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[compress][io] Avoid InputStream#skip?


Hi all

while looking into https://issues.apache.org/jira/browse/COMPRESS-449 I
realized that calling skip on any InputStream probably means you are up
to receiving an IOException because some stream in there decided to
implement skip via seek and now faces a stream that doesn't support
seek. And there is no way you can test for this.

It looks as if commons-io has decided to simple not use skip at all,
IOUtils.skip only uses read. commons-compress IOUtils.skip tries to be
smart with a combination of skip and read but is fooled when the stream
it reads from is System.in and the amount to skip is big enough.

OTOH not using skip but read on a stream that was happy to provide a
proper skip is a severe waste of time.

Any other ideas than playing save and wasting time?

Stefan

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