Mailman 3 March 2005 - Twisted

[Twisted-Python] Twisted based LDAP protocol implemenation
by Andrzej Leszczynski March 15, 2005

March 15, 2005

I am looking for a Twisted based LDAP protocol implementation (both versions 2 and 3). Is anybody aware of such, even in very early development phase. If there are neither any activity in that area nor actual plans, would Twisted be interested in adopting one into its code base? What would be level of interest of Twisted community? I am interested in both client and server side. Please advice, AndyL

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RE: [Twisted-Python] Maximum sockets open
by Sinang, Danny March 15, 2005

March 15, 2005

Thanks Ken. How do we determine (from the O.S.) how many sockets are currently open ? Regards, Danny -----Original Message----- From: twisted-python-bounces(a)twistedmatrix.com [mailto:twisted-python-bounces@twistedmatrix.com] On Behalf Of Ken Kinder Sent: Tuesday, March 15, 2005 12:47 AM To: Twisted general discussion Subject: Re: [Twisted-Python] Maximum sockets open A while ago, we were opening up a ton of sockets and got a "Too many files open" error. I don't know what you're getting, … [View More]

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[Twisted-Python] More on PB Copyable Errors
by Justin Johnson March 14, 2005

March 14, 2005

I would really like to be able to pass custom exceptions over the wire in PB. Previous discussion on this list ended with the conclusion that it currently isn't possible without hacking a local copy of Twisted. I have done that to get the result I want, with minimal testing, and would like to get some discussion going around this topic. Attached are 3 test files, s.py for the server, c.py for the client, and e.py for the error definitions which are imported by both s.py and c.py. If I make … [View More]

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[Twisted-Python] Weekly Bug Summary
by James Y Knight March 14, 2005

March 14, 2005

Bug summary ______________________ Since 2005-03-05 04:13:21.060000: Bugs opened: 9 Bugs closed: 17 Total open bugs: 326 (-8) Urgent: 9 (+2) Bug: 118 (-13) Feature: 131 (+2) Wish: 68 (+1) New / Reopened Bugs ______________________ ==== Bug ==== twisted.python.rebuild fails if python 2.4's decimal module is imported (1 1/4 hours ago) http://twistedmatrix.com/bugs/issue921 opened by marienz e-mail followup rejected (2 days ago) CLOSED http://… [View More]

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[Twisted-Python] Re: Twisted and the Posh Module
by Ed Suominen March 14, 2005

March 14, 2005

On Monday 14 March 2005 10:13 am, twisted-python-request(a)twistedmatrix.com wrote: > Has anyone tried playing with Twisted and the posh module? I need to > do some CPU-intensive stuff inside the reactor, which unfortunately > holds on to the GIL. I was thinking of just making a deferToPosh() > type of method in the spirit of deferToThread(), but forking on each > operation would be pretty expensive. Which brings up the question of > having process pools. > > Has anyone … [View More]

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[Twisted-Python] twisted.web.server and memory
by Lenny G Arbage March 14, 2005

March 14, 2005

A couple of questions about twisted.web server's memory management: 1- Is it normal for the server process to consume large amounts of memory (and never free it) if large requests are sent? 2- Assuming the answer to #1 is 'no,' what might I be doing wrong? I have subclassed Resource and added it to the Site tree with putChild. My Resource subclass processes mutlipart/form-data style file uploads. It looks to me like the Request object that is passed in contains /all/ the data in the … [View More]

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Re: [Twisted-Python] twisted.web.server and memory
by Lenny G Arbage March 14, 2005

March 14, 2005

Run the following web server (memoryhogserver.py) and load the provided form (post.html) into a browser of your choice and choose a large file (~100MB) to submit. Notice the memory usage of the python process (on my machine, around 150MB resident). memoryhogserver.py: from twisted.web.resource import Resource from twisted.web import server, resource from twisted.internet import reactor import os class ROOT(… [View More]

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[Twisted-Python] sending queries and responses with the new dns module
by jarrod roberson March 14, 2005

March 14, 2005

can someone give me a quick code snippet on how to say construct and send a simple query and construct and send a simple response using the new dns module? I have a nice mdns listener written and I can see all the traffic flying around but I have not had any luck in sending queries or responses . . .

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[Twisted-Python] Twisted and the Posh Module
by Ken Kinder March 14, 2005

March 14, 2005

Has anyone tried playing with Twisted and the posh module? I need to do some CPU-intensive stuff inside the reactor, which unfortunately holds on to the GIL. I was thinking of just making a deferToPosh() type of method in the spirit of deferToThread(), but forking on each operation would be pretty expensive. Which brings up the question of having process pools. Has anyone done anything like this? I don't really need any interaction between the worker processes and Twisted, so in theory I … [View More]

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[Twisted-Python] Python Xlib + Twisted
by Ed Suominen March 14, 2005

March 14, 2005

Below is what I sent to python-xlib-users this morning. Hopefully there's some interest in getting a Twisted-driven version of Python Xlib done. I think I've learned the innards of Twisted well enough by now to do it myself (writing a new protocol for X events), but help and advice is of course welcome. --- Ed Suominen Registered Patent Agent Open-Source Software Author (yes, both...) Web Site: http://www.eepatents.com ----- On Monday 14 March 2005 08:08 am, Peter Liljenberg wrote: > … [View More]Simon Forman, calroc99(a)users.sourceforge.net, has kindly offered to > maintain Python Xlib from now on. Give him a big hand, folks. > > I'll resign as project admin, but will still lurk around and may even > do the occasional CVS commit (here's hoping). > > /Peter Liljenberg Python Xlib is a neat project, and I'm glad to see the continued activity. One of the projects I've been planning for the near future is to add some functionality to the connection code of Python Xlib so that it can operate asynchronously using the Twisted networking framework rather than relying on blocking and threads. I'm planning to integrate the patched Python Xlib into WinDictator, a Windows-Linux bridge I wrote and use for running dictation software in VMware and having the keystrokes typed with X events. Briefly, the Windows copy of WinDictator is a TCP server to a Linux client and presents a dictation window on the Windows machine. Using the dictation software's "direct dictation" feature, the user generates text in the dictation window, which is sent immediately to the Linux client. The Linux client then generates an X "KeyPress" event (followed by an X "KeyRelease" event) corresponding to the character sent from the Windows client. It is assumed that the (virtual) Windows machine is insecure and will be firewalled off from the Internet anyhow, so it is the TCP server. Plus, multiple Linux clients can connect to and use a single Windows server at different times. Advantageously, the client-server pair allows "direct dictation" from a text entry window running on Windows (along with the Windows-only dictation software) to whatever word processor the user is employing under Linux. The text entry window can be viewed on a separate screen of a separate Windows box, or can appear somewhere on the Linux computer's display. The latter can be accomplished by emulation with VMware or (I think) QEMU, or by VNC operation of the separate Windows box. Twisted's "Perspective Broker" maintains the client-server communication very nicely at a high level. WinDicator works great with the xte program "typing" the keystrokes, and I use it every day. But I want to improve it and need the finer-grained control of Python Xlib to do so. Ideally, I would like to see Python Xlib's networking integrated smoothly into Twisted's asynchronous event loop for performance, compatibility, and because it is just plain cool. See http://twistedmatrix.com/services/twisted-advantage for more info about Twisted, if you're interested. It runs my web site plus my boss's site (http://valuablepatents.com), among other things, off of a single main python thread. Offers of cooperation, either to add Twisted capability to Python Xlib or with WinDictator (GPL) itself, would of course be welcomed. [View Less]

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