/*
* 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 io.undertow.UndertowLogger;
import io.undertow.UndertowMessages;
import io.undertow.UndertowOptions;
import io.undertow.client.ALPNClientSelector;
import io.undertow.client.ClientCallback;
import io.undertow.client.ClientConnection;
import io.undertow.client.ClientProvider;
import io.undertow.client.ClientStatistics;
import io.undertow.conduits.ByteActivityCallback;
import io.undertow.conduits.BytesReceivedStreamSourceConduit;
import io.undertow.conduits.BytesSentStreamSinkConduit;
import io.undertow.connector.ByteBufferPool;
import io.undertow.protocols.http2.Http2Channel;
import org.xnio.ChannelListener;
import org.xnio.IoFuture;
import org.xnio.IoUtils;
import org.xnio.OptionMap;
import org.xnio.Options;
import org.xnio.StreamConnection;
import org.xnio.XnioIoThread;
import org.xnio.XnioWorker;
import org.xnio.ssl.SslConnection;
import org.xnio.ssl.XnioSsl;
import java.net.InetSocketAddress;
import java.net.URI;
import java.util.Arrays;
import java.util.HashSet;
import java.util.Set;
/**
* Plaintext HTTP2 client provider that works using HTTP upgrade
*
* @author Stuart Douglas
*/
public class Http2ClientProvider implements ClientProvider {
private static final String HTTP2 = "h2";
private static final String HTTP_1_1 = "http/1.1";
private static final ChannelListener<SslConnection> FAILED = new ChannelListener<SslConnection>() {
@Override
public void handleEvent(SslConnection connection) {
UndertowLogger.ROOT_LOGGER.alpnConnectionFailed(connection);
IoUtils.safeClose(connection);
}
};
@Override
public void connect(final ClientCallback<ClientConnection> listener, final URI uri, final XnioWorker worker, final XnioSsl ssl, final ByteBufferPool 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 ByteBufferPool 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 ByteBufferPool bufferPool, final OptionMap options) {
if (ssl == null) {
listener.failed(UndertowMessages.MESSAGES.sslWasNull());
return;
}
OptionMap tlsOptions = OptionMap.builder().addAll(options).set(Options.SSL_STARTTLS, true).getMap();
if(bindAddress == null) {
ssl.openSslConnection(worker, new InetSocketAddress(uri.getHost(), uri.getPort() == -1 ? 443 : uri.getPort()), createOpenListener(listener, uri, ssl, bufferPool, tlsOptions), tlsOptions).addNotifier(createNotifier(listener), null);
} else {
ssl.openSslConnection(worker, bindAddress, new InetSocketAddress(uri.getHost(), uri.getPort() == -1 ? 443 : uri.getPort()), createOpenListener(listener, uri, ssl, bufferPool, tlsOptions), tlsOptions).addNotifier(createNotifier(listener), null);
}
}
@Override
public void connect(final ClientCallback<ClientConnection> listener, InetSocketAddress bindAddress, final URI uri, final XnioIoThread ioThread, final XnioSsl ssl, final ByteBufferPool bufferPool, final OptionMap options) {
if (ssl == null) {
listener.failed(UndertowMessages.MESSAGES.sslWasNull());
return;
}
if(bindAddress == null) {
OptionMap tlsOptions = OptionMap.builder().addAll(options).set(Options.SSL_STARTTLS, true).getMap();
ssl.openSslConnection(ioThread, new InetSocketAddress(uri.getHost(), uri.getPort() == -1 ? 443 : uri.getPort()), createOpenListener(listener, uri, ssl, bufferPool, tlsOptions), 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 ByteBufferPool bufferPool, final OptionMap options) {
return new ChannelListener<StreamConnection>() {
@Override
public void handleEvent(StreamConnection connection) {
handleConnected(connection, listener, uri, bufferPool, options);
}
};
}
public static ALPNClientSelector.ALPNProtocol alpnProtocol(final ClientCallback<ClientConnection> listener, URI uri, ByteBufferPool bufferPool, OptionMap options) {
return new ALPNClientSelector.ALPNProtocol(new ChannelListener<SslConnection>() {
@Override
public void handleEvent(SslConnection connection) {
listener.completed(createHttp2Channel(connection, bufferPool, options, uri.getHost()));
}
}, HTTP2);
};
private void handleConnected(StreamConnection connection, final ClientCallback<ClientConnection> listener, URI uri,ByteBufferPool bufferPool, OptionMap options) {
ALPNClientSelector.runAlpn((SslConnection) connection, FAILED, listener, alpnProtocol(listener, uri, bufferPool, options));
}
private static Http2ClientConnection createHttp2Channel(StreamConnection connection, ByteBufferPool bufferPool, OptionMap options, String defaultHost) {
final ClientStatisticsImpl clientStatistics;
//first we set up statistics, if required
if (options.get(UndertowOptions.ENABLE_STATISTICS, false)) {
clientStatistics = new ClientStatisticsImpl();
connection.getSinkChannel().setConduit(new BytesSentStreamSinkConduit(connection.getSinkChannel().getConduit(), new ByteActivityCallback() {
@Override
public void activity(long bytes) {
clientStatistics.written += bytes;
}
}));
connection.getSourceChannel().setConduit(new BytesReceivedStreamSourceConduit(connection.getSourceChannel().getConduit(), new ByteActivityCallback() {
@Override
public void activity(long bytes) {
clientStatistics.read += bytes;
}
}));
} else {
clientStatistics = null;
}
Http2Channel http2Channel = new Http2Channel(connection, null, bufferPool, null, true, false, options);
return new Http2ClientConnection(http2Channel, false, defaultHost, clientStatistics, true);
}
private static class ClientStatisticsImpl implements ClientStatistics {
private long requestCount, read, written;
@Override
public long getRequests() {
return requestCount;
}
@Override
public long getRead() {
return read;
}
@Override
public long getWritten() {
return written;
}
@Override
public void reset() {
read = 0;
written = 0;
requestCount = 0;
}
}
}