Mailman 3 October 2005 - Twisted

[Twisted-Python] The Twisted Sprint is On
by Christopher Armstrong 08 Oct '05

08 Oct '05

We're all in #twisted hacking away at Twisted to improve Trial, the release, documentation, and so forth. We'll be going all weekend, so please stop by #twisted on irc.freenode.net if you want to get involved or just gape in horror at the chaotic development process. The most popular times to be on will be Australian-EST prime time, US-EST prime time, and especially the collissions between them. -- Twisted | Christopher Armstrong: International Man of Twistery Radix | -- http://radix.twistedmatrix.com | Release Manager, Twisted Project \\\V/// | -- http://twistedmatrix.com |o O| | w----v----w-+

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Re: [Twisted-Python] How to emulate Python's getoutput function
by Drake Smith 08 Oct '05

08 Oct '05

At 02:40 PM 10/8/2005 +1100, you wrote: >On 10/8/05, Drake Smith <drakesmith(a)adelphia.net> wrote: > > Is there a relatively simple way to emulate the following python function: > > commands.getoutput ('ifconfig eth0 | grep inet')) > > > > I can get halfway there with: > > utils.getProcessOutput ('/sbin/ifconfig', ['eth0']) > > but the trick to piping that output to another command such as grep is > > eluding me. Thank you. > >make the command "sh", and the arguments ['-c', 'shell string']. Of >course, this means you're opening yourself up to shell insertion >attacks if you put any user-input into that shell string. > > >-- > Twisted | Christopher Armstrong: International Man of Twistery > Radix | -- http://radix.twistedmatrix.com > | Release Manager, Twisted Project > \\\V/// | -- http://twistedmatrix.com > |o O| | >w----v----w-+ > > >From: Jp Calderone <exarkun(a)divmod.com> > >For the particular case of grep, this is pretty straightfoward: > def gotOutput(output): > lines = output.splitlines() > for L in lines: > if 'inet' in L: > yield L > utils.getProcessOutput(...).addCallback(gotOutput).addCallback(something) > >For the general case of chaining processes, you need to get down to >reactor.spawnProcess(). This API lets you specify which file descriptors >are connected to what. A pipe ends up being just that - use os.pipe() to >create one, hand one end to the stdout of one process and the other end to >the stdin of another, and now they're talking :) > >Hope this helps, > >Jp Thank you Christopher and JP for your answers. They both work like a charm and I can use both techniques in my current project.

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[Twisted-Python] How to emulate Python's getoutput function
by Drake Smith 08 Oct '05

08 Oct '05

Is there a relatively simple way to emulate the following python function: commands.getoutput ('ifconfig eth0 | grep inet')) I can get halfway there with: utils.getProcessOutput ('/sbin/ifconfig', ['eth0']) but the trick to piping that output to another command such as grep is eluding me. Thank you.

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RE: [Twisted-Python] Conch SSH client howto
by Henning.Ramm＠mediapro-gmbh.de 07 Oct '05

07 Oct '05

> connectionSecure is called once, then getPublicKey 7 times, after that nothing happens in eternity. > The pubKey seems to be ok, otherwise I got a BadKeyError. Sorry for bothering you - after I hooked up twisted logging, I know what's going on: [INFO] Starting factory <twisted.internet.protocol.ClientFactory instance at 0x015587D8> [INFO] Enabling Multithreading. [INFO] starting waker [INFO] kex alg, key alg: diffie-hellman-group-exchange-sha1 ssh-rsa [INFO] client->server: aes256-ctr hmac-sha1 none [INFO] server->client: aes256-ctr hmac-sha1 none [INFO] Transport verifyHostKey: ac:ff:b7:bd:90:a4:98:f0:42:eb:07:16:c0:9a:6e:f8 [INFO] Transport connectionSecure [INFO] starting service ssh-userauth [INFO] can continue with: ['publickey', 'password', 'keyboard-interactive'] [INFO] trying to auth with publickey [INFO] AuthClient getPublicKey [INFO] using key of type ssh-rsa (last 4 lines repeated 7 times) [ERROR] Got remote error, code 2 reason: Too many authentication failures for ppi [INFO] connection lost [INFO] Stopping factory <twisted.internet.protocol.ClientFactory instance at 0x015587D8> I still have no idea why key auth doesn't work and how to enable password auth, but I will find out. (That would be easier if conch.ssh had proper API docs, though.) Best regards, Henning Hraban Ramm Südkurier Medienhaus / MediaPro Support/Admin/Development Dept.

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[Twisted-Python] threadedwin32eventreactor.py
by Toby Dickenson 07 Oct '05

07 Oct '05

I am looking to combine the foreign event loop joy of threadedselectreactor, with the WaitForMultipleObject joy of win32eventreactor. Has anyone else looked at this combination? -- Toby Dickenson

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[Twisted-Python] Conch SSH client howto
by Henning.Ramm＠mediapro-gmbh.de 07 Oct '05

07 Oct '05

Ahoi! Is the conch ssh client howto example (see below) supposed to work? http://twistedmatrix.com/projects/conch/documentation/howto/conch_client.ht… I only changed the user, keys and server information and added some print statements. If verifyHostKey fails, I get no error message (looks like it should raise a ConchError), the script only stays quiet. If that works, connectionSecure is called once, then getPublicKey 7 times, after that nothing happens in eternity. The pubKey seems to be ok, otherwise I got a BadKeyError. Any hints? Best regards, Henning Hraban Ramm Südkurier Medienhaus / MediaPro Support/Admin/Development Dept.

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[Twisted-Python] DHCP client implementation using twisted
by Gaspard, Bradley S 07 Oct '05

07 Oct '05

Hello, I've browsed the documentation and mailing list and did a Google search but could find nothing useful. I'm wondering if anyone could point me to a DHCP client implementation. In lieu of that, any thoughts on how difficult it would be write a DHCP client for a Twisted newbie? Any guidance would be appreciated. Brad

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[Twisted-Python] twisted.trial : running tests : example requested
by Todd Greenwood 06 Oct '05

06 Oct '05

1. I saw an email thread that stated that the twisted.trial.doctest feature is going away, is this true? If not, could I get a simple example? 2. I am working thru the docs at: http://twistedmatrix.com/projects/core/documentation/howto/policy/test-stan… and the section 'Running the Tests' doesn't make sense to me: """ Running the Tests How $ Twisted/admin/runtests """ 2.a I don't have either the Twisted directory or the Twisted/admin/runtests. Is this the current way to run tests? 2.b I have looked for the 'runtests' after installing via debian's apt-get (below) and building off the latest svn source: $ svn info Path: . URL: svn://svn.twistedmatrix.com/svn/Twisted/trunk Repository UUID: bbbe8e31-12d6-0310-92fd-ac37d47ddeeb $ dpkg -l | grep wist | sed -e 's/-8.*$/-8/g' -e 's/ii//g' python-twisted 1.3.0-8 python-twisted-conch 1.3.0-8 python2.2-twisted 1.3.0-8 python2.2-twisted-bin 1.3.0-8 python2.2-twisted-conch 1.3.0-8 python2.3-twisted 1.3.0-8 python2.3-twisted-bin 1.3.0-8 python2.3-twisted-conch 1.3.0-8 twisted-doc 1.3.0-8 twisted-doc-api 1.3.0-8 twisted-quotes 1.3.0-8 -Todd -- Todd Greenwood-Geer tgreenwoodgeer(a)yahoo.com ________________________________________________________________________________ BEAWorld 2005: coming to a city near you. Everything you need for SOA and enterprise infrastructure success. Register now at http://www.bea.com/4beaworld London 11-12 Oct| Paris13-14 Oct| Prague18-19 Oct |Tokyo 25-26 Oct| Beijing 7-8 Dec

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[Twisted-Python] Re: [Twisted-commits] r14597 - try enabling SO_REUSEADDR on windows
by Andrew Bennetts 06 Oct '05

06 Oct '05

On Thu, Sep 29, 2005 at 07:17:59AM -0600, Itamar Shtull-Trauring wrote: > Author: itamarst > Date: Thu Sep 29 07:17:59 2005 > New Revision: 14597 > > Modified: > trunk/twisted/internet/tcp.py > Log: > try enabling SO_REUSEADDR on windows This appears to have broken twisted.test.test_tcp.CannotBindTestCase.testCannotBind on windows. Excerpt from <http://twistedmatrix.com/buildbot/win32/builds/719/default/2>: =============================================================================== [FAIL]: twisted.test.test_tcp.CannotBindTestCase.testCannotBind File "c:\buildslave\w32\W32-full2.2\Twisted\twisted\internet\defer.py", line 109, in maybeDeferred result = f(*args, **kw) File "c:\buildslave\w32\W32-full2.2\Twisted\twisted\test\test_tcp.py", line 451, in testCannotBind reactor.listenTCP, n, f, interface='127.0.0.1') File "c:\buildslave\w32\W32-full2.2\Twisted\twisted\trial\unittest.py", line 115, in failUnlessRaises raise FailTest('%s not raised (%r returned)' twisted.trial.unittest.FailTest: CannotListenError not raised (<<class 'twisted.internet.tcp.Port'> of twisted.test.test_tcp.MyServerFactory on 4967> returned) =============================================================================== -Andrew.

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[Twisted-Python] Re: flow example doesn't appear to be 'flowing' (James Y Knight)
by Todd Greenwood 05 Oct '05

05 Oct '05

>> Try with two browsers, not two tabs in one browser. Due to the way >> the browser implements connection-caching and http keepalive, >> sometimes it will not send a second request to the server until the >> first one has completely downloaded. >> >> James James - thanks! Apparently 'File > New Window' wasn't enough with firefox. I had to open a different browser (Konqueror) in order to see the expected multi-page rendering in action. All is working as expected now. REPRO: - open http://localhost:8081/ in browser #1 (Firefox) - open http://localhost:8081/ in browser #2 (Konqueror) - >> Both pages render random numbers simultaneously, as expected. -Todd -- Todd Greenwood-Geer tgreenwoodgeer(a)yahoo.com ________________________________________________________________________________ BEAWorld 2005: coming to a city near you. Everything you need for SOA and enterprise infrastructure success. Register now at http://www.bea.com/4beaworld London 11-12 Oct| Paris13-14 Oct| Prague18-19 Oct |Tokyo 25-26 Oct| Beijing 7-8 Dec

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