December 2000 - Zope

NIST meeting: "Defining Standard, Scriptable Objects for CAD/CAE/CAM/PDM" CAD/CAE/CAM/PDM"
by Steve Waterbury 08 Dec '00

08 Dec '00

"Defining Standard, Scriptable Objects for CAD/CAE/CAM/PDM" Date: December 13th Time: 10:00 AM - 4:00 PM Location: NIST, Building 225, Room A54 -> for directions and maps to NIST, see: http://www.nist.gov/public_affairs/maps/nistmaps.html * If you plan to come, you MUST contact Michael McLay, so that we are sure that the meeting room space is adequate: mailto:mclay@nist.gov - or call 301-975-4099 Background: Roughly, PDM ("Product Data Management") does for CAD/CAE/CAM models and related objects what Zope does for the objects that need to be managed in a typical Web site (HTML docs, etc.). Problem Statement The problem is to find an open architecture for integrating and managing the configuration of computer-aided design, analysis, and manufacturing (CAD/CAE/CAM) tools, models, and data. The purpose of the meeting is to evaluate technologies, try to define an approximate roadmap for building an open architecture, and establish a ROM guess of (1) how much work may be required to implement the architecture components and (2) the cost of developing and maintaining an instance of the architecture for an engineering organization. Agenda: * Engineering Tool/Data Integration Requirements Steve Waterbury/NASA * GenCAM: a Standard API for Electronic Manufacturing Data Michael McLay/NIST * The MEMS Exchange: Python and ZODB for Management of Complex Objects Andrew Kuchling/CNRI * The CADScript/IScript Architecture (and Demo) Doug Cheney/International TechneGroup, Inc. * Python and Zope: Architectures and Directions Barry Warsaw/Python Labs * Group discussion - How to incorporate interfaces to Python and Zope components such as ZODB into a standard PDM architecture - What enhancements to ZODB, ZCatalog, ZPatterns, etc., can address functionality and interfaces needed for general PDM - Which pieces of the architecture make the most sense as open source products, which ones are most logical as commercial products, and what interfaces should be standardized to enable open source and commercial products to interoperate. Cheers, -- Steve Waterbury NASA/Goddard Space Flight Center. oo _\o \/\ \ / ____________________________________________ oo _________________ "Sometimes you're the windshield; sometimes you're the bug." - Knopfler Stephen C. Waterbury Component Technologies Code 562, NASA/GSFC and Radiation Effects Branch Greenbelt, MD 20771 Engineering Web/Database Specialist Tel: 301-286-7557 FAX: 301-286-1695 WWW: http://misspiggy.gsfc.nasa.gov/people/waterbug.html _________________________________________________________________

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persistence and dictionaries
by Matt 08 Dec '00

08 Dec '00

Hi I am trying to get a handle on how I should handle peristence in my python products. I have read all the ZODB documents and all the Product tutorials, which all led me to believe that 1) mutable objects such as lists and dictionaries are not persistent and that updates to these will not be implicitly saved into the ZODB, and 2) that custom classes would certainly not persist. That all seemed fine, and I used persitent mapping and __setstate__ to fill things back in where necessary. But then I decided to demonstrate that persitence does break as suggested. I used boring product, added a dicitonary and a custom class that contains it's own dictionary.... let the user update name : value pairs for both, and print the contents through index.dtml The problem is that everything persists fine !!!! through restarts, everything? Why does it work??? shouldn't it not? I have attached the modified boring product .... boringplus ..... it's dead simple to follow if you have made products before. Any explanation would be really nice. regards Matt

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Re: [Zope] Disabling Services
by Dieter Maurer 08 Dec '00

08 Dec '00

Chris Withers writes: > ZServer Medusa (V1.16.4.3) > ... > > Which of those handles WebDAV requests? WebDAV runs on top of HTTP. You must disable ZServer Medusa. Maybe, you accept WebDAV? Dieter

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image resize
by Leichtman, David J 08 Dec '00

08 Dec '00

Is there a way to do a dynamic image resize in Zope? I know PHP has that ability, and I was hoping that Zope had something similar. And I'm not talking about height and width atributes in the img tag. I mean actually creating, on-the-fly, a new duplicate of the image that's a different size.

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security - am I going crazy ?
by Aleksander Salwa 08 Dec '00

08 Dec '00

Few days ago I found that on site that I'm currently working on, everybody can add DTMLMethods and Documents (and maybe do more, I haven't checked yet, but I think it's bad enough !) by simply entering URL http://www.mysite.com/manage_addDTMLMethod?id=q1&title=qq1&file=qqq1 After that Zope sends 'Location' header to redirect user to 'manage_main'. That (manage_main) causes 'Unauthorized' exception. But that object 'q1' was added !!! I was thinking that it's a bug in Product. (I use LoginManager, LocalFS, SiteAccess). I decided to upgrade my Zope from 2.2.1 to 2.2.4 and upgrade all Products (one good thing so far ;)). No success. So I did fresh install of Zope 2.2.4, without additional Products, with with brand new Data.fs. Problem persists ! I have default security settings, so Anonymous can't "Add Documents, Images, and Files". Of course user can put any DTML in this object - you know the consequences... (and if the folder where this object is located is owned by high-privileged user, then this object is owned by that user too (through acquisition)). I just checked: I can't add Folders this way. What's going on ?!? Have I found very big security hole, or just I'm going crazy ? :( P.S. Just take a look at object with id "haveIFoundABug" in root level of www.zope.org that I created few seconds ago... ololo(a)zeus.polsl.gliwice.pl /--------------------------------------\ | `long long long' is too long for GCC | \--------------------------------------/

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Another Zope E-Commerce Site Online
by Brad Clements 08 Dec '00

08 Dec '00

Just announcing this new e-commerce zope based site. http://www.adirondackcraft.com Come buy something, but don't whack it too hard, this site is still a work in progress (aren't they all?) -- This site was "thrown together" in about 5 days for a disorganized customer, came online just 30 minutes before it's first sale. They had a big ad in the New York Times which pushed the deadline. - Zope 2.2.4 with Interbase, gvibDA and Wampum Generator running behind Apache with mod_proxy and mod_ssl, on RH Linux 7. I'm thinking of writing a white paper on this entire experience, from a consulting point of view and a programmer's viewpoint. Not sure how useful that would be to anyone. There were 2 graphics/layout designers and myself working directly with the customer to go from concept to completion in an extremely short timeframe. Brad Clements, bkc(a)murkworks.com (315)268-1000 http://www.murkworks.com (315)268-9812 Fax netmeeting: ils://ils.murkworks.com AOL-IM: BKClements

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Adding users to acl_users
by Mike Kelland 08 Dec '00

08 Dec '00

Hi everyone, I tried to add the manage_users thing that someone referred me to (sorry that I don't remember who) and got the following error: Error Type: KeyError Error Value: __cmp__ my code is as follows: <table width="600" border="0" cellpadding="3" cellspacing="1"> <tr class="one"> <td style="text-align:left" colspan="2"> User Name: <br><input name="name"> </td> </tr> <tr class="two"> <td style="text-align:left"> Password:<br> <input name="password"> </td> <td style="text-align:left"> Confirm Password: <br> <input name="confirm"> </td> </tr> <tr class="one" > <td style="text-align:left" colspan="2"> Role: <br> <SELECT NAME="roles:list" SIZE="5" MULTIPLE> <OPTION VALUE="Manager">Manager <OPTION VALUE="Owner">Owner <OPTION VALUE="User">User </SELECT> <br> <INPUT TYPE="TEXT" NAME="domains:tokens" VALUE="" SIZE="40"> </td> </tr> <tr class="two"> <td colspan="2"> <input type="submit" name="submit" value="Add"> </table> ---------END--------- to get the information and I'm using the code: <dtml-with acl_users> <dtml-call expr="manage_users(REQUEST)"> </dtml-with> to process it. I've taken the code pretty much directly from the acl_users folder's Add form... Anyone know what's going on? Thanks again for everyone's help. The _.str(date) thing worked perfectly with my Access date problem... Mike Kelland mike(a)studiomatic.com

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Re: [Zope] Zope 2.2.4 dying under Solaris 2.6
by Tres Seaver 08 Dec '00

08 Dec '00

Michael Best <mbest(a)emergence.com> wrote: > > I have had Zope 2.0.1, Zope 2.1.6 and Zope 2.2.4 running on Solaris 2.6 > and inexplicably, every so often (no definiate amount of time) the Zope > dies. > > Any ideas? > > ---------- > A typical entry from STUPID_LOG is: > 2000-12-07T18:23:22 ERROR(200) zdaemon zdaemon: Thu Dec 7 11:23:22 > 2000: Aiieee! 17564 exited with error code: 11 > ---------- Error code 11 is almost certainly a SEGFAULT, which would typically mean a pointer bug in a "C" extension. Can you arrange to get a core file created, and use xdb/gdb to figure out what code was running when the bug juice squirted? At a higher level, what add-on products are you using with Zope? Tres. -- =============================================================== Tres Seaver tseaver(a)digicool.com Digital Creations "Zope Dealers" http://www.zope.org

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strange ZClass method problem
by Didier Georgieff 08 Dec '00

08 Dec '00

Hello, * I have 2 Folders (Yihaw ZClass instances) * both folders have News objects (cataloged) I put the news on the front page via (this is taken from Yihaw, simplified for the demonstation, but still have the problem) this code <dtml-in "Catalog( meta_type='Yihaw News Item', sort_on='bobobase_modification_time', sort_order='reverse')" size=30 start=query_start> <dtml-with "Catalog.getobject(data_record_id_)"> <dtml-var absolute_url html_quote> - <dtml-var title_or_id html_quote><br> </dtml-with> </dtml-in> Problem is that some news items are OK and some raise an exeption on <dtml-var title_or_id> told to be missing (!!??) It puzzle me because all news items are same ZClass instance and can be accesed normally via the zope interface, or directly, works well on view etc ... An other strange thing is when i supress the <html_quote> option, an authentication windows show up and gives an other traceback (see below). So when i put the <missing> option, to the <dtml-var title_or_id> it works well except nothing shows on the <dtml-var title_or_id>, and the right <absolute_url> is correctly shown for ALL the news item (including the b"bad" ones. In the context of both Yihaw Folder i have access content, view authorisation and view (via a local role). Only difference is : * in the folder with problem access content, view authorisation, view are given by hand at this level (without permission acquisition for those 3 for anonymous restriction) * in the folder without problem it's acquired from above (no anonymoiyus restriction) It happens even when i'm "manager". So i suspect some strange security problem, or more sure something i didn't understood on the acquisition/security machinery. And I'm not sure if it has relation with the fact those items are custom ZClass instances I hope this was clear and not too cryptic. The 2 traceback : 1- WITHOUT html_quote Unauthorized You are not authorized to access title_or_id. Traceback (innermost last): File /zope/2-2-2/lib/python/ZPublisher/Publish.py, line 222, in publish_module File /zope/2-2-2/lib/python/ZPublisher/Publish.py, line 187, in publish File /zope/2-2-2/lib/python/ZPublisher/Publish.py, line 171, in publish File /zope/2-2-2/lib/python/ZPublisher/mapply.py, line 160, in mapply (Object: yihaw_test1) File /zope/2-2-2/lib/python/ZPublisher/Publish.py, line 112, in call_object (Object: yihaw_test1) File /zope/2-2-2/lib/python/OFS/DTMLMethod.py, line 172, in __call__ (Object: yihaw_test1) File /zope/2-2-2/lib/python/DocumentTemplate/DT_String.py, line 528, in __call__ (Object: yihaw_test1) File /zope/2-2-2/lib/python/DocumentTemplate/DT_In.py, line 611, in renderwb (Object: Catalog(meta_type='Yihaw News Item', sort_on='bobobase_modification_time', sort_order='reverse')) File /zope/2-2-2/lib/python/DocumentTemplate/DT_With.py, line 146, in render (Object: Catalog.getobject(data_record_id_)) File /zope/2-2-2/lib/python/OFS/DTMLMethod.py, line 194, in validate (Object: yihaw_test1) File /zope/2-2- 2/lib/python/AccessControl/SecurityManager.py, line 139, in validate File /zope/2-2- 2/lib/python/AccessControl/ZopeSecurityPolicy.py, line 209, in validate Unauthorized: (see above) 2 - WITH html_quote KeyError Sorry, a Zope error occurred. Traceback (innermost last): File /zope/2-2-2/lib/python/ZPublisher/Publish.py, line 222, in publish_module File /zope/2-2-2/lib/python/ZPublisher/Publish.py, line 187, in publish File /zope/2-2-2/lib/python/Zope/__init__.py, line 221, in zpublisher_exception_hook (Object: ApplicationDefaultPermissions) File /zope/2-2-2/lib/python/ZPublisher/Publish.py, line 171, in publish File /zope/2-2-2/lib/python/ZPublisher/mapply.py, line 160, in mapply (Object: yihaw_test1) File /zope/2-2-2/lib/python/ZPublisher/Publish.py, line 112, in call_object (Object: yihaw_test1) File /zope/2-2-2/lib/python/OFS/DTMLMethod.py, line 172, in __call__ (Object: yihaw_test1) File /zope/2-2-2/lib/python/DocumentTemplate/DT_String.py, line 528, in __call__ (Object: yihaw_test1) File /zope/2-2-2/lib/python/DocumentTemplate/DT_In.py, line 611, in renderwb (Object: Catalog(meta_type='Yihaw News Item', sort_on='bobobase_modification_time', sort_order='reverse')) File /zope/2-2-2/lib/python/DocumentTemplate/DT_With.py, line 146, in render (Object: Catalog.getobject(data_record_id_)) File /zope/2-2-2/lib/python/DocumentTemplate/DT_Var.py, line 276, in render (Object: title_or_id) KeyError: title_or_id -- Didier Georgieff DDAF du Bas-Rhin - Cellule SIG 2, rue des Mineurs 67070 Strasbourg Cedex tél : 03.88.25.20.33 - fax : 03.88.25.20.01 email : didier.georgieff(a)agriculture.gouv.fr SIT du Bas-Rhin : http://www.bas-rhin.sit.gouv.fr GéoWeb http://sertit10.u-strasbg.fr

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Zope's default icons not displayed
by Anthony Monta 08 Dec '00

08 Dec '00

Hi, Yikes, can someone help me out? My browser isn't rendering Zope's default icons on its management screens. I'm running Zope version: Zope 2.2.4b1 (binary release, python 1.5.2, linux2-x86) Python version: 1.5.2 (#10, Dec 6 1999, 12:16:27) [GCC 2.7.2.3] System Platform: linux2 I get an attribute error. Here's the traceback:  _p_mtime? Any guidance would be greatly appreciated. Cheers, Anthony ~~~~~~~~~~~~~~~~ Dr. A. B. Monta Coordinator of Curricular Assessment & Academic Reporting Louisiana Board of Regents 150 Third Street, Suite 129 Baton Rouge, LA 70801-1389 225.342.4253, ext. 143 amonta(a)regents.state.la.us

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