Mailman 3 June 2008 - 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. ______ __ __ _____ _ _ | ____ | \_/ |_____] |_____| |… [View More]

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[Twisted-Python] regarding xml elements
by Raj kumar Oct. 2, 2013

Oct. 2, 2013

Hi, I have an xml file in my application, I have created an element using Example goes like this......... document.createElement("abc") and i appeneded it by using append() method. But how i can reflect this change to my xml file? and one more thing is i want to create element with some other parameters.... like............. <abc m=" " n=" "> </abc> and i have m and n values as strings with me. can anybody help me to create this element and write it to the existing xml … [View More]

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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 … [View More]

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[Twisted-Python] SQLAlchemy and Twisted
by alex clemesha Feb. 13, 2009

Feb. 13, 2009

Hi, I didn't want to hijack the 'Twisted Presentation Materials..' thread, so I started this one ... First off, in the other thread, Glenn, you mentioned Storm. I have heard of Storm, but never got any deeper that noticing that it is still a work in progress (maybe things have settled down ?) If anyone has anything to say on how it might be a good choice with Twisted, please feel free to enlighten us! But, I hoping to solve some immediate problems with Twisted and SQLAlchemy, so ... >… [View More]

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[Twisted-Python] Twisted Hosting and Twisted in the Cloud
by Duncan McGreggor July 14, 2008

July 14, 2008

Hey everyone, Divmod's been talking to various hosting companies about potential Twisted deals (and maybe even support). I wanted to get a gauge of people's level of interest in the services we've been discussing. We're currently looking at the following options: * Dedicated hosts, with Twisted libs pre-installed on them * Virtual hosts/"slices" with Twisted libs pre-installed on them * Clouds that support uploading and running Twisted apps * Potential support contracts where Divmod … [View More]

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[Twisted-Python] AMP compliance tests
by Jonathan Lange July 10, 2008

July 10, 2008

Hello all, Where can I find a set of automated tests that check that a particular AMP implementation is complete? I seem to recall someone on #twisted mentioning that they were working on such a suite. thanks, jml

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[Twisted-Python] Bloody Twisted VFS
by Andy Gayton July 10, 2008

July 10, 2008

Hey guys, I'm really keen to get twisted.vfs to a stable point that is acceptably releasable. There's 6 tickets to knock off to get it to this state: This ticket will give an easily runnable vfs server, which'll be useful for experimenting with vfs as it is worked on: * http://twistedmatrix.com/trac/ticket/2821 This ticket ports the backend vfs interface to be firstly async, and also, not quite so lame: * http://twistedmatrix.com/trac/ticket/2815 Then we can port the 3 currently … [View More]

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[Twisted-Python] [SIP]
by Rémi BUISSON July 7, 2008

July 7, 2008

Hi everyone, I didn't succeed in using twisted.protocols.sip ? Do you have a simple example for me ? It will be very nice ... Thanks in advance !

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Re: [Twisted-Python] Returning a DeferredList?
by Terry Jones July 1, 2008

July 1, 2008

>>>>> "Nathan" == Nathan <nathan.stocks(a)gmail.com> writes: Nathan> I regularly use the return values of deferreds to simulate Nathan> synchronous behaviour like this: [snip] Nathan> So now I'm trying to do the same thing with DeferredList's, but Nathan> apparently the semantics aren't the same. Here's some actual Nathan> runnable sample code trying to use the DeferredList: Hi Nathan You're not using deferreds properly. In the simple/typical case, … [View More]

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Re: [Twisted-Python] Returning a DeferredList?
by Terry Jones June 30, 2008

June 30, 2008

>>>>> "Nathan" == Nathan <nathan.stocks(a)gmail.com> writes: Nathan> On Mon, Jun 30, 2008 at 4:20 PM, Terry Jones <terry(a)jon.es> wrote: >> You're not using deferreds properly. In the simple/typical case, when you >> call a function that returns a deferred, you will want to add (at least) a Nathan> I don't think that's true. Jean-Paul was the one who told me to do Nathan> it that way in the first place: Nathan> http://twistedmatrix.com/… [View More]

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[Twisted-Python] Returning a DeferredList?
by Nathan June 30, 2008

June 30, 2008

I regularly use the return values of deferreds to simulate synchronous behaviour like this: def handle_db_result(result): if ({some logic stuff}): return True else: return False def check_db(): d = {some db query that returns a deferred} d.addCallback(handle_db_result) return d def main_func(): if check_db(): # This eventually returns True or False # Do some stuff else: # Do some different stuff So now I'm trying to do the same thing with … [View More]

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[Twisted-Python] Issues with creating switchboards with twisted.words.protocols.msn
by Hermann Kaser June 30, 2008

June 30, 2008

Hello all, I'm trying to write an MSN client but I've run into a problem: for some reason when I create a Switchboard and try to invite someone it sends the join command and the invitation command all together and the MSN server doesn't answer any of them. Here's the relevant bits of the code I have: class Switchboard(msn.SwitchboardClient): def connectionMade(self): self.key = self.factory.key self.sessionID = self.factory.sessionID self.userHandle = self.factory.… [View More]userHandle self.invite = self.factory.invite msn.SwitchboardClient.connectionMade(self) d = self.inviteUser(self.invite) d.addCallback(self.Invited) def Invited(self, *args): print 'Running reply callback' And this is the ngrep stream after the XFR request # send transfer request T 192.168.1.36:39816 -> 207.46.110.133:1863 [AP] CHG 6 NLN..XFR 7 SB.. # get transfer response T 207.46.110.133:1863 -> 192.168.1.36:39816 [AP] XFR 7 SB 64.4.37.58:1863 CKI 712606054.15830117.2511186.. T 207.46.110.133:1863 -> 192.168.1.36:39816 [AP] CHG 6 NLN 0.. T 207.46.110.133:1863 -> 192.168.1.36:39816 [AP] ILN 6 NLN [redacted](a)hotmail.com [redacted screenname] 1073741856.. T 192.168.1.36:44867 -> 64.4.37.58:1863 [AP] USR 1 [my email] 712606054.15830117.2511186..CAL 2 [email of who i want to invite].. If I try to do the same process with pidgin for example, the stream looks exactly the same except the USR and CAL command are on separate packets, and the server responds to the USR command before the client sends the CAL command. Can anyone help me out figuring this out? I know you can send more than one command per packet, as seen in the first packet of the ngrep stream I posted, so I don't see why it wouldn't work to send the USR and CAL command together, but I suspect that not all commands may be stuck together. I stuck a time.sleep(20) between the calling msn.SwitchboardClient.connectionMade(self) and self.inviteUser(self.invite) to see if it was a timing issue but what happens is that the USR command gets buffered, and only when the script tries to send the CAL command does the socket actually write it out. Any help on this would be greatly appreciated, I've been digging around the documentation and the code but I can't seem to figure out why it's buffering the USR command and I don't know enough about the MSN protocol to know which commands need a unique packet and which ones can go with others. Regards, Hermann Käser http://theragingche.com/ http://semicir.cl/user/hermzz [View Less]

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[Twisted-Python] Implementing startup sanity-checks for twistd services.
by Tim Allen June 30, 2008

June 30, 2008

The system I'm working on at the moment is talking to MySQL, and in order to get reasonable behaviour, I need to make sure the "SQL_MODE" variable is set on both the database connection, and on the stored procedures I'll be calling. If this is not set up correctly, I expect to be plagued with silent data corruption issues. I can force the SQL_MODE per-connection when I connect to the database, but I need to double-check the procedures whenever I start up. Ideally, my system would follow a … [View More]

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[Twisted-Python] Weekly Bug Summary
by exarkun＠twistedmatrix.com June 29, 2008

June 29, 2008

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Re: [Twisted-Python] Re-working a synchronous iterator to use Twisted
by Terry Jones June 28, 2008

June 28, 2008

Following the massive interest in my earlier postings on this thread, I'm following up to myself again :-) Here's what I was trying to do: > In case it wasn't clear before, you're pulling "results" (e.g., from a > search engine) in off the web. Each results pages comes with an indicator > to tell you whether there are more results. I wanted to write a function > (see processResults below) that, when called, would call the process > function below on each result, all done … [View More]asynchronously. I posted some cumbersome code to roughly do that. I've since been thinking about this on and off, with help from Esteve Fernandez, and we've made the code quite a bit simpler. I think there's a general pattern here that's worth thinking about. Roughly: the above need is like the Twisted analogy of using iterators in regular synchronous programming. By that I mean that the normal pattern of Twisted usage is: a single event is anticipated (by the programmer), it occurs once, and its result is passed down a call/errback chain. That's roughly like a single function call in synchronous code. But if you are expecting a sequence of external events to occur and you want to asynchronously pass their results in turn down a call/errback chain. The need to do this in synchronous code can be filled with a simple iterator. But doing this asynchronously (when the fetch of the next batch of results might take a while) doesn't seem to fit easily into the single-shot asynchronous Twisted paradigm. I thought about modifying defer.py to allow a callback chain to be called multiple times (and to have the "normal" single-shot chain be a special case). But that was clearly going to get messy. BTW, I find defer.py is really elegant. After more thinking about how to make my previously posted code simpler, Esteve and I came up with what you'll find at http://python.pastebin.com/f7df56752 (code) and http://python.pastebin.com/f1e582264 (simple tests) The idea is that you provide a result fetcher function to the TwIterator class. This function will be called repeatedly, as needed, to get more results. It returns a deferred whose callback it should call with a list of next results (which may be empty), a bool to indicate whether to re-call the function, and a dict of args to pass to it next time. The TwIterator class provides you with a list() method that you can use almost like an iterator: @inlineCallbacks def printer(results): for x in results: print (yield x) fetcher.list().addCallback(printer) This is in some sense like a general asynchronous iterator for Twisted. The printer function receives an iterator, each element of which is a deferred, and when that deferred fires it produces the next result. The test code gives 4 simple example result-fetching functions, and calls them all asynchronously. If you run it you'll see the results coming out in a somewhat random order. I wont go into more detail, given that no-one responded to the first two postings. It's still possible that I'm trying to solve a problem that can already be done by some standard Twisted module. I don't know enough about Twisted to know for sure. Terry [View Less]

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[Twisted-Python] LoopingCall question
by Mike Preshman June 28, 2008

June 28, 2008

Hello, I am trying to run three deferred LoopingCall chains in parallel. Here is my code below. I am trying to figure out what is the correct way of exiting the polling after I meet some condition that the polling satisfies. Right now I am throwing an exception which is being caught by an errback. I wait for all three deferred chains to complete via a DeferredList with (defer.gatherResults) and then I add a callback to that in order to stop the reactor. class PollingException(twisted.python.… [View More]

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[Twisted-Python] twisted threading with a long running process
by Doug Farrell June 27, 2008

June 27, 2008

Hi all, I've built a Twisted server that handles Python logging messages sent from the logging.handlers.SocketHandler system. Right now my protocol implementation handles logging the received logRecord to a file and entering it into an in memory model for statistical purposes. I'm thinking of off-loading this activity to a separate thread by having the protocol just send the logRecord it receives into queue that is serviced by a separate thread. My question is whether using the twisted.… [View More]

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[Twisted-Python] FW: reject all open connections
by Irae Hueck Costa June 26, 2008

June 26, 2008

From: iraehc(a)hotmail.com To: twisted-python(a)twistedmatrix.com Subject: reject all open connections Date: Sat, 21 Jun 2008 22:26:37 +0200 hi all! i am sorry, its the first time i am asking something twice but its important for me to get a question. thank you!: i just want to clean my reactor - all readers and writer should looseConnection() but how can i do this? reactor.removeAll() dont do it. the best solutions i found was a horrible workaround: a thread is tarted, which … [View More]

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[Twisted-Python] Example for a new protocol over TCP
by Matthieu Brucher June 25, 2008

June 25, 2008

Hi, I'm new to twisted and I'm trying to implement a set of protocols (already available in Java, JXSE). I lamost know how I will set up the different services that will communicate through the reactor, but I'm starting from the beginning, so here is my real question. How can I set up a factory (using a TCP protocol) so that when I want to send a message to someone, it connects though TCP to the other computer, they exchange a welcome message, and only then the message is sent though the TCP … [View More]

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[Twisted-Python] Question about using a deferred
by Doug Farrell June 25, 2008

June 25, 2008

Hi all, I've written a twisted server that handles logging messags from the logging.handlers.SocketHandler class. The protocol I've written handles the messages and then calls its own instance of a logger to log the message to. I'm wondering if the file I/O the logger is doing is something I hand off to a deferred, or is it quick enough to not to worry about? Thanks! Doug

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[Twisted-Python] Sane way to get the exit code from reactor.spawnProcess(SomeProtocol, ...)
by Nathan June 25, 2008

June 25, 2008

Is there a more sane way to get the exit code from a ProcessProtocol than by parsing it out of reason.value in ProcessProtocol.processEnded()? I can't seem to find the error code by itself anywhere. (see example code at bottom) If I replace "print reason.value" with "print dir(reason)" below, then I get the following output for both successful and unsuccessful spawns: ['__doc__', '__getstate__', '__init__', '__module__', '__repr__', '__str__', '_findFailure', '_yieldOpcode', 'check', '… [View More]

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[Twisted-Python] IPv6 support in Python Twisted
by Cedric Delfosse June 24, 2008

June 24, 2008

Hello, I'm wondering what is the current status of IPv6 support in the Twisted framework. I only found this ipv6.py file there: http://twistedmatrix.com/trac/browser/sandbox/exarkun/ipv6.py Is IPv6 support scheduled in Twisted roadmap ? Best regards, -- Cedric Delfosse Mandriva / Linbox 152, rue de Grigy - Technopole Metz 57070 METZ - FRANCE tel: +33 (0)3 87 50 87 90 http://mandriva.com

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[Twisted-Python] How to set client timeout with reactor.listenTCP?
by uupandemo June 23, 2008

June 23, 2008

When a client to the server socket, server can't close the connection while the idle time exceed the timeout. How to solve it?

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Re: [Twisted-Python] Urgently Seeking.......
by anurag uniyal June 23, 2008

June 23, 2008

I am extremely sorry, please ignore this email. rgds Anurag ----- Original Message ---- From: anurag uniyal <anuraguniyal(a)yahoo.com> To: Twisted general discussion <twisted-python(a)twistedmatrix.com> Sent: Monday, 23 June, 2008 6:21:37 PM Subject: Re: [Twisted-Python] Urgently Seeking....... Hi, I have about 8 years of exp.in python and have exp. with both twisted and django and I am currently located in India. I would like to know more about this oppurtunity e.… [View More]

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Re: [Twisted-Python] Urgently Seeking.......
by anurag uniyal June 23, 2008

June 23, 2008

Hi, I have about 8 years of exp.in python and have exp. with both twisted and django and I am currently located in India. I would like to know more about this oppurtunity e.g what type of project it is, how technically involved. and is tellecommuting is an option here? thanks and regards Anurag ----- Original Message ---- From: Sean Burling <Sean.Burling(a)v-hr.com> To: twisted-python(a)twistedmatrix.com Sent: Monday, 23 June, 2008 4:23:59 PM Subject: [Twisted-Python] Urgently Seeking..… [View More]

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