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1   /*
2    * Copyright 2012 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    *   http://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.http.websocketx.server;
17  
18  import io.netty.bootstrap.ServerBootstrap;
19  import io.netty.channel.Channel;
20  import io.netty.channel.EventLoopGroup;
21  import io.netty.channel.nio.NioEventLoopGroup;
22  import io.netty.channel.socket.nio.NioServerSocketChannel;
23  import io.netty.handler.logging.LogLevel;
24  import io.netty.handler.logging.LoggingHandler;
25  import io.netty.handler.ssl.SslContext;
26  import io.netty.handler.ssl.util.SelfSignedCertificate;
27  
28  /**
29   * A HTTP server which serves Web Socket requests at:
30   *
31   * http://localhost:8080/websocket
32   *
33   * Open your browser at http://localhost:8080/, then the demo page will be loaded and a Web Socket connection will be
34   * made automatically.
35   *
36   * This server illustrates support for the different web socket specification versions and will work with:
37   *
38   * <ul>
39   * <li>Safari 5+ (draft-ietf-hybi-thewebsocketprotocol-00)
40   * <li>Chrome 6-13 (draft-ietf-hybi-thewebsocketprotocol-00)
41   * <li>Chrome 14+ (draft-ietf-hybi-thewebsocketprotocol-10)
42   * <li>Chrome 16+ (RFC 6455 aka draft-ietf-hybi-thewebsocketprotocol-17)
43   * <li>Firefox 7+ (draft-ietf-hybi-thewebsocketprotocol-10)
44   * <li>Firefox 11+ (RFC 6455 aka draft-ietf-hybi-thewebsocketprotocol-17)
45   * </ul>
46   */
47  public final class WebSocketServer {
48  
49      static final boolean SSL = System.getProperty("ssl") != null;
50      static final int PORT = Integer.parseInt(System.getProperty("port", SSL? "8443" : "8080"));
51  
52      public static void main(String[] args) throws Exception {
53          // Configure SSL.
54          final SslContext sslCtx;
55          if (SSL) {
56              SelfSignedCertificate ssc = new SelfSignedCertificate();
57              sslCtx = SslContext.newServerContext(ssc.certificate(), ssc.privateKey());
58          } else {
59              sslCtx = null;
60          }
61  
62          EventLoopGroup bossGroup = new NioEventLoopGroup(1);
63          EventLoopGroup workerGroup = new NioEventLoopGroup();
64          try {
65              ServerBootstrap b = new ServerBootstrap();
66              b.group(bossGroup, workerGroup)
67               .channel(NioServerSocketChannel.class)
68               .handler(new LoggingHandler(LogLevel.INFO))
69               .childHandler(new WebSocketServerInitializer(sslCtx));
70  
71              Channel ch = b.bind(PORT).sync().channel();
72  
73              System.out.println("Open your web browser and navigate to " +
74                      (SSL? "https" : "http") + "://127.0.0.1:" + PORT + '/');
75  
76              ch.closeFuture().sync();
77          } finally {
78              bossGroup.shutdownGracefully();
79              workerGroup.shutdownGracefully();
80          }
81      }
82  }