1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
|
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.tuscany.sca.contribution.service.util;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.JarURLConnection;
import java.net.URL;
import java.net.URLConnection;
import java.util.jar.JarFile;
public class IOHelper {
/**
* The default buffer size to use.
*/
private static final int DEFAULT_BUFFER_SIZE = 1024 * 4;
/**
* Unconditionally close an <code>InputStream</code>.
* <p>
* Equivalent to {@link InputStream#close()}, except any exceptions will be ignored.
* This is typically used in finally blocks.
*
* @param input the InputStream to close, may be null or already closed
*/
public static void closeQuietly(InputStream input) {
try {
if (input != null) {
input.close();
}
} catch (IOException ioe) {
// ignore
}
}
/**
* Unconditionally close an <code>OutputStream</code>.
* <p>
* Equivalent to {@link OutputStream#close()}, except any exceptions will be ignored.
* This is typically used in finally blocks.
*
* @param output the OutputStream to close, may be null or already closed
*/
public static void closeQuietly(OutputStream output) {
try {
if (output != null) {
output.close();
}
} catch (IOException ioe) {
// ignore
}
}
/**
* Copy bytes from an <code>InputStream</code> to an
* <code>OutputStream</code>.
* <p>
* This method buffers the input internally, so there is no need to use a
* <code>BufferedInputStream</code>.
*
* @param input the <code>InputStream</code> to read from
* @param output the <code>OutputStream</code> to write to
* @return the number of bytes copied
* @throws NullPointerException if the input or output is null
* @throws IOException if an I/O error occurs
* @since Commons IO 1.1
*/
public static int copy(InputStream input, OutputStream output) throws IOException {
byte[] buffer = new byte[DEFAULT_BUFFER_SIZE];
int count = 0;
int n = 0;
while (-1 != (n = input.read(buffer))) { // NOPMD
output.write(buffer, 0, n);
count += n;
}
return count;
}
public static InputStream getInputStream(URL url) throws IOException {
return new SafeURLInputStream(url);
}
/**
* This class is a workaround for URL stream issue as illustrated below.
* InputStream is=url.getInputStream(); is.close(); // This line doesn't close
* the JAR file if the URL is a jar entry like "jar:file:/a.jar!/my.composite" We
* also need to turn off the JarFile cache.
*
* @see http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4950148
*
* @version $Rev$ $Date$
*/
public static class SafeURLInputStream extends InputStream {
private JarFile jarFile;
private InputStream is;
public SafeURLInputStream(URL url) throws IOException {
String protocol = url.getProtocol();
if (protocol != null && (protocol.equals("jar"))) {
JarURLConnection connection = (JarURLConnection)url.openConnection();
// We cannot use cache
connection.setUseCaches(false);
try {
is = connection.getInputStream();
} catch (IOException e) {
throw e;
}
jarFile = connection.getJarFile();
} else {
URLConnection connection = url.openConnection();
connection.setUseCaches(false);
is = connection.getInputStream();
}
}
public SafeURLInputStream(JarURLConnection connection) throws IOException {
// We cannot use cache
connection.setUseCaches(false);
is = connection.getInputStream();
jarFile = connection.getJarFile();
}
@Override
public int available() throws IOException {
return is.available();
}
@Override
public void close() throws IOException {
is.close();
// We need to close the JAR file
if (jarFile != null) {
jarFile.close();
}
}
@Override
public synchronized void mark(int readlimit) {
is.mark(readlimit);
}
@Override
public boolean markSupported() {
return is.markSupported();
}
@Override
public int read() throws IOException {
return is.read();
}
@Override
public int read(byte[] b, int off, int len) throws IOException {
return is.read(b, off, len);
}
@Override
public int read(byte[] b) throws IOException {
return is.read(b);
}
@Override
public synchronized void reset() throws IOException {
is.reset();
}
@Override
public long skip(long n) throws IOException {
return is.skip(n);
}
}
}
|
