March 2000 - Zope - Zope lists

Re: [Zope] using zope for broadcast e-mail messages...
by Anthony Baxter 23 Nov '00

23 Nov '00

>>> chas wrote > Zope's dtml-sendmail tag is excellent - it makes sending > e-mail a breeze. It reminds me of a similar tag that > Cold Fusion added and which I've noticed many sites use > for sending out customized newsletters (the "Allaire > ColdFusion Application Server" header being the giveaway). > > > Now, doing the same in Zope, I can loop over the user > profiles in our database to extract name, e-mail, and > even customize the content of the newsletter as follows : > > > <dtml-in ZSQL_Select_User_Profiles> > >  > To: <dtml-var firstname> <<dtml-var email>> > From: robot <robot(a)ourdomain.com> > Subject: <dtml-var random_inanity> > > Dear <dtml-var firstname>, > > blah blah content (also dependent on his/her likes/preferences) > >  > > </dtml-in> > > > Nothing groundbreaking so far. But the question then is : how > is this going to work if the user database numbers 200,000+ ? > It will take almost half a day to complete and this can't be > done in one form-submission or page load ! Why not use ZClient to make the request to do the mailout? It can just happily sit there for half a day (or whatever) chugging along, without screwing up if your browser goes away. Anthony -- Anthony Baxter <anthony(a)interlink.com.au> It's never too late to have a happy childhood.

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99.9% CPU usage (0.1% brain usage)
by Kevin Smith 26 Jun '00

26 Jun '00

Hi there, For some reason Zope would suddenly hang and it's thread would consume 99.9% of CPU usage. The first time this happened the problem magically disappeared after a complete reinstall. Here's what happened while casually throwing bannerexchange code into the default DTML document. standard_html_footer </td> </tr> </table> <dtml-var bannerexchange> </body> </html> bannerexchange <dtml-var standard_html_header> <h2><dtml-var title_or_id></h2> <p>  </p> <dtml-var standard_html_footer> <---- Oops! I'm on Zope 2.1.6, do future version prevent me from making accidental infinite loops like this? Kevin Smith BTW: I get exponentially more done with Zope every day. Thanks for Zope.

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<code> tag?
by Mike Winter 24 May '00

24 May '00

Hi, just a quick question: how do you get Zope to display DTML without evaluating it? -- Mike Winter | mfw127(a)mail.usask.ca U. of S: 966-4759 TR Labs: 668-9323

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FYI: Zope Weekly News
by Mike Pelletier 23 May '00

23 May '00

G'day, 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. http://lists.zope.org/pipermail/zope/1999-November/013946.html http://www.digicool.com/News/Sybase * "Zen" released ZRadius, a product which allows you to authenticate web users via the Radius authentication protocol. http://www.zope.org/Members/Zen/ZRadius * 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 previous posts). http://163.182.196.200/zwiki/VisualZope * 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. http://weblogs.userland.com/zopeNewbies/stories/storyReader$0 Updates * 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. http://www.zope.org/Products/Zope/2.1.0b2/ * "4am" has submitted an update to his PythonMethod product. It allows methods, written in Python, to be created via the Zope web management interface. http://www.zope.org/Members/4am/PythonMethod * "Drew" contributed an update to his Photo product. It generates thumbnail views of images at the user's preferred size. Requires PIL. http://www.zope.org/Members/Drew/Photo * 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. http://lists.zope.org/pipermail/zope/1999-November/014115.html http://www.zope.org/Members/itamar/ZCache Zope.org items * "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. http://www.zope.org/Members/Zen/tips/VolatileAttributes * "AlexR" submitted a How-To detailing the use of the DTML entity syntax. "DTML entities" are chunks of DTML which look like this: "&dtml-title_or_id;" http://www.zope.org/Members/AlexR/EntitySyntax Notable Discussions * 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 necessary evil. 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. http://lists.zope.org/pipermail/zope/1999-November/013710.html http://lists.zope.org/pipermail/zope-dev/1999-November/002088.html http://lists.zope.org/pipermail/zope-dev/1999-November/002102.html * 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. http://www.byte.com/column/BYT19991104S0001 http://lists.zope.org/pipermail/zope/1999-November/013711.html Also, Karl Fast does an excellent job of summarising the thread, generating more sage comments. http://lists.zope.org/pipermail/zope/1999-November/013762.html http://lists.zope.org/pipermail/zope/1999-November/013812.html http://lists.zope.org/pipermail/zope/1999-November/013813.html http://lists.zope.org/pipermail/zope/1999-November/013840.html * Francois-Regis CHALAOUX posed a question about using Zope with virtual hosting. Several useful responses were generated. http://lists.zope.org/pipermail/zope/1999-November/013678.html http://lists.zope.org/pipermail/zope/1999-November/013688.html * Ben Galbraith submitted a comparison of Zope and Cold Fusion and solicited comments. Some of the usual suspects offer theirs. http://lists.zope.org/pipermail/zope/1999-November/013730.html * 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. http://lists.zope.org/pipermail/zope/1999-November/013779.html * Paul Everitt wrote in to remind us that there is a zope-dev(a)zope.org list for technical discussions. A brisk discussion developed to debate what constituted a technical discussion. http://lists.zope.org/pipermail/zope/1999-November/013796.html * 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 tuning Zope. http://lists.zope.org/pipermail/zope/1999-November/013808.html * 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 this problem. http://lists.zope.org/pipermail/zope/1999-November/014021.html * David Harrison asks zope-dev how to return an image generated on-the-fly by an External Method. Answers found. http://lists.zope.org/pipermail/zope-dev/1999-November/002107.html Mike Pelletier

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VNU Net: Python 3000 not backwards compatible, warns creator
by Yong Heng Teo 16 May '00

16 May '00

Hi, I have learning Zope for 6 months and have been following the mailling list. I come across the following news : Python 3000 will not be backwards compatible. Question : How will it affects Zope ? Regards, Yong Heng http://linuxtoday.com/stories/19062.html http://lwn.net "Python 3000 to be Complete Rewrite. Linux Today reports a warning by Guido van Rossum that Python 3000 will not be backwards compatible with Python 1.x. Guido plans to develop 3000 in tandem with 1.7 later this year. (1.6 is due by summer.) "'Python 3000 is a monumental effort - all the code will be rewritten and the documentation revised. This is my one chance to reimplement Python and fix its efficiency problems. But how incompatible it will be is a very big open question and I don't have a concrete answer,' he said." " __________________________________________________ Do You Yahoo!? Talk to your friends online with Yahoo! Messenger. http://im.yahoo.com

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Fix for SiteAccess bug affecting ZCatalog users
by Evan Simpson 11 May '00

11 May '00

There's a subtle bug in current and older versions of SiteAccess which can cause ZCatalog and dependent Products to fail. If you use an Access Rule in your root folder which alters REQUEST.path (for virtual hosting purposes, for example) then all ZCatalogs will return incorrect objects. In Products/SiteAccess/ChangeBehaviors.py, delete lines 68 and 69, or comment them out so that they look like: #if allow_btr: self.before_traverse(object, response) #entry_name = '' This ought to fix the problem. Please let me know if it doesn't. If nobody says anything, this will become SiteAccess v0.2.1 Also, a word of warning: Since ZCatalog doesn't store information (such as the request's hostname and port) used to determine object access paths under virtual hosting, you should avoid adding objects to a Catalog via one virtual host (or raw access) and retrieving them via another. Cheers, Evan @ 4-am

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Re: [Zope] Z2.log and Date stamps 2nd Call for answers????
by Michel Pelletier 24 Apr '00

24 Apr '00

We need a couple more data points before we can blame Zope for this or understand possibly what is happening. Can any one else verify and reproduce CURTIS David's problem? -Michel CURTIS David wrote: > > Friends of Zope, > > My Z2.log file entries which are in the /var/Z2.log are inconsistent with the actual system time. > The Z2.log file shows > 123.123.123.123 [08/Mar/2000:16:49:40-0700] > > The actual system time is 8:49 pacific time. > NT 4.0 show (GMT-0800 UTC) Pacific time (US and Canada);Tijuana > It and is set to automatically adjust for daylight saving time. > > I have a NT 4.0 windoze workstation machine that is running Zope latest version 2.1.4. and of course python 1.5.2. > > Is there a script file that needs adjusting to make the file log correctly? I know that -700 is UTC is Mountain Standard Time. Do Zope programmers like the warm southern climate better than the cold climates? In short can this "default" be changed. > > ! > ! > > > _______________________________________________ > Zope maillist - Zope(a)zope.org > http://lists.zope.org/mailman/listinfo/zope > ** No cross posts or HTML encoding! ** > (Related lists - > http://lists.zope.org/mailman/listinfo/zope-announce > http://lists.zope.org/mailman/listinfo/zope-dev )

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RE: [Zope] WIN2K and ZOPE FULL WEBDAV SUPPORT!!!
by Brian Lloyd 13 Apr '00

13 Apr '00

> If you are experimenting with WIN 2000 try creating a NETWORK MAPPING > (WEBDAV) to a ZOPE FOLDER. > > 1. Click on Network > 2. Click on Add a Network Place > 3. Enter the url to a ZOPE Folder > 4. Done > > You now should have a folder view in Windows that Maps to a > Zope Folder. > Enabling all sorts of great things: > > 1. Editing and Saving back to the folder with Security > 2. Drag and Drop assets into the folder with Security > > Great work on the Implementation of WEBDAV!!! Thanks DC!!! That's very good news! Unfortunately I haven't been able to install win2K yet to see how it worked - I know about one further tweak that a little microsoft birdie told me I could use to enable editing of "unprocessed" source (i.e. double click on a DTML method from a web folder and have it open unrendered in your chosen text editor or something). It shouldn't be hard to add, I just need to get the time and find a box that I care little enough about to put w2K on it... :) Brian Lloyd brian(a)digicool.com Software Engineer 540.371.6909 Digital Creations http://www.digicool.com

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Re: [Zope] GUF: Generic User Folder
by Hung Jung Lu 09 Apr '00

09 Apr '00

OK, I know some of you are out there watching. :) Here is what I found out you can do to use Zope's folder security features using your own user info database, your own login interface, and without using GUF (Generic User Folder). It's kind of simple, so don't expect too much. :) Hey, but at least it does not lock you up and send you into a panic attack. :) (1) Have your own login interface, and use some session management product or cookies to keep track of whether the user has been authenticated by you. (2) Create additional user-defined roles at the root of your Zope project. (Click on the 'Security' tab of the root folder, and scroll to the bottom.) E.g: 'teacher', 'student', 'parent', etc. (3) Create an acl_users folder at the root of your Zope project. Inside the acl_users folder, add new generic users. E.g: 'GenericTeacher', 'GenericStudent', 'GenericParent'. Assign non-trivial passwords to them, of course. (4) In your standard_html_header or equivalent, you then check against your cookies or session data. If the user is a teacher, then call: <dtml-call "REQUEST.set('AUTHENTICATED_USER', acl_users.getUser('GenericTeacher'))"> Voila! Now you can use Zope's security settings to prevent people from accessing given folders. Hung Jung ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com

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img src (newbie)
by jessica lee tishmack 08 Apr '00

08 Apr '00

Based on previous e-mails here, I have read that Zope does not support server-side includes. Is there a way to get around this in reference to an img src, as in the following: <img src="myprogram?-action=gif&yadda yadda yadda> Basically what I have here is a page that includes other documents (maps, graphs, etc.) via server-side-includes. If there isn't any way around this, then I may have to forgo Zope for now...too much of my system depends on this sort of thing. Thansk in Advance, Jessica

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