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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.snoop;
17  
18  import io.netty.channel.ChannelHandlerContext;
19  import io.netty.channel.SimpleChannelInboundHandler;
20  import io.netty.handler.codec.http.HttpContent;
21  import io.netty.handler.codec.http.HttpHeaderUtil;
22  import io.netty.handler.codec.http.HttpObject;
23  import io.netty.handler.codec.http.HttpResponse;
24  import io.netty.handler.codec.http.LastHttpContent;
25  import io.netty.util.CharsetUtil;
26  
27  public class HttpSnoopClientHandler extends SimpleChannelInboundHandler<HttpObject> {
28  
29      @Override
30      public void messageReceived(ChannelHandlerContext ctx, HttpObject msg) {
31          if (msg instanceof HttpResponse) {
32              HttpResponse response = (HttpResponse) msg;
33  
34              System.err.println("STATUS: " + response.status());
35              System.err.println("VERSION: " + response.protocolVersion());
36              System.err.println();
37  
38              if (!response.headers().isEmpty()) {
39                  for (CharSequence name: response.headers().names()) {
40                      for (CharSequence value: response.headers().getAll(name)) {
41                          System.err.println("HEADER: " + name + " = " + value);
42                      }
43                  }
44                  System.err.println();
45              }
46  
47              if (HttpHeaderUtil.isTransferEncodingChunked(response)) {
48                  System.err.println("CHUNKED CONTENT {");
49              } else {
50                  System.err.println("CONTENT {");
51              }
52          }
53          if (msg instanceof HttpContent) {
54              HttpContent content = (HttpContent) msg;
55  
56              System.err.print(content.content().toString(CharsetUtil.UTF_8));
57              System.err.flush();
58  
59              if (content instanceof LastHttpContent) {
60                  System.err.println("} END OF CONTENT");
61                  ctx.close();
62              }
63          }
64      }
65  
66      @Override
67      public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) {
68          cause.printStackTrace();
69          ctx.close();
70      }
71  }