Zope January 2000

zope@zope.dev

349 participants
963 discussions

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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<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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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] AUTHENTICATED_USER?
by Martijn Pieters 14 Feb '00

14 Feb '00

> -----Original Message----- > From: Guy Davis [mailto:davis@arc.ab.ca] > > I am trying to disallow anonymous access for all but a handful of > domains. This is easy to do with Apache, but how can it be done with > Zope? > > The only thing I could think of was to have the following in the > standard_html_header. > > <dtml-if "AUTHENTICATED_USER == 'Anonymous User'" > > {if remote address is acceptable} > {show the true page} > {else show an error message} > <dtml-else> > {show the true page} > </dtml-if> > > However the above expression never evaluates to true even when > <dtml-var AUTHENTICATED_USER> shows 'Anonymous User' on the > same page. > If I try to use string.find(), Zope complains that > AUTHENTICATED_USER is > a bad arguement. > > Is there someway to salvage what I'm doing, or better yet is there a > simpler mechanism to achieve this goal? Thanks. Yes. You can make a new Role, let's call it DomainUser. You give this Role all privileges that the Anonymous Role has, and you revoke all rights from the Anonymous Role. Now you create a new user, and call this AnonymousDomainUser. This user you give _no_ password, just leave the password fields blank. You do specify the domains however; it is a space separated list of domain specs, where each domain spec can be either a domain name, or an IP address, where wildcards can be used anywhere between the dots. For example: *.zope.org *.digicool.com 192.8.*.* is a valid domain spec. And you also give the user the DomainUser Role. Now, as soon as a visitor comes to your site from a domain that matches the domain spec, Zope will, without asking for a password, match him against the AnonymousDomainUser User, give him the DomainUser Role, and grant that visitor access. Anyone from any other domain will be prompted for a username and password. -- Martijn Pieters, Software Engineer | Digital Creations http://www.digicool.com | Creators of Zope http://www.zope.org | mailto:mj@digicool.com ICQ: 4532236 | PGP: http://wwwkeys.nl.pgp.net:11371/pks/lookup?op=get&search=0xA8A32149 -------------------------------------------

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Storing an image (gif) in oracle table
by Daniel G. Rusch 04 Feb '00

04 Feb '00

Does anyone have any ideas on how to store an image (gif) into an oracle table through Zope. Zope doesn't seem to support BLOB's as an ZSQL Method argument. Thanks, DR

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Re: [Zope] DCOracle for 8.1.5 (8i)
by zwang＠turbolinux.com 03 Feb '00

03 Feb '00

Sorry for that I am newbie to this area. How to fiddle that link options to get it work? Thanks. Zifa Anthony Baxter <anthony(a)interlink.com.au> said: > > DCOracle works against 8i. You just have to fiddle the Setup > script to get the link libraries right. > > It doesn't use some of the new neato whizzbang 8i features, but > if that sort of early-adopter stuff is what you need, that's where > you pay them to add it. > > I'm using it against an 8i database every day. > > Anthony. > > >>> "Adam Gotheridge" wrote > > Hmmm.... I would think external rdbms support is crucial to the future > > success of the product. If you had to pick one rdbms to support, wouldn't a > > current Oracle be a good choice? Zope is a great product, but if there is to > > be no 8i support it will force me to use something else. Currently we are > > running Zope on a win2k box connected to a debian 8i box, but the hope has > > really been get zope off Windows. > > > > I think you should guys should consider revisiting the issue. You can > > download 8i from the technet site to get an idea how much work it will take. > > I'm sure someone spent considerable time making the existing oracle adapter > > work, it might not be that bad to make it work against 8i. > > > > > > ----- Original Message ----- > > From: "Michel Pelletier" <michel(a)digicool.com> > > To: <zwang(a)turbolinux.com>; <zope(a)zope.org> > > Sent: Friday, January 28, 2000 4:49 PM > > Subject: RE: [Zope] DCOracle for 8.1.5 (8i) > > > > > > > I don't know what the status on 8i compatability is, have you tried it? > > > It might just work. > > > > > > Note that Oracle's client libraries change in non-backwards compatable > > > ways quite often. You many need to make minor adjustments to the code. > > > > > > We do not have 8i, and the only way we're going to look at it is if one > > > of our customers requires 8i compatability or wants to specificly pay > > > for 8i integration. > > > > > > -Michel > > > > > > > -----Original Message----- > > > > From: zwang(a)turbolinux.com [mailto:zwang@turbolinux.com] > > > > Sent: Friday, January 28, 2000 1:14 PM > > > > To: zope(a)zope.org > > > > Subject: [Zope] DCOracle for 8.1.5 (8i) > > > > > > > > > > > > Does anyone here know when will the Adapter for Oracle 8i be > > > > ready for us to > > > > use? Any plan at all? If there is any, what is the time frame? > > > > > > > > Thanks. > > > > > > > > > > > > > > > > _______________________________________________ > > > > 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 ) > > > > > > > > > > _______________________________________________ > > > 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 ) > > > > > > > > > > > > _______________________________________________ > > 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 ) > > -- > Anthony Baxter <anthony(a)interlink.com.au> > It's never too late to have a happy childhood. > > > _______________________________________________ > 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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pipedream : fork a dtml-method within zope ?
by chas 02 Feb '00

02 Feb '00

Consider a discussion forum product where a dozen people have already participated in a particular thread. These people, when posting their messages, checked a box which said "email me when somebody else responds/adds to this thread". (Yes, this is nicked from Cold Fusion Forums :-) Now, a 13th person adds his 2 cents to the thread and posts a response. We want to now send a mail to each of the first 12 participants. No problem so far, except mailing all 12 people is going to take quite a bit of time, and contributor #13 is going to get impatient waiting whilst this is happening. Then imagine a discussion thread with dozens of participants/posts. Solutions : a. Write some script to go through the discussion forums looking for such follow ups and mail the previous participants in the discussion thread. Cronjob it. Tiresome/boring and not as instantaneous as I'd like. b. Is it possible in any way to fork that mailing process (which is actually just one dtml method), so that it can be completed without slowing down the rendering of the page ? I'm guessing this is totally beyond zope. Or am I overlooking something obvious ? TIA, Chas

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RE: [Zope] Zcatalog and random numerical key error
by Michel Pelletier 02 Feb '00

02 Feb '00

> -----Original Message----- > From: - [mailto:kedai@kedai.com.my] > Sent: Monday, January 24, 2000 9:13 PM > To: zope(a)zope.org > Subject: [Zope] Zcatalog and random numerical key error > > > hi all, > > situation: > got a zclass, that is catalog aware. when searches are made, > some return > results, while other times it returns random numerical key > error. i remembered > seeing this symptom on zope.org last year. but it has now > disappeared. > anybody got a clue on what's going on? Your Catalog has gotten out of sync, just click 'Update Catalog' and it will fix itself. It's due to asking for uid of a record that is no longer cataloged. I don't know what could have caused it in your case, probably something in your DTML methods for the ZClass. -Michel

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Need help : Zope servers hanging.
by Tony McDonald 02 Feb '00

02 Feb '00

Hi all, I need some help here - over the past few days two different Zope servers have gone into the 'hanging' state, where they don't reply to further requests. When the first event happened I didn't take a 'top', today, I've managed to get one. The process causing the problem is 12482. From previous messages, I believe that the python CPU can go up to 100%, obviously this isn't happening here. This happened when I asked the Zope server to make a MySQL query. The MySQL server is running fine and I can get to it from a command line interface. Both servers are Zope 2.1.2 source distributions running under Solaris 5.6 This server is running three different Zope sites using Apache as the backend (ie I'm using pcgi to get to my servers). I can't get to it using the pcgi route (ie a ReWrite Rule from Apache), nor from the ZServer incarnation of the server. I also can't get to it from the monitor connection (telnet localhost 8099). I can't let this situation continue as these are live sites. I need to restart the server whenever this happens. Process list: load averages: 1.39, 1.11, 0.63 08:51:59 262 processes: 258 sleeping, 2 zombie, 2 on cpu CPU states: 74.6% idle, 25.0% user, 0.4% kernel, 0.0% iowait, 0.0% swap Memory: 512M real, 25M free, 560M swap in use, 736M swap free PID USERNAME THR PRI NICE SIZE RES STATE TIME CPU COMMAND 12482 nnle 9 -5 0 38M 20M cpu/0 267:57 24.94% python 23032 nnle 1 23 0 1992K 1456K cpu/2 0:00 0.32% top 6736 nnle 8 33 0 12M 9360K sleep 3:55 0.00% roxen 15072 nnle 8 33 0 14M 11M sleep 0:59 0.00% python 1848 nnle 7 33 0 10M 7728K sleep 0:40 0.00% python 15071 nnle 4 -25 0 4240K 1304K sleep 0:00 0.00% python 1847 nnle 4 -25 0 4240K 856K sleep 0:00 0.00% python 656 nnle 1 -25 0 928K 512K sleep 0:00 0.00% start 12481 nnle 4 -5 0 4240K 856K sleep 0:00 0.00% python 18305 nnle 1 23 0 2056K 1832K sleep 0:00 0.00% tcsh 19302 nnle 1 23 0 2000K 1040K sleep 0:00 0.00% tcsh 19481 nnle 1 33 0 1000K 672K sleep 0:00 0.00% grep The only other data I have is that the pcgi for this site is shown as running in the process list quite a few times. nobody 23059 4659 0 08:54:28 ? 0:00 /home/nnle/MED_DUR_NOTTS/pcgi/pcgi-wrapper /home/nnle/MED_DUR_NOTTS/Zope.cgi nobody 23135 4716 0 09:03:18 ? 0:00 /home/nnle/MED_DUR_NOTTS/pcgi/pcgi-wrapper /home/nnle/MED_DUR_NOTTS/Zope.cgi nobody 23069 4574 0 08:57:03 ? 0:00 /home/nnle/MED_DUR_NOTTS/pcgi/pcgi-wrapper /home/nnle/MED_DUR_NOTTS/Zope.cgi nobody 23068 4753 0 08:56:52 ? 0:00 /home/nnle/MED_DUR_NOTTS/pcgi/pcgi-wrapper /home/nnle/MED_DUR_NOTTS/Zope.cgi nobody 23144 4694 0 09:04:11 ? 0:00 /home/nnle/MED_DUR_NOTTS/pcgi/pcgi-wrapper /home/nnle/MED_DUR_NOTTS/Zope.cgi nnle 12481 1 0 Jan 21 ? 0:00 /usr/local/bin/python /home/nnle/MED_DUR_NOTTS/z2.py nobody 23064 4737 0 08:55:59 ? 0:00 /home/nnle/MED_DUR_NOTTS/pcgi/pcgi-wrapper /home/nnle/MED_DUR_NOTTS/Zope.cgi nnle 12482 12481 25 Jan 21 ? 280:44 /usr/local/bin/python /home/nnle/MED_DUR_NOTTS/z2.py *any* help at all on this would be really appreciated. Tone ------ Dr Tony McDonald, FMCC, Networked Learning Environments Project http://nle.ncl.ac.uk/ The Medical School, Newcastle University Tel: +44 191 222 5888 Fingerprint: 3450 876D FA41 B926 D3DD F8C3 F2D0 C3B9 8B38 18A2

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Zope January 2000