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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.upload;
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.HttpUtil;
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  /**
28   * Handler that just dumps the contents of the response from the server
29   */
30  public class HttpUploadClientHandler extends SimpleChannelInboundHandler<HttpObject> {
31  
32      private boolean readingChunks;
33  
34      @Override
35      public void channelRead0(ChannelHandlerContext ctx, HttpObject msg) {
36          if (msg instanceof HttpResponse) {
37              HttpResponse response = (HttpResponse) msg;
38  
39              System.err.println("STATUS: " + response.status());
40              System.err.println("VERSION: " + response.protocolVersion());
41  
42              if (!response.headers().isEmpty()) {
43                  for (CharSequence name : response.headers().names()) {
44                      for (CharSequence value : response.headers().getAll(name)) {
45                          System.err.println("HEADER: " + name + " = " + value);
46                      }
47                  }
48              }
49  
50              if (response.status().code() == 200 && HttpUtil.isTransferEncodingChunked(response)) {
51                  readingChunks = true;
52                  System.err.println("CHUNKED CONTENT {");
53              } else {
54                  System.err.println("CONTENT {");
55              }
56          }
57          if (msg instanceof HttpContent) {
58              HttpContent chunk = (HttpContent) msg;
59              System.err.println(chunk.content().toString(CharsetUtil.UTF_8));
60  
61              if (chunk instanceof LastHttpContent) {
62                  if (readingChunks) {
63                      System.err.println("} END OF CHUNKED CONTENT");
64                  } else {
65                      System.err.println("} END OF CONTENT");
66                  }
67                  readingChunks = false;
68              } else {
69                  System.err.println(chunk.content().toString(CharsetUtil.UTF_8));
70              }
71          }
72      }
73  
74      @Override
75      public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) {
76          cause.printStackTrace();
77          ctx.channel().close();
78      }
79  }