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From "Daniel Lowe (JIRA)" <>
Subject [jira] [Commented] (COMPRESS-189) ZipArchiveInputStream may read 0 bytes when reading from a nested Zip file
Date Sun, 30 Dec 2012 18:32:13 GMT


Daniel Lowe commented on COMPRESS-189:

Yes you can include the test ZIP in Commons Compress. I believe the content is in the public
domain as it comes from the USPTO patent database.
Thanks for fixing this!

On an unrelated topic, I've added the exact changes required to fix COMPRESS-205.

> ZipArchiveInputStream may read 0 bytes when reading from a nested Zip file
> --------------------------------------------------------------------------
>                 Key: COMPRESS-189
>                 URL:
>             Project: Commons Compress
>          Issue Type: Bug
>          Components: Archivers
>    Affects Versions: 1.4.1
>         Environment: JDK 1.6 64-bit, Windows 7
>            Reporter: Daniel Lowe
>            Priority: Blocker
>             Fix For: 1.5
> When the following code is run an error "Underlying input stream returned zero bytes"
is produced. If the commented line is uncommented it can be seen that the ZipArchiveInputStream
returned 0 bytes. This only happens the first time read is called, subsequent calls work as
expected i.e. the following code actually works correctly with that line uncommented!
> The zip file used to produce this behavious is available at
> If this is not the correct way of processing a zip file of zip files please let me know.
Also I believe whilst ZipFile can iterate over entries fast due to being able to look at the
master table whilst ZipArchiveInputStream cannot. Is there anyway of instantiating a ZipFile
from a zip file inside another zip file without first extracting the nested zip file?
>     ZipFile zipFile = new ZipFile("C:/test.ZIP");
>     for (Enumeration<ZipArchiveEntry> iterator = zipFile.getEntries(); iterator.hasMoreElements();
) {
>       ZipArchiveEntry entry = iterator.nextElement();
>       InputStream is = new BufferedInputStream(zipFile.getInputStream(entry));
>       ZipArchiveInputStream zipInput = new ZipArchiveInputStream(is);
>       ZipArchiveEntry innerEntry;
>       while ((innerEntry = zipInput.getNextZipEntry()) != null){
>         if (innerEntry.getName().endsWith("XML")){
>           //;
>           System.out.println(IOUtils.toString(zipInput));
>         }
>       }
>     }

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