March 2000 - Zope - Zope lists

Installation trouble on Solaris 2.6
by Zach Frey 06 Mar '00

06 Mar '00

Hi all, I'm trying to install Zope from source on a Solaris 2.6 system, and I'm running into problems. When I try "./start", I get the following error: $ ./start $ Traceback (innermost last): File "/opt2/local/zope/Zope-2.1.4-src/z2.py", line 436, in ? exec "import "+MODULE in {} File "<string>", line 1, in ? File "/opt2/local/zope/Zope-2.1.4-src/lib/python/Zope/__init__.py", line 94, in ? import ZODB, ZODB.ZApplication, imp File "/opt2/local/zope/Zope-2.1.4-src/lib/python/ZODB/__init__.py", line 85, in ? import sys, ExtensionClass, TimeStamp, cPersistence, Persistence ImportError: ld.so.1: /usr/local/bin/python: fatal: relocation error: file /opt2/local/zope/Zope-2.1.4-src/lib/python/ExtensionClass.so: symbol PyImport_ImportModule: referenced symbol not found I am new to Python, so it's less than obvious to me what is going on here. It looks like the ExtensionClass module is failing to import, but I have no idea how to go about fixing this. [Yes, I know about the precompiled Solaris 2.6 binary. However, I eventually will need to get this running on a Solaris 2.5.1 system. Also, as far as I can tell, the binary release is not set up for Apache integration, which is something I also need to do.] Thanks in advance, Zach Frey

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Refactoring Question
by James W. Howe 06 Mar '00

06 Mar '00

I have a DTML method that I would like to refactor but I'm unsure of the results I'll get. In one of my products, I have a ZClass_add method which has code which does something like this: <dtml-with "ZClass.createInObjectManager(...)"> <do something> <do something else> <dtml-call unindex_object> <dtml-call "method_editCataloger(...)"> <dtml-call index_object> </dtml-with> What I would like to do is yank all the content out of the <dtml-with> block and put it in its own method. I'm thinking that I would like the method to live in my product folder, but I'm open to suggestions. The end result would be something like: <dtml-with "ZClass.createInObjectManager(...)"> <dtml-call initObject> </dtml-with> and the initObject method would be contain <do something> <do something else> <dtml-call unindex_object> <dtml-call "manage_editCataloger(...)"> <dtml-call index_object> My first question is, if I create an initObject method in my product folder, if I call it from within my dtml-with, will it execute exactly the same way as if it were included inline or would it somehow lose the fact that it was executing in the context of the "with" object? I'm thinking that the "with" information is put on the namespace and the namespace will be available with my initObject method is executed, but I want to confirm that my thinking is correct. Alternatively, should I define my initObject as a method of the ZClass itself rather than defining it in the Product folder? Thanks. James W. Howe mailto:jwh@allencreek.com Allen Creek Software, Inc. pgpkey: http://ic.net/~jwh/pgpkey.html Ann Arbor, MI 48103

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Re: zope 2.1.3-1 deb package
by Petr Knapek 06 Mar '00

06 Mar '00

Hi Gregor, sorry that I answer now, but I havn't be on e-mail past few days. I tried to chenge the content of an external method in binary release and it worked as I had written. The zope has seen the change automatically without any additional 'Edit' of the external method. That is the 2.1.3 zope deb package seems to have different functionality. I have to note the binary release was 2.1.2 and not 2.1.3. I havn't tested it with binary release 2.1.3. Petr -- Petr Knápek PVT.NET, e-mail: petr.knapek(a)pvt.net, tel:+420-5-41 558 394 PVT a.s. - pvt.net, Veveří 102, 659 10 Brno, Czech Republic

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RESPONSE.write
by Toby Dickenson 06 Mar '00

06 Mar '00

I've tracked down the problems in using RESPONSE.write with ZServer. The symptoms of this bug are an incorrect Content-Length: 0 header, corrupt output, and no support for HTTP/1.1 clients. The replacement files, relative to 2.1.4, are at http://www.zope.org/Members/htrd/RESPONSE.write/howto (also reported in the collector) Toby Dickenson tdickenson(a)geminidataloggers.com

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Site-Access-Performance-Problem ?
by Martin Grönemeyer 06 Mar '00

06 Mar '00

Hello, we have some strange problems with the "SiteAccess"-Product. We are building up three web-applications on one Zope-Server and three different domains. Everything works fine with the "Site-Access" but if you have more than 5 requests at one of the sites the speed gets very slow and you have to wait about 3-5 and more seconds to get back a simple dtml-document. We made some tests with the __no_before_traverse__ in the url and found that there isn't that speed-problem if we access the documents direct without use of the virtual-hosting. Has anybody the same problem or an idea how to solve this ? Martin

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[ZGotW] Issue #7 (Open)
by Zope Guru of the Week 06 Mar '00

06 Mar '00

A new issue of "Zope Guru of the Week" is available: =================================================================== Issue #7 -- To ZClass or not to ZClass? =================================================================== Status: Open Zen Level: Chela (4/8) Keywords: ZClasses Submitted by: Tres Seaver tseaver(a)palladion.com ------------------------------------------------------------------- When building a Product using ZClasses, I often want to create a "root" ZClass, which the manager will create in a normal folder, and which will then expose the Product's other ZClasses in its Add list. The DTML methods for the root are thus defined within this root ZClass. The Product ends up looking like:: Control Panel +- FooProduct + FooItem_add_permission +-FooRoot +- FooItem +- FooItem_add +- FooItem_addForm +- FooItem_factory .... +- index_html +- some_root_method_dtml + FooRoot_add + FooRoot_addForm + FooRoot_Factory + FooRoot_add_permission * What are the drawbacks to this approach? * Suggest alternatives. ------------------------------------------------------------------- To reply and win undying glory and mondo guru points: http://zope.palladion.com/demos/ZGotW/7

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[ZGotW] Issue #6 (Closed)
by Zope Guru of the Week 06 Mar '00

06 Mar '00

The current issue of "Zope Guru of the Week" has closed: =================================================================== Issue #6 -- standard_manage_header =================================================================== Status: Closed Zen Level: Disciple (3/8) Keywords: Management Interface Submitted by: Dylan Jay djay(a)innocent.com ------------------------------------------------------------------- When I create a ZClass with my own management methods they will by default use standard_html_header etc. This doesn't look like the standard management interface. I think we should have a standard way of making all management interfaces look the same. In fact this should be able to be changed for any subset of management interfaces so you could for instance change the way the standard zope interfaces look. *Ed. I split Dylan's proposed solutions into a separate reply.* ------------------------------------------------------------------- Reviewed by: Tres Seaver tseaver(a)palladion.com ------------------------------------------------------------------- Dang! Another "lead zepplin" topic! Perhaps everyon was holding off because they expect that the management interface is merely a short-term, necessary evil, to be replaced RSN by: * The "Zope Studio":http://www.zope.org/Resources/Mozilla/index_html project, which uses Mozilla's way cool XUL technology to build "Zope-aware" chrome in the browser? or: * The upcoming Model-View-Controller "re-archictecture":http://www.zope.org/Resources/Mozilla/ZWiki/ModelViewController project, which works to divorce the HTML presentation (the "view") from the underlying Python objects (the "model"); this is enabling technology for ZopeStudio, the "ZIE":http://www.zope.org/Members/johanc/ZIE/ZIE-demo cognate for InternetExplod^Hrer, a wxPython and XML-RPC client like the one Amos Latteier "demonstrated":http://www.zope.org/Members/Amos/XML-RPC or: * The "Portal Toolkit":http://www.zope.org/Products/PTK, which replaces much of the current management interface with new "wizard"-based configuration tools. I'll close by thanking Dylan Jay for suggesting the topic, and for his thoughts on potential solutions. Keep those cards and letters coming! -------------------------------------------------------------------

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tree and dtml-with only not working for me
by Andy Heath 06 Mar '00

06 Mar '00

There's something funny about this tree tag. When this code is inside a tree tag it doesn't prevent acquisition. Code ---- <dtml-with this only> <dtml-var rubbish> </dtml-with> What do I need to do to make this work - should it be this.somethingOrOther? Also, anyone suggest what X I could put in <dtml-var X> to enable me to see something to help me figure out what goes on with these namespace things Andy Full code for the tree below <dtml-tree expr="lists" branches=objectValues sort=order> <dtml-if "meta_type=='Folder'"> <dtml-var title_or_id> <dtml-else> <dtml-if "kind=='discussion'"> <A HREF="<dtml-var listURL>"> <dtml-var title_or_id></A> <dtml-else> <dtml-with this only> <dtml-var rubbish> </dtml-with> </dtml-if> </dtml-if> <dtml-if listinfo> (<dtml-var listinfo>) </dtml-if> </dtml-tree> -- ------------------------------------------------- Andy Heath a.k.heath(a)open.ac.uk The Open University +44 (0) 114 2885738

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A zope fear...
by jiva＠devware.com 06 Mar '00

06 Mar '00

Several times I have heard folks mention a fear of "not being able to get my files OUT of zope once they are in there." And usually the answer is "Well just back up your Data.fs file and don't worry about it." I think perhaps this answer doesn't actually address the root concern. I think the root concern is one that I am actually coming up against right now in debates about using Zope for a project. That is, if I stick with scripting languages or other traditional languages, if I need to, I can always fall back on text processing tools to make large global changes to my projects. How can I do this with zope? Many of us programmers are taught to learn to manipulate text like magic. Zope seems to take that power away from us. So, the real heart of my question here is: I just spent 3 months building a web site using Zope. Suddenly, we decide to change our database schema, and I now have to go through and change all 400 of my SQL methods in zope. How can I automate this process? How can I do this just like a good-ole multi file search and replace? Answers that don't count are: Use the find mechanism built into zope. - It's not powerful enough for this. Another: Your design shouldn't have relied on something that would change. - Well, it happens, now how do I fix it? A secondary question here is, what about "software configuration management" and zope? What if I need to return to an exact version of my web site for testing a certain bug that's now cropped up at a customer site. What's the easiest way to automate keeping old versions around without having to roll back my current changes. That is, without using the built in versioning? (Sorry, CVS *is* more powerful in some cases) -- Laugh when you can; cry when you must.

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Zope file upload problem
by Alexander Limi 06 Mar '00

06 Mar '00

Zopistas, I have a small problem here regarding uploading of files. We're setting up a site where people can upload their MP3 files. We've tested everything on our site, and everything seemed to work fine - until people started uploading with modems. They get timeouts, server not found etc. after around 5 minutes of uploading. First we thought that it might be because of our proxy setup with apache or - less likely - the external python method that handles the file, but when I dug out my old 14.4Kbps modem and tried uploading a 4MB file directly into Zope at port 9090, I got the same errors. Is there any kind of timeout settings in the ZServer I can tweak? Or is there something else going on? Please help! This is very frustrating, as 90% of our users are modem users... Thanks in advance, Alexander Limi http://mp3.no For reference, our setup is as follows: We run an apache server which forwards all requests to mp3.no:80 to login.mp3.no:9090. In other words, we use apache as a proxy for the ZServer. When we try to upload a file from our own computers (10Mbit network connection), all is fine and dandy. But when modem users try, or if we try with extraordinarily large files, we get the following error: Proxy Error The proxy server received an invalid response from an upstream server. The proxy server could not handle the request POST /artists/testartist/testtrack/add_mp3. Reason: Error sending from remote server. Apache/1.3.9 Server at mp3.no port 80

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