io.undertow.conduits.InflatingStreamSourceConduit 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.conduits;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.channels.ClosedChannelException;
import java.nio.channels.FileChannel;
import java.util.zip.DataFormatException;
import java.util.zip.Inflater;
import org.xnio.Buffers;
import org.xnio.IoUtils;
import org.xnio.channels.StreamSinkChannel;
import org.xnio.conduits.AbstractStreamSourceConduit;
import org.xnio.conduits.ConduitReadableByteChannel;
import org.xnio.conduits.StreamSourceConduit;
import io.undertow.UndertowLogger;
import io.undertow.connector.PooledByteBuffer;
import io.undertow.server.ConduitWrapper;
import io.undertow.server.HttpServerExchange;
import io.undertow.util.ConduitFactory;
import io.undertow.util.NewInstanceObjectPool;
import io.undertow.util.ObjectPool;
import io.undertow.util.PooledObject;
import io.undertow.util.SimpleObjectPool;
/**
* @author Stuart Douglas
*/
public class InflatingStreamSourceConduit extends AbstractStreamSourceConduit {
public static final ConduitWrapper WRAPPER = new ConduitWrapper() {
@Override
public StreamSourceConduit wrap(ConduitFactory factory, HttpServerExchange exchange) {
return new InflatingStreamSourceConduit(exchange, factory.create());
}
};
private volatile Inflater inflater;
private final PooledObject pooledObject;
private final HttpServerExchange exchange;
private PooledByteBuffer compressed;
private PooledByteBuffer uncompressed;
private boolean nextDone = false;
private boolean headerDone = false;
public InflatingStreamSourceConduit(HttpServerExchange exchange, StreamSourceConduit next) {
this(exchange, next, newInstanceInflaterPool());
}
public InflatingStreamSourceConduit(
HttpServerExchange exchange,
StreamSourceConduit next,
ObjectPool inflaterPool) {
super(next);
this.exchange = exchange;
this.pooledObject = inflaterPool.allocate();
this.inflater = pooledObject.getObject();
}
public static ObjectPool newInstanceInflaterPool() {
return new NewInstanceObjectPool<>(() -> new Inflater(true), Inflater::end);
}
public static ObjectPool simpleInflaterPool(int poolSize) {
return new SimpleObjectPool<>(poolSize, () -> new Inflater(true), Inflater::reset, Inflater::end);
}
@Override
public int read(ByteBuffer dst) throws IOException {
if (isReadShutdown()) {
throw new ClosedChannelException();
}
if (uncompressed != null) {
int ret = Buffers.copy(dst, uncompressed.getBuffer());
if (!uncompressed.getBuffer().hasRemaining()) {
uncompressed.close();
uncompressed = null;
}
return ret;
}
for(;;) {
if (compressed == null && !nextDone) {
compressed = exchange.getConnection().getByteBufferPool().getArrayBackedPool().allocate();
ByteBuffer buf = compressed.getBuffer();
int res = next.read(buf);
if (res == -1) {
nextDone = true;
compressed.close();
compressed = null;
} else if (res == 0) {
compressed.close();
compressed = null;
return 0;
} else {
buf.flip();
if (!headerDone) {
headerDone = readHeader(buf);
}
inflater.setInput(buf.array(), buf.arrayOffset() + buf.position(), buf.remaining());
}
}
if (nextDone && inflater.needsInput() && !inflater.finished()) {
throw UndertowLogger.ROOT_LOGGER.unexpectedEndOfCompressedInput();
} else if (nextDone && inflater.finished()) {
done();
return -1;
} else if (inflater.finished() && compressed != null) {
int rem = inflater.getRemaining();
ByteBuffer buf = compressed.getBuffer();
buf.position(buf.limit() - rem);
readFooter(buf);
int res;
do {
buf.clear();
res = next.read(buf);
buf.flip();
if (res == -1) {
done();
nextDone = true;
return -1;
} else if (res > 0) {
readFooter(buf);
}
} while (res != 0);
compressed.close();
compressed = null;
return 0;
} else if (compressed == null) {
throw new RuntimeException();
}
uncompressed = exchange.getConnection().getByteBufferPool().getArrayBackedPool().allocate();
try {
int read = inflater.inflate(uncompressed.getBuffer().array(), uncompressed.getBuffer().arrayOffset(), uncompressed.getBuffer().limit());
uncompressed.getBuffer().limit(read);
dataDeflated(uncompressed.getBuffer().array(), uncompressed.getBuffer().arrayOffset(), read);
if (inflater.needsInput()) {
compressed.close();
compressed = null;
}
int ret = Buffers.copy(dst, uncompressed.getBuffer());
if (!uncompressed.getBuffer().hasRemaining()) {
uncompressed.close();
uncompressed = null;
}
if(ret > 0) {
return ret;
}
} catch (DataFormatException e) {
done();
throw new IOException(e);
}
}
}
protected void readFooter(ByteBuffer buf) throws IOException {
}
protected boolean readHeader(ByteBuffer byteBuffer) throws IOException {
return true;
}
protected void dataDeflated(byte[] data, int off, int len) {
}
private void done() {
if (compressed != null) {
compressed.close();
}
if (uncompressed != null) {
uncompressed.close();
}
if (inflater != null) {
pooledObject.close();
inflater = null;
}
}
public long transferTo(final long position, final long count, final FileChannel target) throws IOException {
try {
return target.transferFrom(new ConduitReadableByteChannel(this), position, count);
} catch (IOException | RuntimeException | Error e) {
IoUtils.safeClose(exchange.getConnection());
throw e;
}
}
@Override
public long transferTo(final long count, final ByteBuffer throughBuffer, final StreamSinkChannel target) throws IOException {
try {
return IoUtils.transfer(new ConduitReadableByteChannel(this), count, throughBuffer, target);
} catch (IOException | RuntimeException | Error e) {
IoUtils.safeClose(exchange.getConnection());
throw e;
}
}
@Override
public long read(final ByteBuffer[] dsts, final int offset, final int length) throws IOException {
for (int i = offset; i < length; ++i) {
if (dsts[i].hasRemaining()) {
return read(dsts[i]);
}
}
return 0;
}
@Override
public void terminateReads() throws IOException {
done();
next.terminateReads();
}
}