io.undertow.websockets.core.BufferedBinaryMessage Maven / Gradle / Ivy
Go to download
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.websockets.core;
import io.undertow.util.ImmediatePooled;
import org.xnio.ChannelListener;
import io.undertow.connector.PooledByteBuffer;
import org.xnio.Pooled;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
/**
* A buffered binary message.
*
* @author Stuart Douglas
*/
public class BufferedBinaryMessage {
private final boolean bufferFullMessage;
private List data = new ArrayList<>(1);
private PooledByteBuffer current;
private final long maxMessageSize;
private long currentSize;
private boolean complete;
// private int frameCount; // was used only in handleNewFrame() which is marked for removal => commenting out
public BufferedBinaryMessage(long maxMessageSize, boolean bufferFullMessage) {
this.bufferFullMessage = bufferFullMessage;
this.maxMessageSize = maxMessageSize;
}
public BufferedBinaryMessage(boolean bufferFullMessage) {
this(-1, bufferFullMessage);
}
public void readBlocking(StreamSourceFrameChannel channel) throws IOException {
if (current == null) {
current = channel.getWebSocketChannel().getBufferPool().allocate();
}
for (; ; ) {
int res = channel.read(current.getBuffer());
if (res == -1) {
complete = true;
return;
} else if (res == 0) {
channel.awaitReadable();
}
checkMaxSize(channel, res);
if (bufferFullMessage) {
dealWithFullBuffer(channel);
} else if (!current.getBuffer().hasRemaining()) {
return;
}
}
}
private void dealWithFullBuffer(StreamSourceFrameChannel channel) {
if (!current.getBuffer().hasRemaining()) {
current.getBuffer().flip();
data.add(current);
current = channel.getWebSocketChannel().getBufferPool().allocate();
}
}
public void read(final StreamSourceFrameChannel channel, final WebSocketCallback callback) {
try {
for (; ; ) {
if (current == null) {
current = channel.getWebSocketChannel().getBufferPool().allocate();
}
int res = channel.read(current.getBuffer());
if (res == -1) {
this.complete = true;
callback.complete(channel.getWebSocketChannel(), this);
return;
} else if (res == 0) {
if(!bufferFullMessage) {
callback.complete(channel.getWebSocketChannel(), BufferedBinaryMessage.this);
}
channel.getReadSetter().set(new ChannelListener() {
@Override
public void handleEvent(StreamSourceFrameChannel channel) {
if(complete ) {
return;
}
try {
for (; ; ) {
if (current == null) {
current = channel.getWebSocketChannel().getBufferPool().allocate();
}
int res = channel.read(current.getBuffer());
if (res == -1) {
complete = true;
channel.suspendReads();
callback.complete(channel.getWebSocketChannel(), BufferedBinaryMessage.this);
return;
} else if (res == 0) {
return;
}
checkMaxSize(channel, res);
if (bufferFullMessage) {
dealWithFullBuffer(channel);
} else if (!current.getBuffer().hasRemaining()) {
callback.complete(channel.getWebSocketChannel(), BufferedBinaryMessage.this);
}
}
} catch (IOException e) {
channel.suspendReads();
callback.onError(channel.getWebSocketChannel(), BufferedBinaryMessage.this, e);
}
}
});
channel.resumeReads();
return;
}
checkMaxSize(channel, res);
if (bufferFullMessage) {
dealWithFullBuffer(channel);
} else if (!current.getBuffer().hasRemaining()) {
callback.complete(channel.getWebSocketChannel(), BufferedBinaryMessage.this);
}
}
} catch (IOException e) {
callback.onError(channel.getWebSocketChannel(), this, e);
}
}
private void checkMaxSize(StreamSourceFrameChannel channel, int res) throws IOException {
currentSize += res;
if (maxMessageSize > 0 && currentSize > maxMessageSize) {
getData().free();
WebSockets.sendClose(new CloseMessage(CloseMessage.MSG_TOO_BIG, WebSocketMessages.MESSAGES.messageToBig(maxMessageSize)), channel.getWebSocketChannel(), null);
throw new IOException(WebSocketMessages.MESSAGES.messageToBig(maxMessageSize));
}
}
public Pooled getData() {
if (current == null) {
return new ImmediatePooled<>(new ByteBuffer[0]);
}
if (data.isEmpty()) {
final PooledByteBuffer current = this.current;
current.getBuffer().flip();
this.current = null;
final ByteBuffer[] data = new ByteBuffer[]{current.getBuffer()};
return new PooledByteBufferArray(Collections.singletonList(current), data);
}
current.getBuffer().flip();
data.add(current);
current = null;
ByteBuffer[] ret = new ByteBuffer[data.size()];
for (int i = 0; i < data.size(); ++i) {
ret[i] = data.get(i).getBuffer();
}
List data = this.data;
this.data = new ArrayList<>();
return new PooledByteBufferArray(data, ret);
}
public boolean isComplete() {
return complete;
}
private static final class PooledByteBufferArray implements Pooled {
private final List pooled;
private final ByteBuffer[] data;
private PooledByteBufferArray(List pooled, ByteBuffer[] data) {
this.pooled = pooled;
this.data = data;
}
@Override
public void discard() {
for (PooledByteBuffer item : pooled) {
item.close();
}
}
@Override
public void free() {
for (PooledByteBuffer item : pooled) {
item.close();
}
}
@Override
public ByteBuffer[] getResource() throws IllegalStateException {
return data;
}
@Override
public void close() {
free();
}
}
}