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1   /*
2    * Copyright 2014 The Netty Project
3    *
4    * The Netty Project licenses this file to you under the Apache License,
5    * version 2.0 (the "License"); you may not use this file except in compliance
6    * with the License. You may obtain a copy of the License at:
7    *
8    *   https://www.apache.org/licenses/LICENSE-2.0
9    *
10   * Unless required by applicable law or agreed to in writing, software
11   * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
12   * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
13   * License for the specific language governing permissions and limitations
14   * under the License.
15   */
16  package io.netty.example.spdy.client;
17  
18  import io.netty.bootstrap.Bootstrap;
19  import io.netty.buffer.Unpooled;
20  import io.netty.channel.Channel;
21  import io.netty.channel.ChannelOption;
22  import io.netty.channel.EventLoopGroup;
23  import io.netty.channel.MultiThreadIoEventLoopGroup;
24  import io.netty.channel.nio.NioIoHandler;
25  import io.netty.channel.socket.nio.NioSocketChannel;
26  import io.netty.handler.codec.http.DefaultFullHttpRequest;
27  import io.netty.handler.codec.http.HttpHeaderNames;
28  import io.netty.handler.codec.http.HttpHeaderValues;
29  import io.netty.handler.codec.http.HttpMethod;
30  import io.netty.handler.codec.http.HttpRequest;
31  import io.netty.handler.codec.http.HttpVersion;
32  import io.netty.handler.ssl.ApplicationProtocolConfig;
33  import io.netty.handler.ssl.ApplicationProtocolConfig.Protocol;
34  import io.netty.handler.ssl.ApplicationProtocolConfig.SelectedListenerFailureBehavior;
35  import io.netty.handler.ssl.ApplicationProtocolConfig.SelectorFailureBehavior;
36  import io.netty.handler.ssl.ApplicationProtocolNames;
37  import io.netty.handler.ssl.SslContext;
38  import io.netty.handler.ssl.SslContextBuilder;
39  import io.netty.handler.ssl.util.InsecureTrustManagerFactory;
40  
41  /**
42   * An SPDY client that allows you to send HTTP GET to a SPDY server.
43   * <p>
44   * You may also use the {@code run-example.sh} script to start the client from the command line:
45   * <pre>
46   *     ./run-example.sh spdy-client
47   * </pre>
48   */
49  public final class SpdyClient {
50  
51      static final String HOST = System.getProperty("host", "127.0.0.1");
52      static final int PORT = Integer.parseInt(System.getProperty("port", "8443"));
53  
54      public static void main(String[] args) throws Exception {
55          // Configure SSL.
56          final SslContext sslCtx = SslContextBuilder.forClient()
57              .trustManager(InsecureTrustManagerFactory.INSTANCE)
58              .applicationProtocolConfig(new ApplicationProtocolConfig(
59                          Protocol.ALPN,
60                          // NO_ADVERTISE is currently the only mode supported by both OpenSsl and JDK providers.
61                          SelectorFailureBehavior.NO_ADVERTISE,
62                          // ACCEPT is currently the only mode supported by both OpenSsl and JDK providers.
63                          SelectedListenerFailureBehavior.ACCEPT,
64                          ApplicationProtocolNames.SPDY_3_1,
65                          ApplicationProtocolNames.HTTP_1_1))
66              .build();
67  
68          HttpResponseClientHandler httpResponseHandler = new HttpResponseClientHandler();
69          EventLoopGroup group = new MultiThreadIoEventLoopGroup(NioIoHandler.newFactory());
70  
71          try {
72              Bootstrap b = new Bootstrap();
73              b.group(group);
74              b.channel(NioSocketChannel.class);
75              b.option(ChannelOption.SO_KEEPALIVE, true);
76              b.remoteAddress(HOST, PORT);
77              b.handler(new SpdyClientInitializer(sslCtx, httpResponseHandler));
78  
79              // Start the client.
80              Channel channel = b.connect().syncUninterruptibly().channel();
81              System.out.println("Connected to " + HOST + ':' + PORT);
82  
83              // Create a GET request.
84              HttpRequest request = new DefaultFullHttpRequest(
85                      HttpVersion.HTTP_1_1, HttpMethod.GET, "", Unpooled.EMPTY_BUFFER);
86              request.headers().set(HttpHeaderNames.HOST, HOST);
87              request.headers().set(HttpHeaderNames.ACCEPT_ENCODING, HttpHeaderValues.GZIP);
88  
89              // Send the GET request.
90              channel.writeAndFlush(request).sync();
91  
92              // Waits for the complete HTTP response
93              httpResponseHandler.queue().take().sync();
94              System.out.println("Finished SPDY HTTP GET");
95  
96              // Wait until the connection is closed.
97              channel.close().syncUninterruptibly();
98          } finally {
99              group.shutdownGracefully();
100         }
101     }
102 }