October 1999 - Zope - Zope lists

Re: [Zope] Browser Sticky Fingers
by Duncan Booth 20 Oct '99

20 Oct '99

> What if the image object had an expires property that, when set, would > include those headers, and when unset would be 'normal' non-expiring > images? By default, the property would be unset, of course. This seems, > IMHO, to be a zopish way of doing it. A zopish way to do it might be to define a DTML Method called 'expired' that sets the expired header and then returns the object you originally wanted. This seems to work for images: <dtml-var "RESPONSE.setHeader('Expires', '1 January 1970')"> <dtml-return "PARENTS[0].index_html(REQUEST, RESPONSE)"> If you have an image .../somepath/image.gif and 'expired' is somewhere in 'somepath' or above, you can simple retrieve .../somepath/image.gif/expired to get a pre-expired image. In netscape you can view the image info for the expired and normal versions of the image and see that the expiry date changes accordingly. -- Duncan Booth duncan(a)dales.rmplc.co.uk int month(char *p){return(124864/((p[0]+p[1]-p[2]&0x1f)+1)%12)["\5\x8\3" "\6\7\xb\1\x9\xa\2\0\4"];} // Who said my code was obscure? http://dales.rmplc.co.uk/Duncan

1 0

Re: [Zope] Browser Sticky Fingers
by Anthony Baxter 20 Oct '99

20 Oct '99

>>> "Jeff Rush" wrote > I'm pulling my hair out here over what is probably a simple HTTP issue. > I have a Zope method that stuffs a new image into a Zope Image object, > based on the content of the page where the method is called. > > The problem is that the image is not updated until I exit the browser, > and then flush all of it's caches manually. > > I've turned off any proxy support, configured Netscape 4.x with the [...] > Am I missing something simple? Yep. Browsers suck. They cache images regardless. The disgusting hack is to always call your image with the current time in the URL - eg. <img src="/your/image/method?dummy_ts=<dtml-var "ZopeTime().timeTime()">"> /your/image/method should feel entirely free to ignore dummy_ts. This way the image has a different URL, and so the browser doesn't use a cached one. When you're producing on-the-fly live statistics as a graph, this hideous misfeature is a complete pain in the clacker. Anthony -- Anthony Baxter <anthony(a)interlink.com.au> It's never too late to have a happy childhood.

2 1

RE: [Zope] Dynamically Accessing Subfolders
by Ian Blenke 20 Oct '99

20 Oct '99

On Oct 19, 1999, James W. Howe wrote: > Is there a method that I can call for a folder which will give me it's > subfolder names? I'm assuming that if there was such a method, I could use > a dtml-in tag to iterate over the results. If there is such a method, what > does it return and how could I use that information to send a message to > each subfolder in turn? The method is called "objectValues". You can pass it a list of objects you wish to enumerate within a container (an object manager). Here's a snippet of code that will do what you want: <dtml-with A> <dtml-in "objectValues(['Folder'])"> <dtml-with sequence-item> <dtml-var myName><BR> </dtml-with> </dtml-in> </dtml-in> The "with A" ties the list to start from the root - so you will always get the full list of objects anywhere in the tree. It's been 4 days, and I'm starting to get the hang of things :) - Ian C. Blenke <icblenke(a)2c2.com> <ian(a)blenke.com>

4 3

Re: [Zope] Browser Sticky Fingers
by Jeff Rush 20 Oct '99

20 Oct '99

Hmmm, I'm staring at web sites that -do- update their graphic content, such as weather display sites and the MRTG (network graph stats) program, and I don't see anything like a variable URL. How do they manage it? The only new item I see is the use of: <META HTTP-EQUIV="Refresh" CONTENT=300> <META HTTP-EQUIV="Expires" CONTENT="...a date"> While this would cause the HTML to refreshed periodically, how are they getting the browser to re-fetch the *images*? I've captured the HTML source for several iterations and the <IMG SRC="blah"...> part never changes, so I would expect the same graphic would keep appearing on each cycle. -Jeff Rush On Tue, 19 Oct 1999 09:16:24 +1000, Anthony Baxter wrote: >Yep. Browsers suck. They cache images regardless. The disgusting >hack is to always call your image with the current time in the URL - >eg. <img src="/your/image/method?dummy_ts=<dtml-var "ZopeTime().timeTime()">"> >/your/image/method should feel entirely free to ignore dummy_ts. > >This way the image has a different URL, and so the browser doesn't >use a cached one. > >When you're producing on-the-fly live statistics as a graph, this >hideous misfeature is a complete pain in the clacker.

5 5

RE: RE: [Zope] comparing Zope with Vignette, IPS and others
by Martin van Nijnatten 20 Oct '99

20 Oct '99

If anyone is interested in a overview from IPS, I have a more in-depth PDF file from futuretense's previous website. Now they've merged with Openmarket it's not there anymore. If anyone is willing to compare features to Zope, just send me an e-mail and I will send it to you. Martin Martin van Nijnatten euroibc(a)solair1.inter.NL.net

2 1

RE: [Zope] howto wrap a perl script
by Slaets, Maarten 20 Oct '99

20 Oct '99

hi loren, thanks! btw do you know of an ssh-client also? (no the other server is plain apache) Maarten Slaets KPNQwest Belgium Contact info: http://www.fonky.com/vcard/MaartenSlaets/ > -----Original Message----- > From: Loren Stafford [mailto:lstafford@icompression.com] > Sent: dinsdag 19 oktober 1999 20:22 > To: Slaets, Maarten; zope(a)zope.org > Subject: RE: [Zope] howto wrap a perl script > > > I'm not clear about whether the "other server" is running Zope or not. > Either way you may find this How-To on ZClient useful: > > http://www.zope.org/Members/lstaffor/ZClientMethod > > -- Loren > > > > -----Original Message----- > > From: zope-admin(a)zope.org [mailto:zope-admin@zope.org]On Behalf Of > > Slaets, Maarten > > Sent: Tuesday, October 19, 1999 10:03 > > To: 'zope(a)zope.org' > > Subject: [Zope] howto wrap a perl script > > > > > > hi, > > > > i'm going to execute a perl script on another server, and i > would like to > > know how to: > > 1/ wrap a zope (pyhton) method around it so i can use zope to manage > > authorization > > 2/ display the scripts output to the zope user. > > > > Any ideas on how to do this? or links to useful information? I > > haven't found > > any howto's for this, and you would've guessed: i'm not a > pyhton hacker. > > > > BTW, many thanks for the help on the MySQLdb problem. (I even > > tried kicking > > the sysadmin, but nogo :) > > > > Maarten Slaets > > KPNQwest Belgium > > Contact info: > > http://www.fonky.com/vcard/MaartenSlaets/ > > > > _______________________________________________ > > Zope maillist - Zope(a)zope.org > > http://www.zope.org/mailman/listinfo/zope > > > > (Related lists - please, no cross posts or HTML encoding! > > > > To receive general Zope announcements, see: > > http://www.zope.org/mailman/listinfo/zope-announce > > > > For developer-specific issues, zope-dev(a)zope.org - > > http://www.zope.org/mailman/listinfo/zope-dev ) > > >

1 0

Zope Book
by Tom Deprez 20 Oct '99

20 Oct '99

Euhm, people who want to know about a Zope book can have a look at http://zdp.zope.org/ZBookStatus Regards, ZDP

1 0

dtml-tree based on a recursive SQL table
by Philipp Auersperg 20 Oct '99

20 Oct '99

Hi! given a recursive table named <<Category (CategoryID int primary key,parentID int foreign key references Category.CategoryID,name varchar(30)) >> I would like to display that table with the tree tag. On the top-level it should display the categories where parentid=0, for each branch there should appear the categories with their parentID pointing to the categoryID of the branch and so on... (I hope you understand). I scanned all the docs but did not find any solution. I started with: <dtml-tree branches_expr="Category()"> <dtml-var name> </dtml-tree> (Category is a Z SQL method returning the whole table) this displays the top level records but of course not the subcategories. How can I bring the recursion into that ? Thanks in advance Philipp Auersperg

3 4

Defining permissions in a base class
by Itai Tavor 20 Oct '99

20 Oct '99

Hi, I have a base class that defines some methods and creates some management screens, and is registered using registerBaseClass(). I subclass this base class in several products that add the base class screens to their manage_options. I want the base class to define permissions to control access to these screens and to the class methods. Anything defined in __ac_permissions__ in the base class is ignored completely. If I register this class as a regular class rather than a base class, the permissions appear in the security tab of folders, but they don't affect access in any of the products. I really want to avoid repeating the permission definitions in every new class that uses this base class. Is there any way to include the permissions of a base class in new classes? Thanks, Itai -- Itai Tavor -- "Je sautille, donc je suis." -- itavor(a)vic.bigpond.net.au -- - Kermit the Frog -- -- 'Supposing a tree fell down, Pooh, when we were underneath it?' -- -- 'Supposing it didn't,' said Pooh after careful thought. --

1 0

Re: Mail Archiving
by Michael Rose 20 Oct '99

20 Oct '99

Bruce Dillahunty writes: >I have (or have borrowed :-)) code that will mostly >XMLize an RFC822 message, then put it in Zope... I >think, if I or somebody can ever get the properties >stuff for XML documents to work correctly, then you've >got your database, a file format that is transferrable >to whatever (XML), with all the headers broken out, >searchable, linkable to others (chain up the >references maybe???), etc. There are people developing XML-RPC specs for email, check the discussion at http://www.xmlrpc.com/discuss/msgReader$598 There's a link to a draft proposal by Eric Soros on the page. HTH Michael ************************************************ Michael Rose Center for Tele-Information, Technical University of Denmark mailto:rose@tele.dtu.dk http://www.cti.dtu.dk/personal/rose Multimedia in the Home - http://mmhome.cit.dk 'and what is the use of a computer' thought Alice 'without pictures or conversation' with apologies to Lewis Carroll *************************************************

1 0