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1   /*
2    *  Licensed to the Apache Software Foundation (ASF) under one or more
3    *  contributor license agreements.  See the NOTICE file distributed with
4    *  this work for additional information regarding copyright ownership.
5    *  The ASF licenses this file to You under the Apache License, Version 2.0
6    *  (the "License"); you may not use this file except in compliance with
7    *  the License.  You may obtain a copy of the License at
8    *
9    *      http://www.apache.org/licenses/LICENSE-2.0
10   *
11   *  Unless required by applicable law or agreed to in writing, software
12   *  distributed under the License is distributed on an "AS IS" BASIS,
13   *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14   *  See the License for the specific language governing permissions and
15   *  limitations under the License.
16   *
17   */
18  
19  package org.apache.commons.compress.archivers.zip;
20  
21  import static org.apache.commons.compress.AbstractTestCase.getFile;
22  
23  import java.io.File;
24  import java.io.FileInputStream;
25  import java.io.IOException;
26  
27  import junit.framework.TestCase;
28  
29  import org.apache.commons.compress.archivers.ArchiveEntry;
30  
31  /**
32   * JUnit 3 testcase for a multi-volume zip file.
33   *
34   * Some tools (like 7-zip) allow users to split a large archives into 'volumes'
35   * with a given size to fit them into multiple cds, usb drives, or emails with
36   * an attachment size limit. It's basically the same file split into chunks of
37   * exactly 65536 bytes length. Concatenating volumes yields exactly the original
38   * file. There is no mechanism in the ZIP algorithm to accommodate for this.
39   * Before commons-compress used to enter an infinite loop on the last entry for
40   * such a file. This test is intended to prove that this error doesn't occur
41   * anymore. All entries but the last one are returned correctly, the last entry
42   * yields an exception.
43   *
44   */
45  public class Maven221MultiVolumeTest extends TestCase {
46  
47      private static final String [] ENTRIES = new String [] {
48          "apache-maven-2.2.1/",
49          "apache-maven-2.2.1/LICENSE.txt",
50          "apache-maven-2.2.1/NOTICE.txt",
51          "apache-maven-2.2.1/README.txt",
52          "apache-maven-2.2.1/bin/",
53          "apache-maven-2.2.1/bin/m2.conf",
54          "apache-maven-2.2.1/bin/mvn",
55          "apache-maven-2.2.1/bin/mvn.bat",
56          "apache-maven-2.2.1/bin/mvnDebug",
57          "apache-maven-2.2.1/bin/mvnDebug.bat",
58          "apache-maven-2.2.1/boot/",
59          "apache-maven-2.2.1/boot/classworlds-1.1.jar",
60          "apache-maven-2.2.1/conf/",
61          "apache-maven-2.2.1/conf/settings.xml",
62          "apache-maven-2.2.1/lib/"
63      };
64  
65      private static final String LAST_ENTRY_NAME =
66          "apache-maven-2.2.1/lib/maven-2.2.1-uber.jar";
67  
68      public void testRead7ZipMultiVolumeArchiveForStream() throws IOException {
69  
70          FileInputStream archive =
71              new FileInputStream(getFile("apache-maven-2.2.1.zip.001"));
72          ZipArchiveInputStream zi = null;
73          try {
74              zi = new ZipArchiveInputStream(archive,null,false);
75  
76              // these are the entries that are supposed to be processed
77              // correctly without any problems
78              for (String element : ENTRIES) {
79                  assertEquals(element, zi.getNextEntry().getName());
80              }
81  
82              // this is the last entry that is truncated
83              ArchiveEntry lastEntry = zi.getNextEntry();
84              assertEquals(LAST_ENTRY_NAME, lastEntry.getName());
85              byte [] buffer = new byte [4096];
86  
87              // before the fix, we'd get 0 bytes on this read and all
88              // subsequent reads thus a client application might enter
89              // an infinite loop after the fix, we should get an
90              // exception
91              try {
92                  while (zi.read(buffer) > 0) { }
93                  fail("shouldn't be able to read from truncated entry");
94              } catch (IOException e) {
95                  assertEquals("Truncated ZIP file", e.getMessage());
96              }
97  
98              // and now we get another entry, which should also yield
99              // an exception
100             try {
101                 zi.getNextEntry();
102                 fail("shouldn't be able to read another entry from truncated"
103                      + " file");
104             } catch (IOException e) {
105                 // this is to be expected
106             }
107         } finally {
108             if (zi != null) {
109                 zi.close();
110             }
111         }
112     }
113 
114     public void testRead7ZipMultiVolumeArchiveForFile() throws IOException {
115         File file = getFile("apache-maven-2.2.1.zip.001");
116         try {
117             new ZipFile(file);
118             fail("Expected ZipFile to fail");
119         } catch (IOException ex) {
120             // expected
121         }
122     }
123 }