November 2000 - Zope

How small a box can zope run on?
by Alexander Limi 02 Nov '00

02 Nov '00

Hi, Just a quick question: We are building some device controller software and to control those we have a normal 486 with 24MB RAM running linux. Has anybody tried running zope on such a modest setup? There is only going to be one or two users connected to Zope at once, so we don't need much performance in terms of page views per second :) Cheers, Alexander.

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Products : dependencies (or who's on first?)
by Aaron Straup Cope 02 Nov '00

02 Nov '00

Okay, here goes : I installed the PTK product some time ago, decided that it wasn't where I needed to be right now and moved on to something else. Today I finally decided to delete it from my Products folder. Shortly afterwards, I noticed that both my existing FlexFAQ and ZDiscussion objects were "broken" (with the little broken icons in the manager view.) and Zope was spewing errors to STDOUT complaining that it "Could not load oid" (I'm sorry, I don't have the traceback...doh!) I could add new FF/ZD objects but I couldn't access the old ones. I deleted ZDbase and ZDiscussion and restarted Zope. I couldn't import a fresh copy of ZDiscussions.zexp (see error below) but suddenly my old set up is working again. Except I can't create new ZD* objects since the Product isn't installed. ( I can create new FF objects.) In the meantime, when I restart Zope it prints errors about not being able to install the "Wizard" product or the "Demo Portal" Products (see below.) In the meantime, the "PTKDemo" and "PTKBase" Products keep showing up the Products table even though I keep trying to delete them. Can someone please help me understand what on earth is going on? Is the ZODB corrupted? Have I inadvertently set up some level of dependency across Products? I have done Google searches and seen that this has cropped up on the mailing list before, but I can't seem to figure out how to address the problem or insure that doesn't happen again. I am still pretty new to all of this and I am having a hard time understanding the relationship between alot of seemingly abritrary errors. Any help would be very much appreciated. Thanks....eep! a) Starting Zope 2000-11-01T20:01:04 ERROR(200) Zope Couldn't install Wizard Traceback (innermost last): File /usr/local/zope.old/lib/python/OFS/Application.py, line 477, in install_products (Object: ApplicationDefaultPermissions) (Info: Wizard) File /usr/local/zope.old/lib/python/App/Product.py, line 447, in initializeProduct (Object: Products.Wizard) File /usr/local/zope.old/lib/python/OFS/ObjectManager.py, line 264, in _setObject (Object: Traversable) File /usr/local/zope.old/lib/python/OFS/ObjectManager.py, line 272, in manage_afterAdd (Object: Traversable) File /usr/local/zope.old/lib/python/ZClasses/ZClass.py, line 421, in manage_afterAdd (Object: Wizard) File /usr/local/zope.old/lib/python/ZClasses/ZClass.py, line 375, in _register (Object: Wizard) Duplicate Class Ids b) Importing ZDiscussions.zexp Traceback (innermost last): File /usr/local/zope.old/lib/python/ZPublisher/Publish.py, line 222, in publish_module File /usr/local/zope.old/lib/python/ZPublisher/Publish.py, line 187, in publish File /usr/local/zope.old/lib/python/Zope/__init__.py, line 221, in zpublisher_exception_hook (Object: Traversable) File /usr/local/zope.old/lib/python/ZPublisher/Publish.py, line 171, in publish File /usr/local/zope.old/lib/python/ZPublisher/mapply.py, line 160, in mapply (Object: manage_importObject) File /usr/local/zope.old/lib/python/ZPublisher/Publish.py, line 112, in call_object (Object: manage_importObject) File /usr/local/zope.old/lib/python/OFS/ObjectManager.py, line 509, in manage_importObject (Object: Traversable) File /usr/local/zope.old/lib/python/OFS/ObjectManager.py, line 264, in _setObject (Object: Traversable) File /usr/local/zope.old/lib/python/OFS/ObjectManager.py, line 272, in manage_afterAdd (Object: Traversable) File /usr/local/zope.old/lib/python/ZClasses/ZClass.py, line 421, in manage_afterAdd (Object: ZDTopic) File /usr/local/zope.old/lib/python/ZClasses/ZClass.py, line 375, in _register (Object: ZDTopic) Duplicate Class Ids: (see above)

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Mapping tools and Zope - SIG? Fishbowl?
by twiens 02 Nov '00

02 Nov '00

I'm writing to all who responded to my query regarding mapping tools for Zope or others interested in this issue. In one of the responses, was the suggestion to start a SIG or Fishbowl. At this point in time, I'm in a research phase for a project where a mapping interface will be needed in Zope based web application. We are starting to move into the design phase and so some technical decisions will start to be made in the next two months at which point we will begin building something. I've received a number of other interesting replies about GIS and Zope and possible solutions. These have ranged from "I know about this" to "I use this" to "We should build something". I think there might be sufficient interest in at least starting a SIG or Fishbowl or separate list about the problem. Is there?? I'm personally a bit hesitant to even consider building yet another GIS product. There are many of them out their (see www.freegis.org) for web display, cartography, spatial analysis, etc. Obviously our interest here is web interfaces, but these other products are testimony to the ubiquitous nature of the problem; a good suite of comprehensive GIS software solutions just doesn't exist, either for free or commercially (IMHO). The approach my team will likely take on our project will be to examine existing open source products and determine if there is one that is sufficient to meet our needs and simply use it. If we can build some tools around this product to facilitate it's future use with Zope by others, we will open source those. I would welcome the discussion of this issue, since it is important and it is one of the up and coming needs for web applications. I would welcome feedback from others who undoubtedly have significant experience and knowledge to bring to this problem. T -- Trevor Wiens twiens(a)compusmart.ab.ca The significant problems that we face cannot be solved at the same level of thinking we were at when we created them. (Albert Einstein)

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ZOracleDA causing instability
by Petru Paler 02 Nov '00

02 Nov '00

Hi, Just wondering if anyone else sees this: I run a moderately high-traffic (a couple hundred thousand hits/day) with Zope and Oracle (most of the site is forms interacting with the Oracle database, the rest being help/support files for those forms and a couple images). Products used: - FSSession-0-4-2 - GenericUserFolder 1-2-4 - PythonMethod-0-1-7 - SiteAccess-2-0-0b3 - the latest ZOracleDA (the __version__ string in __init__.py says: "$Revision: 1.4 $") Zope 2.2.2 (source release) run with RewriteRule proxying behind apache 1.3.14. Oracle 8.1.6 (aka 8i release 2) installed on the same machine. The problem is that the whole thing is very unstable, and I suspect ZOracleDA to be the culprit. Sometimes the whole Zope just hangs (actually so often, that we are restarting it from cron each 15 minutes, but it's a bad solution since all the GUF cookies are lost and customers are logged out), other times it goes mad and eats lots of memory (I've seen it consuming 800 megs of memory, and the whole unpacked Data.fs is 9 megs!), other times it gives a very strange error: ZSQL methods raise exceptions whose contents is queries ran in other threads!. Does anyone have any ideea of what is happening, and how to fix it ? -- Petru Paler, mailto:ppetru@ppetru.net http://www.ppetru.net - ICQ: 41817235

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Zope & python 2
by Mark Twiddy 02 Nov '00

02 Nov '00

Hi all Is anyone using or know the current state of Zope with python 2.0 ? Thanks Joe

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Re: [Soft] [Fwd: [Zope] Multi-lingual sites and workflow]
by Federico Di Gregorio 02 Nov '00

02 Nov '00

> I was wondering if anyone here has used Zope to create > bilingual/multi-lingual/localised websites. we used to create various multi-lingual websites (one of them is in 8 different ones...) we also developed a product to help localisation, the Translator. you can find it at the zope web site or directly from us (www.mixadlive.com.) ciao, federico -- Federico Di Gregorio [http://www.bolinando.com/fog] {Friend of Penguins} Debian GNU/Linux Developer & Italian Press Contact fog(a)debian.org Best friends are often failed lovers. -- Me

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RE: [Zope] preventing acquisition
by Farrell, Troy 02 Nov '00

02 Nov '00

Sorry. -2 points for lack of clarity (my fault) I thought you were talking about a document. If you want to do something like that you will need to use <dtml-with> inside your documents. The only way I know to prevent a user from doing this by typing a URL is to set some security permissions. You might look at http://www.zope.org/Members/rossl/SpecificContext It is not specific to your problem, but it might help. Troy -----Original Message----- From: Robin Becker [mailto:robin@jessikat.fsnet.co.uk] Sent: Tuesday, October 31, 2000 2:52 PM To: Farrell, Troy Cc: Zope(a)zope.org Subject: Re: [Zope] preventing acquisition In message <DB56BAD3BFCED3119D3100D0B72386560713C41A(a)wcgtule103.wcg.will iams.com>, Farrell, Troy <troy.farrell(a)wilcom.com> writes >Sorry for the blank. That was my mistake. Try the <dtml-with> tag and the >"only" keyword. ... It's quite difficult to get netscape/ie to do a <dtml-with only>! The problem I'm seeing is that in my browser I can use http://localhost/A/B/C correctly, but also incorrectly I can view http://localhost/A/B/C/A/C -- Robin Becker

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Zope.org uptime listed by netcraft
by Philipp Auersperg 02 Nov '00

02 Nov '00

on www.netcraft.com I looked at the list with the websites having the maximum uptime and found - Zope - under the top 10 ! Check it out: http://uptime.netcraft.com/today/top.avg.html phil

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incorporating generated sub-websites within a Zope site
by Fred Yankowski 02 Nov '00

02 Nov '00

I'm looking for suggestions about how to manage a Zope website that hosts some subsites created by tools outside of Zope. Here's the situation. I'm working on a community website (batavians.org) for a small city (Batavia, IL) where I want to allow various non-profit community organizations to manage their own subsites. But the very first test case is proving to be a problem because the manager of the subsite is using web page development tools that seem to make it hard to integrate their subsite with the rest of the site. They can FTP their files up to the Zope server (which I configured to use port 21 for FTP) and their work is accessible just fine given a small "glue" index_html object that bridges to their internal main page. But I got blocked when I tried to add a standard page footer onto their pages. Actually, I was able to add a dtml-var element to pull in a standard footer via acquisition and that works, but the manager of the sub-website has no way to pull that change back to her working version of the subsite. It seems that the lightweight "Web Studio 2.0" tool she's using has no FTP-download function at all. Not only that, it has no way to view/edit HTML at all! It's only possible to edit using a WYSIWYG design view (AFAICT). So she can't merge in the change even if I tell her exactly the HTML code to add. OK, this problem is largely the result of the crappy web-design tool she's using, but I really have no control over that. The subsite manage/author doesn't know HTML and would be completely helpless with Zope's "through the web" editing interface. A better tool such as Dreamweaver would at least allow her to download files and/or edit HTML directly, but that's moot in this case. Even with Dreamweaver I think the DTML tags would be invisible and hard for a non-programmer to deal with. (Not only that, Dreamweaver refuses to open files that don't have an extension, so it won't open index_html for example.) So what alternatives do I have? Is there some way that I can set up a filter such that every page of her subsite goes through the filter before being sent out to the browser, allowing me to tack on a page footer on those pages? I'm sure Zope has such a mechanism, but I don't know where to look. Even with such a filter I'm not keen about having to parse her pages (which are/should-be each a complete HTML document) in order to insert a footer line in the right place. What other schemes should I consider? -- Fred Yankowski fred(a)OntoSys.com tel: +1.630.879.1312 Principal Consultant www.OntoSys.com fax: +1.630.879.1370 OntoSys, Inc 38W242 Deerpath Rd, Batavia, IL 60510, USA

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Help! Zope Crash
by Edward Muller 02 Nov '00

02 Nov '00

I am running a Zwiki site at http://www.handhelds.org:8080/wiki. This site has become invaluable to our growing handhelds.org community as a place to collect information. But, sadly our zope server keeps dying....No idea why.... Sometimes the zope server can be up for a few days, sometimes only a few hours. I am not sure what is causing this or how to go about tracking it down. Is there anything I can do? Any help would be greatly appreciated. -- ...EAM... edwardam(a)home.com edwardam(a)handhelds.org ----------------------- 'It's because crappy programs offend me.' --Eric Raymond

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