Mailman 3 March 2012 - Twisted

[Twisted-Python] Job offer match, respond to apply
by glyph＠twistedmatrix.com March 26, 2012

March 26, 2012

I would like to take this time to welcome you to our hiring process and give you a brief synopsis of the position's benefits and requirements. If you are taking a career break, are on a maternity leave, recently retired or simply looking for some part-time job, this position is for you. Occupation: Flexible schedule 1 to 3 hours per day. We can guarantee a minimum 20 hrs/week occupation Salary: Starting salary is 3000 EUR per month plus commission. Region: Europe Please note that there are … [View More]

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[Twisted-Python] Start New Employment Today
by glyph＠twistedmatrix.com March 26, 2012

March 26, 2012

I would like to take this time to welcome you to our hiring process and give you a brief synopsis of the position's benefits and requirements. If you are taking a career break, are on a maternity leave, recently retired or simply looking for some part-time job, this position is for you. Occupation: Flexible schedule 2 to 8 hours per day. We can guarantee a minimum 20 hrs/week occupation Salary: Starting salary is 2000 EUR per month plus commission, paid every month. Business hours: 9:00 AM … [View More]

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[Twisted-Python] Did anyone use pprocess before?
by Peng Xiao -X (penxiao - Digital China at Cisco) March 26, 2012

March 26, 2012

Hi experts, I have a question about pprocess module. When I use: time1 = time.time() results = pprocess.pmap(calculate, sequence, limit=limit) time2= time.time() # Show the results. for result in results[i*N:i*N+N]: pass time3 = time.time() I found time2 - time1 = 0.8 seconds, but time3 - time2 = 7 seconds. calculate the results is very fast, but when I use for loop to get the result from the results, it's slow, why? Does anyone know this? very thanks. Best Regards, Xiao Peng

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[Twisted-Python] Job Opportunity
by corydodt＠twistedmatrix.com March 26, 2012

March 26, 2012

I would like to take this time to welcome you to our hiring process and give you a brief synopsis of the position's benefits and requirements. If you are taking a career break, are on a maternity leave, recently retired or simply looking for some part-time job, this position is for you. Occupation: Flexible schedule 2 to 8 hours per day. We can guarantee a minimum 20 hrs/week occupation Salary: Starting salary is 2000 EUR per month plus commission, paid every month. Business hours: 9:00 AM … [View More]

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[Twisted-Python] Mimicking a blocking API using Twisted
by Laurens Van Houtven March 26, 2012

March 26, 2012

Hi, I'm trying to find out if there's a reasonable way to mimic a blocking API with an existing non-blocking API. I want to do this so I can write doctests. For example, I want to make a remote AMP call. It returns a deferred. Instead of returning a deferred, I want it to block until the deferred fires. The "obvious" way to do this would be to run the reactor in a different thread. This would not be necessary if the reactor were restartable, but it ain't. I've found at least one mailing … [View More]

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[Twisted-Python] How to use multi-core CPU in Twisted
by Peng Xiao -X (penxiao - Digital China at Cisco) March 26, 2012

March 26, 2012

Hi experts I want to use multi-core of CPU in twisted for parallel programming. Could anyone tell me how to archive that? Very thanks. Best Regards, Xiao Peng

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[Twisted-Python] Start New Employment Today
by corydodt＠twistedmatrix.com March 26, 2012

March 26, 2012

I would like to take this time to welcome you to our hiring process and give you a brief synopsis of the position's benefits and requirements. If you are taking a career break, are on a maternity leave, recently retired or simply looking for some part-time job, this position is for you. Occupation: Flexible schedule 2 to 8 hours per day. We can guarantee a minimum 20 hrs/week occupation Salary: Starting salary is 2000 EUR per month plus commission, paid every month. Business hours: 9:00 AM … [View More]

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[Twisted-Python] Weekly Bug Summary
by exarkun＠twistedmatrix.com March 25, 2012

March 25, 2012

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[Twisted-Python] when will failure.Failure() be a problem?
by gelin yan March 23, 2012

March 23, 2012

Hi All As regards issues like #5567 & #4219, Failure object creation is not thread safe. I use deferToThread daily due to many blocking apis still have to be used in my system. I looked into the code and noticed there is a global count used in Failure.__init__. An increment will be made for every __init__ invoke. I consider it is one part can be treated as thread unsafe. Because I didn't use Failure() besides of logging exec_info and didn't meet any crash issue related to Failure() so … [View More]

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Re: [Twisted-Python] [Twisted-commits] r33889 - Merge elementresource-5395: Add renderElement, for rendering Elements.
by Itamar Turner-Trauring March 23, 2012

March 23, 2012

On 03/16/2012 10:51 PM, dreid(a)wolfwood.twistedmatrix.com wrote: > Author: dreid > Date: Fri Mar 16 20:51:46 2012 > New Revision: 33889 > > Added: > trunk/twisted/web/topfiles/5395.feature > - copied unchanged from r33888, /branches/elementresource-5395/twisted/web/topfiles/5395.feature > Modified: > trunk/twisted/web/template.py > trunk/twisted/web/test/test_template.py I notice no documentation was added. Perhaps we should start requiring … [View More]

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[Twisted-Python] questions about twisted usage
by Uri Okrent March 22, 2012

March 22, 2012

Hello all, I'm a twisted novice, but I was brought on to a project where twisted is pretty heavily in use. I'm running into all sorts of issues that make me wonder if we're using twisted properly or as it was intended. I have been through the documentation, but I think I need more in-depth answers. So here are a bunch of general questions about twisted. Once I understand this stuff I think I might be able to ask more cogent questions about my specific implementation (or maybe understand why … [View More]

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[Twisted-Python] [ANN]: Autobahn WebSockets new release
by Tobias Oberstein March 22, 2012

March 22, 2012

New releases of AutobahnPython and AutobahnTestSuite completed: AutobahnPython ========================== Release 0.5.0 of AutobahnPython is done, including a bunch of new features, improvements and some fixes: WebSocket: - DoS protection: WS opening handshake timeouts (configurable) - DoS protection: failing TCP by drop vs abort (configurable) - performance: optimized buffer management - performance: optimized/pluggable frame maskers - performance: PyPy compatibility/testing - … [View More]performance: IOCP/epoll/kqueue compatibility/testing - feature: prepareMessage/sendPreparedMessage - feature: for WSS clients, automatically create TLS context - feature: user agent WS support detection helper WAMP: - feature: exclude/eligible lists for publish - feature: Welcome message implemented - performance: optimized msg dispatch to subscribers Misc: - polished / completed docs Links: - Package: http://pypi.python.org/pypi/autobahn - Source: https://github.com/tavendo/AutobahnPython - Reference: http://autobahn.ws/developers/reference/python/index.html - Home (under construction): http://autobahn.ws/developers/autobahnpython AutobahnTestSuite ========================== New release of AutobahnTestSuite: - now comes completely packaged on PyPi - installs as a single tool: "wstest" - wstest includes 12 modes The modes: - fuzzing: the known fuzzing client/server doing the WS test suite dance - echo: simple WS echo client and server for testing - broadcast: simple WS broadcast server and client driver for testing - testee: client and server to test Autobahn itself - wamp: test client and server for WAMP implementors and - wsperfcontrol / wsperfmaster: We have started collaborating with the WebSocket++ project (Peter Thorson) to build a distributed WS load generator / performance testing tool. This will allow running multiple instances of the "wsperf" load generator/probe distributed both in LAN and WAN. The probe will produce load / tests onto a testee target WS server. AutobahnTestSuite will act as a controller for the probes, aggregate results, produce web UI, .. This thing is preliminary / still in the cooking .. but I think it has the potential to take "WS testing" to the next level. Links: - Package: http://pypi.python.org/pypi/autobahntestsuite - Source: https://github.com/tavendo/AutobahnTestSuite - Docs: http://autobahn.ws/testsuite - wsperf: http://www.zaphoyd.com/wsperf Misc Pointers ============== - AutobahnTestSuite (the WebSocket testsuite) : has been split off into own repo / package - AutobahnJS (WAMP/JS implementation) : also was split off An overview of all Autobahn related code repos on GitHub: http://autobahn.ws/developers/code A documentation of WAMP (The WebSocket Application Messaging Protocol) - asynchronous RPC/PubSub over WebSocket is started on http://wamp.ws/ [View Less]

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[Twisted-Python] unhandled error in example pb_client.py
by Wolfgang Rohdewald March 19, 2012

March 19, 2012

this is twisted 11.0.0 on kubuntu 11.10 if I call cd /usr/share/doc/python-twisted-words/examples/pb_client.py python pb_client.py fdfdasfdfdas.com 1000 a b c I am getting an unhandled error. Same for servers not answering or rejecting. how would I have to modify pb_client if I want to catch and handle all errors? my real-world problem is more complicated: In case of error I show a modal Qt4 message box. This gives me interactions between twisted and qt4reactor leading to infinite … [View More]

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[Twisted-Python] Problem about Multithread
by hz hanks March 18, 2012

March 18, 2012

Hi, All I just started Twisted and I've a problem when using it. I want to write a program for both the client and the server that the client can download something from the server. Therefore, I want every client and server pair can use multithread to download the different parts of the files at the same time in order to increase the download speed. But I just know how to send simple message between server and client, such as protocol.Protocol.dataReceived. Any one can give me some advice. … [View More]

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[Twisted-Python] Weekly Bug Summary
by exarkun＠twistedmatrix.com March 18, 2012

March 18, 2012

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[Twisted-Python] cfreactor and global state
by Itamar Turner-Trauring March 18, 2012

March 18, 2012

twisted.internet.test.reactormixins says: CFReactor uses APIs which manipulate global state, so it's not safe to run its own reactor-builder tests under itself. We also don't have a buildslave running under cfreactor. Which means it's currently completely untested. I filed a ticket to fix that - https://bugs.launchpad.net/twisted-buildbot-configuration/+bug/954680 That still leaves the problem with global state though. Since we want to move towards having tests create new reactors,… [View More]

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[Twisted-Python] "twistd web --port=9000" no longer works
by Itamar Turner-Trauring March 18, 2012

March 18, 2012

Apparently this was removed as part of deprecating the old strports syntax, but: 1) "twistd web --port=9000" never gave a deprecation warnings. itamar@blake:~$ twistd --version twistd (the Twisted daemon) 11.0.0 Copyright (c) 2001-2011 Twisted Matrix Laboratories. See LICENSE for details. itamar@blake:~$ twistd -n web --port=9000 --path=/ 2012-03-17 20:50:21-0400 [-] Log opened. 2012-03-17 20:50:21-0400 [-] twistd 11.0.0 (/usr/bin/python 2.7.2) starting up. … [View More]

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[Twisted-Python] a weird problem about IOCP reactor and perspective broker
by gelin yan March 17, 2012

March 17, 2012

Hi all I attach two files for this problem. When i used iocp reactor with pb, I noticed once the remote method returned a deferred object, the client app would raise many exceptions..kinda weird. It is ok to return the value directly (no defer) The most interested part is when I used select reactor, everything was fine..I am not sure whether it is a bug on IOCP. OS: windows 7 64 bit py: 2.6.6 32bit twisted version: 12.0.0 Regards gelin yan

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Re: [Twisted-Python] libusb-1 file descriptors
by Vincent Pelletier March 16, 2012

March 16, 2012

Hi. First, sorry for non-threaded reply. I found the thread on gmane while googling a bit. I'll try to explain the design and intended use of python-libusb1 polling integration. I lack twisted knowledge to tell how it could be integrated, though. As for the "poller" interface, it's python's select.poll interface. Basically, libusb needs to be called into explicitly[1] whenever events needing some handling occur. It signals those events through a set of poll- able file descriptors[2]. … [View More]

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[Twisted-Python] Twisted Log Efficiency is poor?
by Peng Xiao -X (penxiao - Digital China at Cisco) March 15, 2012

March 15, 2012

Hi experts, I have a question about twisted log. I used “from twisted.python import log” and “log.msg(msg_str)” to store log for my twisted program (about 40MB log message) But it’s efficiency is poor, it will take more time to finish my program when the log is open, if I close the log, the program will be more faster than before. What is the problem? What should I do? Best Regards, Xiao Peng(肖鹏) Cisco Systems GSP-Beijing (China) Office: +86 10 8507 7181 Mobile: +86 18600560077(preferred)

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[Twisted-Python] Anyone still using Python 2.5?
by Itamar Turner-Trauring March 14, 2012

March 14, 2012

In particular, are you using recent versions of Twisted with Python 2.5? Dropping support for 2.5 would make it easier for us to begin the work of supporting Python 3, so I'm wondering how widespread the use of Python 2.5 is. (If you're using the version of Twisted included with your distro that doesn't really count, since lack of support in newer releases is less relevant.) If you are using Python 2.5, what is the constraint keeping you there? There's Ubuntu LTS 8.04 - any other … [View More]

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[Twisted-Python] accurate periodic call
by Zoran Bošnjak March 14, 2012

March 14, 2012

Hello all, I was astonished to find out that looping call period depends on the system time by default. The periodic tick can even stall for a long time, if the system time jumps backwards during program execution. It turned out that this is in fact a python problem (not providing a monotonic time, at least not for posix). I urgently need accurate periodic call in my program and I've found the solution below that seems to be working. I kindly ask you for your comments: - Is this monotonic_time … [View More]

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[Twisted-Python] Basic Resource Tree question
by Lusana Ali March 14, 2012

March 14, 2012

Hi, Im trying to setup just a very simple site using a Resource Tree (some code below). The problem I'm having is getting the root / to render. so when i go to domain.com/ I get "No Such Resource No such child resource" The child nodes {terms,profile} are rendering fine. So looking at the resource tree and the main.py which holds the Main() Resource... how can I fix this issue. I have already tried setting isLeaf = True in Main() but that breaks terms and profile Cheers server.py ===========… [View More]

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[Twisted-Python] PyCon and Sprint Photos
by Duncan McGreggor March 14, 2012

March 14, 2012

Hey folks, I put up the tiny amount of photos I took this year here, many of which are of Twisted hackers: http://www.flickr.com/photos/oubiwann/sets/72157629579346369/ Enjoy! /me awaits more and better photos from others... d

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[Twisted-Python] HTTPS proxy with twisted?
by Steve Chapel March 13, 2012

March 13, 2012

Hi, I am doing a research project for a security class that involves writing an HTTP and HTTPS proxy. The intent of this proxy is to ensure that communications that should be secure are secure, without bombarding the user with false warnings about potential man-in-the-middle attacks, for example, when a website legitimately uses a self-signed certificate. I will need to write an HTTPS proxy, which will examine the certificates sent from the web server and determine whether the … [View More]

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