January 1999 - Zope - Zope lists

RE: [Zope] - MultiUser Gadfly
by Jeff Bauer 19 Jan '99

19 Jan '99

Randall Marbach [remarbach(a)netscape.net] > I am interested in using Gadfly as a backend to Zope. > I am planning to have a non zope background process > write data into Gadfly and have a Zope process retrieve > and display this data at the same time. Is this possible > to do with Gadfly? > > Does Gadfly have to use client server mode? > > Does Zope support this type of activity? The Gadfly documention provides the answers to your questions: http://www.chordate.com/gadfly.html The short answer: Although Gadfly doesn't provide multiuser -- or even concurrent -- access, you may be able to still use Gadfly if the following is true for your application: 1. You don't mind using Gadfly in client/server mode to serialize the requests via a blocking TCP/IP socket connection. 2. Your queries can be completed within what you consider a reasonable time for your application. (reasonable = avg_query_time * number_pending_requests) If your database isn't too large, this may hold true, especially if you're using the kjbuckets extension. Oh, almost forgot. For certain aspects of your application you might be able to take advantage of using multiple processes with read-only access to the database. Best regards, Jeff Bauer Rubicon, Inc.

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RE: [Zope] - Embedding Perl in Zope/Python?
by Jeff Bauer 19 Jan '99

19 Jan '99

Jim Fulton: > I assume that Perl has an embedding API. I'm guessting > that it should be possible to "embed" (at least some > part of) Perl in Python and make it available as a > Zope extension facility. Many moons ago (before Spam-2!) in a prior company, we embedded Perl in a C program to add scripting capability to a set of applications. This wasn't particularly onerous, even before the era of decent documentation. I don't think this would be a difficult task. The Ruby language already provides access to an embedded Perl interpreter. Thankfully, I can execute all my necessary Perl scripts (those I haven't had time/inclination to rewrite in Python) in a separate process space, where God and/or Guido intended them to be. I would be slightly concerned that people who would want to use Perl scripts in this manner might unknowingly introduce conflicts/competition for system resources. The reason for my concern is that I'm guessing that people who have requested this feature are doing so based on the notion that they have a Perl script that performs some "blackbox" function. After all, you certainly can't comprehend what the script is supposed to do simply by examining the source <0.4 wink>. I wonder, too, if the people who want to execute Perl scripts would be willing to restrict this to mean Perl "CGI" scripts. If the latter, it might be easier, safer, better, to provide a Zope CGI interface to the Perl CGI.pm module. This would have the added advantage of being implemented in Python. Jeff Bauer Rubicon, Inc.

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- Best way to input validation
by Paulo Eduardo Neves 19 Jan '99

19 Jan '99

Oops, excuse me for the incomplete message. Here is the correct one: Hi, I've just notice that I had a misconception about how Zope handle input data validation. I thought it were possible to handle the errors, but it looks like we are doomed to show to the user the python traceback. I believe now that the way to go is to forget the :int and :required specifiers in form attributes and directly code the validation code. Am I right? If so, then besides prototyping there's no use to these specifiers. Is there a best way to validate input form data? regards, -- Paulo Eduardo Neves PUC-Rio de Janeiro Pager: Central: 292-4499 cod. 213 99 64 ou use a URL: http://www.learn.fplf.org.br/neves/mensagempager.html

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RE: [Zope] - Slashdot on Zope
by Paul Everitt 19 Jan '99

19 Jan '99

Gabe wrote: > I wanted to ask the list what people's thoughts were on the > appropriateness of implementing a Slashdot-like site in Zope. Your email this weekend finally prompted me to make the decision on Tabula and to announce our intentions on doing a Zope-Slashdot. Here are my plans with this regard: 1) Create a mailing list for "Zopespot", the name of the community project that coordinates this. 2) When Ken gets here, make him the shepherd for the project. 3) Publish my stab at the requirements document. 4) Turn the zope.org site into a legitimate contender for best portal/community site on the Internet. We intend to invest pretty heavily in making the Zopespot software and the content on zope.org a shining example. 5) Work with others (lwn.net, python.org, etc.) to offer it. > I have looked at the Slashdot source code (in perl) and its > pretty messy > (to put it mildy). I hacked at it to get it to work with the > free Sybase > server on linux and it works reasonably well, but I haven't gone much > beyond that. > > If a slashdot-like site were implemented on Zope, would an > external SQL > database be neccesary, or would the internal object database be > enough? For searching? With the Tabula software available for the Zopespot project, I think you'll be pretty impressed. I loaded a 23 Mb portion of the Internet movie database into a Tabula on my P166 laptop with 64 Mb running NT. Search times for a combination fielded/full-text search came back in under a second. Tabula, which is under the tutelage of Jeffrey Shell here, is a serious piece of gear. Briefly, I see Zopespot as filling the following goals: o Well-organized site with discoverable, timely information. o Harness the energy of contributors. o Apply editorial control. o Provide added value for members. o Demonstration of software potential. o Lower our admin burden while raising scalability. o Integrate many kinds of resources. o Adhere to applicable emerging standards. Zopespot could manag the following kinds of Items: Packages, Documents, News, Projects, BugReports, FeatureRequests, Members, Discussions, CaseStudies, BuzzReports, JobListings, Polls, Ads, etc. Each Item will support and expanded Zope Framework protocol for managed content: id, title, category, keywords, last_update, owner, meta_type, isVisible, summary Users will have a variety of ways to browse and search content. > Building the Slashdot-style site on Zope has the attractive feature of > being very customizable and modular from the get-go (something which > Slashdot source code is trying to get to). Slashdot (the site) gets a > LOT of traffic -- would a zope server be able to handle the (what I'm > guessing is) hundreds of thousands of hits per day? Do we have to wait The current Zope software with Tabula outta beat that pretty easily on a reasonable hardware. Zope2 will make it easier to add more juice to the object system. > until the Medusa integration is complete (not that throwing together a > slashdot clone can be done before digicool folks can get that done). I'm a BIG fan of organizing the requirements before marching off on such an ambitious project. --Paul Paul Everitt Digital Creations paul(a)digicool.com 540.371.6909

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- Disregard the previous "proper move method" message
by Brad Clements 18 Jan '99

18 Jan '99

The problem was that I had also moved a subolder to the root folder, but forgot to copy several properties to the root folder. I notice that the properties page does not have cut/copy or paste. That would be an improvement.. -- ZSQL via ODBC Seems quite speedy to me! Brad Clements, bkc(a)murkworks.com (315)268-1000 http://www.murkworks.com (315)268-9812 Fax netmeeting: ils://ils.murkworks.com ICQ: 14856937 We must come down from our heights, and leave our straight paths, for the byways and low places of life, if we would learn truths by strong contrasts; and in hovels, in forecastles, and among our own outcasts in foreign lands, see what has been wrought upon our fellow-creatures by accident, hardship, or vice. - Richard Henry Dana, Jr. 1836

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- What is the proper way to migrate a Zope Server?
by Brad Clements 18 Jan '99

18 Jan '99

I'm trying to move my win32 ZHTTPServer Implementation of Zope to a new machine and directory. Moving from E:\Program Files\ZopeOne to another machine in D:\ZopeOne I copied the ZopeOne directory tree, changed the start.bat and serve.py file. The manage interface works, but when I try to view my index_html files, I'm getting an error (traceback below). Note the incorrect paths in the traceback (referring to E:\Program files) I uses find from the manage interface to search for E:, can't find it. I grep'd my files, can't find it. Note that I did NOT run the Zope installation script on the target machine, is that the problem? Sorry, an error occurred.<p> <!-- Traceback (innermost last): File E:\Program Files\ZopeOne\lib\python\ZPublisher\Publish.py, line 879, in publish_module File E:\Program Files\ZopeOne\lib\python\ZPublisher\Publish.py, line 595, in publish (Info: /) File E:\Program Files\ZopeOne\lib\python\OFS\Document.py, line 181, in __call__ (Object: index_html) File E:\Program Files\ZopeOne\lib\python\OFS\Document.py, line 177, in __call__ (Object: index_html) File E:\Program Files\ZopeOne\lib\python\DocumentTemplate\DT_String.py, line 514, in __call__ (Object: index_html) File E:\Program Files\ZopeOne\lib\python\OFS\Document.py, line 173, in __call__ (Object: standard_html_header) File E:\Program Files\ZopeOne\lib\python\DocumentTemplate\DT_String.py, line 514, in __call__ (Object: standard_html_header) File E:\Program Files\ZopeOne\lib\python\OFS\Document.py, line 173, in __call__ (Object: StyleOverrides) File E:\Program Files\ZopeOne\lib\python\DocumentTemplate\DT_String.py, line 514, in __call__ (Object: StyleOverrides) KeyError: Sorry, an error occured Brad Clements, bkc(a)murkworks.com (315)268-1000 http://www.murkworks.com (315)268-9812 Fax netmeeting: ils://ils.murkworks.com ICQ: 14856937 We must come down from our heights, and leave our straight paths, for the byways and low places of life, if we would learn truths by strong contrasts; and in hovels, in forecastles, and among our own outcasts in foreign lands, see what has been wrought upon our fellow-creatures by accident, hardship, or vice. - Richard Henry Dana, Jr. 1836

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- Best way to input validation
by Paulo Eduardo Neves 18 Jan '99

18 Jan '99

Hi, I've just notice that I had a misconception about how Zope handle input data validation. I thought it were possible to handle the errors -- Paulo Eduardo Neves PUC-Rio de Janeiro Pager: Central: 292-4499 cod. 213 99 64 ou use a URL: http://www.learn.fplf.org.br/neves/mensagempager.html

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RE: [Zope] - backing up Data.bbb
by Paul Everitt 18 Jan '99

18 Jan '99

Simon wrote: > A related question - I have imported 179 files totalling 50Mb into the > zbase. My find function takes about 10 seconds to list them > all, on a sparc > 10. Would this be considered a large database ? I do want > this to scale up. As indicated in the roadmap I just sent out, the pieces of Tabula that provide scale and searchability are going to migrate their way into Zope. In the near term the only documentation for it will be with Tabula. The plan for Tabula is to make it available to a small audience at first. The main reason is that, until we bring on some more staff, our plate is pretty full supporting (and documenting!) what we already have out there. The audience will be limited to people that are working on projects that we can write case studies on. --Paul Paul Everitt Digital Creations paul(a)digicool.com 540.371.6909

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- MultiUser Gadfly
by Randall Marbach 18 Jan '99

18 Jan '99

I am interested in using Gadfly as a backend to Zope. I am planning to have a non zope background process write data into Gadfly and have a Zope process retrieve and display this data at the same time. Is this possible to do with Gadfly? Does Gadfly have to use client server mode? Does Zope support this type of activity? TIA Randy ____________________________________________________________________ More than just email--Get your FREE Netscape WebMail account today at http://home.netscape.com/netcenter/mail

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- Error uploading a file using the upload tab
by Timothy J. Grant 18 Jan '99

18 Jan '99

Hi, For starters, I want you to know that I have figured out the FSImport thing, that I posted about earlier (I hate to admit this but I had mismatched case between its name and my request!) Secondly, while trying to Upload some HTML source using the Zope Upload tab I got the following error using the ZopeHTTPServer Exception happened during processing of request from ('127.0.0.1', 1403) Traceback (innermost last): File "C:\DevTools\Python\zope\ATGWeb\ZopeHTTPServer\ZopeHTTPServer.py", line 4 19, in handle_request self.process_request(request, client_address) File "C:\DevTools\Python\zope\ATGWeb/lib/python1.5\SocketServer.py", line 239, in process_request self.finish_request(request, client_address) File "C:\DevTools\Python\zope\ATGWeb/lib/python1.5\SocketServer.py", line 243, in finish_request self.RequestHandlerClass(request, client_address, self) File "C:\DevTools\Python\zope\ATGWeb/lib/python1.5\SocketServer.py", line 362, in __init__ self.handle() File "C:\DevTools\Python\zope\ATGWeb/lib/python1.5\BaseHTTPServer.py", line 25 8, in handle method() File "C:\DevTools\Python\zope\ATGWeb\ZopeHTTPServer\ZopeHTTPServer.py", line 3 22, in do_POST if string.find(self.headers.getheader('content-type'), TypeError: argument 1: expected read-only buffer, None found ---------------------------------------- This is on a Win95 box. I was able to select the file using the file selection dialogue box, but on clicking the change button, the error is generated. -- Stand Fast, tjg. =================================== Timothy J. Grant tjg(a)avalongroup.net Avalon Technology Group www.avalongroup.net (503) 246-3630 voice (503) 246-3124 fax This message may be digitally signed with PGP. A PGP signature guarantees that this message really did come from me. For more information regarding digital signatures and encryption, please contact me.

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