[Zope-Annce] FYI: Zope Weekly News
Wed, 17 Nov 1999 18:21:36 -0500
Zope Weekly News is a digest of some of the useful and interesting
events which have occurred on the various Zope mailing lists and the
Zope.org site. It is published each Wednesday evening.
New Products and Announcements
* Paul Everitt announces Sybase support in a joint press release.
* "Zen" released ZRadius, a product which allows you to authenticate
web users via the Radius authentication protocol.
* Anthony Pfrunder announces VisualZope 0.1a. From his web page:
Basically, the "goal" of VZ is to provide a SIMPLE visual
editing system for graphic designers which works cross-browser
and takes advantage of the acquisition and role systems within
Zope. What follows is a brief description of the components
which make up the final VZ system (probably more accurate than
* Jeff Sheldon has started a weblog of his experiences with Zope.
Jeff Sheldon is new to Zope, and is not a professional programmer.
His weblog is a valuable resource to those also starting out with
* Zope 2.1.0 beta 2 has been released. This release includes fixes
for issues found in beta 1, an updated load_site.py script and
Martijn Pieters' patches to implement try/except/else and
try/finally in DTML. Unless something major comes up, this will be
the final beta before 2.1.0 final.
* "4am" has submitted an update to his PythonMethod product. It
allows methods, written in Python, to be created via the Zope web
* "Drew" contributed an update to his Photo product. It generates
thumbnail views of images at the user's preferred size. Requires
* Itamar Shtull-Trauring announced ZCache v0.2. ZCache is a Python
Product which allows you to cache expensive methods, taking strain
off your server. It also generates 'Last-Modified' headers,
aiding browser and proxy caches.
* "Zen" submitted a tip he picked up from Michel Pelletier. He
explains how volatile attributes work, and how to populate them
when your object is loaded from the database. Volatile attributes
are attributes which do not get written to the database, and are
good for data which changes frequently.
* "AlexR" submitted a How-To detailing the use of the DTML entity
syntax. "DTML entities" are chunks of DTML which look like this:
* DTML is a HUGE topic this week. Discussions spill across several
lists. A very good job is done of identifying DTML's weak points.
Many hold that the difficulty in using DTML comes from it's roots
as a reporting language-- it isn't supposed to be used for logic.
The problem is, there isn't yet an easy replacement for DTML as a
programming language. Python Methods are cited as an excellent
start on providing a means of moving logic out of DTML.
Christopher Petrilli mentions that DC is looking at grooming
Python Methods for inclusion in Zope.
Others feel that reporting vs. programming is a forced
distinction, and that it is awkward to have to use two different
solutions. The claim that generating HTML is actually a rather
complex task, and the powerful but ugly features of DTML are a
DTML is compared to Perl! <gasp!> Otherwise, lots of very useful
tips for using DTML are revealed. An excellent read for DTML
beginners and wizards alike.
* Darcy Clark alerts the list of Jon Udell's latest article
mentioning Zope. Jon's article discusses the ease of using Zope
with Windows databases, the pain of using it with Unix databases,
cheers ODBC, and jeers lack of a similar magic bullet for Unix.
The thread then continues to discuss the relative merits of
various free databases and using them with Zope.
Also, Karl Fast does an excellent job of summarising the thread,
generating more sage comments.
* Francois-Regis CHALAOUX posed a question about using Zope with
virtual hosting. Several useful responses were generated.
* Ben Galbraith submitted a comparison of Zope and Cold Fusion and
solicited comments. Some of the usual suspects offer theirs.
* Otto Hammersmith started a thread about Zope and security. In it,
he speaks of some of the security pitfalls that unsuspecting Zope
users could experience. Brian Lloyd submits some solutions.
* Paul Everitt wrote in to remind us that there is a
email@example.com list for technical discussions. A brisk
discussion developed to debate what constituted a technical
* Theodore Patrick launched a lengthy thread with questions about
the effect of threading in Zope. A number of folks from Digital
Creations provide answers. The discussion moves on with high
volume and content to the topics of benchmarking and performance
* Farzad Farid revives the uncacheable image thread. Because
Acquisition can lead to different URLs being generated for images
when viewed from different locations, it makes caching difficult
and can generate excessive traffic. Others offer advice to solve
* David Harrison asks zope-dev how to return an image generated
on-the-fly by an External Method. Answers found.