March 2000 - Zope-Dev

Adding a ZSQL Method programmatically
by jiva＠devware.com 30 Mar '00

30 Mar '00

How can I add a ZSQL method programatically, as in like in a constructor of a python class? -- Humor in the Court: Q. Were you aquainted with the deceased? A. Yes, sir. Q. Before or after he died?

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FSSession-0.3.0 has a problem under Windows
by Jephte CLAIN 30 Mar '00

30 Mar '00

Hello, Using FSSession-0.3.0 with Zope 2.1.6 on Windows NT, I have the message AttributeError, _v_data. It seems that _v_data is not kept between calls??? It worked with a previous version of FSSession (0.2.3) and a previous version of Zope (2.1.3) I'm not sure which one, Zope or FSSession, is the 'bad guy'. I have trashed FSSession 0.2.3, and I can no longer test the previous version. gaaros? btw, I am not on the list, please cc any reply please-help-ly yours jephte clain minf7(a)educ.univ-reunion.fr

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[Patch] Optimization for development mode
by Shane Hathaway 30 Mar '00

30 Mar '00

Ever since I started using Zope I thought its management interface was a little sluggish. Today I found out why, and the correction is very easy. If you are running Zope in development mode, especially in Unix, you will notice a healthy improvement in responsiveness. It turns out that because of a small bug, every time a DTML file is read from the file system (including management pages) it is re-parsed whether the file was modified or not. The reason is because the current logic checks not only the file modification date but also the file access date, which changes every time the file is read. Open lib/python/App/special_dtml.py in a text editor. Change one line (probably line 115) from: t=os.stat(self.raw) to: t=os.path.getmtime(self.raw) Restart Zope and enjoy a slightly faster development cycle! ;-) Shane

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Interfaces Wiki
by Michel Pelletier 30 Mar '00

30 Mar '00

Hi all, I modified the interfaces Wiki so that it is much cleaner, it is very easy, for example, to modify the wiki very quickly using Emacs and w3. The Interfaces Wiki is at http://www.zope.org/Members/michel/Projects/Interfaces The Interfaces project is discovering, defining, and documenting existing Zope interfaces. There is also a section for proposed interfaces. The Wiki is open to members of zope.org. If you wish to add comments, feel free to add them right into the wiki, but please be considerate of the project and the main authors by not deleting existing material and remaining within the style of the document. Also before making any changes, please review the TextFormattingRules of the Wiki and make sure you understand Structured Text. -Michel

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Customizing zope w/proxy
by Robert W. Bill 30 Mar '00

30 Mar '00

Hello all, I was looking for hints concerning customizing zope. I want to use zope as a proxy server (ie squid) only I need the access control structure and other features in zope. With apache this is done by the module system- a very well defined framework for the customization of apache. However, after looking through Zope I am having tremendous difficulty figuring out how to do this. I'm working on it within apache as well, but wanted a comparison with a zope implimentation. A few hints to get me started would be great! Can 'not found' errors be forwarded to another class for handling easily? Is there an established model for customizing behavior (not just content) in Zope as there is for apache? Thank you in advance for any help anyone may be able to provide. Robert

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Re: [Zope-dev] Re: [Zope] Zope in Jpython
by rossini＠biostat.washington.edu 30 Mar '00

30 Mar '00

>>>>> "MP" == Michel Pelletier <michel(a)digicool.com> writes: MP> For a few seconds, yes. >> Are there reasons why this is a good idea? MP> Few. >> Bad idea? MP> Many. To concur with Michel -- JPython is a wonderful java prototyping environment. I know that people use it to do real work, as well... But, I'm really not sure that it gains you much, given Java's high footprint on anything that is non-Windows/non-Solaris. Also, JPython loses some of the nicer features of python (such as multiple inheritance; at least the more recent functional versions did, last I looked, 6 months ago). This might be problematic, depending on the guts of Zope. If you really want Java, I suggest sticking with Servlets. Or fork the source code... But Digital Creations, please don't reimplement Zope in JPython... best, -tony -- A.J. Rossini Research Assistant Professor of Biostatistics Biostatistics/Univ. of Washington (Th) Box 357232 206-543-1044 (3286=fax) Center for AIDS Research/HMC/UW (M/F) Box 359931 206-731-3647 (3693=fax) VTN/SCHARP/FHCRC (Tu/W) Box 358080 206-667-7025 (4812=fax) rossini(a)(biostat.washington.edu|u.washington.edu|hivnet.fhcrc.org) http://www.biostat.washington.edu/~rossini

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Downloading large files
by John Eikenberry 29 Mar '00

29 Mar '00

Here's the deal. We have a download area on one of our Zope sites. It contains a few fairly large files (between 45-60Meg). When downloading these files, the Zope process grows by the amount of the file. Ending up at 50+ meg in active memory. The server we run on has a per process memory limitation of ~70Meg (this cannot be raised or avoided). Thus, if 2 people try to download files at the same time... Zope crashes. At the moment the files are just normal file type objects, accessed via normal links. I've messed around with various other download methods (variations using RESPONSE.write), but with no luck. How would I stream a file so that while downloading it doesn't increase the size of the Zope process significantly? Sort of like handling file processing by using a while loop over file.readline() rather than a for loop over file.readlines(). Thanks in advance for any advice. --- John Eikenberry [jae(a)kavi.com - http://zhar.net/] ______________________________________________________________ "A society that will trade a little liberty for a little order will deserve neither and lose both." --B. Franklin

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PDB python debugger, watches?
by Alexander Schonfeld 29 Mar '00

29 Mar '00

I was wondering if the python wizards out there might have some ideas about making a sorta watch like feature with the python debugger. Maybe everytime the (Pdb) prompt comes up some list of objects is evaluated and contents printed? That way you wouldn't have to type in variable names over and over as you step through the program. Any ideas? Might this be possible with aliases? Am I missing something that already exists? Much thanks in advance... Alex. 1010011010 0 Digital Garage 1 Alex Schonfeld 0 alex(a)garage.co.jp - pear 1 090-4429-2323

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dtml tags question
by al028823＠alumail.uji.es 29 Mar '00

29 Mar '00

Hi, Is it possible to write a tag that can be used with and without closing tag? <dtml-translate>...</dtml-translate> or <dtml-translate ...> Thanks, david

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2.1.6 and REQUEST.AUTHENTICATED_USER in ZSQL
by Stuart 'Zen' Bishop 29 Mar '00

29 Mar '00

I upgraded my Zope site last night from 2.1.4 to 2.1.6, which appeared to go happily until I just got in a fault report from one of my helpdesk staff. One of my ZSQL methods is now failing: insert into blah(stuff,responsible) values ( <dtml-sqlvar stuff type=nb>, <dtml-sqlvar expr="REQUEST.AUTHENTICATED_USER.getUserName()" type=nb>) This is now failing with 'Missing input variable, REQUEST.AUTHENTICATED_USER.getUserName()' Is my syntax correct and this is a bug/feature introduced in 2.1.6? Or should I be doing this some other way? If possible, I need to extract the currently authenticated user in the ZSQL method so the operator can't spoof it, and without mucking around with proxy roles. Traceback (innermost last): File /nfs/echidna/r/www/zope/zope2/lib/python/ZPublisher/Publish.py, line 214, in publish_module File /nfs/echidna/r/www/zope/zope2/lib/python/ZPublisher/Publish.py, line 179, in publish File /nfs/echidna/r/www/zope/zope2/lib/python/Zope/__init__.py, line 202, in zpublisher_exception_hook (Object: ElementWithAttributes) File /nfs/echidna/r/www/zope/zope2/lib/python/ZPublisher/Publish.py, line 165, in publish File /nfs/echidna/r/www/zope/zope2/lib/python/ZPublisher/mapply.py, line 160, in mapply (Object: ntpasshandle) File /nfs/echidna/r/www/zope/zope2/lib/python/ZPublisher/Publish.py, line 102, in call_object (Object: ntpasshandle) File /nfs/echidna/r/www/zope/zope2/lib/python/OFS/DTMLMethod.py, line 150, in __call__ (Object: ntpasshandle) File /nfs/echidna/r/www/zope/zope2/lib/python/DocumentTemplate/DT_String.py, line 502, in __call__ (Object: ntpasshandle) File /nfs/echidna/r/www/zope/zope2/lib/python/DocumentTemplate/DT_Util.py, line 335, in eval (Object: qNTPass(uname=uname,password=pw)) (Info: pw) File <string>, line 0, in ? File /nfs/echidna/r/www/zope/zope2/lib/python/Shared/DC/ZRDB/DA.py, line 424, in __call__ (Object: qNTPass) File /nfs/echidna/r/www/zope/zope2/lib/python/DocumentTemplate/DT_String.py, line 502, in __call__ (Object: <string>) File /nfs/echidna/r/www/zope/zope2/lib/python/Shared/DC/ZRDB/sqlvar.py, line 168, in render (Object: REQUEST.AUTHENTICATED_USER.getUserName()) Missing Input: (see above) -- ___ // Zen (alias Stuart Bishop) Work: zen(a)cs.rmit.edu.au // E N Senior Systems Alchemist Play: zen(a)shangri-la.dropbear.id.au //__ Computer Science, RMIT WWW: http://www.cs.rmit.edu.au/~zen

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