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Posted to issues@commons.apache.org by "Peter Lee (Jira)" <ji...@apache.org> on 2021/09/13 11:47:00 UTC
[jira] [Resolved] (COMPRESS-584) IOUtils.readRange() can read more
from a channel than asked for
[ https://issues.apache.org/jira/browse/COMPRESS-584?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Peter Lee resolved COMPRESS-584.
--------------------------------
Resolution: Fixed
> IOUtils.readRange() can read more from a channel than asked for
> ---------------------------------------------------------------
>
> Key: COMPRESS-584
> URL: https://issues.apache.org/jira/browse/COMPRESS-584
> Project: Commons Compress
> Issue Type: Bug
> Components: Archivers
> Affects Versions: 1.21
> Reporter: Matthijs Laan
> Assignee: Peter Lee
> Priority: Major
> Time Spent: 5h 10m
> Remaining Estimate: 0h
>
> When {{IOUtils.readRange(ReadableByteChannel,int)}} gets less than the number of bytes asked for in the first read call it does not reduce the buffer size for the next read call and may read more than asked for.
> This situation is rare when using a {{FileChannel}} but I wrote a {{SeekableByteChannel}} backed by a URI using HTTP range requests and reading from a socket can often return less bytes than asked for. When I used this channel to read a {{ZipFile}} it only read the ZIP central directory partially sometimes because {{IOUtils.readRange()}} called from {{ZipFile.readCentralDirectoryEntry()}} read more bytes than asked for and it stopped parsing directory entries.
> Fix: [https://github.com/apache/commons-compress/pull/214]
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