1 /* 2 * Copyright (c) 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 4691425 26 * @summary Test the read and write of GZIPInput/OutputStream, including 27 * concatenated .gz inputstream 28 */ 29 30 import java.io.*; 31 import java.util.*; 32 import java.util.zip.*; 33 34 public class GZIPInputStreamRead { 35 public static void main(String[] args) throws Throwable { 36 Random rnd = new Random(); 37 for (int i = 1; i < 100; i++) { 38 int members = rnd.nextInt(10) + 1; 39 40 ByteArrayOutputStream srcBAOS = new ByteArrayOutputStream(); 41 ByteArrayOutputStream dstBAOS = new ByteArrayOutputStream(); 42 for (int j = 0; j < members; j++) { 43 byte[] src = new byte[rnd.nextInt(8192) + 1]; 44 rnd.nextBytes(src); 45 srcBAOS.write(src); 46 47 try (GZIPOutputStream gzos = new GZIPOutputStream(dstBAOS)) { 48 gzos.write(src); 49 } 50 } 51 byte[] srcBytes = srcBAOS.toByteArray(); 52 byte[] dstBytes = dstBAOS.toByteArray(); 53 // try different size of buffer to read the 54 // GZIPInputStream 55 /* just for fun when running manually 56 for (int j = 1; j < 10; j++) { 57 test(srcBytes, dstBytes, j); 58 } 59 */ 60 for (int j = 0; j < 10; j++) { 61 int readBufSZ = rnd.nextInt(2048) + 1; 62 test(srcBytes, 63 dstBytes, 64 readBufSZ, 65 512); // the defualt buffer size 66 test(srcBytes, 67 dstBytes, 68 readBufSZ, 69 rnd.nextInt(4096) + 1); 70 } 71 } 72 } 73 74 private static void test(byte[] src, byte[] dst, 75 int readBufSize, int gzisBufSize) 76 throws Throwable 77 { 78 try (GZIPInputStream gzis = new GZIPInputStream( 79 new ByteArrayInputStream(dst), 80 gzisBufSize)) 81 { 82 byte[] result = new byte[src.length + 10]; 83 byte[] buf = new byte[readBufSize]; 84 int n = 0; 85 int off = 0; 86 87 while ((n = gzis.read(buf, 0, buf.length)) != -1) { 88 System.arraycopy(buf, 0, result, off, n); 89 off += n; 90 // no range check, if overflow, let it fail 91 } 92 if (off != src.length || gzis.available() != 0 || 93 !Arrays.equals(src, Arrays.copyOf(result, off))) { 94 throw new RuntimeException( 95 "GZIPInputStream reading failed! " + 96 ", src.len=" + src.length + 97 ", read=" + off); 98 } 99 } 100 } 101 }