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1   //========================================================================
2   //Copyright 2006-2007 Mort Bay Consulting Pty. Ltd.
3   //------------------------------------------------------------------------
4   //Licensed under the Apache License, Version 2.0 (the "License");
5   //you may not use this file except in compliance with the License.
6   //You may obtain a copy of the License at
7   //http://www.apache.org/licenses/LICENSE-2.0
8   //Unless required by applicable law or agreed to in writing, software
9   //distributed under the License is distributed on an "AS IS" BASIS,
10  //WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
11  //See the License for the specific language governing permissions and
12  //limitations under the License.
13  //========================================================================
14  package org.mortbay.jetty.client;
15  
16  import java.io.IOException;
17  
18  import org.mortbay.io.Buffer;
19  import org.mortbay.jetty.HttpFields;
20  
21  /**
22   * An exchange that caches response status and fields for later use.
23   * 
24   * @author gregw
25   *
26   */
27  public class CachedExchange extends HttpExchange
28  {
29      protected int _responseStatus;
30      protected HttpFields _responseFields;
31  
32      public CachedExchange(boolean cacheFields)
33      {
34          if (cacheFields)
35              _responseFields = new HttpFields();
36      }
37  
38      /* ------------------------------------------------------------ */
39      public int getResponseStatus()
40      {
41          if (getStatus() < HttpExchange.STATUS_PARSING_HEADERS)
42              throw new IllegalStateException("Response not received");
43          return _responseStatus;
44      }
45  
46      /* ------------------------------------------------------------ */
47      public HttpFields getResponseFields()
48      {
49          if (getStatus() < HttpExchange.STATUS_PARSING_HEADERS)
50              throw new IllegalStateException("Headers not complete");
51          return _responseFields;
52      }
53  
54      /* ------------------------------------------------------------ */
55      protected void onResponseStatus(Buffer version, int status, Buffer reason) throws IOException
56      {
57          _responseStatus = status;
58          super.onResponseStatus(version,status,reason);
59      }
60  
61      /* ------------------------------------------------------------ */
62      protected void onResponseHeader(Buffer name, Buffer value) throws IOException
63      {
64          if (_responseFields != null)
65              _responseFields.add(name,value);
66          super.onResponseHeader(name,value);
67      }
68  
69  }