Mailman 3 February 2005 - Twisted

[Twisted-Python] Weekly Bug Summary
by James Y Knight 26 Feb '05

26 Feb '05

Bug summary ______________________ Since 2005-02-20 17:11:17.550000: Bugs opened: 5 Bugs closed: 2 Total open bugs: 339 (+3) Urgent: 7 (-1) Bug: 136 (+2) Feature: 128 (+0) Wish: 68 (+2) New / Reopened Bugs ______________________ ==== Bug ==== [WEBSITE] Website still refers to copyright assignment (yesterday) http://twistedmatrix.com/bugs/issue903 opened by hypatia [TRIAL] trial --until-failure does not stop on cleanup errors (yesterday) http://twistedmatrix.com/bugs/issue901 opened by spiv [CORE] Possible re-entrancy bug in LineReceiver.resumeProducing? (4 days ago) http://twistedmatrix.com/bugs/issue899 opened by spiv ==== Wish ==== [NAMES] [PATCH] t.names shouldn't depend on t.flow (yesterday) http://twistedmatrix.com/bugs/issue902 opened by marienz Update download page with Python 2.4/1.3.0/Win32 installer (2 days ago) http://twistedmatrix.com/bugs/issue900 opened by moonfallen Bugs Closed ______________________ ==== Urgent ==== [FTP] Strange intermittent failure involving FTP (1 week ago) http://twistedmatrix.com/bugs/issue898 opened by spiv, closed by spiv ==== Bug ==== [TRIAL] Control-C in trial sometimes doesn't stop it. (8 months ago) http://twistedmatrix.com/bugs/issue628 opened by jknight, closed by spiv

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[Twisted-Python] Dealing with an intermittent PB server
by Dave Cook 25 Feb '05

25 Feb '05

I'm rendering the results of a remote method call: def data_tableList(self, ctx, data): ... d = self.pbClientFactory.login(creds) d.addCallback(lambda object: object.callRemote("foo")) return d Works, great if the PB server is up, but if it's down the browser just hangs. Is there a correct way to check that the connection is up at this point? This works: if self.pbClientFactory._broker: d = self.pbClientFactory.login(creds) d.addCallback(lambda object: object.callRemote("getAlertReports")) else: d = [] return d but seems like a hack. Also, ideally, I'd like to attempt a reconnection to the PB server at this point if it's not running. What's the best way to do that? Thanks, Dave Cook

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[Twisted-Python] What's the standard way to catch signals in twisted?
by Yun Mao 24 Feb '05

24 Feb '05

For example, I want to add some specific handlers SIGHUP, SIGINT in addition to what twistd have. How to? Thanks! Yun

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[Twisted-Python] database threads dead
by Yun Mao 24 Feb '05

24 Feb '05

Hi, I'm using twisted.enterprise.adbapi and postgres DB. Sometimes, the threads of adbapi just don't respond. There was no error reported as I insert stuff into the database, however nothing was inserted. I had to use kill -9 to kill twistd process. However, the main thread was working properly. This happened randomly. Any clue? 2.6.10 kernel, ntpl enabled. thx Yun

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[Twisted-Python] Where to catch ssl error exception?
by Yun Mao 24 Feb '05

24 Feb '05

Suppose I'm the ssl server and a client didn't follow ssl protocol somewhere, I can get an exception like following. The qustion is how can I catch it? Yun 2005/02/23 16:49 EST [HTTPChannel,21907,xx.xxx.xx.x] Traceback (most recent call last): File "/usr/lib/python2.3/site-packages/twisted/python/log.py", line 65, in callWithLogger callWithContext({"system": lp}, func, *args, **kw) File "/usr/lib/python2.3/site-packages/twisted/python/log.py", line 52, in callWithContext return context.call({ILogContext: newCtx}, func, *args, **kw) File "/usr/lib/python2.3/site-packages/twisted/python/context.py", line 43, in callWithContext return func(*args,**kw) File "/usr/lib/python2.3/site-packages/twisted/internet/default.py", line 535, in _doReadOrWrite why = getattr(selectable, method)() --- <exception caught here> --- File "/usr/lib/python2.3/site-packages/twisted/internet/tcp.py", line 98, in doRead return Connection.doRead(self) File "/usr/lib/python2.3/site-packages/twisted/internet/tcp.py", line 239, in doRead data = self.socket.recv(self.bufferSize) OpenSSL.SSL.Error: [('SSL routines', 'SSL23_READ', 'ssl handshake failure')] Yun

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[Twisted-Python] some general questions
by Joachim Boomberschloss 23 Feb '05

23 Feb '05

Hello, I'm considering to write a commercial network application in Twisted, and would like to understand it a little better. I have several questions for which I didn't find answers by skimming over the documentation. I'd be happy to add them to the FAQ later! 1. I've used Pyro in the past for networking in Python, and it has a nice name server that enables each part of the application know the others by acting as a central directory of server addresses. Is there anything comparable in Twisted, or maybe a different idiom, other than specifying explicitly in the client configuration the addresses of servers? 2. Pyro also uses a UDP broadcast mechanism to make the name server accessible from every computer in a network, which relieves clients from requiring an explicit specification of the name server's location, which makes it possible to write more friendly, out-of-the-box applications. Is there an implementation of such a thing in Twisted? If not, how complicated is it to make? 3. In the howtos, all client logic is defined before running a reactor (in the protocol or using deferreds); In the case of a GUI client, I would like communication with servers to be trigerred by user actions. How do I define such events? 4. How do I make clients that are also servers? For example, a GUI that acts as a front-end to remote servers, but also accepts random requests (such as chat). 5. It is often desired to send a message to a remote server without requiring any response other than a confirmation that the message was sent. In a previous project, I made a mechanism that accepts such messages, and tries to send them periodically until it succeeds. The sending function is not concerned with the consequences of the request because it is assured that the message with be eventually sent, thus it can send such messages using a simple function call, and without worrying about the results (i.e. catching exceptions, or adding errbacks). Is there anything comparable in Twisted? 6. As I understand it there are three ways to construct a Twisted application: (i) writing a tap plug-in (I think) and using mktap, then running it with twistd, (ii) writing an application configuration file (tac), then running with twistd, and (iii) making a runnable script using reactor.run. What are the benefits of writing a tap plug-in compared with an application configuration file, and what are the benefits of using twistd compared with making an executable script? 7. I want to eventually produce a stand-alone installable application that will be expected to run out-of-the-box. I thought about using py2exe, but couldn't find much information about using it and Twisted together. Are there other common methods to achieve stand-aloneness with Twisted? Thanks, Joe __________________________________ Do you Yahoo!? Read only the mail you want - Yahoo! Mail SpamGuard. http://promotions.yahoo.com/new_mail

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[Twisted-Python] Twisted broken in debian testing
by snacktime 20 Feb '05

20 Feb '05

It seems that the python profile module has been moved to the non-free section in debian, and the twisted package requires it but doesn't list it as a dependancy. The result is that the twisted package is broken unless you add the non-free section to your sources.list and install python2.3-profile. >From my understanding, if twisted continues to require profile, then twisted has to move to non-free also? Is the profile module really needed? Chris

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[Twisted-Python] Weekly Bug Summary
by James Y Knight 20 Feb '05

20 Feb '05

Bug summary ______________________ Since 2005-02-12 19:08:29.950000: Bugs opened: 9 Bugs closed: 9 Total open bugs: 336 (+0) Urgent: 8 (-2) Bug: 134 (+2) Feature: 128 (+0) Wish: 66 (+0) New / Reopened Bugs ______________________ ==== Urgent ==== [FTP] Strange intermittent failure involving FTP (2 days ago) http://twistedmatrix.com/bugs/issue898 opened by spiv ==== Bug ==== threadpool's _worker holding onto references (2 days ago) CLOSED http://twistedmatrix.com/bugs/issue897 opened by dudley [PB] datetime support in jelly/unjelly (3 days ago) http://twistedmatrix.com/bugs/issue894 opened by kkinder [CORE] socket is not closed when connection failed (3 days ago) http://twistedmatrix.com/bugs/issue895 opened by maoy [WIN32] problems with Twisted-2.0.0a1 on Windows (6 days ago) http://twistedmatrix.com/bugs/issue891 opened by manlio problems with twisted.python.dist (6 days ago) CLOSED http://twistedmatrix.com/bugs/issue890 opened by manlio [DOCUMENTATION, WEB] twisted.web docs should talk about request.args and similar for render_POST (5 days ago) http://twistedmatrix.com/bugs/issue892 opened by hypatia ==== Feature ==== [DOCUMENTATION] There should be a doc on how to write tests of Twisted code (3 days ago) http://twistedmatrix.com/bugs/issue896 opened by spiv need an API to determine if the reactor is running (5 days ago) http://twistedmatrix.com/bugs/issue893 opened by anthony Bugs Closed ______________________ ==== Urgent ==== [CORE] backwardsCompatImplements bug (3 weeks ago) http://twistedmatrix.com/bugs/issue873 opened by jknight, closed by jknight [TRIAL] Errors flushed in tearDown still cause test methods to fail (3 months ago) http://twistedmatrix.com/bugs/issue785 opened by exarkun, closed by exarkun ==== Bug ==== threadpool's _worker holding onto references (2 days ago) http://twistedmatrix.com/bugs/issue897 opened by dudley, closed by spiv [CONCH] test_cftp fails for almost any environment other than an svn checkout (2 months ago) http://twistedmatrix.com/bugs/issue830 opened by exarkun, closed by spiv problems with twisted.python.dist (6 days ago) http://twistedmatrix.com/bugs/issue890 opened by manlio, closed by radix [MAIL] smtp.Address class can't deal with NULL address - breaks bounces (11 months ago) http://twistedmatrix.com/bugs/issue541 opened by iko, closed by exarkun [NAMES] [PATCH] twisted.names can't look up information if a domain has AAAA or A6 records and the system doesn't support ipv6 (1 month ago) http://twistedmatrix.com/bugs/issue852 opened by marienz, closed by exarkun ==== Feature ==== [MAIL] Proposed patch to allow smtp.sendmail() to send mail to non-standard ports (2 months ago) http://twistedmatrix.com/bugs/issue806 opened by bostik, closed by exarkun [DOCUMENTATION] Update FAQ about unicode strings (9 months ago) http://twistedmatrix.com/bugs/issue617 opened by loic, closed by hypatia

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[Twisted-Python] message: SSL connection shutdown possibly unreliable
by Andrea Arcangeli 20 Feb '05

20 Feb '05

Hello, I'm calling transport.loseConnection() and I get these errors: 2005/02/20 00:11 CET [cpushare_protocol,0,127.0.0.1] /home/andrea/bin/i686/python/lib/python2.4/site-packages/twisted/internet/tcp.py:203: exceptions.UserWarning: SSL connection shutdown possibly unreliable, please upgrade to ver 0.XX The thing works fine anyway, but I'd like to know what could be going wrong without calling set_shutdown. Does the "upgrade" refers to openssl or pyopenssl? I've pyOpenSSL from CVS and a quite recent version of openssl. Thanks.

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[Twisted-Python] Twisted 1.3.0/Python 2.4/Win32 available
by Cory Dodt 19 Feb '05

19 Feb '05

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Uploaded to sf.net site. Links: http://twisted.sourceforge.net/Twisted-1.3.0.win32-py2.4.exe http://twisted.sourceforge.net/Twisted_NoDocs-1.3.0.win32-py2.4.exe Please update website etc. Thanks :) C -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.5 (MingW32) Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org iD8DBQFCF3hV3A5SrXAiHQcRAkwIAJ0TCPnaOZjEgZpsRyUMq1X6RDPzWwCggfnB fI5Dt+hh9fDYPXFTTNT9Fek= =k5ac -----END PGP SIGNATURE-----

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Twisted February 2005