io.undertow.conduits.StoredResponseStreamSinkConduit 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.ByteArrayOutputStream;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.channels.FileChannel;
import org.xnio.IoUtils;
import org.xnio.channels.StreamSourceChannel;
import org.xnio.conduits.AbstractStreamSinkConduit;
import org.xnio.conduits.ConduitWritableByteChannel;
import org.xnio.conduits.StreamSinkConduit;
import io.undertow.UndertowMessages;
import io.undertow.server.HttpServerExchange;
import io.undertow.util.AttachmentKey;
/**
* @author Stuart Douglas
*/
public final class StoredResponseStreamSinkConduit extends AbstractStreamSinkConduit {
public static final AttachmentKey RESPONSE = AttachmentKey.create(byte[].class);
private ByteArrayOutputStream outputStream;
private final HttpServerExchange exchange;
/**
* Construct a new instance.
*
* @param next the delegate conduit to set
* @param exchange
*/
public StoredResponseStreamSinkConduit(StreamSinkConduit next, HttpServerExchange exchange) {
super(next);
this.exchange = exchange;
long length = exchange.getResponseContentLength();
if (length <= 0L) {
outputStream = new ByteArrayOutputStream();
} else {
if (length > Integer.MAX_VALUE) {
throw UndertowMessages.MESSAGES.responseTooLargeToBuffer(length);
}
outputStream = new ByteArrayOutputStream((int) length);
}
}
@Override
public long transferFrom(StreamSourceChannel source, long count, ByteBuffer throughBuffer) throws IOException {
return IoUtils.transfer(source, count, throughBuffer, new ConduitWritableByteChannel(this));
}
@Override
public long transferFrom(FileChannel src, long position, long count) throws IOException {
return src.transferTo(position, count, new ConduitWritableByteChannel(this));
}
@Override
public int write(ByteBuffer src) throws IOException {
int start = src.position();
int ret = super.write(src);
if (outputStream != null) {
for (int i = start; i < start + ret; ++i) {
outputStream.write(src.get(i));
}
}
return ret;
}
@Override
public long write(ByteBuffer[] srcs, int offs, int len) throws IOException {
int[] starts = new int[len];
for (int i = 0; i < len; ++i) {
starts[i] = srcs[i + offs].position();
}
long ret = super.write(srcs, offs, len);
long rem = ret;
if (outputStream != null) {
for (int i = 0; i < len; ++i) {
ByteBuffer buf = srcs[i + offs];
int pos = starts[i];
while (rem > 0 && pos < buf.position()) {
outputStream.write(buf.get(pos));
pos++;
rem--;
}
}
}
return ret;
}
@Override
public int writeFinal(ByteBuffer src) throws IOException {
int start = src.position();
int ret = super.writeFinal(src);
if (outputStream != null) {
for (int i = start; i < start + ret; ++i) {
outputStream.write(src.get(i));
}
if (!src.hasRemaining()) {
exchange.putAttachment(RESPONSE, outputStream.toByteArray());
outputStream = null;
}
}
return ret;
}
@Override
public long writeFinal(ByteBuffer[] srcs, int offs, int len) throws IOException {
int[] starts = new int[len];
long toWrite = 0;
for (int i = 0; i < len; ++i) {
starts[i] = srcs[i + offs].position();
toWrite += srcs[i + offs].remaining();
}
long ret = super.write(srcs, offs, len);
long rem = ret;
if (outputStream != null) {
for (int i = 0; i < len; ++i) {
ByteBuffer buf = srcs[i + offs];
int pos = starts[i];
while (rem > 0 && pos < buf.position()) {
outputStream.write(buf.get(pos));
pos++;
rem--;
}
}
if (toWrite == ret) {
exchange.putAttachment(RESPONSE, outputStream.toByteArray());
outputStream = null;
}
}
return ret;
}
@Override
public void terminateWrites() throws IOException {
if (outputStream != null) {
exchange.putAttachment(RESPONSE, outputStream.toByteArray());
outputStream = null;
}
super.terminateWrites();
}
}