io.undertow.websockets.core.BufferedTextMessage 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.websockets.core;
import org.xnio.ChannelListener;
import io.undertow.connector.PooledByteBuffer;
import java.io.IOException;
import java.nio.ByteBuffer;
/**
* A buffered text message.
*
* @author Stuart Douglas
*/
public class BufferedTextMessage {
private final UTF8Output data = new UTF8Output();
private final boolean bufferFullMessage;
private final long maxMessageSize;
private boolean complete;
long currentSize;
/**
* @param maxMessageSize The maximum message size
* @param bufferFullMessage If the complete message should be buffered
*/
public BufferedTextMessage(long maxMessageSize, boolean bufferFullMessage) {
this.maxMessageSize = maxMessageSize;
this.bufferFullMessage = bufferFullMessage;
}
public BufferedTextMessage(boolean bufferFullMessage) {
this(-1, bufferFullMessage);
}
private void checkMaxSize(StreamSourceFrameChannel channel, int res) throws IOException {
if(res > 0) {
currentSize += res;
}
if (maxMessageSize > 0 && currentSize > maxMessageSize) {
WebSockets.sendClose(new CloseMessage(CloseMessage.MSG_TOO_BIG, WebSocketMessages.MESSAGES.messageToBig(maxMessageSize)), channel.getWebSocketChannel(), null);
throw new IOException(WebSocketMessages.MESSAGES.messageToBig(maxMessageSize));
}
}
public void readBlocking(StreamSourceFrameChannel channel) throws IOException {
PooledByteBuffer pooled = channel.getWebSocketChannel().getBufferPool().allocate();
final ByteBuffer buffer = pooled.getBuffer();
try {
for (; ; ) {
int res = channel.read(buffer);
if (res == -1) {
buffer.flip();
data.write(buffer);
this.complete = true;
return;
} else if (res == 0) {
channel.awaitReadable();
}
checkMaxSize(channel, res);
if (!buffer.hasRemaining()) {
buffer.flip();
data.write(buffer);
buffer.compact();
if (!bufferFullMessage) {
//if we are not reading the full message we return
return;
}
}
}
} finally {
pooled.close();
}
}
public void read(final StreamSourceFrameChannel channel, final WebSocketCallback callback) {
PooledByteBuffer pooled = channel.getWebSocketChannel().getBufferPool().allocate();
final ByteBuffer buffer = pooled.getBuffer();
try {
try {
for (; ; ) {
int res = channel.read(buffer);
if (res == -1) {
this.complete = true;
buffer.flip();
data.write(buffer);
callback.complete(channel.getWebSocketChannel(), this);
return;
} else if (res == 0) {
buffer.flip();
if (buffer.hasRemaining()) {
data.write(buffer);
if (!bufferFullMessage) {
callback.complete(channel.getWebSocketChannel(), this);
}
}
channel.getReadSetter().set(new ChannelListener() {
@Override
public void handleEvent(StreamSourceFrameChannel channel) {
if(complete ) {
return;
}
PooledByteBuffer pooled = channel.getWebSocketChannel().getBufferPool().allocate();
final ByteBuffer buffer = pooled.getBuffer();
try {
try {
for (; ; ) {
int res = channel.read(buffer);
if (res == -1) {
checkMaxSize(channel, res);
buffer.flip();
data.write(buffer);
complete = true;
callback.complete(channel.getWebSocketChannel(), BufferedTextMessage.this);
return;
} else if (res == 0) {
buffer.flip();
if (buffer.hasRemaining()) {
data.write(buffer);
if (!bufferFullMessage) {
callback.complete(channel.getWebSocketChannel(), BufferedTextMessage.this);
}
}
return;
}
if (!buffer.hasRemaining()) {
buffer.flip();
data.write(buffer);
buffer.clear();
if (!bufferFullMessage) {
callback.complete(channel.getWebSocketChannel(), BufferedTextMessage.this);
}
}
}
} catch (IOException e) {
callback.onError(channel.getWebSocketChannel(), BufferedTextMessage.this, e);
}
} finally {
pooled.close();
}
}
});
channel.resumeReads();
return;
}
checkMaxSize(channel, res);
if (!buffer.hasRemaining()) {
buffer.flip();
data.write(buffer);
buffer.clear();
if (!bufferFullMessage) {
callback.complete(channel.getWebSocketChannel(), this);
}
}
}
} catch (IOException e) {
callback.onError(channel.getWebSocketChannel(), this, e);
}
} finally {
pooled.close();
}
}
/**
* Gets the buffered data and clears the buffered text message. If this is not called on a UTF8
* character boundary there may be partial code point data that is still buffered.
*
* @return The data
*/
public String getData() {
return data.extract();
}
public boolean isComplete() {
return complete;
}
}