Java tutorial
/* * 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 com.flysoloing.learning.network.netty.spdy.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.*; 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.SslContext; import io.netty.handler.ssl.SslContextBuilder; import io.netty.handler.ssl.util.InsecureTrustManagerFactory; /** * An SPDY client that allows you to send HTTP GET to a SPDY server. * <p> * This class must be run with the JVM parameter: {@code java -Xbootclasspath/p:<path_to_npn_boot_jar> ...}. The * "path_to_npn_boot_jar" is the path on the file system for the NPN Boot Jar file which can be downloaded from Maven at * coordinates org.mortbay.jetty.npn:npn-boot. Different versions applies to different OpenJDK versions. See * <a href="http://www.eclipse.org/jetty/documentation/current/npn-chapter.html">Jetty docs</a> for more information. * <p> * You may also use the {@code run-example.sh} script to start the client from the command line: * <pre> * ./run-example.sh spdy-client * </pre> */ public final class SpdyClient { static final String HOST = System.getProperty("host", "127.0.0.1"); static final int PORT = Integer.parseInt(System.getProperty("port", "8443")); public static void main(String[] args) throws Exception { // Configure SSL. final SslContext sslCtx = SslContextBuilder.forClient().trustManager(InsecureTrustManagerFactory.INSTANCE) .applicationProtocolConfig(new ApplicationProtocolConfig(Protocol.NPN, // 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.SPDY_3_1, ApplicationProtocolNames.HTTP_1_1)) .build(); HttpResponseClientHandler httpResponseHandler = new HttpResponseClientHandler(); EventLoopGroup workerGroup = new NioEventLoopGroup(); try { Bootstrap b = new Bootstrap(); b.group(workerGroup); b.channel(NioSocketChannel.class); b.option(ChannelOption.SO_KEEPALIVE, true); b.remoteAddress(HOST, PORT); b.handler(new SpdyClientInitializer(sslCtx, httpResponseHandler)); // Start the client. Channel channel = b.connect().syncUninterruptibly().channel(); System.out.println("Connected to " + HOST + ':' + PORT); // Create a GET request. HttpRequest request = new DefaultFullHttpRequest(HttpVersion.HTTP_1_1, HttpMethod.GET, ""); request.headers().set(HttpHeaderNames.HOST, HOST); request.headers().set(HttpHeaderNames.ACCEPT_ENCODING, HttpHeaderValues.GZIP); // Send the GET request. channel.writeAndFlush(request).sync(); // Waits for the complete HTTP response httpResponseHandler.queue().take().sync(); System.out.println("Finished SPDY HTTP GET"); // Wait until the connection is closed. channel.close().syncUninterruptibly(); } finally { workerGroup.shutdownGracefully(); } } }