1 /*
2 * Copyright 2016 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
17 package io.netty.example.http2.helloworld.frame.server;
18
19 import io.netty.bootstrap.ServerBootstrap;
20 import io.netty.channel.Channel;
21 import io.netty.channel.ChannelOption;
22 import io.netty.channel.EventLoopGroup;
23 import io.netty.channel.nio.NioEventLoopGroup;
24 import io.netty.channel.socket.nio.NioServerSocketChannel;
25 import io.netty.handler.codec.http2.Http2SecurityUtil;
26 import io.netty.handler.logging.LogLevel;
27 import io.netty.handler.logging.LoggingHandler;
28 import io.netty.handler.ssl.ApplicationProtocolConfig;
29 import io.netty.handler.ssl.ApplicationProtocolConfig.Protocol;
30 import io.netty.handler.ssl.ApplicationProtocolConfig.SelectedListenerFailureBehavior;
31 import io.netty.handler.ssl.ApplicationProtocolConfig.SelectorFailureBehavior;
32 import io.netty.handler.ssl.ApplicationProtocolNames;
33 import io.netty.handler.ssl.OpenSsl;
34 import io.netty.handler.ssl.SslContext;
35 import io.netty.handler.ssl.SslContextBuilder;
36 import io.netty.handler.ssl.SslProvider;
37 import io.netty.handler.ssl.SupportedCipherSuiteFilter;
38 import io.netty.handler.ssl.util.SelfSignedCertificate;
39
40 /**
41 * An HTTP/2 Server that responds to requests with a Hello World. Once started, you can test the
42 * server with the example client.
43 *
44 * <p>This example is making use of the "multiplexing" http2 API, where streams are mapped to child
45 * Channels. This API is very experimental and incomplete.
46 */
47 public final class Http2Server {
48
49 static final boolean SSL = System.getProperty("ssl") != null;
50
51 static final int PORT = Integer.parseInt(System.getProperty("port", SSL? "8443" : "8080"));
52
53 public static void main(String[] args) throws Exception {
54 // Configure SSL.
55 final SslContext sslCtx;
56 if (SSL) {
57 SslProvider provider = OpenSsl.isAlpnSupported() ? SslProvider.OPENSSL : SslProvider.JDK;
58 SelfSignedCertificate ssc = new SelfSignedCertificate();
59 sslCtx = SslContextBuilder.forServer(ssc.certificate(), ssc.privateKey())
60 .sslProvider(provider)
61 /* NOTE: the cipher filter may not include all ciphers required by the HTTP/2 specification.
62 * Please refer to the HTTP/2 specification for cipher requirements. */
63 .ciphers(Http2SecurityUtil.CIPHERS, SupportedCipherSuiteFilter.INSTANCE)
64 .applicationProtocolConfig(new ApplicationProtocolConfig(
65 Protocol.ALPN,
66 // NO_ADVERTISE is currently the only mode supported by both OpenSsl and JDK providers.
67 SelectorFailureBehavior.NO_ADVERTISE,
68 // ACCEPT is currently the only mode supported by both OpenSsl and JDK providers.
69 SelectedListenerFailureBehavior.ACCEPT,
70 ApplicationProtocolNames.HTTP_2,
71 ApplicationProtocolNames.HTTP_1_1))
72 .build();
73 } else {
74 sslCtx = null;
75 }
76 // Configure the server.
77 EventLoopGroup group = new NioEventLoopGroup();
78 try {
79 ServerBootstrap b = new ServerBootstrap();
80 b.option(ChannelOption.SO_BACKLOG, 1024);
81 b.group(group)
82 .channel(NioServerSocketChannel.class)
83 .handler(new LoggingHandler(LogLevel.INFO))
84 .childHandler(new Http2ServerInitializer(sslCtx));
85
86 Channel ch = b.bind(PORT).sync().channel();
87
88 System.err.println("Open your HTTP/2-enabled web browser and navigate to " +
89 (SSL? "https" : "http") + "://127.0.0.1:" + PORT + '/');
90
91 ch.closeFuture().sync();
92 } finally {
93 group.shutdownGracefully();
94 }
95 }
96 }
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