Mailman 3 April 2004 - Twisted

Re: [Twisted-Python] Re: [Twisted-commits] r10475 - Use writeSequence instead of silly for-loop.
by exarkun＠divmod.com 16 Apr '04

16 Apr '04

On Thu, 15 Apr 2004 13:27:56 -0400, James Y Knight <foom(a)fuhm.net> wrote: > > On Apr 5, 2004, at 10:36 AM, Andrew Bennetts wrote: > > > This is of course quite silly, and I suspect a nice performance > enhancement could be achieved by making FileDescriptor.dataBuffer be a > list of strings, rather than a single string. That would both cause > multiple writes in a row to not allocate new strings, and allow > writeSequence to be implemented sanely. Been there :) FileDescriptor.dataBuffer was a list when I first started hacking around in Twisted's internals. The current implementation is the result of an optimization of that code, and is somewhat (not earth-shatteringly) faster. > > Doesn't look very hard really; looks like you'd only need to touch > write/writeSequence/doWrite. This'd also have the advantage of making > it easier to put a Sendfile-struct in there as well. So pahan's > volunteered to fix this! There are a few other places that need to be touched, but it is certainly doable. The main problem is simply that tcp.py is such a mess. Jp

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[Twisted-Python] Re: [Twisted-commits] r10475 - Use writeSequence instead of silly for-loop.
by James Y Knight 15 Apr '04

15 Apr '04

On Apr 5, 2004, at 10:36 AM, Andrew Bennetts wrote: > Author: spiv > Date: Mon Apr 5 08:36:43 2004 > New Revision: 10475 > > Modified: > trunk/twisted/protocols/http.py > Log: > Use writeSequence instead of silly for-loop. You might not have noticed that writeSequence is implemented like so: self.write("".join(iovec)) thus negating the performance enhancement recently added by not copying large data into a new string. This is of course quite silly, and I suspect a nice performance enhancement could be achieved by making FileDescriptor.dataBuffer be a list of strings, rather than a single string. That would both cause multiple writes in a row to not allocate new strings, and allow writeSequence to be implemented sanely. Doesn't look very hard really; looks like you'd only need to touch write/writeSequence/doWrite. This'd also have the advantage of making it easier to put a Sendfile-struct in there as well. So pahan's volunteered to fix this! Unfortunately, python doesn't expose the writev syscall, which means that you depend on Nagling to not coalesce the TCP packets. There *is* a TCP option which you can use to help fix too many small packets: TCP_CORK on linux and TCP_NOPUSH on FreeBSD. This keeps partial packets from being sent at all until you close the connection or turn off the option (except on older freebsd, where it's broken and you need to turn off the option and call write again to wake it up). I suspect it's worthwhile to set TCP_CORK/TCP_NOPUSH while the python-side buffer has any data left in it, or else the kernel may be deciding to send out small packets when it should be waiting for more data from an upcoming write call and wasting time/bandwidth. Python has the TCP_CORK constant, even, yay! FreeBSD will just have to suffer, I suppose, since python doesn't know about TCP_NOPUSH. James

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[Twisted-Python] twisted and interactive/command driven input
by Ellers 15 Apr '04

15 Apr '04

Dear all, I am implementing a pseudo-shell application in python that communicates with a database-like server. I have been tinkering with twisted for a few weeks and am impressed - I could make a client and imitate the server with a small amount of clean python code! However, I'm not sure how to use twisted (or if it can be done) to do the kind of application I want to do. Specifically, the application will take input from the user or from a file, just like a normal shell, then communicate with the server behind this. I'm sure this is a very well known problem, but I'm not sure where to start - threads? twisted? select-loop? In my app the user will see something like this: myshell$ select * from data results: id title 123 Foo 456 Bar myshell$ and so on. But after typing the select statement, THATS when I want to utilize the power of twisted to send a buffer to the server, then wait for the response and unpack it. To complicate things, the server sends async announcments of change events, e.g. new rows in the database. I want to be able to handle these while still receiving user input (eg print them on the console) I've got a basic interactive shell going on its own no probs, and as mentioned I've got a separate basic twisted client going too. Can anyone point me at examples or tips on how to use twisted for handling the socket comms and still allow interactivity with the user? Thanks - and hope this isn't a really silly question! Ellers

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[Twisted-Python] addCallbacks issue
by Sorin C. 15 Apr '04

15 Apr '04

Hi everyone, I'm using PB in my application and I have problems with addCallbacks call, it's not working as expected, at least what I expect. The following snippet: factory = pb.PBClientFactory() reactor.connectTCP('localhost', 2174, factory) d = factory.getRootObject() d.addCallbacks(self.gotRoot, self.netError) when an error occures self.netError doesn't get called, instead I get something like: "Unhandled error in Deferred:" which I assume is an error message telling me that the deffered is not bound to an error handler. Now if I replace the last line like this: factory = pb.PBClientFactory() reactor.connectTCP('localhost', 2174, factory) d = factory.getRootObject() d.addCallback(self.gotRoot) d.addErrback(self.netError) the error handler gets called and everything is ok. Any idea why addCallbacks fails to bound the error handler? I use Twisted 1.2.0. Thanks, Sorin __________________________________ Do you Yahoo!? Yahoo! Tax Center - File online by April 15th http://taxes.yahoo.com/filing.html

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[Twisted-Python] Status of twisted.xish.xpath
by Valentino Volonghi aka Dialtone 14 Apr '04

14 Apr '04

I was wondering what's the status of the xpath parser in Twisted. I need to write a feed aggregator which does not uses the Mark Pilgrim's parser, since that's a dependency and because that's not a really good piece of software IMHO (it's hard to read and debug). Just look at what has been done here: http://xoomer.virgilio.it/dialtone/rsschannel.py # written by mg from Nevow with Nevow and the current xish.xpath, and now look at how this has been done in the feedparser from Pilgrim. I wonder what could be done with a complete implementation of XPath at developers disposal. There are plenty feeds versions to support like Atom, CDF, RDF and 9 rss versions. Also Nevow would be greatly enanched by an updated xpath implementation. I would like to know if it's actively developed, or if it's 'deprecated' in favour of external xpath implementations. I would really like to avoid telling my clients to install 4Suite or libxml2 or anything else. Just using Twisted would be perfect since it's just 1.6Mb of portable python code (and in future it will be split in various packages, so it's even smaller). Thx for your efforts! -- Valentino Volonghi aka Dialtone Linux User #310274, Gentoo Proud User Blog: http://vvolonghi.blogspot.com Home Page: http://xoomer.virgilio.it/dialtone/

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[Twisted-Python] PythonCard GUI client for pbecho example
by Stephen C. Waterbury 14 Apr '04

14 Apr '04

Here's a PythonCard client that works with the pbecho.py server (I included pbecho.py so it's a self-contained example, but it's the same pbecho.py as in Twisted/doc/examples). Dependencies: PythonCard (http://pythoncard.sourceforge.net) (requires wxPython) Basically, all the logic of tpcpbechoclient was copied directly from pbechoclient.py -- the only functional difference is the capability to repeat the "Send" function. It's pretty self-explanatory, but anyway: * start up server: python pbecho.py * start up client: python tpcpbechoclient.py * when client comes up, click "Login" button -> "CONNECTED" should appear on lower right side of panel (meaning the client received a perspective) * enter something into the text field at the bottom * click "Send" button -> the text should be echoed in the text area widget above (Note: if you have PythonCard installed as PythonCardPrototype, either change the name of your installation to PythonCard or do the substitution in my example code. PythonCard is about to undergo the name change in its next released version. If you use the CVS version, it's already re-named.) Enjoy! - Steve P.S. Itamar: I couldn't get the wxreactor to work with PythonCard; kept getting "AssertionError: reactor already installed", although I followed the directions in wxreactor's docstring. I tried various permutations but finally got tired of messing with it ... let me know if have time to play with it and find a way that works! For now, I'm using my "twistedpythoncard" module, which encapsulates Uwe's timer recipe so the rest of the code can use normal Twisted and PythonCard idioms. That seems to work pretty well, but I will be trying some more non-trivial examples before I declare success.

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[Twisted-Python] [Fwd: [boston-pig] Possible summer internship]
by Itamar Shtull-Trauring 13 Apr '04

13 Apr '04

-- Itamar Shtull-Trauring http://itamarst.org Looking for a job -- http://itamarst.org/resume.html

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[Twisted-Python] RFC: UDP's transport.write() accepting hostnames
by Itamar Shtull-Trauring 12 Apr '04

12 Apr '04

I'd appreciate comments added to the issue - http://www.twistedmatrix.com/users/roundup.twistd/twisted/issue586 -- Itamar Shtull-Trauring http://itamarst.org Looking for a job -- http://itamarst.org/resume.html

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Re: [Twisted-Python] POP3 Client
by Ofir Reichenberg 12 Apr '04

12 Apr '04

>From: <exarkun(a)divmod.com> >Subject: Re: [Twisted-Python] POP3 Client > > I've been trying to build a simple POP3 client using Twisted and have had no > > luck. > > I'm looking for something that retrieves the list of headers waiting on the > > server. > > There is a much nicer POP3 client class in Quotient (which needs to be folded back into Twisted ... when I get the time). I highly recommend using it instead: >http://divmod.org/cvs/trunk/quotient/proto/pop3client.py?rev=2718&root=Quotient&view=markup This looks exactly like what I need. Thanks a lot. > > > > > It appears that to do that I need to build a POP3 factory based on a domain. > > How can I build a domain ojbect for a "real" internet domain? (as opposed to > > a local server) > > I'm not sure what you mean here. What you want to do is something along these lines: > > from twisted.internet import protocol > from wherever import POP3Client > > class MyPOP3Client(POP3Client): > # Override some callbacks, like connectionMade or perhaps serverGreeting > > f = protocol.ClientFactory() > f.protocol = MyPOP3Client > > from twisted.internet import reactor > reactor.connectTCP('internet.host.name', 110, f) > reactor.run() > > The above can be run just like any other Python program (it won't work, of course, as it is an incomplete example). As alternatives to the last three lines, you can use twisted.application and the utility program "twistd" instead. > Hmmm, I see what you mean. I didn't know of the ClientFactory class. This was the answer to my question, but I'll give Quotient a try first. :) Thanks again, Ofir _________________________________________________________________ STOP MORE SPAM with the new MSN 8 and get 2 months FREE* http://join.msn.com/?page=features/junkmail

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[Twisted-Python] PythonCard GUI client for pbecho example
by Stephen Waterbury 12 Apr '04

12 Apr '04

Here's a gui client made with PythonCard that works with the pbecho.py server. How it works: * start up server: python pbecho.py * start up client: python tpcpbechoclient.py * when client comes up, push "Login" -> "CONNECTED" should appear on lower right side of panel (meaning the client received a perspective) * enter something into the text field at the bottom * click "Send" -> the text should be echoed in the text area widget above (Note: if you have PythonCard installed as PythonCardPrototype, either change the name of your installation to PythonCard or do the substitution in my example code. PythonCard is about to undergo the name change in its next released version.) Enjoy! - Steve P.S. Itamar: I couldn't get the wxreactor to work with PythonCard; kept getting "AssertionError: reactor already installed". I tried a lot of things, but finally got tired of messing with it. For now, I'm using my "twistedpythoncard" module, which encapsulates Uwe's timer recipe so the rest of the code can use normal Twisted and PythonCard idioms.

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[Twisted-Python] Clarification for IReactorSSL.ListenSSL(...)
by Carl Waldbieser 11 Apr '04

11 Apr '04

I have been playing with the Twisted framework for a while, and it's really pretty neat! Admittedly, the Interfaces and deffereds threw me for a loop for a while, but I think I'm finally starting to understand some of it. I have already created a simple, stand-alone XMLRPC sever from following the examples in the docs, and now I'm trying to make one that runs over HTTPS. I think that all I should have to do is substitute the IReacorSSL.ListenSSL(...) method for the IReactorTCP.ListenTCP(...) call I am using now, but this is where I am starting to get stuck. One of the parameters for the ListenSSL(...) method is contextFactory. After some digging, I think that the only concrete class available right now for this is DefaultOpenSSLContextFactory? I am not entirely clear what the parameters used to initialize this object mean, though. Specifically, the privateKeyFileName and certificateFileName are a little sketchy from my point of view. I downloaded OpenSSL and read through the docs, and I Googled around for other related articles, etc., but the terminology in all these docs is somewhat difficult for me to digest. Is there some sort of "OpenSSL For Dummies" tutorial I can read to figure out what files I am supposed to generate and what parameters they correspond to in the DefaultOpenSSLContextFactory.__init__(...) method? Also, does anyone know of an easier way for generating certificates than going through all the manual steps in the OpenSSL docs? I want to use SSL because I want two machines to be able to talk to each other without passing sensitive data in the clear, so I am not sure if stuff like certificate authorities really need to fit into the picture. Also, if someone could suggest a simpler way to accomplish a secure XMLRPC connection, I would also be interested in hearing any thoughts on that. Any help is appreciated, Carl Waldbieser

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[Twisted-Python] Re: [Twisted-commits] r10512 - test to make sure xmlns= bug doesn't pop up again
by Andrew Bennetts 10 Apr '04

10 Apr '04

On Fri, Apr 09, 2004 at 01:27:37PM -0600, Jonathan Simms wrote: > Author: slyphon > Date: Fri Apr 9 13:27:37 2004 > New Revision: 10512 > > Modified: > trunk/twisted/test/test_xml.py > Log: > test to make sure xmlns= bug doesn't pop up again > > > Modified: trunk/twisted/test/test_xml.py > ============================================================================== > --- trunk/twisted/test/test_xml.py (original) > +++ trunk/twisted/test/test_xml.py Fri Apr 9 13:27:37 2004 > @@ -447,8 +447,13 @@ > if result: > self.assert_(hasattr(result[0], 'tagName')) > > + def testParseXMLStringWithUnicode(self): > + # this is a regression test. dash fixed something to do with xmlns= > + # and this tests to make sure that a particular case works > [snip massive heap of xml] > + > + node = microdom.parseString(str) Tests like this help me appreciaate why Jim Fulton likes doctest so much. What the hell is this actually testing? Which "particular case" in that XML is the relevant one? I'm rather skeptical that that is a minimal test case, and it certainly isn't a readable one. The only hints given are that it somehow involves parsing, unicode, and xmlns, which isn't very specific. I'm also a little skeptical that the bug and its fix have been properly understood, if no-one has taken the time to figure out a simple way to demonstrate it. Tests are code too, and should be comprehensible and maintainable like any other code. I don't mind this sort of thing as an interim measure, but there wasn't even a single FIXME in this test to suggest that there was anything wrong with it. -Andrew.

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[Twisted-Python] Anyone can tell me what is the advantage of Twisted, compared to JAVA or C AS?
by simon moo 09 Apr '04

09 Apr '04

Hello,everybody. Now I will start up a game program and am choosing a good platform to use.I am interested in Twisted but I don't know it verhy much. Anyone can tell me what is the advantage of Twisted, compared to JAVA or C application server?An d what is the advantage of Twisted for MMP Game programming? Sincerely yours, Simon Moo _________________________________________________________________ Take a break! Find destinations on MSN Travel. http://www.msn.com.sg/travel/

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[Twisted-Python] Connection close identifier
by Daniel Henrique Debonzi 08 Apr '04

08 Apr '04

Hi folks, I have a server-client system where sometimes the server closes the connection and sometimes client closes connection. In each situation I must do diferent things. Is there a way to know in connectionLost method who closes the connection?? I have already look in the reason atribute, but it seems to the same in both cases. Any help?? Thanks -- Daniel Henrique Debonzi - Gerente de Tecnologia Gwyddion Industria e Comércio de Equipamentos Eletrônicos www.gwyddion.com São Carlos, São Paulo Brasil

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[Twisted-Python] follow up: at what point does reactor.run() need to be called?
by Damon Fasching 07 Apr '04

07 Apr '04

Hi, I'm still confused. Here is the working code, again. # ================= server.py ==================== from twisted.spread import pb from twisted.internet import reactor class ServerClass(pb.Root): def remote_shutdown(self): print "server stopping" reactor.stop() reactor.listenTCP(8789, pb.PBServerFactory(ServerClass())) reactor.run() # =========== client.py ============= from twisted.spread import pb from twisted.internet import reactor def gotRootObject(obj): d = obj.callRemote("shutdown") d.addCallback(serverStopped) d.addErrback(remoteCallFailure) def serverStopped(result): print 'server stopped' stop() def remoteCallFailure(reason): print "remote call failed: %s" % (reason.value) stop() def stop(): print "client stopping" reactor.stop() factory = pb.PBClientFactory() reactor.connectTCP("localhost", 8789, factory) d = factory.getRootObject() d.addCallback(gotRootObject) d.addErrback(remoteCallFailure, "getRootObject") reactor.run() ============ And here is a modification to the last lines of client.py which breaks it, in this case causes it to hang. (server does not get the shutdown call and client is not stopped, so it seems the callback for getRootObject is not executed.) factory = pb.PBClientFactory() reactor.connectTCP("localhost", 8789, factory) d = factory.getRootObject() reactor.run() d.addCallback(gotRootObject) d.addErrback(remoteCallFailure, "getRootObject") ============================================== > It doesn't hang, it just gets the root object, but > has no callback to pass it to. Huh? What about the line d.addCallback(gotRootObject)? It's still there, just a little further down, and d is still d, the deferred object returned by getRootObject. Does the call to reactor.run() change the deferred, d? What I really see as a limitation is that it seems that I must connect to all of my servers before starting the reactor, something which is only done once per process. And because of that, I can't interact with any of the servers until I have connected to all of them (because the reactor isn't running before then). For example, why does the client hang if I change the last lines to the following? reactor.run() factory = pb.PBClientFactory() reactor.connectTCP("localhost", 8789, factory) d = factory.getRootObject() d.addCallback(gotRootObject) d.addErrback(remoteCallFailure, "getRootObject") This seems to be an inevitable sequence of calls if I want to be able to connect to a server after having already connected to and intereacted with other servers. Start the reactor, do some stuff, and then at a later point, connect to another server. If I substitute those lines for the original last 6 lines, start the server and start the client...nothing happens. They both just sit there. What have I misunderstood? How can I connect to a server on the fly? > The value, that getRootObject() returns is a Deferred > object. This is a "delayed" function call (which is > also non-blocking), so the *real* rootObject is > passed to the Deferred.callback function. Right, it's the obj argument of the gotRootObject() method in the original code. > -- > mp Thanks, Damon

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Re: [Twisted-Python] POP3 Client
by exarkun＠divmod.com 07 Apr '04

07 Apr '04

On Wed, 07 Apr 2004 01:44:37 +0000, "Ofir Reichenberg" <ofir_r(a)hotmail.com> wrote: >Hello, > > I've been trying to build a simple POP3 client using Twisted and have had no > luck. > I'm looking for something that retrieves the list of headers waiting on the > server. There is a much nicer POP3 client class in Quotient (which needs to be folded back into Twisted ... when I get the time). I highly recommend using it instead: http://divmod.org/cvs/trunk/quotient/proto/pop3client.py?rev=2718&root=Quot… > > It appears that to do that I need to build a POP3 factory based on a domain. > How can I build a domain ojbect for a "real" internet domain? (as opposed to > a local server) I'm not sure what you mean here. What you want to do is something along these lines: from twisted.internet import protocol from wherever import POP3Client class MyPOP3Client(POP3Client): # Override some callbacks, like connectionMade or perhaps serverGreeting f = protocol.ClientFactory() f.protocol = MyPOP3Client from twisted.internet import reactor reactor.connectTCP('internet.host.name', 110, f) reactor.run() The above can be run just like any other Python program (it won't work, of course, as it is an incomplete example). As alternatives to the last three lines, you can use twisted.application and the utility program "twistd" instead. Jp

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[Twisted-Python] POP3 Client
by Ofir Reichenberg 07 Apr '04

07 Apr '04

Hello, I've been trying to build a simple POP3 client using Twisted and have had no luck. I'm looking for something that retrieves the list of headers waiting on the server. It appears that to do that I need to build a POP3 factory based on a domain. How can I build a domain ojbect for a "real" internet domain? (as opposed to a local server) Thanks in advance, Ofir _________________________________________________________________ MSN 8 with e-mail virus protection service: 2 months FREE* http://join.msn.com/?page=features/virus

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[Twisted-Python] at what point does reactor.run() need to be called?
by Damon Fasching 06 Apr '04

06 Apr '04

The following two modules work fine together. # ================= server.py ==================== from twisted.spread import pb from twisted.internet import reactor class ServerClass(pb.Root): def remote_shutdown(self): print "server stopping" reactor.stop() reactor.listenTCP(8789, pb.PBServerFactory(ServerClass())) reactor.run() # =========== client.py ============= from twisted.spread import pb from twisted.internet import reactor def gotRootObject(obj): d = obj.callRemote("shutdown") d.addCallback(serverStopped) d.addErrback(remoteCallFailure) def serverStopped(result): print 'server stopped' stop() def remoteCallFailure(reason): print "remote call failed: %s" % (reason.value) stop() def stop(): print "client stopping" reactor.stop() factory = pb.PBClientFactory() reactor.connectTCP("localhost", 8789, factory) d = factory.getRootObject() d.addCallback(gotRootObject) d.addErrback(remoteCallFailure, "getRootObject") reactor.run() ================================== If the last lines of client.py are modified as follows, everything it still works. dfactory = pb.PBClientFactory() reactor.connectTCP("localhost", 8789, factory) d = factory.getRootObject() d.addCallback(gotRootObject) reactor.run() d.addErrback(remoteCallFailure, "getRootObject") ======================================= However, if the call to reactor.run() is moved any higher in client.py, the client seems to hang. For example, the following modification breaks it. dfactory = pb.PBClientFactory() reactor.connectTCP("localhost", 8789, factory) d = factory.getRootObject() reactor.run() d.addCallback(gotRootObject) d.addErrback(remoteCallFailure, "getRootObject") ============================================= Is there an obvious reason for this that I'm missing? I would like to be able to dynamically connect to new servers after starting my application and intereacting with other servers, and so after already having called reactor.run(). Can I do this? I'm sure it is possible. But the quick test above makes it seem that I have to invoke getRootObject() AND attach a callback to the returned deferred before I can invoke reactor.run(). Thanks, Damon

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[Twisted-Python] attachments for prefious msg: making C extension types Copyable
by Damon Fasching 06 Apr '04

06 Apr '04

Hi, I forgot to attach the code to back up my previous email. Here it is... Damon

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[Twisted-Python] making C extension module types Copyable
by Damon Fasching 06 Apr '04

06 Apr '04

Hi, I am attempting to set up a system around Perspective Broker. A large part of the data which I need to pass around is instances of a rather complex type which I have defined in a C extension module. This type is built of a deeply nested hierarchy of C structures. At some levels of the hierarchy, structure elements include malloced data buffers of arbitrary size. I was hoping for some sort of miracle (see attached code) and, no surprises, it didn't happen :( How do I get my class to inherit from Copyable. (I suspect the answer is I can't.) If I can't, how can I make it copyable (lowercase)? I was hoping that by wrapping MyType in a simple Python class, MyTypeWrapper, which does inherit from Copyable I would be able to pass it around. I still get an InsecureJelly exception for MyType. So it seems classes need to be registered with setCopierForClass even if they are used only as attributes of a class which is being copied. That seems reasonable. But, with a type defined in a C extension module, I don't have a class to setCopierFor... Also, does MyType also need to subclass Copyable in order to setCopierForClass for it? Don't think I can do that either... The second problem is probably more serious, if that's possible. I can't imagine a world generous enough where MyType instances would actually be serialized, deserialized and reconstructed properly on the receiving end, nested structures, malloced buffers and all. Can some suggest a path? I am writing both the client and server code and so was hoping to use Perspective Broker. Serializing the object by hand is going to be a pain, but not impossible. If that's what needs to be done, I am still not sure how to package it for transmission. Thanks for your help, Damon

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[Twisted-Python] making C extension module types Copyable
by Damon Fasching 06 Apr '04

06 Apr '04

Hi, I am attempting to set up a system around Perspective Broker. A large part of the data which I need to pass around is instances of a rather complex type which I have defined in a C extension module. This type is built of a deeply nested hierarchy of C structures. At some levels of the hierarchy, structure elements include malloced data buffers of arbitrary size. I was hoping for some sort of miracle (see attached code) and, no surprises, it didn't happen :( How do I get my class to inherit from Copyable. (I suspect the answer is I can't.) If I can't, how can I make it copyable (lowercase)? I was hoping that by wrapping MyType in a simple Python class, MyTypeWrapper, which does inherit from Copyable I would be able to pass it around. I still get an InsecureJelly exception for MyType. So it seems classes need to be registered with setCopierForClass even if they are used only as attributes of a class which is being copied. That seems reasonable. But, with a type defined in a C extension module, I don't have a class to setCopierFor... Also, does MyType also need to subclass Copyable in order to setCopierForClass for it? Don't think I can do that either... The second problem is probably more serious, if that's possible. I can't imagine a world generous enough where MyType instances would actually be serialized, deserialized and reconstructed properly on the receiving end, nested structures, malloced buffers and all. Can some suggest a path? I am writing both the client and server code and so was hoping to use Perspective Broker. Serializing the object by hand is going to be a pain, but not impossible. If that's what needs to be done, I am still not sure how to package it for transmission. Thanks for your help, Damon

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[Twisted-Python] Twisted and Zope3 components systems
by Christopher Armstrong 05 Apr '04

05 Apr '04

I don't think anybody mentioned this on the list yet. AIUI the concensus made at PyCon was that Twisted would switch to Zope3's component system (with backwards compatibility). Their system seems very hookable and it'll provide everything we need. Their component system will be moved out into a third-party package and both teams will work on it. Itamar has taken responsibility for it for our end of the deal, last I heard. There's an issue in the tracker where progress will hopefully be reported: http://www.twistedmatrix.com/bugs/issue572 -- Twisted | Christopher Armstrong: International Man of Twistery Radix | Release Manager, Twisted Project ---------+ http://radix.twistedmatrix.com/

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Re: [Twisted-Python] example code for imap client
by exarkun＠divmod.com 03 Apr '04

03 Apr '04

On Sat, 3 Apr 2004 17:46:02 +0200, Burkhard.Kayser(a)t-online.de (Burkhard Kayser) wrote: >I want to develop an imap client which filters my mail and moves incomming > mails to certain folders. Is there any example code to start with ? > See either http://divmod.org/cvs/*checkout*/trunk/quotient/grabbers.py?content-type=te… or http://svn.twistedmatrix.com/cvs/*checkout*/trunk/doc/examples/imap4client.… or http://svn.twistedmatrix.com/cvs/*checkout*/trunk/twisted/test/test_imap.py… Jp

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[Twisted-Python] example code for imap client
by Burkhard.Kayser＠t-online.de 03 Apr '04

03 Apr '04

I want to develop an imap client which filters my mail and moves incomming mails to certain folders. Is there any example code to start with ? Burkhard

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[Twisted-Python] nevow debugging
by Lee Harr 03 Apr '04

03 Apr '04

Hi; I tried to contact the twisted-web list, but it seems to be having some issues right now... I hope it is ok to ask here. Does anyone have an example using nevow in conjunction with other web service types? I really like the simplicity of "mktap web --path foo" but my understanding is that twisted web development is going to be nevow based. Can these two things work together? Is there a way to serve nevow pages from a .rpy? I am looking for a way to debug that does not require restarting the server every time I change the nevow .tac file. (like how I can use import mymod reload(mymod) in the .rpy while I am testing). I hope this makes sense. I would probably just go with something very simple, but I need to password protect some of the pages and that seems to indicate using nevow.guard Thank you for your time. _________________________________________________________________ The new MSN 8: advanced junk mail protection and 2 months FREE* http://join.msn.com/?page=features/junkmail

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