Mailman 3 December 2006 - 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] 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] Reconnecting PB Client
by Don Smith 12 Sep '07

12 Sep '07

Does anyone have some example code for building a reconnecting PB client? This is what I have now: from twisted.spread import pb from twisted.internet import reactor from twisted.python import util events = pb.PBClientFactory() reactor.connectTCP("localhost", 8789, events) queue = events.getRootObject()

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[Twisted-Python] Producers / Consumers and more examples tutorials?
by jarrod roberson 13 Mar '07

13 Mar '07

Are there any more concrete examples or tutorials of using Producers and Consumers?

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[Twisted-Python] Support for ICMP ping?
by Nicolas D. Cesar 08 Feb '07

08 Feb '07

I've been googling if there is any 'ICMP ping' support in Twisted. I've encounter ancient replies: http://twistedmatrix.com/pipermail/twisted-python/2003-August/005542.html I wonder if today is any ICMP support. I've tried to search the source tree[1], and doesn't seem. My actual needs is creating a DeferredList with "ping-testers" for different IPs, just to check if there up or not. I know I can end up using twisted.internet.utils.getProcessOutput and calling ping, as I would normally do from command line. For other newbies as me in the same situation please read: http://twistedmatrix.com/users/moshez/talk.html and search for 'getProcessOutput' ;-) Greetings, [1] my search was: -------------------------------------------------------------------- $ grep -C3 -ir icmp * internet/protocol.py- internet/protocol.py- internet/protocol.py-class AbstractDatagramProtocol: internet/protocol.py: """Abstract protocol for datagram-oriented transports, e.g. IP, ICMP, ARP, UDP.""" internet/protocol.py- internet/protocol.py- transport = None internet/protocol.py- numPorts = 0 -- internet/protocol.py- def connectionRefused(self): internet/protocol.py- """Called due to error from write in connected mode. internet/protocol.py- internet/protocol.py: Note this is a result of ICMP message generated by *previous* internet/protocol.py- write. internet/protocol.py- """ internet/protocol.py- -------------------------------------------------------------------- -- Nicolás D. César <ncesar(a)lunix.com.ar> Lunix S.R.L. -[ http://www.lunix.com.ar ]- GnuPG Public Key: gpg --keyserver wwwkeys.pgp.net --recv-key 0x3606F3E6

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[Twisted-Python] Problem: spawnProcess() never ending when installSignalHandlers=False
by Matt Feifarek 03 Feb '07

03 Feb '07

Hello. I'm using Twisted 1.3.0 on python2.4 on an Ubuntu-Hoary x86 Linux box. I'm using twisted and spawnProcess() with a Queue structure to chain processes that need to be called (specifically, imagemagick commands). I use the "processEnded" event/method of t.i.p.ProcessProtocol to go from one task to the next. Twisted shares a python process with a multi-threaded web-app-kit (Webware) so it has to be run in a thread. This worked well on other older versions of twisted and older versions of python; also on linux. I've tracked down the problem to be twisted itself (or my incorrect use of it) rather than my code. This example illustrates it: ------------------------------------------------- from twisted.internet import reactor from twisted.internet.protocol import ProcessProtocol class MyProt( ProcessProtocol ): def processEnded(self, reason): print "ended.", reason executable = '/bin/touch' args = ( '/tmp/foo.txt', ) args = (executable,) + tuple(args) reactor.spawnProcess( MyProt(), executable, args ) reactor.callLater( 5, reactor.stop ) #reactor.run() reactor.run(installSignalHandlers=False) ------------------------------------------------- As is, this code never runs the "processEnded()" method of MyProt(). If I change the reactor.run() parameter to leave the signal handlers on, it works. Note that I need to leave the signal handlers turned off because I can't run the reactor in the main thread; Webware needs that. I also know that the subprocess is giving up its file descriptors; I can see that if I put more print statements into MyProt(). And I know that the subprocess is working; /tmp/foo.txt is there. It seems that somehow the reactor is using signals to notice when a process has ended; this makes a certain ammount of sense intuitively, though I don't understand the nitty-gritty of processes and signals at all. And more importantly, this has worked before on other combinations of twisted/python. Is this a bug? If so, has it been fixed? If not, what should I do to detect when a spawned process is finished? Thanks very much. Twisted rocks.

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[Twisted-Python] Authentication with multiple handshakes
by Alvin Wang 19 Jan '07

19 Jan '07

http://twistedmatrix.com/projects/core/documentation/howto/pb-cred.html The documentation above says that credentials should be able to do authentication with multiple passes. However, I have not been able to find any examples of it. As an alternative, I was going to implement a user object with state that determined what it was able to do. I could force the client to conduct multiple challenge responses to achieve the logged in state. I figured it would be better to ask the mail list for the proper way to do it first. Thanks -- Alvin

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[Twisted-Python] pidfile in twistd
by William Hanwoody 31 Dec '06

31 Dec '06

when I run a service through twistd # twistd --pidfile service.pid -y service.py in logfile, I see: Warning: No permission to delete pid file Because I run this service as ordinary user, not root: application = service.Application("serviceMine", uid, gid) , but the owner of pidfile is still root, not ordinary user! so when I shutdown this service, this pid file cannot be deleted! -- _______________________________________________________________ William Hanwoody hanwoody(a)gmail.com A senior Linux engineer, like system integrate My blog - hanwoody.livejournal.com _______________________________________________________________

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[Twisted-Python] script can be used as namespace?
by Steve Han 31 Dec '06

31 Dec '06

I am working on an example: from twisted.internet.app import Application from twisted.internet.protocol import Protocol, Factory class Fibonacci(Protocol): """Serve a sequence of Fibonacci numbers to all requesters""" def dataReceived(self, data): self.factory.new = self.factory.a + self.factory.b self.transport.write('%d' % self.factory.new) self.factory.a = self.factory.b self.factory.b = self.factory.new def main(): import fib_server # Use script as namespace f = Factory() f.protocol = fib_server.Fibonacci f.a, f.b = 1, 1 application = Application("Fibonacci") application.listenTCP(8888, f) application.save() if'__main__' == __name__: main() I have questions as the following: 1. Is application.save( ) that make Fibonacci.tap file? 2. testing on "twistd -f Fibonacci.tap" got message "Failed to load application: No module named fib_server".Can we use script as namesp? -- Steve Han

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[Twisted-Python] I am not sure where is best to post?
by Steve Han 30 Dec '06

30 Dec '06

twisted-python/twisted-python-request or twisted-web?? My questions are about programming-related. Thanks a lot. -- Steve Han

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