Mailman 3 November 2003 - Twisted

[Twisted-Python] LivePage patch? - was (LivePage CACHING Problem)
by Justin Johnson 17 Nov '03

17 Nov '03

Working with fzZzy on #divmod, I made the following change to my local twisted/web/woven/flashconduit.py to make LivePage work for me. I'm using guard sessions (which appear to not be supported by the current code) so in my case the sessions are stored on the SessionWrapper. I really don't know squat about the way the code should be, so hopefully someone else can take a look at this and apply a real patch. I'd gladly do the real thing, but it would take me a *lot* longer to do. :-) Thanks. -Justin --- flashconduit.py.orig 2003-11-17 13:18:37.000000000 -0600 +++ flashconduit.py 2003-11-17 13:18:43.000000000 -0600 @@ -16,7 +16,8 @@ #self.lp.unhookOutputConduit() def lineReceived(self, line): - session = self.factory.site.getSession(line) + #session = self.factory.site.getSession(line) + session = self.factory.site.resource.sessions[line] self.lp = lp = session.getComponent(interfaces.IWovenLivePage) lp.hookupOutputConduit(self) ----- Original message ----- From: "Justin Johnson" <justinjohnson(a)fastmail.fm> To: "Twisted-Python" <twisted-python(a)twistedmatrix.com> Date: Thu, 13 Nov 2003 11:19:09 -0600 Subject: Re: [Twisted-Python] LivePage CACHING Problem I found the following post that looks similar to my problem. http://twistedmatrix.com/pipermail/twisted-python/2003-May/004170.html But since I have my own tap, I copied the code from web/tap.py into my code to start up the FlashConduitFactory. It starts up, but I get the following errors. Is this a bug? Any ideas what I'm doing wrong? 2003/11/13 11:08 CST [twisted.web.woven.flashconduit.FlashConduitFactory] connection with flash movie opened 2003/11/13 11:08 CST [FlashConduit,3,xxx.xxx.xxx.xxx] Traceback (most recent call last): File "/usr/local/lib/python2.3/site-packages/twisted/internet/default.py", line 501, in doSelect _logrun(selectable, _drdw, selectable, method, dict) File "/usr/local/lib/python2.3/site-packages/twisted/python/log.py", line 65, in callWithLogger callWithContext({"system": lp}, func, *args, **kw) File "/usr/local/lib/python2.3/site-packages/twisted/python/log.py", line 52, in callWithContext return context.call({ILogContext: newCtx}, func, *args, **kw) File "/usr/local/lib/python2.3/site-packages/twisted/python/context.py", line 32, in callWithContext return func(*args,**kw) --- <exception caught here> --- File "/usr/local/lib/python2.3/site-packages/twisted/internet/default.py", line 510, in _doReadOrWrite why = getattr(selectable, method)() File "/usr/local/lib/python2.3/site-packages/twisted/internet/tcp.py", line 250, in doRead return self.protocol.dataReceived(data) File "/usr/local/lib/python2.3/site-packages/twisted/protocols/basic.py", line 223, in dataReceived why = self.lineReceived(line) File "/usr/local/lib/python2.3/site-packages/twisted/web/woven/flashconduit.py", line 19, in lineReceived session = self.factory.site.getSession(line) File "/usr/local/lib/python2.3/site-packages/twisted/web/server.py", line 470, in getSession return self.sessions[uid] exceptions.KeyError: 'd01be6fe334cded345c0b029e29df7ac' 2003/11/13 11:08 CST [FlashConduit,3,xxx.xxx.xxx.xxx] connection lost On Thu, 13 Nov 2003 10:38:59 -0600, "Justin Johnson" <justinjohnson(a)fastmail.fm> said: > Hi, > > I am currently trying to use LivePage to update the cells of an html > table with results from processes initiated in various PB services. The > client intiates requests in the services and those services call back > into the client's (a pb.Referenceable) remote_updateStatus method to > update the table which displays the results. I have test code that > simulates this and everything works fine. Javascript is sent to the > browser to update the cells of the table. Works really slick. However, > now that I tried to hook it up to PB, the LivePage javascript sending > part isn't working. When I make the page.sendScript(script) call I get > the following in the log. > > 2003/11/13 10:25 CST [Broker,client] Sending javascript to page > <twisted.web.woven.utils.WovenLivePage instance at 0x4089944c> > 2003/11/13 10:25 CST [Broker,client] CACHING > [<twisted.web.woven.utils.Script instance at 0x4089906c>] > > All future sendScript calls append the script to the cache. Everything > else is working appropriately, and all code is executing as I'd expect, > except that the javascript doesn't send properly. Is there something in > particular I should be looking for here? I don't see what I'm doing > different, but since LivePage is quite magical to me I'm not sure where > to look. > > On a slightly different note, is there LivePage-ish support in nevow, and > do you recommend moving to that yet? > > Thanks. > -Justin > > _______________________________________________ > Twisted-Python mailing list > Twisted-Python(a)twistedmatrix.com > http://twistedmatrix.com/cgi-bin/mailman/listinfo/twisted-python _______________________________________________ Twisted-Python mailing list Twisted-Python(a)twistedmatrix.com http://twistedmatrix.com/cgi-bin/mailman/listinfo/twisted-python

1 0

[Twisted-Python] using defers with requests
by charles brandt 15 Nov '03

15 Nov '03

I am trying to select some data from a database in hopes of eventually using it to populate a dynamic page. Before I dive into woven, I was trying to get the following to print selected data directly to a html resource using the following code snippet (or various versions of it). I've only been able to get an empty page though ( <html><body></body></html> ). I'm wondering if maybe the request is getting returned before the callback makes it to the defer? Any ideas? Thanks in advance, -Charles. from twisted.web import resource, server from twisted.enterprise import adbapi dbpool = adbapi.ConnectionPool(<connection stuff>) def getData(data): return dbpool.runQuery("SELECT * FROM some_table WHERE some_column = %s", data) def printResult(data, request): request.write("pre-data") request.write(data) request.write("post-data") request.finish() class myResource(resource.Resource): def render(self, request): d = getData("some string") d.addCallback(printResult, request) return server.NOT_DONE_YET resource = myResource()

3 6

RE: [Twisted-Python] Forum vs. mailing list
by benjamin bruheim 15 Nov '03

15 Nov '03

>http://z.iwethey.org/forums -- we also have a hosting service. If you I liked those forums. Best of both worlds. It does have a slowness I attribute to Zope, and so on. I liked the mixed threads/flat-view that the forum uses. This is good for real discussion. And also, it allows one to browse faster. However, the CSS is IMHO lousy, and very unattractive. I think we could configure this better. If it is gets to be available on twisted, it would be good. However, I prefer to use lightweight systems; both in bandwidth and CPU. I hope this system is made to be scalable and accessible. You should put up an example setup, clean the CSS to the bare minimums. Put up a minimum of forums. I would think: Development, Twisted, Web Perhaps add: Issues (the workaround forum), Showroom (brag) and General Bullshit Sincerely, Benjamin Bruheim

2 1

[Twisted-Python] Re: [Plone-developers] [Ann] epoz 1.0 beta1 released
by robert 15 Nov '03

15 Nov '03

Philipp, thanks for your info and efforts. I am currently working on a Project using Plone 2.0 for which I need a visual editor. Since the project is due by the end of the year, I need to use a solution that is available by then. My question therefore is:what is the state of the plone integration? Is there something I could use to start with? I would very much like to help beta testing, but it must be in an Plone environment. Robert Am Freitag, 14. November 2003 16:27 schrieb Philipp von Weitershausen: > The epoz project is pleased to announce the first beta version of its > cross-browser visual HTML editor! > > Originally written by Maik Jablonski, the editor famous in the world of > Zope and Plone was completely redesigned by Paul Everitt (Zope Europe > Association) and Guido Wesdorp (Infrae) and Philipp von Weitershausen > (philiKON Valley). The result is a very flexible editing machine based > on the following concepts: > > - Integration > > epoz was designed to be highly integrable into target products. It > uses Zope Page Templates (ZPT) for the XHTML templating. ZPTs hide > templating instructions in XML namespaces. That way, all XHTML > templates in epoz remain valid XHTML documents and should be able > to be used in similar templating systems without modification. > That also means, epoz can directly be used off of the filesystem > or served by Apache, without any templating engine. > > - Document-centric and asynchronous editing > > Other in-browser editors simply provide a replacement for the > textarea element in XHTML forms. epoz instead focuses on > document-centric editing. It lets you edit the contents of an > XHTML document and dublin core metadata (Title, Creator etc.) in a > compact and standard-conformant way. Upon save, epoz constructs a > full-fledged XHTML document again and invokes a PUT request to the > server. Being a standard HTTP command, PUT requests can be served > by nearly any webserver, even Apache (with mod_dav)! > > - Customization and extensibility > > The looks of epoz can be modified without having to modify the > XHTML templates by simply customizing the Cascading Style > Sheets. Its JavaScript architecture has been modelled after the > MVC concept. That means you may customize large or small parts of > the editor without having to reimplement or subclass anything, but > it also means extending epoz's functionality is just as easy. > > Where can I get it? > > You may download a tarball at the the epoz project homepage at > Sourceforge: > > http://sourceforge.net/project/showfiles.php?group_id=84377 > > How can I use it? > > epoz comes with a great deal of documentation already. The > INSTALL.txt file in the 'doc' directory should provide a small set > of introductions for Zope users. > > If you would like to see epoz in action without having to install it > in Zope, you may either download the tarball and open > 'common/epozmacros.html' in your browser or visit the following URL > (served by Apache, btw): > > http://www.philikon.de/files/epoz/common/epozmacros.html > > If you happen to succeed at integrating epoz into your favourite web > application server, feel free to contact us if you would like to > contribute your code to the project. Equally, any documentation > about how to integrate, customize or extend are very welcome. > > What to expect for future releases > > - Link and image toolbox: > > The original Epoz editor provided a toolbox for Plone users that > was loaded in a browser pop-up window. Since epoz 1.0 puts a lot > of focus on document-centric editing, it places toolbox elements > such as a link or image browser and table creator right on the > edit page. Results for link and image searching will be loaded > asynchronously in a yet-to-defined XML format. > > In upcoming releases, we will provide asynronous server-side > methods for link and image searching in Zope2, CMF, Plone and > Zope3. > > - Plone integration: > > Although we have made an effort to integrate it with Plone > 1.0/2.0, we have seen that current versions of Plone does not > allow an editor to take over for document-centric editing. Philipp > has made a Plone Improvement Proposal (PLIP) to provide a visual > editing architecture in Plone > (http://plone.org/development/current/projects/PLIP5). The > proposal has been accepted by the community and Philipp is > currently implementing. It is expected that Plone 2.1 will be > ready to be plugged together with upcoming versions of epoz. > > How to report bugs? > > Please help us make epoz 1.0 bugfree and report bugs you encounter > at: > > http://codespeak.net/issues/epoz/ (mind the trailing slash) > > Further questions? Write us to: > > epoz-development(a)lists.sourceforge.net > > We are looking forward to your comments. > On behalf of the epoz project, > > Philipp von Weitershausen > > > > > ------------------------------------------------------- > This SF.Net email sponsored by: ApacheCon 2003, > 16-19 November in Las Vegas. Learn firsthand the latest > developments in Apache, PHP, Perl, XML, Java, MySQL, > WebDAV, and more! http://www.apachecon.com/ > _______________________________________________ > Plone-developers mailing list > Plone-developers(a)lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/plone-developers -- mit freundlichen Grüssen Robert Rottermann www.redCOR.ch

1 0

[Twisted-Python] Deferred model
by Philippe Lafoucrière 14 Nov '03

14 Nov '03

Hello Can someone provide me a good example of a deferred model in woven ? I have a big model to build, and the page takes a long time to render... I didn't find any help on twisted site :( thx for help -- Philippe

5 10

[Twisted-Python] Documentation Question
by Steven Bauer 14 Nov '03

14 Nov '03

Being new to twisted I may be lacking a clue, but finding the proper arguments to twisted.application.internet.UDPServer() was a major pain in the butt. Only by looking at the code could I find all the valid arguments and that took a lot of tracing because the valid arguments are determined by listenudp() it seems. Is their an easier way or is it always frustrating to determine the acceptable arguments to an init function? Thanks, Steve

5 5

[Twisted-Python] time and date
by Phil Christensen 13 Nov '03

13 Nov '03

i might just be insane, but is there something crazy going on with date stamps on this list? about three different messages in the past two days have weird time stamps on them, that are set in the past or the future. i noticed some stuff in the archives like that, too. is this an accidental user thing? or am i suffering from senile dementia exceptionally early in my life?

1 0

RE: [Twisted-Python] Deferred model
by Hegedus, Matthew S 13 Nov '03

13 Nov '03

Oops, sorry Chris, I did not see your response. My message will surely displease you. Please disregard since you have already made your case defending the Twisted archives and opposing a forum. Matthew -----Original Message----- From: Christopher Armstrong [mailto:radix@twistedmatrix.com] Sent: Thursday, November 13, 2003 4:04 PM To: twisted-python(a)twistedmatrix.com Subject: Re: [Twisted-Python] Deferred model On Thu, Nov 13, 2003 at 10:14:16PM +0100, Philippe Lafoucri?re wrote: > > > I'm sure this has been answered a million times before, but here > > goes... > > I'm sure too. But I proposed a long time ago (and several times) to > use a forum instead of a mailing list... This is a terrible excuse. Not only do we have our *own* archives: http://twistedmatrix.com/pipermail/twisted-python which, of course, are searchable via google: "deferred blocking code site:twistedmatrix.com" there are *multiple* archives elsewhere that have a built-in search functionality as well: http://marc.free.net.ph/list/twisted-python.html http://news.gmane.org/gmane.comp.python.twisted I found these with a trivial amount of googling: "twisted-python mailing list" Having searchable archives is obviously no reason to switch to a web forum (ugh), as we have that right now. > > If you give more detail about what you're trying to do, I'm sure one > > of the Twisted gurus can explain what the best approach(es) might > > be. > > I thought of using the setUp method of page. I can start the > calculation when the page loads, but I don't know what to call (in the > callback) when it's done (a wmfactory_xxx ?). I'll check the threading > part you gave me. Thank you ! Unfortunately, I don't think there's any special support in Woven to handle Deferreds from setUp. You can return Deferreds from wmfactory_XXX and Woven will handle them correctly: it will not finish rendering the page until that Deferred has fired and the model is ready. -- Twisted | Christopher Armstrong: International Man of Twistery Radix | Release Manager, Twisted Project ---------+ http://radix.twistedmatrix.com/ _______________________________________________ Twisted-Python mailing list Twisted-Python(a)twistedmatrix.com http://twistedmatrix.com/cgi-bin/mailman/listinfo/twisted-python

1 0

[Twisted-Python] adbapi.Augmention
by Jon Dyte 13 Nov '03

13 Nov '03

Hi the doc string of adbapi.Augmentation mentions just using the ConnectionPool directly. "A class which augments a database connector with some functionality. This class is now deprecated. Just use the ConnectionPool directly. Conventional usage of me is to write methods that look like..." Presumbably this means DONT inherit from ConnectionPool like you used to inherit from Augmentation( or am I reading that incorrectly) and just create a ConnectionPool instance and run the queries through that. Jon

3 3

[Twisted-Python] LivePage CACHING Problem
by Justin Johnson 13 Nov '03

13 Nov '03

Hi, I am currently trying to use LivePage to update the cells of an html table with results from processes initiated in various PB services. The client intiates requests in the services and those services call back into the client's (a pb.Referenceable) remote_updateStatus method to update the table which displays the results. I have test code that simulates this and everything works fine. Javascript is sent to the browser to update the cells of the table. Works really slick. However, now that I tried to hook it up to PB, the LivePage javascript sending part isn't working. When I make the page.sendScript(script) call I get the following in the log. 2003/11/13 10:25 CST [Broker,client] Sending javascript to page <twisted.web.woven.utils.WovenLivePage instance at 0x4089944c> 2003/11/13 10:25 CST [Broker,client] CACHING [<twisted.web.woven.utils.Script instance at 0x4089906c>] All future sendScript calls append the script to the cache. Everything else is working appropriately, and all code is executing as I'd expect, except that the javascript doesn't send properly. Is there something in particular I should be looking for here? I don't see what I'm doing different, but since LivePage is quite magical to me I'm not sure where to look. On a slightly different note, is there LivePage-ish support in nevow, and do you recommend moving to that yet? Thanks. -Justin

1 1