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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    *   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.spdy.server;
17  
18  import io.netty.buffer.ByteBuf;
19  import io.netty.buffer.Unpooled;
20  import io.netty.channel.ChannelFutureListener;
21  import io.netty.channel.ChannelHandlerContext;
22  import io.netty.channel.SimpleChannelInboundHandler;
23  import io.netty.handler.codec.http.DefaultFullHttpResponse;
24  import io.netty.handler.codec.http.FullHttpResponse;
25  import io.netty.handler.codec.http.HttpRequest;
26  import io.netty.util.CharsetUtil;
27  
28  import java.util.Date;
29  
30  import static io.netty.handler.codec.http.HttpHeaders.Names.*;
31  import static io.netty.handler.codec.http.HttpHeaders.*;
32  import static io.netty.handler.codec.http.HttpResponseStatus.*;
33  import static io.netty.handler.codec.http.HttpVersion.*;
34  
35  /**
36   * HTTP handler that responds with a "Hello World"
37   */
38  public class SpdyServerHandler extends SimpleChannelInboundHandler<Object> {
39  
40      @Override
41      public void channelRead0(ChannelHandlerContext ctx, Object msg) throws Exception {
42          if (msg instanceof HttpRequest) {
43              HttpRequest req = (HttpRequest) msg;
44  
45              if (is100ContinueExpected(req)) {
46                  ctx.write(new DefaultFullHttpResponse(HTTP_1_1, CONTINUE));
47              }
48              boolean keepAlive = isKeepAlive(req);
49  
50              ByteBuf content = Unpooled.copiedBuffer("Hello World " + new Date(), CharsetUtil.UTF_8);
51  
52              FullHttpResponse response = new DefaultFullHttpResponse(HTTP_1_1, OK, content);
53              response.headers().set(CONTENT_TYPE, "text/plain; charset=UTF-8");
54              response.headers().set(CONTENT_LENGTH, response.content().readableBytes());
55  
56              if (!keepAlive) {
57                  ctx.write(response).addListener(ChannelFutureListener.CLOSE);
58              } else {
59                  response.headers().set(CONNECTION, Values.KEEP_ALIVE);
60                  ctx.write(response);
61              }
62          }
63      }
64  
65      @Override
66      public void channelReadComplete(ChannelHandlerContext ctx) {
67          ctx.flush();
68      }
69  
70      @Override
71      public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) {
72          cause.printStackTrace();
73          ctx.close();
74      }
75  }