Mailman 3 November 2003 - Twisted

[Twisted-Python] plugin vs. dropin
by Phil Christensen 28 Nov '03

28 Nov '03

i was going through the docs, and i found the two classes in twisted/python/plugin.py, and i was wondering what the difference is between the two. i'd like to be able to make a sort of plugin that when the plugin package is in the path, it interacts in arbitrary ways with my main application. however, i don't think i'd want it to appear in mktap, as that doesn't really make sense in this situation.....or does it? -phil

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[Twisted-Python] Fwd: Seems like the remote stuff works almost TOO well!
by Glyph Lefkowitz 28 Nov '03

28 Nov '03

I am not sure if this was just the most creative unsolicited mail I ever received, or if it's a complaint from an unsuspecting user. I think the "werewolf" comment is from the "AUSPEX" capability of the POP3 server. Have crackers been using Twisted for some nefarious scheme? Begin forwarded message: > From: "D Triplett" <censored> > Date: November 27, 2003 2:55:46 PM EST > To: Glyph(a)twistedmatrix.com > Subject: Seems like the remote stuff works almost TOO well! > > Hi, > > Long story short, I wonder if you happen to play an online game named > "werewolf"? > > Better yet, could you tell me where I can get a floppy disk that would > wipe out any "twisted" remote network from my computer that I do not > know the password for, the network drive number, or anything? > > See, I don't know any of this because I didn't create or approve it. > But, hey, I bet whoever's taken 109 gigs of my hard drive (leaving me > with 11 gigs - sweet of them) were having a good time for a while... > > A few of the couple hundred txt docs led me to some stuff, which led > me to some more stuff, then a banana driver came along, and somehow, I > ended up reading about my cool remote server and compliments of > "twisted". > > I sure would appreciate any help you can give.

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[Twisted-Python] protocol factory interfaces?? (FTP)
by Jonathan Simms 26 Nov '03

26 Nov '03

Is it possible (or even useful) to have a protocol which expects the factory which builds it to have a specific interface? (as the protocol has a .factory attribute and therefore can access methods and attributes on it's factory) or must all twisted.protocols be able to work with internet.protocol.Factory() off-the-shelf?

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[Twisted-Python] Possible bug in from twisted.internet.app import Application ?
by jjanecek＠telusplanet.net 26 Nov '03

26 Nov '03

I am running freebsd with python 2.2.2 and twisted 1.10 the same code worked fine on another server which is identical except it is running twisted 1.07 anyways from twisted.internet.app import Application from pyRtpRelay import TRelayService print "Relay Going Up" application = Application('pyRtpRelay') RelayService=TRelayService(application) RelayService.Start() Inside my object TRelayService when I call application.ListenUDP(XXXXXXXX) it will not listen on the required UDP ports and returns None. As a temporary hack I then when from twisted.internet import reactor reactor.ListenUDP(XXXXXX) and it worked fine Thanx John

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[Twisted-Python] Woven application, objects not collected.
by Syver Enstad 25 Nov '03

25 Nov '03

I have a serious problem with some woven applications where deferreds and their results returned from wmfactory_ methods are not garbage collected. They just stack up in gc.garbage. The python documentation states that the contents of gc.garbage are objects that are part of a cycle can't be collected because they have a __del__ method. Any help on this issue would be really appreciated.

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[Twisted-Python] Twisted Signal Handler and wxPython
by Thorsten Henninger 25 Nov '03

25 Nov '03

Hi, I had a problem using wxPython together with twisted. The following code shows, that one has to start the reactor with the flag "installSignalHandlers=0", otherwise an SystemError occures. How does this affect my Twsited-Application? regards, Thorsten import traceback from wxPython.wx import * from twisted.internet import reactor class MyApp(wxApp): def OnInit(self): # Twisted Reactor Code print "reator start running" #reactor.startRunning(installSignalHandlers=0) #reactor.startRunning(installSignalHandlers=1) timerid = wxNewId() EVT_TIMER(self,timerid,self.OnTimer) self.timer=wxTimer(self,timerid) self.timer.Start(100,True) # End Twisted Code # Do whatever you need to do here return True def OnTimer(self,event): reactor.runUntilCurrent() reactor.doIteration(0) def main(): """ """ try: app = MyApp(0) print "CALLING MAIN LOOP" app.MainLoop() print "MAIN LOOP DONE" except SystemExit, err: print err except: exc_info = sys.exc_info() print "--------------------- CAUGHT EXCECPTION:", exc_info traceback.print_exc(file=sys.stdout) if __name__ == "__main__": try: main() finally: print "MAIN THREAD HAS EXITED" The following error occures on Windows 2000, Python 2.3.2 and wxPython 2.4.2: D:\Python23\lib\fcntl.py:7: DeprecationWarning: the FCNTL module is deprecated; please use fcntl DeprecationWarning) reator start running --------------------- CAUGHT EXCECPTION: (<class exceptions.SystemError at 0x007780F0>, <exceptions.SystemError instance at 0x011775D0>, <traceback object at 0x011775F8>) Traceback (most recent call last): File "E:\bbot\nextbot\gui\wxpython\application.py", line 41, in main app = MyApp(0) File "D:\Python23\lib\site-packages\wxPython\wx.py", line 1945, in __init__ _wxStart(self.OnInit) File "E:\bbot\nextbot\gui\wxpython\application.py", line 18, in OnInit reactor.startRunning(installSignalHandlers=1) File "D:\Python23\Lib\site-packages\twisted\internet\default.py", line 115, in startRunning self._handleSignals() File "D:\Python23\Lib\site-packages\twisted\internet\default.py", line 87, in _handleSignals signal.signal(signal.SIGINT, self.sigInt) SystemError: error return without exception set -- brainbot technologies AG boppstrasse . 64 . 55118 mainz . germany fon +49 6131 211639-1 . fax +49 6131 211639-2 http://brainbot.com/ mailto:henni@brainbot.com

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[Twisted-Python] Why would getUser()/getPassword() return ""?
by Stuart Hungerford 25 Nov '03

25 Nov '03

Hi all, Before I move onto learning about cred, guard and more sophisticated authentication schemes, I'm trying to get a simple example working with basic HTTP authentication. I have a resource subclass who's render() method checks the values of request.getUsername() and request.getPassword(): class request_create(twisted.web.resource.Resource): isLeaf = 1 addSlash = 0 def render(self, request): if (not request.getUser()) or (not request.getPassword()): request.setResponseCode(401, 'Authentication required') return twisted.web.error.ForbiddenResource().render(request) # do work and render HTML ... The problem is that no matter what I try getUser() and getPassword() both return the string "" and the web browser never prompts for a username/password. Is the above enough for the simplest possible HTTP authentication approach in Twisted web or should I be setting HTTP headers before the request.getUser()/request.getPassword() is performed? Any advice much appreciated, Cheers, Stu -- :: Stuart Hungerford (stuart.hungerford(a)anu.edu.au) :: ANU Internet Futures Group

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[Twisted-Python] trouble building Quotient
by rddda 25 Nov '03

25 Nov '03

trying to build Quotient-0.7.0 with Twisted-4.1.6 on OpenBSD with Berkeley DB (bsddb3-). made change to atop/store.py to use bsddb3: from bsddb3.db import * i get this error: ... obj = self._loadItemByPath(ctxstore, *path) File "/usr/local/lib/python2.3/site-packages/atop/store.py", line 386, in _loadItemByPath raise KeyError(path) KeyError: (0, 0) this is the code at that point: def _loadItemByPath(self, ctxstore, *path): """ Retrieve an item given a sequence of integers. """ stringKey = self._formatIDPath(path) print "str=%s"%stringKey; #debugging... stringValue = self.db.get(stringKey, txn=context.get('txn')) if stringValue is None: raise KeyError(path) ... so stringValue is 'None'. stringKey is shown by the print to be: id00000000000000000000 any hints <where to look>/<what to try>? --------------------------------- Do you Yahoo!? Free Pop-Up Blocker - Get it now

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[Twisted-Python] how to use the twisted logging facility?
by John Benson 25 Nov '03

25 Nov '03

I've looked at the log module documentation of twisted.python and more or less guess that you can redirect the print statement to a log, and somehow observe the stuff that is being logged in case you want to write it somewhere else too. I was able to redirect the Python print statement to a disk file, but am at a loss when it comes to properly configuring and installing an observer. I want to observe the logging stream and throw it out to a Tkinter text window. Thanks in advance for any advice.

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[Twisted-Python] Informal poll, and Resolution of earlier post Fw: help please: trouble installing twisted python on Windows 2000 Pro, but not Windows XP Pro
by John Benson 25 Nov '03

25 Nov '03

Hi, I'm answering my own post for the benefit if future newbies: I was having an awful time installing twisted on a W2K Professional machine. In desperation, I uninstalled all the Python things (Python 2.3 and Pythonwin), reinstalled Python 2.3, installed Twisted, and then Pythonwin and all the installations seemed to go OK. Plus I rebooted in between the installations because I didn't have a rubber chicken handy to wave over the computer. Not much of a technical note, but there it is. Informal poll: How many of you out there have ever indulged a taste for totemic decoration and/or fetishistic rituals in connection with debugging? ----- Original Message ----- From: John Benson To: twisted python Sent: Wednesday, November 12, 2003 7:57 PM Subject: help please: trouble installing twisted python on Windows 2000 Pro, but not Windows XP Pro Hi, I just installed twisted python on my Windows XP laptop which has Python 2.3.2. I went to install it on Windows 2000 Professional version 5.00.2195 Service Pack 4 running Python 2.3 and got the following dialog box diagnostic: "Setup: CreateFile failed; code 5. Access is denied." I've been able to install piles of stuff on this system before, so I figure I have the required administrative privileges. I logon to a Windows domain, and my ID is in the Administrators group of the domain. There is a separate Administrator logon local to the machine which I haven't used, and probably can't get the password for, since this is a managed PC within the domain. Here are my questions: 1) What does the "code 5" failure mean? 2) What am I doing wrong? 3) Can I just move the twisted site-package folders over from my XP system Python 2.3 folder to the corresponding Windows 2000 Pro folder? I'm mostly interested in just importing the twisted modules and prototyping; I can do without the icons and start menu entries.

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