Mailman 3 August 2003 - Twisted

[Twisted-Python] Problems with wxPython and Twisted on linux
by Alexander Zhukov Aug. 14, 2003

Aug. 14, 2003

Hi. I've problems running wxPython with twisted reactor under linux. When I try to run the application with wxsupport.install(app) reactor.run() I get the following exception: Traceback (most recent call last): File "wxdemo.py", line 36, in ? demo() File "wxdemo.py", line 33, in demo reactor.run() File "/usr/lib/python2.2/site-packages/twisted/internet/default.py", line 121, in run self.startRunning(installSignalHandlers=installSignalHandlers) File "/usr/lib/python2.2/… [View More]

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[Twisted-Python] I am having severe problems with guard.
by Francisco Miguel Colaço Aug. 13, 2003

Aug. 13, 2003

I am having severe problems with guard. I am making a site in which users must be authenticated, and a session must be following and reacting to the user's activities. I have made the following module. from twisted.cred.portal import Portal, IRealm from twisted.web.util import Redirect import page, model reload (page) reload (model) class Realm: __implements__ = IRealm def requestAvatar (self, id, mind, *interfaces): if IResource not in interfaces: … [View More] raise NotImplementedError ('I cannot do non-web logins yet.') ## We are in a web login. m = interfaces[0].model ## This line should raise an exception... thus, this is never executed. if id: m.orig['username'] = id else: m.orig['username'] = None resource = page.Page (m) resource.putChild ('', SessionWrapper (UsernamePasswordWrapper (dem_portal, callback = redirectToIndex))) return IResource, resource, None ## Create an instance of the realm. dem_realm = Realm () from twisted.cred.checkers import InMemoryUsernamePasswordDatabaseDontUse, AllowAnonymousAccess from twisted.web.woven.guard import UsernamePasswordWrapper, SessionWrapper def redirectToIndex (dummy): """I will redirect to the site main page. """ return Redirect ('/index.rpy') def createResource (): ## Create a memory checker. checker = InMemoryUsernamePasswordDatabaseDontUse () checker.addUser ('fhc', '12345') checker.addUser ('humberto', 'zzzzz') checker.addUser ('aes', 'qa') ## Allow access from unknowns. anon = AllowAnonymousAccess() ## Create the portal. dem_portal = Portal (Realm) dem_portal.registerChecker (checker) dem_portal.registerChecker (anon) m = model.get_new_model () upass = UsernamePasswordWrapper (dem_portal, callback = redirectToIndex) resource = page.Page (m, templateFile = 'index.template.xhtml') resource.putChild ('', SessionWrapper (upass)) return resource page.Page is a customized page that works well, lest that the 'init-perspective' link keeps returning 'No such Resource'. The page as several wchild_, wvfactory_ and wvupdate_ attached to it. I also would like to contribute back the widgets I have done, as soon as I get them ready and session aware, if someone has the need for them (calendar, menu tabs, localized date, title boxes, etc.) I have sorted the documentation, logged just about any kind of object dictionary information and even browsed through the sources, but I still feel completely lost. If help can be provided by someone, I would appreciate if these questions could be answered: 1. Why doesn't perspective-init work? 2. How can I put up a customized login page? 3. How can I access the page (resource) within requestAvatar? 4. How can I access the session object from a widget? 5. How can I examine and issue cookies? I hope this does not give you a lot of trouble. Programming twisted has been both a wonderful and humbling experience, but I do prefer Woven to anything I have tried before. I find it an excellent piece of work and wish to stick with it for my web programming, while I learn the rest of Twisted for all the other communication needs. Thanks in advance. Francisco Colaço [View Less]

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[Twisted-Python] win32eventreactor problems
by Justin Johnson Aug. 13, 2003

Aug. 13, 2003

I had the win32eventreactor working a while back, but now I have a problem and I'm not sure what's going on. The attached file installs win32eventreactor as follows: --- if not config.isUnix: from twisted.internet import win32eventreactor win32eventreactor.install() --- When I run this I get the following error: --- Traceback (most recent call last): File "E:\ccase\python\uhg\uht\process.py", line 13, in ? win32eventreactor.install() File "E:\Python22\Lib\site-packages\twisted\… [View More]

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[Twisted-Python] Deferred database transaction confusion
by Lucas Taylor Aug. 13, 2003

Aug. 13, 2003

Greetings! I'm trying to figure out the best way to accomplish database transactions and I haven't quite got my head wrapped around deferreds and the adbapi. I'm hoping someone can nudge me in the right direction. Basically, we have simple terminals that communicate over dialup lines to a host server. The host server essentially handles the modem negotiation and passes everything else through to our Twisted server. We process the transaction and return the result to the client, and the … [View More]

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[Twisted-Python] Support for ICMP / traceroute ?
by popov Aug. 13, 2003

Aug. 13, 2003

(a new try, as it seems the message was broken the last time I sent it) Hi, I'm currently evaluating 'Twisted' to make cross-platform network developments. The targeted OS are: Win32 (W2K and above), Linux. More Unix flavors would have to be supported later on. >From what I've read about 'Twisted', it should work on those platforms as it is python-based. Could you confirm that my own .py scripts will run as-is under those different platforms (provided I myself don't use platform-specific … [View More]

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[Twisted-Python] Ann: Win32/Python2.3 available
by Cory Dodt Aug. 13, 2003

Aug. 13, 2003

Just a note to let you Windows folks know that there are now official installers for Python 2.3. These are built against 1.0.7alpha4. Python 2.2 is also now available for this release. These installers represent a complete overhaul of both the installer itself and the system used to build it. Let me know at http://twistedmatrix.com/bugs if there are any problems (assign to moonfallen); it's currently untested on WinXP and Win98. I'd also be interested in hearing about any problems if … [View More]

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[Twisted-Python] woven View question
by Abe Fettig Aug. 13, 2003

Aug. 13, 2003

Is it considered cool to use a Woven template to pass arguments to the View? For example: <div view='MyCustomView' doOptionalStuff='1'></div> ...where the View will read the doOptionalStuff parameter and alter it's output accordingly. Abe

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[Twisted-Python] Patch to procmon.py
by Nicola Larosa Aug. 13, 2003

Aug. 13, 2003

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 The class ProcessMonitor, from t.runner.procmon, is very useful to start and monitor processes from within Twisted. Alas, that class sends all output from the controlled processes to the log. The attached simple patch to the startProcess method allows one to substitute another protocol for the LoggingProtocol one, on a per-process basis, keeping the current one as default. Would it be appropriate for me to submit it to the bug tracker, using it … [View More]

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[Twisted-Python] Watching over a Twisted daemon
by Nicola Larosa Aug. 12, 2003

Aug. 12, 2003

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 I'm using the ProcessMonitor class from t.runner.procmon, with good results, to start and monitor a few daemons from Twisted. If a daemon goes down, it is restarted immediately, because the class does not detach from the daemons' streams. This unfortunately introduces a single point of failure, because if the Twisted process goes down, it not only does not monitors the daemons anymore, but effectively takes them down with it. It would be nice if … [View More]

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[Twisted-Python] PB service send output to client
by Justin Johnson Aug. 12, 2003

Aug. 12, 2003

What is the best way to have a PB service send output to a client to be printed on the screen? The only way I'm aware of is by making the client be a PB service as well with only a remote_print method, but I wasn't sure if that was the best way to do this. Thanks. -Justin

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