Matthijs Laan created COMPRESS-584:
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Summary: IOUtils.readRange(ReadableByteChannel) can read more 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
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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