Mailman 3 June 2005 - Twisted

[Twisted-Python] Twisted Python 0.7.0 Prerelease Testing
by Glyph Lefkowitz Aug. 5, 2021

Aug. 5, 2021

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 April 28, 2013

April 28, 2013

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 Feb. 3, 2007

Feb. 3, 2007

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] Traceback from pb-Server
by Stephan Popp Sept. 6, 2005

Sept. 6, 2005

Hi, Please excuse my bad english, I hope you will understand what I mean, otherwise feel free to ask. I'm trying to get error messages from my server. I'm using twisted 2.0.0 with python 2.4. The server looks like this: from twisted.spread import pb from twisted.internet import reactor, threads class ServerObject(pb.Root): #...some other methods, which aren't involved... def remote_fitness(self, task, taskDescription, serverID): return threads.deferToThread(self.calc, task, serverID, taskDescription) def calc(self, task, serverID, taskDescription): exec('from %s import %s as func' % (taskDescription.fileName,taskDescription.functionName)) #problem: file specified in fileName needn't to be in working directory of server func(task) #calulates something return task if __name__ == '__main__': factory = pb.PBServerFactory(ServerObject()) reactor.listenTCP(8800, factory) reactor.run() The client calls, after connection is made. def1 = root.call_remote("fitness", task, taskDescription, serverID) def1.addCallback(self.serverCB) def1.addErrback(self.serverErrorCB) def serverErrorCB(self, reason): print reason If the pythonscript named taskDescription.fileName isn't there self.serverErrorCB is called - thats ok. But it prints: reason [Failure instance: Traceback from remote host -- Traceback unavailable] But I need to know why the call failed. Can anyone please help me to get the traceback or the exception message that the server prints (exceptions.ImportError: No module named fitfunc2).

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[Twisted-Python] Passing arguments to application
by Stephan Popp July 1, 2005

July 1, 2005

Hi, maybe I haven't searched enough, but I don't find anything that halps me to solve my problem. I've got a serverapplication. The problem is in the following lines: application = service.Application("TwistedServerApp") internet.TCPServer(8800, pb.ServerFactory...) I don't want to start this with a predetermined port. More like: twistd -y TwistedServerApp.tac 8800 Is this somehow possible? sys.argv seems impossible to use. -Stephan

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[Twisted-Python] Weekly Bug Summary
by James Y Knight June 30, 2005

June 30, 2005

Bug summary ______________________ Since 2005-06-22 16:16:07.550000: Bugs opened: 5 Bugs closed: 5 Total open bugs: 396 (+0) Urgent: 9 (+0) Bug: 168 (+1) Feature: 143 (-1) Wish: 76 (+0) New / Reopened Bugs ______________________ ==== Urgent ==== Error in DelayedCall.__str__ (2 days ago) CLOSED http://twistedmatrix.com/bugs/issue1094 opened by bruce ==== Bug ==== [FTP] FTPClient does not handle multi-line responses properly (5 days ago) http://twistedmatrix.com/bugs/issue1093 opened by orbitz ==== Feature ==== Adding support for rotation on a fixed numlber of logs (yesterday) http://twistedmatrix.com/bugs/issue1095 opened by lstep [DOCUMENTATION, WIN32] Creating standalone twisted win32 executables using py2exe (6 days ago) http://twistedmatrix.com/bugs/issue1092 opened by vertigo ==== Wish ==== Tab in twisted/python/failure.py (6 days ago) CLOSED http://twistedmatrix.com/bugs/issue1091 opened by bruce Bugs Closed ______________________ ==== Urgent ==== Error in DelayedCall.__str__ (2 days ago) http://twistedmatrix.com/bugs/issue1094 opened by bruce, closed by exarkun ==== Feature ==== [CHAT] update words to use newcred (21 months ago) http://twistedmatrix.com/bugs/issue270 opened by acapnotic, closed by exarkun [WORDS] Remove Words' use of deprecated t.web.widgets (1 month ago) http://twistedmatrix.com/bugs/issue1033 opened by exarkun, closed by exarkun [WORDS] Update words to new PB API (1 month ago) http://twistedmatrix.com/bugs/issue1032 opened by exarkun, closed by exarkun ==== Wish ==== Tab in twisted/python/failure.py (6 days ago) http://twistedmatrix.com/bugs/issue1091 opened by bruce, closed by exarkun

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[Twisted-Python] Is it possible to write a tcp app which behaves like both client and server?
by Eric Hsu June 29, 2005

June 29, 2005

Hi all! Sorry for my poor english, I'll try to express myself clearly :p I need to implement something like this: * it listens on a port 12345 for only one incoming connection if there is currently no connection * it can also connect to other host from that port (12345) if there is currently no connection Or: Could I write a server which can connect (from the port it's listening on) to another known server? Could these be done with twisted? Any infomatin would be warmly welcome, big thanks! - Eric

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[Twisted-Python] Limiting number of concurrent client connections
by Toby Dickenson June 28, 2005

June 28, 2005

Im finding that Win32Reactor raises an exception on every iteration of the main loop if I exceed the limit of 64 WaitForMultipleObjects. I would prefer to avoid this fairly obvious denial-of-service problem by limiting the number of concurrent client connections. Is there a standard solution for this? Thanks in advance, -- Toby Dickenson

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[Twisted-Python] loading application files from zip files for frozen exes
by Grant McDonald June 27, 2005

June 27, 2005

Hi All, When packaging a twisted server implementation with py2exe that uses .tac (.py) files one ends up with a zip file with all the python dependencies (as .pyo bytecode), an .exe and the .tac files in the package directory. To me this seems a bit messy since the distribution is by definition a 'frozen' exe and any changes to the python modules in the zip will require a rebuild. With this limitation in mind I initially wrote several patches to twisted core modules to allow an application to be loaded from a zip file (only .py modules) which i attached to issue 1092 (http://twistedmatrix.com/bugs/issue1092). Upon further reflection I realised that this functionality is only really useful in the case of exes frozen with py2exe and I rewrote my patch to be completely external to the twisted core (code and test modules which i have attached to this mail). Would you consider perhaps inclusion of this in the twisted/scripts directory with a short note in a howto? Regards, Grant M P.S. this allows you to specify: twistd.exe -y <name> where <name> is the python module name without the .py

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[Twisted-Python] Dropping support for old cred
by Jp Calderone June 26, 2005

June 26, 2005

The modules: twisted.cred.authorizer twisted.cred.identity twisted.cred.service twisted.cred.perspective constitute "classic cred", which has been deprecated for some time now. "New cred" is available in the modules: twisted.cred.portal twisted.cred.checkers twisted.cred.credentials and offers a vastly superior API. The only remaining code in Twisted which uses "classic cred" is the old PB log in method, which is also deprecated (in favor of one based around new cred), and the old application code (twisted.internet.app) which is also deprecated in favor of twisted.application. It would be nice to remove this code from the next Twisted release. Does anyone have any applications still relying on them which they plan to use with Twisted 2.1? If so, what is preventing you from updating the code to the new, vastly improved APIs? Jp & Itamar

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