114 lines
4.4 KiB
Java
114 lines
4.4 KiB
Java
/*
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* Copyright (c) 2003, 2011, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/* @test
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@bug 4334846
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@summary Make sure zip file comments of various sizes can be written.
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@author Martin Buchholz
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*/
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import java.io.*;
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import java.util.zip.ZipEntry;
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import java.util.zip.ZipFile;
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import java.util.zip.ZipOutputStream;
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public class Comment {
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private static final String entryName = "entryName";
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private static final String entryContents = "entryContents";
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private static final int commentMaxLength = 0xFFFF;
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private static final int [] commentLengths
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= { 0, 1, 32768, commentMaxLength - 1, commentMaxLength };
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public static void main(String argv[])
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throws Exception
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{
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for (int i = 0; i < commentLengths.length; ++i) {
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int commentLength = commentLengths[i];
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String comment = buildComment(commentLength);
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String name = "Test" + commentLength + ".zip";
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writeZipFile(name, comment);
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verifyZipFile(name, comment);
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new File(name).delete();
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System.out.println(commentLength + ": successful");
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}
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}
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private static void writeZipFile(String name, String comment)
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throws IOException
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{
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try (FileOutputStream fos = new FileOutputStream(name);
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ZipOutputStream zos = new ZipOutputStream(fos))
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{
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zos.setComment(comment);
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ZipEntry ze = new ZipEntry(entryName);
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ze.setMethod(ZipEntry.DEFLATED);
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zos.putNextEntry(ze);
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new DataOutputStream(zos).writeUTF(entryContents);
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zos.closeEntry();
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}
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}
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private static void verifyZipFile(String name, String comment)
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throws Exception
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{
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// Check that Zip entry was correctly written.
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try (ZipFile zipFile = new ZipFile(name)) {
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ZipEntry zipEntry = zipFile.getEntry(entryName);
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InputStream is = zipFile.getInputStream(zipEntry);
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String result = new DataInputStream(is).readUTF();
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if (!result.equals(entryContents))
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throw new Exception("Entry contents corrupted");
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}
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try (RandomAccessFile file = new RandomAccessFile(name, "r")) {
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// Check that comment length was correctly written.
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file.seek(file.length() - comment.length()
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- ZipFile.ENDHDR + ZipFile.ENDCOM);
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int b1 = file.readUnsignedByte();
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int b2 = file.readUnsignedByte();
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if (b1 + (b2 << 8) != comment.length())
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throw new Exception("Zip file comment length corrupted");
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// Check that comment was correctly written.
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file.seek(file.length() - comment.length());
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byte [] bytes = new byte [comment.length()];
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file.readFully(bytes);
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if (! comment.equals(new String(bytes, "UTF8")))
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throw new Exception("Zip file comment corrupted");
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}
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}
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private static String buildComment(int length) {
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StringBuffer result = new StringBuffer();
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while (result.length() < length) {
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/* Endhdr is 22 bytes long, so this pattern makes it easy
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* to see if it is copied correctly */
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result.append("abcdefghijklmnopqrstuvABCDEFGHIJKLMNOPQRSTUV");
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}
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String string = result.toString();
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string = string.substring(string.length() - length);
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return string;
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}
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}
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