Mailman 3 October 2003 - Twisted

[Twisted-Python] Twisted Python 0.7.0 Prerelease Testing
by Glyph Lefkowitz 05 Aug '21

05 Aug '21

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. ______ __ __ _____ _ _ | ____ | \_/ |_____] |_____| |_____| |_____ | | | | @ t w i s t e d m a t r i x . c o m http://www.twistedmatrix.com/~glyph/

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[Twisted-Python] Re: [Twisted-commits] log stderr and non-zero exit code in CGIs, don't show info to users as it is a security risk (closes issue #241)
by Glyph Lefkowitz 31 Dec '03

31 Dec '03

On Thursday, August 28, 2003, at 10:32 AM, itamarst CVS wrote: > log stderr and non-zero exit code in CGIs, don't show info to users as > it is a security risk (closes issue #241) We shouldn't swallow errors in these situations. If it's a security risk, provide a way for the server administrator to turn it off, but this is a _bad_ default. If you doubt the wisdom of making this default, please consult any number of Perl FAQs of the form: Q. "I wrote a CGI and it works perfectly, but now I moved it to another server and I get nothing but a "500 Internal Server Error" page. How do I tell what went wrong!?!?!?" A. Look in your apache logs. --- Q. "I looked at my apache logs and nothing makes sense! How do I tell what the error was??!" A. ... Also, could you clarify the security risk of displaying stderr from CGI scripts? I've never heard of a CGI that puts security-critical information on stderr rather than stdout and makes it a risk to display to users.

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Re: [Twisted-Python] FTPClient storeFile help.
by Oisin Mulvihill 20 Nov '03

20 Nov '03

Hi, Glyph Lefkowitz wrote: > Oisin Mulvihill wrote: > >> I confess I really don't know how to handle the two deferred >> object that get returned by storeFile. I just add callback/ >> errorback for each, this could be the problem. > > > If you want to wait for both, use twisted.internet.defer.DeferredList. > Why are there two deferred objects returned by storeFile? The documentation says: storeFile (self ,path ): Store a file at the given path. This method issues the 'STOR' FTP command. Returns: A tuple of two Deferreds: * Deferred IFinishableConsumer . You must call the finish method on the IFinishableConsumer when the file is completely transferred. * Deferred list of control-connection responses. This really doesn't help me much. I get the impression that storeFile isn't sending the contents of file, because its waiting for me to stream the file contents somehow. Maybe via IFinishableConsumer? In my current program, using ftplib, I do the following to upload a file: : ftp.storbinary('STOR %s' % (filename), fp) : This has the filename and a file descriptor passed to it. Is something like this needed with storeFile? Please can someone give me an answer to this, as looking at the code for twisted.protocols.ftp isn't helping much either. This function seems to be a mystery to me and I want to understand how to use it properly. Thanks, om >> Can anyone enlighten me as to what I'm doing wrong. I would >> really like to use proper async behavior for doing the uploads, >> instead of using threads + ftplib. > > > The FTP implementation in Twisted is sub-optimal (although that's > mostly the server). If you don't get any satisfactory responses I > recommend assigning a bug to spiv in the tracker :). > -- Oisin Mulvihill Engines Of Creation Email: oisin(a)enginesofcreation.ie Work: +353 1 6791602 Mobile: +353 868191540

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[Twisted-Python] request getUser()/getPassword() in Woven and resources...
by Stuart Hungerford 05 Nov '03

05 Nov '03

Hi all, I've had a twisted web application running for a while that uses request.getUser() and request.getPassword() in a resource subclass render() method to make the web browser prompt for a username/password. I've been refactoring this application to use Woven page subclasses and the same request.getFoo() calls now return empty strings rather than None, and no prompting from the browser is done. Is there some gotcha in using request.getUser() and request.getPassword() from Woven page subclasses? Cheers, Stu -- :: Stuart Hungerford (stuart.hungerford(a)anu.edu.au) :: ANU Internet Futures Group

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[Twisted-Python] form and submit
by vicky lupien 03 Nov '03

03 Nov '03

I have a form with a submit button. I want to send my data from the form in a web page to an other web page. Also, I want to check if the data is correct. I'm new to twisted, so I need some help Vicky _________________________________________________________________ MSN Messenger : discutez en direct avec vos amis ! http://messenger.fr.msn.ca/

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[Twisted-Python] Dynamic form with twisted
by vicky lupien 03 Nov '03

03 Nov '03

I really need help. I want to make a form dynamically. I don't want to use FormProcess and I do not understand very well how it works. If someone have documentation on forms (not the one on twisted matrix), it will be appreciated. Vicky _________________________________________________________________ MSN Messenger : discutez en direct avec vos amis ! http://messenger.fr.msn.ca/

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[Twisted-Python] Woven and deferreds in controllers.
by Syver Enstad 31 Oct '03

31 Oct '03

I've heard on this list that it is possible to use deferreds in controllers. Let's say I have a page class that needs to load a deferred object before any of it's wmfactory_ methods make any sense. What I have done previously is to store the deferred and chain new deferreds on every wmfactory method and return them instead of a real value. If deferred in controlers work the way I hope I could load the actual domain object from the deferred and store it in my page class before any of the wmfactory methods are called which would be nice. So my question is how do I use a controller for this (if it is possible). Btw. I've yet to upgrade to 1.1 because the application is still using the old cred system.

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[Twisted-Python] migration from IIS to Twisted
by Max Ischenko 31 Oct '03

31 Oct '03

Hi, I have a really big ASP/IIS-based system which I'm trying to (partially) rewrite and evolve with python. I've already wrote some useful code in using Cheetah/WebKit and now I'm thinking about the best way to integrate it back into the legacy system. As my python code depends on WebKit very little and Cheetah is a standalone processor that could probably be plugged into Twisted easily I'm evaluating the possibility to switch to Twisted. There is nothing wrong with Webware/WebKit -- it is a great platform, but I'd like to make use of some Twisted components, like twisted.enterprise.row or twisted.cred. If I'm to switch to Twisted what could you suggest for IIS-Twisted integration? I'm currently thinking about simple Response.Redirect('...') from .asp to twisted.web. But I'd also like to share data and session's state between the two. For example, to match twisted.web.server.Session with IIS session. Dunno how this could be done though. More promising (may be) but surely more complex way would be to write some kind of IIS-Twisted adapter that uses COM to talk to VB and twisted.spread to talk to Twisted.

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[Twisted-Python] Re: [Twisted-commits] THE EXTENSION IS .C! IT IS NOT A C++ FILE!
by James Y Knight 31 Oct '03

31 Oct '03

What compiler doesn't support C99 comments yet? James On Oct 30, 2003, at 6:19 PM, exarkun CVS wrote: > Modified files: > Twisted/twisted/protocols/_c_urlarg.c 1.7 1.8 > > Log message: > THE EXTENSION IS .C! IT IS NOT A C++ FILE!

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[Twisted-Python] More about twistd and win32 service
by Justin Johnson 31 Oct '03

31 Oct '03

Itamar and others, Sorry for the delayed reply and thank you for your constant help. I setup my NT service as you described, importing the win32eventreactor and installing it. The service starts up fine, but when I stop the service I get the following in the logs. The "15:08 ... Unexpected..." entry only gets dumped in the log when stopping the service. I'm not sure how I'd go about debugging this more since I can't get anymore output than what's dumped to the log. Any ideas? I've attached winsvc.py and a couple other files it is dependent on. Thanks again. -Justin 2003/10/30 15:07 Eastern Standard Time [-] Log opened. 2003/10/30 15:07 Eastern Standard Time [-] twisted.spread.pb.PBServerFactory starting on 8787 2003/10/30 15:07 Eastern Standard Time [-] Starting factory <twisted.spread.pb.PBServerFactory instance at 0x00DF8D28> 2003/10/30 15:08 Eastern Standard Time [-] Unexpected error in main loop. 2003/10/30 15:08 Eastern Standard Time [-] Traceback (most recent call last): File "E:\Python22\Lib\site-packages\win32\lib\win32serviceutil.py", line 635, in SvcRun self.SvcDoRun() File "E:\ccase\python\winsvc.py", line 24, in SvcDoRun reactor.run() File "E:\Python22\Lib\site-packages\twisted\internet\default.py", line 122, in run self.mainLoop() --- <exception caught here> --- File "E:\Python22\Lib\site-packages\twisted\internet\default.py", line 133, in mainLoop self.doIteration(t) File "E:\Python22\Lib\site-packages\twisted\internet\win32eventreactor.py", line 180, in doWaitForMultipleEvents fd, action = events[handles[val - WAIT_OBJECT_0]] exceptions.KeyError: <PyHANDLE:224> ----- Original message ----- From: "Itamar Shtull-Trauring" <itamar(a)itamarst.org> To: twisted-python(a)twistedmatrix.com Date: Wed, 22 Oct 2003 14:50:10 -0400 Subject: Re: [Twisted-Python] twistd and win32 service On Wed, 22 Oct 2003 12:24:42 -0600 "Justin Johnson" <justinjohnson(a)fastmail.fm> wrote: > The general consensus on the mailing list archives seems to be that > I'd need to setup my code to not require twistd but just run > standalone. Uh. *Maybe* that's the consensus, but it's not actually correct. You can have a tap or tac run as a NT service. Lets say you have a script "server.py" that is runnable with "twistd -y", you can do (and similar code will work for TAPs): import sys, os import win32serviceutil, win32service class MyService(win32serviceutil.ServiceFramework): """NT Service.""" _svc_name_ = "MyService" _svc_display_name_ = "MyService server" def SvcDoRun(self): import server f = open(os.path.join(server.rootPath, "cyberhigh.log"), 'a') from twisted.python.log import startLogging from twisted.application.app import startApplication from twisted.internet import reactor startLogging(f) startApplication(server.application, 0) reactor.run() def SvcStop(self): self.ReportServiceStatus(win32service.SERVICE_STOP_PENDING) from twisted.internet import reactor reactor.stop() if __name__ == '__main__': win32serviceutil.HandleCommandLine(MyService) -- Itamar Shtull-Trauring http://itamarst.org/ Available for Python & Twisted consulting _______________________________________________ Twisted-Python mailing list Twisted-Python(a)twistedmatrix.com http://twistedmatrix.com/cgi-bin/mailman/listinfo/twisted-python

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Twisted October 2003