinkChannel(Throwable e) {
}
@Override
protected void closeSubChannels() {
IoUtils.safeClose(source, sink);
}
@Override
protected Collection> getReceivers() {
if(source == null) {
return Collections.emptyList();
}
return Collections.>singleton(source);
}
protected OptionMap getSettings() {
return super.getSettings();
}
void sinkDone() {
sinkDone = true;
if (sourceDone) {
sink = null;
source = null;
}
}
void sourceDone() {
sourceDone = true;
if (sinkDone) {
sink = null;
source = null;
} else {
sink.startDiscard();
}
}
@Override
public boolean isOpen() {
return super.isOpen() && !lastFrameSent && !lastFrameReceived;
}
@Override
protected synchronized void recalculateHeldFrames() throws IOException {
super.recalculateHeldFrames();
}
public void sendPing(ClientConnection.PingListener pingListener, long timeout, TimeUnit timeUnit) {
AjpClientCPingStreamSinkChannel pingChannel = new AjpClientCPingStreamSinkChannel(this);
try {
pingChannel.shutdownWrites();
if (!pingChannel.flush()) {
pingChannel.getWriteSetter().set(ChannelListeners.flushingChannelListener(null, new ChannelExceptionHandler() {
@Override
public void handleException(AbstractAjpClientStreamSinkChannel channel, IOException exception) {
pingListener.failed(exception);
synchronized (pingListeners) {
pingListeners.remove(pingListener);
}
}
}));
pingChannel.resumeWrites();
}
} catch (IOException e) {
pingListener.failed(e);
return;
}
synchronized (pingListeners) {
pingListeners.add(pingListener);
}
getIoThread().executeAfter(() -> {
synchronized (pingListeners) {
if(pingListeners.contains(pingListener)) {
pingListeners.remove(pingListener);
pingListener.failed(UndertowMessages.MESSAGES.pingTimeout());
}
}
}, timeout, timeUnit);
}
class SendHeadersResponse implements FrameHeaderData {
private final int statusCode;
private final String reasonPhrase;
private final HeaderMap headers;
SendHeadersResponse(int statusCode, String reasonPhrase, HeaderMap headers) {
this.statusCode = statusCode;
this.reasonPhrase = reasonPhrase;
this.headers = headers;
}
@Override
public long getFrameLength() {
//zero
return 0;
}
@Override
public AbstractFramedStreamSourceChannel getExistingChannel() {
return null;
}
}
class RequestBodyChunk implements FrameHeaderData {
private final int length;
RequestBodyChunk(int length) {
this.length = length;
}
public int getLength() {
return length;
}
@Override
public long getFrameLength() {
return 0;
}
@Override
public AbstractFramedStreamSourceChannel getExistingChannel() {
return null;
}
}
class SendBodyChunk implements FrameHeaderData {
private final int length;
SendBodyChunk(int length) {
this.length = length;
}
@Override
public long getFrameLength() {
return length;
}
@Override
public AbstractFramedStreamSourceChannel getExistingChannel() {
return source;
}
}
class EndResponse implements FrameHeaderData {
@Override
public long getFrameLength() {
return 0;
}
@Override
public AbstractFramedStreamSourceChannel getExistingChannel() {
return source;
}
}
class CpongResponse implements FrameHeaderData {
@Override
public long getFrameLength() {
return 0;
}
@Override
public AbstractFramedStreamSourceChannel getExistingChannel() {
return null;
}
}
}