/*
* Copyright 2014 The Netty Project
*
* The Netty Project licenses this file to you 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.netty.example.http2.helloworld.client;
import io.netty.bootstrap.Bootstrap;
import io.netty.channel.Channel;
import io.netty.channel.ChannelOption;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.nio.NioSocketChannel;
import io.netty.handler.codec.http.DefaultFullHttpRequest;
import io.netty.handler.codec.http.FullHttpRequest;
import io.netty.handler.codec.http.HttpHeaderNames;
import io.netty.handler.codec.http.HttpHeaderValues;
import io.netty.handler.codec.http.HttpScheme;
import io.netty.handler.codec.http2.Http2SecurityUtil;
import io.netty.handler.codec.http2.HttpConversionUtil;
import io.netty.handler.ssl.ApplicationProtocolConfig;
import io.netty.handler.ssl.ApplicationProtocolConfig.Protocol;
import io.netty.handler.ssl.ApplicationProtocolConfig.SelectedListenerFailureBehavior;
import io.netty.handler.ssl.ApplicationProtocolConfig.SelectorFailureBehavior;
import io.netty.handler.ssl.ApplicationProtocolNames;
import io.netty.handler.ssl.OpenSsl;
import io.netty.handler.ssl.SslContext;
import io.netty.handler.ssl.SslContextBuilder;
import io.netty.handler.ssl.SslProvider;
import io.netty.handler.ssl.SupportedCipherSuiteFilter;
import io.netty.handler.ssl.util.InsecureTrustManagerFactory;
import io.netty.util.AsciiString;
import io.netty.util.CharsetUtil;
import java.util.concurrent.TimeUnit;
import static io.netty.buffer.Unpooled.wrappedBuffer;
import static io.netty.handler.codec.http.HttpMethod.GET;
import static io.netty.handler.codec.http.HttpMethod.POST;
import static io.netty.handler.codec.http.HttpVersion.HTTP_1_1;
/**
* An HTTP2 client that allows you to send HTTP2 frames to a server. Inbound and outbound frames are
* logged. When run from the command-line, sends a single HEADERS frame to the server and gets back
* a "Hello World" response.
*/
public final class Http2Client {
static final boolean SSL = System.getProperty("ssl") != null;
static final String HOST = System.getProperty("host", "127.0.0.1");
static final int PORT = Integer.parseInt(System.getProperty("port", SSL? "8443" : "8080"));
static final String URL = System.getProperty("url", "/whatever");
static final String URL2 = System.getProperty("url2");
static final String URL2DATA = System.getProperty("url2data", "test data!");
public static void main(String[] args) throws Exception {
// Configure SSL.
final SslContext sslCtx;
if (SSL) {
SslProvider provider = OpenSsl.isAlpnSupported() ? SslProvider.OPENSSL : SslProvider.JDK;
sslCtx = SslContextBuilder.forClient()
.sslProvider(provider)
/* NOTE: the cipher filter may not include all ciphers required by the HTTP/2 specification.
* Please refer to the HTTP/2 specification for cipher requirements. */
.ciphers(Http2SecurityUtil.CIPHERS, SupportedCipherSuiteFilter.INSTANCE)
.trustManager(InsecureTrustManagerFactory.INSTANCE)
.applicationProtocolConfig(new ApplicationProtocolConfig(
Protocol.ALPN,
// NO_ADVERTISE is currently the only mode supported by both OpenSsl and JDK providers.
SelectorFailureBehavior.NO_ADVERTISE,
// ACCEPT is currently the only mode supported by both OpenSsl and JDK providers.
SelectedListenerFailureBehavior.ACCEPT,
ApplicationProtocolNames.HTTP_2,
ApplicationProtocolNames.HTTP_1_1))
.build();
} else {
sslCtx = null;
}
EventLoopGroup workerGroup = new NioEventLoopGroup();
Http2ClientInitializer initializer = new Http2ClientInitializer(sslCtx, Integer.MAX_VALUE);
try {
// Configure the client.
Bootstrap b = new Bootstrap();
b.group(workerGroup);
b.channel(NioSocketChannel.class);
b.option(ChannelOption.SO_KEEPALIVE, true);
b.remoteAddress(HOST, PORT);
b.handler(initializer);
// Start the client.
Channel channel = b.connect().syncUninterruptibly().channel();
System.out.println("Connected to [" + HOST + ':' + PORT + ']');
// Wait for the HTTP/2 upgrade to occur.
Http2SettingsHandler http2SettingsHandler = initializer.settingsHandler();
http2SettingsHandler.awaitSettings(5, TimeUnit.SECONDS);
HttpResponseHandler responseHandler = initializer.responseHandler();
int streamId = 3;
HttpScheme scheme = SSL ? HttpScheme.HTTPS : HttpScheme.HTTP;
AsciiString hostName = new AsciiString(HOST + ':' + PORT);
System.err.println("Sending request(s)...");
if (URL != null) {
// Create a simple GET request.
FullHttpRequest request = new DefaultFullHttpRequest(HTTP_1_1, GET, URL);
request.headers().add(HttpHeaderNames.HOST, hostName);
request.headers().add(HttpConversionUtil.ExtensionHeaderNames.SCHEME.text(), scheme.name());
request.headers().add(HttpHeaderNames.ACCEPT_ENCODING, HttpHeaderValues.GZIP);
request.headers().add(HttpHeaderNames.ACCEPT_ENCODING, HttpHeaderValues.DEFLATE);
responseHandler.put(streamId, channel.write(request), channel.newPromise());
streamId += 2;
}
if (URL2 != null) {
// Create a simple POST request with a body.
FullHttpRequest request = new DefaultFullHttpRequest(HTTP_1_1, POST, URL2,
wrappedBuffer(URL2DATA.getBytes(CharsetUtil.UTF_8)));
request.headers().add(HttpHeaderNames.HOST, hostName);
request.headers().add(HttpConversionUtil.ExtensionHeaderNames.SCHEME.text(), scheme.name());
request.headers().add(HttpHeaderNames.ACCEPT_ENCODING, HttpHeaderValues.GZIP);
request.headers().add(HttpHeaderNames.ACCEPT_ENCODING, HttpHeaderValues.DEFLATE);
responseHandler.put(streamId, channel.write(request), channel.newPromise());
}
channel.flush();
responseHandler.awaitResponses(5, TimeUnit.SECONDS);
System.out.println("Finished HTTP/2 request(s)");
// Wait until the connection is closed.
channel.close().syncUninterruptibly();
} finally {
workerGroup.shutdownGracefully();
}
}
}