Mailman 3 September 2006 - Twisted-web

Test
by Philippe Lafoucrière 05 Aug '21

05 Aug '21

Hi all just a test

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fragments with child lookup
by Markus Schiltknecht 13 Oct '06

13 Oct '06

Hi, I would like to use the child lookup mechanism (locateChild or childFactory) but then again, I want Fragments. I'm sure there is a proper way to do what I want. Let my try to explain with a URL mapping to templates mapping: / -> common.xml /foo -> common.xml / foo.xml /bar -> common.xml / bar.xml /bar/baz -> common.xml / bar.xml / baz.xml common.xml as well as bar.xml both have a 'sub-content' renderer, which calls the next template. Of course this all happens dynamically. I've tried two things: a) make locateChild always return self, () and save which child it contains (and which it has to return as it's 'sub-content'. Unfortunately that stops the children lookup and I would have to invoke it locateChild of the child with segments[1:] myself. That seems ugly. b) make locateChild return the real Child. That seems the right thing to do. But then I only get the latest child's template (i.e. baz.xml when calling the URL '/bar/baz' in the example above). How do I make that latest child render it's parents first? Regards Markus

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DOM manipulation in an athena widget
by Phil Mayers 09 Oct '06

09 Oct '06

Following on from my post of a couple of weeks ago, I'm rendering a *large* (~150 editable fields) form for a CRUD application and am wanting client-side processing of incremental updates to said form, since round-tripping adds considerable delay to the user experience. I'm sending the form as a table with appropriate athena:handler defined. On a mouse click, the athena:handler replaces the <span> containing the text with an <input type="text" /> or other control as appropriate. What I'm then trying to do is hook up an event handler to onBlur (or whatever) to compare the old and new values, set a dirty flag and enable the "save" button. I couldn't find a way to do this with the Divmod.NotQuiteMochiKit packages (indeed, they seem wedded to innerHTML), so I whacked MochiKit in the page header and tried this: class Frag(athena.LiveFragment): jsModule = u"db.Record" docFactory = loaders.stan( T.table(render=T.directive('sequence'), data=T.directive('sql'))[ T.tr(pattern='item', render=T.directive('mapping'))[ T.td[T.slot(name='fieldName')], T.td[ athena.handler(event='onclick', handler='editField'), T.span[T.slot(name='fieldValue')], ], # end of td ], # end of tr ]) ...and the jsmodule has: db.Record.methods( function editField(self, node, event) { if (node.inEdit) return false; /* make the textbox */ var tb = INPUT({'type': 'text', 'value': scrapeText(node)}); /* swap the span for a textbox */ replaceChildNodes( getElementsByTagAndClassName('span', null, node)[0], tb ); /* THIS FAILS */ connect(tb, 'onblur', self.saveField); return false; }); The nevow debug console thing logs "self has no properties" - what is self in this context of a widget method/event call? Why does it have no properties? Absent a more complete set of DOM and event handling functions, and given whatever the (to me) unfathomable incompatibility with Mochi and the Divmod runtime is, how does one attach event handlers to client-side created DOM nodes? Are the events normalised cross-browser as they are in Mochi? There's an "xbevent" function in one of the examples that indicates not? Suggestions welcome. Sorry for abruptness of mail, workrave is nagging me to stop typing...

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_win32stdio
by Manlio Perillo 29 Sep '06

29 Sep '06

Just to know: who wrote this module? On my system it simply does not works... I don't understand why you do not use the Console API. There are specific reasons for why _win32stdio should be attached at something else that is not a Console Handle? Thanks and regards Manlio Perillo

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Re: [Twisted-web] [Nevow] how to generate XHMTL without whitespaces
by Samuel Reynolds 27 Sep '06

27 Sep '06

At 04:56 PM 9/26/2006, you wrote: >Phil Mayers ha scritto: > > Manlio Perillo wrote: > >> > >> this template: > >> > >> <label>label: > >> <select name="a_name" n:render="sequence" > >> n:data="a_list"> > >> <option n:pattern="item"> > >> <n:invisible n:render="string" n:data="0" /> > >> <n:attr name="label" n:render="string" n:data="1" /> > >> </option> > >> </select> > >> </label> > > > >> gives a: > >> > >> <label>label: > >> <select name="a_name"><option label="a_label"> > >> > >> 1 > >> > >> </option><option label="another_label"> > > > > Erm - yes. Because your template has whitespace in it. Remove it and it > > should work - that is: > > > > <label>label:<select name="a_name" n:render="sequence" > > n:data="a_list"><option n:pattern="item">... > > > > > > >Ok, but I would like to have a readable template... >This is the reason why I'm asking if it is possible to remove extra Maybe do a simple regex cleanup before you use the template. Something like the following, which removes whitespace between > and <, if the whitespace begins with a newline: import re ... RE_removeFreeWhitespace = re.compile( r'>[\n\r]+\s*<' ) def removeFreeWhitespace( S ): return RE_removeFreeWhitespace.sub( r'><', S ) ... templateString = removeFreeWhitespace( templateString ) - Sam

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[Nevow] how to generate XHMTL without whitespaces
by Manlio Perillo 26 Sep '06

26 Sep '06

Hi. Is it possible (and how) to generate XHTML documents without extra whitespaces? Thanks Manlio Perillo

3 7

problems with Trac
by Manlio Perillo 22 Sep '06

22 Sep '06

Maybe I should report this to the web site maintainer... There is a problem with Trac on http://twistedmatrix.com/trac Traceback (most recent call last): File "/home/trac/Projects/trac/trunk/trac/web/main.py", line 356, in dispatch_request dispatcher.dispatch(req) File "/home/trac/Projects/trac/trunk/trac/web/main.py", line 190, in dispatch req.perm = PermissionCache(self.env, req.authname) File "/home/trac/Projects/trac/trunk/trac/perm.py", line 267, in __init__ self.perms = PermissionSystem(env).get_user_permissions(username) File "/home/trac/Projects/trac/trunk/trac/perm.py", line 231, in get_user_permissions for perm in self.store.get_user_permissions(username): File "/home/trac/Projects/trac/trunk/trac/perm.py", line 111, in get_user_permissions cursor.execute("SELECT username,action FROM permission") File "/home/trac/Projects/trac/trunk/trac/db/util.py", line 48, in execute return self.cursor.execute(sql) File "/home/trac/Projects/trac/trunk/trac/db/sqlite_backend.py", line 56, in execute args or []) File "/home/trac/Projects/trac/trunk/trac/db/sqlite_backend.py", line 48, in _rollback_on_error return function(self, *args, **kwargs) OperationalError: database is locked Regards Manlio Perillo

2 1

Web2: What is to be Done
by glyph＠divmod.com 15 Sep '06

15 Sep '06

Itamar and I have just created a few new tickets and the "Web2-Gold-Master" milestone for the ascension of web2 to the status of The Web Server For Twisted. Obviously I'll also have to get in my car and cast the original twisted.web back into the volcano where I originally forged it, but I still visit my parents' house pretty regularly so I don't think that should be a problem. Details are here: http://twistedmatrix.com/trac/ticket/2085 Please read this description, and create / mark any tickets with the appropriate milestone if you believe they are a requirement for this objective. We may not agree, but we'd appreciate community involvement. In particular, this is a favorite topic of discussion for pundits. I have heard many times that our web server situation is why Twisted is not as popular as Linux, or Quake, or Ruby on Rails, or MVS, or BitchX, or whatever today's infrastructure flavor of the month is. I've had to shrug and admit fault in the past, but now that there is a concrete list of tasks for you all to help out with, I sincerely hope that some of you will choose to do so.

7 17

twisted.web2 and blank values in POST
by Sylvain Thénault 13 Sep '06

13 Sep '06

Hi there, I've found a strange behaviour in twisted web2'server : the behaviour with blank values in form parameters is not consistent between GET and POST: on GET blank values are kept while this is not the case on POST. I'ld have expected blank values to be kept on POST as well. Is this a bug or an expected behavour ? PS: if this is a bug, an easy fix is to add keep_blank_values=True to the fileupload.parse_urlencoded call in server.py line 91. -- Sylvain Thénault LOGILAB, Paris (France) Formations Python, Zope, Plone, Debian: http://www.logilab.fr/formations Développement logiciel sur mesure: http://www.logilab.fr/services Python et calcul scientifique: http://www.logilab.fr/science

1 0

[Nevow] json serializer and strings
by Manlio Perillo 10 Sep '06

10 Sep '06

Hi. Why the json serializer does not support plain strings? I'm having problems because I want to serialize keywords arguments and the dictionary keys are str objects, not unicode. There are some problems with this: elif isinstance(obj, str): w('"') w(stringEncode(obj.decode("us-ascii")) w('"') ? I can use simplejson, but I don't want to add too many dependencies. Thanks Manlio Perillo

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