download x bytes at a time over network

Jean-Paul Calderone exarkun at
Tue Mar 17 19:47:36 CET 2009

On Tue, 17 Mar 2009 15:17:56 +0000 (UTC), "R. David Murray" <rdmurray at> wrote:
>Jean-Paul Calderone <exarkun at> wrote:
>> On Tue, 17 Mar 2009 12:15:23 +0530, Saurabh <phonethics at> wrote:
>> >> This isn't exactly how things work.  The server *sends* you bytes.  It can
>> >> send you a lot at once.  To some extent you can control how much it sends
>> >> before it waits for you to catch up, but you don't have anywhere near
>> >> byte-level control (you might have something like 32kb or 64kb level
>> >> control).
>> >
>> >What abt in Python3 ?
>> >It seems to have some header like the one below : b'b495 - binary mode
>> >with 46229 bytes ? Or is it something else ?
>> That's just a bug in urllib in Python 3.0.
>What makes you say that's a bug?  Did I miss something?  (Which is entirely

I saw it in the Python issue tracker. :)  Python 3.0 broke handling of
chunked HTTP responses.  Instead of interpreting the chunk length prefixes,
it delivered them as part of the response.


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