Mailman 3 November 2005 - 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] 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] Status of wxPython support in Twisted 2.1: use wxreactor
by Itamar Shtull-Trauring 02 Jul '06

02 Jul '06

wxreactor in Twisted 2.1 uses threadedselectreactor. This means that wx apps ought to use wxreactor, not TSR directly; there are some issues with vanilla TSR wx integration that are also present in wxreactor, but will be fixed in future versions of wxreactor. What's broken (there may be more): 1. reactor shutdown events aren't handled correctly (e.g. Deferred returned from during-shutdown event). 2. Signal handling for e.g. Ctrl-C is caught by wx, not twisted. In order to get these fixed I need your help. I have a version of wxreactor that *probably* fixes these in Subversion trunk. You can try it out by running doc/core/examples/wxdemo.py. Hitting Ctrl-C, choosing Exit from the menu or closing the menu all should have the same effect - the application logs "shutting down in 0.3 seconds...", "2", "1", "0" then exits. In addition, "Hello world" should continue to be printed while the dialog box is open or you are holding down a menu. Please try this out, and report success or failure at <http://twistedmatrix.com/bugs/issue1235>. I'm especially interested to hear if it works on Windows or Mac OS X. Please include your OS and version of wxPython/wxWidgets when submitting reports.

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[Twisted-Python] Python 2.2 Support
by Jonathan Lange 27 Dec '05

27 Dec '05

Should we drop Python 2.2 support in Subversion head for Twisted 2.2? - Debian stable now comes with Python 2.3 - Twisted 2.1 has been released with Python 2.2 support Dropping Python 2.2 support has some good consequences: - We get to delete code - An entire class of bugs gets eliminated - Disc space can be freed on the muon buildslave Some bad consequences: - People wanting to run Twisted 2.2 (or svn) on ancient versions of Python won't be able to. cheers, jml

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[Twisted-Python] How can a tcp client connect with multi servers?
by Xu Ryan 02 Dec '05

02 Dec '05

Here is the situation: a tcp control client need connect to multi-agent. Is there a light way to connect with server , instead make a factory to do each connect?

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[Twisted-Python] New to twisted
by Fred Hauck 01 Dec '05

01 Dec '05

I am not only new to twisted, but to python as well. I need what twisted does, so went out and got the "twisted" book by abe fettig. I am coding each example in the book as i get there. the connectiontest.py example on page 16 gives me a call back on success, but not on error. from twisted.internet import reactor,defer, protocol class CallbackAndDisconnectProtocol(protocol.Protocol): def connectionMade(self): self.factory.deferred.callback("Connected!") self.transport.loseConnection() class ConnectionTestFactory(protocol.ClientFactory): protocol = CallbackAndDisconnectProtocol def __init__(self): self.deferred = defer.Deferred() def clientConnnectionFailed(self, connector, reason): self.deferred.errback(reason) def testConnect(host, port): testFactory = ConnectionTestFactory() reactor.connectTCP(host, port, testFactory) return testFactory.deferred def handleSuccess( result,port): print "Connected to port %i" % port reactor.stop() def handleFailure(failure, port): print "Error connecting to port %i: %s" % (port,failure.getErrorMessage()) reactor.stop() if __name__ == "__main__": import sys if not len( sys.argv) == 3: print "Usage: connectiontest.py host port" sys.exit(1) host = sys.argv[1] port = int(sys.argv[2]) connecting = testConnect(host, port) # connecting.addCallback( handleSuccess, port) # connecting.addErrback( handleFailure,port) connecting.addBoth( handleFailure,port) reactor.run() The environment is: Windows XP sp2 python 2.4.1 from activestate twisted_nodocs-2.1.0.win32-py24.exe (installed) When chasing this down, go into the main loop and there are comments about "signals" not working in windows, etc. etc. CallLater works fine, successful callback works fine, the errback does not thanks in advance fred

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[Twisted-Python] My review of Abe's book "Twisted Network Programming Essentials"
by Tommi Virtanen 01 Dec '05

01 Dec '05

Hi. I just finished a review of the new O'Reilly book on Twisted, by Abe Fettig (hi Abe!), and thought you all might be interested in it: http://tv.debian.net/articles/review-snakeball/

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[Twisted-Python] Re: [Twisted-commits] r15230 - Merge of jml/trial-deferred-logic -r15183:15229. Resolves #1341.
by Jean-Paul Calderone 01 Dec '05

01 Dec '05

On Sun, 27 Nov 2005 23:35:45 -0700, Jonathan Lange <jml(a)wolfwood.twistedmatrix.com> wrote: >Author: jml >Date: Sun Nov 27 23:35:45 2005 >New Revision: 15230 > >Modified: > trunk/twisted/mail/test/test_mail.py > trunk/twisted/test/test_ftp.py > trunk/twisted/test/test_ssl.py > trunk/twisted/test/test_tcp.py > trunk/twisted/trial/reporter.py > trunk/twisted/trial/runner.py > trunk/twisted/trial/test/detests.py > trunk/twisted/trial/test/test_deferred.py > trunk/twisted/trial/test/test_failure_formatting.py > trunk/twisted/trial/test/test_keyboard.py > trunk/twisted/trial/test/timeouts.py > trunk/twisted/trial/unittest.py > trunk/twisted/trial/util.py > trunk/twisted/web/test/test_webclient.py >Log: >Merge of jml/trial-deferred-logic -r15183:15229. Resolves #1341. > The Gtk reactor can no longer complete the test suite: http://twistedmatrix.com/buildbot/reactors/builds/884/step-gtk/0 On my machine, the suite hangs in twisted.web.test.test_webclient.CookieTestCase.testNoCookies, but it seems to die in twisted.test.test_tcp.HalfClose2TestCase.testNoNotification on buildbot every time. This may just be a race (or several races) going different ways on a somewhat reliable fashion on the different hardware. It seems like the remaining reactor.iterate() calls are the likely cause of this? Jean-Paul

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[Twisted-Python] implementing scp using Conch
by erick_bodine＠comcast.net 01 Dec '05

01 Dec '05

Using a suggestion from David Mertz's old article I am implementing scp using Conch. I can scp from the server to the client, it does give an exception listed below. Question #1 is why is the exception happening? Question #2 is how to scp from the client to the server? Can I use sendRequest() to open a file and then Channel.write('some data') to send the client file contents? Traceback (most recent call last): File "client_mertz.py", line 80, in ? reactor.run() File "/usr/lib/python2.3/site-packages/twisted/internet/posixbase.py", line 206, in run self.mainLoop() File "/usr/lib/python2.3/site-packages/twisted/internet/posixbase.py", line 214, in mainLoop self.runUntilCurrent() --- <exception caught here> --- File "/usr/lib/python2.3/site-packages/twisted/internet/base.py", line 541, in runUntilCurrent call.func(*call.args, **call.kw) File "/usr/lib/python2.3/site-packages/twisted/internet/base.py", line 397, in _continueSystemEvent for callList in sysEvtTriggers[1], sysEvtTriggers[2]: exceptions.TypeError: unsubscriptable object -- --ERick

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Twisted November 2005