Mailman 3 April 2008 - Twisted

[Twisted-Python] Twisted Python 0.7.0 Prerelease Testing
by Glyph Lefkowitz 05 Aug '21

05 Aug '21

hi there, folks: I'd really like to release 0.7.0 but I would like it to be at least a little bit tested before I do so. Could those of you with CVS trees check everything out and see if it performs as advertised? Deeper bugs than that will have to wait for the next release, but I'd at least like to know if it works for someone other than me. Thanks. ______ __ __ _____ _ _ | ____ | \_/ |_____] |_____| |_____| |_____ | | | | @ t w i s t e d m a t r i x . c o m http://www.twistedmatrix.com/~glyph/

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[Twisted-Python] regarding xml elements
by Raj kumar 02 Oct '13

02 Oct '13

Hi, I have an xml file in my application, I have created an element using Example goes like this......... document.createElement("abc") and i appeneded it by using append() method. But how i can reflect this change to my xml file? and one more thing is i want to create element with some other parameters.... like............. <abc m=" " n=" "> </abc> and i have m and n values as strings with me. can anybody help me to create this element and write it to the existing xml file as a child of an existing element? Thanks in advance.. Raj.. Forgot the famous last words? Access your message archive online at http://in.messenger.yahoo.com/webmessengerpromo.php

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[Twisted-Python] Get IP of connecting client in XMLRPC server
by Remy C. Cool 28 Apr '13

28 Apr '13

Hello, On 18 May 2004, the following message was posted to this mailinglist: Jp Calderone exarkun at divmod.com wrote: >Daniel Newton wrote: > > I have a simple XML-PRC server similar to the example below: > > from twisted.web import xmlrpc, server > > class Example(xmlrpc.XMLRPC): > """An example object to be published.""" > > def xmlrpc_add(self, a, b): > """Return sum of arguments.""" > return a + b def xmlrpc_whatIsMyAddress(self): return self.transport.getPeer().host > > if __name__ == '__main__': > from twisted.internet import reactor > r = Example() > reactor.listenTCP(7080, server.Site(r)) > reactor.run() > > I want to be able to get the address of the client that calls the xmlrpc > method can anyone help me with this? This solution didn't work because 'transport' isn't a property of the Example class. I'm currently in the process of changing from a customized SimpleXMLRPCServer to a twisted XMLRPC server solution and I need to insert the client IP into the attributes passed to the called xmlrpc method. Anyone who knows the answer and is willing to share the info? Regards, Remy

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[Twisted-Python] [RFC] Deprecation Policy
by Jonathan Lange 15 May '08

15 May '08

Hello everyone, Now that the release is out[1], I'd like to start work on fixing #1216 -- official deprecation policy. There's one proposed policy at http://twistedmatrix.com/trac/wiki/CompatibilityPolicy, there's also one mentioned in the ticket itself: deprecate in release N, remove in release N+1. Glyph has at one point expressed a desire for time-based deprecation.[2] I think these are all the questions we need to answer: - Is it time-based or release-based? - How long for? - Do we grade deprecations? How? - Which code is subject to this policy? CompatibilityPolicy suggests release-based deprecation that is graded over 4 releases: release N PendingDeprecationWarning, N+1 DeprecationWarning, N+2 DeprecationError, N+3 remove the functionality. Ticket #1216 suggests a release-based deprecation policy that is not graded and over 1 release: release N, add DeprecationWarning, release N+1, remove the functionality. Important factors to bear in mind: - Maintaining deprecated APIs brings a cost to developers when they maintain code. - Removing APIs brings a cost to users when they choose to upgrade. - We will probably always be changing APIs and making mistakes when we change them. Now, here's what I think. * Release-based, not time-based. Releases are easy to track, dates are less so. This is as true for Twisted programmers as it is for sysadmins & other Twisted users. I think that whatever problems are solved by time-based deprecation are better solved by regular releases. Our releases should, of course, be time-based. But that's another discussion. * Two release deprecation length. That is: release N, DeprecationWarning; release N+1, DeprecationWarning; release N+2, remove the functionality. This is enough to allow users to upgrade their version of Twisted incrementally. Trial has been doing one release for quite a while now, and I can't recall any complaints about breaking compatibility in released code. Micro-releases don't count. * No grading I think the DeprecationWarning vs PendingDeprecationWarning vs DeprecationError is too much hassle. Just say "next release" or "in two releases time". * All "public" code and command-line tools should be covered. Things marked as deprecated at the time of the 8.0 release should be grandfathered so as to be safe for removal. Anything else will get too confusing. The removal of the API stability markers agrees with this. Everything is public unless it starts with one underscore.[3] Most importantly, we should have a policy, we should all agree and as much of the policy as possible should be implemented in Python. This bug has been open for years now, and it is frustrating for the policy to change under one's feet or to disagree with other developers on something so fundamental. "Explicit is better than implicit". I'm sending this now because the 8.0 release is settling down and we have a sprint coming up where it might be easier to resolve this quickly. jml [1] I'm so happy. [2] http://twistedmatrix.com/trac/ticket/2352 [3] This hurts. t.trial.util doesn't begin with an underscore.

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[Twisted-Python] Exit code using twistd
by Miguel Filho 29 Apr '08

29 Apr '08

Hello list, I'm calling my program using twistd, like this: # twistd -y /usr/lib/python2.4/site-packages/apolicy/server.py -q --logfile /var/log/twistd.log --pidfile=/var/run/twistd.pid All right, no problem. But my program makes some tests while starting the service, like loading configuration files, etc. If there is any exception twistd keeps running, so I tried calling reactor.stop(), but I get an RuntimeError saying that it is not possible to stop the reactor because it is not running. So I tried calling sys.exit(1). twistd exits, but the code I'm passing is not returned by twistd, witch returns 0. This messes with my init scripts, so if my user calls 'service mydaemon start' the system will print an 'OK', but twistd will not be running in case of any errors. How can I proceed to avoid this behavior? Regards, Miguel

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[Twisted-Python] Twisted 8.1.0pre2
by Christopher Armstrong 29 Apr '08

29 Apr '08

Hey all. I just put together Twisted 8.1.0pre2, because pre1 had a regression in IOCP. It's been fixed now along with some other updates. Please download it and test your software, especially if you use a non-select-on-unix platform! There have been some reactor changes in this release. http://twistedmatrix.com/users/radix/8.1.0pre2/ Note that many of the files are still 'pre1', because they didn't need any updates. Only the main Twisted distribution, Core, Conch, and Words were updated. -- Christopher Armstrong International Man of Twistery http://radix.twistedmatrix.com/ http://twistedmatrix.com/ http://canonical.com/

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[Twisted-Python] cannot get simple example to run
by klok000＠gmail.com 28 Apr '08

28 Apr '08

Hello everyone. Try as I might I cannot get a very simple example to run. I basically want a server that accepts connections, and periodically issues messages to all clients. The docs for twisted.word says things are in flux so I would rather avoid that and just use a LineReceiver. However right now I can't get anything to work. I start the server and it seems to be happy to sit around and accept connections. However when I run the client it quits (without saying why) and no connection is made. Any help would be very much appreciated. Here's the code, log messages below that. Thanks! Kevin ################################################## # server.py ################################################## import sys from twisted.internet.protocol import log from twisted.internet.protocol import Factory from twisted.internet.protocol import Protocol from twisted.internet import reactor class Echo(Protocol): def connectionMade(self): sys.stderr.write('Server connectionMade\n') self.factory.numProtocols = self.factory.numProtocols+1 if self.factory.numProtocols > 100: self.transport.write("Too many connections, try later") self.transport.loseConnection() def connectionLost(self, reason): sys.stderr.write('Server connectionLost\n') self.factory.numProtocols = self.factory.numProtocols-1 def dataReceived(self, data): sys.stderr.write('Server dataReceived\n') self.transport.write(data) factory = Factory() factory.protocol = Echo log.startLogging(file('server.log', 'w')) sys.stderr.write('Server starting...\n') # 8007 is the port you want to run under. Choose something >1024 reactor.listenTCP(9010, factory) reactor.run() sys.stderr.write('Server done\n') ################################################## # client.py ################################################## import sys from twisted.internet import reactor from twisted.internet.protocol import log from twisted.internet.protocol import Protocol from twisted.internet.protocol import ClientCreator from twisted.internet.protocol import ClientFactory class Greeter(Protocol): def sendMessage(self, msg): sys.stderr.write('Client sendMessage\n') self.transport.write("MESSAGE %s\n" % msg) class GreeterClientFactory(ClientFactory): def startedConnecting(self, connector): sys.stderr.write('Client startedConnecting\n') def buildProtocol(self, addr): sys.stderr.write('Client connected\n') g = Greeter() reactor.callLater(1, g.sendMessage, "This is sent in 1 second") reactor.callLater(2, g.sendMessage, "This is sent in 2 second") reactor.callLater(3, g.sendMessage, "This is sent in 3 second") return Greeter() def clientConnectionLost(self, connector, reason): sys.stderr.write('Client connectionLost: ' + reason + '\n') def clientConnectionFailed(self, connector, reason): sys.stderr.write('Client connectionFailed: ' + reason + '\n') log.startLogging(file('client.log', 'w')) sys.stderr.write('Client connecting...\n') f = GreeterClientFactory() reactor.connectTCP("localhost", 9010, f) sys.stderr.write('Client done\n') ################################################## # client.log ################################################## 2008/04/28 12:38 -0400 [-] Log opened. 2008/04/28 12:38 -0400 [-] Client connecting... 2008/04/28 12:38 -0400 [-] Starting factory <__main__.GreeterClientFactory instance at 0x8354d8c> 2008/04/28 12:38 -0400 [-] Client startedConnecting 2008/04/28 12:38 -0400 [-] Client done ################################################## # server.log ################################################## 2008/04/28 14:41 -0400 [-] Log opened. 2008/04/28 14:41 -0400 [-] Server starting... 2008/04/28 14:41 -0400 [-] twisted.internet.protocol.Factory starting on 9010 2008/04/28 14:41 -0400 [-] Starting factory <twisted.internet.protocol.Factory instance at 0xb7cc18cc>

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[Twisted-Python] Aplication process uid/gid
by Miguel Filho 28 Apr '08

28 Apr '08

Hello list, The code: =============================== import pwd from apolicy.config import config ... from twisted.protocols import basic from twisted.internet import reactor, protocol, task from twisted.application import internet, service ... user = pwd.getpwnam(config.get("main","user")) application = service.Application('apolicy', uid=user[2], gid=user[3]) serviceCollection = service.IServiceCollection(application) address, port = config.get("main", "listen").split(":") internet.TCPServer(int(port), ACLPolicyDaemonFactory(), interface=address).setServiceParent(serviceCollection) =============================== I'm using twistd to start my daemon, the process starts normally and the owner is the user nobody. # ps uaxf | grep nobody nobody 29052 0.1 0.6 13140 6440 ? S 09:11 0:01 /usr/bin/python /usr/bin/twistd -y /usr/lib/python2.4/site-packages/apolicy/server.py -q --logfile /var/log/twistd.log --pidfile=/var/run/twistd.pid My class ACLPolicyDaemonFactory() tries to write a file to test if the path given to my application is writable and has no problems, but the file is created as root. What is the point where the process is already running as nobody? Regards, Miguel

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[Twisted-Python] Fwd: Athena onbeforeunload ?
by Harald Blåtand 27 Apr '08

27 Apr '08

Apologies for cross-posting; don't seem to have any luck with twisted-web. ---------- Forwarded message ---------- From: Harald Blåtand <kozneb(a)gmail.com> Date: Sun, Apr 27, 2008 at 2:58 PM Subject: Athena onbeforeunload ? To: Twisted Web World <twisted-web(a)twistedmatrix.com> Hi all, Trying to have the server know at once when a client goes away. Seemed like function bindEvents of Nevow.Athena.PageWidget would do the trick, but... Checking with alert's in bindEvents() (ok), and function onbeforeunload; however, the latter doesn't seem to get called?? Please, what am I missing here? k

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[Twisted-Python] Problem with Jelly
by Simon Pickles 27 Apr '08

27 Apr '08

Hi, I thought I was following the doc 'Passing Complex Types' but am still getting unsecure Jellies. I've got a file, imported by both pb.Client and pb.Server: #------------------------------------------------ #jellyable.gameObject.py class GameObject: # full of stuff pass class PortableGameObject(GameObject, pb.Copyable): pass class GameObjectReceiver(GameObject, pb.RemoteCopy): pass pb.setUnjellyableForClass(PortableGameObject, GameObjectReceiver) #------------------------------------------------ The client is trying to send an instance of a PortableGameObject thru PB, but the server spits out: twisted.spread.jelly.InsecureJelly: Module jellyable.gameObject not allowed (in type jellyable.gameObject.PortableGameObject). Why does it refer to 'Module jellyable.gameObject'? I know I am sending this thru the pipe: Sat Apr 26 20:06:57 2008 - BROKER: Do Remote Call - target: None, msg: OBJECT_CHANGESECTOR, data: (<jellyable.gameObject.PortableGameObject instance at 0x87bab4c>,) I remember reading that it is crucial to get the naming right on send and receive. How have I got it wrong? Thanks Simon -- http://www.squirtual-reality.com -------------------------------- Linux user #458601 - http://counter.li.org.

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