Mailman 3 July 2006 - Twisted-web

simple sample problem
by Alex Greif 31 Jul '06

31 Jul '06

just installed twisted 2.2.0 and web2 0.1.0 and tried the sample at: http://twistedmatrix.com/projects/web2/documentation/howto/intro.html but get the following exception: Failed to load application: cannot import name channel Is the sample old, or the 0.1.0 release outdated? Alex.

1 0

Re: [Twisted-web] [Nevow] JavaScript code
by Werner Thie 31 Jul '06

31 Jul '06

Hi all May I chime in with a question as a newbie? I get the feeling from this particular thread that I am completely on the wrong course with my experiments ( http://telinfo.thie.ch ) on hooking together my Swiss telephonebook library with a 'live' app in the browser window. Mainly because I am using nevow 0.8, MochiKit 1.3.1 and athena for the implementation (Safari was never considered to work with this code, although it would be nice to have it on board). If I am wrong in mixing these components, could someone please advise what I am supposed to change in my code for not getting some nasty surprises in the future when there are updates to nevow? I like the TechnoTurkeys adventures a lot and would like to provide some help although I doubt that I have enough knowledge to help out with more than some light testing. Thxs, Werner Thie Experience is what you get, when you expected something else. Server side code of telinfo.thie.ch attached for reference --------------------------------------------------------------- # telinfoweb.py - web service functionality test of the PYTHON telinfo package # # author : wthie, wth # last edit: 22.05.2005 # modhistory: # 28.04.2005 - wth, created # 22.05.2005 - wth, fiddled with result and status delivery, could do a whole # lot more, but we leave it at that for the moment import sys import os import simple_json if '2.3' in sys.version: path = os.path.abspath('./python23/telinfo') if '2.4' in sys.version: path = os.path.abspath('./python24/telinfo') sys.path.append(path) import telinfo tcdpath = 'C:\\Program Files\\telcd\\teldata\\data' verz = telinfo.SM_TELVERZ | telinfo.SM_PRIVAT | telinfo.SM_PROF from zope.interface import implements, Interface from twisted.python.components import registerAdapter from nevow import athena, inevow, loaders, tags, util, static class ITelinfoweb(Interface): def Search(): pass def SearchExtended(): pass class Telinfoweb(object): def __init__(self): self.limit = 15 self.result = '' def DoSearchPattern(self, pb, pattern): pat = pattern.replace(u'\xf6', 'o') pat = pat.replace(u'\xfc', 'u') pat = pat.replace(u'\xe4', 'a') pat = pat.replace(u'\xef', 'i') pat = pat.replace(u'\xe7', 'c') pat = pat.replace(u'\xe8', 'e') pat = pat.replace(u'\xe9', 'e') srchpat = pat.split('%') for i in range(0, len(srchpat)-1, 2): tagname = srchpat[i] spat = srchpat[i+1] if (len(spat) > 0): tag = telinfo.ILLEGAL_SEARCH if (tagname == 'name'): tag = telinfo.NAMESEARCH elif (tagname == 'vorname'): tag = telinfo.FNAMESEARCH elif (tagname == 'strasse'): tag = telinfo.STREETSEARCH elif (tagname == 'ort'): tag = telinfo.ORTSEARCH elif (tagname == 'beruf'): tag = telinfo.BERUFSEARCH elif (tagname == 'ledig'): tag = telinfo.LEDIGSEARCH elif (tagname == 'zusatz'): tag = telinfo.ZUSATZSEARCH if (tag != telinfo.ILLEGAL_SEARCH): pb.Search(tag, spat) return def BuildResult(self, pb): cnt = pb.GetElemCount() d = {} d['count'] = str(cnt) d['limit'] = str(self.limit) d['columns'] = ['rvorname', 'rname', 'rstrasse', 'rnr', 'rtelno', 'rplz', 'rort' ] d['rows'] = [] if cnt > 0: if cnt > self.limit: #limited to some value cnt = self.limit i = 0 while (i < cnt): row = [] row.append(unicode(pb.RetrieveField(i, telinfo.VORNAMETAG), 'iso-8859-1')) row.append(unicode(pb.RetrieveField(i, telinfo.NAMETAG), 'iso-8859-1')) row.append(unicode(pb.RetrieveField(i, telinfo.STRASSETAG), 'iso-8859-1')) row.append(unicode(pb.RetrieveField(i, telinfo.HAUSNUMMERTAG), 'iso-8859-1')) row.append(unicode(pb.RetrieveField(i, telinfo.RUFNUMMERTAG), 'iso-8859-1')) row.append(unicode(pb.RetrieveField(i, telinfo.PLZTAG), 'iso-8859-1')) row.append(unicode(pb.RetrieveField(i, telinfo.ORTTAG), 'iso-8859-1')) d['rows'].append(row) i = i + 1 pb.DropAll() return unicode(simple_json.dumps(d)) def Search(self, pattern): pb = telinfo.pypbdb(tcdpath, tcdpath, 20, 0) pb.OpenSearchSimple(0, verz, '') self.DoSearchPattern(pb, pattern) pb.CloseSearch() return self.BuildResult(pb) def SearchExtended(self, pattern): pb = telinfo.pypbdb(tcdpath, tcdpath, 20, 0) pb.OpenSearchSimple(1, verz, '') self.DoSearchPattern(pb, pattern) pb.CloseSearch() return self.BuildResult(pb) class TelinfowebResource(athena.LivePage): """ telinfo in its web incarnation All buttons presses in the browser are sent to the server. The server evaluates the expression and sets the output in the browser. """ addSlash = True #child_html = static.File('html') #this trick did not work out with topstyles preview feature #will contact the author about that problem child_images = static.File('images') child_scripts = static.File('scripts') child_css = static.File('css') docFactory = loaders.xmlfile(util.resource_filename('telinfoweb', 'html/telinfoweb.html')) if __name__ == '__main__': if True: from twisted.internet import reactor from twisted.python import log from nevow import appserver def TelinfowebResourceFactory(original): return TelinfowebResource(ITelinfoweb, original) registerAdapter(TelinfowebResourceFactory, Telinfoweb, inevow.IResource) log.startLogging(sys.stdout) site = appserver.NevowSite(Telinfoweb()) reactor.listenTCP(80, site) reactor.run() else: tstpb = Telinfoweb() tstpb.SearchExtended('name%Thie%vorname%W*%')

1 0

[Nevow] nestedsequence renderer
by Manlio Perillo 29 Jul '06

29 Jul '06

Hi. As suggested in a previous post, here is a (hopefully) reusable nestedsequence renderer, for those who cannot use a hierarchical data structure (like dictionary). class IData(Interface): # XXX choose a better name pass class ShinDataFactory(object): # replacement for rend.DataFactory, to be used as a mixin # XXX Is it possible to patch the default implementation? XXX implements(inevow.IContainer) def child(self, context, n): args = [] if n.find(' ') != -1: name, args = n.split(None, 1) args = [arg.strip() for arg in args.split(',')] else: name = n # we need to remember the last data directive name context.remember(name, IData) callable = getattr(self, 'data_%s' % name, None) ## If this page doesn't have an appropriate data_* method... if callable is None: ## See if our self.original has an IContainer... container = inevow.IContainer(self.original, None) if container is None: raise DataNotFoundError("The data named %r was not found in %r." % (name, self)) else: ## And delegate to it if so. return container.child(context, n) if args: return callable(*args) return callable def render_nestedsequence(self, context, data): name = context.locate(IData) nested_name = "nested_data_%s" % name # XXX not sure, check for nested_nested_data #context.remember(nested_name, IData) callable = getattr(self, nested_name, None) if callable is not None: data = callable(context, data) else: # XXX Not sure raise rend.DataNotFoundError("The nested data named %r was not found in %r." % (name, self)) tag = context.tag headers = tag.allPatterns("header") pattern = tag.patternGenerator("item") divider = tag.patternGenerator("divider", default=tags.invisible) content = [ (pattern(data=element), divider(data=element)) for element in data ] if not content: content = tag.allPatterns("empty") else: ## No divider after the last thing. content[-1] = content[-1][0] footers = tag.allPatterns("footer") return tag.clear()[ headers, content, footers ] Here is an example: class Main(ShinDataFactory, rend.Page): addSlash = True docFactory = loaders.xmlfile("nestedsequence.xhtml") def data_control_list(self, ctx, data): return [('a', "first"), ('b', "second")] def nested_data_control_list(self, ctx, data): print "nested_data_control_list", data return [('1', "uno"), ('2', "due")] def render_control(self, ctx, data): ctx.fillSlots("ctrl_label", data[1]) ctx.fillSlots("ctrl_name", data[0]) return ctx.tag def render_option(self, ctx, data): ctx.fillSlots("opt_label", data[1]) ctx.fillSlots("opt_value", data[0]) return ctx <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xmlns:n="http://nevow.com/ns/nevow/0.1" lang="it" xml:lang="it"> <head> <title>Nested sequence</title> </head> <body> <form action="post" method="post"> <ul n:render="sequence" n:data="control_list"> <li n:pattern="item" n:render="control"> <label><n:slot name="ctrl_label"/> <select n:render="nestedsequence"> <n:attr name="name"><n:slot name="ctrl_name" /></n:attr> <option n:pattern="item" n:render="option"> <n:attr name="value"><n:slot name="opt_value" /></n:attr> <n:slot name="opt_label" /> </option> </select> </label> </li> </ul> <input type="submit" value="send" /> </form> </body> </html> Any suggestions? Thanks Manlio Perillo

1 0

updates to documentation
by Manlio Perillo 29 Jul '06

29 Jul '06

Hi. I have added two patches for the documentation: #1355 and #1356. I also have updated my private branch: http://svn.python.it/twisted/trunk/contrib/nevow/doc/txt/ I have added some placeholders, an update (not yet ready for a patch): http://svn.python.it/twisted/trunk/contrib/nevow/doc/txt/nevow-deployment.t… and a draft for a new chapter: http://svn.python.it/twisted/trunk/contrib/nevow/doc/txt/nevow-rendering-ba… (plus a small update to nevow-sessions). I'm planning to update the nevow-rendering chapter with some images that will show how rendering machinery works. Manlio Perillo

1 0

[Nevow] inevow.IQ
by Manlio Perillo 25 Jul '06

25 Jul '06

Hi. In the interface IQ there is a keyed method but it seems that this is not implemented. What about it? It is documented also in stan.py (where there are some other special stuff like remember). By the way: what's the difference, say, beetwen ctx.fillSlots(...) and inevow.IQ(ctx).fillSlots(...) ? Thanks Manlio Perillo

2 2

[Nevow] changing the attributes of a node
by Manlio Perillo 25 Jul '06

25 Jul '06

Hi. I need to set/unset an attribute (checked) on a <input type="checkbox"> element (in a xml template). I'm using IQ.onePattern, but the problem is that the node is "removed" from the "stan context". Now I'm doing this from my render function: checked = ctx.tag.onePattern("checked") ... some fillSlots ... if ...: checked.attributes["checked"] = "true" ctx.tag.children[-1] = tags.td[checked]["label"] return ctx.tag (the checkbox is inside a table). There is a way to insert the node in its original place? Or (if this make sense), to manipulate it "in place"? Thanks and regards Manlio Perillo

2 2

fork to Nevow documentation
by Manlio Perillo 21 Jul '06

21 Jul '06

Hi. I have forked the Nevow documentation: http://svn.python.it/twisted/trunk/contrib/nevow/doc/ Since I'm using Nevow for a project, I will try to document as many things as I can. Manlio Perillo

6 12

problems with online api documentation for inevow
by Manlio Perillo 21 Jul '06

21 Jul '06

I think this is a know problem, but in http://divmod.org/users/exarkun/nevow-api/public/nevow.inevow-module.html there is nothing... Thanks and regards Manlio Perillo

3 3

authentication on SSL
by Manlio Perillo 19 Jul '06

19 Jul '06

Hi. I would like to login users on a SSL protected page (using SSL only for login). Is this possible with guard? P.S. I have seen a new guard implementation on Valentino's dialbox. Is it mature? Thanks Manlio Perillo

3 3

Re: [Twisted-Python] again on nested sequence
by Manlio Perillo 18 Jul '06

18 Jul '06

Manlio Perillo ha scritto: > Valentino Volonghi aka Dialtone ha scritto: >> >> On Sun, 16 Jul 2006 16:18:07 -0200, Manlio Perillo >> <manlio_perillo(a)libero.it> wrote: >> >> This is off topic here... Twisted-web is the list. I have Cc to twisted-web, hoping this will help the archiving. > Just for future reference, here is an alternate solution. It contains more code, but it is more database friendly (and I like this - better performance too?). It also contains some correction for the HTML code. <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xmlns:n="http://nevow.com/ns/nevow/0.1" lang="it" xml:lang="it"> <head> <title>Nested sequence II</title> </head> <body> <form action="post" method="post"> <ul n:render="sequence" n:data="control_list"> <li n:pattern="item" n:render="control"> <label><n:slot name="ctrl_label"/> <select n:render="option_list"> <n:attr name="name"><n:slot name="ctrl_name" /></n:attr> <option n:pattern="item" n:render="option"> <n:attr name="value"><n:slot name="opt_value" /></n:attr> <n:slot name="opt_label" /> </option> </select> </label> </li> </ul> <input type="submit" value="send" /> </form> </body> </html> class Main(rend.Page): addSlash = True docFactory = loaders.xmlfile('nestedsequence.xhtml') def data_control_list(self, ctx, data): return [('a', 'first'), ('b', 'second')] def render_option_list(self, ctx, data): option_list = [('1', 'uno'), ('2', 'due')] tag = ctx.tag pattern = inevow.IQ(ctx).patternGenerator("item") content = [pattern(data=option) for option in option_list] return ctx.tag.clear()[content] def render_control(self, ctx, data): print '*', data ctx.fillSlots('ctrl_label', data[1]) ctx.fillSlots('ctrl_name', data[0]) return ctx.tag def render_option(self, ctx, data): ctx.fillSlots('opt_label', data[1]) ctx.fillSlots('opt_value', data[0]) return ctx Maybe it is not reusable as the previous solution, but it's not a problem. Regards Manlio Perillo

3 10