Benji York wrote:
Jeff Rush wrote:
Just checking if I'm missing something -- with the removal of HTTP
streaming/chunking in 3.2, this means that the async bi-directional
persistent socket communications associated with Ajax is NOT possible
at this time?
Don't know if it is or isn't, but that's a novel definition of the "A"
in AJAX that I haven't seen before.
I got the definition from Wikipedia:
development technique for creating interactive web applications."
From the page of the guy that coined the name:
The key points re Zope3 are:
issues an HTTP GET back to Zope3 such that that connection is kept open
indefinitely, and the thread within Zope3 that is servicing that request hangs
around and periodically shoves bits of data (XML, JSON, whatever) down that
provides server => client communications via a brief REQUEST and a neverending
RESPONSE chunked up into pieces representing operations run on the client.
around and issues an HTTP GET/PUT back to Zope3 with a header to keep the
connection open. Over this pipe the client can issue conventional multiple
REQUEST/RESPONSE cycles to invoke functions within the server, providing
client => server communications. However the trick re Zope3 is that the
URL/view to which that request connects must be one that can rendevous with
the thread or a piece of state associated with (1) above, so that the server
and client have a meaningful basis on which to talk.
So far as I can see, Zope3 doesn't provide any way to (1) hang onto a thread
that can send further response data at any time or (2) manage a rendevous with
a thread/context of another HTTP request from the same browser. I think I can
implement (2) but (1) is harder until streaming is added back in. #1 could
also be implemented as some piece of context that is handed to an arbitrary
request-servicing thread each time data becomes available to send to the
client but that approach still needs some element that does computation within
the server and then signals it has data ready to send to the client.
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