/*
* 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.net.InetSocketAddress;
import java.net.URI;
import java.net.URISyntaxException;
import java.nio.ByteBuffer;
import java.util.Arrays;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
import io.undertow.client.ClientStatistics;
import io.undertow.conduits.ByteActivityCallback;
import io.undertow.conduits.BytesReceivedStreamSourceConduit;
import io.undertow.conduits.BytesSentStreamSinkConduit;
import org.xnio.ChannelListener;
import org.xnio.IoFuture;
import org.xnio.OptionMap;
import io.undertow.connector.ByteBufferPool;
import io.undertow.connector.PooledByteBuffer;
import org.xnio.StreamConnection;
import org.xnio.XnioIoThread;
import org.xnio.XnioWorker;
import org.xnio.channels.BoundChannel;
import org.xnio.http.HttpUpgrade;
import org.xnio.ssl.XnioSsl;
import io.undertow.UndertowOptions;
import io.undertow.client.ClientCallback;
import io.undertow.client.ClientConnection;
import io.undertow.client.ClientProvider;
import io.undertow.protocols.http2.Http2Channel;
import io.undertow.protocols.http2.Http2Setting;
import io.undertow.util.FlexBase64;
import io.undertow.util.Headers;
/**
* HTTP2 client provider that uses HTTP upgrade rather than ALPN. This provider will only use h2c, and sends an initial
* dummy request to do the initial upgrade.
*
*
*
* @author Stuart Douglas
*/
public class Http2ClearClientProvider implements ClientProvider {
@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"}));
}
@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) {
final URI upgradeUri;
try {
upgradeUri = new URI("http", uri.getUserInfo(), uri.getHost(), uri.getPort(), uri.getPath(), uri.getQuery(), uri.getFragment());
} catch (URISyntaxException e) {
listener.failed(new IOException(e));
return;
}
Map<String, String> headers = createHeaders(options, bufferPool, uri);
HttpUpgrade.performUpgrade(worker, bindAddress, upgradeUri, headers, new Http2ClearOpenListener(bufferPool, options, listener, uri.getHost()), null, options, null).addNotifier(new FailedNotifier(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) {
final URI upgradeUri;
try {
upgradeUri = new URI("http", uri.getUserInfo(), uri.getHost(), uri.getPort(), uri.getPath(), uri.getQuery(), uri.getFragment());
} catch (URISyntaxException e) {
listener.failed(new IOException(e));
return;
}
if (bindAddress != null) {
ioThread.openStreamConnection(bindAddress, new InetSocketAddress(uri.getHost(), uri.getPort()), new ChannelListener<StreamConnection>() {
@Override
public void handleEvent(StreamConnection channel) {
Map<String, String> headers = createHeaders(options, bufferPool, uri);
HttpUpgrade.performUpgrade(channel, upgradeUri, headers, new Http2ClearOpenListener(bufferPool, options, listener, uri.getHost()), null).addNotifier(new FailedNotifier(listener), null);
}
}, new ChannelListener<BoundChannel>() {
@Override
public void handleEvent(BoundChannel channel) {
}
}, options).addNotifier(new FailedNotifier(listener), null);
} else {
ioThread.openStreamConnection(new InetSocketAddress(uri.getHost(), uri.getPort()), new ChannelListener<StreamConnection>() {
@Override
public void handleEvent(StreamConnection channel) {
Map<String, String> headers = createHeaders(options, bufferPool, uri);
HttpUpgrade.performUpgrade(channel, upgradeUri, headers, new Http2ClearOpenListener(bufferPool, options, listener, uri.getHost()), null).addNotifier(new FailedNotifier(listener), null);
}
}, new ChannelListener<BoundChannel>() {
@Override
public void handleEvent(BoundChannel channel) {
}
}, options).addNotifier(new FailedNotifier(listener), null);
}
}
private Map<String, String> createHeaders(OptionMap options, ByteBufferPool bufferPool, URI uri) {
Map<String, String> headers = new HashMap<>();
headers.put("HTTP2-Settings", createSettingsFrame(options, bufferPool));
headers.put(Headers.UPGRADE_STRING, Http2Channel.CLEARTEXT_UPGRADE_STRING);
headers.put(Headers.CONNECTION_STRING, "Upgrade, HTTP2-Settings");
headers.put(Headers.HOST_STRING, uri.getHost());
headers.put("X-HTTP2-connect-only", "connect"); //undertow specific header that tells the remote server that this request should be ignored
return headers;
}
public static String createSettingsFrame(OptionMap options, ByteBufferPool bufferPool) {
PooledByteBuffer b = bufferPool.allocate();
try {
ByteBuffer currentBuffer = b.getBuffer();
if (options.contains(UndertowOptions.HTTP2_SETTINGS_HEADER_TABLE_SIZE)) {
pushOption(currentBuffer, Http2Setting.SETTINGS_HEADER_TABLE_SIZE, options.get(UndertowOptions.HTTP2_SETTINGS_HEADER_TABLE_SIZE));
}
if (options.contains(UndertowOptions.HTTP2_SETTINGS_ENABLE_PUSH)) {
pushOption(currentBuffer, Http2Setting.SETTINGS_ENABLE_PUSH, options.get(UndertowOptions.HTTP2_SETTINGS_ENABLE_PUSH) ? 1 : 0);
}
if (options.contains(UndertowOptions.HTTP2_SETTINGS_MAX_CONCURRENT_STREAMS)) {
pushOption(currentBuffer, Http2Setting.SETTINGS_MAX_CONCURRENT_STREAMS, options.get(UndertowOptions.HTTP2_SETTINGS_MAX_CONCURRENT_STREAMS));
}
if (options.contains(UndertowOptions.HTTP2_SETTINGS_INITIAL_WINDOW_SIZE)) {
pushOption(currentBuffer, Http2Setting.SETTINGS_INITIAL_WINDOW_SIZE, options.get(UndertowOptions.HTTP2_SETTINGS_INITIAL_WINDOW_SIZE));
}
if (options.contains(UndertowOptions.HTTP2_SETTINGS_MAX_FRAME_SIZE)) {
pushOption(currentBuffer, Http2Setting.SETTINGS_MAX_FRAME_SIZE, options.get(UndertowOptions.HTTP2_SETTINGS_MAX_FRAME_SIZE));
}
if (options.contains(UndertowOptions.HTTP2_SETTINGS_MAX_HEADER_LIST_SIZE)) {
pushOption(currentBuffer, Http2Setting.SETTINGS_MAX_HEADER_LIST_SIZE, options.get(UndertowOptions.HTTP2_SETTINGS_MAX_HEADER_LIST_SIZE));
} else if(options.contains(UndertowOptions.MAX_HEADER_SIZE)) {
pushOption(currentBuffer, Http2Setting.SETTINGS_MAX_HEADER_LIST_SIZE, options.get(UndertowOptions.HTTP2_SETTINGS_MAX_HEADER_LIST_SIZE));
}
currentBuffer.flip();
return FlexBase64.encodeStringURL(currentBuffer, false);
} finally {
b.close();
}
}
private static void pushOption(ByteBuffer currentBuffer, int id, int value) {
currentBuffer.put((byte) ((id >> 8) & 0xFF));
currentBuffer.put((byte) (id & 0xFF));
currentBuffer.put((byte) ((value >> 24) & 0xFF));
currentBuffer.put((byte) ((value >> 16) & 0xFF));
currentBuffer.put((byte) ((value >> 8) & 0xFF));
currentBuffer.put((byte) (value & 0xFF));
}
private static class Http2ClearOpenListener implements ChannelListener<StreamConnection> {
private final ByteBufferPool bufferPool;
private final OptionMap options;
private final ClientCallback<ClientConnection> listener;
private final String defaultHost;
Http2ClearOpenListener(ByteBufferPool bufferPool, OptionMap options, ClientCallback<ClientConnection> listener, String defaultHost) {
this.bufferPool = bufferPool;
this.options = options;
this.listener = listener;
this.defaultHost = defaultHost;
}
@Override
public void handleEvent(StreamConnection channel) {
final ClientStatisticsImpl clientStatistics;
//first we set up statistics, if required
if (options.get(UndertowOptions.ENABLE_STATISTICS, false)) {
clientStatistics = new ClientStatisticsImpl();
channel.getSinkChannel().setConduit(new BytesSentStreamSinkConduit(channel.getSinkChannel().getConduit(), new ByteActivityCallback() {
@Override
public void activity(long bytes) {
clientStatistics.written += bytes;
}
}));
channel.getSourceChannel().setConduit(new BytesReceivedStreamSourceConduit(channel.getSourceChannel().getConduit(), new ByteActivityCallback() {
@Override
public void activity(long bytes) {
clientStatistics.read += bytes;
}
}));
} else {
clientStatistics = null;
}
Http2Channel http2Channel = new Http2Channel(channel, null, bufferPool, null, true, true, options);
Http2ClientConnection http2ClientConnection = new Http2ClientConnection(http2Channel, true, defaultHost, clientStatistics, false);
listener.completed(http2ClientConnection);
}
}
private static class FailedNotifier implements IoFuture.Notifier<StreamConnection, Object> {
private final ClientCallback<ClientConnection> listener;
FailedNotifier(ClientCallback<ClientConnection> listener) {
this.listener = listener;
}
@Override
public void notify(IoFuture<? extends StreamConnection> ioFuture, Object attachment) {
if (ioFuture.getStatus() == IoFuture.Status.FAILED) {
listener.failed(ioFuture.getException());
}
}
}
private static class ClientStatisticsImpl implements ClientStatistics {
private long requestCount, read, written;
public long getRequestCount() {
return requestCount;
}
public void setRequestCount(long requestCount) {
this.requestCount = requestCount;
}
public void setRead(long read) {
this.read = read;
}
public void setWritten(long written) {
this.written = 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;
}
}
}