Mailman 3 September 2007 - Twisted-web

Test
by Philippe Lafoucrière 05 Aug '21

05 Aug '21

Hi all just a test

3 2

Re: [Twisted-Python] tracebacks in twisted web2
by David Reid 26 Sep '07

26 Sep '07

Hi Paul On Sep 25, 2007, at 7:04 PM, Paul Perez wrote: > Dear List: > > I am having a heck of a time trying to figure out why this > traceback is happening, and I was hoping that you could shed some > light on the situation. I am sorry for bothering you with this > simple thing, but I can't seem to figure it out! No need to apologize, however twisted-web is a better list for this question. <snip> > ---------------------------------------------------------------------- > ------------------------------- > 2007-09-25 18:38:38-0700 [-] Original exception: > 2007-09-25 18:38:38-0700 [-] Unhandled Error > Traceback (most recent call last): > File "C:\Projects\PyServer\twisted\internet\defer.py", > line 304, in _startRunCallbacks > > File "C:\Projects\PyServer\twisted\internet\defer.py", > line 317, in _runCallbacks > > File "C:\Projects\PyServer\twisted\internet\defer.py", > line 281, in _continue > > File "C:\Projects\PyServer\twisted\internet\defer.py", > line 277, in unpause > > --- <exception caught here> --- > File "C:\Projects\PyServer\twisted\internet\defer.py", > line 317, in _runCallbacks > > File "C:\Projects\PyServer\twisted\web2\server.py", line > 518, in _cbFinishRender > > exceptions.TypeError: html is not a resource or a response this exception usually indicates that a render method didn't return an IResponse object but instead returned a string (or none.) The above code did not include anything that implemented IResource. > 2007-09-25 18:38:39-0700 [-] Unhandled error in Deferred: > 2007-09-25 18:38:39-0700 [-] Unhandled Error > Traceback (most recent call last): > File "C:\Projects\PyServer\twisted\internet\defer.py", > line 317, in _runCallbacks > > File "C:\Projects\PyServer\twisted\web2\server.py", line > 476, in _processingFailed > > File "C:\Projects\PyServer\twisted\internet\defer.py", > line 200, in addErrback > > File "C:\Projects\PyServer\twisted\internet\defer.py", > line 182, in addCallbacks > > --- <exception caught here> --- > File "C:\Projects\PyServer\twisted\internet\defer.py", > line 317, in _runCallbacks > > File "C:\Projects\PyServer\twisted\web2\server.py", line > 492, in _processingReallyFailed > > File "C:\Python24\lib\site-packages\twisted\web2 > \http.py", line 446, in writeResponse > self.chanRequest.writeHeaders(response.code, > response.headers) > File "C:\Projects\PyServer\twisted\web2\channel\http.py", > line 431, in writeHeaders > > File "C:\Projects\PyServer\twisted\web2\channel\http.py", > line 466, in _writeHeaders > > exceptions.AttributeError: 'HTTPChannelRequest' object has > no attribute 'transport' This might have something to do with the fact that you're calling writeResponse. You should never call writeResponse directly on a request object. You should _return_ an IResponse or a deferred which results in an IResponse from an IResource's render method.

1 0

Non twisted xmlrpc client to twisted xmlrpc server
by MaTias Barletta 20 Sep '07

20 Sep '07

Guys.. Any guidance will give me more hours of sleep! I went through all the docs, but I must be missing something! Have a Flash client doing xmlrpc calls Hava a twisted xmlrpc server but I receive deferred objects that non twisted xmlrpc clients can't understand!... What do you recommend? I am trying to get asterisk status and data using the great starpy.. Your help is of great value! Cheers MaTT

2 1

Nevow macro and deferred
by Manlio Perillo 08 Sep '07

08 Sep '07

I'm having troubles when returning a deferred from a macro. Is this supported? Thanks and regards Manlio Perillo

1 0

Streaming render
by Tristan Seligmann 07 Sep '07

07 Sep '07

I've run into a curious blank wall here: I'm rendering a page, basically consisting of an HTML table of results plus various fluff. In order to generate these results, I fire off an asynchronous operation to which I pass a callback; the callback is then invoked once per result, corresponding to a row in the resulting table. Currently I'm just firing the operation off in beforeRender, building up a list as an instance attribute on the class in question, and then preceeding with the rendering, using that list in a renderer later. For small result sets, this works fine; however, I'm now running into situations where I have over 10k rows in the resulting table. Under these circumstances, holding all this data in memory and then rendering it all at once incurs a rather large and unnecessary memory overhead; also, there is a large delay between the client's request, and the response document beginning to be streamed. I'd like to start streaming the document as soon as I start receiving the results of the operation, but I'm stumped on how to actually implement this. If I return a deferred from the render method, I cannot fire this deferred until all of the rows have been built up. Any ideas? I'm sure I've overlooked something obvious here, but I'm drawing a complete blank. -- mithrandi, i Ainil en-Balandor, a faer Ambar

3 4

Formless
by Vincent Bernat 07 Sep '07

07 Sep '07

Hi ! I have looked at formless to design forms. There are two kind of examples. The ones that use annotate.TypedInterface. With this one, I don't see how to associate some actions in the concrete implementation. For example, suppose that I want to be able to register some observers. Or should I implement __setattr__ for each attribute ? The second ones use bind_* method. Attaching actions is far more easier. However, I don't know how to change labels. By default, it uses the name of the method and add spaces before capitals. In the code source, I see that it can uses docstring too but adding one to the method does not have effect. I didn't find where to change the label of the "Call" button too. In fact, it seems that formless lacks a tutorial or a good documentation. There are some examples but not doc. Any one knows a pointer about this? Thanks ! -- Parenthesise to avoid ambiguity. - The Elements of Programming Style (Kernighan & Plauger)

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Twisted-web September 2007