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/*
* Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/* @test
* @bug 7021870 8023431 8026756
* @summary Reading last gzip chain member must not close the input stream.
* Garbage following gzip entry must be ignored.
*/
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.zip.GZIPInputStream;
import java.util.zip.GZIPOutputStream;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;
import java.util.zip.ZipOutputStream;
public class GZIPInZip {
public static void main(String[] args)
throws Throwable {
doTest(false, false);
doTest(false, true);
doTest(true, false);
doTest(true, true);
}
private static void doTest(final boolean appendGarbage,
final boolean limitGISBuff)
throws Throwable {
byte[] buf;
try (ByteArrayOutputStream baos = new ByteArrayOutputStream();
ZipOutputStream zos = new ZipOutputStream(baos)) {
final byte[] xbuf = { 'x' };
zos.putNextEntry(new ZipEntry("a.gz"));
GZIPOutputStream gos1 = new GZIPOutputStream(zos);
gos1.write(xbuf);
gos1.finish();
if (appendGarbage)
zos.write(xbuf);
zos.closeEntry();
zos.putNextEntry(new ZipEntry("b.gz"));
GZIPOutputStream gos2 = new GZIPOutputStream(zos);
gos2.write(xbuf);
gos2.finish();
zos.closeEntry();
zos.flush();
buf = baos.toByteArray();
}
try (ByteArrayInputStream bais = new ByteArrayInputStream(buf);
ZipInputStream zis = new ZipInputStream(bais)) {
zis.getNextEntry();
GZIPInputStream gis1 = limitGISBuff ?
new GZIPInputStream(zis, 4) :
new GZIPInputStream(zis);
// try to read more than the entry has
gis1.skip(2);
try {
zis.getNextEntry();
} catch (IOException e) {
throw new RuntimeException("ZIP stream was prematurely closed", e);
}
}
}
}
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