January 2001 - Zope - Zope lists

Re: [Zope] Question: How to generate a core file in Solaris 2.6
by Jon Prettyman 03 Jan '01

03 Jan '01

I had a similar problem quite some time ago. I never could get a core file to generate, but since the crash occured so often, I was able to attach gdb (GNU debugger) to the process and was able to see the segmentation violation that was occurring. I never did figure out why I couldn't get a core file generated. -jjp Michael Best <mbest(a)emergence.com> writes: > I am running Zope 2.1.6 and 2.2.3 under Solaris, and we are having some > stability problems. With some previous posts from developers we seem to > think that it might be a custom product that we are using that contains > some c code. We can't really be certain, although we are devising some > tests to examine that possibility. > > However, since the Zope crashes every few hours, and no core file comes > out we are at a loss at how to get one. > > We have tried increasing the ulimit in the startup script, but this > doesn't appear to generate a core. > > Primarily Zope 2.2.3 and Solaris 2.6 (Patched to a couple of months > ago). > > Help? >

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Re: [Zope] Leaking Oracle connections & processes
by Dieter Maurer 03 Jan '01

03 Jan '01

Shai Berger writes: > We are trying to build a site with Zope and Oracle, and we see again > and again a situation where Oracle connections and processes are > being leaked: the more we work, the more there are, until we reach > Oracle's limit for number of processes. At this point, the Connection > objects close on their own, and you can't even open SQL*Plus until > Zope is closed or restarted. We have had this problem, too. Maybe we still have it but to a much lesser extend. What we did: * increase ZODB's cache size. Formerly, Oracle connections have been flushed from the cache with a high frequency. Apparently, some connections was not closed, even though the objects had been flushed from the cache. This migh be in relation to the "Record" leak closed recently (Zope 2.2.5b1). * install the latest DCOracle. I think, the two steps did not remove all our problems, but had reduced it to an extend we can live with, until we know more about the problem. This implies, we are interested in what you may find out. Dieter

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EVAL DTML?
by Brian Withun 03 Jan '01

03 Jan '01

Is it possible to, say, retrieve DTML code from an external database (such as Sybase) and then have that DTML code render itself? As I recall there is a security issue with Zope allowing Python to EVAL dtml.. I am not finding references to this kind of activity online. Has anyone accomplished something similar? ------------ Brian Withun

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html_quote in python methods?
by Jim Washington 03 Jan '01

03 Jan '01

I am using Python Methods a lot now. Good: no more <dtml-with> to get to the objects I need. Yay! no more worrying about closing blocks. Yay! OK, when I make a syntax error, there is no help in the traceback. My Python is getting better and better as a result. To give something back, I have a hint that took me a while to figure out: print '<td width="33%">%s</td>' % (self.thevariable) will not work. The first % needs to be escaped like so: print '<td width="33%%">%s</td>' % (self.thevariable) Now, can I use html_quote in a Python Method? I am letting people enter data for redisplay, and I know some Bozo (TM) will somehow put in "<table>" and break the page. Can I keep this from happening? html_quote does not seem to be in the Python Method namespace. Regards, -- Jim Washington

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Re: [Zope] standard_error_message woes!
by Dieter Maurer 03 Jan '01

03 Jan '01

Chris Withers writes: > John Chandler wrote: > > > > As already mentioned, not all errors (unfortunately) get handled by > > standard_error_message - authorisation being the main culprit. In addition, if > > an error occurs in a standard_error_message it'll also cause the plain, default > > error page to be displayed. > > Hurm... I would have thought/it would be nice if an error occurs in > standard_error_message then, the next standard_error_message up the > acquisition path would get used, resorting to the hard coded one only if > there isn't anything else... I do not agree with you here. You should be able to make "standard_error_message"s that do not generate secondary errors. If you fail, a crude minimal error handling should be okay as a last resort. Dieter

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RE: [Zope] Advice on searching/indexing Word documents?
by sean.upton＠uniontrib.com 03 Jan '01

03 Jan '01

I really like the idea of extending OFS:File to support different file types, but what I would like to see is something that is format/filter/library agnostic. That is to say, that perhaps the way we ought to go about this is to create an API framework that upon upload filters the file with a specified filter for its mime-type. Perhaps creating a generic base class that implements a generic API for filtering a file, from which to extend by inheriting more specific classes for files of particular types or groups (fine grained to mime-type or grouped in category, eg. "Illustration"). Having such a generic framework would enable Zope to be an excellent platform for digital asset management; Suppose you had a class for all files for a particular purpose, and those files would always be of a partiaular set of mime-types, like Illustrator, PDf, or postscript. For example, if someone working at a newspaper creates a new file class instance called "DisplayAd," which is used for postscript files with embedded fonts, containing specific text, a filter set up as part of the extended class for DisplayAd file would detect the type of file, determine it was PDF, and filter out the text, and the face names of the embedded fonts. If the file was a PDF or an AI file, it would then run the appropriate filter. It might also be nice to have a extended class (inherited from file) that works for all types, and keeps some sort of configurable plugin registry of sorts, so that we can create plugin classes for specific mime-types, but only have to use one class for the objects themselves. This might be more practical. One thing that seems important: creating an API like this could allow us to write filter "plugins" in a variety of Zope supported configs, like completely in python, a python class extending a C shared library, something written in a combination of C/Lex, or the python-based plex scanner that was mentioned earlier - for that matter, even proprietary user-space binaries called via python code might be fair game... I really think that this idea has potential as a project, and would be willing to contribute. Sean -----Original Message----- From: Bjorn Stabell [mailto:bjorn@exoweb.net] Sent: Tuesday, January 02, 2001 10:07 PM To: zope(a)zope.org Subject: RE: [Zope] Advice on searching/indexing Word documents? This is something I've been longing for a long time. Wvare is cool, and it should also be able to access properties of many Windows (OLE) documents, not just Word documents. I've been thinking about extending the File class so that it becomes aware of the different file types and allows access to (read/write) meta data and indexing of the files' content. If we can setup a nice framework for it, I'm sure a lot of people could contribute code for specific file formats. Bye, -- Bjorn -----Original Message----- From: Jens Vagelpohl [mailto:jens@digicool.com] Posted At: Wednesday, January 03, 2001 11:28 Posted To: Zope List Conversation: [Zope] Advice on searching/indexing Word documents? Subject: Re: [Zope] Advice on searching/indexing Word documents? if you're on linux check out WVWare: http://www.wvware.com it's a C library that handles all word doc formats since 6.0 or so jens On Tue, 02 Jan 2001, Bowyer, Alex wrote: > Our company has a repository of staff CVs (Resumes) as Word Documents and I > am about to embark on creating a new feature for our Zope Intranet to allow > project managers to search those documents for keywords such as particular > skills or projects. > > I am thinking about several possibilities such as a skills/CVs database > linked in via ODBC, or some task that converts the Word documents to text > files which can then be searched by Zope (I think Zope can do this, and I > assume it can't search Word format directly?). > > Has anyone ever approached a similar problem, does anyone have any tips on > how to index/search a load of documents in Zope? > > Any tips/suggestions/comments would be most welcome. > > Thanks, > > Alex _______________________________________________ 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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Question: How to generate a core file in Solaris 2.6
by Michael Best 03 Jan '01

03 Jan '01

I am running Zope 2.1.6 and 2.2.3 under Solaris, and we are having some stability problems. With some previous posts from developers we seem to think that it might be a custom product that we are using that contains some c code. We can't really be certain, although we are devising some tests to examine that possibility. However, since the Zope crashes every few hours, and no core file comes out we are at a loss at how to get one. We have tried increasing the ulimit in the startup script, but this doesn't appear to generate a core. Primarily Zope 2.2.3 and Solaris 2.6 (Patched to a couple of months ago). Help? -- Michael Best Systems Administrator ph 780-413-6397 x230 Emergence By Design fax 780-433-7548 #200, 11209 Jasper Avenue toll 866-860-2666 Edmonton, Alberta, T5K 0L5

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First Project
by Koch Marc 03 Jan '01

03 Jan '01

Thank you, ...for your tip with the PARENTS[0].objectValues('File') Please let me ask your advice on how to realize the following: I would like to build an application for handling development requests. These requests should be submitted by our end-users through our Intranet to my team. We then look at each new request and dispatch it to one or more development team for approval (or rejection). At this stage: - The end-user should be able to see that his request has been dispatched - The concerned development team(s) should see that there is a new request, they could look at it and accept it or reject it and give a comment When all the teams have replied, my team would add a summarized comment to the request and the end-user should be able to see this. At this point, the request handling for my team is at its end. Requests should be submitted by a Web-Form and may contain an arbitrary file (eg. Word Document). The end-user and the development team should see only what they are concerned with. My team needs a global overview. Do I need a database or would basic Zope objects work? Where to begin? I feel that there should be a 'Request' object (document or method?) with a few methods for adding, dispatching, ... Thanks for any advice [One way of learning is by doing] --------------------- Un courrier �lectronique n'engage pas son �metteur. Tout message susceptible de comporter un engagement doit �tre confirm� par un �crit d�ment sign�. An electronic message is not binding on its sender. Any message referring to a binding engagement must be confirmed in writing and duly signed. Ein elektronischer Brief bzw. eine elektronische Nachricht ist f�r den Absender nicht verbindlich. Jede Nachricht, welche eine Verpflichtung beinhaltet, mu� schriftlich best�tigt und ordnungsgem�� unterzeichnet werden. ---------------------

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Core Session Tracking kudos & namespaces
by Bob Sidebotham 03 Jan '01

03 Jan '01

1. The Core Session Tracking looks like it will be really helpful. I AM BLOWN AWAY BY THE QUALITY OF THE DOCUMENTATION. Congratulations for making really readable, easy to use installation and use instructions. Part of the reason I'm so blown away, of course, is that the quality of this documentation is so very much superior to most of the existing documentation. The author obviously put himself in the position of someone who didn't know anything about the topic, and wrote the documentation to satisfy this person (i.e. me). Thanks! 2. Question. The interface to the session data object, requiring set/get calls to get key/value pairs seems a little inconsistent with the very simple existing interfaces for other zope namespaces. As a newbie, I admit to being very confused about namespaces in zope, and the GOOD THING about the core session tracking is that it is very clear that you're accessing a variable from that scope. There's no way you can accidently acquire something else. On the other hand, the ability to access the session variables with simple variable references seems like it would be a win (especially if they were safely qualified by the session object). I really just want to do something like "SESSION.varname". Is this something that can be wrapped on top of the existing interface? Bob Sidebotham bob_sidebotham(a)yahoo.com __________________________________________________ Do You Yahoo!? Yahoo! Photos - Share your holiday photos online! http://photos.yahoo.com/

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(no subject)
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03 Jan '01

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