io.undertow.server.handlers.RequestBufferingHandler 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.server.handlers;
import io.undertow.UndertowLogger;
import io.undertow.connector.PooledByteBuffer;
import io.undertow.server.Connectors;
import io.undertow.server.HandlerWrapper;
import io.undertow.server.HttpHandler;
import io.undertow.server.HttpServerExchange;
import io.undertow.server.handlers.builder.HandlerBuilder;
import io.undertow.server.protocol.http.HttpContinue;
import org.xnio.ChannelListener;
import org.xnio.IoUtils;
import org.xnio.channels.StreamSourceChannel;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.util.Collections;
import java.util.Map;
import java.util.Set;
/**
*
* Handler that will buffer all request data
*
* @author Stuart Douglas
*/
public class RequestBufferingHandler implements HttpHandler {
private final HttpHandler next;
private final int maxBuffers;
public RequestBufferingHandler(HttpHandler next, int maxBuffers) {
this.next = next;
this.maxBuffers = maxBuffers;
}
@Override
public void handleRequest(final HttpServerExchange exchange) throws Exception {
if(!exchange.isRequestComplete() && !HttpContinue.requiresContinueResponse(exchange.getRequestHeaders())) {
final StreamSourceChannel channel = exchange.getRequestChannel();
int readBuffers = 0;
final PooledByteBuffer[] bufferedData = new PooledByteBuffer[maxBuffers];
PooledByteBuffer buffer = exchange.getConnection().getByteBufferPool().allocate();
try {
do {
int r;
ByteBuffer b = buffer.getBuffer();
r = channel.read(b);
if (r == -1) {
if (b.position() == 0) {
buffer.close();
} else {
b.flip();
bufferedData[readBuffers] = buffer;
}
break;
} else if (r == 0) {
final PooledByteBuffer finalBuffer = buffer;
final int finalReadBuffers = readBuffers;
channel.getReadSetter().set(new ChannelListener() {
PooledByteBuffer buffer = finalBuffer;
int readBuffers = finalReadBuffers;
@Override
public void handleEvent(StreamSourceChannel channel) {
try {
do {
int r;
ByteBuffer b = buffer.getBuffer();
r = channel.read(b);
if (r == -1) {
if (b.position() == 0) {
buffer.close();
} else {
b.flip();
bufferedData[readBuffers] = buffer;
}
Connectors.ungetRequestBytes(exchange, bufferedData);
Connectors.resetRequestChannel(exchange);
channel.getReadSetter().set(null);
channel.suspendReads();
Connectors.executeRootHandler(next, exchange);
return;
} else if (r == 0) {
return;
} else if (!b.hasRemaining()) {
b.flip();
bufferedData[readBuffers++] = buffer;
if (readBuffers == maxBuffers) {
Connectors.ungetRequestBytes(exchange, bufferedData);
Connectors.resetRequestChannel(exchange);
channel.getReadSetter().set(null);
channel.suspendReads();
Connectors.executeRootHandler(next, exchange);
return;
}
buffer = exchange.getConnection().getByteBufferPool().allocate();
}
} while (true);
} catch (Throwable t) {
if (t instanceof IOException) {
UndertowLogger.REQUEST_IO_LOGGER.ioException((IOException) t);
} else {
UndertowLogger.REQUEST_IO_LOGGER.handleUnexpectedFailure(t);
}
for (int i = 0; i < bufferedData.length; ++i) {
IoUtils.safeClose(bufferedData[i]);
}
if (buffer != null && buffer.isOpen()) {
IoUtils.safeClose(buffer);
}
exchange.endExchange();
}
}
});
channel.resumeReads();
return;
} else if (!b.hasRemaining()) {
b.flip();
bufferedData[readBuffers++] = buffer;
if (readBuffers == maxBuffers) {
break;
}
buffer = exchange.getConnection().getByteBufferPool().allocate();
}
} while (true);
Connectors.ungetRequestBytes(exchange, bufferedData);
Connectors.resetRequestChannel(exchange);
} catch (Exception | Error e) {
for (int i = 0; i < bufferedData.length; ++i) {
IoUtils.safeClose(bufferedData[i]);
}
if (buffer != null && buffer.isOpen()) {
IoUtils.safeClose(buffer);
}
throw e;
}
}
next.handleRequest(exchange);
}
public static final class Wrapper implements HandlerWrapper {
private final int maxBuffers;
public Wrapper(int maxBuffers) {
this.maxBuffers = maxBuffers;
}
@Override
public HttpHandler wrap(HttpHandler handler) {
return new RequestBufferingHandler(handler, maxBuffers);
}
}
@Override
public String toString() {
return "buffer-request( " + maxBuffers + " )";
}
public static final class Builder implements HandlerBuilder {
@Override
public String name() {
return "buffer-request";
}
@Override
public Map> parameters() {
return Collections.>singletonMap("buffers", Integer.class);
}
@Override
public Set requiredParameters() {
return Collections.singleton("buffers");
}
@Override
public String defaultParameter() {
return "buffers";
}
@Override
public HandlerWrapper build(Map config) {
return new Wrapper((Integer) config.get("buffers"));
}
}
}