Mailman 3 September 2001 - Twisted

[Twisted-Python] connectionLost patch
by Chris Armstrong 27 Sep '01

27 Sep '01

I patched connectionLost in server.request to call 'connectionLost' on resources if they have it. This is not a very good patch, and a bad solution, I think, but redoz wanted it for some functionality he needed in a streaming chat web thingy. Any ideas on a better solution for disconnect notification? should this just stay a third party feature?

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[Twisted-Python] System Plugings
by Moshe Zadka 27 Sep '01

27 Sep '01

I object to placing plugins/ as a sibling for twisted/ - these should be in something like /usr/share/twisted/plugins/. Advice for a way to have the Debian installation append this directory to the Python page in addDir will be met with thanks. -- The Official Moshe Zadka FAQ: http://moshez.geek The Official Moshe Zadka FAQ For Dummies: http://moshez.org Read the FAQ

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[Twisted-Python] Anon CVS
by Itamar Shtull-Trauring 27 Sep '01

27 Sep '01

A few days ago glyph gave in and said he'd set up anonymous CVS and that viewcvs could be setup. So bug him till he does :)

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[Twisted-Python] This might be interesting
by Itamar Shtull-Trauring 26 Sep '01

26 Sep '01

<http://web.lfw.org/python/delegate.py>

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[Twisted-Python] Re: [Twisted-commits] CVS: Twisted/twisted/test test_protocols.py,1.6,1.7
by Moshe Zadka 26 Sep '01

26 Sep '01

On Tue, 25 Sep 2001, Itamar Shtull-Trauring <itamarst(a)twistedmatrix.com> wrote: > + assert r.brokenPeer, "connection wasn't closed on illegal netstring %s" % repr(s) Itamar, and everybody: STOP DOING THAT!!!!!!!!!!!!!!!!!!!!!!!! Don't use "assert" in tests, since they don't operate under python -O. Someday, we'll want to test it working ok with -O. (say, if there is some less-then-trivial code undef "if __debug__".) -- The Official Moshe Zadka FAQ: http://moshez.geek The Official Moshe Zadka FAQ For Dummies: http://moshez.org Read the FAQ

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[Twisted-Python] Blocking
by Moshe Zadka 26 Sep '01

26 Sep '01

Hi! I whipped up the following to help regular client applications use pb even if they are written in a linear manner. class _Blocker: callbackName = 'callback' errbackName = 'errback' def __init__(self, method, args, kw): self.method = method self.args = args self.kw = kw def callback(self, value): self.state = 1 self.value = value main.shutDown() def errback(self, value=None): self.state = 0 self.value = value main.shutDown() def block(self): kw = self.kw.copy() kw[self.callbackName] = self.callback kw[self.errbackName] = self.errback apply(self.method, args, kw) main.run() if self.state: return self.value raise BlockingError, self.value def block(method, *args, **kw): return _Blocker(method, args, kw).block() Any feedback?

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[Twisted-Python] Seperate Out pb.Broker.expressionReceived
by Moshe Zadka 26 Sep '01

26 Sep '01

Can pb.Broker inherit from pb.Protocol which will inherit from banana.Banana? I want to use just the proto_ stuff without out all the authorizer stuff in the way. Currently, I'll just copy. -- The Official Moshe Zadka FAQ: http://moshez.geek The Official Moshe Zadka FAQ For Dummies: http://moshez.org Read the FAQ

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[Twisted-Python] Protocol handler are open to DoS attacks
by Itamar Shtull-Trauring 25 Sep '01

25 Sep '01

In general, I've been noticing that the behaviour of protocol given illegal inputs is problematic - no length limits, and garbage is raised as part of exceptions. Problem 1 leads to giant memory usage - a line receiver can receive MBs of MBs of data it will happily buffer until it gets a line break. The other problem leads to mucho garbage and exceptions in the log. See protocols.basic.SafeNetstringReceiver to see how I solved it for netstrings. You can test both things in unix - run a webserver on port 8080, then: # send infinite data $ yes | netcat localhost 8080 # send garbage $ cat /dev/urandom | netcat localhost 8080

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[Twisted-Python] Naming of Names
by Moshe Zadka 25 Sep '01

25 Sep '01

Hi! I've written the following cool module to help with unit testing and other beasts. I really want to check it in, but I want to make sure I don't offend anyone's sensibilities. For me, this name is both natural and descriptive, but... (it already found two bugs in the SMTP module, by the way) >--------------------------------------< class MasturbatoryRelay: buffer = '' shouldLose = 0 log = '' def __init__(self, target): self.target = target def write(self, data): print "writing", `data` self.buffer = self.buffer + data def clearBuffer(self): try: self.target.dataReceived(self.buffer) finally: self.buffer = '' if self.shouldLose: self.target.connectionLost() def loseConnection(self): self.shouldLose = 1 def masturbate(server, client): serverToClient = MasturbatoryRelay(client) clientToServer = MasturbatoryRelay(server) server.makeConnection(serverToClient) client.makeConnection(clientToServer) while 1: serverToClient.clearBuffer() clientToServer.clearBuffer() if serverToClient.shouldLose or clientToServer.shouldLose: break return clientToServer.log >--------------------------------------< -- The Official Moshe Zadka FAQ: http://moshez.geek The Official Moshe Zadka FAQ For Dummies: http://moshez.org Read the FAQ

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[Twisted-Python] twisted.mail.pb
by Moshe Zadka 24 Sep '01

24 Sep '01

This pre-alpha module is where I'm trying to develop something that will replace IMAP over pb -- The Official Moshe Zadka FAQ: http://moshez.geek The Official Moshe Zadka FAQ For Dummies: http://moshez.org Read the FAQ

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