Taras Ledkov created COMPRESS-254:
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Summary: ZipArchiveOutputStream try to switch to Zip64 when
entries count over 64K entries
Key: COMPRESS-254
URL: https://issues.apache.org/jira/browse/COMPRESS-254
Project: Commons Compress
Issue Type: Bug
Components: Archivers
Affects Versions: 1.6, 1.5, 1.4, 1.3
Environment: Unzip version < 6.0 (without Zip64 support)
Reporter: Taras Ledkov
Since version 1.3 we cannot create zip archive that contains over then 64K
entries & without Zip64 extension.
In case Zip64Mode.AsNeed is used target zip file cannot be open by unzip older
then version 6.0.
In case Zip64Mode.Never is used exception is thrown.
Why so strong restriction as (ZipConstants,ZIP64_MAGIC_SHORT = 0xFFFF) was
happened?
To reproduce you can use dummy test below & [old unzip
binaries|ftp://ftp.info-zip.org/pub/infozip/unix/]:
{code:title=TestHuge}
import org.apache.commons.compress.archivers.zip.ZipArchiveEntry;
import org.apache.commons.compress.archivers.zip.ZipArchiveOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
public class TestHuge {
public static void main(String[] args) throws IOException {
try(OutputStream os = new FileOutputStream(new File("test.zip"));
ZipArchiveOutputStream zos = new ZipArchiveOutputStream(os)) {
zos.setLevel(0);
for (int dirCount = 0; dirCount < 10; ++dirCount) {
ZipArchiveEntry entryDir = new ZipArchiveEntry("dir" + dirCount
+ "/");
zos.putArchiveEntry(entryDir);
zos.closeArchiveEntry();
for (int i = 0; i < 0x4000; ++i) {
ZipArchiveEntry entryFile = new ZipArchiveEntry("dir" +
dirCount + "/" + "file" + i);
zos.putArchiveEntry(entryFile);
zos.write(("" + dirCount + " " + i).getBytes());
zos.closeArchiveEntry();
}
}
zos.finish();
}
}
}
{code}
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