Mailman 3 April 2014 - Twisted

[Twisted-Python] Weekly Bug Summary
by trac＠twistedmatrix.com 20 Apr '14

20 Apr '14

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[Twisted-Python] Create a NAT rule from twsited
by Grigorescu Ciprian 16 Apr '14

16 Apr '14

Hello, Is there a way to create a NAT rule from twisted? I need to route a private ip to a public ip from a twisted script. Thank You, Ciprian

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[Twisted-Python] Manhole but no SSH
by Nicholas 15 Apr '14

15 Apr '14

Hello, everyone. Is it possible to implement the Manhole but without using SSH (or telnet, for that matter) ? Say I start a service and I want to be thrown straight in a console, much like Manhole does with SSH, but without having to actually listen on a port and having to connect to it with an user and password. Thanks.

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[Twisted-Python] ANN: Crochet 1.2.0 - Use Twisted Anywhere!
by Itamar Turner-Trauring 14 Apr '14

14 Apr '14

Crochet is an MIT-licensed library that makes it easier to use Twisted from regular blocking code. Some use cases include: * Easily use Twisted from a blocking framework like Django or Flask. * Write a library that provides a blocking API, but uses Twisted for its implementation. * Port blocking code to Twisted more easily, by keeping a backwards compatibility layer. * Allow normal Twisted programs that use threads to interact with Twisted more cleanly from their threaded parts. For example this can be useful when using Twisted as a WSGI container. New in this release: * crochet.wait_for implements the timeout/cancellation pattern documented in previous versions of Crochet. * Functions wrapped with wait_for and run_in_reactor can now be accessed via the wrapped_function attribute, to ease unit testing of the underlying Twisted code. * Bug fixes, documentation improvements and more - for a full list see the Documentation can be found at http://crochet.readthedocs.org [1] Bugs and feature requests should be filed at the project https://github.com/itamarst/crochet [2] Here's an example of a program using Crochet. Notice that you get a completely blocking interface to Twisted and do not need to run the Twisted reactor, the event loop, yourself. #!/usr/bin/python """ Do a DNS lookup using Twisted's APIs. """ from __future__ import print_function # The Twisted code we'll be using: from twisted.names import client from crochet import setup, wait_for setup() # Crochet layer, wrapping Twisted's DNS library in a blocking call. @wait_for(timeout=5.0) def gethostbyname(name): """Lookup the IP of a given hostname. Unlike socket.gethostbyname() which can take an arbitrary amount of time to finish, this function will raise crochet.TimeoutError if more than 5 seconds elapse without an answer being received. """ d = client.lookupAddress(name) d.addCallback(lambda result: result[0][0].payload.dottedQuad()) return d if __name__ == '__main__': # Application code using the public API - notice it works in a normal # blocking manner, with no event loop visible: import sys name = sys.argv[1] ip = gethostbyname(name) print(name, "->", ip) Run on the command line: > $ python blockingdns.py twistedmatrix.com > twistedmatrix.com -> 66.35.39.66 Links: ------ [1] https://crochet.readthedocs.org/ [2] https://github.com/itamarst/crochet

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[Twisted-Python] Weekly Bug Summary
by trac＠twistedmatrix.com 13 Apr '14

13 Apr '14

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[Twisted-Python] Twisted at PyCon 2014
by Itamar Turner-Trauring 12 Apr '14

12 Apr '14

PyCon is upon us; here's some of the Twisted-related talks and events this year (I may be missing a few, and this year I'm only mentioning stuff that will specifically mentions Twisted): Tutorials Aurynn Shaw will be teaching a Twisted tutorial today - https://us.pycon.org/2014/schedule/presentation/58/ Talks Ashwini Oruganti will be talking about how she implemented the happy eyeballs algorithm (really! aka RFC 6555) - https://us.pycon.org/2014/schedule/presentation/156/ Stacey Sern will present an introduction to Twisted - https://us.pycon.org/2014/schedule/presentation/189/ Laurens van Houtven will be talking about ways to use Twisted from other frameworks and concurrency models - https://us.pycon.org/2014/schedule/presentation/138/ Hynek Schlawack will tell you that SSL in Twisted has some issues (but getting better literally by the day) - https://us.pycon.org/2014/schedule/presentation/144/ Narahari Allamraju will be reviewing different options for messaging layers, from low-level systems like Twisted to high-level systems like RabbitMQ - https://us.pycon.org/2014/schedule/presentation/282/ Other We'll be sprinting after the conference, please join in!

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[Twisted-Python] Twisted 14.0.0-pre2 Announcement
by HawkOwl 11 Apr '14

11 Apr '14

Just in time for PyCon, the second prerelease is hot off the presses. Tarballs for this prerelease can be found at <http://twistedmatrix.com/Releases/pre/14.0.0pre2>, with the changelog at <http://twistedmatrix.com/Releases/pre/14.0.0pre2/NEWS.txt>. Changes from the previous prerelease include: - Dropping support for Windows XP, due to XP being EOL. - Dropping support for PyOpenSSL older than 0.10. - Support for TLS Service Identity, in conjunction with the service_identity library on PyPI. For more information and a full list of changes, check the NEWS.txt file. Please download the tarballs and test them with your applications, so we can make sure we’re all ready for release! -hawkowl

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[Twisted-Python] which async framework?
by Chris Withers 10 Apr '14

10 Apr '14

Hi All, Apologies for the cross-post, but this is a "which framework" question so seemed the most constructive way. Not interested in religious debates, just trying to pick the best tool for the job and didn't get much of a useful response from python-list... So, I see python now has a plethora of async frameworks and I need to try and pick one to use from: - asyncio/tulip - tornado - twisted From my side, I'm looking to experimentally build a network testing tool that will need to speak a fair few protocols, both classic tcp and multicast-based, and have a web api living on top of it that most likely will have a websocket for pumping data to the browser. It'll also need to write out JUnit-compatible xml results, but that's like the easiest bit ;-) I'd like to be able to serve the rest of the web api using a pyramid wsgi app if possible, and I'd like to be able to write the things that process requests in and validation out in a synchronous fashion, most likely spinning off a thread for each one. The protocols are all financial (do we really not have a pure-python FIX library?!) but none are likely to have existing python implementations. How should I pick between the options? What would people recommend and why? cheers, Chris -- Simplistix - Content Management, Batch Processing & Python Consulting - http://www.simplistix.co.uk

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[Twisted-Python] XMLString clarification
by Kevin Mcintyre 09 Apr '14

09 Apr '14

I'm still having trouble getting my multipart text/html from an email into XMLString. I run the html through beautifulsoup then remove the doctype, but if there's anything at all off about the resulting xml it still craps out. Is there anyway to stick an arbitrary string into a template? Or should I add a callback to flatten and add the placeholder in the flatten stage and replace the placeholder with the actually html. Any guidance appreciated, Kevin

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[Twisted-Python] Security Advisory: OpenSSL 1.0.1g
by Alex Gaynor 08 Apr '14

08 Apr '14

Today a `security release of OpenSSL`_ was issued, fixing a critical vulnerability. This vulnerability allows a malicious client or server to read up to 64KB of memory out of the remote machine, potentially compromising any secrets within the process, including things like TLS private certificates. This issue does not affect Twisted directly, but will affect many users of Twisted. Any machine which is serving traffic over TLS, or which is making outgoing TLS connections should upgrade it's version of OpenSSL immediately. This issue has been assigned CVE-2014-0160. A `complete description of the bug is also available`_. New packages have been issued for the following operating systems: * `Debian`_ * `Ubuntu`_ .. _`security release of OpenSSL`: https://www.openssl.org/news/secadv_20140407.txt .. _`complete description of the bug is also available`: http://heartbleed.com .. _`Debian`: https://www.debian.org/security/2014/dsa-2896 .. _`Ubuntu`: http://www.ubuntu.com/usn/usn-2165-1/

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