Mailman 3 April 2005 - Twisted

[Twisted-Python] Any good examples?
by Mel Irizarry April 14, 2005

April 14, 2005

I am in need of a server that will allow multiple clients to connect, take a MySQL Statement from the client, execute it and return the results to the client. Is there a good example that I could download and perhaps modify? I've been reading the Twisted docs since yesterday but I am a bit overwhelmed by the design of the framework. Mktap looks to be the way to go but I need more info especially on the factory and protocol classes. -- Best Regards, Mel Irizarry ----------------------------- I can't go to school 'cause I ain't got a gun I ain't got a gun 'cause I ain't got a job I can't get a job 'cause I can't go to school Lost in America - Alice Cooper

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RE: [Twisted-Python] 2.0 windows installers
by Grant McDonald April 13, 2005

April 13, 2005

Michael, The win installers are available from sourceforge: http://twisted.sourceforge.net/Twisted_NoDocs-2.0.0.win32(installer-rc2)-py2 .3.exe and http://twisted.sourceforge.net/Twisted_NoDocs-2.0.0.win32(installer-rc2)-py2 .4.exe (the docs come with the source distro). Grant -----Original Message----- From: twisted-python-bounces(a)twistedmatrix.com [mailto:twisted-python-bounces@twistedmatrix.com]On Behalf Of Michael Schneider Sent: 08 April 2005 07:34 To: twisted-python(a)twistedmatrix.com Subject: [Twisted-Python] 2.0 windows installers Sorry for the supid question, I have looked around the twisted site and I can't find the windows installer for twisted 2.0. Could some kind person point me to it? Thanks Mike _______________________________________________ Twisted-Python mailing list Twisted-Python(a)twistedmatrix.com http://twistedmatrix.com/cgi-bin/mailman/listinfo/twisted-python

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[Twisted-Python] simple multicast beacon problem ...
by Darran Edmundson April 12, 2005

April 12, 2005

I'm relatively new to Twisted and am struggling to create a multicast beacon with the application framework. This beacon simply sends out a datagram every second, no listening at all. I've appended a short sample program and traceback to this email in the hope that someone can point out the presumably simple usage error. For the life of me I can't spot it. Here's the last bit of the traceback: 2005/04/12 13:15 EST [-] p = udp.MulticastPort(port, protocol, interface, maxPacketSize, self) 2005/04/12 13:15 EST [-] File "/System/Library/Frameworks/Python.framework/Versions/2.3/lib/python2.3/site-packages/twisted/internet/udp.py", line 66, in __init__ 2005/04/12 13:15 EST [-] assert isinstance(proto, protocol.DatagramProtocol) 2005/04/12 13:15 EST [-] AssertionError A quick debug shows that proto is HeartBeatFactory rather than its class attribute protocol. Any help is much appreciated. Cheers, Darran -- Darran Edmundson (darran.edmundson(a)anu.edu.au) ANU Supercomputer Facility Vizlab Australian National University, Canberra, ACT 2600 tel: +61 2 6125-0517 fax: +61 2 6125-5088 ------------------------------------- application.py --------------------------------------------------- from twisted.internet import protocol, reactor from twisted.internet import threads from twisted.application import internet, service class HeartBeat(protocol.DatagramProtocol): def start_protocol(self): self.send_datagram() def send_datagram(self): self.transport.write("message",(self.factory.group,self.factory.port)) self.reactor.callLater(1,self.send_datagram) class HeartBeatFactory(protocol.ServerFactory): protocol = HeartBeat def __init__(self,group,port): self.group = group self.port = port factory = HeartBeatFactory("234.32.23.1", 9999) application = service.Application('HeartBeat') service = internet.MulticastServer(9999, factory, interface='0.0.0.0') service.setServiceParent(application) ------------------------------------- traceback --------------------------------------------------- $ python twistd.py -noy application.py 2005/04/12 13:15 EST [-] Log opened. 2005/04/12 13:15 EST [-] twistd 1.1.1 (/usr/bin/python 2.3.0) starting up 2005/04/12 13:15 EST [-] reactor class: twisted.internet.default.SelectReactor 2005/04/12 13:15 EST [-] Loading application.py... 2005/04/12 13:15 EST [-] Loaded. 2005/04/12 13:15 EST [-] Traceback (most recent call last): 2005/04/12 13:15 EST [-] File "/System/Library/Frameworks/Python.framework/Versions/2.3/lib/python2.3/site-packages/twisted/scripts/twistd.py", line 192, in ? 2005/04/12 13:15 EST [-] run() 2005/04/12 13:15 EST [-] File "/System/Library/Frameworks/Python.framework/Versions/2.3/lib/python2.3/site-packages/twisted/scripts/twistd.py", line 188, in run 2005/04/12 13:15 EST [-] app.run(runApp, ServerOptions) 2005/04/12 13:15 EST [-] File "/System/Library/Frameworks/Python.framework/Versions/2.3/lib/python2.3/site-packages/twisted/application/app.py", line 200, in run 2005/04/12 13:15 EST [-] runApp(config) 2005/04/12 13:15 EST [-] File "/System/Library/Frameworks/Python.framework/Versions/2.3/lib/python2.3/site-packages/twisted/scripts/twistd.py", line 179, in runApp 2005/04/12 13:15 EST [-] startApplication(config, application) 2005/04/12 13:15 EST [-] File "/System/Library/Frameworks/Python.framework/Versions/2.3/lib/python2.3/site-packages/twisted/scripts/twistd.py", line 163, in startApplication 2005/04/12 13:15 EST [-] service.IService(application).privilegedStartService() 2005/04/12 13:15 EST [-] File "/System/Library/Frameworks/Python.framework/Versions/2.3/lib/python2.3/site-packages/twisted/application/service.py", line 188, in privilegedStartService 2005/04/12 13:15 EST [-] service.privilegedStartService() 2005/04/12 13:15 EST [-] File "/System/Library/Frameworks/Python.framework/Versions/2.3/lib/python2.3/site-packages/twisted/application/internet.py", line 53, in privilegedStartService 2005/04/12 13:15 EST [-] self._port = self._getPort() 2005/04/12 13:15 EST [-] File "/System/Library/Frameworks/Python.framework/Versions/2.3/lib/python2.3/site-packages/twisted/application/internet.py", line 68, in _getPort 2005/04/12 13:15 EST [-] return getattr(reactor, 'listen'+self.method)(*self.args, **self.kwargs) 2005/04/12 13:15 EST [-] File "/System/Library/Frameworks/Python.framework/Versions/2.3/lib/python2.3/site-packages/twisted/internet/default.py", line 210, in listenMulticast 2005/04/12 13:15 EST [-] p = udp.MulticastPort(port, protocol, interface, maxPacketSize, self) 2005/04/12 13:15 EST [-] File "/System/Library/Frameworks/Python.framework/Versions/2.3/lib/python2.3/site-packages/twisted/internet/udp.py", line 66, in __init__ 2005/04/12 13:15 EST [-] assert isinstance(proto, protocol.DatagramProtocol) 2005/04/12 13:15 EST [-] AssertionError

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[Twisted-Python] UDP File Copy
by van Aswegen, Marinus (ZA - Johannesburg) April 11, 2005

April 11, 2005

Hi I'm busy writing a small P2P client with Twisted. The primary use will be on a reliable local LAN segment. I would like to use UDP to copy files and the client must be able to accept multiple connections. I have not been able to find any example code via google, any suggestions ? Regs Marinus Important Notice: This email is subject to important restrictions, qualifications and disclaimers ("the Disclaimer") that must be accessed and read by visiting our website and viewing the webpage at the following address: http://www.deloitte.com/za/disclaimer. The Disclaimer is deemed to form part of the content of this email in terms of Section 11 of the Electronic Communications and Transactions Act, 25 of 2002. If you cannot access the Disclaimer, please obtain a copy thereof from us by sending an email to ClientServiceCentre(a)Deloitte.co.za.

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[Twisted-Python] Weekly Bug Summary
by James Y Knight April 11, 2005

April 11, 2005

Bug summary ______________________ Since 2005-04-05 15:31:47.510000: Bugs opened: 7 Bugs closed: 2 Total open bugs: 337 (+5) Urgent: 4 (+1) Bug: 135 (+1) Feature: 129 (+3) Wish: 69 (+0) New / Reopened Bugs ______________________ ==== Urgent ==== [DOCUMENTATION] Twisted dependancy list (5 days ago) http://twistedmatrix.com/bugs/issue967 opened by jknight ==== Bug ==== [DOCUMENTATION] epyrun dies with an internal error (9 hours ago) http://twistedmatrix.com/bugs/issue973 opened by Ycros No .spec file in tarball as indicated by INSTALL file (3 days ago) http://twistedmatrix.com/bugs/issue969 opened by bjorn [NAMES, WIN32] [PATCH] Problems with Twisted Names on Windows (2 days ago) http://twistedmatrix.com/bugs/issue970 opened by jojo ==== Feature ==== Linux inotify support in twisted core (yesterday) http://twistedmatrix.com/bugs/issue972 opened by exarkun cddb client protocol (2 days ago) http://twistedmatrix.com/bugs/issue971 opened by rhymes [DOCUMENTATION] "Deploying Twisted Applications" howto (4 days ago) http://twistedmatrix.com/bugs/issue968 opened by itamarst Bugs Closed ______________________ ==== Bug ==== [CORE] [PATCH] make LoopingCall.stop() stop the loop immediately (1 month ago) http://twistedmatrix.com/bugs/issue911 opened by zooko, closed by exarkun [DOCUMENTATION, LORE] some PB howtos have empty examples (6 days ago) http://twistedmatrix.com/bugs/issue963 opened by warner, closed by warner

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[Twisted-Python] re: shedding root
by mikah＠ceruleansoftware.com April 11, 2005

April 11, 2005

Andrew Bennetts wrote: > TAP file don't do daemonisation, twistd does. twistd works > with both TAP files and TAC files. See the --python/-y option > to twistd, and also > http://twistedmatrix.com/projects/core/documentation/howto/application.html. > > -Andrew. Thanks Andrew. I got it figured out. I've converted my TAP into a TAC. No problems encountered, and I appreciate the fact that I don't need to run mktap in the development cycle. Thanks! mikah

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Re: [Twisted-Python] UDP asynchronous communication
by Adrian Libotean April 10, 2005

April 10, 2005

Trust me I've read the document and after: reactor.listenUDP(...) reactor.run() the *client* just waits for incoming traffic. I know that Twisted is not supposed to be like that. But please take a moment and read this: http://twisted.sourceforge.net/TwistedDocs-1.1.0/howto/udp.html#auto3 before you give me a *prebuilt* answer. Thank you. Tommi Virtanen wrote: > Adrian Libotean wrote: > >> Now the problem I faced is that from the examples I found on the web >> (http://twisted.sourceforge.net/TwistedDocs-1.1.0/howto/udp.html), for >> multicast UDP messages, are done using listenUDP on both sides (server >> and client) and this approach is not good for me because I need a >> non-blocking communication mechanism on the client-side. > > > Sounds _very_ much like you have misunderstood something. > Twisted functionality is almost without exception non-blocking. > Please re-read and try to ask a more specific question.

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[Twisted-Python] UDP asynchronous communication
by Adrian Libotean April 10, 2005

April 10, 2005

Hello, First of all I must let you know that I am new to Twisted. I need to implement a server discovery mechanism for my application. The way I chose to implement it is this: 1. The client, when started, sends a broadcast message requesting servers to make their presence known (UDP broadcast) 2. The server responds to this request using the same port on the sender's IP to reply (UDP normal message) 3. ... Now the problem I faced is that from the examples I found on the web (http://twisted.sourceforge.net/TwistedDocs-1.1.0/howto/udp.html), for multicast UDP messages, are done using listenUDP on both sides (server and client) and this approach is not good for me because I need a non-blocking communication mechanism on the client-side.

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[Twisted-Python] generic enterprise.row.RowObject?
by Henning.Ramm＠mediapro-gmbh.de April 8, 2005

April 8, 2005

Ahoi! For a simple database abstraction module I once wrote some table class. Now I'm trying to port it to twisted and thought it should inherit from enterprise.row.RowObject. (I hope that isn't deprecated?) RowObject urges me to declare all the table properties as class variables. My old class reads this information directly from the database (show fields) to adapt itself to a set of similar tables, and I'd like to keep this feature. Seems like I would need some RowObjectFactory that takes a connection pool and a table name and returns a RowObject - or how would you do this? Best regards, Henning Hraban Ramm Südkurier Medienhaus / MediaPro Support/Admin/Development Dept.

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RE: [Twisted-Python] PB connection
by Henning.Ramm＠mediapro-gmbh.de April 8, 2005

April 8, 2005

>"Connection was refused by other side: 10061: Unknown error." Stupid error - I had a typo in my connection config. Sorry for bothering you. Best regards, Henning Hraban Ramm Südkurier Medienhaus / MediaPro Support/Admin/Development Dept.

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