Wire.java revision 069490a5ca2fd1988d29daf45d892f47ad665115 
1/*
2 * $Header: /home/jerenkrantz/tmp/commons/commons-convert/cvs/home/cvs/jakarta-commons//httpclient/src/java/org/apache/commons/httpclient/Wire.java,v 1.9 2004/06/24 21:39:52 mbecke Exp $
3 * $Revision: 653041 $
4 * $Date: 2008-05-03 03:39:28 -0700 (Sat, 03 May 2008) $
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
31package org.apache.http.impl.conn;
32
33import java.io.IOException;
34import java.io.InputStream;
35import java.io.ByteArrayInputStream;
36import org.apache.commons.logging.Log;
37
38/**
39 * Logs data to the wire LOG.
40 *
41 * @author <a href="mailto:oleg at ural.ru">Oleg Kalnichevski</a>
42 *
43 * @since 4.0
44 */
45public class Wire {
46
47    private final Log log;
48
49    public Wire(Log log) {
50        this.log = log;
51    }
52
53    private void wire(String header, InputStream instream)
54      throws IOException {
55        StringBuilder buffer = new StringBuilder();
56        int ch;
57        while ((ch = instream.read()) != -1) {
58            if (ch == 13) {
59                buffer.append("[\\r]");
60            } else if (ch == 10) {
61                    buffer.append("[\\n]\"");
62                    buffer.insert(0, "\"");
63                    buffer.insert(0, header);
64                    log.debug(buffer.toString());
65                    buffer.setLength(0);
66            } else if ((ch < 32) || (ch > 127)) {
67                buffer.append("[0x");
68                buffer.append(Integer.toHexString(ch));
69                buffer.append("]");
70            } else {
71                buffer.append((char) ch);
72            }
73        }
74        if (buffer.length() > 0) {
75            buffer.append('\"');
76            buffer.insert(0, '\"');
77            buffer.insert(0, header);
78            log.debug(buffer.toString());
79        }
80    }
81
82
83    public boolean enabled() {
84        return log.isDebugEnabled();
85    }
86
87    public void output(InputStream outstream)
88      throws IOException {
89        if (outstream == null) {
90            throw new IllegalArgumentException("Output may not be null");
91        }
92        wire(">> ", outstream);
93    }
94
95    public void input(InputStream instream)
96      throws IOException {
97        if (instream == null) {
98            throw new IllegalArgumentException("Input may not be null");
99        }
100        wire("<< ", instream);
101    }
102
103    public void output(byte[] b, int off, int len)
104      throws IOException {
105        if (b == null) {
106            throw new IllegalArgumentException("Output may not be null");
107        }
108        wire(">> ", new ByteArrayInputStream(b, off, len));
109    }
110
111    public void input(byte[] b, int off, int len)
112      throws IOException {
113        if (b == null) {
114            throw new IllegalArgumentException("Input may not be null");
115        }
116        wire("<< ", new ByteArrayInputStream(b, off, len));
117    }
118
119    public void output(byte[] b)
120      throws IOException {
121        if (b == null) {
122            throw new IllegalArgumentException("Output may not be null");
123        }
124        wire(">> ", new ByteArrayInputStream(b));
125    }
126
127    public void input(byte[] b)
128      throws IOException {
129        if (b == null) {
130            throw new IllegalArgumentException("Input may not be null");
131        }
132        wire("<< ", new ByteArrayInputStream(b));
133    }
134
135    public void output(int b)
136      throws IOException {
137        output(new byte[] {(byte) b});
138    }
139
140    public void input(int b)
141      throws IOException {
142        input(new byte[] {(byte) b});
143    }
144
145    public void output(final String s)
146      throws IOException {
147        if (s == null) {
148            throw new IllegalArgumentException("Output may not be null");
149        }
150        output(s.getBytes());
151    }
152
153    public void input(final String s)
154      throws IOException {
155        if (s == null) {
156            throw new IllegalArgumentException("Input may not be null");
157        }
158        input(s.getBytes());
159    }
160}
161