/*
* 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.http2;
import java.io.IOException;
import java.lang.reflect.Method;
import java.net.InetSocketAddress;
import java.net.URI;
import java.nio.ByteBuffer;
import java.util.Arrays;
import java.util.Collections;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import javax.net.ssl.SSLEngine;
import org.eclipse.jetty.alpn.ALPN;
import org.xnio.ChannelListener;
import org.xnio.IoFuture;
import org.xnio.OptionMap;
import org.xnio.Pool;
import org.xnio.StreamConnection;
import org.xnio.XnioIoThread;
import org.xnio.XnioWorker;
import org.xnio.channels.StreamSourceChannel;
import org.xnio.conduits.PushBackStreamSourceConduit;
import org.xnio.ssl.JsseXnioSsl;
import org.xnio.ssl.SslConnection;
import org.xnio.ssl.XnioSsl;
import io.undertow.UndertowLogger;
import io.undertow.UndertowMessages;
import io.undertow.client.ClientCallback;
import io.undertow.client.ClientConnection;
import io.undertow.client.ClientProvider;
import io.undertow.protocols.http2.Http2Channel;
import io.undertow.util.ImmediatePooled;
/**
* Plaintext HTTP2 client provider that works using HTTP upgrade
*
* @author Stuart Douglas
*/
public class Http2ClientProvider implements ClientProvider {
private static final String PROTOCOL_KEY = Http2ClientProvider.class.getName() + ".protocol";
private static final String HTTP2 = "h2-14";
private static final String HTTP_1_1 = "http/1.1";
private static final List<String> PROTOCOLS = Collections.unmodifiableList(Arrays.asList(new String[]{HTTP2, HTTP_1_1}));
private static final Method ALPN_PUT_METHOD;
static {
Method npnPutMethod;
try {
Class<?> npnClass = Http2ClientProvider.class.getClassLoader().loadClass("org.eclipse.jetty.alpn.ALPN");
npnPutMethod = npnClass.getDeclaredMethod("put", SSLEngine.class, Http2ClientProvider.class.getClassLoader().loadClass("org.eclipse.jetty.alpn.ALPN$Provider"));
} catch (Exception e) {
UndertowLogger.CLIENT_LOGGER.jettyALPNNotFound();
npnPutMethod = null;
}
ALPN_PUT_METHOD = npnPutMethod;
}
@Override
public void connect(final ClientCallback<ClientConnection> listener, final URI uri, final XnioWorker worker, final XnioSsl ssl, final Pool<ByteBuffer> bufferPool, final OptionMap options) {
connect(listener, null, uri, worker, ssl, bufferPool, options);
}
@Override
public void connect(final ClientCallback<ClientConnection> listener, final URI uri, final XnioIoThread ioThread, final XnioSsl ssl, final Pool<ByteBuffer> bufferPool, final OptionMap options) {
connect(listener, null, uri, ioThread, ssl, bufferPool, options);
}
@Override
public Set<String> handlesSchemes() {
return new HashSet<>(Arrays.asList(new String[]{"h2"}));
}
@Override
public void connect(final ClientCallback<ClientConnection> listener, InetSocketAddress bindAddress, final URI uri, final XnioWorker worker, final XnioSsl ssl, final Pool<ByteBuffer> bufferPool, final OptionMap options) {
if(ALPN_PUT_METHOD == null) {
listener.failed(UndertowMessages.MESSAGES.jettyNPNNotAvailable());
return;
}
if (ssl == null) {
listener.failed(UndertowMessages.MESSAGES.sslWasNull());
return;
}
if(bindAddress == null) {
ssl.openSslConnection(worker, new InetSocketAddress(uri.getHost(), uri.getPort() == -1 ? 443 : uri.getPort()), createOpenListener(listener, uri, ssl, bufferPool, options), options).addNotifier(createNotifier(listener), null);
} else {
ssl.openSslConnection(worker, bindAddress, new InetSocketAddress(uri.getHost(), uri.getPort() == -1 ? 443 : uri.getPort()), createOpenListener(listener, uri, ssl, bufferPool, options), options).addNotifier(createNotifier(listener), null);
}
}
@Override
public void connect(final ClientCallback<ClientConnection> listener, InetSocketAddress bindAddress, final URI uri, final XnioIoThread ioThread, final XnioSsl ssl, final Pool<ByteBuffer> bufferPool, final OptionMap options) {
if(ALPN_PUT_METHOD == null) {
listener.failed(UndertowMessages.MESSAGES.jettyNPNNotAvailable());
return;
}
if (ssl == null) {
listener.failed(UndertowMessages.MESSAGES.sslWasNull());
return;
}
if(bindAddress == null) {
ssl.openSslConnection(ioThread, new InetSocketAddress(uri.getHost(), uri.getPort() == -1 ? 443 : uri.getPort()), createOpenListener(listener, uri, ssl, bufferPool, options), options).addNotifier(createNotifier(listener), null);
} else {
ssl.openSslConnection(ioThread, bindAddress, new InetSocketAddress(uri.getHost(), uri.getPort() == -1 ? 443 : uri.getPort()), createOpenListener(listener, uri, ssl, bufferPool, options), options).addNotifier(createNotifier(listener), null);
}
}
private IoFuture.Notifier<StreamConnection, Object> createNotifier(final ClientCallback<ClientConnection> listener) {
return new IoFuture.Notifier<StreamConnection, Object>() {
@Override
public void notify(IoFuture<? extends StreamConnection> ioFuture, Object o) {
if (ioFuture.getStatus() == IoFuture.Status.FAILED) {
listener.failed(ioFuture.getException());
}
}
};
}
private ChannelListener<StreamConnection> createOpenListener(final ClientCallback<ClientConnection> listener, final URI uri, final XnioSsl ssl, final Pool<ByteBuffer> bufferPool, final OptionMap options) {
return new ChannelListener<StreamConnection>() {
@Override
public void handleEvent(StreamConnection connection) {
handleConnected(connection, listener, uri, ssl, bufferPool, options);
}
};
}
private void handleConnected(StreamConnection connection, final ClientCallback<ClientConnection> listener, URI uri, XnioSsl ssl, Pool<ByteBuffer> bufferPool, OptionMap options) {
handlePotentialHttp2Connection(connection, listener, bufferPool, options, new ChannelListener<SslConnection>() {
@Override
public void handleEvent(SslConnection channel) {
listener.failed(UndertowMessages.MESSAGES.spdyNotSupported());
}
});
}
public static boolean isEnabled() {
return ALPN_PUT_METHOD != null;
}
/**
* Not really part of the public API, but is used by the HTTP client to initiate a HTTP2 connection for HTTPS requests.
*/
public static void handlePotentialHttp2Connection(final StreamConnection connection, final ClientCallback<ClientConnection> listener, final Pool<ByteBuffer> bufferPool, final OptionMap options, final ChannelListener<SslConnection> http2FailedListener) {
final SslConnection sslConnection = (SslConnection) connection;
final SSLEngine sslEngine = JsseXnioSsl.getSslEngine(sslConnection);
String existing = (String) sslEngine.getSession().getValue(PROTOCOL_KEY);
if(existing != null) {
if (existing.equals(HTTP2)) {
listener.completed(createHttp2Channel(connection, bufferPool, options));
} else {
sslConnection.getSourceChannel().suspendReads();
http2FailedListener.handleEvent(sslConnection);
}
} else {
final SpdySelectionProvider spdySelectionProvider = new SpdySelectionProvider(sslEngine);
try {
ALPN_PUT_METHOD.invoke(null, sslEngine, spdySelectionProvider);
} catch (Exception e) {
http2FailedListener.handleEvent(sslConnection);
return;
}
try {
sslConnection.startHandshake();
sslConnection.getSourceChannel().getReadSetter().set(new ChannelListener<StreamSourceChannel>() {
@Override
public void handleEvent(StreamSourceChannel channel) {
if (spdySelectionProvider.selected != null) {
if (spdySelectionProvider.selected.equals(HTTP_1_1)) {
sslConnection.getSourceChannel().suspendReads();
http2FailedListener.handleEvent(sslConnection);
return;
} else if (spdySelectionProvider.selected.equals(HTTP2)) {
listener.completed(createHttp2Channel(connection, bufferPool, options));
}
} else {
ByteBuffer buf = ByteBuffer.allocate(100);
try {
int read = channel.read(buf);
if (read > 0) {
PushBackStreamSourceConduit pb = new PushBackStreamSourceConduit(connection.getSourceChannel().getConduit());
pb.pushBack(new ImmediatePooled<>(buf));
connection.getSourceChannel().setConduit(pb);
}
if ((spdySelectionProvider.selected == null && read > 0) || HTTP_1_1.equals(spdySelectionProvider.selected)) {
sslConnection.getSourceChannel().suspendReads();
http2FailedListener.handleEvent(sslConnection);
return;
} else if (spdySelectionProvider.selected != null) {
//we have spdy
if (spdySelectionProvider.selected.equals(HTTP2)) {
listener.completed(createHttp2Channel(connection, bufferPool, options));
}
}
} catch (IOException e) {
listener.failed(e);
}
}
}
});
sslConnection.getSourceChannel().resumeReads();
} catch (IOException e) {
listener.failed(e);
}
}
}
private static Http2ClientConnection createHttp2Channel(StreamConnection connection, Pool<ByteBuffer> bufferPool, OptionMap options) {
Http2Channel http2Channel = new Http2Channel(connection, bufferPool, null, true, false, options);
return new Http2ClientConnection(http2Channel, false);
}
private static class SpdySelectionProvider implements ALPN.ClientProvider {
private String selected;
private final SSLEngine sslEngine;
private SpdySelectionProvider(SSLEngine sslEngine) {
this.sslEngine = sslEngine;
}
@Override
public boolean supports() {
return true;
}
@Override
public List<String> protocols() {
return PROTOCOLS;
}
@Override
public void unsupported() {
selected = HTTP_1_1;
}
@Override
public void selected(String s) {
ALPN.remove(sslEngine);
selected = s;
sslEngine.getSession().putValue(PROTOCOL_KEY, selected);
}
private String getSelected() {
return selected;
}
}
}