June 2001 - Zope - Zope lists

Re: [Zope] Unique IDs
by Tres Seaver 10 Jun '01

10 Jun '01

> "Daniel Fairs" <daniel.fairs(a)spiderplant.net> >> And additionally - instead of using hashes - >> just to use a timestamp? > > > The key thing I need is unpredictability - hence my originally wanting to > use md5 as the last step in the generation. The 'usual' way to do this is to > seed the random number generator with the current time, pull a number out of > that and then do an md5 on it. I've got a number of options now, I'll look > at them > > However, this doesn't answer the first part of my original question - why is > Zope asking me for further credentials when I try to use the md5 module? I'm > guessing md5 is in the security sin bin along with re and other stuff... but > why md5? It isn't a "sin bin"; TTW-scripting (PythonScripts, and, in 2.4, DTML) have a "deny by default" access policy for Python modules; you can "bless" the md5 module using a "patch-style" product, as described in the PythonScript product's README ('lib/python/Products/PythonScripts/README.txt'). You can use an ExternalMethod, if you prefer not to go this route. Tres. -- =============================================================== Tres Seaver tseaver(a)digicool.com Digital Creations "Zope Dealers" http://www.zope.org

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Re: [Zope] Bug tracking product
by Tres Seaver 10 Jun '01

10 Jun '01

Gitte Wange <gitte(a)mmmanager.org> wrote > I am looking for a bug tracking product for Zope that also can contain > feature requests. Everybody should be able to enter bugs and/or feature > requests. > > Does suck a product exists ? http://www.zope.org/Members/klm/TrackerWiki/FrontPage Tres. -- =============================================================== Tres Seaver tseaver(a)digicool.com Digital Creations "Zope Dealers" http://www.zope.org

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transaction control from Zope to Postgresql?
by Reinoud van Leeuwen 10 Jun '01

10 Jun '01

Hello world, I am in need for a way to explicitely contral transaction behaviour for a group of inserts in a postgresql database. The DTML script I use first inserts a header record and after that some detail records. The postgresql function that does the inserts might return an errorstring. So I tried the following code (simplified for readability) <dtml-try> <dtml-call "sql_to_insert_head_record (some_parameters)"> <dtml-in "a_loop_over_detail_lines"> <dtml-if "check_detail_line"> <dtml-raise required_attribute_missing> errormessage </dtml-raise> </dtml-if> <dtml-call "sql_to_insert_detail_line"> <dtml-if "check_returncode"> <dtml-raise inserterror> error inserting! </dtml-raise> </dtml-if> </dtml-in> <dtml-except> insert failed (error: <dtml-var error_value>) <dtml-else> object added to database </dtml-try> What I would like to do is that all the SQL executed between dtml-try and dtml-except is rolled back when the exception is raised. I tried sending "begin" and "rollback" to the database, but that does not work because Zope sends some transaction control by itself. I tried getting get_transaction().begin() and get_transaction().abort() to work, but I cannot reach that function from dtml not python script. Anyone has some clues to spare? Have a nice weekend, Reinoud

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RE: [Zope] Sharing Database connections and/or methods between Zo pes?
by Schmidt, Allen J. 10 Jun '01

10 Jun '01

Well, with my limited Python, that is easier said than done. Something to shoot for though. Thanks Andy!!! Allen -----Original Message----- From: Andy McKay [mailto:andym@ActiveState.com] Sent: Tuesday, June 05, 2001 1:19 PM To: Schmidt, Allen J.; zope(a)zope.org Subject: Re: [Zope] Sharing Database connections and/or methods between Zopes? Here's how I would do it: Write a python script that calls your SQL and transfer the results into a list of dicts and returns that. You can then call the python script through xml-rpc and can hence parse the results. Cheers. -- Andy McKay. ----- Original Message ----- From: "Schmidt, Allen J." <aschmidt(a)nv.cc.va.us> To: "'Andy McKay'" <andym(a)ActiveState.com>; "Schmidt, Allen J." <aschmidt(a)nv.cc.va.us>; <zope(a)zope.org> Sent: Tuesday, June 05, 2001 10:05 AM Subject: RE: [Zope] Sharing Database connections and/or methods between Zopes? > Don't even care about slow at this point! Just the functionality.... > > So I can assume then that remote access of ZSQL methods is not possible?? > > > Seems like ZEO is the answer for everything! <8^) > > If anyone can think of a reason why this would not work, please drop a note. > If this is considered OT then jsut email me directly. > > -----Original Message----- > From: Andy McKay [mailto:andym@ActiveState.com] > Sent: Tuesday, June 05, 2001 1:09 PM > To: Schmidt, Allen J.; zope(a)zope.org > Subject: Re: [Zope] Sharing Database connections and/or methods between > Zopes? > > > Ah well thats the point of a database of course, is you can share it. You > could concont some other solution with other stuff but you might find it > slow. > > This sound like a perfect job for ZEO. > > Cheers. > -- > Andy McKay. > _______________________________________________ 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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Re: Zope docs (was Re: [Zope] I was wondfe)
by Oliver Bleutgen 10 Jun '01

10 Jun '01

>> > > I think folks need to start becoming more specific when >> > they say "Zope >> > > isn't well documented". > Let me add my own piece... > imho zope is quite well documented. I mean, if you need to find a function > name and it's use, you'll allways find it in a few minutes. If you need a > dtml reference, you'll find it. If you need to learn python, well, buy a > book / see the online site. > Even the zope api is not poorly documented. (just tried docfinder of > Dieter - it's a great tool) > The feeling of people when they say zope is not well documented is > probably > not because there is lack of "traditional" documentation. > What is really needed is implementations examples of canonical problems. I think there are many examples already there, it's just sometimes hard to find them (and to be sure these examples are "done right"). Perhaps we need something like the open directory project (dmoz.org) for some elements of zope documentation. OTOH, perhaps we already have an effort like this with the ZDP. Only - my impression is it doesn't seem to work very well, perhaps it's too ambitious. One thing which I have missed often lately was a more fine grained categorization of the howtos on zope.org similar to that for the products. I just joined zope.org so I'm not clear about whats technically possible with such an account, but if there's need I would look into starting some smallish project that makes it possible for the community to do that on ourselves. But I admit, I think such functionality would better fit as a core component of zope.org, but that would mean work for DC. Also the possibility to comment/rate on products and howtows would be nice, as would be a fulltext search on all howtos. cheers, oliver

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How to remove zope.pcgi from URL (in IIS)?
by Satheesh Babu 10 Jun '01

10 Jun '01

Hello, I'm trying to run Zope behind IIS, in PCGI mode. It works reasonably except that I can never login to management interface. (I can do so by using ZServer directly). However, my current problem is that Zope sites have an URL like http://mysite.com/cgi-bin/zope.pcgi/blahblah Is there a way in IIS to make it look like http://mysite.com/blahblah or even http://mysite.com/biggerblah/blahblah ? So far I was using Apache where this is easy with ProxyPass. Now, (at least for some time) I'm stuck with IIS. I went through the solution where you use a 404.asp page that does some sort of proxying. Any other solutions? We've a big static site served by IIS and some ASP. For the moment, I must use the same server machine for Zope too. And most corporate firewalls block ports other than 80. That is why I'm trying to front end Zope with IIS. Many thanks in advance V. Satheesh Babu http://vsbabu.csoft.net "Power corrupts. PowerPoint corrupts absolutely."

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Re: [Zope] Unique IDs
by Oliver Bleutgen 10 Jun '01

10 Jun '01

>> Or is there a better way of doing it? > One additional: using a hash algorithm does produce unique values in > many cases but doesn't guarantee them. If uniqueness is an absolute > requirement you have to check if a key already exists and generate > another one in this case (using a different secret f.e.). Hm, out of interest, is there a way to be sure to get atomicity for the above algorithm? Otherwise there is always a small timespan in which an object with the same name could have been created - after the above check, but before you create it. Wouldn't it be simpler (in typical zope cases) to just try to create the objects in the same folder and just wrap the id generation and object creation in a try/except clause? And additionally - instead of using hashes - just to use a timestamp? cheers, oliver

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Re: [Zope-dev] Advanced REQUEST inside Python Class Problem
by Oliver Bleutgen 10 Jun '01

10 Jun '01

> Hello everyone, > I try to access the REQUEST variable in a Python class, but in certain > cases this gives me a real headache. > If I call my object with <dtml-var ObjectInstance>, then I can refer to > the > request variable in my Python code with self.REQUEST > But, if I try: <dtml-var "ObjectInstance">, then I cannot use > self.REQUEST, > since the namespace is somehow not passed. BTW, the same seems to be true > with properties inside a parent object. For some reason, if I call > __getattr__, the entire "global namespace" (REQUEST and Aquisition) does > not work correctly anymore. > Has anyone a clue for me? Hi Stephan, <dtml-var ObjectInstance> does some zope-specific argument passing. This magic isn't available if you do <dtml-var "ObjectInstance()"> (notice the brackets, the way you did it would just cause to render something like <ObjectInstance at #2424234> and wouldn't call the object). If you do the above you have to explicitly pass the arguments, i.e. REQUEST and _. Take a look at dieter maurers excellent writings at http://www.dieter.handshake.de/pyprojects/zope/book/chap3.html for instance for a concise explanation what kind of magic happens with dtml-var. cheers, olivver

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Bug tracking product
by Gitte Wange 10 Jun '01

10 Jun '01

Hello, I am looking for a bug tracking product for Zope that also can contain feature requests. Everybody should be able to enter bugs and/or feature requests. Does suck a product exists ? Regards, -- ************************ Gitte Wange Jensen System Squid Developer MMManager Aps +45 29 72 79 72 gitte(a)mmmanager.org ************************

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Re: [Zope] Unique IDs
by Frank Tegtmeyer 10 Jun '01

10 Jun '01

> Or is there a better way of doing it? One additional: using a hash algorithm does produce unique values in many cases but doesn't guarantee them. If uniqueness is an absolute requirement you have to check if a key already exists and generate another one in this case (using a different secret f.e.). Regards, Frank

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