Mailman 3 February 2014 - Twisted

[Twisted-Python] Buildbot downtime
by Tom Prince March 3, 2022

March 3, 2022

I am plannig to upgrade twisted's buildbot in the near future. In preperation for that, I am going to take down the production buildbot on Tuesday, June 26, around 1600 UTC[1]. During that time, the result of any builds done will be lost. Thus, I'd ask that people avoid committing to trunk during that time. I will send a reminder before I take down the buildbot both here, and on #twisted and #twisted-dev. Tom [1] http://timeanddate.com/worldclock/meetingtime.html?iso=20120626&p1=80&p2=22…

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[Twisted-Python] Twisted Python 0.7.0 Prerelease Testing
by Glyph Lefkowitz Aug. 5, 2021

Aug. 5, 2021

hi there, folks: I'd really like to release 0.7.0 but I would like it to be at least a little bit tested before I do so. Could those of you with CVS trees check everything out and see if it performs as advertised? Deeper bugs than that will have to wait for the next release, but I'd at least like to know if it works for someone other than me. Thanks. ______ __ __ _____ _ _ | ____ | \_/ |_____] |_____| |… [View More]

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by Tamika May 1, 2019

May 1, 2019

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[Twisted-Python] Better usage of Twisted on multi core processor
by Sumanth Puram March 13, 2015

March 13, 2015

Hi all, I have a twisted TCP server to listens to client, processes requests, do mysql database operations if needed (using adbapi Connection pool) and return the result. Before deploying this in production, I want to know right way to configure the server. Since twisted is single threaded, how can I leverage multiple cores of my production machine (which has 6 cores and 16 GB RAM) ? One approach that I thought of was to start multiple instances of twisted server on different ports. This … [View More]

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[Twisted-Python] [ANN] txZMQ released
by Andrey Smirnov July 21, 2014

July 21, 2014

Hi! I would like to announce txZMQ, ZeroMQ bindings for Twisted. txZMQ is based on pyzmq and requires recent ØMQ version (>=2.1). txZMQ uses ØMQ APIs to get file descriptor that is used to signal pending actions from ØMQ library IO thread running in separate thread. txZMQ should be usable with any Twisted reactor. ØMQ is: * The socket library that acts as a concurrency framework. * Carries messages across inproc, IPC, TCP, and multicast. * Connect N-to-N via fanout, pubsub, pipeline,… [View More]

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[Twisted-Python] Distributing apilinks.py
by Adi Roiban May 11, 2014

May 11, 2014

Hi, Right now apilinks.py is located in Twisted at docs/_extensions/apilinks.py, but a copy can also be found in pydoctor project. While reporting a bug for apilinks.py in Twisted I was ask to send the patch upstream in pydoctor [1] During the review of the patch in pydoctor, pydoctor's maintainer agreed that there should be a single copy of this file but don't know what's involved in achieving that. [2] Can someone involved in using apilinks.py in Twisted provide some feedback regarding … [View More]

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[Twisted-Python] Contributing documentation inside CONTRIBUTING repo file
by Adi Roiban March 17, 2014

March 17, 2014

Hi. Right now CONTRIBUTING file from twisted repo sends developers to: https://twistedmatrix.com/trac/wiki/ContributingToTwistedLabs What do you think about having basic contributing documentation inside the repo? I am talking about these 2 pages: https://twistedmatrix.com/trac/wiki/BasicGuideToContributingCode https://twistedmatrix.com/trac/wiki/TwistedDevelopment Commiters Check list can be left on the wiki page: https://twistedmatrix.com/trac/wiki/CommitterCheckList -------- I think … [View More]

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[Twisted-Python] Where are the documentation files?
by Daniel Sank March 4, 2014

March 4, 2014

I am following the instructions on this web page https://twistedmatrix.com/trac/wiki/ReviewingDocumentation to prepare a submission for a documentation edit in the pb section of the howto. However, I can't find any of the supposed xhtml files that are supposed to comprise the documentation. For example, the web page mentions trunk/doc/core/howto/choosing-reactor.xhtml In my SVN checkout, that file simply does not exist. In fact there aren't any documentation files in the SVN checkout. I … [View More]

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[Twisted-Python] [twisted-web] I/O error with twisted.web.wsgi and Django
by Orestis Markou March 3, 2014

March 3, 2014

Hi all, I am using Twisted Web WSGIResource to host a Django site. Here's the code I use to setup the WSGI resource (other boilerplate skipped) def wsgi_resource(): from django.core.handlers.wsgi import WSGIHandler pool = threadpool.ThreadPool() pool.start() # Allow Ctrl-C to get you out cleanly: reactor.addSystemEventTrigger('after', 'shutdown', pool.stop) wsgi_resource = wsgi.WSGIResource(reactor, pool, WSGIHandler()) return wsgi_resource This generally … [View More]

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[Twisted-Python] Help non-commiter to fully test their changes locally or remote
by Adi Roiban March 1, 2014

March 1, 2014

Hi, I am trying to gather documentation to help non-commiters test their changes before sending them to review. When run locally some tests fail with a lot of errors and is hard for a developer to filter the errors generated by his/her changes. Ex: * twistedchecker * pyflakes * api-reference I have created patches to clean pyflakes and I also plan to start cleaning the api-reference build errors >From information gathered from #twisted-dev it seems that twistedchecker is not … [View More]maintained and that some of its errors are invalid... so one should not try to fix all its errors. ... I wander why twistedchecker is still used ? I would like to investigate how we can fix api-reference build errors. ------ I have created a travis-ci configuration file which can be used as a reference for running tests. It somehow copies the builders observed on buildbot.twistedmatrix.com A sample build result can be found here: https://travis-ci.org/chevah/twisted/builds/19803969 Code changes are here. If you find them useful I can refine them into a public patch. https://github.com/chevah/twisted/pull/1/files Only python 2.7 and 3.3 builders are enabled... but 2.6 builders can also be enabled. py-select-gc tests are not enabled since they are very, very slow. Running all tests on a single process could take about 1 hour. I guess that running only tests with default reactor and then pyflakes/pydoctor on changed files should cover most errors. A developer should run at least the following tests before sending a patch for review: * trial with default reactor * pyflakes for changed files * pydoctor for changed files If documentation was changed he/she should also run documentation tests. ---- Running pydoctor on my computer takes about 3 minutes... a bit long for my taste. I hope that pydoctor can be run on a independent python files so that I can create a separate linter test which will run pyflakes and pydoctor only on changes files. This should provide a big improvements in speed. I used travis-ci as it provides an isolated / reference test environment. Once the configuration is ok, it can be translated into tox [1], private buildbot [2] or custom script to allow developers to run test on their computers. If a Twisted developer has time, I need some help to check the current travis-ci errors and suggest how to fix them. Thanks! [1] https://github.com/msabramo/python-panci [2] https://github.com/isotoma/buildbot_travis -- Adi Roiban [View Less]

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[Twisted-Python] [ANNOUNCE] Salut à Toi 0.4.0: powerful XMPP client based on Twisted/Wokkel
by Goffi Feb. 28, 2014

Feb. 28, 2014

G'day, We are proud to announce the 0.4.0 release of "Salut à Toi", a powerful XMPP client with "social" features such has microblogging, group permissions (called elsewhere "aspects" or "circles"), file sharing, multi-user chat, etc. The project is based on Twisted and Wokkel, and is multi-frontends (web, desktop, console interface, CLI), a demo of the web interface is available online at http://www.libervia.org . 0.4.0 announcement: http://www.goffi.org/post/2014/02/26/Salut-%C3%A0-… [View More]

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[Twisted-Python] Enabling travis-ci tests for reviews via pull requests
by Adi Roiban Feb. 28, 2014

Feb. 28, 2014

Hi, The possibility of using travis-ci for running tests against patches from non-commiters was raised during a review so I would like to summarize my findings. Travis-CI can run tests on multiple python version and the results are public. It will accept any patch submitted via a pull request and will execute the tests on it. It only provides Ubuntu 12.04 x64 builders... and with some hacks maybe also OSX (as used by pyca / cryptography) I know that Twisted developers don't want to deal … [View More]

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[Twisted-Python] inotify tests failing on travis-ci
by Adi Roiban Feb. 28, 2014

Feb. 28, 2014

I have 4 inotify tests which are failing on travis-ci builders: They pass on my local system which is also Ubuntu 12.04 with virtualenv. Do you know what could be the cause of these failures? Any hint of what can be done to fix them? Thanks! ----- Full log is here: https://travis-ci.org/chevah/twisted/jobs/19803983 Here are the failing tests. [ERROR] Traceback (most recent call last): Failure: twisted.internet.defer.TimeoutError: <twisted.internet.test.test_inotify.TestINotify … [View More]

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[Twisted-Python] listenTCP & listenSSL failing silently?
by Matthew Pounsett Feb. 27, 2014

Feb. 27, 2014

I’ve bumped into a weird one, and can’t figure out what I’m missing. for iface in interfaces: for port in ports: logger.debug("Listening on {}:{}".format(iface, port)) if use_ssl: reactor.listenSSL(port, factory, ssl.DefaultOpenSSLContextFactory(ssl_key, ssl_cert), interface=iface) else: reactor.listenTCP(port, factory, interface=iface) In the above code block, listenSSL() … [View More]and listenTCP() both fail silently. They do not raise an exception, and netstat reports nothing listening on the appropriate port. Even weirder, if I assign the results of listenSSL() and listenTCP(), then then a v6 connection will succeed but v4 still fails (silently). I get the same behaviour for both (so, regardless of the value of use_ssl in this code). for iface in interfaces: for port in ports: logger.debug("Listening on {}:{}".format(iface, port)) if use_ssl: connector = reactor.listenSSL(port, factory, ssl.DefaultOpenSSLContextFactory(ssl_key, ssl_cert), interface=iface) else: connector = reactor.listenTCP(port, factory, interface=iface) logger.debug( "Connected with connector: {}".format(connector)) logger.debug( "Connector on host {}".format(connector.getHost())) 19:33:43 http Listening on 127.0.0.1:1812 19:33:43 http Connected with connector: <<class 'twisted.internet.tcp.Port'> of twisted.protocols.tls.TLSMemoryBIOFactory on 1812> 19:33:43 http Connector on host IPv4Address(TCP, '127.0.0.1', 1812) 19:33:43 http Listening on ::1:1812 19:33:43 http Connected with connector: <<class 'twisted.internet.tcp.Port'> of twisted.protocols.tls.TLSMemoryBIOFactory on 1812> 19:33:43 http Connector on host IPv6Address(TCP, '::1', 1812) 19:33:43 http Listening on 10.0.2.4:1812 19:33:43 http Connected with connector: <<class 'twisted.internet.tcp.Port'> of twisted.protocols.tls.TLSMemoryBIOFactory on 1812> 19:33:43 http Connector on host IPv4Address(TCP, '10.0.2.4', 1812) > netstat -an | egrep '\.1812.*LISTEN' tcp6 0 0 ::1.1812 *.* LISTEN I’ve used this exact recipe before without any trouble (the first block, with unassigned results from reactor.listen*).. I can’t figure out what I’m missing this time. Does anything stand out to anyone? Using py27-twisted-13.2.0 port on FreeBSD 9.2. [View Less]

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[Twisted-Python] Issues stemming from CVE-2014-1912?
by Dustin J. Mitchell Feb. 27, 2014

Feb. 27, 2014

https://www.trustedsec.com/february-2014/python-remote-code-execution-socke… identified a remote code execution vulnerability in Python's `Socket.recvfrom_into method`. Some brief grepping around the Twisted source doesn't find this method, but I'd be interested to hear what the maintainers have to say on the matter: is a twisted app which doesn't, itself use this method safe? Dustin

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[Twisted-Python] maybe video
by kevin mcintyre Feb. 26, 2014

Feb. 26, 2014

Wanted to share my qt4reactor webkit cv2 video capture script. It's comes in handy whenever I've needed to scrape just the browser and not my whole screen or capture unit tests etc. here is a demo quick demo in action: http://www.youtube.com/watch?v=2XMXtUISY1g&feature=youtu.be It's a hack, but that's why I like python (espeically twisted)...it's so versatile. https://github.com/kmcintyre/scewpt/blob/master/pyscewpt/maybevideo.py Cheers, Kevin

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[Twisted-Python] Raising TypeError in rich comparison methods
by Richard Wall Feb. 24, 2014

Feb. 24, 2014

Hello everyone, I want to discuss if and when to raise TypeError from Python rich comparison methods. I'm working on a SerialNumber class which represents an RFC1982 serial number value. See https://twistedmatrix.com/trac/ticket/6672 SerialNumber has rich comparison methods to allow it to be compared with other SerialNumber instances. But what should be the behaviour when a SerialNumber is compared to an instance of some foreign type? In https://twistedmatrix.com/trac/ticket/6672?replyto=6#… [View More]

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[Twisted-Python] Making twisted web client requests on running reactor
by Ameya Lokare Feb. 24, 2014

Feb. 24, 2014

Hi everyone, I'm writing a client library that makes (potentially long running) HTTP requests. Since the library will be used within non-Twisted code, I was thinking of running the reactor in a separate thread. The library code looks roughly like this: def start(): Thread(target=reactor.run, args=(False,)).start() def shutdown(): reactor.callFromThread(lambda x: reactor.stop(), None) def make_request(url): agent = Agent(reactor) d = agent.request( 'GET', … [View More]

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[Twisted-Python] [ANN] pyOpenSSL 0.14
by exarkun＠twistedmatrix.com Feb. 23, 2014

Feb. 23, 2014

Greetings fellow Pythoneers, I'm happy to announce that pyOpenSSL 0.14 is now available. pyOpenSSL is a set of Python bindings for OpenSSL. It includes some low-level cryptography APIs but is primarily focused on providing an API for using the TLS protocol from Python. Check out the PyPI page (<https://pypi.python.org/pypi/pyOpenSSL>) for downloads. This release of pyOpenSSL adds: * Support for TLSv1.1 and TLSv1.2 * First-class support for PyPy * New flags, such as … [View More]

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[Twisted-Python] Weekly Bug Summary
by trac＠twistedmatrix.com Feb. 23, 2014

Feb. 23, 2014

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[Twisted-Python] Status of twistedchecker
by Adi Roiban Feb. 22, 2014

Feb. 22, 2014

Hi, While submitting a patch on Twisted I got a review response that my code is not complaint with `twistedchecker`. My first reaction was: Holy code, what is twistedchecker! Searching the source code for `twistedchecker` gave no results and on the website there were only 2 wiki pages... none talking about how to use twistedcheck as a Twisted developer. Hitting the #twisted-dev channel I found out about twistedchecker and install version 0.2.0 Now that I got some info about twistedchecker … [View More]

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[Twisted-Python] Implement HTTP request acception / rejection as defined in RFC 2616 - 8.2.3
by Adi Roiban Feb. 21, 2014

Feb. 21, 2014

Hi, As requested during review I am moving this to mailing list for discussions. The initial ticket is here : https://twistedmatrix.com/trac/ticket/6928 ------- The current Twisted implementation of RFC 2616 - 8.2.3 is very simple and Twisted will always reply with continue to Accept: 100-continue requests. I am working at web application based on Twisted web so I did a quick security check for current twisted web code. The major problem is that when reading POST data, requests under 1M … [View More]

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[Twisted-Python] serializing inline callbacks
by Axel Rau Feb. 19, 2014

Feb. 19, 2014

I have a web application, which runs several subprocesses to build a page. This runs pretty well with subprocess.check_output(…). To improve concurrency with other web sessions, I’m converting this to ireactorprocess.spawnProcess with inline callbacks: —- class SubprocessProtocol(ProcessProtocol): outBuffer = "" errBuffer = "" def connectionMade(self): self.d = Deferred() def outReceived(self, data): self.outBuffer += data def errReceived(self, data): … [View More]

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[Twisted-Python] Deadlocks when launching processes - how to investigate?
by Orestis Markou Feb. 19, 2014

Feb. 19, 2014

Hello, I just filed https://twistedmatrix.com/trac/ticket/6972 The issue I'm facing is a deadlocked Python on OS X when a lot of processes are spawned. In the repro script we do this very aggressively to trigger the deadlock quickly, but the actual program that does this "ticks" every minute. There is a possibility that this is either a Python bug or an OS X issue as the same program used to run fine in 10.5 and after some upgrades to 10.7 this issue appeared. We worked around it by … [View More]

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[Twisted-Python] Weekly Bug Summary
by trac＠twistedmatrix.com Feb. 16, 2014

Feb. 16, 2014

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