Twisted-web September 2009

twisted-web@python.org

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5 discussions

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Test

by Philippe Lafoucrière

Hi all just a test

5 months, 3 weeks

[Athena] Is ReliableMessageDelivery really necessary?

by Paul Thomas

Hi, I've hit a problem as my app has got bigger (about 30-40 widgets now, all chattering roughly once every 2 seconds) where the reliable message delivery mechanism is spiralling out of control. It seems that the constant back and forth means that large 'baskets' of messages are resent. The more this happens, the busier everything gets until the browser becomes unresponsive. There's a fix for it: [Divmod-dev] athena duplicate messages issue but I'm slightly concerned about the potential for lost messages - and also confused about how this could happen. Given that HTTP is a reliable connection-oriented transport, where is the gap that messages can fall through? I think I can cope with lost messages in most cases, so would it be useful to add a kind of 'sendRemote' that was like 'callRemote' but didn't care about a response? Or maybe this already exists and I've missed it? Paul. P.S. this app is likely to get more noisy - is it likely that I'll have to abandon Athena for Orbited or similar? I mean, are there architectural differences that will prevent Athena scaling?

12 years, 1 month

docFactory at Nevow Elements

by Juanjo Conti

I am using Nevow's LiveElements and I am gettings troubles with the docFactory attribute. In the examples I've seen, docFactory = loaders.stan(...) I'd like to load a string representing my html page[0] Can this be done? I really don't like stan :) Greets! [0] I generate the string using Django's templates systems' render_to_string function. -- Juanjo Conti blog: http://www.juanjoconti.com.ar

12 years, 3 months

twisted.web: returning dynamically generated images as image/png

by Jussi Rasinmäki

I have the following setup (see below), in which the render method of a RasterServer instance is responsible for generating a png file data in memory that then should be passed on to the client that made the request. However, I can't get my head around how to define the content-type for the render method result? Or whether that's possible at all? If not, how should I define my RasterServer so that it would return image/png content to the client? Cheers, Jussi ======================================== from twisted.web import resource, static, server from twisted.application import service, strports ... root = resource.Resource() ... raster = RasterServer() root.putChild('wms', raster) ... application = service.Application('test') mo_server = strports.service(where, server.Site(root)) mo_server.setServiceParent(application) ---------------- class RasterServer(resource.Resource): def render(self, request): ....

12 years, 4 months

t.w.x.XMLRPC with Basic Auth

by Clay Gerrard

Hello, This example over-rides render (which I could probably do, but it seems like cheating): http://code.activestate.com/recipes/526625/ This example is over my head (my zope.interfaces foo is weak): http://twistedmatrix.com/pipermail/twisted-web/2007-May/003377.html and also possibly dated? twisted.web2.auth.wrapper.HTTPAuthResouce vs. twisted.web._auth.wrapper.HTTPAuthSessionWrapper Is anyone aware of any other examples I could consider? Clay Gerrard Office: 210-312-3443 Mobile: 210-788-9431 Confidentiality Notice: This e-mail message (including any attached or embedded documents) is intended for the exclusive and confidential use of the individual or entity to which this message is addressed, and unless otherwise expressly indicated, is confidential and privileged information of Rackspace. Any dissemination, distribution or copying of the enclosed material is prohibited. If you receive this transmission in error, please notify us immediately by e-mail at abuse(a)rackspace.com, and delete the original message. Your cooperation is appreciated.

12 years, 4 months

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Twisted-web September 2009