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https://issues.apache.org/jira/browse/COMPRESS-584?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Matthijs Laan updated COMPRESS-584:
-----------------------------------
Description:
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]
was:
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.fromreadCentralDirectoryEntry()}} read more bytes than asked for and
it stopped parsing directory entries.
Fix: [https://github.com/apache/commons-compress/pull/214]
> 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,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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