Mailman 3 November 2011 - Twisted

[Twisted-Python] Rts/Cts Serial port flow control in twisted
by dsturmfels＠gmail.com Dec. 1, 2011

Dec. 1, 2011

Hi, Has anyone had much experience with serial flow control in twisted? I've been using a twisted serial port in my gtk+ software for quite a while now, and I can get xonxoff flow control to work, but for some reason, rtscts flow control isn't working (or I may be using it wrong). I'm connecting the software, via a usb-serial cable, to a Datalogic barcode scanner cradle. I've been able to replicate this problem with pyserial as well. Without flow control on, I can for example, send a particular serial string to the cradle, and the cradle replies instantly with it's software version (as a string). If I scan a barcode, this also instantly shows up in twisted/pyserial/etc (as a string). With xonxoff flow control on in both the software and cradle, the serial connection works exactly the same as having no flow control on. With rtscts flow control on in both the software and cradle however, the cradle doesn't reply instantly with it's software version when the correct string is sent. However, a scanned barcode shows up instantly in the twisted/pyserial software, and if you've previously requested the cradle software version, the software version string only shows up directly after receiving a barcode string. Am I doing something wrong, or does anyone know what might be going on here? Thanks, Darcy.

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[Twisted-Python] XML-RPC Server in multiservice application
by Don Schoeman Nov. 27, 2011

Nov. 27, 2011

I've got a multiservice application running and I'm using the MultiService class from twisted.application.service to do this. All my existing services are setup as children of my multiservice instance. In addition I'd like to run an XML/RPC server as as well. Is it ok if I instantiate the XML/RPC listening server as per the examples? r = MyXMLRPCServer() reactor.listenTCP(7080, server.Site(r)) I've tried this and it does seem to peacefully co-exist alongside the other services, but is this the correct way of implementing the XML/RPC server on a multiservice application? Kind Regards, Don Schoeman

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[Twisted-Python] Weekly Bug Summary
by exarkun＠twistedmatrix.com Nov. 27, 2011

Nov. 27, 2011

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[Twisted-Python] Twisted FTP: Data must not be unicode
by Tobias Oberstein Nov. 25, 2011

Nov. 25, 2011

Should I file a bug? If so, any guidelines what to do? --- <exception caught here> --- File "/home/autobahn/python/lib/python2.7/site-packages/Twisted-11.1.0_r33225-py2.7-freebsd-8.2-RELEASE-p3-i386.egg/twisted/internet/defer.py", line 545, in _runCallbacks current.result = callback(current.result, *args, **kw) File "/home/autobahn/python/lib/python2.7/site-packages/Twisted-11.1.0_r33225-py2.7-freebsd-8.2-RELEASE-p3-i386.egg/twisted/protocols/ftp.py", line 907, in gotListing self.dtpInstance.sendListResponse(name, attrs) File "/home/autobahn/python/lib/python2.7/site-packages/Twisted-11.1.0_r33225-py2.7-freebsd-8.2-RELEASE-p3-i386.egg/twisted/protocols/ftp.py", line 421, in sendListResponse self.sendLine(self._formatOneListResponse(name, *response)) File "/home/autobahn/python/lib/python2.7/site-packages/Twisted-11.1.0_r33225-py2.7-freebsd-8.2-RELEASE-p3-i386.egg/twisted/protocols/ftp.py", line 385, in sendLine self.transport.write(line + '\r\n') File "/home/autobahn/python/lib/python2.7/site-packages/Twisted-11.1.0_r33225-py2.7-freebsd-8.2-RELEASE-p3-i386.egg/twisted/internet/_newtls.py", line 180, in write FileDescriptor.write(self, bytes) File "/home/autobahn/python/lib/python2.7/site-packages/Twisted-11.1.0_r33225-py2.7-freebsd-8.2-RELEASE-p3-i386.egg/twisted/internet/abstract.py", line 300, in write raise TypeError("Data must not be unicode") exceptions.TypeError: Data must not be unicode [autobahn@autobahnhub ~/Twisted]$ svn diff twisted/protocols/ftp.py Index: twisted/protocols/ftp.py =================================================================== --- twisted/protocols/ftp.py (revision 33225) +++ twisted/protocols/ftp.py (working copy) @@ -382,7 +382,7 @@ self._onConnLost.callback(None) def sendLine(self, line): - self.transport.write(line + '\r\n') + self.transport.write(str(line) + '\r\n') def _formatOneListResponse(self, name, size, directory, permissions, hardlinks, modified, owner, group):

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[Twisted-Python] Sending a "good-bye message" before closing a connection
by Albert Brandl Nov. 23, 2011

Nov. 23, 2011

Hi! We have a small heartbeat-system based on Twisted. The clients register at the server and send some health information in regular intervals. If the server does not get a lifesign from a client, this is registered in a database. But sometimes, the clients have to go offline. In this case, I'd like them to send a message to the server that they will be gone for a while. When a client goes offline, the twistd daemon for handling the heartbeats is shut down. What is the best way to do this in Twisted? The `clientConnectionLost` method of the factory is only called after disconnecting, AFAICT. Thanks & best regards, -- Albert Brandl A-4813 Altmünster - Abteistraße 12 - web: www.weiermayer.com - phone: +43761287677 - fax: +43761220356 - mobile: +436642442777

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[Twisted-Python] Twisted 11.1.0 Released
by Thomas Hervé Nov. 23, 2011

Nov. 23, 2011

On behalf of Twisted Matrix Laboratories, I am pleased to announce the release of Twisted 11.1. Highlights of the 185 tickets closed include: * The poll reactor as default where applicable, instead of select everywhere. * A new SSL implementation only relying on OpenSSL for cryptography, (not I/O) making it more robust. * Several improvements to the fresh HTTP/1.1 client implementation, including proxy and cookie support. * My personal favorite: a new howto has been published on test-driven development with Twisted. * A special mention to the new abortConnection support on TCP and SSL connections, heroically pushed by Itamar and Jean-Paul, and the oldest ticket closed by this release. This is the last release supporting Python 2.4 (the support on Windows stopped with 11.0). For more information, see the NEWS file here: http://twistedmatrix.com/Releases/Twisted/11.1/NEWS.txt Download it now from: http://pypi.python.org/packages/source/T/Twisted/Twisted-11.1.0.tar.bz2 or http://pypi.python.org/packages/2.5/T/Twisted/Twisted-11.1.0.win32-py2.5.msi or http://pypi.python.org/packages/2.6/T/Twisted/Twisted-11.1.0.win32-py2.6.msi or http://pypi.python.org/packages/2.7/T/Twisted/Twisted-11.1.0.win32-py2.7.msi Thanks to the supporters of the Twisted Software Foundation and to the many contributors for this release. -- Thomas

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[Twisted-Python] Twisted on PyPy
by Reza Lotun Nov. 21, 2011

Nov. 21, 2011

Hi All, I was just wondering if anyone is running (or has tested) their production stack of Twisted on PyPy. Since 1.7 has just been released, I'd like to play around with running our unit tests and running a production test at some point. One concern I have is support for pyOpenSSL on PyPy. According to http://as.ynchrono.us/2011/04/pyopenssl-on-pypy.html as of April that effort was progressing, just wondering if there are any updates on that front? I also stumbled on https://github.com/svpcom/pyopenssl-pypy which claims to be a branch of pyOpenSSL that works with PyPy. Has anyone used it? Thanks, Reza -- Reza Lotun mobile: +44 (0)7521 310 763 email: rlotun(a)gmail.com work: rlotun(a)twitter.com @rlotun

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[Twisted-Python] Does anyone use ampoule in production?
by gelin yan Nov. 21, 2011

Nov. 21, 2011

Hi all. just a few hours ago, I discovered ampoule is probably a right choice to run my analyze codes. I want to know whether your guys have used it for production purposes or not It seems the development has been frozen for a while and I noticed many bugs reported on the board. Some bugs looks like quite serious for example: a bug mentioned occasionally, startWorker may generate double process until the system hanging. If those bugs still exist, i am gonna try to fix some of them if it is impossible. Regards GELIN YAN

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[Twisted-Python] Weekly Bug Summary
by exarkun＠twistedmatrix.com Nov. 20, 2011

Nov. 20, 2011

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[Twisted-Python] Twisted for Python 3
by Antoine Pitrou Nov. 19, 2011

Nov. 19, 2011

Hello, I'm announcing an experimental, work-in-progress port of Twisted to Python 3. The homepage, where you can find more detailed information, is at https://bitbucket.org/pitrou/t3k First step is to have core functionality (basic infrastructure, the various reactors, transports, etc.) working. This is test-driven, since Twisted has mostly excellent coverage. We are pretty much there. The current status is: The following tests pass: All of twisted/internet/test/* All of twisted/trial/test/* All of twisted/python/test/* Some of twisted/test: including test_amp, test_application, test_banana, test_defer, test_defgen, test_internet, test_jelly, test_log, test_logfile, test_paths, test_pb, test_persisted, test_protocols, test_ssl, test_sslverify, test_tcp, test_threads, test_threadpool, test_twistd, test_udp, test_unix... The following scripts are known to work: trial twistd Feedback and contributions welcome. If you are interested in helping, please go and read the link above, it will give you suggestions. Regards Antoine.

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