io.undertow.server.protocol.ajp.AjpServerRequestConduit 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).
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/*
* 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.server.protocol.ajp;
import static org.xnio.Bits.anyAreSet;
import static org.xnio.Bits.longBitMask;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.channels.ClosedChannelException;
import java.nio.channels.FileChannel;
import java.util.concurrent.TimeUnit;
import io.undertow.UndertowMessages;
import io.undertow.conduits.ConduitListener;
import io.undertow.server.Connectors;
import io.undertow.server.HttpServerExchange;
import io.undertow.server.RequestTooBigException;
import io.undertow.util.ImmediatePooledByteBuffer;
import org.xnio.IoUtils;
import org.xnio.channels.StreamSinkChannel;
import org.xnio.conduits.AbstractStreamSourceConduit;
import org.xnio.conduits.ConduitReadableByteChannel;
import org.xnio.conduits.StreamSourceConduit;
/**
* Underlying AJP request channel.
*
* @author Stuart Douglas
*/
public class AjpServerRequestConduit extends AbstractStreamSourceConduit {
private static final ByteBuffer READ_BODY_CHUNK;
static {
ByteBuffer readBody = ByteBuffer.allocateDirect(7);
readBody.put((byte) 'A');
readBody.put((byte) 'B');
readBody.put((byte) 0);
readBody.put((byte) 3);
readBody.put((byte) 6);
readBody.put((byte) 0x1F);
readBody.put((byte) 0xFA);
readBody.flip();
READ_BODY_CHUNK = readBody;
}
private static final int HEADER_LENGTH = 6;
/**
* There is a packet coming from apache.
*/
private static final long STATE_READING = 1L << 63L;
/**
* There is no packet coming, as we need to set a GET_BODY_CHUNK message
*/
private static final long STATE_SEND_REQUIRED = 1L << 62L;
/**
* read is done
*/
private static final long STATE_FINISHED = 1L << 61L;
/**
* The remaining bits are used to store the remaining chunk size.
*/
private static final long STATE_MASK = longBitMask(0, 60);
private final HttpServerExchange exchange;
private final AjpServerResponseConduit ajpResponseConduit;
/**
* byte buffer that is used to hold header data
*/
private final ByteBuffer headerBuffer = ByteBuffer.allocateDirect(HEADER_LENGTH);
private final ConduitListener finishListener;
/**
/**
* The total amount of remaining data. If this is unknown it is -1.
*/
private long remaining;
/**
* State flags, with the chunk remaining stored in the low bytes
*/
private long state;
/**
* The total amount of data that has been read
*/
private long totalRead;
public AjpServerRequestConduit(final StreamSourceConduit delegate, HttpServerExchange exchange, AjpServerResponseConduit ajpResponseConduit, Long size, ConduitListener finishListener) {
super(delegate);
this.exchange = exchange;
this.ajpResponseConduit = ajpResponseConduit;
this.finishListener = finishListener;
if (size == null) {
state = STATE_SEND_REQUIRED;
remaining = -1;
} else if (size.longValue() == 0L) {
state = STATE_FINISHED;
remaining = 0;
} else {
state = STATE_READING;
remaining = size;
}
}
@Override
public long transferTo(long position, long count, FileChannel target) throws IOException {
try {
return target.transferFrom(new ConduitReadableByteChannel(this), position, count);
} catch (IOException | RuntimeException e) {
IoUtils.safeClose(exchange.getConnection());
throw e;
}
}
@Override
public long transferTo(long count, ByteBuffer throughBuffer, StreamSinkChannel target) throws IOException {
try {
return IoUtils.transfer(new ConduitReadableByteChannel(this), count, throughBuffer, target);
} catch (IOException | RuntimeException e) {
IoUtils.safeClose(exchange.getConnection());
throw e;
}
}
@Override
public void terminateReads() throws IOException {
if(exchange.isPersistent() && anyAreSet(state, STATE_FINISHED)) {
return;
}
super.terminateReads();
}
@Override
public long read(ByteBuffer[] dsts, int offset, int length) throws IOException {
try {
long total = 0;
for (int i = offset; i < length; ++i) {
while (dsts[i].hasRemaining()) {
int r = read(dsts[i]);
if (r <= 0 && total > 0) {
return total;
} else if (r <= 0) {
return r;
} else {
total += r;
}
}
}
return total;
} catch (IOException | RuntimeException e) {
IoUtils.safeClose(exchange.getConnection());
throw e;
}
}
@Override
public int read(ByteBuffer dst) throws IOException {
try {
long state = this.state;
if (anyAreSet(state, STATE_FINISHED)) {
return -1;
} else if (anyAreSet(state, STATE_SEND_REQUIRED)) {
state = this.state = (state & STATE_MASK) | STATE_READING;
if (ajpResponseConduit.isWriteShutdown()) {
this.state = STATE_FINISHED;
if (finishListener != null) {
finishListener.handleEvent(this);
}
return -1;
}
if (!ajpResponseConduit.doGetRequestBodyChunk(READ_BODY_CHUNK.duplicate(), this)) {
return 0;
}
}
//we might have gone into state_reading above
if (anyAreSet(state, STATE_READING)) {
return doRead(dst, state);
}
assert STATE_FINISHED == state;
return -1;
} catch (RequestTooBigException e) {
throw e;
} catch (IOException | RuntimeException e) {
IoUtils.safeClose(exchange.getConnection());
throw e;
}
}
private int doRead(final ByteBuffer dst, long state) throws IOException {
ByteBuffer headerBuffer = this.headerBuffer;
long headerRead = HEADER_LENGTH - headerBuffer.remaining();
long remaining = this.remaining;
if (remaining == 0) {
this.state = STATE_FINISHED;
if (finishListener != null) {
finishListener.handleEvent(this);
}
return -1;
}
long chunkRemaining;
if (headerRead != HEADER_LENGTH) {
int read = next.read(headerBuffer);
if (read == -1) {
this.state = STATE_FINISHED;
if (finishListener != null) {
finishListener.handleEvent(this);
}
throw new ClosedChannelException();
} else if (headerBuffer.hasRemaining()) {
if(headerBuffer.remaining() <= 2) {
//mod_jk can send 12 34 00 00 rather than 12 34 00 02 00 00
byte b1 = headerBuffer.get(0); //0x12
byte b2 = headerBuffer.get(1); //0x34
if (b1 != 0x12 || b2 != 0x34) {
throw UndertowMessages.MESSAGES.wrongMagicNumber((b1 & 0xFF) << 8 | (b2 & 0xFF));
}
b1 = headerBuffer.get(2);//the length headers, two more than the string length header
b2 = headerBuffer.get(3);
int totalSize = ((b1 & 0xFF) << 8) | (b2 & 0xFF);
if(totalSize == 0) {
if(headerBuffer.remaining() < 2) {
byte[] data = new byte[1];
ByteBuffer bb = ByteBuffer.wrap(data);
bb.put(headerBuffer.get(4));
bb.flip();
Connectors.ungetRequestBytes(exchange, new ImmediatePooledByteBuffer(bb));
}
this.remaining = 0;
this.state = STATE_FINISHED;
if (finishListener != null) {
finishListener.handleEvent(this);
}
return -1;
}
}
return 0;
} else {
headerBuffer.flip();
byte b1 = headerBuffer.get(); //0x12
byte b2 = headerBuffer.get(); //0x34
if (b1 != 0x12 || b2 != 0x34) {
throw UndertowMessages.MESSAGES.wrongMagicNumber((b1 & 0xFF) << 8 | (b2 & 0xFF));
}
b1 = headerBuffer.get();//the length headers, two more than the string length header
b2 = headerBuffer.get();
int totalSize = ((b1 & 0xFF) << 8) | (b2 & 0xFF);
if(totalSize == 0) {
byte[] data = new byte[2];
ByteBuffer bb = ByteBuffer.wrap(data);
bb.put(headerBuffer);
bb.flip();
Connectors.ungetRequestBytes(exchange, new ImmediatePooledByteBuffer(bb));
this.remaining = 0;
this.state = STATE_FINISHED;
if (finishListener != null) {
finishListener.handleEvent(this);
}
return -1;
}
b1 = headerBuffer.get();
b2 = headerBuffer.get();
chunkRemaining = ((b1 & 0xFF) << 8) | (b2 & 0xFF);
if (chunkRemaining == 0) {
this.remaining = 0;
this.state = STATE_FINISHED;
if (finishListener != null) {
finishListener.handleEvent(this);
}
return -1;
}
}
} else {
chunkRemaining = this.state & STATE_MASK;
}
int limit = dst.limit();
Throwable originalException = null;
int returnValue = 0;
try {
if (dst.remaining() > chunkRemaining) {
dst.limit((int) (dst.position() + chunkRemaining));
}
int read = next.read(dst);
chunkRemaining -= read;
if (remaining != -1) {
remaining -= read;
}
this.totalRead += read;
if (remaining != 0) {
if (chunkRemaining == 0) {
headerBuffer.clear();
this.state = STATE_SEND_REQUIRED;
} else {
this.state = (state & ~STATE_MASK) | chunkRemaining;
}
}
returnValue = read;
} catch (Throwable t) {
originalException = t;
} finally {
Throwable suppressed = originalException; //OK to be null
try {
this.remaining = remaining;
dst.limit(limit);
final long maxEntitySize = exchange.getMaxEntitySize();
if (maxEntitySize > 0) {
if (totalRead > maxEntitySize) {
//kill the connection, nothing else can be sent on it
terminateReads();
exchange.setPersistent(false);
suppressed = UndertowMessages.MESSAGES.requestEntityWasTooLarge(maxEntitySize);
if(originalException != null) {
originalException.addSuppressed(suppressed);
suppressed = originalException;
}
}
}
} catch (Throwable t) {
if (suppressed != null) {
suppressed.addSuppressed(t);
} else {
suppressed = t;
}
}
if (suppressed != null) {
if (suppressed instanceof RuntimeException) {
throw (RuntimeException) suppressed;
}
if (suppressed instanceof Error) {
throw (Error) suppressed;
}
if (suppressed instanceof IOException) {
throw (IOException) suppressed;
}
}
}
return returnValue;
}
@Override
public void awaitReadable() throws IOException {
try {
if (anyAreSet(state, STATE_READING)) {
next.awaitReadable();
}
} catch (IOException | RuntimeException e) {
IoUtils.safeClose(exchange.getConnection());
throw e;
}
}
@Override
public void awaitReadable(long time, TimeUnit timeUnit) throws IOException {
try {
if (anyAreSet(state, STATE_READING)) {
next.awaitReadable(time, timeUnit);
}
} catch (IOException | RuntimeException e) {
IoUtils.safeClose(exchange.getConnection());
throw e;
}
}
/**
* Method that is called when an error occurs writing out read body chunk frames
* @param e
*/
void setReadBodyChunkError(IOException e) {
IoUtils.safeClose(exchange.getConnection());
if(isReadResumed()) {
wakeupReads();
}
}
}