Mailman 3 July 2003 - Twisted

[Twisted-Python] Custom DNS server
by rudy.schockaert＠pandora.be July 24, 2003

July 24, 2003

Hi, I need a DNS server that forwards all queries except for some predefined maildomains. For these domains a record pointing to a central mailrelay should be returned instead of the record that is present in Internet DNS. Is this possible/difficult to do with Twisted? How should I interpret the 'unstable' in the twisted.names documentation? TIA, Rudy

4 4

[Twisted-Python] Pretty printing in Woven
by Alex Levy July 23, 2003

July 23, 2003

Attached is a diff for pretty-printing HTML in Woven. I removed strip=1 from microdom.toprettyxml because it was senselessly munging whitespace; I couldn't think of a good reason to keep this in, since dumping out huge blocks of text in a single line never makes readable code. The rest of it works, but others may have better ideas for how to do this. Index: twisted/web/microdom.py =================================================================== RCS file: /cvs/Twisted/twisted/web/microdom.… [View More]py,v retrieving revision 1.95 diff -u -r1.95 microdom.py --- twisted/web/microdom.py 19 Jul 2003 02:09:50 -0000 1.95 +++ twisted/web/microdom.py 22 Jul 2003 04:17:56 -0000 @@ -137,10 +137,10 @@ rv = s.getvalue() return rv - def writeprettyxml(self, stream, indent='', addindent=' ', newl='\n', strip=1): + def writeprettyxml(self, stream, indent='', addindent=' ', newl='\n', strip=0): return self.writexml(stream, indent, addindent, newl, strip) - def toprettyxml(self, indent='', addindent=' ', newl='\n', strip=1): + def toprettyxml(self, indent='', addindent=' ', newl='\n', strip=0): return self.toxml(indent, addindent, newl, strip) def cloneNode(self, deep=0, parent=None): @@ -477,6 +477,13 @@ ALLOWSINGLETON = ('img', 'br', 'hr', 'base', 'meta', 'link', 'param', 'area', 'input', 'col', 'basefont', 'isindex', 'frame') + BLOCKELEMENTS = ('html', 'head', 'body', 'noscript', 'ins', 'del', + 'h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'script', + 'ul', 'ol', 'dl', 'pre', 'hr', 'blockquote', + 'address', 'p', 'div', 'fieldset', 'table', 'tr', + 'form', 'object', 'fieldset', 'applet', 'map') + FORMATNICELY = ('tr', 'ul', 'ol', 'head') + # this should never be necessary unless people start # changing .tagName on the fly(?) if not self.preserveCase: @@ -487,8 +494,11 @@ for ns in nsprefixes.keys(): del newprefixes[ns] else: - newprefixes = {} - begin = [newl, indent, '<'] + newprefixes = {} + + begin = ['<'] + if self.tagName in BLOCKELEMENTS: + begin = [newl, indent] + begin bext = begin.extend writeattr = lambda _atr, _val: bext((' ', _atr, '="', escape(_val), '"')) if namespace != self.namespace: @@ -525,8 +535,14 @@ w(">") newindent = indent + addindent for child in self.childNodes: + if self.tagName in BLOCKELEMENTS and \ + self.tagName in FORMATNICELY: + w(j((newl, newindent))) child.writexml(stream, newindent, addindent, newl, strip, downprefixes, self.namespace) - w(j((newl, indent, "</", self.endTagName, '>'))) + if self.tagName in BLOCKELEMENTS: + w(j((newl, indent))) + w(j(("</", self.endTagName, '>'))) + elif self.tagName.lower() not in ALLOWSINGLETON: w(j(('></', self.endTagName, '>'))) else: Index: twisted/web/woven/utils.py =================================================================== RCS file: /cvs/Twisted/twisted/web/woven/utils.py,v retrieving revision 1.14 diff -u -r1.14 utils.py --- twisted/web/woven/utils.py 13 May 2003 00:57:18 -0000 1.14 +++ twisted/web/woven/utils.py 22 Jul 2003 04:17:56 -0000 @@ -15,7 +15,7 @@ def doSendPage(self, d, request): - page = str(d.toxml()) + page = str(d.toprettyxml()) request.setHeader('content-length', str(len(page))) request.write(page) request.finish() -- Alex Levy WWW: http://mesozoic.geecs.org "Never let your sense of morals prevent you from doing what is right." -- Salvor Hardin, Isaac Asimov's _Foundation_ [View Less]

4 4

[Twisted-Python] another woven question
by Justin Johnson July 22, 2003

July 22, 2003

I have a file index.html that has a table with sections for a menu, header, footer, and body. I want the contents of each section to come from its own template file. Since I want them to come from a template file, it seems to me that I would subclass Page which has templateFile and templateDirectory attributes, but I'm not sure how to insert the contents into the index.html file. I coded the attached index.rpy and index.html, which I'm pretty sure is incorrect, but it *does* insert the *… [View More]

2 2

[Twisted-Python] quick factory question
by Greg Fortune July 22, 2003

July 22, 2003

Factories produce instances of protocols, correct? And if I've created a single instance of a factory, I shouldn't have to worry about the app spawning more factories for any reason, correct? I ask because I am holding some global mutex info in my factory that changes the behavior of the protocol instances and if multiple factories were running at any given time, I could have some huge concurency problems... On a related note, I've noticed that twisted uses naming similar to that of … [View More]

2 2

[Twisted-Python] t.w.w.form maybe bug?
by Alessandro Praduroux July 22, 2003

July 22, 2003

Hello, I am trying to create a page with a list of elements that can be possibly edited by the user, along with a form to edit the elements or insert new ones. So, I setup the things as follows: class Test(page.Page) template = """ <html> <head></head> <body> <table border="1" cellpadding="2" width="80%" model="configs" view="List"> <tr pattern="listHeader"><th> </th><th>Nome</th><th>Limiti… [View More]</th><th>Bilanciamento</th></tr> <tr pattern="listItem" view="conf"></tr> </table> <div><form method="POST" action="/balancing/edit" model="editform"></form></div> </body> </html> """ def wmfactory_configs(self, request): cf = libra.RouteConfig() return cf.configurations() def wmfactory_editform(self, request): return self._form def wchild_edit(self, request): fp = form.FormProcessor(self._form, callback=lambda x: util.Redirect("/balancing")) fp.mangle_timein = fp.mangle_multi return fp def wvupdate_conf(self, request, node, data): r = microdom.lmx(node) d = r.td() d.a(href="/balancing/?action=edit&cfg=%s"%data[0]).text("Modifica") d.br() d.a(href="/balancing/?action=delete&cfg=%s"%data[0]).text("Elimina") r.td().text(data[0]) ((h0,m0,s0),(h1,m1,s1)) = data[1]["limit"] r.td().text("dalle %02d:%02d:%02d alle %02d:%02d:%02d"%(h0,m0,s0,h1,m1,s1)) bl = ["%s: %d%%"%(k,v) for (k,v) in data[1]["weights"]] d = r.td() for l in bl: d.text(l) d.br() def setUp(self, request, d): self._action = request.args.get("action",[""])[0] if self._action == "delete": cf = libra.RouteConfig() cf.delCfg(request.args.get("cfg",[""])[0]) cf.save() if self._action == "edit": cf = libra.RouteConfig() c = cf.getCfg(request.args.get("cfg",[""])[0]) args = [ fm.Hidden("action","edit"), lw.Static("Nome",request.args.get("cfg",[""])[0]), lw.Static("Dalle","%02d:%02d%02d"%c['limit'][0]), lw.Static("Alle","%02d:%02d%02d"%c['limit'][1]), ] for (k,v) in c["weights"]: args.append(fm.String(k, str(v))) cfs = fm.MethodSignature(*args) self._form = cfs.method(self.processEdit) else: cfs = fm.MethodSignature( fm.Hidden("action","new"), fm.String("Nome"), lw.Timein("Dalle",(00,00,00)), lw.Timein("Alle",(23,59,59)) ) self._form = cfs.method(self.processEdit) def processEdit(self,**kw): if kw["action"] == "new": print "new", kw else: print "edit", kw one thing to notice: the page is not part of an .rpy, but it's added as child of the root page using putChild The first time the page is rendered, i get the form I espect (the second one defined in setUp). If I follow a link that should end up with the first form displayed, nothing happens (better, I am presented with the same form again and again). digging into t.w.w.form.FormFillerWidget, I notice the following (around line 280): argList = self.model.fmethod.getArgs() That means the widget is rendered using the model it was built with, not the model that is passed in setUp(self, request, node, data) Now the questions: 1. I am doing things really wrong here? 2. the fact that the render-time model is completely ignored is by design or a bug? 3. would changing the line above to read "argList = data.getArgs()" really solve the issue (here it seems to work) or it will introduce some subtle bugs I'm not aware of? Thanks in advance for the help -- Linux webmaster & sysadmin pradu(a)pradu.it [View Less]

1 0

[Twisted-Python] Fw: [assemblee] [ANN] WebTK v0.alpha3
by Xavier Antoviaque July 22, 2003

July 22, 2003

Hello, I saw Moshe Zadka at the EuroPython, who said me to drop a word about WebTK here. So, I forward you the announcement for the alpha3 version. Thanks for the quality of your work on Twisted, guys. Begin forwarded message: Date: Tue, 22 Jul 2003 17:39:41 +0200 From: Xavier Antoviaque <xavier(a)plebia.org> To: python-announce(a)python.org Cc: assemblee(a)plebia.org Subject: [assemblee] [ANN] WebTK v0.alpha3 ================= WebTK v0.alpha3 ================= Find a new … [View More]alpha-release of WebTK: http://www.webtk.org/ It includes a brand new data model (featuring data events!), a Forum application and a refactored module architecture. The examples below have been updated to reflect changes. What is WebTK ? =============== WebTK is a Python framework, using Twisted as its underlying Web server, and allowing webmasters to develop websites like any classic GUI software. It is object-oriented, providing and handling event-based widgets. It also does not need any database to work, as it uses objects persitance, with the help of PyPerSyst. Disclaimer ========== Please note that the alpha series are mainly for developers that want to have a look at WebTK internals - there are plenty of bugs, dirty tricks and the installation is not easy. This is NOT for production websites. URLs ==== You can find more about WebTK here : Homepage : http://www.webtk.org/ Download : http://www.webtk.org/download/ Web CVS : http://cvs.plebia.org/index.py/?cvsroot=webtk Current API : http://www.webtk.org/doc/current/api/ Changelog : http://www.webtk.org/Changelog Examples ======== To give you some idea of what WebTK is, here is some small sample websites, working with the alpha3 version. It shows an image whose content change each time you click on it: # Modules ################################################################# import sys from webtk.core.system import Session from webtk.widget.window import RootWindow from webtk.widget.display import Pixmap # Classes ################################################################# class MySession(Session): def init(self): window = RootWindow(wtkTitle='WebTK Test') self.wtkAddRootObject(window) image = PlebiaPlonePixmap() window.wtkAppendChild(image) class PlebiaPlonePixmap(Pixmap): def init(self): self.ploneURI = 'http://plone.org/logo.jpg' self.plebiaURI = 'http://www.plebia.org/images/logo.png' self.wtkURI = self.plebiaURI self.wtkAddEvent('click', self.onClick) def onClick(self): if self.wtkURI == self.plebiaURI: self.wtkURI = self.ploneURI else: self.wtkURI = self.plebiaURI Here is a slighlty more elaborated one, which uses a Poll widget to ask the visitor an important question ! # Modules ################################################################# import sys from webtk.core.system import Session from webtk.widget.window import RootWindow from webtk.widget.app.poll import Poll, PollResult from webtk.data.base import Data # Classes ################################################################# class MySession(Session): def init(self): # Poll window = RootWindow(wtkTitle='WebTK Test Poll') self.wtkAddRootObject(window) pollData = self.wtkSystem.wtkPoolGet('poll') if pollData is None: pollData = self.wtkSystem.wtkPoolRegister('poll', Data) question = Data() question.wtkTitle = 'Do you like WebTK ?' for ans in ['Yes, sure.', 'Mmmh, I do not know.', 'Bah!']: answer = Data() answer.wtkTitle = ans answer.wtkNbVotes = 0 question.wtkAppendChild(answer) pollData.wtkAppendChild(question) question = Data() question.wtkTitle = 'Will you use it ?' for ans in ['For all my future websites!', 'Perhaps...', 'Never!']: answer = Data() answer.wtkTitle = ans answer.wtkNbVotes = 0 question.wtkAppendChild(answer) pollData.wtkAppendChild(question) pollResult = PollResult(wtkPollData=pollData) pollResult.wtkIsVisible = 0 poll = TestPoll(wtkPollData=pollData, pollResult=pollResult) window.wtkAppendChild(poll) window.wtkAppendChild(pollResult) class TestPoll(Poll): def init(self, pollResult): self.pollResult = pollResult self.wtkAddEvent('onSelectAnswer', self.wtkCallbackOnSelectAnswer) def wtkCallbackOnSelectAnswer(self): self.pollResult.wtkIsVisible = 1 -- Xavier. --------------------------------------------------------------------- To unsubscribe, e-mail: assemblee-unsubscribe(a)plebia.org For additional commands, e-mail: assemblee-help(a)plebia.org -- Xavier. [View Less]

1 0

Re: [Twisted-Python] woven not replacing model/view tags
by Justin Johnson July 22, 2003

July 22, 2003

Never mind, I figured it out. There were 2 problems. 1) I had index.html and index.rpy sitting in the same directory, so index.html was being picked up first, and of course rendering the way it should for a .html file. 2) Once I referenced index.rpy directly I found my html was not correct, not having all the necessary double quotes around attribute values and missing some tailing />'s for my tags. -Justin On Tue, 22 Jul 2003 07:11:27 -0600, "Justin Johnson" <justinjohnson(a)… [View More]

1 0

[Twisted-Python] woven not replacing model/view tags
by Justin Johnson July 22, 2003

July 22, 2003

Hi, I'm trying out woven, but my tags that include model and view attributes aren't being replaced as I would expect them to. I've attached index.rpy and index.html, which are the only files from the code that are being used at this point. I'm running them with the following... mktap web --path C:\share\woven\site twistd -nf web.tap It starts up fine and renders the html of index.html just fine, but my tags are replaced, and the title is set to the actual tag (i.e. everything I placed … [View More]

1 0

[Twisted-Python] twisted.web with IIS
by Achim Domma (ProCoders) July 22, 2003

July 22, 2003

Hi, I have to develop a small app on Win2K with IIS. I want to use twisted.web, but it seems like IIS has nothing like ProxyPass. Does anybody know a simple solution to let twisted.web run behind IIS? regards, Achim

2 2

[Twisted-Python] Explicit disconnect from pb
by Uwe C. Schroeder July 22, 2003

July 22, 2003

Hi, I looked qround, but I can't find any information on how to disconnect from a pb session without ending the client. I have a service which I'm connecting to. Some time later I want to disconnect from this service to free up ressources ( the service keeps database connections etc, and I want to get rid of them ). The only thing I have on the client side is a remotereference to the perspective instance. So how do I disconnect from something I don't have a reference to ? Somehow there … [View More]

4 5