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ZGDChart: Data Method tab is empty and other questions
by Panos Hilaris 22 Nov '01

22 Nov '01

Greetings to everybody! I have installed ZGDChart-0.6.1.babel.tgz in the Products. I am using Zope 2.4.1 in linux. I create ZGDChart objects in folders, but the ``Data Method'' tab is always empty, so it seems I can not bind the chart to some query, even though appropriate queries exist in the same folder as a ZGDChart object. The gdchartdemo example (imported from file gdchartdemo.zexp of older release: ZGDChart-bin-0.5.tar.gz) seems to work fine (charts appear as expected), but the ``Data Method'' tabs are again empty, so there is no obvious way how graphs are binded to queries. Another problem: I can not use the example at: http://www.zope.org/Members/teyc/ZGDChart/ZGDChart-example.gz/view (it does not seem to be a gzip file). And one more general question: Is there a way to specify a runtime query for the graph? Something like a zgdchart_runtime_query argument at the argument of the chart method, just like the zgdchart_runtime_title argument for changing the title of the graph. In fact, it seems to me such that a method, i.e., specifying the data to be presented in the code, and not using the ``Data Method'' tab, is better for my purposes. Thanks in advance, Panos Hilaris

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RE: [Zope] Urgent help needed: Zope falls over under moderate loa d
by Toby Dickenson 22 Nov '01

22 Nov '01

>> Zope's http implementation is *not* *robust* enough to be exposed to >> the raw internet. It has a number of serious, and fairly obvious >> denial-of-service vulnerabilities. >Toby, are these vulnerabilities in the collector? If not, and you've >got the time, could you put them in there? Some of them were in the old collector. I dont think it would be humanly possible to list them all. Its more than a few bugs which individually may be fixable... Zope's http layer simply wasnt designed with this kind of robustness in mind, and its only a small exaggeration to say that *everything* is wrong. Also, Im not sure its worth the effort. This isnt the only compelling reason for using a font-end proxy. Using a proxy makes this problem a non-issue, so why bother fixing it?

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RE: Caching...
by Michael Fraase 22 Nov '01

22 Nov '01

I wasn't going to respond to this, but I can't resist. Comments inline below. -- Michael Fraase ARTS & FARCES LLC mfraase(a)farces.com www.farces.com PGP Fingerprint: 3D85 F3F4 9E65 4949 176A 260C CB47 190D C864 9A96 > -----Original Message----- > > This discussion is so pointless... Pointless to whom? I'm learning a good bit. > > FYI Google has upwards of 10.000 (thats TEN THOUSAND) linux > machines serving as frontends for their service. And although > Google's pages are dynamic, they're basically the same script > run over and over again with little or no images. So caching is not > the only option; its just that I'm sure you dont have Google's budget. > > What you're trying to do is asking Zope to DYNAMICALLY generate > Squishdot pages (probably full of database accesses and images). But > you're doing this on a PC (no hardware specs were specified) running > Windows (!) and on a DSL line. Hardware specs were most certainly provided (P3 850MHz 768MB RAM). I hate to be put in the position of defending Microsoft, but the OS didn't fall over. Neither did my DSL connection. Zope did. As of about 8:00 PM CST today my site has served more than 120,000 pageviews. Not bad, and it's settled down now, but I was having to restart Zope every hour or so for most of the day. > > If you try to do something similar with ANY OTHER platform (lets say > Apache+PHP+PHPNuke; or IIS+ASP+some forum software or other) > you're also going to get into the same kind of problems. Agreed. But I'm not sure the other options would fall over. > > If you compound this with the fact that you're also clueless (e.g running > Zope without knowing what -S is for; or, for that matter, running any > software without knowing what you're doing), you're in for a lot of trouble. > Please, dont answer "I'm a writer, not a programmer". THAT is precisely > your problem. You want to be able to build rockets without taking a course > in rocket science. Dont misunderstand me; you can still fire rockets or > build amateur rockets; just dont try to reach the moon. First of all, I never claimed to be cluefull. That's why I came here and asked the question. But neither am I clueless. The -S switch has been bothering me for a while. Do a search on zope.org for "command line switches" nothing. Nothing in any of the Zope documentation that I can find. Nor in any of the three Zope books currently in print. Even the Windows-specific doc doesn't say anything about the -S switch. Being a writer/information architect isn't my problem. Nor is it relevant to this issue. Get used to it; we're here and we need your help. But you need our help just as much. And to use your metaphor, I have no interest in building rockets, only flying them. Better get used to that too; there are a lot more of us than there are of you. > > Here are some tips: > > - enable caching on Zope Done and already cited. > - change from Windows to Linux Maybe, but again, Windows didn't fall over--Zope did. > - install more RAM on your PC 768Mb is the maximum I can install in what I've got. Should be adequate. There's no evidence of not having enough memory caused Zope to fail. > - get more CPU for your PC Again, there's no evidence that lack of CPU horsepower caused Zope to fail. > - put Squid in front of your Zope Excellent advice for Linux users. > - fine tune your Zope to use only the necessary command line switches So what's -S for? As stated in a previous message the only other switches I'm using set the web port and the WebDAV port. > - pack your Zope database frequently I do. At least weekly, sometimes daily, today it was every few hours. > - stop all the other software that you might have running (i.e. dedicated > server) Zope's all that's really running. > - create static versions of the most accessed page(s) That's a good idea. > - you might have a memory leak somewhere; plug it > > We're running a consumer portal with about 1 million hits per day using > 2 frontends (regular PC machines) connected to 1 backend (server PC). > > C U! > > -- Mario Valente

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Reading cookie strings in Zope
by Mark Spencer 22 Nov '01

22 Nov '01

Can anybody show me where there is some good example code of how to read from multiple keys in a cookie (using Zope)? I can get saving of multiple keys to work in Zope, but I don't know how to read and process the multiple saved items in a cookie (to update the users preferences for the layout of a dhtml page) regards, Mark Spencer, Blazer Technologies P/L. email: markwspencer(a)bigpond.com

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Nice mention of zope
by Oliver Bleutgen 22 Nov '01

22 Nov '01

Just found that, a press release from EuroLinux Alliance: http://linuxtoday.com/news_story.php3?ltsn=2001-11-21-021-20-PR-LL "EuroLinux welcomes this move. An EU country now officialy endorses open standards and open source / free software through an application law. It confirms the adoption of open source / free software within European public administrations. For Harmut Pilch, president of the FFII, "projects including the GnuPG cryptographic software, the SLIS communication server for schools, the Mioga toolkit for extranet or the Yihaw portal component for Zope have proven that the use of open source / free software through customisation and maintenance contracts between public administrations and commercial software companies is an efficient and sustainable economic model for software infrastructure."" FFII is "Förderverein für eine Freie Informationelle Infrastruktur" something like foundation for a free infrastructur of information cheers, oliver

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RE: [Zope] WEBDAV
by sean.upton＠uniontrib.com 22 Nov '01

22 Nov '01

It works; you need to specify the client you are trying to use, as some clients are non-standard, or do funky things. Most clients should work without problem, AFAIK... Sean -----Original Message----- From: netadmin [mailto:netadmin@technifind.com] Sent: Wednesday, November 21, 2001 5:30 PM To: zope(a)zope.org Subject: [Zope] WEBDAV Is webdav just pre-beta or what? It just doesn't seem to be working right at all. Is there a Zope-Webdav tutorial or faq or something I can get my hands on that might help me? Thanks ahead of time for any help, Luis.

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RE: [Zope] Urgent help needed: Zope falls over under moderate loa d
by sean.upton＠uniontrib.com 22 Nov '01

22 Nov '01

There really does seem to be a popular demand for a HOWTO, and I have a need to put on together for my coworkers as well, so I'll likely put one together in the next few weeks... for now, there should be bits and pieces of messages from me in the list archives to piece some of the picture together. Sean -----Original Message----- From: Richard Jones [mailto:richard@bizarsoftware.com.au] Sent: Tuesday, November 20, 2001 6:22 PM To: sean.upton(a)uniontrib.com; kedai(a)kedai.com.my Cc: zope(a)zope.org Subject: Re: [Zope] Urgent help needed: Zope falls over under moderate loa d On Wednesday 21 November 2001 13:06, sean.upton(a)uniontrib.com wrote: > Squid load balances ZEO clients using a round-robin approach. Squid does a > name lookup using DNS or /etc/hosts, and caches those values, so when you > run Squid as an accelerator, it will round-robin between all IPs it has in > its IP cache for a given domain name. Virtual hosting is handled using a > VHM in Zope, and a redirector in Squid (fills same role as mod_rewrite in > Apache). With a redirector, you do not need to specify virtual in the > httpd_accel_host option, as it is ignored for rewritten URLs... pyredir is > a very easy to modify redirector written in Python... With Squid in front > of Zope, you can use accelerated HTTP cache managers to explicity tell > Squid cache info, along with any RAM cache managers you need... Don't suppose you'd be up to putting this in a HOWTO on zope.org? This, like many aspects of high-volume serving, seems to be something that people usually have to discover for themselves, the hard way... Richard

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stopping acquisition
by Stephan Goeldi 22 Nov '01

22 Nov '01

Probably a newbie question: how can I stop acquisition from a certain point? e.g. when I have a folderish object which contains about 100 documents. The folderish object has a property. I don't want that the 100 documents take over this property. Can I manage that other than editing all the 100 properties? It would be cool if I could stop it like in the security settings _________________________________________________________________ Get your FREE download of MSN Explorer at http://explorer.msn.com/intl.asp

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WEBDAV
by netadmin 22 Nov '01

22 Nov '01

Is webdav just pre-beta or what? It just doesn't seem to be working right at all. Is there a Zope-Webdav tutorial or faq or something I can get my hands on that might help me? Thanks ahead of time for any help, Luis.

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[ZClass constructor question]: How can I copy objects into my container class?
by Simon Brogden 22 Nov '01

22 Nov '01

Hi All, I'm (banging my head against the desk) writing to write a ZClass that inherits from ObjectManager and can contain other objects (DTMLMethods & Images). When an instance of the class is created I want to copy/create a couple of default DTML methods inside the instance, so the user can modify them. Trouble is, the methods appear at the same nesting level as the class is created at, not contained within it. I'm putting the create/copy call inside the class constructor method: <dtml-call "manage_addProduct['OFSP'].manage_addDTMLMethod(....)> I've trawled the how-to's & the example products (the "How to: Build a searchable job board" is excellent BTW) to no avail. Does anyone know where I'm going wrong? Cheers, Simon.

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