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https://issues.apache.org/jira/browse/COMPRESS-477?focusedWorklogId=334674&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-334674
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ASF GitHub Bot logged work on COMPRESS-477:
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Author: ASF GitHub Bot
Created on: 28/Oct/19 01:35
Start Date: 28/Oct/19 01:35
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-546759238
@bodewig Thank you. Please take your time.
> We could either allow people using ZipArchiveInputStream to signal it
should skip the marker or provide a "collecting stream" that skipped the first
four bytes if necessary.
I prefer with the previous implemention by skipping the marker. I tested
with the the second implemention of providing a "collecting stream" that
skipped the first four bytes if necessary, and it doesn't work well and got
garbled content when dealing with files that is located in 2 split segments. I
don't know why it's like this, but I believe it's the `Inflater` in JVM has
taken the marker into consideration.
I will push the part of `ZipArchiveInputStream` and corresponding testcases
in my branch today.
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Issue Time Tracking
-------------------
Worklog Id: (was: 334674)
Time Spent: 1h (was: 50m)
> 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
> 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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