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Join us at XML DevCon!
by Camelot Events Reminder 16 Feb '01

16 Feb '01

+ + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + If you do not wish to receive future email messages, please forward this message to camelot-remove(a)dsi-epubs.net. (be sure to forward the ENTIRE message, or you may not be removed!) + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + XML DevCon is a series of conferences designed to expose developers to topical and timely information about enterprise XML and integration technologies. Each event updates developers on key XML-related specifications and technologies. The conferences provide instruction on designing documents and programming with XML application programming interfaces (APIs). The conferences also expose developers to XML application development using technologies such as middleware, databases, scripting, messaging, content aggregation, application servers, mobile computing, application-to-application integration, and enterprise Java. To register and for more information visit: http://www.xmldevcon2001.com Please join us at our upcoming events: LONDON, ENGLAND XML DevCon Europe - Spring 2001 Conference: February 21-23, Exhibition: February 22-23 Novotel - London, England NEW YORK, NEW YORK XML DevCon - Spring 2001 Conference: April 8-11, Exhibition: April 9-10 New York Marriott Marquis, New York City You'll benefit from - * Essential and critical XML training. * Select from multiple tracks, sessions, pre-conference tutorials, Night School Sessions, hands-on workshops and panel discussions. * Comprehensive coverage of enterprise XML and eBusiness technologies and initiatives (ebXML and UDDI). * A world-class faculty including Henry Balen, Jonathan Borden, Ron Bourret, Lee Buck, Kurt Cagle, Alex Chaffee, Mark Colan, Roger Costello, Paul Cotton, Bob DuCharme, John Evdemon, Beth Gold-Bernstein, Molly Holzschlag, Benoît Marchal, Jim Melton, JP Morgenthal, Steve Muench, Gavin Nichol, Ken North, David Orchard, Jonathan Robie, Michael Rys, Gerry Seidman, Matt Sergeant, Aaron Skonnard, Simon St. Laurent, James Tauber, Tommie Usdin, and many others. * Two-day expo showcasing bleeding edge XML tools and services You'll be joined by fellow Internet Technology Developers, XML Experts and Enthusiasts, including: * Programmers, developers, engineers * Software Architects/System Engineers * Web Developers * Product Managers/Project Leaders * Consultants/Educators For conference registration and a Free Exhibit Pass visit http://www.xmldevcon2001.com ***DSIID60342<zope(a)zope.org>***

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Including remote html-pages on a Zope server (with extracting of the title and body of the remote page)
by Pieter Biemond 16 Feb '01

16 Feb '01

Hello, I'm currently trying to setup a Zope server within our company. Our current intranet is based on a static Apache server, and frames are used for navigation. I would like to get rid of the frames and convert them to HTML-tables. Because I first need to show the concept, and get the new server up and running, I need a script which can insert the contents of an external HTML-page (our old server) into a cell of the table if there is no corresponding file on the Zope-server. Examples: http://zope.foo.org/ (the new zope server) http://zope.foo.org/somepage_html (a DTML-file on the zope server, no external HTML-page needed) http://zope.foo.org/apachedoc.html (a file which doesn't exist on the Zope server, but which does exist on http://oldserver.foo.org/apachedoc.html. The Zope-server should retrieve http://oldserver.foo.org/apachedoc.html (using httplib) and should put the body of the file in a HTML-cell. I found a very usefull Howto at http://www.zope.org/Members/cba/Get_External ("How-To: Including the contents of an external HTML page") and tried to get my script working by using the standard_error_message (Yes, I know it's uggly). Questions: a) has anybody done something like this before? b) is there a neat solution for inserting a Python/DTML-script before standard_error_message gets executed? c) if I got the script working I would like to extract the title and body out of the remote page. I found an XML-suite, http://www.4suite.org/, but I doubt how it will work with non-valid HTML-pages (which unfortuately exist on our old server). Does anybody got some pieces of Python/DTML for this job? I'm fairly new with Zope/Python/DTML so any help would be appreciated. Regards, Pieter Biemond

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Zclass
by Rubinstein Fredrik 16 Feb '01

16 Feb '01

Hi there. I have built a small application starting out from the "Searchable jobboard example". Everything is now up and running. However I want to build a form that deletes objects of my own class. Does anyone out there have an good example of this. Which functions to call, wich permission need to be set and so on. With kind regards. Fred R.

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Q: ZPoPy and transactions again, with postgresql.
by Gilles Lavaux 16 Feb '01

16 Feb '01

Hello all, (NB:Axel.Missbach has asked the same thing some days ago) Sorry if it's a well_documented_somewhere/stupid question, that's my problem: I want to update a database, several tables, in one http call. I use DTML+Zsql methods, several of them during this update. How can I put theses actions inside one transaction? I use ZPopyDA+ postgresql I would appreciate an answer to this. I think it's a 'basic' problem on a www+DB system, and that it's very easily solved if you use a perl-DBI cgi. But with Zope I was unable to find a hint in the documentation/mailing list. Is it possible to do all the work inside an external method using directly the PoPy library and using the commit/rollback?? Thanks for any help Gilles Lavaux

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RE: [Zope] Including remote html-pages on a Zope server (with extracting of the title and body of the remote page)
by Pieter Biemond 16 Feb '01

16 Feb '01

Max Møller Rasmussen wrote: > >a) has anybody done something like this before? > Yes ... it's evil evil evil. > > Getting an external page ans howing the content is simple. I have > an product > that does this. But all the url's need to be converted to absolute url's. > And then you only got one page working. Why should I convert URL's to absolute ones? Because of the fact that it's an intranet most links are relative. Relative links should just work fine in my setup. I will urge our contributors not to use absolute URL's like "http://oldserver/somepage.html" but will ask them to use "/somepage.html" instead. That should work on both "http://oldserver/somepage.html" as well as "http://zope/somepage.html. Can you send your product (or the name of the product you used). > If you want to be able to browse an external site through you zope pages, > It's a whole different ballgame again. I'm not interested in converting (absolute) URL's/HREF's in the document. Regards, Pieter

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re:[Zope] MySQL, PostgreSQL, etc
by Richard Moon 16 Feb '01

16 Feb '01

> >Message: 9 >Reply-To: <donald.braman(a)yale.edu> >From: "Donald Braman" <donald.braman(a)yale.edu> >To: <zope(a)zope.org> >Date: Wed, 14 Feb 2001 14:08:53 -0500 >Subject: [Zope] MySQL, PostgreSQL, etc. > >Hello! > >I'm in a situation that I'm sure many are familiar with...choosing between >MySQL or PostgreSQL. My main goals are stability under high load and ease of >use. I don't need transactions. I know the standard comparison: MySQL is >faster, simpler, and more popular, while PostgreSQL is slower but is more >fully SQL standards based, handles transactions, etc. Are these generally >accurate descriptions? Stability under load - seems to favour PostgreSQL . Ease of Use - not quite sure what you mean by that, but the features available in PostgreSQL make it easier to code SQL that does what you want it to. Features such as Unions and Subqueries help you get at your data easily, features such as Views, Triggers and Stored Procedures are used to make databases consistent and secure - which I guess makes them easier to use ! I've seen lots of discussions on this topic and the answer you get seems to depend entirely on the person you ask. If you ask someone with experience of developing large apps using commercial databases they will say PostgreSQL. They find it amazing that anyone would contemplate serious database development without Unions, Subqueries, Views, Triggers and Stored Procedures. It's like going back ten years. Having said that the lack of OUTER (LEFT) joins in PostgreSQL is a pain, though of course there's a workaround If you ask a web-developer then the apparent speed gain of MySQL apparently overrides all other considerations. However the latest release of PostgreSQL (7.1) appears to actually outperform MySQL, particularly in a high-load situation where inserts are being done on-line (MySQL's lack of row-level locking appears to be the problem here). Take a look at this comparison http://www.phpbuilder.com/columns/tim20001112.php3 I developed a Zope-based project using PostgreSQL originally but I migrated it to MySQL because my host providers (those excellent people at NIP) were only supporting MySQL. Since my project (www.tunedb.org) didn't have any transactions involving money or real things (like stock) then the loss of transactions was not a major problem. Of course all limitations _can_ be worked around and I found workarounds for the missing Unions and Subqueries though it was a real pain. The 7. 1 release of PostgreSQL seems to address the performance issue so I can't see any reason to use MySQL if you have a free choice. >I'm wondering what people who have used either (or both!) think about using >these (or other databases) in conjunction with Zope. Are there any special >cases where one or the other works better or worse with Zope? In terms of use with Zope - I found no practical difference. Both work extremely well. The only issue I had with MySQL is that I developed my application using the latest available version at the time, then implemented it at NIP on a slightly earlier release and I found a couple of important differences to the product. If you are looking for external hosting make sure you use the same version as your external hosts - MySQL in particular seems to introduce major changes in minor releases. When I migrated I often had to workaround the limitations of MySQL so I left the ZSQL Method code there and used a variable to hold the type of database being used. So, where there is a difference I have <dtml-if "dbtype=='mysql'"> Mysql code <dtml-else> Postgres code </dtml-if> so that I can generate the correct SQL depending on the database being used. I don't know of a way to change the database connection programmatically, so to actually make the change you would have to go and change all the connections in all the ZSQL Method - not a huge task. Richard Moon

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Best method to track session.
by Juan Carlos Coruña 16 Feb '01

16 Feb '01

Hi all! I have a site with LoginManager installed. All user must authentificate. How can I track sessions? Must I install CoreSessionTracking or is there any better way to do this?

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Zope + Postgresql = poor performance
by Felipe Alvarez Harnecker 16 Feb '01

16 Feb '01

Hi Zopistas, I'm having extremely poor performance with zope 2.1.6 postgresql 7.0.2 pygresqlda 0.3rjr2 actualy zope create just one connection to postgres, so when postgres is executing one query all the rest are queued. Just image the mess So, can one tell me where to look at ? Upgrading zope is a no no at the moment. Please reply directly cause i'm not on the list. Thanx. -- ______________________________________________________ Felipe Alvarez Harnecker. QlSoftware. Tels. 665.99.41 - 09.874.60.17 e-mail: felipe.alvarez(a)qlsoft.cl http://qlsoft.cl/ http://ql.cl/ ______________________________________________________

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<Folder instance at 67f918> ???
by Lee Reilly CS1997 16 Feb '01

16 Feb '01

I'm having a problem passing in a list (as a string) to a Python method... I am creating a list called 'weights' as follows: <dtml-call "REQUEST.set('weights',[])"> <dtml-in "REQUEST.form.items()"> <dtml-if expr="_['sequence-key'] in ('classcode','tablename', 'practicals', 'tutorials', 'assignments', 'bonus')"> <dtml-else> <dtml-call "weights.append(_['sequence-key'] + 'x' + _['sequence-item'])"> </dtml-if> </dtml-in> When I pass this to a Python method and simply return the value of weights like: <dtml-var expr="obtainResults(_.this, `weights`)"> <Folder instance at 67f918> appears in the page (well, in the HTML source) instead of the actual value of weights. Where am I going wrong? displaying <dtml-var weights> gives me: ['b2x5', 'b1x4', 'p9x2', 'p8x3', 'p5x2', 'p4x3', 'p7x2', 'p6x3', 'p1x2', 'p3x2', 'p2x3'] so that's okay. Can anyone offer me any advice? Thanks very much in advance, Lee

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Re: [Zope] Translator Product
by Federico Di Gregorio 16 Feb '01

16 Feb '01

Scavenging the mail folder uncovered Paolo Comitini's letter: > > Im using Zope 2.2.5 and the Translator Product... > But I'm running into troubles. I found no > way of doing the following > > http://www.website.com/FH1/index_html > finding > http://www.website.com/de/FH1/index_html or > http://www.website.com/en/FH1/index_html the Translator does not descend a folder hierarchy. trnslated objects should be placed in a flat hierarchy inside the language folders. do as follows: http://www.website.com/FH1/Translator http://www.website.com/FH1/Translator/en/index_html http://www.website.com/FH1/Translator/de/index_html then <dtml-with FH1> <dtml-lvar index_thml> </dtml-with> will work. ciao, federico -- Federico Di Gregorio MIXAD LIVE Chief of Research & Technology fog(a)mixadlive.com Debian GNU/Linux Developer & Italian Press Contact fog(a)debian.org The number of the beast: vi vi vi. -- Delexa Jones

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