/*
* Copyright (c) 2010, 2011, 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
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* questions.
*/
/* @test
* @bug 4691425
* @summary Test the read and write of GZIPInput/OutputStream, including
* concatenated .gz inputstream
*/
import java.io.*;
import java.util.*;
import java.util.zip.*;
public class GZIPInputStreamRead {
public static void main(String[] args) throws Throwable {
Random rnd = new Random();
for (int i = 1; i < 100; i++) {
int members = rnd.nextInt(10) + 1;
ByteArrayOutputStream srcBAOS = new ByteArrayOutputStream();
ByteArrayOutputStream dstBAOS = new ByteArrayOutputStream();
for (int j = 0; j < members; j++) {
byte[] src = new byte[rnd.nextInt(8192) + 1];
rnd.nextBytes(src);
srcBAOS.write(src);
try (GZIPOutputStream gzos = new GZIPOutputStream(dstBAOS)) {
gzos.write(src);
}
}
byte[] srcBytes = srcBAOS.toByteArray();
byte[] dstBytes = dstBAOS.toByteArray();
// try different size of buffer to read the
// GZIPInputStream
/* just for fun when running manually
for (int j = 1; j < 10; j++) {
test(srcBytes, dstBytes, j);
}
*/
for (int j = 0; j < 10; j++) {
int readBufSZ = rnd.nextInt(2048) + 1;
test(srcBytes,
dstBytes,
readBufSZ,
512); // the defualt buffer size
test(srcBytes,
dstBytes,
readBufSZ,
rnd.nextInt(4096) + 1);
}
}
}
private static void test(byte[] src, byte[] dst,
int readBufSize, int gzisBufSize)
throws Throwable
{
try (ByteArrayInputStream bais = new ByteArrayInputStream(dst);
GZIPInputStream gzis = new GZIPInputStream(bais, gzisBufSize))
{
byte[] result = new byte[src.length + 10];
byte[] buf = new byte[readBufSize];
int n = 0;
int off = 0;
while ((n = gzis.read(buf, 0, buf.length)) != -1) {
System.arraycopy(buf, 0, result, off, n);
off += n;
// no range check, if overflow, let it fail
}
if (off != src.length || gzis.available() != 0 ||
!Arrays.equals(src, Arrays.copyOf(result, off))) {
throw new RuntimeException(
"GZIPInputStream reading failed! " +
", src.len=" + src.length +
", read=" + off);
}
}
}
}