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1   /*
2    * $HeadURL: https://svn.apache.org/repos/asf/httpcomponents/oac.hc3x/trunk/src/java/org/apache/commons/httpclient/WireLogInputStream.java $
3    * $Revision: 1425331 $
4    * $Date: 2012-12-22 19:29:41 +0100 (Sat, 22 Dec 2012) $
5    *
6    * ====================================================================
7    *
8    *  Licensed to the Apache Software Foundation (ASF) under one or more
9    *  contributor license agreements.  See the NOTICE file distributed with
10   *  this work for additional information regarding copyright ownership.
11   *  The ASF licenses this file to You under the Apache License, Version 2.0
12   *  (the "License"); you may not use this file except in compliance with
13   *  the License.  You may obtain a copy of the License at
14   *
15   *      http://www.apache.org/licenses/LICENSE-2.0
16   *
17   *  Unless required by applicable law or agreed to in writing, software
18   *  distributed under the License is distributed on an "AS IS" BASIS,
19   *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
20   *  See the License for the specific language governing permissions and
21   *  limitations under the License.
22   * ====================================================================
23   *
24   * This software consists of voluntary contributions made by many
25   * individuals on behalf of the Apache Software Foundation.  For more
26   * information on the Apache Software Foundation, please see
27   * <http://www.apache.org/>.
28   *
29   */
30  
31  package org.apache.commons.httpclient;
32  
33  import java.io.FilterInputStream;
34  import java.io.IOException;
35  import java.io.InputStream;
36  
37  /***
38   * Logs all data read to the wire LOG.
39   *
40   * @author Ortwin Gl�ck
41   * @author <a href="mailto:mbowler@GargoyleSoftware.com">Mike Bowler</a>
42   * @author <a href="mailto:oleg@ural.ru">Oleg Kalnichevski</a>
43   * 
44   * @since 2.0
45   */
46  class WireLogInputStream extends FilterInputStream {
47       
48      /*** Original input stream. */
49      private InputStream in;
50  
51      /*** The wire log to use for writing. */
52      private Wire wire;
53      
54      /***
55       * Create an instance that wraps the specified input stream.
56       * @param in The input stream.
57       * @param wire The wire log to use.
58       */
59      public WireLogInputStream(InputStream in, Wire wire) {
60          super(in);
61          this.in = in;
62          this.wire = wire;
63      }
64      /***
65       * 
66       * @see java.io.InputStream#read(byte[], int, int)
67       */
68      public int read(byte[] b, int off, int len) throws IOException {
69          int l = this.in.read(b,  off,  len);
70          if (l > 0) {
71              wire.input(b, off, l);
72          }
73          return l;
74      }
75  
76      /***
77       * 
78       * @see java.io.InputStream#read()
79       */
80      public int read() throws IOException {
81          int l = this.in.read();
82          if (l > 0) { 
83              wire.input(l);
84          }
85          return l;
86      }
87  
88      /***
89       * 
90       * @see java.io.InputStream#read(byte[])
91       */
92      public int read(byte[] b) throws IOException {
93          int l = this.in.read(b);
94          if (l > 0) {
95              wire.input(b, 0, l);
96          }
97          return l;
98      }
99  }