Re: Packaging (was Re: Interoperability)
David Megginson wrote: > The problem is > that ZIP is non-streaming -- you have to download the entire zip file > before you can start processing it, since the directory information is > at the end. David Brownell writes: > - The JAR manifest is directory info that's required to be at > the beginning, specifically to avoid downloading the whole > thing before processing it. I wasn't aware that the manifest is required to come first, but that's good to know. I did work on a project a few years ago where we used a JAR-like format to transport mobile agents, and used a decoder that parsed the data stream as it was received; this worked quite well. Something like this could be used with a multi-threaded model without too much difficulty, and the thread requiring data should easily be able to get data once decoded from the stream. > - Maybe someone else knows whether that's actually relied > on, except maybe inside the JDK's class loader. It wouldn't be too hard re-implement for Python. The code we wrote to do it back then was pretty crufty and is too license-encumbered to be useful now. -Fred -- Fred L. Drake, Jr. <fdrake at acm.org> PythonLabs at Zope Corporation
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