io.undertow.server.handlers.HttpContinueReadHandler 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 java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.channels.FileChannel;
import java.util.concurrent.TimeUnit;
import org.xnio.channels.StreamSinkChannel;
import org.xnio.conduits.AbstractStreamSourceConduit;
import org.xnio.conduits.StreamSourceConduit;
import io.undertow.server.ConduitWrapper;
import io.undertow.server.Connectors;
import io.undertow.server.HttpHandler;
import io.undertow.server.HttpServerExchange;
import io.undertow.server.ResponseCommitListener;
import io.undertow.server.protocol.http.HttpContinue;
import io.undertow.util.ConduitFactory;
import io.undertow.util.StatusCodes;
/**
* Handler for requests that require 100-continue responses. If an attempt is made to read from the source
* channel then a 100 continue response is sent.
*
* @author Stuart Douglas
*/
public class HttpContinueReadHandler implements HttpHandler {
private static final ConduitWrapper WRAPPER = new ConduitWrapper() {
@Override
public StreamSourceConduit wrap(final ConduitFactory factory, final HttpServerExchange exchange) {
if (exchange.isRequestChannelAvailable() && !exchange.isResponseStarted()) {
return new ContinueConduit(factory.create(), exchange);
}
return factory.create();
}
};
private final HttpHandler handler;
public HttpContinueReadHandler(final HttpHandler handler) {
this.handler = handler;
}
@Override
public void handleRequest(final HttpServerExchange exchange) throws Exception {
if (HttpContinue.requiresContinueResponse(exchange)) {
exchange.addRequestWrapper(WRAPPER);
exchange.addResponseCommitListener(ContinueResponseCommitListener.INSTANCE);
}
handler.handleRequest(exchange);
}
private enum ContinueResponseCommitListener implements ResponseCommitListener {
INSTANCE;
@Override
public void beforeCommit(HttpServerExchange exchange) {
//we are writing the response, and have not read the request then we mark this as non-persistent
if (!HttpContinue.isContinueResponseSent(exchange)) {
exchange.setPersistent(false);
//we also kill the request channel, because it is unusable now
if (!exchange.isRequestComplete()) {
exchange.getConnection().terminateRequestChannel(exchange);
} else {
Connectors.terminateRequest(exchange);
}
}
}
}
private static final class ContinueConduit extends AbstractStreamSourceConduit implements StreamSourceConduit {
private boolean sent = false;
private HttpContinue.ContinueResponseSender response = null;
private final HttpServerExchange exchange;
protected ContinueConduit(final StreamSourceConduit next, final HttpServerExchange exchange) {
super(next);
this.exchange = exchange;
}
@Override
public long transferTo(final long position, final long count, final FileChannel target) throws IOException {
if (exchange.getStatusCode() == StatusCodes.EXPECTATION_FAILED) {
//rejected
Connectors.terminateRequest(exchange);
return -1;
}
if (!sent) {
sent = true;
response = HttpContinue.createResponseSender(exchange);
}
if (response != null) {
if (!response.send()) {
return 0;
}
response = null;
}
return super.transferTo(position, count, target);
}
@Override
public long transferTo(final long count, final ByteBuffer throughBuffer, final StreamSinkChannel target) throws IOException {
if (exchange.getStatusCode() == StatusCodes.EXPECTATION_FAILED) {
//rejected
Connectors.terminateRequest(exchange);
return -1;
}
if (!sent) {
sent = true;
response = HttpContinue.createResponseSender(exchange);
}
if (response != null) {
if (!response.send()) {
return 0;
}
response = null;
}
return super.transferTo(count, throughBuffer, target);
}
@Override
public int read(final ByteBuffer dst) throws IOException {
if (exchange.getStatusCode() == StatusCodes.EXPECTATION_FAILED) {
//rejected
Connectors.terminateRequest(exchange);
return -1;
}
if (!sent) {
sent = true;
response = HttpContinue.createResponseSender(exchange);
}
if (response != null) {
if (!response.send()) {
return 0;
}
response = null;
}
return super.read(dst);
}
@Override
public long read(final ByteBuffer[] dsts, final int offs, final int len) throws IOException {
if (exchange.getStatusCode() == StatusCodes.EXPECTATION_FAILED) {
//rejected
Connectors.terminateRequest(exchange);
return -1;
}
if (!sent) {
sent = true;
response = HttpContinue.createResponseSender(exchange);
}
if (response != null) {
if (!response.send()) {
return 0;
}
response = null;
}
return super.read(dsts, offs, len);
}
@Override
public void awaitReadable(final long time, final TimeUnit timeUnit) throws IOException {
if (exchange.getStatusCode() == StatusCodes.EXPECTATION_FAILED) {
//rejected
return;
}
if (!sent) {
sent = true;
response = HttpContinue.createResponseSender(exchange);
}
long exitTime = System.currentTimeMillis() + timeUnit.toMillis(time);
if (response != null) {
while (!response.send()) {
long currentTime = System.currentTimeMillis();
if (currentTime > exitTime) {
return;
}
response.awaitWritable(exitTime - currentTime, TimeUnit.MILLISECONDS);
}
response = null;
}
long currentTime = System.currentTimeMillis();
super.awaitReadable(exitTime - currentTime, TimeUnit.MILLISECONDS);
}
@Override
public void awaitReadable() throws IOException {
if (exchange.getStatusCode() == StatusCodes.EXPECTATION_FAILED) {
//rejected
return;
}
if (!sent) {
sent = true;
response = HttpContinue.createResponseSender(exchange);
}
if (response != null) {
while (!response.send()) {
response.awaitWritable();
}
response = null;
}
super.awaitReadable();
}
}
}