[
https://issues.apache.org/jira/browse/COMPRESS-477?focusedWorklogId=334811&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-334811
]
ASF GitHub Bot logged work on COMPRESS-477:
-------------------------------------------
Author: ASF GitHub Bot
Created on: 28/Oct/19 08:18
Start Date: 28/Oct/19 08:18
Worklog Time Spent: 10m
Work Description: PeterAlfreadLee commented on issue #84: COMPRESS-477
Add support for extracting splitted zip files
URL: https://github.com/apache/commons-compress/pull/84#issuecomment-546836930
I just pushed the code of adding support for splitted zip in
`ZipArchiveInputStream`.
I didn't change much. Just skip the markers here
https://github.com/apache/commons-compress/blob/205876d6f9eb60ac31f3ec848b23d025f32995ab/src/main/java/org/apache/commons/compress/archivers/zip/ZipArchiveInputStream.java#L370
Sample code for usage guide:
```
File lastFile =
getFile("COMPRESS-477/split_zip_created_by_zip/split_zip_created_by_zip_zip64.zip");
// build the input stream by just concatenating the splitted zips together
SeekableByteChannel channel =
ZipSplitReadOnlySeekableByteChannel.buildFromLastSplitSegment(lastFile);
InputStream inputStream = Channels.newInputStream(channel);
ZipArchiveInputStream splitInputStream = new
ZipArchiveInputStream(inputStream);
ArchiveEntry entry;
while((entry = splitInputStream.getNextEntry()) != null) {
// read from ZipArchiveInputStream
...
}
```
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Issue Time Tracking
-------------------
Worklog Id: (was: 334811)
Time Spent: 1h 50m (was: 1h 40m)
> Support for splitted zip files
> ------------------------------
>
> Key: COMPRESS-477
> URL: https://issues.apache.org/jira/browse/COMPRESS-477
> Project: Commons Compress
> Issue Type: New Feature
> Components: Archivers
> Affects Versions: 1.18
> Reporter: Luís Filipe Nassif
> Priority: Major
> Labels: zip
> Time Spent: 1h 50m
> Remaining Estimate: 0h
>
> It would be very useful to support splitted zip files. I've read
> [https://pkware.cachefly.net/webdocs/casestudies/APPNOTE.TXT] and understood
> that simply concatenating the segments and removing the split signature
> 0x08074b50 from first segment would be sufficient, but it is not that simple
> because compress fails with exception below:
> {code}
> Caused by: java.util.zip.ZipException: archive's ZIP64 end of central
> directory locator is corrupt.
> at
> org.apache.commons.compress.archivers.zip.ZipFile.positionAtCentralDirectory64(ZipFile.java:924)
> ~[commons-compress-1.18.jar:1.18]
> at
> org.apache.commons.compress.archivers.zip.ZipFile.positionAtCentralDirectory(ZipFile.java:901)
> ~[commons-compress-1.18.jar:1.18]
> at
> org.apache.commons.compress.archivers.zip.ZipFile.populateFromCentralDirectory(ZipFile.java:621)
> ~[commons-compress-1.18.jar:1.18]
> at
> org.apache.commons.compress.archivers.zip.ZipFile.<init>(ZipFile.java:295)
> ~[commons-compress-1.18.jar:1.18]
> at
> org.apache.commons.compress.archivers.zip.ZipFile.<init>(ZipFile.java:280)
> ~[commons-compress-1.18.jar:1.18]
> at
> org.apache.commons.compress.archivers.zip.ZipFile.<init>(ZipFile.java:236)
> ~[commons-compress-1.18.jar:1.18]
> {code}
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