December 2004 - Zope

Help
by Loomis, Todd, CTR, DMSO 21 Dec '04

21 Dec '04

All: I've recently up to RH9 using python 2.1.1 with zope 2.4.3. However I get follow error when I start zope: Traceback (most recent call last): File "/var/www/z/z2.py", line 540, in ? import ZServer File "/var/www/z/ZServer/__init__.py", line 87, in ? from medusa.test import max_sockets File "/var/www/z/ZServer/medusa/test/max_sockets.py", line 2, in ? import socket File "/usr/local/lib/python2.1/socket.py", line 41, in ? from _socket import * ImportError: No module named _socket Can anyone help?

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KeyError:-1074637436
by Trung Tran 21 Dec '04

21 Dec '04

Hi, We have been deploying MailManager 1.0 which is a Zope product for few months. It initially works very well. For some reason MailManager suddenly keeps returning KeyError with value such as -1074637436 (it can be any number). It seems that it is ZCTextIndex error because the error log always includes the following traceback ..... Module Products.ZCatalog.CatalogPathAwareness, line 110, in reindex_object Module Products.ZCatalog.CatalogPathAwareness, line 106, in unindex_object Module Products.ZCatalog.ZCatalog, line 558, in uncatalog_object Module Products.ZCatalog.Catalog, line 411, in uncatalogObject Module Products.ZCTextIndex.ZCTextIndex, line 181, in unindex_object Module Products.ZCTextIndex.OkapiIndex, line 68, in unindex_doc Module Products.ZCTextIndex.BaseIndex, line 176, in unindex_doc Module Products.ZCTextIndex.BaseIndex, line 304, in _del_wordinfo I do pack the database, update the catalog, restart Zope but they only can help for a short time then we encounter KeyError again. This error usually occurs when users try to modify the ticket which is Zope object. The database is about 200MB and the catalog holds > 2000 objects. Has anyone experience similar issue? I do really appreciate any help. Trung Tran Email: trung.tran(a)hwe.com.au

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dtml-in strange behavour?
by mettwoch＠pt.lu 20 Dec '04

20 Dec '04

Hi, Could someone explain why iterating over a list of lists, like this: <dtml-in expr="[[1,1],[2,2]]"> <dtml-var sequence-item><br> </dtml-in> gives as result: [1,1] [2,2] but iterating over a list of tuples like this: <dtml-in expr="[(1,3),(2,4)]"> <dtml-var sequence-item><br> </dtml-in> gives as result 3 4 A list of tuples is created for instance when applying the items() method on a dictionary resulting from a SQL method call. When doing the above iterations in Python console, it gives the expected result eg. two lists and two tuples. Thx for any help -- Marc - a bloody Zope beginner -- mettwoch(a)pt.lu

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upload post request file object
by Bernd Dorn 20 Dec '04

20 Dec '04

hello all i'm currently implementing a virtual filesystem client using zope and gnome.vfs i have the following question regarding file uploads how do i get a file like object (for iteration) from a "POST" upload request in order to proxy the data to the actual target storage i don't want to load the whole data into memory, so i have to do this in junks tia, bernd ps: i alread took a look at OFS.Image, but this uses some kind of persistence stuff, hm

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Catatonic Zope Server
by Malcolm Cleaton 20 Dec '04

20 Dec '04

I'm having some trouble with a Zope server becoming unresponsive. The server runs quite a busy site, and sometimes has memory problems. We have been restarting zeo, and then zope, every few hours (with some five minutes difference inbetween). Recently, the disk containing Data.fs became full, and we had some strange conflict errors, where the error message appeared to suggest that our transaction had caused a conflict because it had started many hours ago, which of course it hadn't. We truncated the Data.fs some and the problems went away. A few days later, we had a new problem. Right after flipping cache files, Zope began to log a flood of errors such as: (our cache file).zec invalidate: oid mismatch: expected 0x0edcd6 read '(data)' The data looked like object pickles, including strings from our application. We deleted all the cache files, and deleted the Data.fs.index, and restarted. We haven't seen any obvious data errors since. That may be related to the current issue, or it may be a red herring. But now, the server has gone into a catatonic state just after a restart, at least twice. In this state, nothing appears in the Z2 or event logs, and requests for pages appear to mostly time out (although apache, for whatever reason, served up empty responses with a 200 ok code for some Zope requests during this time). The server sits in this dead state until it is restarted. The last time it happened, it would not restart correctly until zeo had also been restarted. I'm baffled. Can anybody shed any light on what may be happening? Thanks, Malcolm -- [] j a m k i t web solutions for charities malcolm cleaton T: 020 7549 0520 F: 020 7490 1152 M: 07986 563852 W: www.jamkit.com

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URL quote in python script
by Eddy Ilg 20 Dec '04

20 Dec '04

Hi, if I create a simple python script in zope (not external), how can I escape a string to pass in a URL? Thanks Eddy

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Database call before Product installation
by Cliff Ford 20 Dec '04

20 Dec '04

Following the discussion of ZClasses vs Products earlie this year I decided to convert some of my ZClass utilities to real Products, and I have run into an early problem. Im developing with Zope 2.7.3 and MySQL 3.23 but don't think the versions are particularly relevant. The database connection works fine - I used the Connection Test tab to create the table I need and make an initial entry. I want to get some information from the database during the instanciation sequence. I have Googled for hours, looked at other Products and looked at the source code for ZSQLMethods and DB and lots of other things, and I am stuck. This is where I have got to: I have a dtml form that lists available connections for the user to select from. That passes a connection id to a second form. In the second form I have a bit of dtml: <dtml-in expr="getFilters(connection_id)"> <dtml-var Filter> [just a list at this stage] <dtml-in> In the product I have tried this: def getFilters(self, connection_id): return SQL('getFilterSQL', 'Get Filter List', connection_id, '', _getFiltersSQL) where _getFiltersSQL=""" select Filter from Table group by Filter order by Filter """ [just the table name at this stage - no parameters] (which I think creates an SQL object) It gives me this (partial) traceback on submission of Form 2: * Module App.special_dtml, line 175, in _exec * Module DocumentTemplate.DT_In, line 685, in renderwob * Module Shared.DC.ZRDB.DA, line 492, in __getitem__ * Module Shared.DC.ZRDB.Aqueduct, line 313, in __getitem__ KeyError: 0 (Also, an error occurred while attempting to render the standard error message.) and I have tried this: def getFilters(self, connection_id): return SQL('getFilterSQL', 'Get Filter List', connection_id, '', _getFiltersSQL)() (which I think calls the SQL object) It gives me this output: The database connection MySQL_database_connection cannot be found. (Also, an error occurred while attempting to render the standard error message.) and I have tried this: def getFilters(self, connection_id): connection = getattr(self, connection_id) return connection().query(_getFiltersSQL) (which I think calls a method of the Connection object) I know that this returns ([{'width': 6, 'null': 1, 'type': 't', 'name': 'Filter'}], (('Public',),)) but the dtml-in loop does not produce anything. [Public is one of the Filters, nothing to do with Zope] I would be grateful if anybody can tell me the best way to read from (and write to) the database before the Product is installed, or point me to good documentation or an example Product. Cliff

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RE: [Zope] debugging and browsers
by Maunder, Oliver 20 Dec '04

20 Dec '04

> I need to open two instances of a browser, one as one window > as a user in > the system with one login and set of session variables, and > the other as > another user (usually a manager) to manipulate the system > through the ZMI. > Likewise, sometime is is useful to open two instances of the system so > that you can look in one place with one window, and in > another place in > the other. Set up different user accounts on the machine, then run two instances of the browser using different accounts. Under Windows 2000/XP, hold down shift, right-click on the shortcut and choose "Run as". Under Linux, use "su". Should do exactly what you want. Olly The original of this email was scanned for viruses by the Government Secure Intranet (GSi) virus scanning service supplied exclusively by Energis in partnership with MessageLabs. On leaving the GSi this email was certified virus-free

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debugging and browsers
by Dennis Allison 20 Dec '04

20 Dec '04

I need to open two instances of a browser, one as one window as a user in the system with one login and set of session variables, and the other as another user (usually a manager) to manipulate the system through the ZMI. Likewise, sometime is is useful to open two instances of the system so that you can look in one place with one window, and in another place in the other. Most current browsers believe they are the only show in town run multiple instances as separate threads (or so it appear) happily sharing data. This causes problems when, as we do, naviagation information is saved in session variables. The precise behavior depends upon the browser. I guess I am looking for a way to enable the desired behavior by hacking Zope since it's unlikely that I can change the way browsers with an installed base behave. Anyone else encountered this issue or solved the problem.

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Re: [Zope] URL quote in python script
by David Siedband 20 Dec '04

20 Dec '04

by default, you can't use urllib.quote inside Zope, only in external methods. To use it inside Zope you'll need to explicitly allow it with allow_module() Check out the developers guide for info on how to use allow_module() http://zope.org/Documentation/Books/ZDG/current/Security.stx -- David Siedband generation-xml.com On Dec 20, 2004, at 12:47 AM, Eddy Ilg wrote: > David Siedband wrote: >> urllib.urlquote > There seems to be no such function in urllib. If I try it I get the > error "'module' object has no attribute 'urlquote'". I imported the > urllib properly. > I also tried to use urllib.quote, but this gives me "Access denied". > Seems like I may only access that from external scripts. > > How do I escape strings in an internal script? There must be a way... > > > Eddy

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