Mailman 3 March 2004 - Twisted

[Twisted-Python] Lore Question: Creating a pdf book
by Schneider, Michael 14 Mar '04

14 Mar '04

I am using Lore to document a project that I am working on. I modeled my approach on the Twisted How To Sections. index.xhtml + 10 other xhtml pages. I have the html pages generated, and now I would like to generate a pdf book. I created a tex page for each xhtml using lore --output latex xxx.xhtml. My question is: how do I create a pdf book from the index.xhtml + x.xhtml or tex pages? Sorry for the stupid question, but I am new to lore and tex (too much time in MS word and html :-( Thanks, Mike ---------------------------------------------------------------- Michael Schneider Senior Software Engineering Consultant UGS PLM Solutions - an EDS Company "The Greatest Performance Improvement Is the transitioning from a non-working state to the working state"

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[Twisted-Python] ftpclient errors
by Richard Townsend 14 Mar '04

14 Mar '04

I have been experimenting with using ftpclient.py to access some FTP servers on the net, but have been getting errors with the list() and nlst() calls. I am using Twisted 1.2.0 + Python 2.3.3 + SuSE 8.2 Can anyone shed some light on this problem? Example ======= /usr/local/src/Twisted-1.2.0/doc/examples: python ftpclient.py -h ftp.python.org Success! Got response: --- 257 "/" is current directory. --- Unhandled error in Deferred: Failure: twisted.protocols.ftp.CommandFailed: ['500 L not understood.'] Unhandled error in Deferred: Failure: twisted.protocols.ftp.CommandFailed: ['500 I not understood.'] Unhandled error in Deferred: Failure: twisted.protocols.ftp.CommandFailed: ['500 S not understood.'] Unhandled error in Deferred: Failure: twisted.protocols.ftp.CommandFailed: ['500 T not understood.'] Unhandled error in Deferred: Failure: twisted.protocols.ftp.CommandFailed: ["500 Invalid command ' ': Try being more creative."] Unhandled error in Deferred: Failure: twisted.protocols.ftp.CommandFailed: ['500 . not understood.'] Success! Got response: --- 250 CWD command successful. --- Unhandled error in Deferred: Failure: twisted.protocols.ftp.CommandFailed: ['500 N not understood.'] Unhandled error in Deferred: Failure: twisted.protocols.ftp.CommandFailed: ['500 L not understood.'] Unhandled error in Deferred: Failure: twisted.protocols.ftp.CommandFailed: ['500 S not understood.'] Unhandled error in Deferred: Failure: twisted.protocols.ftp.CommandFailed: ['500 T not understood.'] Unhandled error in Deferred: Failure: twisted.protocols.ftp.CommandFailed: ["500 Invalid command ' ': Try being more creative."] Unhandled error in Deferred: Failure: twisted.protocols.ftp.CommandFailed: ['500 . not understood.']

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RE: [Twisted-Python] win32 buildbot
by Schneider, Michael 14 Mar '04

14 Mar '04

Next week, I was planning on setting up buildbot on our windows systems: Couple of quick questions: - did you use the buildbot code out of CVS, or have you made mods? - If you made mods, can you check them into CVS? - Did you add a cmd.exe /c for execution of shell command? - Any Tips? Thanks, Mike ---------------------------------------------------------------- Michael Schneider Senior Software Engineering Consultant UGS PLM Solutions - an EDS Company "The Greatest Performance Improvement Is the transitioning from a non-working state to the working state" > -----Original Message----- > From: twisted-python-admin(a)twistedmatrix.com > [mailto:twisted-python-admin@twistedmatrix.com]On Behalf Of Itamar > Shtull-Trauring > Sent: Saturday, March 13, 2004 11:34 AM > To: twisted-python(a)twistedmatrix.com > Subject: [Twisted-Python] win32 buildbot > > > Thanks to the efforts of Cory and Norfolk, we now have a working win32 > buildbot. So, it's time to get all tests passing. Everyone > please take a > moment to look at what's failing and see if it's code you're > responsible > for. Fixes to win32event reactor or a finished IOCP reactor so we can > abandon it are welcome ;) > > -- > Itamar Shtull-Trauring http://itamarst.org > Looking for a job: http://itamarst.org/resume.html > > > _______________________________________________ > Twisted-Python mailing list > Twisted-Python(a)twistedmatrix.com > http://twistedmatrix.com/cgi-bin/mailman/listinfo/twisted-python >

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[Twisted-Python] ESMTPClient
by Koen Van Herck 11 Mar '04

11 Mar '04

Does anyone have an example of using twisted.protocols.smtp.ESMTPClient ? I.e., I would like to write a client for sending mail to an SMTP server which requires authentication. Thanks, Koen Van Herck.

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[Twisted-Python] ssh & sftp clients
by Earl Eiland 09 Mar '04

09 Mar '04

I don't see in the documentation how to create ssh/sftp clients.

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Re: [Twisted-Python] Lock class using Deferreds
by exarkun＠divmod.com 07 Mar '04

07 Mar '04

On Fri, 05 Mar 2004 18:34:44 -0500, Christopher Armstrong <radix(a)twistedmatrix.com> wrote: >Andrew Bennetts wrote: > > On Fri, Mar 05, 2004 at 11:19:01AM -0500, Itamar Shtull-Trauring wrote: > > > >>class Lock: > >> """A lock for event driven systems.""" > > > > > > I have very very similiar looking code on my harddisk... what inspired you > > to write this? :) > > I have something vaguely similar too; a class that handled a 'pipeline' > (?) of Deferreds and didn't allow more than N at a time. My purpose for > it was doing several thousand DNS queries and I only wanted at most N > outstanding requests at a time, so I wouldn't overload the servers. Ok, > so it's not that similar, but it's something that would probably go in > the same module ;-) Actually, it is extremely similar. It's called a semaphore :) This, along with a condition class would probably all make for a good module. I was thinking twisted.python.defertools, if only defer wasn't part of twisted.internet :( Jp

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Re: [Twisted-Python] Twisted + tlslite
by exarkun＠divmod.com 07 Mar '04

07 Mar '04

On Fri, 05 Mar 2004 22:33:48 -0800, Trevor Perrin <trevp(a)trevp.net> wrote: > > > Hi Twisted folks, > > I recently wrote an SSL library in python [1] and got it working with > asyncore. I'd like to make it useable with Twisted too. The library has a > few nice features, so it wouldn't be totally redundant with Twisted's > current SSL support: > - it can run in pure python (slowly) > - it supports some nonstandard authentication methods (SRP, cryptoIDs, > and shared-keys) > > As a proof-of-concept I did some blunt-object surgery, and got Twisted's > pre-configured web server using it for HTTPS. > > To do a real integration, though, I think I'd need help: I'm a Twisted > newbie, and Twisted looks tightly-coupled with PyOpenSSL. At least, > there's no easy way to "plug in" that I saw. In the mailing list there was > talk about Jython/Java SSL [2]. That would have the same issues, I think, > so maybe they could be looked at together. > > Anyways, if anyone's interested in discussing the details, let me know! I'm definitely interested in getting Twisted doing SSL with a pure-python SSL library. I have only had time to look at TLSLite briefly, and probably won't have any time to attempt the integration for a little while (several weeks at the earliest, I imagine). I might be able to offer some pointers though. One tip: don't try to integrate with the existing SSL code. The implementation is very much a result of the API limitations of PyOpenSSL. Preferably, a new implementation will provide SSL support as a protocol instead of a transport. For examples of how this can be done, see twisted.protocols.policies. Jp

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[Twisted-Python] Twisted + tlslite
by Trevor Perrin 06 Mar '04

06 Mar '04

Hi Twisted folks, I recently wrote an SSL library in python [1] and got it working with asyncore. I'd like to make it useable with Twisted too. The library has a few nice features, so it wouldn't be totally redundant with Twisted's current SSL support: - it can run in pure python (slowly) - it supports some nonstandard authentication methods (SRP, cryptoIDs, and shared-keys) As a proof-of-concept I did some blunt-object surgery, and got Twisted's pre-configured web server using it for HTTPS. To do a real integration, though, I think I'd need help: I'm a Twisted newbie, and Twisted looks tightly-coupled with PyOpenSSL. At least, there's no easy way to "plug in" that I saw. In the mailing list there was talk about Jython/Java SSL [2]. That would have the same issues, I think, so maybe they could be looked at together. Anyways, if anyone's interested in discussing the details, let me know! Thanks, Trevor [1] http://trevp.net/tlslite/ [2] http://www.twistedmatrix.com/pipermail/twisted-python/2004-January/006892.h…

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[Twisted-Python] Lock class using Deferreds
by Itamar Shtull-Trauring 06 Mar '04

06 Mar '04

class Lock: """A lock for event driven systems.""" def __init__(self): self.waiting = [] self.locked = 0 def acquire(self): """Attempt to acquire the lock. @return Deferred which returns on lock acquisition. """ d = defer.Deferred() if self.locked: self.waiting.append(d) else: self.locked = 1 d.callback(self) return d def release(self): """Release the lock. Should be called by whoever did the acquire() when the shared resource is free. """ assert self.locked self.locked = 0 if self.waiting: # someone is waiting to acquire lock self.locked = 1 d = self.waiting.pop(0) d.callback(self) def _releaseAndReturn(self, r): self.release() return r def run(self, f, *args, **kwargs): """Acquire lock, run function, release lock. @return Deferred of function result. """ d = self.acquire() d.addCallback(lambda r: defer.maybeDeferred(f, *args, **kwargs).addBoth(self._releaseAndReturn)) return d -- Itamar Shtull-Trauring http://itamarst.org Looking for a job: http://itamarst.org/resume.html

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[Twisted-Python] Bug in twistw.py
by Steve Goldman 05 Mar '04

05 Mar '04

Sorry for posting here, but I couldn't get the bug tracker to register me. The twistw.py file provided by the windows installers for python 2.2 and python 2.3 doesn't have any main function. It needs the following lines added to the end of the script: if __name__ == "__main__": run() Thanks.

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