Mailman 3 December 2007 - Twisted

[Twisted-Python] Twisted Python 0.7.0 Prerelease Testing
by Glyph Lefkowitz 05 Aug '21

05 Aug '21

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. ______ __ __ _____ _ _ | ____ | \_/ |_____] |_____| |_____| |_____ | | | | @ t w i s t e d m a t r i x . c o m http://www.twistedmatrix.com/~glyph/

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[Twisted-Python] Get IP of connecting client in XMLRPC server
by Remy C. Cool 28 Apr '13

28 Apr '13

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 xmlrpc_whatIsMyAddress(self): return self.transport.getPeer().host > > if __name__ == '__main__': > from twisted.internet import reactor > r = Example() > reactor.listenTCP(7080, server.Site(r)) > reactor.run() > > I want to be able to get the address of the client that calls the xmlrpc > method can anyone help me with this? This solution didn't work because 'transport' isn't a property of the Example class. I'm currently in the process of changing from a customized SimpleXMLRPCServer to a twisted XMLRPC server solution and I need to insert the client IP into the attributes passed to the called xmlrpc method. Anyone who knows the answer and is willing to share the info? Regards, Remy

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[Twisted-Python] Twisted apps + zeroconf, anyone?
by Jarek Zgoda 03 Jan '08

03 Jan '08

I'd like to add auto-discovery feature to my (Twisted) application and I thought I'll use zeroconf to advertize the service to clients in local network. I decided on zeroconf, because the app is a webservice that has to be accessible to multitude of various clients. Unfortunately, the only one library I found barely usable with Twisted is PyZeroconf (the other is avahi, but it seems too tightly bound to gobject to be usable with Twisted). Is this all or I do not know how to use google? Anybody can share any hints on this? Is this feasible idea or there are better ways to achieve what I want? Cheers Jarek Zgoda

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[Twisted-Python] Weekly Bug Summary
by exarkun＠twistedmatrix.com 30 Dec '07

30 Dec '07

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[Twisted-Python] new project using Twisted
by jieryn＠gmail.com 29 Dec '07

29 Dec '07

Greetings, It would be great if you would link to the Sunklus project on your ProjectsUsingTwisted page (http://twistedmatrix.com/trac/wiki/ProjectsUsingTwisted). Sunklus is an ad-hoc distribution file sharing daemon for Gentoo Linux. Find more about it on our webpage, http://sunklus.googlecode.com. Thanks for a great product!! -jesse -- There are 10 types of people in this world, those that can read binary and those that can not.

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[Twisted-Python] Implementation of the Erlang node protocol
by Thomas Hervé 26 Dec '07

26 Dec '07

Hello people, I want to point out to a project I started in my Twisted sandbox to implement the Erlang node protocol: http://twistedmatrix.com/trac/browser/sandbox/therve/erlang. It's vaguely inspired from the py_interface project: http://www.lysator.liu.se/~tab/erlang/py_interface/. What's the content? It allows you to create a hidden Erlang node as a Twisted process, so that you can call methods on another Erlang node and receive calls (like you can do with C or Java with standard erlang distribution). It implements serialization and deserialization for most of the basic types, and both direction RPC. The benefit, of course, is to be able to get all Twisted protocols for free inside an Erlang program, or on the contrary to access Erlang power inside a Twisted server. I'm even writing a lit bit of documention: http://twistedmatrix.com/trac/browser/sandbox/therve/erlang.xhtml?format=raw. I started it hoping to use it for something serious, but I couldn't, so now the project is a bit stalled until someone really use it. I'd be glad if it could be useful for anyone, and I'm willing to help by debugging and adding features. You can contact me on the #twisted channel or on this ML. -- Thomas

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[Twisted-Python] How to configure setup.py for a twistd TAP app
by Chris Miles 23 Dec '07

23 Dec '07

I want to deploy my Twisted app as a Twisted Application Plugin for twistd as per http://twistedmatrix.com/projects/core/documentation/howto/tap.html I want to distribute my app as a tarball, so the user would untar it and run "python setup.py install". Then they would run "twistd myapp" to start it. How do I configure setup.py so that twisted/plugins/myapp.py is created? Where do I create the twisted/plugins directory? (I see how this works if I run twistd from the directory containing twisted/plugins, or if I set PYTHONPATH, but I don't expect my users to have to do this). Cheers, Chris

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[Twisted-Python] Weekly Bug Summary
by exarkun＠twistedmatrix.com 23 Dec '07

23 Dec '07

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[Twisted-Python] Async file I/O with Linux & Twisted
by Michał Pasternak 22 Dec '07

22 Dec '07

Hi, I've spent last few days trying to write a wrapper for libaio. Libaio is a simple Linux-only library, which should in theory support async read/write on a file descriptor. In practice - this depends on many strange requirements and the documentation is basically nonexistent (if you don't count lwn articles and kernel mailing list archives), so that last few days of C coding looked like this: (it's funny how every C coding session looks similar) http://youtube.com/watch?v=-JbhMvzeX7s Just to summarize... * no AIO reads from socket * not every filesystem supported * output buffer must be N-pages long and aligned to page start * file access is unbuffered (yep, no cache!) * ... and it may still - *silently* - block in some circumstances (like, when you run out of "block layer requests", like if I knew, what are those) Anyways, libaio seems to be a cool idea - maybe someday kernel guys will do some more work on it (like, commit those patches which add buffer aio) and it will be possible to do AIO stuff on sockets. On the other hand, I found no way other to be informed about data availability, than periodically reaping events (want libaio and epoll integration? use some more kernel patches...) You can get the module code and read about current linux aio problems here: http://code.google.com/p/twisted-linux-aio/ It is not a general-purpose module - it's tightly tied to Twisted. Only reads are supported ATM and there's no Python queue, only that low level one (see TODO.txt). If you're lucky, you may even see the proof of concept code running - w/o blocking. There are more things to come, especially that async shutil.copyfileobj replacement... :) Sad thing is, that Linux seems to lack much in this area, especially when compared to FreeBSD... -- m PS: I feel glad I didn't started with POSIX aio_* implementation - on Linux it is said to launch a new thread for every fd request! http://www.atnf.csiro.au/people/rgooch/linux/docs/io-events.html - way to go, glibc programmers! I hope things are looking better now, than they were that few years ago...

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[Twisted-Python] Which OpenSSL Package Does Twisted 2.5 Need On Linux? Where can I get it?
by Jonathan Mark 21 Dec '07

21 Dec '07

Running the email server script from Abe Fettig's Twisted book produces the following error: "ImportError: No module named OpenSSL" There are a number of versions of a number of Python modules with a similar name. PyOpenSSL has not been updated since 2004 and only has a .6 version number. Which OpenSSL module or other modules should I install with Twisted 2.5 on Linux in order to avoid this error message. I am using the CentOs 4 version of Linux which is similar to RHEL 4.

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