Mailman 3 November 2009 - Twisted-web

Test
by Philippe Lafoucrière 05 Aug '21

05 Aug '21

Hi all just a test

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[Athena] Is ReliableMessageDelivery really necessary?
by Paul Thomas 08 Dec '09

08 Dec '09

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?

5 7

Reuse twisted.web resources in nevow
by Mourad Anis 27 Nov '09

27 Nov '09

Hi all my app is entirely writen using twisted.web resources. Now i'm thinking to migrate to nevow, and i'd like to know is it possible to reuse my old resources inside nevow. Would it be possible to write a nevow class that render twisted.web resources. Any examples are welcome. Thanks! Mourad ANIS mourad at janisnet dot com

3 2

How to use Nevow.guard
by Juanjo Conti 25 Nov '09

25 Nov '09

Hi, I'd like to know if there is any example available of how to use this module. I've search the web but didn't find something useful. I've a Nevow app working and I'd like to add user authentication to it. Thanks! -- Juanjo Conti blog: http://www.juanjoconti.com.ar

2 1

Serve Django app from Nevow
by Juanjo Conti 23 Nov '09

23 Nov '09

Can this be done? I have a Twisted app, I serve some pages with Nevow and I have a Django app I'd like to serve as well. Greets! -- Juanjo Conti blog: http://www.juanjoconti.com.ar

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Question about File() and Resource()
by Someone Something 23 Nov '09

23 Nov '09

I'm trying to make a homepage that has a link to a page that was made with file. The only thing that currently works is the File() page. I have absolutely no idea how to do the rest (no, its not homework). Here's my current code: from twisted.web.server import Site from twisted.web.resource import Resource from twisted.internet import reactor from twisted.web.static import File root=Resource() root.putChild("programming", File("/home/dhaivat/")); factory= Site(root) reactor.listenTCP(8080, factory); reactor.run(); How can I implement the home page?

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URL generation for resources
by John Porter Simons 23 Nov '09

23 Nov '09

I need to, given an IResource object that's in a site's resource tree, get its full URL (in order to generate links to it). Looking in twisted/web/resource.py, it appears that URL traversal is strictly one-way, with resources having no idea what their path component is, nor what their parent resource is. 157 def putChild(self, path, child): 158 """Register a static child. 159 160 You almost certainly don't want '/' in your path. If you 161 intended to have the root of a folder, e.g. /foo/, you want 162 path to be ''. 163 """ 164 self.children[path] = child 165 child.server = self.server If putChild were extended a little bit, it could set some info on the child whenever it's "placed" into the tree, i.e. 165+ child.parent = self 165+ child.path = path This would make possible a "getFullPath" method that iterates up the tree to the root, concatenating the parts with "/". Does anyone see the value of this, if I were to subject such a patch? Obviously this is only relevant for statically-routed resources.

1 0

Re: [Twisted-web] Callback help client / server
by Terry Jones 18 Nov '09

18 Nov '09

>>>>> "Chris" == Chris <datarecall(a)hotmail.com> writes: Chris> I am trying to figure out a way so I can access the datareceived Chris> outside of the Echo Class so I can run operations on the data Chris> received. Your protocol knows when it has received something that needs to be acted on. So the simplest possibility is to have the protocol take the action. If that's too simple, you can have the protocol call a method on the factory. So at some point (perhaps in dataReceived) the protocol calls self.factory.doSomething(). Look at the source of twisted.internet.protocols.Factory and you'll see that buildProtocol puts a factory attribute on the newly created protocol instance. The factory can then implement the higher level processing. If that's still not suitable, you can build other options by, e.g., passing something to the factory initializer that it puts onto protocol instances for the protocol to call directly. Take a look at HTTPClientFactory and its HTTPPageGetter protocol in twisted/web/client.py for an instructive example. Terry

1 0

Callback help client / server
by Chris 18 Nov '09

18 Nov '09

from twisted.internet.protocol import Protocol, ClientFactory from sys import stdout from twisted.internet import reactor from misc.configobj import ConfigObj from misc.get_keywords import get_keywords import time import Queue from bing_runner import msn import simplejson as json import base64 from time import sleep class ses(object): def __init__(self,client): print "INITIATED" self.client = client self.main() def act_on(self,msg): print "WE GOT IT BACK" print msg def main(self): print "Downloading List" self.client.sendMessage("get_data\r\n").addCallback(self.act_on) class Echo(Protocol): def connectionMade(self): print "Connected To Server" s = ses(self) def sendMessage(self, msg): print "Sending: %s"%msg self.transport.write(msg) d = defer.Deferred() sleep(5) def dataReceived(self, data): stdout.write(data) self.s.server_data = data return encoded class EchoClientFactory(ClientFactory): protocol = Protocol def startedConnecting(self, connector): print 'Started to connect.' def buildProtocol(self, addr): print 'Connected.' return Echo(); def clientConnectionLost(self, connector, reason): print 'Lost connection. Reason:', reason def clientConnectionFailed(self, connector, reason): print 'Connection failed. Reason:', reason #def clientConnectionLost(self, connector, reason): #connector.connect() # this connects the protocol to a server runing on port 8000 def main(): f = EchoClientFactory() f.protocol = Echo reactor.connectTCP("localhost", 8000, f) reactor.run() # this only runs if the module was *not* imported if __name__ == '__main__': main() I am trying to figure out a way so I can access the datareceived outside of the Echo Class so I can run operations on the data received. Fairly new to twisted. Any help is appreciated _________________________________________________________________ Eligible CDN College & University students can upgrade to Windows 7 before Jan 3 for only $39.99. Upgrade now! http://go.microsoft.com/?linkid=9691819

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Ratnam Chandra wants to stay in touch on LinkedIn
by Ratnam Chandra 14 Nov '09

14 Nov '09

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