June 2001 - Zope-Dev

Name space in a Script (python)
by Jeff 07 Jun '01

07 Jun '01

Hi all, I'm trying to get variables from the name space in a python script without much luck... I think I am missing something very simple, but after hours of searching I'm at wits end. This is what I am trying: A DTML document has several properties defined on it. It calls a python script that needs to access these properties. No matter what I try, I can not get the properties from the calling DTML document in the python script... What am I missing? Thanks, Jeff

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Cookies and IE
by Austin Mayberry 06 Jun '01

06 Jun '01

I am having a problem with cookies in Internet Explorer. Zope will not allow cookies in IE to have -'s or ,'s. The problem extends from the fact that IE does not quote the environment variable HTTP_COOKIE, so Zope has separate regular expressions to deal with HTTP_COOKIE in Netscape and IE when parsing HTTP_COOKIE into the cookies dictionary. This is handled in the parse_cookie method of HTTPRequest.py. The first reg exp below is for Netscape and the second is the one it uses for IE. I understand why the one for IE does not allow for spaces, \0's, "'s, and ;'s because those are possible delimeters of the end of a cookie value, but I do not understand why it excludes -'s and ,'s. Does anyone know the reasoning behind this? qparmre=regex.compile( '\([\0- ]*' '\([^\0- ;,=\"]+\)="\([^"]*\)\"' '\([\0- ]*[;,]\)?[\0- ]*\)' ) parmre=regex.compile( '\([\0- ]*' '\([^\0- ;,=\"]+\)=\([^\0- ;,\"]*\)' '\([\0- ]*[;,]\)?[\0- ]*\)' )

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[Announce] API Documentation Fishbowl Project
by Amos Latteier 06 Jun '01

06 Jun '01

Fellow Zopistas, Mike Pelletier and I are working on a project to improve Zope's API documentation. Details are now publicly available in the fishbowl. (Actually it's been public for a while, but this is the first announcement of the project.) http://dev.zope.org/Wikis/DevSite/Projects/APIDocs I encourage you to check it out and leave your comments, criticisms, and suggestions. This project aims to improve the life of Zope developers, so please help us make sure we're not off base. For the project to succeed it must meet *your* needs. Thanks! -Amos -- Amos Latteier mailto:amos@digicool.com Digital Creations http://www.digicool.com

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Streaming and PCGI
by Andre Schubert 06 Jun '01

06 Jun '01

Hi there, I've found out, that Streaming only works with if i call the Function wich streams out my data over ZServer. If i call the Function over PCGI it doesn't work. Can anybody explain me why streaming over PCGI doesn't work, or has anybody a solution of streaming with PCGI ??? thanks as

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60GB Data.fs?
by Bjorn Stabell 06 Jun '01

06 Jun '01

Hi there, We're planning a Yahoo! Clubs like system that should scale to about 30, 000 users. Assuming about 3,000 groups and 20MB per group (group functionality includes photo albums), gives a database size of 60GB. Assuming on average 3,000 users per day, 20 page views per users, gives about 60,000 page views (not a lot, but if it's all dynamically generated?). We'd like to use Zope for this, if it is possible. Other options are ok too; anyone have any experience with other ready-made systems? At this scale, how would ZODB hold up with respect to memory use and speed? I've heard rumors that it loads an index into memory on start-up. How would using Oracle as a Storage (ZODB semantics) help? Going full-scale RDBMS means we'd have to reimplement a lot of existing useful tools, so we'd rather not do that if using Zope. I know we'll have to play with cacheing as well, and as I see there are these options: - SQL method cacheing - Using StandardCacheManagers to cache Python and DTML methods - Using StandardCacheManagers to cache pages (using, e.g., Squid as an HTTP accelerator) - ZEO client object cacheing Any other ideas? Bye, -- Bjorn Stabell <bjorn(a)exoweb.net>

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Cache invalidation with DTML
by E. Seifert 06 Jun '01

06 Jun '01

Hi list, is there a way to invalidate certain objects in cache using DTML? Thanks in advance Eric

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context bindings in python products
by Bernd Dorn 06 Jun '01

06 Jun '01

hi isn't there some mixin class to provide bindings to python products like in python scripts? so that i have some objects like: context, container ... i searched through the zope site, but there is nothing which can do such stuff am i the only one who needs this, or is it a sign for wrong coding practice in zope? the only thing i found was this: http://www.zope.org/Members/htrd/howto/FunctionTemplate but it seems very complicated in argument passing wouldn't it be nice to have something like this if there is nothing out there, has anybody some sugestions how to implement it so i would write it by myself maybe with the REQUEST Class or so? thanks in advance, bernd

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DCOracle2 Beta 1 Announcement
by Matthew T. Kromer 06 Jun '01

06 Jun '01

Description DCOracle2 is a replacement for DCOracle, written primarily in C. DCOracle 1 uses OCI 7 bindings for most Oracle calls, with OCI 8 mixed in for LOB support. Oracle 8i disallows mixing of calls within a statement, and so breaks LOB support. DCO2 uses entirely OCI 8 calls, and thus can use LOBs. New in this Release Beta 1 Stored procedure input works properly, cycles in stored procedures removed. Stored procedures now have meaningful docstrings (describing their parameters). Type coercion change from a tuple kludge to a TypeCoercion object. Set ability (and default) to do static binding for BindingArrays, working around dynamic fetch occasional NULL bug on Linux. Batch executemany(). Add backward compatable dbiRaw and execute modes. Alpha 6 Nested Cursors, e.g. SELECT ENAME, CURSOR(SELECT ENAME FROM EMP WHERE MGR=7908) FROM EMP WHERE EMPNO=7908). API 2.0 type objects. Add trim() to LobLocators. Wrap LOB permissions for Zope in ZOracleDA. Change result on execute w/o results to None, not []. Return statement type code after execute(). Alpha 5 Stored procedure fixes, and debugging enhancements. Alpha 4 Stored procedure IN/OUT variables, changes to executemany() Alpha 3 Changed ZOracleDA to not use method call to connect(). Partial stored procedure work Alpha 2 Bug fixes, largely packaging, from Alpha 1. Added SQLT_AFC handler, SPARC alignment fixes. Alpha 1 First www.zope.org release Contents This release contains both DCOracle2 and a slightly modified ZOracleDA; it will register as ZOracleDA would (to silently upgrade Oracle connections) and thus cannot be run concurrently with ZOracleDA/DCOracle. Installation To replace ZOracleDA, untar into lib/python/Products and make, move ZOracleDA out of lib/python/Products, and rename lib/python/Products/DCO2 to lib/python/Products/ZOracleDA. Usage This release is intended for testing with ZOracleDA feature compatibility (including LOB support) and is also intended for general use. Platforms NT support has been tested, Microsoft Visual Studio project files are included; this has only received testing with Oracle 8.0 and Oracle 8.1 on Linux, Solaris, and Windows NT; a wider variety of platform experience is welcomed. Download The product is available at http://www.zope.org/Members/matt/dco2.

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SV: [Zope-dev] 60GB Data.fs?
by Magnus Heino (Rivermen) 06 Jun '01

06 Jun '01

> Also how are the disks layed out? Is it possible to have, say, 5 disks > each on their own (no RAID) and then split the data.fs over them using > PartitionedFileStorage or similar. Where can I get PartitionedFileStorage? /Magnus

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Re: [Zope-dev] Zope Server hanging :-(
by Dieter Maurer 06 Jun '01

06 Jun '01

Erik Enge writes: > When, in my Zope Python Product, I call a method that does not exist, Zope > dies, restarts and then is fine again. If something (another method or a > browser perhaps) is calling this method again and again, Zope does a die, > restart, rinse, repeat. > > I think the problem is that it doesn't throw the necessary Exception, or > that it actually throws it, but it is somehow captured by a try-except > that I've put out somewhere, so it doesn't show. Very strange! Even if the exception was captured, this should not cause Zope to die. Did you look in the log files? Have their been any core dumps? Dieter

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