io.undertow.protocols.ajp.AjpClientChannel Maven / Gradle / Ivy
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* 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;
}
}
}
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