[jira] [Work logged] (COMPRESS-584) IOUtils.readRange() can read more from a channel than asked for

["ASF GitHub Bot (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/COMPRESS-584?focusedWorklogId=632759&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-632759 ]

ASF GitHub Bot logged work on COMPRESS-584:
-------------------------------------------

                Author: ASF GitHub Bot
            Created on: 03/Aug/21 08:51
            Start Date: 03/Aug/21 08:51
    Worklog Time Spent: 10m 
      Work Description: matthijsln opened a new pull request #214:
URL: https://github.com/apache/commons-compress/pull/214


   See https://issues.apache.org/jira/browse/COMPRESS-584


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Issue Time Tracking
-------------------

            Worklog Id:     (was: 632759)
    Remaining Estimate: 0h
            Time Spent: 10m

> 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
>            Priority: Major
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> When {{IOUtils.readRange(ReadableByteChannel)}} 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 partially sometimes because {{IOUtils.readRange()}} called {{ZipFile.fromreadCentralDirectoryEntry()}} can read more bytes than asked for.



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