/*
* 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.UndertowOptions;
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.protocols.http2.Http2Channel;
import org.xnio.ChannelListener;
import org.xnio.IoFuture;
import org.xnio.OptionMap;
import io.undertow.connector.ByteBufferPool;
import org.xnio.StreamConnection;
import org.xnio.XnioIoThread;
import org.xnio.XnioWorker;
import org.xnio.conduits.ConduitStreamSinkChannel;
import org.xnio.ssl.XnioSsl;
import java.io.IOException;
import java.net.InetSocketAddress;
import java.net.URI;
import java.nio.ByteBuffer;
import java.util.Arrays;
import java.util.HashSet;
import java.util.Set;
/**
* HTTP2 client provider that connects to endpoints that are known to support HTTP2
*
* @author Stuart Douglas
*/
public class Http2PriorKnowledgeClientProvider implements ClientProvider {
private static final byte[] PRI_REQUEST = {'P','R','I',' ','*',' ','H','T','T','P','/','2','.','0','\r','\n','\r','\n','S','M','\r','\n','\r','\n'};
@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[]{"h2c-prior"}));
}
@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 (bindAddress == null) {
worker.openStreamConnection(new InetSocketAddress(uri.getHost(), uri.getPort() == -1 ? 80 : uri.getPort()), createOpenListener(listener, bufferPool, options, uri.getHost()), options).addNotifier(createNotifier(listener), null);
} else {
worker.openStreamConnection(bindAddress, new InetSocketAddress(uri.getHost(), uri.getPort() == -1 ? 80 : uri.getPort()), createOpenListener(listener, bufferPool, options, uri.getHost()), null, options).addNotifier(createNotifier(listener), null);
}}
@Override
public void connect(final ClientCallback<ClientConnection> listener, final InetSocketAddress bindAddress, final URI uri, final XnioIoThread ioThread, final XnioSsl ssl, final ByteBufferPool bufferPool, final OptionMap options) {
if (bindAddress == null) {
ioThread.openStreamConnection(new InetSocketAddress(uri.getHost(), uri.getPort() == -1 ? 80 : uri.getPort()), createOpenListener(listener, bufferPool, options, uri.getHost()), options).addNotifier(createNotifier(listener), null);
} else {
ioThread.openStreamConnection(bindAddress, new InetSocketAddress(uri.getHost(), uri.getPort() == -1 ? 80 : uri.getPort()), createOpenListener(listener, bufferPool, options, uri.getHost()), null, 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 ByteBufferPool bufferPool, final OptionMap options, final String defaultHost) {
return new ChannelListener<StreamConnection>() {
@Override
public void handleEvent(StreamConnection connection) {
handleConnected(connection, listener, bufferPool, options, defaultHost);
}
};
}
private void handleConnected(final StreamConnection connection, final ClientCallback<ClientConnection> listener, final ByteBufferPool bufferPool, final OptionMap options, final String defaultHost) {
try {
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;
}
final ByteBuffer pri = ByteBuffer.wrap(PRI_REQUEST);
pri.flip();
ConduitStreamSinkChannel sink = connection.getSinkChannel();
sink.write(pri);
if(pri.hasRemaining()) {
sink.setWriteListener(new ChannelListener<ConduitStreamSinkChannel>() {
@Override
public void handleEvent(ConduitStreamSinkChannel channel) {
try {
channel.write(pri);
if(pri.hasRemaining()) {
return;
}
listener.completed(new Http2ClientConnection(new Http2Channel(connection, null, bufferPool, null, true, false, options), false, defaultHost, clientStatistics, false));
} catch (IOException e) {
listener.failed(e);
}
}
});
return;
}
listener.completed(new Http2ClientConnection(new Http2Channel(connection, null, bufferPool, null, true, false, options), false, defaultHost, clientStatistics, false));
} catch (IOException e) {
listener.failed(e);
}
}
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;
}
}
}