Mailman 3 September 2005 - 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. ______ __ __ _____ _ _ | ____ | \_/ |_____] |_____| |_____| |_____ | | | | @ 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 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 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] 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 python; also on linux. I've tracked down the problem to be twisted itself (or my incorrect use of it) rather than my code. This example illustrates it: ------------------------------------------------- from twisted.internet import reactor from twisted.internet.protocol import ProcessProtocol class MyProt( ProcessProtocol ): def processEnded(self, reason): print "ended.", reason executable = '/bin/touch' args = ( '/tmp/foo.txt', ) args = (executable,) + tuple(args) reactor.spawnProcess( MyProt(), executable, args ) reactor.callLater( 5, reactor.stop ) #reactor.run() reactor.run(installSignalHandlers=False) ------------------------------------------------- As is, this code never runs the "processEnded()" method of MyProt(). If I change the reactor.run() parameter to leave the signal handlers on, it works. Note that I need to leave the signal handlers turned off because I can't run the reactor in the main thread; Webware needs that. I also know that the subprocess is giving up its file descriptors; I can see that if I put more print statements into MyProt(). And I know that the subprocess is working; /tmp/foo.txt is there. It seems that somehow the reactor is using signals to notice when a process has ended; this makes a certain ammount of sense intuitively, though I don't understand the nitty-gritty of processes and signals at all. And more importantly, this has worked before on other combinations of twisted/python. Is this a bug? If so, has it been fixed? If not, what should I do to detect when a spawned process is finished? Thanks very much. Twisted rocks.

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[Twisted-Python] Re: [Twisted-commits] r14614 - Describe log.debug, and 'printed' and 'debug' log dict items.
by Itamar Shtull-Trauring Oct. 5, 2005

Oct. 5, 2005

On Thu, 2005-09-29 at 23:17 -0600, Andrew Bennetts wrote: > Author: spiv > Date: Thu Sep 29 23:17:15 2005 > New Revision: 14614 > > Modified: > trunk/doc/core/howto/logging.xhtml > Log: > Describe log.debug, and 'printed' and 'debug' log dict items. log.debug should die, I think. So it probably shouldn't be documented :)

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[Twisted-Python] twisted.vfs issues
by James Y Knight Sept. 29, 2005

Sept. 29, 2005

So, starting to look through twisted.vfs, I'm finding a few things that need work. 1) I see no way of reading from or writing to a file in ivfs.IFileSystemLeaf. 2) createFile is racy -- it requires opening a file by the given name, with default permissions, then immediately closing it. In addition, it doesn't specify whether it's an error if the file already exists. 3) Looks like all operations are blocking? What about a remote vfs? I think every operation in the vfs interface ought to be non-blocking. 4) IFileSystemNode.remove doesn't say whether it's a recursive delete (on a directory), and .rename don't specify whether newName can be in a different directory, whether it replaces an existing file, or whether it works on a directory. 5) Errors are coarse-grained. Everything is a VFSError, and the only detailed information is in human-readable text, not any nice computer- readable form. 6) Need some support in the interface for extended attributes. That's it for now. James

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[Twisted-Python] Twisted test problems on Windows (conch, web2)
by Itamar Shtull-Trauring Sept. 29, 2005

Sept. 29, 2005

Hi, There are appear to be various import errors and related problems on Win32 you can see e.g. at http://twistedmatrix.com/buildbot/win32/builds/690/default/2 which could be easily fixed. So, if you have the time please take a look at fixing these. Thanks!

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[Twisted-Python] how to unittest the deferred
by Hyungyong Kim Sept. 28, 2005

Sept. 28, 2005

Hi all, I'm newbie of Twisted. It's my first posting to this mail list. I'm sorry for my stupid question. Because I'm not familiar with asnyc programming, I'm suffering with deferred. So I want to make unittest to check result easily as follow. """ from twisted.trial import unittest from twisted.internet import defer, reactor def someFunction(): d = defer.Deferred() d.addCallback(gotValue) return d def gotValue(myExpect): return "result" class SomeTest(unittest.TestCase): def test1(self): self.assertEquals('result', unittest.deferredResult(someFunction())) """ But this test is not working. How can I check the "result" value. Thanks for your kind support. Hyungyong

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[Twisted-Python] Re: [Twisted-commits] r14589 - finally add readChunk, writeChunk to ivfs.IFileSystemLeaf 's interface
by Jp Calderone Sept. 28, 2005

Sept. 28, 2005

On Wed, 28 Sep 2005 11:48:32 -0600, Andy Gayton <andy(a)wolfwood.twistedmatrix.com> wrote: >Author: andy >Date: Wed Sep 28 11:48:31 2005 >New Revision: 14589 > >Modified: > trunk/twisted/vfs/ivfs.py >Log: >finally add readChunk, writeChunk to ivfs.IFileSystemLeaf 's interface > >Modified: trunk/twisted/vfs/ivfs.py >============================================================================== >--- trunk/twisted/vfs/ivfs.py (original) >+++ trunk/twisted/vfs/ivfs.py Wed Sep 28 11:48:31 2005 >@@ -46,6 +46,18 @@ > def close(self): > """closes this node""" > >+ def readChunk(self, offset, length): >+ """ >+ Leaf should have been previously opened with suitable flags. >+ Reads length bytes or until the end of file from this leaf from >+ the given offset. >+ """ >+ >+ def writeChunk(self, offset, data): >+ """ >+ Leaf should have been previously opened with suitable flags. >+ Writes data to leaf from the given offset. >+ """ > It bothers me that this API differs from stable API for moving piles of bytes, the *other* somewhat controversial newly introduced API for moving piles of bytes around, and the third API being toyed with which is also for moving piles of bytes around. To all the VFS hackers, could we put some effort into not introducing a fourth API? Jp

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[Twisted-Python] wxpython lockup
by Thys Meintjes Sept. 28, 2005

Sept. 28, 2005

Greets, I'm currently refactoring a multi threaded wxPython app to use twisted and adbapi. I've based my code ion the wx demo in the twisted distribution e.g: from twisted.internet import wxreactor wxreactor.install() from twisted.internet import reactor ... reactor.registerWxApp(app) reactor.run(0) The app loads and then freezes, sometimes some of the widgets remain active for a few seconds before freezing up. No other threads have been started by this time. What gives ? Is the wxreactor stable an ready for production ? Ubuntu 5.4 (2.6.10-5-386) wxPython 2.6 thanks -- Thys Meintjes <thys(a)quaint.co.za>

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Re: [Twisted-Python] pb over twisted ssh?
by Brian Warner Sept. 28, 2005

Sept. 28, 2005

> The obvious improvement is to use ssh, and its credentials, instead. > (The server already knows the clients' SSH keys.) I don't have any advice to offer about using SSH, other than saying that yeah, that'd be cool. I'd point out that I think you might be talking about two separate things: one part is to run the PB connection inside an encrypted SSH session. The other part is to use SSH keys as PB login credentials. I consider the first part more useful, because that's how you would achieve transport-layer privacy. You could achieve similar things by sending the PB connection through a tunneled socket, but it would be kind of grotty. What I will mention is that, in newpb, connections are run over SSL by default, and the PB-URLs that identify endpoints are secure references to those endpoints (they include a hash of the SSL key), so you get encryption and authentication for free. cred has not yet been dragged into newpb, but it won't be too much work once someone figures out what exactly they want out of such a combination :). cheers, -Brian

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