Mailman 3 January 2006 - 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] 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] 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 … [View More]

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[Twisted-Python] Service dependencies
by Matt Goodall July 10, 2006

July 10, 2006

Hi, I have a couple of services. The second is dependent on the first being fully initialised before the second gets set up. I thought that the order of Service startup was typically handled by organising services in a hierarchy, and that the startup of the hierarchy understood deferreds. I was wrong - service.Application is a MultiService and only understands deferreds in stopService. There's a DependentMultiService class in twisted.internet.app but that entire module has been deprecated. … [View More]

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[Twisted-Python] Status of wxPython support in Twisted 2.1: use wxreactor
by Itamar Shtull-Trauring July 1, 2006

July 1, 2006

wxreactor in Twisted 2.1 uses threadedselectreactor. This means that wx apps ought to use wxreactor, not TSR directly; there are some issues with vanilla TSR wx integration that are also present in wxreactor, but will be fixed in future versions of wxreactor. What's broken (there may be more): 1. reactor shutdown events aren't handled correctly (e.g. Deferred returned from during-shutdown event). 2. Signal handling for e.g. Ctrl-C is caught by wx, not twisted. In order to get these fixed I … [View More]

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[Twisted-Python] How to do cleanup to server on sigint
by Rob Mason Jan. 31, 2006

Jan. 31, 2006

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[Twisted-Python] Deferred ownership and the Protocols
by Andy Leszczynski Jan. 31, 2006

Jan. 31, 2006

Hi, I am in the process of designing the custom Protocol and will use Deferred-s in order to pass the asynchronous results. I try to learn from the current Twisted code base. For instance there are two modules smtp.py and web/client.py: def getPage(url, contextFactory=None, *args, **kwargs): [] factory = HTTPClientFactory(url, *args, **kwargs) [] reactor.connectTCP(host, port, factory) [] return factory.deferred def sendEmail(smtphost, fromEmail, toEmail, content, … [View More]

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[Twisted-Python] Perspective Broker example broken
by Peter Stradinger Jan. 31, 2006

Jan. 31, 2006

Hi, I'm trying to get the Authentication with Perspective Broker examples to work, and I'm getting a Failure: http://twistedmatrix.com/projects/core/documentation/howto/listings/pb/chat… http://twistedmatrix.com/projects/core/documentation/howto/listings/pb/chat… The server returns this error when you run the client: Unhandled error in Deferred: Traceback (most recent call last): Failure: twisted.spread.pb.PBConnectionLost: [Failure instance: Traceback (failure with no frames): twisted.… [View More]

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[Twisted-Python] How to do cleanup to server on sigint
by Rob Mason Jan. 31, 2006

Jan. 31, 2006

Hi , I am using twisted to write a test client to interface with a server running a bespoke protocol. The server expects interactions from the client something like: attach sendMessage sendMessage . . . unattach If the server does not receive a specific unattach from the client , it will maintain a resource open for the client even though there is no connection. Eventually the server will refuse additional connections (once it's number of '… [View More]

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[Twisted-Python] Re: parallel callbacks? Or inserting into the callback chain?
by Lenny G Arbage Jan. 28, 2006

Jan. 28, 2006

Okay, I think I figured it out. The idea is to create new Deferreds for each call, but keep the 'matching' ones in a list. Then, when the first fires, use it to fire callbacks for each of those: from twisted.internet import reactor, defer pending = {} waiting = {} def getDummyData(queryName, x): def serviceWaiting(res, x): #print "in saveResult" if waiting.has_key(x): #print "waiting has_key" for i in waiting[x]: #print "calling … [View More]

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[Twisted-Python] is it possible to have a (single) twisted client that
by john peter Jan. 27, 2006

Jan. 27, 2006

makes more than one (say, three) connections to the same server instance? i was thinking of something like this: an 'ADD' connection that sends new data items to the server for saving, an 'UPDATE' connection that sends data update requests, and a 'DELETE' connection that sends data deletion requests. All three connections share DATA ID information, but should otherwise have "independent" existence so that they can be configured to have different "behavioral" attributes; that is, the … [View More]

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[Twisted-Python] parallel callbacks? Or inserting into the callback chain?
by Lenny G Arbage Jan. 27, 2006

Jan. 27, 2006

Is there any way to make a deferred call its callbacks 'in parallel,' or to insert a callback into the callback chain at a point further up than the end? Or maybe there is some other pattern for doing what I need to accomplish, which is getting the result from a deferred before it gets modified by the return of other callbacks that have already been added, but before it is fired. Here is an example that illustrates why I need something like this. It is almost identical to the first example … [View More]in the deferred howto (http://twistedmatrix.com/projects/core/documentation/howto/defer.html): from twisted.internet import reactor, defer pending = {} def getDummyData(queryName, x): if pending.has_key(x): print "%s piggybacking on pending big expensive query" % queryName return pending[x] d = defer.Deferred() # simulate a delayed result by asking the reactor to fire the # Deferred in 2 seconds time with the result x*3 print "%s about to do some big expensive query" % queryName reactor.callLater(2, d.callback, x*3) pending[x] = d return d def printData(d, queryName): """ Data handling function to be added as a callback: handles the data by printing the result """ print "%s received: %s" % (queryName, d) # simulate two calls (originating from some client[s]) at roughly the same # time for the same query. d = getDummyData('query1',3) d.addCallback(printData,'query1') d = getDummyData('query2',3) d.addCallback(printData,'query2') # manually set up the end of the process by asking the reactor to # stop itself in 13 seconds time reactor.callLater(4, reactor.stop) # start up the Twisted reactor (event loop handler) manually reactor.run() The output, as you might expect, looks like this: query1 about to do some big expensive query thing query2 piggybacking on pending big expensive query thing query1 received: 9 query2 received: None I'd like the output for query2 to match that of query1. Of course, this could be accomplished by adding a 'return d' to the end of printData(), but this is not feasible in this case, because the caller of getDummyData() might have added his own callbacks (in addition to printData()) that do whatever it is that he desires, including changing the return result or not propogating it up the chain. In the scenario I am designing for, getDummyData() will be invoked by client(s), and we don't want to open up new "big expensive" queries to the source if one is already pending that matches. Thus, I'd love for getDummyData() to return a deferred that piggybacks on an existing query, if one that matches is still pending. Can this be done? Is there a way to modify the above [simple] example so that it performs this behavior? Is there some other way to approach the problem that I'm missing? Thanks, Lenny G. __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com [View Less]

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[Twisted-Python] Twisted n00b question
by Michal Migurski Jan. 27, 2006

Jan. 27, 2006

Hello - I'm completely new to Twisted and moderately (~1 year) experienced with Python, and I'm here because I need some help understanding how to set up a web proxy. My goal: an HTTP proxy living on my local machine (OS X) that will transparently serve up web pages to myself, while allowing me to snoop & log connections I make to remote servers. I want the equivalent of an Attention Trust recorder (http:// www.attentiontrust.org/services) without having to use Firefox. My … [View More]

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[Twisted-Python] Re: [Twisted-web] Re: Actual Useful Post
by Andrew Bennetts Jan. 27, 2006

Jan. 27, 2006

[moving this to twisted-python, where it clearly belongs] Michael Hudson wrote: [...] > > Well, I've had a quick pop at the interesting bit of this task while > travelling over the weekend: using the compiler module I can extract > the docstrings and class hierachy of all the stuff in the Twisted > source. It's a touch fragile, but seems to work for all the > constructions used by Twisted. > > One issue is classes that are defined in one file but generally used > … [View More]

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[Twisted-Python] Performance footprint of the twisted.internet.task
by Andy Leszczynski Jan. 26, 2006

Jan. 26, 2006

Hi, I have three programs which do nothing besides a certain function/code line is executed approximately 100 times a second. Not big deal it would seem. 1: from twisted.internet import task from twisted.internet import reactor def runEverySecond(): pass l=task.LoopingCall(runEverySecond) l.start(0.01) reactor.run() 2: import time while 1: #f() time.sleep(0.01) 3: from twisted.internet import reactor def f(p): reactor.callLater(0.01,f,0) f(0) reactor.run() * * * I … [View More]

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[Twisted-Python] reacting for bsddb changes
by Andy Leszczynski Jan. 26, 2006

Jan. 26, 2006

Hi, Short question. Is there any way to have an object associates somehow with the reactor's main loop, so the application can react for the changes in the databases. I just want to avoid to have a timer which would poll the Berkley db table periodically. The application runs on Linux and M$ Windex. Thanks, AndyL

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[Twisted-Python] cleaning up unit test failures
by glyph＠divmod.com Jan. 26, 2006

Jan. 26, 2006

I just wanted to let everyone know that the recent buildbot failures on win32 (the process-related ones) are about half my fault. At the time that I wrote the offending code, I couldn't get a full test run for the win32 reactor due to a problem which James Knight has since fixed (THANK YOU) and the process tests were passing. I already have an issue in my queue which describes the problem <http://twistedmatrix.com/bugs/issue654> and I should be fixing it at the latest this weekend. … [View More]

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[Twisted-Python] Re: [Twisted-commits] r15739 - Add TodoTest; peer to SkipTest
by Jean-Paul Calderone Jan. 25, 2006

Jan. 25, 2006

On Wed, 25 Jan 2006 16:32:57 -0700, Wilfredo Sanchez <wsanchez(a)wolfwood.twistedmatrix.com> wrote: >Author: wsanchez >Date: Wed Jan 25 16:32:56 2006 >New Revision: 15739 > >Modified: > trunk/twisted/trial/unittest.py >Log: >Add TodoTest; peer to SkipTest > > [snip] >@@ -467,8 +483,9 @@ > if len(f.value.args) > 0: > reason = f.value.args[0] > else: >- warnings.warn(("Do not raise unittest.SkipTest … [View More]

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[Twisted-Python] Re: [Twisted-commits] r15740 - Add tests for TodoTest.
by Jean-Paul Calderone Jan. 25, 2006

Jan. 25, 2006

On Wed, 25 Jan 2006 16:43:17 -0700, Wilfredo Sanchez <wsanchez(a)wolfwood.twistedmatrix.com> wrote: >Author: wsanchez >Date: Wed Jan 25 16:43:17 2006 >New Revision: 15740 > >Modified: > trunk/twisted/trial/test/test_tests.py > trunk/twisted/trial/unittest.py >Log: >Add tests for TodoTest. >Fix makeTodo(failure). > > [snip] >@@ -65,7 +66,7 @@ > errors = [errors] > return Todo(reason=reason, errors=errors) > if … [View More]

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[Twisted-Python] twistd question
by Ross Jekel Jan. 25, 2006

Jan. 25, 2006

Hello, I have a small design problem I'm trying to get my head around regarding twistd with respect to lauching worker subprocesses. I have a requirement for every process on my server to be able to communicate to an existing message queuing system. The interface to this message queuing system requires that all processes be a "server" so that they can receive async messages. I have that all working fine and have the interface to the external system wrapped up in a nice service, as it us … [View More]

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[Twisted-Python] Weekly Bug Summary
by James Y Knight Jan. 25, 2006

Jan. 25, 2006

Bug summary ______________________ Since 2006-01-18 06:00:01.870000: Bugs opened: 25 Bugs closed: 8 Total open bugs: 550 (+17) Urgent: 9 (+0) Bug: 264 (+10) Feature: 187 (+5) Wish: 90 (+2) New / Reopened Bugs ______________________ ==== Urgent ==== [TRIAL] trial's minimal reporter is broken (6 days ago) http://twistedmatrix.com/bugs/issue1426 opened by itamarst ==== Bug ==== [TRIAL, WIN32] trial hangs indefinitely on win32er (11 … [View More]

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[Twisted-Python] Still fighting "twisted.names.client"
by Jesus Cea Jan. 24, 2006

Jan. 24, 2006

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 I started a thread a month ago, with no luck yet. <http://twistedmatrix.com/pipermail/twisted-python/2005-December/012162.html> I have a reduced test case, for ease diagnosis. I hope Jean-Paul Calderone can have a look at the issue. My current "simple" code (not the real application, of course) is: ===== File "dns4.tac" ===== from twisted.application import service application = service.Application("DNS test") import sys sys.path=["."]+… [View More]sys.path from dns4 import DomainResolver DomainResolver().setServiceParent(application) ==================== ===== File "dns4.py" ===== class resolution(object) : def __init__(self,domain) : global myResolver d = myResolver.lookupMailExchange(domain,timeout=(5,)) d.addCallbacks(self._cbMailExchange, None) def _cbMailExchange(self,results): # Callback for MX query print "XX",repr(results) from twisted.internet import reactor reactor.stop() return from twisted.application import service class DomainResolver(service.Service): def startService(self) : global myResolver from twisted.names import client myResolver=client.Resolver(servers=[('127.0.0.1', 53)]) resolution("argo.es") #resolution("argo.es") ==================== I launch the application with "twistd -n -y dns4.tac". I get the following error: "twisted.names.dns.DNSDatagramProtocol (UDP)] Unexpected message (32863) received from ('127.0.0.1', 53)". Apparently Twisted is sending the DNS request (and getting the DNS answer) before setting up the handling object. If I uncomment the last line, to do two resolutions, the reactor is not stoped, but an infinite loop is created, with the following (infinite) error: ===== 2006/01/24 17:39 CET [twisted.names.dns.DNSDatagramProtocol (UDP)] Traceback (most recent call last): File "/usr/local/lib/python2.4/site-packages/twisted/python/log.py", line 43, in callWithContext return context.call({ILogContext: newCtx}, func, *args, **kw) File "/usr/local/lib/python2.4/site-packages/twisted/python/context.py", line 59, in callWithContext return self.currentContext().callWithContext(ctx, func, *args, **kw) File "/usr/local/lib/python2.4/site-packages/twisted/python/context.py", line 37, in callWithContext return func(*args,**kw) File "/usr/local/lib/python2.4/site-packages/twisted/internet/selectreactor.py", line 139, in _doReadOrWrite why = getattr(selectable, method)() --- <exception caught here> --- File "/usr/local/lib/python2.4/site-packages/twisted/internet/udp.py", line 113, in doRead data, addr = self.socket.recvfrom(self.maxPacketSize) exceptions.AttributeError: 'Port' object has no attribute 'socket' ===== Somebody could help me?. This issue is a showstopper in my twisted learning :(. Thanks in advance for your time. - -- Jesus Cea Avion _/_/ _/_/_/ _/_/_/ jcea(a)argo.es http://www.argo.es/~jcea/ _/_/ _/_/ _/_/ _/_/ _/_/ _/_/ _/_/ _/_/_/_/_/ PGP Key Available at KeyServ _/_/ _/_/ _/_/ _/_/ _/_/ "Things are not so easy" _/_/ _/_/ _/_/ _/_/ _/_/ _/_/ "My name is Dump, Core Dump" _/_/_/ _/_/_/ _/_/ _/_/ "El amor es poner tu felicidad en la felicidad de otro" - Leibniz -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.2 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iQCVAwUBQ9Za75lgi5GaxT1NAQLNogQAhsMS+inrIuVGuOg+QuP/6qyYMPMg6GRJ f3s9zUONp9YaPD03uysNA0UfzR4SO4BN5h40mciQUUx4YnxZl1MpSwqf8jHNYnWh wgJ7FsY6rjYeYNke7exBteMt2eNSdffATv6hpNqPVYx8KpJGDMyN+pkxRN+cJbfy i0lmC5EXQj8= =LWe7 -----END PGP SIGNATURE----- [View Less]

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[Twisted-Python] newbie question
by john peter Jan. 23, 2006

Jan. 23, 2006

i tried to run the simpleserv.py and simpleclient.py examples in windows xp, but i keep getting the below trace back. could somebody please give me a hand and tell me what i might be doing wrong? thanks! >>> Server said: hello, world! connection lost Connection lost - goodbye! Traceback (most recent call last): File "C:\pythonWork\simpleclient.py", line 52, in ? main() File "C:\pythonWork\simpleclient.py", line 48, in main reactor.run() File "C:\… [View More]

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[Twisted-Python] Running a PBServerFactory TCP Server as a Win32 Service.
by william.lewis＠uk.bnpparibas.com Jan. 23, 2006

Jan. 23, 2006

Hi I am attempting to run a PBServer as a win32 service using the following code: import win32serviceutil import win32service import win32event from twisted.spread import pb from twisted.internet import reactor import node class NodeService(win32serviceutil.ServiceFramework): _svc_name_ = 'NodeService' _svc_display_name_ = 'Node Server' def __init__(self, args): … [View More]

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[Twisted-Python] Send/Receive UDP Packet
by Sbaush Jan. 23, 2006

Jan. 23, 2006

Hi all. In my application I have to do implement a lot of networking in python My application can create with a GUI a XML file in a string. This string has to be sended to another host. i need a python application that send this string via UDP. The packet of this communication is |int|payload| where payload is the XML string and int is an integer(size of packet). After the send my application has to wait for a response from the other host and has to receive response. This should be implemented … [View More]

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