September 2000 - Zope

Restricting URL access to objects that are not complete web pages
by Stephen Simmons 21 Sep '00

21 Sep '00

After reading the Zope lists for a couple of months to struggle up the Zope learning curve, it's time for my first question. I want to serve web pages build up from a database of document components. Zope's object-based subsystems should be completely hidden so that the only objects accessible over the web interface are complete, well-formed HTML web pages. For the sake of simplicity, suppose we have three types of components, web pages, articles and sections. These components obey the following 4 rules: 1. Web pages operate just like a DTML document, where the articles and sections from which it is built are specified via dtml-var. The page definition starts with standard_html_header and _footer (or similar) to create nice HTML output. 2. Articles are primarily meant for inclusion within a web page so that they are displayed in a browser by specifying the URL of their containing web page. However if an article's URL is specified, the article automatically gets wrapped in an HTML template. 3. Sections are only used as building blocks for other documents so it must not be possible to retrieve a section via a URL. 4. Similarly, standard_html_header and other methods/objects not meant to be a standalone web page should not be accessible via a URL. My thoughts were to use an html_header that tracks how deeply components are nested so that inner components turn off the page wrapper. This achieves 1 and 2. This also achieves 3 if sections raise an exception if their page wrapper is not turned off. But 4 was where I got stuck. I want to use the full magic of acquisition when assembling web pages from components within a page, but prevent acquisition from returning other objects via URLs. So mypage in http://myserver:8080/myarea/mypage is able to find standard_html_header by acquisition but http://myserver:8080/myarea/mypage/standard_html_header gives a not-found error. Any suggestions? Something involving permissions/roles? Hacking before_bobo_traverse()? Something simpler? Thanks for any assistance! Stephen _______________________________ Stephen Simmons HealthArena B.V. phone +31 20 486 0555 stephen.simmons(a)healtharena.net

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Problem with Tree tag
by Chalu Kim 21 Sep '00

21 Sep '00

Has anyone seen this when running Tree? Traceback (innermost last): File /usr/local/Zope-2.2.0-src/lib/python/ZPublisher/Publish.py, line 222, in publish_module File /usr/local/Zope-2.2.0-src/lib/python/ZPublisher/Publish.py, line 187, in publish File /usr/local/Zope-2.2.0-src/lib/python/Zope/__init__.py, line 221, in zpublisher_exception_hook (Object: ElementWithAttributes) File /usr/local/Zope-2.2.0-src/lib/python/ZPublisher/Publish.py, line 171, in publish File /usr/local/Zope-2.2.0-src/lib/python/ZPublisher/mapply.py, line 160, in mapply (Object: testtree) File /usr/local/Zope-2.2.0-src/lib/python/ZPublisher/Publish.py, line 112, in call_object (Object: testtree) File /usr/local/Zope-2.2.0-src/lib/python/OFS/DTMLMethod.py, line 167, in __call__ (Object: testtree) File /usr/local/Zope-2.2.0-src/lib/python/DocumentTemplate/DT_String.py, line 502, in __call__ (Object: testtree) File /usr/local/Zope-2.2.0-src/lib/python/OFS/DTMLMethod.py, line 163, in __call__ (Object: standard_html_header) File /usr/local/Zope-2.2.0-src/lib/python/DocumentTemplate/DT_String.py, line 502, in __call__ (Object: standard_html_header) File /usr/local/Zope-2.2.0-src/lib/python/Products/Renderable/Renderable.py, line 17, in __str__ (Object: Renderable) File /usr/local/Zope-2.2.0-src/lib/python/OFS/DTMLMethod.py, line 167, in __call__ (Object: render) File /usr/local/Zope-2.2.0-src/lib/python/DocumentTemplate/DT_String.py, line 502, in __call__ (Object: render) File /usr/local/Zope-2.2.0-src/lib/python/TreeDisplay/TreeTag.py, line 155, in render (Object: id) File /usr/local/Zope-2.2.0-src/lib/python/TreeDisplay/TreeTag.py, line 238, in tpRender File /usr/local/Zope-2.2.0-src/lib/python/TreeDisplay/TreeTag.py, line 567, in apply_diff (Info: ([None, ([140894976, []],)], ['AAAAAAAAE04='])) AttributeError: 'tuple' object has no attribute 'append'

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sendmail
by Jason Cunliffe 21 Sep '00

21 Sep '00

Hello Trying to automate some sendmail messages but we keep getting Error Type: error Error Value: host not found Traceback (innermost last): File /Zope-2.2.0/lib/python/ZPublisher/Publish.py, line 222, in publish_module File /Zope-2.2.0/lib/python/ZPublisher/Publish.py, line 187, in publish File /Zope-2.2.0/lib/python/Zope/__init__.py, line 221, in zpublisher_exception_hook (Object: ApplicationDefaultPermissions) File /Zope-2.2.0/lib/python/ZPublisher/Publish.py, line 171, in publish File /Zope-2.2.0/lib/python/ZPublisher/mapply.py, line 160, in mapply (Object: sendmail_test) File /Zope-2.2.0/lib/python/ZPublisher/Publish.py, line 112, in call_object (Object: sendmail_test) File /Zope-2.2.0/lib/python/OFS/DTMLMethod.py, line 167, in __call__ (Object: sendmail_test) File /Zope-2.2.0/lib/python/DocumentTemplate/DT_String.py, line 502, in __call__ (Object: sendmail_test) File /Zope-2.2.0/lib/python/Products/MailHost/SendMailTag.py, line 188, in render (Object: dolphinsMailHost) File /Zope-2.2.0/lib/python/Products/MailHost/MailHost.py, line 220, in send (Object: dolphinsMailHost) File /Zope-2.2.0/lib/python1.5/smtplib.py, line 452, in sendmail File /Zope-2.2.0/lib/python1.5/smtplib.py, line 303, in ehlo error: (see above) Any clues to what is wrng here? tia - Jason ________________________________________________________________ Jason CUNLIFFE = NOMADICS.(Interactive Art and Technology).Design Director

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Odd stuff at zope.org...
by Curtis Maloney 21 Sep '00

21 Sep '00

Just tried to go to www.zope.org and got: Proxy Error The proxy server received an invalid response from an upstream server. The proxy server could not handle the request GET /. Reason: Could not connect to remote machine: Connection refused Apache/1.3.9 Server at www.zope.org Port 80 Curtis Maloney.

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Zope site featured on NewsForge
by Brendon Grunewald 21 Sep '00

21 Sep '00

You may be interested to know that Zope has been mentioned in an article that NewsForge did about my zope based site. Keep up the good work, Brendon ------------------ 70South: the No.1 source for Antarcticles. For the latest news and views on Antarctica visit : http://www.70south.com

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logging on problem
by Willem Oudyk 21 Sep '00

21 Sep '00

Hi, I have installed ZOPE and tried to logon to localhost:8080/manage but I have forgotten the userid/pw. The file (called 'access') shows my name and then something encrypted but I dont know how to use it for logging on. Can anyone help? ------------------------------------------------- Willem Oudyk 14 Fortescue Grove Vermont Sth. Victoria 3133 Australia Ph/Fax: +61 (3) 9887 9121 mailto:willem@pangaea.nu Web:www.pangaea.nu -------------------------------------------------

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FSF about Zope and GPL'ed components
by Nils Kassube 21 Sep '00

21 Sep '00

====== Forwarded Message ====== Date: 19.09.2000 16:57 Uhr Received: 19.09.2000 22:58 Uhr From: licensing(a)gnu.org (Free Software Foundation) To: nika(a)kassube.de (Nils Kassube) Nils Kassube wrote: > If I use a GPL'ed component in a complex object oriented environment > like Zope, does this mean that the whole work is now subject to the GPL? > > work = Zope-based web site/web application > use = e.g. subclassing it or method calls, etc. It sounds like you are building software that combines Zope and GPL'ed software to form a single, larger program. In this case, the whole larger program falls under the terms of the GPL. This is a real problem, since the license of Zope is incompatible with the GNU GPL. This means you can't legally distribute the system. > If the GPL applies to the entire work, the resulting question is: How do I > separate my work inside a Zope-based application from GPL'ed pieces to > prevent this from happening? Or do I have to rewrite the GPL part? You cannot legally combined GPL'ed software with Zope. You'll need to rewrite the Zope part and release the software under a license compatible with the Zope license, or you'll need to convince the developers of Zope to make their license compatible with the GPL. (In the latter case, the whole system would be covered by the GPL, so you'd still be bound by the terms of the GPL---the only difference would be that it'd be legally to distribute the system, since Zope wouldn't be GPL-incompatible anymore.) > Everything would be easy, if we would only be talking about programs like > Emacs but Zope products/modules/components/whatever look more like > libraries to me... Regardless of whether or not a program is a library, when you combine it with GPL'ed software to form a larger program, all of the code in the system falls under the terms of the GPL. -- Bradley M. Kuhn Free Software Foundation | Phone: +1-617-542-5942 59 Temple Place, Suite 330 | Fax: +1-617-542-2652 Boston, MA 02111-1307 USA | Web: http://www.gnu.org ====== End Forwarded Message ======

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Member authentication
by Austin Mayberry 21 Sep '00

21 Sep '00

What are suggestions for site member authentication in zope? Austin austin(a)tool.net

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Re: [Zope] flat file db, favorite links, and zope
by Dieter Maurer 21 Sep '00

21 Sep '00

sean(a)horse101.com writes: > I have a comma delimited file ... > ... If so, does one of them allow me to use > my existing db file (at least import it)? There will be no problem to import your file. The following external method imports the file and returns the list of its elements. This list can then be processed with "dtml-in": import string def importCommaSeparatedFile(filename): """returns list of items in comma separated file with name *filename*.""" return string.split(open(filename).read(),',') To do the whole work, you have to learn something about Zope, external methods, "dtml-in" and maybe Z SQL methods (if your links go into a relational database). You will have to do some homework. Dieter

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Imagemaps
by Karl Munroe 20 Sep '00

20 Sep '00

How can I get to make image maps in zope??

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