Mailman 3 December 2003 - Twisted-web

Need help implementing WebDAV
by Thorsten Henninger 23 Dec '03

23 Dec '03

Hi all, I need some help implementing the WebDAV protocoll for Twisted.Web. If one implements WebDAV using Python's BaseHTTPServer, one has to specify a RequestHandler by subclassing BaseHTTPServer.BaseHTTPRequestHandler. The implementation of the WebDAV protocoll is then straight-forward. I do not understand, how to solve this with twisted web. My first guess is, that I have to do something similar as done in Twisted.web.xmlrpc ? And how to I implement the protocoll? do I have to inherit from twisted.protocols.http? I would appriciate some help on this problems, just a few hints to get me started ... regards, Thorsten -- brainbot technologies AG boppstrasse . 64 . 55118 mainz . germany fon +49 6131 211639-1 . fax +49 6131 211639-2 http://brainbot.com/ mailto:henni@brainbot.com

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exceptions.AttributeError: NevowSite instance has no attribute 'url'
by Justin Johnson 23 Dec '03

23 Dec '03

After updating to the latest CVS I get errors in the attached log file upon the initial load of my app, which uses guard and SessionWrapper for authentication. portal = login.RatControlPortal(realm) # Allow anonymous access. portal.registerChecker(AllowAnonymousAccess(), IAnonymous) # Allow users registered in the password file. portal.registerChecker(FilePasswordDB(sibpath(__file__, "passwords.txt"))) site = appserver.NevowSite( resource=SessionWrapper( UsernamePasswordWrapper(portal, callback=utility.loginCallback) ), ) I can try to get a tac together if needed, but the most recent changes in CVS looked like they might have caused the problem. Just wanted to give you some idea of what my code looks like. -Justin

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subtle copying in woven driving me crazy.
by Douglas Bagnall 21 Dec '03

21 Dec '03

I thought it was reasonable to give my player storing object a requestAvatarId method and call it a checker, and it seemed to work until it was found that new players couldn't log in. Eventually I discovered that: class Checker(dict): __implements__ = checkers.ICredentialsChecker def __init__(self): log.debug(id(self)) def requestAvatarId(self, credentials): log.debug(id(self)) gives two different numbers. Of course seperating the checker from the player model fixed this problem, and is no doubt correcter. Similarly: class SomePage(page.Page): def __init__(self, children_dict): page.Page.__init__(self) self.children_dict = children_dict log.debug(id(self.children_dict)) def getDynamicChild(self, path, request): log.debug(id(self.children_dict)) return self.children_dict.get(path, error.NoResource()) gives two different id numbers! So you can't manipulate the children by referring to the original dictionary in some other context. Again, there is an easy way around this, once you realise what is happening, and that other way is perhaps better, but this has caused me some bewilderment. Is this behaviour intentional? or necessary? It should perhaps be better documented. douglas

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Hierarchical data in Nevow (like Woven's submodels)?
by Gavrie Philipson 21 Dec '03

21 Dec '03

Hi, In Woven, it is possible to access a specific submodel of a given model, sometimes going down multiple levels. For example, <p model="/foo/bar/baz">. My application includes lots of these sub-submodel paths. How can this be done in Nevow? Is is possible to specify that I want to address some subpart of the data that is returned by a 'data' special? If so, is there any elegant syntax for this when using page templates (with HTMLRenderer)? Thanks, -- Gavrie.

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nevow CannotAdapt error
by Kevin Howe 19 Dec '03

19 Dec '03

I'm trying to run a simple nevow test: from nevow.renderer import Renderer class MyRenderer(Renderer): document = """<xml>test</xml>""" m = MyRenderer() But get the following traceback? Traceback (most recent call last): File "c:\data\htdocs\test.py", line 9, in ? m = MyRenderer() File "C:\PYTHON23\Lib\site-packages\nevow\renderer.py", line 152, in __init__ self.doc = self.precompile() File "C:\PYTHON23\Lib\site-packages\nevow\renderer.py", line 162, in precompile _documents[klsnm] = rv = flatten(ISerializable(self.document).serialize(context, None)) File "C:\PYTHON23\Lib\site-packages\twisted\python\components.py", line 77, in __call__ raise CannotAdapt("%s cannot be adapted to %s." % CannotAdapt: <xml>test</xml> cannot be adapted to <class 'nevow.iwoven.ISerializable'>.

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Session not destroyed on logout when using new cred
by Justin Johnson 19 Dec '03

19 Dec '03

The attached tac file demonstrates my problem. 1) Login with username of "user" and password of "password". A large red "None" should appear because there is no session data. 2) Reload the page. Now session data should appear. 3) Logout and login again. The session data appears right away, but I would expect it to not be available yet. Does anyone know what the proper way to have the session destroyed when I logout is? It seems like this should be done automatically for me. Thanks. -Justin

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RE: [Twisted-web] Rendering forms from HTML templates using freeform
by Gavrie Philipson 18 Dec '03

18 Dec '03

> -----Original Message----- > From: Donovan Preston [mailto:dp@divmod.org] > Sent: Monday, December 15, 2003 21:03 > To: twisted-web(a)twistedmatrix.com > Subject: Re: [Twisted-web] Rendering forms from HTML templates using freeform > [...] > However, in anticipation of freeform's coming ability to allow you to > control the layout more precisely while still auto-creating > the form, I would like to gather use cases. Can you please give me a few methods > which you will be exposing to the web, and the precisely laid > out forms which you would like to invoke those methods? If you give me > real life use cases, I will be able to keep them in mind as I do the > refactoring to support them, and probably write tests that ensure your use cases > are covered properly in the future. Hi Donovan, Thanks for the explanations. I'll try to get you specific examples -- it'll take a few days, though. -- Gavrie.

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Twisted Web behind Apache
by Michal Pasternak 18 Dec '03

18 Dec '03

Hi, where can I find documentation on setting up a Twisted Web server behind Apache? I googled a bit, but I didn't find anything official / suggested. Regards, -- Michal Pasternak :: http://pasternak.w.lub.pl :: http://winsrc.sf.net

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Input Buttons
by orya＠bgumail.bgu.ac.il 18 Dec '03

18 Dec '03

Hi everyone, my questions is this: suppose i would like to appy numeros submit buttons to a form. and use them as action keys like "restart" "stop" etc. is there a way to tell woven to activate a specific button and its model?

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submit buttons
by orya＠bgumail.bgu.ac.il 18 Dec '03

18 Dec '03

Hi everyone, i'm dealing with woven form, i wonder if it is possible to have numerous submit buttons on a single form, each can post its own data. my question is, how do i control each one to do its own without invoking the other (on GET/SET) thank you

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