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https://issues.apache.org/jira/browse/COMPRESS-491?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Stefan Bodewig updated COMPRESS-491:
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Component/s: Archivers
> Deflate64CompressorInputStream.read(byte[]) works incorrectly
> -------------------------------------------------------------
>
> Key: COMPRESS-491
> URL: https://issues.apache.org/jira/browse/COMPRESS-491
> Project: Commons Compress
> Issue Type: Bug
> Components: Archivers
> Affects Versions: 1.18
> Reporter: Juha Syrjälä
> Priority: Major
> Fix For: 1.20
>
>
> read(byte[]) method in
> org.apache.commons.compress.compressors.deflate64.Deflate64CompressorInputStream
> return incorrectly value 0 sometimes:
> https://docs.oracle.com/javase/7/docs/api/java/io/InputStream.html#read(byte[])
> > Reads some number of bytes from the input stream and stores them into the
> > buffer array b. The number of bytes actually read is returned as an
> > integer. This method blocks until input data is available, end of file is
> > detected, or an exception is thrown.
> If the length of b is zero, then no bytes are read and 0 is returned;
> otherwise, there is an attempt to read at least one byte. If no byte is
> available because the stream is at the end of the file, the value -1 is
> returned; otherwise, at least one byte is read and stored into b.
> The first byte read is stored into element b[0], the next one into b[1], and
> so on. The number of bytes read is, at most, equal to the length of b. Let k
> be the number of bytes actually read; these bytes will be stored in elements
> b[0] through b[k-1], leaving elements b[k] through b[b.length-1] unaffected.
> This means that `read` method can return `0` only when zero length byte array
> is passed in.
> Otherwise read must block until there is at least 1 byte of data available,
> or return -1 for end of stream.
> Currently in commons-compress 1.18, class
> org.apache.commons.compress.compressors.deflate64.Deflate64CompressorInputStream
> returns `0` for some buffer sizes and some Zip files.
> See [https://github.com/jsyrjala/apache-commons-compress-bug] for test case
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