io.undertow.client.ALPNClientSelector 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.client;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.channels.ClosedChannelException;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.atomic.AtomicReference;
import javax.net.ssl.SSLEngine;
import org.xnio.ChannelListener;
import org.xnio.channels.StreamSourceChannel;
import org.xnio.conduits.PushBackStreamSourceConduit;
import org.xnio.ssl.SslConnection;
import io.undertow.protocols.alpn.ALPNManager;
import io.undertow.protocols.alpn.ALPNProvider;
import io.undertow.protocols.ssl.SslConduit;
import io.undertow.protocols.ssl.UndertowXnioSsl;
import io.undertow.util.ImmediatePooled;
/**
* @author Stuart Douglas
*/
public class ALPNClientSelector {
private ALPNClientSelector() {
}
public static void runAlpn(final SslConnection sslConnection, final ChannelListener fallback, final ClientCallback failedListener, final ALPNProtocol... details) {
SslConduit conduit = UndertowXnioSsl.getSslConduit(sslConnection);
final ALPNProvider provider = ALPNManager.INSTANCE.getProvider(conduit.getSSLEngine());
if (provider == null) {
fallback.handleEvent(sslConnection);
return;
}
String[] protocols = new String[details.length];
final Map protocolMap = new HashMap<>();
for (int i = 0; i < protocols.length; ++i) {
protocols[i] = details[i].getProtocol();
protocolMap.put(details[i].getProtocol(), details[i]);
}
final SSLEngine sslEngine = provider.setProtocols(conduit.getSSLEngine(), protocols);
conduit.setSslEngine(sslEngine);
final AtomicReference handshakeDone = new AtomicReference<>(false);
try {
sslConnection.startHandshake();
sslConnection.getHandshakeSetter().set(new ChannelListener() {
@Override
public void handleEvent(SslConnection channel) {
if(handshakeDone.get()) {
return;
}
handshakeDone.set(true);
}
});
sslConnection.getSourceChannel().getReadSetter().set(new ChannelListener() {
@Override
public void handleEvent(StreamSourceChannel channel) {
String selectedProtocol = provider.getSelectedProtocol(sslEngine);
if (selectedProtocol != null) {
handleSelected(selectedProtocol);
} else {
ByteBuffer buf = ByteBuffer.allocate(100);
try {
int read = channel.read(buf);
if (read > 0) {
buf.flip();
PushBackStreamSourceConduit pb = new PushBackStreamSourceConduit(sslConnection.getSourceChannel().getConduit());
pb.pushBack(new ImmediatePooled<>(buf));
sslConnection.getSourceChannel().setConduit(pb);
} else if (read == -1) {
failedListener.failed(new ClosedChannelException());
}
selectedProtocol = provider.getSelectedProtocol(sslEngine);
if (selectedProtocol != null) {
handleSelected(selectedProtocol);
} else if (read > 0 || handshakeDone.get()) {
sslConnection.getSourceChannel().suspendReads();
fallback.handleEvent(sslConnection);
return;
}
} catch (Throwable t) {
IOException e = t instanceof IOException ? (IOException) t : new IOException(t);
failedListener.failed(e);
}
}
}
private void handleSelected(String selected) {
if (selected.isEmpty()) {
sslConnection.getSourceChannel().suspendReads();
fallback.handleEvent(sslConnection);
return;
} else {
ALPNClientSelector.ALPNProtocol details = protocolMap.get(selected);
if (details == null) {
//should never happen
sslConnection.getSourceChannel().suspendReads();
fallback.handleEvent(sslConnection);
return;
} else {
sslConnection.getSourceChannel().suspendReads();
details.getSelected().handleEvent(sslConnection);
}
}
}
});
sslConnection.getSourceChannel().resumeReads();
} catch (IOException e) {
failedListener.failed(e);
} catch (Throwable e) {
failedListener.failed(new IOException(e));
}
}
public static class ALPNProtocol {
private final ChannelListener selected;
private final String protocol;
public ALPNProtocol(ChannelListener selected, String protocol) {
this.selected = selected;
this.protocol = protocol;
}
public ChannelListener getSelected() {
return selected;
}
public String getProtocol() {
return protocol;
}
}
}