Mailman 3 September 2015 - Twisted

[Twisted-Python] Converting str to bytes in Py3 port
by Adi Roiban 08 Sep '15

08 Sep '15

Hi, While reviewing the latest patch related to porting Twisted to py3 I saw that many values which were supposed to hold just text were ported as bytes. The argument for this conversion was that Twisted is a low level framework and that other high level framworks like Treq or Klein should implement the required code so that end user can just use text. For example the HTTP response messages are not bytes, even if the RFC specified that they should only contain text with a single encoding. I have little experience with twisted.web, so maybe there are many users of twisted.web which use binary data for response messages or maybe there is a good use case for putting random bytes in the HTTP response message. ------- If for twisted.web there are Treq or Klein to implement the user friendly interfaces, I don't know what can be used for twisted.conch In the ticket for porting twisted.conch.ssh.key to py3 [1] the name of the ssh key algorithms like 'ssh-rsa' or 'ssh-dsa', encryption algorithm names like AES-128-CBC and ssh key components like p, q, y, x, n, e are now all bytes. Do you think that this is ok? Why allow or encourage people to use random bytes for fields which should contain human readable text? For HTTP response line and response headers I think that all values should be text and encoded in ISO-8859-1. RFC 4819 [2] only talks about using US-ASCII for all names used in the SSH public key subsystem. Why use bytes to represent these names? RFC 4716 specifies that header tags must be US-ASCII while header value UTF-8 ... while all IANA names are US-ASCII.... and names in the private namespace (name@domain) should also be US-ASCII. As a reviewer I don't know that is the degin/architecture choose by Twisted and how to review such changes. As a developer I prefer to have as much text as possible so that I can do text manipulation operation on these values and directly include them in logs or error messages. I assume that all the people involved in writing the RFC had a good reason to require those fields to be text rather than any bytes. Thanks for your feedback! [1] https://github.com/twisted/twisted/compare/trunk...conch-ssh-keys-py3-7998 [2] https://www.ietf.org/rfc/rfc4819.txt -- Adi Roiban

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[Twisted-Python] Exception's Implicit Public API, and Python 3
by Amber "Hawkie" Brown 08 Sep '15

08 Sep '15

We just ran into an issue in Autobahn|Python where a log message that tried to use the message attribute an Exception subclass (twisted.internet.error.ProcessTerminated). The message attribute was deprecated in Python 2.6, and removed in Python 3 -- but it still "works" in Python 2.7. So, this needs the question: Is this breaking Twisted's backwards compat (that .message isn't there on Python 3)? Should we go through and look at our exception subclasses, and look at what makes sense to have a .message attribute (for example, I'd say it makes sense on ProcessTerminated) and then add it? Or is it just a 2/3 change that should be expected during porting? It seems like an interesting edge case (and another example of "Don't use subclassing, kids" ;) ). The Autobahn ticket (which we're fixing as I write this email) is here https://github.com/tavendo/AutobahnPython/issues/479 . Regards, Amber "Hawkie" Brown GPG: https://keybase.io/hawkowl hawkowl(a)atleastfornow.net

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[Twisted-Python] Auto-Re: error on log module (twisted python 3)
by wangliyu＠dhcc.com.cn 08 Sep '15

08 Sep '15

您的邮件已收到，我会尽快处理，谢谢！ ---- -------------------------- Best Regards, 王立宇 -------------------------- DHC Software Co.,Ltd. 东华软件股份公司 Add：11th floor,DHC Office Building,ZiJin Digital Park ,Zhongguancun,Haidian District, BeiJing ,China 北京市海淀区中关村紫金数码园3号楼东华合创大厦11层邮编 100190 手机：18612695237

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[Twisted-Python] HAProxy and twisted TCP/IP support
by Zuhaib Siddique 08 Sep '15

08 Sep '15

Hey all, I am looking at using HAProxy in front of Twisted for TCP connection and need to pass the source IP along. We are currently looking at hacking tcp.py to add support for this: http://www.haproxy.org/download/1.5/doc/proxy-protocol.txt but wondering if this is something someone is already working on for twisted or maybe I dont need to hack tcp.py. Thanks Zuhaib

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[Twisted-Python] Crossbar.io 0.11.0
by Tobias Oberstein 07 Sep '15

07 Sep '15

Hi all, I am pleased to announce Crossbar.io 0.11.0 https://github.com/crossbario/crossbar#crossbario https://pypi.python.org/pypi/crossbar/0.11.0 Crossbar.io is an open-source WAMP application router that allows to build advanced applications from loosely-coupled components that can talk in real-time with each other. This is a big release: - Python 3 support! Yes, that's right. Crossbar.io now runs on Py3. - Node, worker and component start/stop/failure behavior improved a lot - new File Upload Service - new Web Hook Service - Complete new logging system (structured logging + color!) - Improved both Crossbar's own logging, and logging from user components - Lots of issues and corner-cases fixed - Automated testing / CI on 8 platform combinations - Much improved unit test coverage A big chunk of the credits for this go to Crossbar.io core devs Amber "hawkie" / http://atleastfornow.net/ Mike "meejah" / https://meejah.ca/ Both are working on CB under Tavendo contract. This release simply wouldn't be as awesome as it is without them! Period. hawkie and meejah are experienced, creative, precise and just cool Python devs, can't say how happy we are to work with them;) Then the "File Upload Service" was contributed by Marko (Record Evolution) https://www.record-evolution.com/ Record Evolution is using Crossbar.io and Autobahn throughout their RE.base and RE.porter products. Happy users make new contributors! You can find the docs for the new user visible features here: http://crossbar.io/docs/File-Upload-Service/ http://crossbar.io/docs/HTTP-Bridge-Services-Webhook/ http://crossbar.io/docs/Logging-in-Crossbar.io/ http://crossbar.io/docs/Configuring-Crossbar.io's-Logging/ Ah, speaking of docs. Yeah, needs to improve, we know. And it's coming! We have a complete new launch of the Crossbar.io Web site including docs in the cooking. Stay tuned! Cheers, /Tobias

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[Twisted-Python] Auto-Re: Weekly Bug Summary
by wangliyu＠dhcc.com.cn 06 Sep '15

06 Sep '15

您的邮件已收到，我会尽快处理，谢谢！ ---- -------------------------- Best Regards, 王立宇 -------------------------- DHC Software Co.,Ltd. 东华软件股份公司 Add：11th floor,DHC Office Building,ZiJin Digital Park ,Zhongguancun,Haidian District, BeiJing ,China 北京市海淀区中关村紫金数码园3号楼东华合创大厦11层邮编 100190 手机：18612695237

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[Twisted-Python] Weekly Bug Summary
by trac＠twistedmatrix.com 06 Sep '15

06 Sep '15

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[Twisted-Python] npyscreen Twisted Reactor
by Mark Tearle 05 Sep '15

05 Sep '15

Hi folks A quick email to alert folks to an updated version of the Twisted Reactor that I wrote for use with npyscreen. Npyscreen is a python widget library and application framework for programming terminal or console applications. It is built on top of ncurses, which is part of the standard library. It is written by Nicholas Cole. (See https://bitbucket.org/npcole/npyscreen) Current version includes: Bug fixes (Thanks to Adam Pokora) Example Server Example Client (NEW) The reactor and examples can be found at: https://github.com/mtearle/twisted-reactor-npyscreen Patches, bug reports, etc welcome... Mark -- Mark Tearle <mark(a)tearle.com> Everyone thinks of changing the world, but no one thinks of changing himself. - Tolstoy -- Mark Tearle <mark(a)tearle.com> Everyone thinks of changing the world, but no one thinks of changing himself. - Tolstoy

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[Twisted-Python] Auto-Re: Exception's Implicit Public API, and Python 3
by wangliyu＠dhcc.com.cn 05 Sep '15

05 Sep '15

您的邮件已收到，我会尽快处理，谢谢！ ---- -------------------------- Best Regards, 王立宇 -------------------------- DHC Software Co.,Ltd. 东华软件股份公司 Add：11th floor,DHC Office Building,ZiJin Digital Park ,Zhongguancun,Haidian District, BeiJing ,China 北京市海淀区中关村紫金数码园3号楼东华合创大厦11层邮编 100190 手机：18612695237

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[Twisted-Python] Twisted 15.4.0 Release Announcement
by Amber "Hawkie" Brown 05 Sep '15

05 Sep '15

On behalf of Twisted Matrix Laboratories, I am honoured to announce the release of Twisted 15.4, codenamed "Trial By Fire". Twisted is continuing to forge ahead, with the highlights of this release being: - twisted.positioning, the rest of twisted.internet.endpoints, KQueueReactor (for real this time), and twisted.web.proxy/guard have all been ported to Python 3. - Trial has been ported to Python 3! This was made possible by a Python Software Foundation grant. - Twisted officially supports several more platforms: Py3.4 on FreeBSD, Py2.7/Py3.4 on Fedora 21/22, and Py2.7 on RHEL7. - Python 2.6 is no longer supported, and support for Debian 6, and RHEL6 has been removed because of this. - Support for the EOL'd platforms of Fedora 17/18/19 has been removed. - Twisted has moved to requiring setuptools for installation. - twisted.python.failure.Failure's __repr__ now includes the exception message. - 19 tickets in total closed! You can find the downloads at https://pypi.python.org/pypi/Twisted (or alternatively http://twistedmatrix.com/trac/wiki/Downloads). The NEWS file can be found at https://github.com/twisted/twisted/blob/trunk/NEWS . Many thanks to everyone who had a part in this release - the supporters of the Twisted Software Foundation, the developers who contributed code as well as documentation, and all the people building great things with Twisted! Amber "Hawkie" Brown GPG: https://keybase.io/hawkowl hawkowl(a)atleastfornow.net

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