Home | History | Annotate | Download | only in tar 
      1 /*
      2  *  Licensed to the Apache Software Foundation (ASF) under one or more
      3  *  contributor license agreements.  See the NOTICE file distributed with
      4  *  this work for additional information regarding copyright ownership.
      5  *  The ASF licenses this file to You under the Apache License, Version 2.0
      6  *  (the "License"); you may not use this file except in compliance with
      7  *  the License.  You may obtain a copy of the License at
      8  *
      9  *      http://www.apache.org/licenses/LICENSE-2.0
     10  *
     11  *  Unless required by applicable law or agreed to in writing, software
     12  *  distributed under the License is distributed on an "AS IS" BASIS,
     13  *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     14  *  See the License for the specific language governing permissions and
     15  *  limitations under the License.
     16  *
     17  */
     18 
     19 package org.apache.commons.compress.archivers.tar;
     20 
     21 import static org.junit.Assert.assertEquals;
     22 import static org.junit.Assert.assertNotNull;
     23 import static org.junit.Assert.assertNull;
     24 
     25 import java.io.BufferedInputStream;
     26 import java.io.InputStream;
     27 import java.util.Random;
     28 
     29 import org.apache.commons.compress.compressors.gzip.GzipCompressorInputStream;
     30 import org.junit.Test;
     31 
     32 public class BigFilesIT {
     33 
     34     @Test
     35     public void readFileBiggerThan8GByteStar() throws Exception {
     36         readFileBiggerThan8GByte("/8.star.tar.gz");
     37     }
     38 
     39     @Test
     40     public void readFileBiggerThan8GBytePosix() throws Exception {
     41         readFileBiggerThan8GByte("/8.posix.tar.gz");
     42     }
     43 
     44     @Test
     45     public void readFileHeadersOfArchiveBiggerThan8GByte() throws Exception {
     46         InputStream in = null;
     47         GzipCompressorInputStream gzin = null;
     48         TarArchiveInputStream tin = null;
     49         try {
     50             in = new BufferedInputStream(BigFilesIT.class
     51                                          .getResourceAsStream("/8.posix.tar.gz")
     52                                          );
     53             gzin = new GzipCompressorInputStream(in);
     54             tin = new TarArchiveInputStream(gzin);
     55             final TarArchiveEntry e = tin.getNextTarEntry();
     56             assertNotNull(e);
     57             assertNull(tin.getNextTarEntry());
     58         } finally {
     59             if (tin != null) {
     60                 tin.close();
     61             }
     62             if (gzin != null) {
     63                 gzin.close();
     64             }
     65             if (in != null) {
     66                 in.close();
     67             }
     68         }
     69     }
     70 
     71     private void readFileBiggerThan8GByte(final String name) throws Exception {
     72         InputStream in = null;
     73         GzipCompressorInputStream gzin = null;
     74         TarArchiveInputStream tin = null;
     75         try {
     76             in = new BufferedInputStream(BigFilesIT.class
     77                                          .getResourceAsStream(name));
     78             gzin = new GzipCompressorInputStream(in);
     79             tin = new TarArchiveInputStream(gzin);
     80             final TarArchiveEntry e = tin.getNextTarEntry();
     81             assertNotNull(e);
     82             assertEquals(8200l * 1024 * 1024, e.getSize());
     83 
     84             long read = 0;
     85             final Random r = new Random(System.currentTimeMillis());
     86             int readNow;
     87             final byte[] buf = new byte[1024 * 1024];
     88             while ((readNow = tin.read(buf, 0, buf.length)) > 0) {
     89                 // testing all bytes for a value of 0 is going to take
     90                 // too long, just pick a few ones randomly
     91                 for (int i = 0; i < 100; i++) {
     92                     final int idx = r.nextInt(readNow);
     93                     assertEquals("testing byte " + (read + idx), 0, buf[idx]);
     94                 }
     95                 read += readNow;
     96             }
     97             assertEquals(8200l * 1024 * 1024, read);
     98             assertNull(tin.getNextTarEntry());
     99         } finally {
    100             if (tin != null) {
    101                 tin.close();
    102             }
    103             if (gzin != null) {
    104                 gzin.close();
    105             }
    106             if (in != null) {
    107                 in.close();
    108             }
    109         }
    110     }
    111 
    112 }
    113