April 1999 - Zope - Zope lists

RE: [Zope] Anonymous User-sessions
by Michel Pelletier 02 Apr '99

02 Apr '99

> -----Original Message----- > From: Johan Carlsson [mailto:johanc@torped.se] > Sent: Friday, April 02, 1999 5:30 AM > To: zope(a)zope.org > Subject: [Zope] Anonymous User-sessions > > > > > Hi all, > I new at this list, my name is Johan Carlsson. > > I been wondering about user-session in Zope. > > How is the session-feature in Zope implemented? > Is it using Cookies? > Hello Johan. The idea of a Zope sessions is not the kind of session your talking about here. In the next release, 1.11, Sessions will be called Versions to clear up this confusion and to free up the object namespace so we can support "real" sessions like your asking about. What Zope calls Sessions (Versions) let you work in an area of your Zope system and edit/break/change it without the changes being reflected to anyone else until you save the session (version). The kind of Sessions it sounds like your looking for are not implimented yet. There are some very sticky issues that need to be thought out completely. We don't like to impliment solutions without making sure that the solution is general enough to be uselful in all problem domains. This kind of thinking is why Zope is so cool in the first place. For now, if you want to keep session-like information laying around you'll need to home grow your own based on whatever mechanism you prefer. Please be sure to let us know what kind of system you come up with so we can consider it in our implimentation of "real" Sessions. It looks like John Jarvis posted an interesting Cookie Cutter Product this morning, you might want to look into that (I haven't yet). -Michel > Can I use it for user-session with anonymous users > to remember user-session-data, or are the a better > way to implement it (raw-cookies?). > > I am usually using Microsoft's IIS/ASP with the application- > and session objects which is quite convenient. > > > //johan > > > > torped > johan carlsson > birkagatan 9 > 113 36 stockholm > telefon 08-32 31 23 > mobil 070-558 25 24 > fax 08-32 89 47 > johanc(a)torped.se > > > _______________________________________________ > Zope maillist - Zope(a)zope.org > http://www.zope.org/mailman/listinfo/zope > > (For developer-specific issues, use the companion list, > zope-dev(a)zope.org - http://www.zope.org/mailman/listinfo/zope-dev ) >

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XML and Object Oriented DBMSes
by Robert OConnor 02 Apr '99

02 Apr '99

There is a good article in InfoWorld at http://www.infoworld.com/cgi-bin/displayStory.pl?/features/990329xml.htm titled: "XML buoys databases for corporate markets Web and XML keep object-oriented databases afloat in a world gone relational" by: Brett Mendel This may be a good basic reference to put in zope to promote the OOP point of view. I like this: ***copy "I think it's a matter of efficiency, compactness, and directness," said Rita Knox, vice president and research director at the Gartner Group, in Stamford, Conn. "It's not that these things can't be done with an RDBMS, it's just much more efficient with an ODBMS." RDBMSes, for example, use rows and columns for every instance in the database, regardless of whether a particular cell is needed in a particular instance; ODBMSes only store the particular parts of the data actually used in any specific instance, Knox explained. ***end copy- bobo connor bob(a)rocnet.com

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Cookie Cutter Product
by TFE MMS JARVIS JOHN 02 Apr '99

02 Apr '99

Hi All! One of the applications I am working on is a database client with a bunch of search screens and some fairly dynamic SQL. The search items themselves are selected from other query results necessitating a mechanism for data to be saved between HTTP sessions. I considered saving the data in a database and sending a cookie ID to the client which seems to be the norm, but for what I wanted it seemed like a bit of overkill. Maybe it's not, but anyway... Also, most of the documents use sets of data that are different for each user and need to be accessed with each request. So, I tried to save everything in cookies. This would eliminate the need for DB management on the server side and give the documents the data they need at the expense of slightly higher network traffic (not much of a problem on my company intranet). Well, I ran out of cookies. As you all probably know, the cookie spec calls for a browser to only handle 20 cookies per server. So, being the type that tends to just hit things harder when they don't work the way he wants them to, I wrote the CookieCutter Product. The CookieCutter Product manages a dictionary of objects. The objects are assigned to the dictionary keys, pickled, and added to REPONSE.cookies. It is unpickled from REQUEST.cookies and, if desired, the dictionary items are mapped into the REQUEST namespace where they can be then used as normal attributes. This allows the storage of a number of arbitrary objects in a single cookie. Cookies have a 4KB limit so I don't know how far this can go before either the browser or the user gags but, for what I'm using it for anyway, it works well. I'm still a bit new at all this so, for all I know, it could be a really braindead idea. Is anyone interested? Comments? John Jarvis Tokyo Electron FE, Ltd.

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Re: [Zope] dtml access to the instance data
by Andrey V Khavryutchenko 02 Apr '99

02 Apr '99

Hi, Oleg! >>>>> "OB" == Oleg Broytmann writes: OB> Hi! On 2 Apr 1999, Andrey V Khavryutchenko wrote: >> import DocumentTemplate >> >> class Test: >> title = 'Test page' >> index_html = DocumentTemplate.HTMLFile('test.dtml') >> >> t = Test() >> print t.index_html() OB> After creating template, you should call it: OB> print t.index_html(...my-data-here...) Ok, I've changed my test and it worked (btw, there was another typo, sorry). Is necessary data substituted automaticaly by ZPublisher? I mean, will the test return desired age if called through web? OB> If you need an example, I can send you ZIP-file with some examples. Yes, it would be a great help. Thanks! -- SY, Andrey V Khavryutchenko http://www.kbi.kiev.ua/~akhavr Shick's Law: There is no problem a good miracle can't solve.

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dtml access to the instance data
by Andrey V Khavryutchenko 02 Apr '99

02 Apr '99

Hi! I'm having strange problems with simple dtml example: ===== test.py # -*- python -*- file # $Id$ # # Copyright (C) 1999 by Andrey V Khavryutchenko <akhavr(a)compchem.kiev.ua> import DocumentTemplate class Test: title = 'Test page' index_html = DocumentTemplate.HTMLFile('test.dtml') t = Test() print t.index_html() ===== test.dtml <html> <head><title></title></head> <body> <p>This is a test </body> </html> [akhavr@netmaster] ZTemplates-2.3.0$ python test.py Traceback (innermost last): File "test.py", line 13, in ? print t.index_html() File "DocumentTemplate/DT_String.py", line 514, in __call__ return render_blocks(self.blocks,md) File "DocumentTemplate/pDocumentTemplate.py", line 244, in render_blocks if type(section) is StringType: section=md[section] File "DocumentTemplate/pDocumentTemplate.py", line 209, in __getitem__ v=self.dicts[key] File "DocumentTemplate/pDocumentTemplate.py", line 178, in __getitem__ raise KeyError, key KeyError: head Obviously, I do not understand some fundamentals. Can anyone give me a hint? TIA. -- SY, Andrey V Khavryutchenko http://www.kbi.kiev.ua/~akhavr Shick's Law: There is no problem a good miracle can't solve.

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Anonymous User-sessions
by Johan Carlsson 02 Apr '99

02 Apr '99

Hi all, I new at this list, my name is Johan Carlsson. I been wondering about user-session in Zope. How is the session-feature in Zope implemented? Is it using Cookies? Can I use it for user-session with anonymous users to remember user-session-data, or are the a better way to implement it (raw-cookies?). I am usually using Microsoft's IIS/ASP with the application- and session objects which is quite convenient. //johan torped johan carlsson birkagatan 9 113 36 stockholm telefon 08-32 31 23 mobil 070-558 25 24 fax 08-32 89 47 johanc(a)torped.se

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Learning...
by Tom Deprez 02 Apr '99

02 Apr '99

I'm still learning... sorry! Are there special methods in Zope to enter data into a database? How can we enter data in a database with the help of Zope? Thanks, Tom.

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ZServer & No luck
by Daren Sefcik 02 Apr '99

02 Apr '99

> ZopeHTTPServer does not support virtual hosting. It is really a very > simple server based on CGIHTTPServer. ZServer *does* support and > supports it rather well. Checking out Sam's Medusa site > http://www.nightmare.com/medusa. It might be handly to fetch yourself a > full copy of medusa and play with it. It is really very cool. I tried ZServer and when I start it up I get: cx757770-a >./start.py log: adding channel <trigger at 8108c70> Traceback (innermost last): File "./start.py", line 20, in ? import zope_handler File "./zope_handler.py", line 121, in ? from PubCore import handle File "./PubCore/__init__.py", line 86, in ? import ZRendezvous File "./PubCore/ZRendezvous.py", line 88, in ? from ZServerPublisher import ZServerPublisher File "./PubCore/ZServerPublisher.py", line 86, in ? from ZPublisher import publish_module ImportError: No module named ZPublisher cx757770-a > It wants ZPublisher...help anybody?? Daren

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editing
by Tom Deprez 02 Apr '99

02 Apr '99

Hi, I'm wondering. Is everybody using the Zope interface for writing the web-pages? I find it really difficult, unhandy to use that edit-box. So, as I read in the manuals, I can use the Composer of NetScape. I tried that, but when I publish a page to Zope and then want to view the page, zope 'hangs'. I mean, netscape keeps browsing to this page (i.e. netscape icon, let's us now it's searching) but never shows it. Also, if I browse with the manage panel to this page, the same problem is there. But, if stop and restart zope, the page is indeed published to Zope.... Anybody a solution? Or which editor does everybody uses for making there pages? Kind Regards, Tom.

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RE: [Zope] DTML question
by TFE MMS JARVIS JOHN 02 Apr '99

02 Apr '99

oh...sorry... I should have known this as it is, in fact, clearly shown in the manual. Thank you much! John. > -----Original Message----- > From: Michel Pelletier [SMTP:michel@digicool.com] > Sent: Thursday, April 01, 1999 11:41 PM > To: TFE MMS JARVIS JOHN; zope(a)zope.org > Subject: RE: [Zope] DTML question > > > > > -----Original Message----- > > From: TFE MMS JARVIS JOHN [mailto:jarvis.sd082@ex.tel.co.jp] > > Sent: Wednesday, March 31, 1999 9:35 PM > > To: zope(a)zope.org > > Subject: RE: [Zope] DTML question > > > > > > I'm still left with a question, though: How would you go about using > > sequence-item, etc. in a python expression? Python sees it as > > 'sequence minus item' and I get a 'Name Error: sequence' exception. > > > >  > > The _[] mapping is a namespace mapping. It is used to access DTML > variables such as sequence-item which aren't very expression friendly. > > -Michel

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