March 2001 - Zope - Zope lists

Automate an e-mail script
by Eric Vautour 26 Mar '01

26 Mar '01

Hello there, I have written a script that will generate a list of all the files that are more than a year old in zope, and e-mails this list to someone who cares. I was wondering if there was a way that I could automate this script so that it ran every morning without having someone run it manually. Thanks Eric

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Re: [Zope] Tree and batching.
by Dieter Maurer 26 Mar '01

26 Mar '01

ghaley(a)mail.venaca.com writes: > .... is not supported. Dieter

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Re: [Zope] GET variables..
by Dieter Maurer 26 Mar '01

26 Mar '01

After Dark writes: > Hi, how can I use a variable that I passed through a form > with a GET method? > > Example: > ----------- > <form name="busca" action="pesquisa.htm" method=get > target="mainFrame"> > <input name=PrincipiaSearchSource size=12 value=""> > <input type=hidden name=raw =""> > </form> > ----------- > > pesquisa.htm > > <dtml-if PrincipiaSearchSource> > <p><dtml-var PrincipiaSearchSource></p> > </dtml-if> > ------------ > > How can I make this work? And if I pass the argument by You change the name or use "REQUEST.form['PrincipiaSearchSource']. Incidentally, many Zope objects define this name and this definition is found before the one in REQUEST. More on that: URL:http://www.dieter.handshake.de/pyprojects/zope/book/chap3.html Dieter

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Re: [Zope] manage_addFile question
by Dieter Maurer 26 Mar '01

26 Mar '01

Dimitris Andrakakis writes: > I'm trying to set up a form to let my users upload > files in a certain folder. The form is like this: > > <form action="fileadd" method="get" enctype="multipart/form-data"> > <input type="file" name="file"> > <input type="submit" name="Submit file"> > </form> Please use "method=post"! Dieter

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Tree and batching.
by ghaley＠mail.venaca.com 26 Mar '01

26 Mar '01

Hi, I am getting ready to try to tackle this. I want to set up a tree structure that will batch the contents of each branch. i did searches on zope.org, google.com and got individual pointers to either tree or batch but not for both. since it seems a particularly valuable feature (when a branch can contain hundreds of items), i thought it might have been tackled by someone already. so, if anyone knows where the appropriate documentation, how-to, helpful note might be, please let me know. if this has not been done yet, is it something that will require revising the source code? is it impossible, e.g., due to an inherent incompatibility for tree and batch to coexist? Thanks. ciao! greg. Gregory Haley DBA/Web Programmer Venaca, LLC.

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Manual SQL (ZPoPyDA) transaction rollback
by Mayers, Philip J 26 Mar '01

26 Mar '01

I have a fairly complex app that involves users adding rows to many tables - I'd like to be able to manually rollback the current Zope/ZPoPyDA transaction without raising an exception - is there a way? Regards, Phil +----------------------------------+ | Phil Mayers, Network Support | | Centre for Computing Services | | Imperial College | +----------------------------------+

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Z2.pid permissions
by Carl David 26 Mar '01

26 Mar '01

I've been trying to read the archives, but getting nowhere. Zope was installed by a non-root user, and now we wish to start it in rc.d/init.d so that it runs as nobody. We don't mind the 8080 port at all. But when root starts Zope, Z2.pid permissions seem to intrude, and I've tried every permutation and combination possible (I think) hacking (a random walk really) searching for a combination which will work. Can some one definitively explain how to set _ALL_ the permissions, etc., so that Zope can start properly on boot? Thanks Carl David david(a)uconnvm.uconn.edu

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Zcatalog: indexing on list attributes?
by Eric Casteleijn 26 Mar '01

26 Mar '01

I've searched the archives and zope.org, but I can't find the answer tho this problem (i think this is partly because it's hard to express it in a few search-terms.) : I have a ZClass (subclassed from ZCatalogAware) with some properties. The properties are indexed in a catalog and the indexing works fine for most of them. One of the properties however is a multiple selction listbox, and this means that the property-type is a list. The ZCatalog doesn't seem to like this. It will not report any errors, but any searches in which the property is involved deliver a result set that is way too small. (I suspect that only those records are returned for which the multiple selection is empty.) Now as it turns out, the multiple selection itself was unnecessary as 99% of the records will have only a single value in the field. My question therefore is twofold: Is this behaviour expected and am i too green to get how to index the list property (i suspect this is it,) or is it a bug? In the unlikely latter case, is there a way to change the type of the property without losing the data? (I'm not using an external datasource yet, as this is just a prototype site, but the dataset is large enough that i don't want to enter it again.) TIA, eric casteleijn

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RE: [Zope] kerberos ? + LDAP + ecommerce + ZEO replication etc
by Mayers, Philip J 26 Mar '01

26 Mar '01

Yes, I'm well aware of the uses of kerberos other than "Check my passwords against it" - my point was I don't know how many python modules are geared up to deal with kerberos (*and* since environment variables are per-process and ZServer is threaded I see some problems with it 'just working'). The LDAP situation was the "thought" I had, closely followed by IMAP and Exchange 2000 for the Worldpilot end of things. I'm not sure what relevance PKINIT has to Zope directly (although it is supremely good for initial authentication, ZServer never sees a users private key) - am I missing something? Surely a traditional TGT would do just as well? The point about the AD groups is a good one - mapping those into Zope roles would seem like a very cool LoginManager plugin, *but* I'm not about to do that with trade-secret information (regardless of the publishing method) and have MS lawyers crawling out of the woodwork... :o) - It's certainly a good idea though. I have deep heebie-jeebies about storing the ticket as a cookie - I realise if it's a secure cookie, then it should be safe, but... A better bet would be the Kerberos cipher suites for TLS (with delegation enabled) RFC2712: ftp://ftp.isi.edu/in-notes/rfc2712.txt or IPSEC with the same (work in progress, no link available), or some kind of SASL or SNEGO HTTP auth mechanism, but that has high reauthentication costs for opening new connections. So yes, there are lots of things you *can* do with the ticket - just I'm not sure about whether you can do them *now*. (Kerberos is coming in Samba, as soon as I get some free time) Cheers, Phil -----Original Message----- From: Albert Langer To: 'Mayers, Philip J'; zope(a)zope.org Sent: 25/03/01 06:12 Subject: RE: [Zope] kerberos ? + LDAP + ecommerce + ZEO replication etc The kerberos ticket certainly *can* be put to "sensible use". An open source unix interoperability kit for using the Active Directory (AD) version of Kerberos is freely available from: http://msdn.microsoft.com/library/techart/kerberossamp.htm It is based on the same underlying software as the PAM modules. The AD "Public Key Cryptography for Initial Authentication in Kerberos." is based on IETF PKINIT draft 09: http://support.microsoft.com/support/kb/articles/Q248/7/53.ASP Other details on MS kerberos can be obtained by search for "kerberos" keyword on MSDN. Except for certain proprietary extensions, the technical specs for which have since been published elsewhere: http://www.gnosis.cx/download/kerbspec.pdf These extensions include a list of the resource and account groups that the principal is a member of, which enable very rapid and scalable use of finely grained AD permissions via only the kerberos "ticket" once the slow initial PKINT logon to obtain that ticket has been done. This is a vast improvement on simple LDAP authentication, which Microsoft attempted, but failed, to keep a "trade secret", presumably to shore up their monopoly against competition from Samba NT domain controllers etc. BTW I've done some detailed study of the AD permissions structure and it's relation to other things if anybody needs help with that side of it. Adding those specs to the freely available unix kit should allow any client on any platform to work with any services dependent on AD and thus avoid being locked out. In particular Zope (on any platform) could provide a web (including XML-RPC/SOAP etc) front end for both access and management by obtaining the client (from any platform) plaintext logon password over a secure transport, never storing it persistently unencrypted, but returning an encrypted kerberos ticket as a cookie for future access. I described a plausible approach for a similar problem with credit card numbers at: http://lists.codeit.com/pipermail/zcommerce/2000-June/000247.html The ticket will automatically expire (and can automatically be renewed) giving all the usual kerberos safeguards, provided the transport is secure and there is no unencrypted persistent storage within Zope. The list of groups can then work well with the Zope acquisition based access control system. Separately, freely available Kereberos and OpenLDAP implementations can be extended to eliminate any need for Win2K AD itself by adding the single valued binary attribute "ntSecurityDescriptor" in the same format as AD. The Samba project ought to be very interested in that: http://marc.theaimsgroup.com/?l=samba-ntdom&w=2&r=1&s=active+directory&q =b So should DC for Zope together with ActiveState that already has expertize in ADSI/COM. (Likewise has major implications for distributed COM+ version of Mozilla XPCOM). http://www.activestate.com/Products/Komodo/PyXPCOM/index.html Zope's ZODB/ZEO also provides an excellent OODBMS "aggressively optimized" for a high ratio of reads to writes that is very suitable for the "active" side of an Active Directory (using BerekelyDB storage similar to that used in OpenLDAP). ZEO is also looking at multi-master replication issues (though the approach looks a bit naive to me). TransWarp is very relevant to the stuff below. http://www.zope.org//Members/pje/Wikis/TransWarp/HomePage PostgreSQL provides an excellent ORDBMS more suitable for the "search" side of a directory than ZODB. It will very soon include python as a backend stored procedure language and has a sophisticated "rules" system. OpenLDAP already provides an excellent front end, including SASL authentication: http://www.openldap.org/software/roadmap.html ACS 4 provides an Oracle based web application server framework with LDAP integration. The kernel has a finely grained permissions system, with a role/party/group framework compatible with the "Accountability" pattern and an object model compatible with the "Domain Object Model" pattern. This is very appropriate for a sophisticated LDAP directory backend (as well as being necessary for the industrial strength RDBMS essential for serious Zope ecommerce). http://developer.arsdigita.com/doc/kernel-doc.html http://www.martinfowler.com/ap2/index.html http://www.martinfowler.com/apsupp/accountability.pdf http://st-www.cs.uiuc.edu/users/johnson/DOM.html ACS4 also provides an excellent workflow engine: http://developer.arsdigita.com/doc/acs-workflow/ This can add the missing "strategy" side of the Domain Object Model together with Transwarp. Zope can provide much better UI and management stuff to work with the engine. It can also be a basis for reliable distributed workflow/transactions/replication: http://www.distribution.cs.ncl.ac.uk/projects/WorkflowSystem/index.html This is a better approach for some types of database replication than that currently proposed for ZEO or the usual approaches described in Chapter 8 of: http://research.microsoft.com/pubs/ccontrol/ ACS4 is being ported to PostgreSQL by OpenACS which has previously ported ACS3: http://openacs.org/4/ http://openacs.org/bboard/q-and-a.tcl?topic_id=12&topic=OpenACS%204%2e0% 20De sign Initial version of kernel already out. Adapting the unix interoperability kit for AD to also use the kerberos extensions for AD groups and permissions and provide a cross platform solution like (and with) OpenSSL is a small project. OpenSSL should have any needed expertize: http://www.openssl.org Public Key Certificate Authority software is also available, including for python: http://www.pyca.de/ A number of better approaches to trust management are well known: http://www.anu.edu.au/people/Roger.Clarke/II/PKIMisFit.html Unfortunately that minor adaptation of kerberos clients is peripheral to the main focus of most of the projects mentioned, but could well be a key link for bringing them together to both knock Microsoft off it's perch and provide more decentralized trust and directory services necessary for the rapid explosion of peer to peer networked web services. I sure hope somebody is working on it. If anybody has any relevant links or email addresses please email them directly as well as posting here (I only scan occasional messages from the Zope list). BTW, while I'm at it with all the links above, I'd like to draw attention to some earlier postings re the need for Zope and ACS to combined for viable ecommerce: http://lists.codeit.com/pipermail/zcommerce/2000-June/000265.html http://lists.codeit.com/pipermail/zcommerce/2000-June/000259.html http://lists.codeit.com/pipermail/zcommerce/2000-June/000257.html Right now arsDigita is going through a major upheaval and it looks like OpenACS will provide an umbrella home for various ports of ACS 4, including python/Zope as well as their main orientation to Tcl. The data model of ACS4 is now much better separated from the Tcl side and they are doing a Query Dispatcher for supporting multiple RDBMS ports (with some tools in python for extracting SQL from the Tcl code completely ;-). http://developer.arsdigita.com/commerce-project-central/ http://www.arsdigita.com/bboard/q-and-a-fetch-msg?msg%5fid=000b5M&topic% 5fid =web%2fdb&topic= http://www.arsdigita.com/bboard/q-and-a-fetch-msg?msg%5fid=000ZGz&topic% 5fid =web%2fdb&topic= A Zopista involved in OpenACS has mentioned working on port of data models of ecommerce module. That could result in a Zope port if there is active support from DC. http://openacs.org/bboard/q-and-a-fetch-msg.tcl?msg_id=0001AP&topic_id=1 2&to pic=OpenACS%204%2e0%20Design At the same time there seems to be some problems with an AOLserver fork that could result in greater interest in using Zserver (don't know much about that - just speculating). If June 2000 was "premature", perhaps this is a better time to hope for some serious DC interest both in enabling an industrial strength ecommerce and workflow system for Zope and in integrating Zope with enterprise systems dependent on AD (if not in eventually replacing AD ;-) -----Original Message----- From: zope-admin(a)zope.org [mailto:zope-admin@zope.org]On Behalf Of Mayers, Philip J Sent: Sunday, March 25, 2001 9:12 AM To: 'zope(a)zope.org' Subject: RE: [Zope] kerberos ? Yes - There's a pam module for Python, and with PythonScripts, External methods and a LoginManager setup, I got it working. Quite slow, which is fine if you only authenticate once, but not if you do it on every HTTP request. (Note: I never bothered to check if LoginManager does once-only or per-request HTTP auth - I only did it as a five minute test, and a quick check on the machine shows that the logs have rotated out :o() The PAM module for Python can be found at www.python.org, go to Search, in the Vaults of Parnassus link type PAM. I'm not sure the ticket you got could be put to any sensible use though... Maybe... Hmm, just had a thought... Cheers, Phil -----Original Message----- From: Darcy Clark To: zope(a)zope.org Sent: 24/03/01 22:29 Subject: [Zope] kerberos ? has anyone tried to get Zope working with kerberos authentication ? Darcy _______________________________________________ Zope maillist - Zope(a)zope.org http://lists.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope-dev ) _______________________________________________ Zope maillist - Zope(a)zope.org http://lists.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope-dev )

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LoginManager
by Srinath Mantripragada 26 Mar '01

26 Mar '01

Hi, I want to know howto use multiple usersSource in Login Manager, if it's possible. I have added 2 usersSoucers and created diferent methods for each usersSource, but it authenticates only within the first userSource Listed. -- Srinath Mantripragada srinath.man(a)cpm.com.br

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