PEP 333 indicates chunked encoding is ok in WSGI apps:
"And, if the server and client both support HTTP/1.1 "chunked
encoding" [3], then the server may use chunked encoding to send a
chunk for each write() call or string yielded by the iterable, thus
generating a Content-Length header for each chunk. This allows the
server to keep the client connection alive, if it wishes to do so.
Note that the server must comply fully with RFC 2616 when doing this,
or else fall back to one of the other strategies for dealing with the
absence of Content-Length."
So really Django's implementation of WSGI (or more specifically, the
middleware design assumptions) appear to be the limitation, not WSGI
itself per se.
regards,
Dave
On Jul 8, 7:42 pm, Malcolm Tredinnick <[EMAIL PROTECTED]>
wrote:
> On Tue, 2008-07-08 at 13:31 -0700, Brogli wrote:
> > Hi,
> > Is there an easy way to get a handle to the output file stream in a
> > Django application? Instead of building an entire response in memory
> > then sending it out, I'd like to send the response in pieces.
>
> Not really (in a reliable way). One constraint is that Django is
> designed to operate seamlessly as a WSGI application and the WSGI
> specification does not permit responses to be streamed in pieces
> ("chunked transfer encoding" in the HTTP 1.1 parlance) from an
> application.
>
> Yes, it's theoretically possible to pass a generator to the
> HttpResponse, but there are lots of technical problems that can arise.
> Some of which are being worked out on the dev list at the moment, some
> of which are just technically impossible (like the WSGI constraint).
>
> Regards,
> Malcolm
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