[Twisted-web] Implementing hanging get with twisted web
exarkun at divmod.com
Sat Nov 11 13:16:13 CST 2006
On Sat, 11 Nov 2006 11:06:07 -0800, joe kim <joe.kim at gmail.com> wrote:
>I had a question about implementing hanging-gets. A hanging get is
>basically when the server "hangs" onto the http request until either a
>certain period of time or until there is an event is triggered. It is
>a hack for implementing event driven messaging on top of HTTP.
>Alex Russell references it in his blog: http://alex.dojotoolkit.org/?p=545
>What's the best way to implement hanging-gets using twisted? I have a
>web page that I want to immediately update everytime there is a change
>continually made asynchronous requests to the server and the server
>implemented hanging-gets, then that would be a good solution.
>Any thoughts are appreciated.
The basic mechanism in twisted.web which this relies on is a renderHTTP
method which returns NOT_DONE_YET and arranges for request.finish() to
be called at some later time.
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