Mailman 3 August 2007 - Twisted

[Twisted-Python] Chat server
by Tomas Neme 29 Aug '07

29 Aug '07

I'm making an MMO game with several "levels" that will be distributed over different servers and need a centralized chat server. The general idea was to make an IRC (exarkun recommended Jabber but this is just a detail) server with channels like #all #<guild> #<room>, etcetera, and make the game client logon into it and let it handle all the chat data. I've been reading t.words's tap and service but I'm not getting the general idea of what a chat service (with probably an offline messaging service) should look like, and what does all of the stuff underneath words do, and wether I need it or not if I'm not going to be multi-protocol'ed Does anyone have a few pointers on what should I read before getting myself into it? words' documentation is not exactly throughout, so I'm kind of lost here Tomás (Lacrymology) -- |_|0|_| |_|_|0| |0|0|0|

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[Twisted-Python] Reactor takes a long time to shutdown
by Richard Wall 28 Aug '07

28 Aug '07

I'm giving a talk "An introduction to Twisted" at PyconUK and am trying to come up with some simple examples. One of these, is the attached PortCheck module, that is supposed to attempt connection to a range of ports and report whether they're open, closed, filtered (timeout). It works okay when run against localhost, or another machine on my local network, but I've noticed that when I run it against an internet host, the reactor takes ages to shutdown after scanning all the ports. I wondered if there was anything obviously wrong with the code. Run it as follows from bash: python portcheck.py www.google.co.uk {1..1000} Thanks in advance for any suggestions. -RichardW.

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[Twisted-Python] Graceful shutdown of Twisted daemon
by Chris Miles 28 Aug '07

28 Aug '07

I have a Twisted app that is often waiting for child processes (calls to external commands). I'd like to make the app gracefully shutdown by default. As in, when the app is killed I want to make sure that any currently running child processes can complete and the results of their work can be processed before the daemon dies. What would be the best way to achieve this? Can I override the SIGTERM signal handler so that it waits for other events to complete before allowing the app to die? Cheers Chris Miles

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[Twisted-Python] SMS Protocol UCP /EMI
by Pascal Bach 28 Aug '07

28 Aug '07

Hello I'm currently searching for an UCP / EMI protocol implementation. I'm currently experimenting with twisted. Before I go further with my implementation work I would like to ask, if there are others interested in an UCP / EMI protocol implementation or in a generic SMS Protocol implementation in particular. Maybe somebody has already done some work on that? Thank you Best Regards Pascal

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[Twisted-Python] SSH agent
by stefan.lange＠ubs.com 27 Aug '07

27 Aug '07

Hi all, is there example code how to use an SSH agent with Twisted Conch? How stable is this functionality, would you recommend to use it or would you rather opt for other approaches for having Python scripts use an SSH agent? Regards, stefan

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[Twisted-Python] Weekly Bug Summary
by exarkun＠twistedmatrix.com 26 Aug '07

26 Aug '07

Bug summary ______________________ Summary for 2007-08-19 through 2007-08-26 Bugs opened: 14 Bugs closed: 8 Total open bugs: 1020 (+6) |== Type Changes |== Priority Changes |== Component Changes |Defect: +5 |Highest: -4 |Core: +3 |Enhancement: +0 |Normal: +10 |Names: -1 |Task: +1 |Pb: -2 |Trial: +4 |Website: +1 |Words: +1 New / Reopened Bugs ______________________ ===== Normal ===== [#2791] [Patch] Bad boundary check when parsing a Socks4a packet (opened by adam.lofts) defect core http://twistedmatrix.com/trac/ticket/2791 [#2792] twisted.trial.test_runner.DryRunMixin is shaky (opened by therve) defect trial http://twistedmatrix.com/trac/ticket/2792 [#2793] trial's force-garbage-collection flag doesn't affect testSuite/test_suite generated tests (opened by exarkun) defect trial http://twistedmatrix.com/trac/ticket/2793 [#2794] CapturingReporter has no addError method (opened by exarkun) defect trial http://twistedmatrix.com/trac/ticket/2794 [#2795] trial should not print tracebacks for expected failures (opened by spiv) defect trial http://twistedmatrix.com/trac/ticket/2795 [#2796] trial should not print tracebacks for expected failures (opened by spiv) (CLOSED, duplicate) defect trial http://twistedmatrix.com/trac/ticket/2796 [#2797] Can't use "“" in a bug description (opened by spiv) defect website http://twistedmatrix.com/trac/ticket/2797 [#2798] Can't use non-ascii characters in a bug description (opened by spiv) (CLOSED, duplicate) defect website http://twistedmatrix.com/trac/ticket/2798 [#2799] Feature Request:RTP RTCP support (opened by godson) enhancement words http://twistedmatrix.com/trac/ticket/2799 [#2800] Provide t.n.srvconnect with full tests and do a general clean up. (opened by ralphm) task names http://twistedmatrix.com/trac/ticket/2800 [#2801] Link to howto's from API reference docs. (opened by mellis) enhancement core http://twistedmatrix.com/trac/ticket/2801 [#2802] Datagram transports should be able to report datagram losses (opened by Peaker) enhancement core http://twistedmatrix.com/trac/ticket/2802 [#2803] findFailure fails to find the correct failure in a more complicated case (opened by Peaker) defect core http://twistedmatrix.com/trac/ticket/2803 [#2804] LoopingCall does not handle start() correctly from within its called function (opened by Peaker) defect core http://twistedmatrix.com/trac/ticket/2804 Closed Bugs ______________________ ===== Highest ===== [#2312] Twisted Perspective Broker anonymous login support (opened by carlosedp, closed by exarkun, fixed) enhancement pb http://twistedmatrix.com/trac/ticket/2312 [#2639] Allow access to the traceback associated with an error thrown into an inlineCallback (opened by Peaker, closed by Peaker, fixed) defect core http://twistedmatrix.com/trac/ticket/2639 [#2275] Twisted test suite requires too much memory (opened by exarkun, closed by therve, fixed) defect core http://twistedmatrix.com/trac/ticket/2275 [#2777] Fix SRVConnector to deal with bad nameservers. (opened by ralphm, closed by ralphm, fixed) defect names http://twistedmatrix.com/trac/ticket/2777 ===== Normal ===== [#439 ] pb can't use IAnonymous credentials (opened by timothy, closed by exarkun, fixed) enhancement pb http://twistedmatrix.com/trac/ticket/439 [#2798] Can't use non-ascii characters in a bug description (opened by spiv, closed by exarkun, duplicate) defect website http://twistedmatrix.com/trac/ticket/2798 [#2796] trial should not print tracebacks for expected failures (opened by spiv, closed by mithrandi, duplicate) defect trial http://twistedmatrix.com/trac/ticket/2796 [#1908] SRVConnector keeps reconnecting on non-SRV responses (opened by ralphm, closed by ralphm, fixed) enhancement names http://twistedmatrix.com/trac/ticket/1908 Ticket Lifetime Stats ______________________ Oldest open ticket - [#38] Should be a way to create documentation aliases (since 2003-07-12 16:08:03). Newest open ticket - [#2804] LoopingCall does not handle start() correctly from within its called function (since 2007-08-25 22:12:07). Mean open ticket age: 507 days, 7:29:42.671725. Median: 401 days, 1:25:15.464863. Standard deviation: 397 days, 11:32:23.076229. Interquartile range: 494 days, 18:56:16. Mean time between ticket creation and ticket resolution: 120 days, 8:51:46.565540. Median: 14 days, 6:55:00. Standard deviation is 224 days, 8:53:29.079086. The interquartile range is 125 days, 12:43:31. Mean time spent in review: 62 days, 16:08:09.768854. Median: 4 days, 1:03:50. Standard deviation: 136 days, 12:56:48.940480. Interquartile range: 29 days, 2:22:33. Mean number of times a ticket is reviewed: 1.90167865707. Median: 1 Standard deviation: 1.51013270252. Interquartile range: 1. Contributor Stats ______________________ In the last 4 weeks, 18 unique ticket reporters 10 unique ticket reviewers 6 unique ticket resolvers In the last 24 weeks, 80 unique ticket reporters 14 unique ticket reviewers 16 unique ticket resolvers In the last 48 weeks, 157 unique ticket reporters 20 unique ticket reviewers 26 unique ticket resolvers

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[Twisted-Python] Windows maintainership
by Eric Mangold 23 Aug '07

23 Aug '07

I just wanted to let everyone know that I won't be able to maintain Twisted on Windows anymore. The last several months has seen virtually zero effort on my part towards resolving any of the outstanding Windows issues, and the future doesn't look any different. I will be sure to remove myself from the various trac tickets. I will still be around to maintain anything that I've written, and hack on the odd bits of code that affect me. Timothy Fitz is still listed as a maintainer, however. Timothy, could you let us know where you stand? Everyone feel free to go off on tangents here... e.g. do we really need a Windows Maintainer position? Are people getting along just fine as-is? Is there any infrastructure that would help our Windows support efforts? I'm not going to second-guess where we should go from here (if anywhere), but instead I'll let this discussion develop organically... -teratorn

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[Twisted-Python] Digisynd job posting
by ghazel＠gmail.com 23 Aug '07

23 Aug '07

Sorry for what might look like spam, but this job posting for a Twisted developer came through a friend of mine. If anyone has an interest in this just respond to me and I'll forward your info along. I'm quoting here: """ these guys are the founding team of revr and are building the first true web syndication platform for video. they have deals with warner and mtv so far and basically take their videos and generate tons of views for them using some proprietary technology. they are looking to make a senior hire with the following credentials. if you know of anyone in the la or san fran area, i would greatly appreciate an intro. thanks __________________________________ Digisynd is seeking a well-seasoned python developer/manager to help run our software development efforts. Ideally you have: - a passion for Django or/and Twisted - a passion for hot frameworks, such as Ruby-On-Rails - exceptional SQL skills - experience with capturing and reporting off `massive` datasets in real time - extensive experience with web services - both creating and utilizing - a preference for MySQL and Ubuntu - strong bash scripting - experience with distributed version control We prefer candidates to be based out of either the Bay area or Los Angeles. We are a small, energetic team, with a heap of interesting problems to solve in a very entertaining space. """ -Greg

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[Twisted-Python] protocol and transport question
by Luca Politti 23 Aug '07

23 Aug '07

Hi all, I have a problem with a simple client/server communication: I have a server that send the data through "transport" (my class inherit from twisted.internet.protocol.Protocol), every 0.4 seconds. On the client (that now, for test propose are on the same machine) some time I receive two messages concatenated from the server like it send on the same time. Other times, I receive it correctly (in different moments). I tried to debug this situations with print some messages, and I see that twisted sometimes wait "a time" before send data through the channel: on the server, on twisted.internet.tcp.Connection on writeSomeData I add: print "CCCCCCCCCCCCCCCCC", repr(data), time.time() try: # Limit length of buffer to try to send, because some OSes are too .... on my code: print "BBBBBBBBBBBBBBBBBBB", repr(msg), time.time() self.transport.write(str(msg)) and I see (then it's wrong): BBBBBBBBBBBBBBBBBBB '230 XXXXXXXXX\n' 1187693294.84 BBBBBBBBBBBBBBBBBBB '235 XXXXXXXXX 144\n' 1187693295.28 CCCCCCCCCCCCCCCCC '230 XXXXXXXXX \n235 XXXXXXXXX 144\n' 1187693295.28 and when it's right: BBBBBBBBBBBBBBBBBBB '230 XXXXXXXXX \n' 1187693282.89 CCCCCCCCCCCCCCCCC '230 XXXXXXXXX \n' 1187693283.06 BBBBBBBBBBBBBBBBBBB '235 XXXXXXXXX 143\n' 1187693283.28 CCCCCCCCCCCCCCCCC '235 XXXXXXXXX 143\n' 1187693283.28 How solve it? Is there a method for say to twisted (transport) to not wait to send the data? (flush the buffer?) Thanks a lot! Luca

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[Twisted-Python] LoopingCall and object instances
by Ladislav Andel 22 Aug '07

22 Aug '07

Hello, I have got following code: hosts = ['google.com','yahoo.com'] for host in hosts: c = PingContext(num, host) ctx.append(c) l = task.LoopingCall(c.ping) l.start(30.0, False) I create a few object instances and pinging those hosts every 30 secs. I will have another loop through LoopingCall, where I will be checking dynamically changing list and comparing with already been checking hosts. If there is a host missing in the list I will delete the object instance which is not in the list. How can I remove it that it will not be anymore called by LoopingCall? Or how can I add a new object instance to the LoopingCall in case there is new host in the list? Hopefully, it's understandable. Thank you, Lada

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