1 /* 2 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 /* @test 25 @bug 4334846 26 @summary Make sure zip file comments of various sizes can be written. 27 @author Martin Buchholz 28 */ 29 30 import java.io.*; 31 32 import java.util.zip.ZipEntry; 33 import java.util.zip.ZipFile; 34 import java.util.zip.ZipOutputStream; 35 36 public class Comment { 37 private static final String entryName = "entryName"; 38 private static final String entryContents = "entryContents"; 39 private static final int commentMaxLength = 0xFFFF; 40 private static final int [] commentLengths 41 = { 0, 1, 32768, commentMaxLength - 1, commentMaxLength }; 42 43 public static void main(String argv[]) 44 throws Exception 45 { 46 for (int i = 0; i < commentLengths.length; ++i) { 47 int commentLength = commentLengths[i]; 48 String comment = buildComment(commentLength); 49 String name = "Test" + commentLength + ".zip"; 50 writeZipFile(name, comment); 51 verifyZipFile(name, comment); 52 new File(name).delete(); 53 System.out.println(commentLength + ": successful"); 54 } 55 } 56 57 private static void writeZipFile(String name, String comment) 58 throws IOException 59 { 60 ZipOutputStream zos = new ZipOutputStream(new FileOutputStream(name)); 61 try { 62 zos.setComment(comment); 63 ZipEntry ze = new ZipEntry(entryName); 64 ze.setMethod(ZipEntry.DEFLATED); 65 zos.putNextEntry(ze); 66 new DataOutputStream(zos).writeUTF(entryContents); 67 zos.closeEntry(); 68 } finally { 69 zos.close(); 70 } 71 } 72 73 private static void verifyZipFile(String name, String comment) 74 throws Exception 75 { 76 // Check that Zip entry was correctly written. 77 ZipFile zipFile = new ZipFile(name); 78 ZipEntry zipEntry = zipFile.getEntry(entryName); 79 InputStream is = zipFile.getInputStream(zipEntry); 80 String result = new DataInputStream(is).readUTF(); 81 if (!result.equals(entryContents)) 82 throw new Exception("Entry contents corrupted"); 83 84 // Check that comment length was correctly written. 85 RandomAccessFile file = new RandomAccessFile(name, "r"); 86 file.seek(file.length() - comment.length() 87 - ZipFile.ENDHDR + ZipFile.ENDCOM); 88 int b1 = file.readUnsignedByte(); 89 int b2 = file.readUnsignedByte(); 90 if (b1 + (b2 << 8) != comment.length()) 91 throw new Exception("Zip file comment length corrupted"); 92 93 // Check that comment was correctly written. 94 file.seek(file.length() - comment.length()); 95 byte [] bytes = new byte [comment.length()]; 96 file.readFully(bytes); 97 zipFile.close(); 98 file.close(); 99 if (! comment.equals(new String(bytes, "UTF8"))) 100 throw new Exception("Zip file comment corrupted"); 101 } 102 103 private static String buildComment(int length) { 104 StringBuffer result = new StringBuffer(); 105 while (result.length() < length) { 106 /* Endhdr is 22 bytes long, so this pattern makes it easy 107 * to see if it is copied correctly */ 108 result.append("abcdefghijklmnopqrstuvABCDEFGHIJKLMNOPQRSTUV"); 109 } 110 String string = result.toString(); 111 string = string.substring(string.length() - length); 112 return string; 113 } 114 }