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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.client;
17  
18  import io.netty.channel.ChannelFuture;
19  import io.netty.channel.ChannelHandlerContext;
20  import io.netty.channel.SimpleChannelInboundHandler;
21  import io.netty.example.http.snoop.HttpSnoopClientHandler;
22  import io.netty.handler.codec.http.HttpContent;
23  import io.netty.handler.codec.http.HttpHeaders;
24  import io.netty.handler.codec.http.HttpObject;
25  import io.netty.handler.codec.http.HttpResponse;
26  import io.netty.handler.codec.http.LastHttpContent;
27  import io.netty.util.CharsetUtil;
28  
29  import java.util.concurrent.BlockingQueue;
30  import java.util.concurrent.LinkedBlockingQueue;
31  
32  /**
33   * This is a modified version of {@link HttpSnoopClientHandler} that uses a {@link BlockingQueue} to wait until an
34   * HTTPResponse is received.
35   */
36  public class HttpResponseClientHandler extends SimpleChannelInboundHandler<HttpObject> {
37  
38      private final BlockingQueue<ChannelFuture> queue = new LinkedBlockingQueue<ChannelFuture>();
39  
40      @Override
41      public void channelRead0(ChannelHandlerContext ctx, HttpObject msg) throws Exception {
42          if (msg instanceof HttpResponse) {
43              HttpResponse response = (HttpResponse) msg;
44  
45              System.out.println("STATUS: " + response.getStatus());
46              System.out.println("VERSION: " + response.getProtocolVersion());
47              System.out.println();
48  
49              if (!response.headers().isEmpty()) {
50                  for (String name : response.headers().names()) {
51                      for (String value : response.headers().getAll(name)) {
52                          System.out.println("HEADER: " + name + " = " + value);
53                      }
54                  }
55                  System.out.println();
56              }
57  
58              if (HttpHeaders.isTransferEncodingChunked(response)) {
59                  System.out.println("CHUNKED CONTENT {");
60              } else {
61                  System.out.println("CONTENT {");
62              }
63          }
64          if (msg instanceof HttpContent) {
65              HttpContent content = (HttpContent) msg;
66  
67              System.out.print(content.content().toString(CharsetUtil.UTF_8));
68              System.out.flush();
69  
70              if (content instanceof LastHttpContent) {
71                  System.out.println("} END OF CONTENT");
72                  queue.add(ctx.channel().newSucceededFuture());
73              }
74          }
75      }
76  
77      @Override
78      public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) {
79          queue.add(ctx.channel().newFailedFuture(cause));
80          cause.printStackTrace();
81          ctx.close();
82      }
83  
84      public BlockingQueue<ChannelFuture> queue() {
85          return queue;
86      }
87  }