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Best practice for Zope-private copy of Python 2.1 on Linux?
by Jeff Kowalczyk 07 May '02

07 May '02

With the RH7.3 release today, the default Python2 installation is that much more likely to be Python 2.2 (it's the base package in RH7.3), instead of Python 2.1. Rather than ask the FAQ of why and what parts of Zope can't handle Python 2.2, I'll ask if there is, or suggest if there isn't, a shift due in the installation procedures on Linux to optionally use a private copy of Python 2.1, much like the Windows version of Zope does. That version allows me to use Python 2.2 without any interference. I'd prefer that the file layout matched WinZope as closely as possible. In this case, I'm willing to give up some disk space to have a sandbox that Zope can run in with its configuration uninterrupted. FWIW, I'd like to see an expanded tarball of Zope available that builds the whole thing, including its own Python and the most common c-extensions, in a unified makefile. Maybe that would get the possibility of RPM releases back on track, too. Can anyone suggest a best practice to get Zope 2.5.1 on Linux running with a private Python2.1, keeping the new Python releases separate from the one Zope will use?

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Re: Anyone know how to pre-expand a certain branch of a dtml-tree?
by Lars Heber 06 May '02

06 May '02

Hello, list, I was asked to post my solution of the upper problem to the list rather than just eMailing it to a single person. So, here it is: > Lars Heber wrote: > > >Regarding to your posting on Zope-Dev: > > > >http://zope.nipltd.com/public/lists/dev-archive.nsf/ByKey/55836FB132FFC257 > > > >Did you get an answer? > > > >Otherwise, here's a simple solution (that's the way I'm doing similar > >things, i. e. let the tree expand at predefined positions): > > > >Open your tree in a new browser window, so that you can see the complete > >URL of the tree - the tree state is encoded in the URL. > >Now, expand the tree to the desired state manually. Take the resulting > >URL from the address bar and make your tree document open with this URL. > > > >Eg, if you have a frame set, and this was s. th. like: > > > ><frameset ...> > > <frame name="navigation" src="myNavigation"> > > > >replace the "src"-part ("myNavigation") by this new, long URL. > > > >If you don't have a frame set, you could also HTTP-Redirect with a <meta > >content="refresh..."> tag. > > -- Lars Heber, mailto:Lars.Heber@t-systems.com T-Systems, debis Systemhaus GEI GmbH, Geschaeftsstelle Sachsen

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ZODBCDB/ZSQL does not accept where clause with Zope 5.1
by Robert Rottermann 06 May '02

06 May '02

Hi there, I can not use ZODBCDA with an SQL-statement from a ZSQL object that contains a where clause.When I do I get an error stating that 1 parameter was required but none was provided. I did install ZODBCDA (the newest version from the Zope-site) And I did install Zope 5.1 I am using NT2000 I did recompile sql.pyd but it did not help. Can anyone give me a hint what do? Thank you very much Robert

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DB.py: pool_size
by HoYin Au 04 May '02

04 May '02

We've been experiencing some extreme lag on our Zope site lately, and have noticed that the bottleneck seems to be the 7 thread limit placed on ZODB. I was wondering if there are any remifications on increasing the pool_size variable in lib/python/ZODB/DB.py ? -Hoyin Au

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Sync.Synchronized and ever increasing refcounts on 2.2.4
by Noel Duffy 03 May '02

03 May '02

Hi all, In my Zope site I have classes derived from the mixin Sync.Synchronized, because the objects derived from my classes must be thread-safe. Lately I've being experiencing serious memory leaks, with the result that after a couple of days Zopes memory usage reaches a couple of hundred megabytes in size, and Zope stops responding. In an attempt to track down the problem, I have been using the Zope debug section of the management interface, and I noticed that the refcount of Sync.Synchronized increases by about 200 everytime my site receives a get request. These reference counts never decrease. To help me understand the problem, I wrote a small test harness consisting of two files. The first, test1.py, looks like this: import Sync class foo(Sync.Synchronized): def __init__(self): print 'constuctor' def bar(self): print 'wibble' # Create a singleton object. There should only be one of these. foo_ob=foo() ## end of test1.py The second file, test.py, looks like this: import sys,Sync import test1 count=0 while 1: count=count+1 # call method bar on object foo_ob. test1.foo_ob.bar() print '%d - %d' % (count, sys.getrefcount(Sync.Synchronized)) ## end of test.py This code just imports test1, and makes lots of calls to the bar() method of the single foo_ob. The results of running test.py is constuctor wibble 1 - 11 wibble 2 - 12 wibble 3 - 13 wibble 4 - 14 wibble 5 - 15 wibble 6 - 16 wibble 7 - 17 wibble 8 - 18 wibble 9 - 19 wibble 10 - 20 wibble 11 - 21 wibble 12 - 22 wibble 13 - 23 wibble 14 - 24 wibble 15 - 25 wibble 16 - 26 wibble 17 - 27 wibble 18 - 28 wibble 19 - 29 wibble 20 - 30 wibble 21 - 31 wibble 22 - 32 wibble 23 - 33 wibble 24 - 34 wibble 25 - 35 wibble 26 - 36 wibble 27 - 37 wibble 28 - 38 wibble 29 - 39 Note how the refcount for Sync.Synchronized keeps increasing. I searched on Google about this, and found this message: http://cvs.zope.org/Zope/lib/python/ts_regex.py?sortby=log which implies that there was a problem with refcounts. So, finally, we come to the question, or rather questions, since there are two: 1. Why does the refcount of Sync.Synchronized keep increasing? 2. Am I chasing a red herring here? That is, does the "Top Refcounts" part of the Zope Debug screen merely show that there is one instance of an object, and N references, and consequently nothing to worry about?. If so, is there a way I can find out how many real instances there are? Any advice greatly appreciated. Thanks in advance, Noel.

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LDAPUserFolder
by Dirk Datzert 03 May '02

03 May '02

Hi Jens, one question about possibilities of LDAPUserFolder: We decide to install only one LDAPUserFolder in the Root-Folder and configure him to do the authentications against LDAP. In the subfolders we want to install 'LDAPUserFolders' which should not be configured again, but use the top-level LDAPUserFolder. In this 'LDAPUserFolders' there would be done the Groups Management on an base of LDAP-Group to Zope-Role mapping. Do you think it is possible to split this feature from LDAPUserFolder (with a little programming) ? Where should I look on programming and what need I take care about ? Regards, Dirk

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(no subject)
by laurent mpeti kabila 03 May '02

03 May '02

REQUEST FOR URGENT BUSINESS ASSISTANCE -------------------------------------- Your contact was availed to me by the chamber of commerce. It was given to me because of my diplomatic status as I did not disclose the actual reasons for which I sought your contact. But I was assured That you are reputable and trustworthy if you will be of assistance. I am Laurent Mpeti Kabila (Jnr) the second son of Late President LAURENT DESIRE KABILA the immediate Past president of the DEMOCRATIC REPUBLIC OF CONGO in Africa who was murdered by his opposition through his personal bodyguards in his bedroom on Tuesday 16th January, 2001. I have the privilege of being mandated by my father colleagues to seek your immediate and urgent co-operation to receive into your bank account the sum of US $25m. (twenty-five million Dollars) and some thousands carats of Diamond. This money and treasures was lodged in a vault with a security firm in Europe and South-Africa. SOURCES OF DIAMONDS AND FUND In August 2000, my father as a defence minister and president has a meeting with his cabinet and armychief about the defence budget for 2000 to 2001 which was US $700m. so he directed one of his best friend. Frederic Kibasa Maliba who was a minister of mines and a political party leader known as the Union Sacree de, I opposition radicale et ses allies (USORAL) to buy arms with US $200m on 5th January 2001; for him to finalized the arms deal, my father was murdered. f.K. Maliba (FKM) and I have decided to keep the money with a foreigner after which he will use it to contest for the political election. Inspite of all this we have resolved to present your or your company for the firm to pay it into your nominated account the above sum and diamonds. This transaction should be finalized within seven (7) working days and for your co-operation and partnership, we have unanimously agreed that you will be entitled to 5.5% of the money when successfully receive it in your account. The nature of your business is not relevant to the successful execution of this transaction what we require is your total co-operation and commitment to ensure 100% risk-free transaction at both ends and to protect the persons involved in this transactio! n, strict confidence and utmost secrecy is required even after the successful conclusion of this transaction. If this proposal is acceptable to you, kindly provide me with your personal telephone and fax through my E-mail box for immediate commencement of the transaction. I count on your honour to keep my secret, SECRET. Looking forward for your urgent reply Thanks. Best Regards MPETI L. KABILA (Jnr)

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range:max, date times and pluggableindexes
by Lennart Regebro 02 May '02

02 May '02

In Zope 2.3.3 we did this with ZCatalog, on a field index: query['effective_date'] = ['', DateTime.now()] query['effective_date_usage'] = 'range:max' This returns all records where the effective_date is lower than todays date OR the effective_date is an empty string. In Zope 2.5.1, the same code now returns *all* records. It seems like now suddenly comparing dates and an empty string always returns true. Question 1: Is there a way to solve this without having to do two separate queries? Question 2: Is it really true that comparing dates and en empty string returns true, no matter what? If that is the case (which it seems to be) then I think it's a bug, unless somebody as very good arguments. :-) Whaddayousay?

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Does 'undo' scan the entire ZODB?
by Ivo van der Wijk 02 May '02

02 May '02

Hi All, I just noticed that the undo tab on our zopeserver takes ages to load. If I try to trace the zope proces (as far as possible), it looks asif the entire Data.fs is scanned. Does zope scan the entire ZODB for old versions? It slows down our server enourmously with a 3G Data.fs. If so, aren't there more efficient ways to do this (backreferences to old versions for example) Ivo -- Drs. I.R. van der Wijk -=- Brouwersgracht 132 Amaze Internet Services V.O.F. 1013 HA Amsterdam, NL -=- T +31-20-4688336 F +31-20-4688337 Linux/Web/Zope/SQL/MMBase W http://www.amaze.nl E info(a)amaze.nl Network Solutions W http://vanderwijk.info E ivo(a)amaze.nl Consultancy PGP http://vanderwijk.info/pgp -=-

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copy/paste security
by Christopher N. Deckard 01 May '02

01 May '02

Hi, It is common knowledge that we can restrict access to an object by taking away many of the permissions from the security manager in the ZMI. Especially in the case of some objects like Oracle database connections, you don't want other people to be able to snag your "connect string" which contains username and password information. However, if a user has access to any folder on the system, they can programatically (and in some cases use the ZMI) copy the objects to anohter location. For example, if a user can view the management screens in a folder, they can copy an object, paste it to another location, give his self Manager local roles, and then view the "connect string". This works basically for every object. The problem is the CopySupport._canCopy method, which always returns 1 (true). It looks like this should be overridden for special products, but the base functionality should do some basic permission checking to determine if the object is copyable or should be copied. Below is a diff for OFS/CopySupport which adds a check to _canCopy to look for the "Access contents information" permission. -Chris -- -------------------------------------------------------------------- Christopher N. Deckard | Lead Web Systems Developer cnd(a)ecn.purdue.edu | Engineering Computer Network http://www.ecn.purdue.edu/ | Purdue University ---- zlib.decompress('x\234K\316Kq((-J)M\325KM)\005\000)"\005w') --- --- CopySupport.py.orig Wed May 1 14:59:46 2002 +++ CopySupport.py Wed May 1 15:02:34 2002 @@ -382,7 +382,9 @@ def _canCopy(self, op=0): """Called to make sure this object is copyable. The op var is 0 for a copy, 1 for a move.""" - return 1 + if self.REQUEST.AUTHENTICATED_USER.has_permission('Access contents information', self): + return 1 + return 0 def _notifyOfCopyTo(self, container, op=0): """Overide this to be pickly about where you go! If you dont

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