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/*
* Copyright (c) 2022, 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 8292327
* @summary Test the case where Inflater.needsInput() is true but the native
* inflater still has unwritten output in its internal buffer.
*/
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.util.zip.Deflater;
import java.util.zip.DeflaterInputStream;
import java.util.zip.Inflater;
import java.util.zip.InflaterInputStream;
public class UnexpectedEndOfZlibStream {
public static void main(String[] args) throws Exception {
String original = "Readsuncompresseddataintoanarrayofbytes0123456789Ifcodelenis" +
"notzerothemethodwillblockReadsuncompresseddataintoanarrayofbytes123456789";
byte[] deflated =
new DeflaterInputStream(
new ByteArrayInputStream(original.getBytes("US-ASCII")),
new Deflater(Deflater.DEFAULT_COMPRESSION, /*nowrap=*/ true)
).readAllBytes();
// using readAllBytes succeeds, the underlying gzip data seems to be well-formed
byte[] inflated =
new InflaterInputStream(
new ByteArrayInputStream(deflated),
new Inflater(/*nowrap=*/ true)
).readAllBytes();
if (!original.equals(new String(inflated, "US-ASCII"))) {
throw new Exception("Inflated output differs from original");
}
// a 128 byte read followed by a 512 byte read fails after JDK-8281962
InflaterInputStream is =
new InflaterInputStream(
new ByteArrayInputStream(deflated),
new Inflater(/*nowrap=*/ true));
byte[] buf = new byte[512];
int n = is.read(buf, 0, 128);
int pos = n;
while (n > 0) {
if ((n = is.read(buf, pos, 1)) > 0) { // Unexpected end of ZLIB input stream
pos+= n;
}
}
if (!original.equals(new String(buf, 0, pos, "US-ASCII"))) {
throw new Exception("Inflated output differs from original");
}
}
}
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