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Debugging permission errors: min permissions to add ZClass instance.
by R. David Murray 07 Jan '00

07 Jan '00

I know I've seen this question asked before, but I couldn't find it (is there a better way to search the mailing list archives than the one on the mailing list index page?). I've got a ZClass, and I'm trying to set things up so that a certain set of authenticated users have permission to add new instances of the class and to edit just those instances they have created. I assume that the latter will automatically be possible since they will be owner of the object created. But I can't even get the add to work, despite following the ZClass documentation on setting up permissions. My test user who has the "Add..." permission gets an 'authorization failed' when I try to add an instance. So I'd like to see exactly where the permission check is failing. How do I get Zope to tell me what permission it was looking for when the permission check failed? I also don't understand what the define permissions screen on the product containing the ZClass does; the current Content Manager's Manual's coverage of it is very sparse and uniformitive. I tried mapping "Add..." to "Add..." there, but that didn't help any. And another oddity while I'm here; the role that is given "Add" permission for my class does *not* have Add permission for anything else, yet when a user with only that role goes to the management screen for the folder he is presented with *three* add choices, the other two being "Add ZGadfly Database Connection" and "Add ZPyGreSQL Database Connection". Is this maybe a clue? FYI I'm running this under 2.1.2, with most of the stuff having been created under 2.0.1. --RDM

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Acessing Zclass property outside of class instance.
by R. David Murray 07 Jan '00

07 Jan '00

This should be a simple question, but my understanding of acquisition and name spaces isn't good enough to figure out the answer yet. I have a ZClass, and I have assigned a couple properties to a 'constants' propertysheet. I want to access those constants from a page that is not an instance of the ZClass. Actually, even simpler than that, I also want to access that property from the 'add' method of the product the ZClass was created in. What's the syntax for doing both of these? NB: the non-add case is a DTML method that is in a virthost folder created with the SiteAccess product, so I guess I need some sort of Zope object equivalent of an absolute URL to reference the property? If I could create a Product/ZClass inside a virthost folder then I'd just put the constant property at the top level folder of the virthost, but I can't do that... --RDM

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pgci problem with Zope-1.10.2 and pdflib
by Nuno Maltez 07 Jan '00

07 Jan '00

Hi, I'm having a problem trying to create a with pdflib and pcgi. I'm using Zope 1.10.2 on Linux and using an external method to generate a pDF file which is then returned with an 'application/pdf' mime type. Using ZopeHTTPServer I found no problems at all, but in this site I need to use Apache (Zap). However, I found that with Zap, instead of a nice PDF file I get a pgci error: Fri Jan 7 02:23:35 2000 pcgi-wrapper: unexpected out-of-bound data in stdin t[0] = 80 I think I've traced it to the PDF_close() statement. If I return from the external method before closing the PDF, I get my file but, of course, not complete, so it's no solution. Has anyone experienced any similar problems? Has anyone tried to use pdflib with Zope and Apache? Thanks in advance, Nuno

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Re: Testing products outside of zope (i.e., in python interpreter)?
by Andrey V Khavryutchenko 07 Jan '00

07 Jan '00

Hi, Joe! >>>>> "JG" == Joe Grace writes: JG> Hi, is there a way to test zope products outside of zope? I find that JG> I'm restarting zope just to update my product and test it, and that JG> seems painfully slow. I'd like to just run code outside of zope JG> interactively in a shell. Is that possible? I'm trying with Boring JG> product (super simple) and tripping over the Persistence import JG> Import Error: cannot import name Persistent JG> I've run into this problem before and assume that Persistent is a C JG> function. How do I make it available to my python interpreter? Add the directory, where it's located to sys.path (in Python) or PYTHONPATH environment variable. JG> I couldn't figure out where z2.py gets it, but I also am just dealing JG> with the python environment for the first time. I'm using Xemacs (on JG> NT) if that makes giving some tips any easier. :-) JG> I'll take pointers, tips, how-to reference, anything at this point. JG> I'd be happy to make a How-To if I get enough information. Right now I'm using two-stage aproach. First I build the Data.fs of my site using following script: #!/usr/bin/env python # -*- python -*- file # $Id: build.py,v 1.1.2.1 2000/01/06 15:37:02 akhavr Exp $ # # Copyright (C) 2000 by Andrey V Khavryutchenko <akhavr(a)compchem.kiev.ua> import os, sys, getopt verbose=0 opts, args = getopt.getopt(sys.argv[1:],'v') for o, v in opts: if o=='-v': verbose=1 ZopeLibPath=os.environ['ZOPE_HOME'] sys.path=['', os.path.join(ZopeLibPath,'lib','python'), ZopeLibPath ]+filter(None,sys.path) import Zope root = Zope.app() import src os.chdir('src') src.build(root, verbose=verbose) get_transaction().commit() Then, I run test scripts like the following and compare their output to what it should look like. #!/usr/bin/env python # -*- python -*- file # $Id: register-user_correct.py,v 1.1.2.4 2000/01/06 22:15:26 akhavr Exp $ # # Copyright (C) 2000 by Andrey V Khavryutchenko <akhavr(a)compchem.kiev.ua> request = { 'first' : 'Andrey', 'last' : 'Khavryutchenko', 'email' : 'akhavr(a)compchem.kiev.ua', 'login' : 'akhavr', 'passwd' : 'abracada$%^ra', 'passwd2' : 'abracada$%^ra' } import init site = init.site from mkrequest import * print '*** Main page' site('/') site('/style_css') print '*** Select' site('/register') print '*** Register' site('/register/do' + mkrequest(request)) ==================== init.py #!/usr/bin/env python # -*- python -*- file # $Id: init.py,v 1.1.2.5 2000/01/06 15:37:00 akhavr Exp $ # # Copyright (C) 2000 by Andrey V Khavryutchenko <akhavr(a)compchem.kiev.ua> import os, sys, string ZopeLibPath=os.environ['ZOPE_HOME'] sys.path=['', os.path.join(ZopeLibPath,'lib','python'), ZopeLibPath ]+filter(None,sys.path) import ZPublisher, Zope root = Zope.app() def site(url, d=None): return ZPublisher.Zope(url, d=d) Hope this helps -- SY, Andrey V Khavryutchenko http://www.kbi.kiev.ua/~akhavr Software & SPI Engineer Visit my site Shick's Law: There is no problem a good miracle can't solve.

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Testing products outside of zope (i.e., in python interpreter)?
by Joe Grace 06 Jan '00

06 Jan '00

Hi, is there a way to test zope products outside of zope? I find that I'm restarting zope just to update my product and test it, and that seems painfully slow. I'd like to just run code outside of zope interactively in a shell. Is that possible? I'm trying with Boring product (super simple) and tripping over the Persistence import Import Error: cannot import name Persistent I've run into this problem before and assume that Persistent is a C function. How do I make it available to my python interpreter? I couldn't figure out where z2.py gets it, but I also am just dealing with the python environment for the first time. I'm using Xemacs (on NT) if that makes giving some tips any easier. :-) I'll take pointers, tips, how-to reference, anything at this point. I'd be happy to make a How-To if I get enough information. Thanks in advance! = Joe =

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minor fastcgi bug?
by Sam Gendler 06 Jan '00

06 Jan '00

has anyone else seen a bug where apache sends HTTP headers as the document body every once in a while, when using fastcgi? I am actually using fastcgi within a Virtual Host. I am curious as to whether anyone else is seeing this? --sam

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RE: What does "this()" return?
by Hung Jung Lu 06 Jan '00

06 Jan '00

>From: Nemeth Miklos <nemeth(a)iqsoft.hu> > > Is there any doc on "this()" or "id()"? >I think you explored this teritory. YOU should create a how-to on the >topic. Okie-dokie. But then I have to join zope as a member, huh? :) If you provide me with enough info on how to submit a how-to, I will make one. By the way, is it possible to set up some search features on the how-to's? With over 100 how-to's, it is a little bit painful to go through them. > > Sometimes learning a new software is > > not so much what you know to do, but what you know NOT TO DO. > > >That is why programmers do not like to learn new languages and tools. >That is why UNIX is forever. I guess there was a misunderstanding here. I am a programmer and I like to learn new language and tools. I am just making the comment that, as a programmer, it's often more important to know the limitations of a language/tool, than to know its capabilities. For instance, in Python you can't write the incremental operator i++. You write it, you run into a bug, and you waste your time. It's like when I was learning portuguese... I already knew spanish. The two languages are too similar, so instead of learning what words I can use in portuguese, I was learning what words I SHOULDN'T use, why I shouldn't use them, and what alternatives there were. :) > > Also, is there any documentation on calling DTML methods with arguments? >I > > know you can do it with "myMethod(_.None, _, arg1=val1, arg2=val2, >...)", > > but I'd like to know what the role of _.None is. (I know _ is the > > namespace...), that is, if I replace it with something like > > "myMethod(coolDude, _, ...)" what sort of catastrophe might happen. :) > > >This is completely new to me! Where did you learned it! >I thought I read or at least browsed all how-tos and Zope docs. Ha! After reading Zope E-group for a few months, I ran into a few messages giving out all kinds of undocumented features. For instance, the &dmtl-myVar; directive, which is equivalent to <dtml-var myVar>. I remember someone said that the _.None argument represents the "target object" for DMTL methods. Now, what is a target object, I don't know. :) regards, Hung Jung ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com

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RE: [Zope] Need help with evaluation issues of Zope
by Michel Pelletier 06 Jan '00

06 Jan '00

> -----Original Message----- > From: Peter.Rupp(a)ual.com [mailto:Peter.Rupp@ual.com] > Sent: Wednesday, January 05, 2000 12:08 PM > To: zope(a)zope.org > Subject: [Zope] Need help with evaluation issues of Zope > > > > 1) Potential bug? I compiled Zope on an intel machine > running Solaris > 2.7 (using gcc 2.8.1) and Python 1.5.2 (latest). I started > Zope (using > Zope's bundled web server) and followed the tutorial in building a > fictious web site. After adding various users/passwords to the > user-acl folder (which existed under the web site's high > level folder), > I restarted another netscape browser to see if I could login > to manage > the site as one of the aformentioned users....Zope would not let me > login as the new added users, but I could login as superuser. Next, > thinking that that perhaps Zope was one of those products that had to > be restarted to see the new userid's, I attempted to restart > zope from > the management "control-panel" page. It appears that Zope does > restart, but.....you cannot access the Zope web site anymore....Zope > puts up a page saying something to the effect "it tried to perform IO > on a closed file", then a long list of trace messages. Also, in the > xterm window where I started Zope, a message pops up (STDERR) saying > that it cannot write to some file, then prints what appear to > be octal > zeros \000\000\000. > > Unfortunately, I don't have the specifics with me (I can send that > along if you want). Any ideas here? The remote management > ability of > Zope is stated as a feature, but it concerns me that this simple > operation fails miserably. I suspect this is not a Zope bug because no one else is reporting it, and I cannot reproduct it on Linux or SPARC solaris. It is probably something to do with your setup. You're not storing the Data.fs file on an NFS partition are you? That would be BAAAAAAAAD. > > 2) I think the tutorial is excellent, but it doesn't go into > the exact > meaning(s) of "a Zope user" and what the ACL list is for. This is > something I really need help understanding. To me, "user" > could mean > the following things: > a) A "site administrator" user...that is I have the ability to go > through a backdoor at the web-site and perform administrative > operations....whereby I would login at some point? Yes, this is a Zope user. It typically has the "Manager" role but you can create new roles for different 'kinds' of manager that you want. > b) A "web surfer" (who really isn't authenticated as a > "user") who > visits the site looking for some information that's made > public via the > web site. I'm guessing here, but that at some point, administrative > users come in this way, then when traveling to a different folder > within the site, are eventually asked to login? This is also a Zope user called "Anonymous User" it has the "Anonymous" Role. > c) A "paid subscription" user, who after logging in, has > access to > his separate area and can see specific web pages on the site? This is like any other user, it just has a special role you create. It could be the "Paid Subscriber" role, if you want. > These concepts are not very clear from the doc, and would appreciate > any help understanding Zope's meaning of the word "user". Zope has Users, Roles and Permissions. Users have Roles, and various Roles have Permissions mapped to them. At any time a User is allowed to do anything that the union of the permissions of their roles allows them to do. Using your example, you can create a "Subscriber" role that has more permissions than "Anonymous" does. When someone gives you money, you give them the Subscriber role and voila, they are allowed to do things that only Subscribers can do, because they have the role. BTW, in DTML you can access the current user object with <dtml-var AUTHENTICATED_USER>. > 3) I'm running Oracle 7.3.2 on the same server that Zope's > intalled...but I couldn't seem to find information on how to > connect to > an Oracle database. My goal was to run a simple query > against a system > table, and display the results. The ZSQL guide guides you through a > "Gadfly" database connection, but I couldn't find anything that would > connect me to Oracle. Is there something basic that I have > missed here? No, you need to use DCOracle and the Oracle Database Adapter. Many of our customers use Oracle and Zope quite extensivly. Gadfly is a free, simple, lightweight relational database written in Python. > 4) Does Zope have the capability of aiding the cgi-script programming > effort for populating a database? I would like to put up a > form, have > the user input some items, and have these items *inserted* into an > Oracle database. Is this feasable, or do I have to write my own > cgi-interface? Speaking of cgi, is the only way to run a cgi-script > from within Zope by creating an external Python method that > ultimately > calls the "system" module? No, you don't need to write your own CGI interface, in fact Zope removes all need to ever think about CGI again. I haven't messed with it for years. Read Jeffrey's HowTo on using relational databases. http://www.zope.org/Members/jshell/ZSQLMethods-InsertingData Further, there is gobs of documentation on this. Go to http://www.zope.org/ and type 'ZSQL' into the "Search" box. -Michel

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Re. Zope for a article publication site
by Jerry.Spicklemire＠IFLYATA.COM 06 Jan '00

06 Jan '00

PosgreSQL has a native "text" data type that can grow to a large size transparently. Accessing records of this type should be very effective as a means of publishing raw text, formatted via DTML. It should be fairly easy to store huge volumes of text in PostgrSQL while the size of the Zope ODBMS remains much smaller, since it only needs to store the presentation pieces. I don't know enough about ZCatalog yet to say whether you could successfully integrate the two, but perhaps some of the other interesting native features of PostgreSQL could stand in, since indexing is what DMSs do best.

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Which is faster: ZServer-1-thread, or Apache/PCGI
by Eric W. Sink 06 Jan '00

06 Jan '00

Which setup would yield higher performance under heavy traffic loads? 1. Running ZServer as the primary web server, but constrained to just a single thread. -or- 2. Running Zope behind Apache using PCGI. Inquiring minds want to know. -- Eric W. Sink, Software Craftsman SourceGear Corporation eric(a)sourcegear.com

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