Reader cannot use streams for the seek method

[chekanov]

Hi, David

It looks like the class proio/Reader.java cannot use the method seekToStart for streams (it works only for local files).
This creates a problem for random access of events using URL (the method skip() is not sufficient for this). Can you add a support for streams in the seekToStart() method?

best, Sergei

[decibelcooper]

Hi Sergei (@chekanov). What you describe is inherent to the fundamental design of ProIO. Streams are inherently not seekable, and ProIO has a major focus on being compatible with streams. In order for a stream to become seekable, it must be buffered, either partially or entirely (buffering an entire stream is just downloading, of course).

I tend to agree that supporting stream buffering would be beneficial. I will work on a way to do this that can be applied generally.

Thanks for the Issue, and I'll get back to you on this soon!