August 1999 - Zope-Dev

RE: [Zope-dev] Python & XML what about Java
by Michel Pelletier 24 Aug '99

24 Aug '99

> -----Original Message----- > From: Cory L Hubert [mailto:clhubert@netzero.net] > Sent: Tuesday, August 24, 1999 3:13 PM > To: zope-dev(a)zope.org > Subject: [Zope-dev] Python & XML what about Java > > > > Hey. I am new to Zope. I just tripped over it the > other day and I am > extremly interested. The only thing I am concerned about is > Zope's XML > support. A lot of XML projects I am getting involved in > require Java and > Java Servlets (for obvious reasons). Zope seems to take the > python route to > supporting XML. > Does Zope's have any Java support? If not, does it > have plans to support > Java/XML. > I think Zope would make an excellent java servlet platform. You'd just have to write the plumbing to connection the Zope object model to Java. Note that this is a very clean mapping, just look at JPython. The Apache folks have been doing some good development along these lines, perhaps much of their effort can be integrated into a plug-in for Zope. Also, I don't think there is way that much more XML functionality in Java than in Python. Python takes a route where you are given a small set of very powerful tools, and then a super clean fast-development scripting language (python) to glue them together. I would think that developing XML apps in Python takes as much time as doing them in Java, even with all the gobs and gobs of Java tools that exist at the moment. -Michel > > _______________________________________________ > Zope-Dev maillist - Zope-Dev(a)zope.org > http://www.zope.org/mailman/listinfo/zope-dev > > (To receive general Zope announcements, see: > http://www.zope.org/mailman/listinfo/zope-announce > > For non-developer, user-level issues, > zope(a)zope.org, http://www.zope.org/mailman/listinfo/zope ) >

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Try tag with else block, or finally block
by Martijn Pieters 24 Aug '99

24 Aug '99

Hello fellow Zope developers I extended the new 'try' tag to include support for an optional 'else' block, and whipped in support for 'try..finally' as well. The try tag now has this form: try [[except]* [else] | [finally]] /try. I also added more rigorous checks on it's syntax, like allowing only one default exception handler. Attached you'll find a patch against the latest CVS, but it will work on Zope 2.0a4 and higher. The file to patch is lib/python/DocumentTemplate/DT_Try.py. Let me know what you'll think. I'll post this patch to the Collector as well. Here is it's documentation string: Zope DTML Exception handling usage:       or:    The DTML try tag functions quite like Python's try command. The contents of the try tag are rendered. If an exception is raised, then control switches to the except blocks. The first except block to match the type of the error raised is rendered. If an except block has no name then it matches all raised errors. The try tag understands class-based exceptions, as well as string-based exceptions. Note: the 'raise' tag raises string-based exceptions. Inside the except blocks information about the error is available via three variables. 'error_type' -- This variable is the name of the exception caught. 'error_value' -- This is the caught exception's value. 'error_tb' -- This is a traceback for the caught exception. The optional else block is rendered when no exception occurs in the try block. Exceptions in the else block are not handled by the preceding except blocks. The try..finally form specifies a `cleanup` block, to be rendered even when an exception occurs. Note that any rendered result is discarded if an exception occurs in either the try or finally blocks. The finally block is only of any use if you need to clean up something that will not be cleaned up by the transaction abort code. The finally block will always be called, wether there was an exception in the try block or not, or wether or not you used a return tag in the try block. Note that any output of the finally block is discarded if you use a return tag in the try block. If an exception occurs in the try block, and an exception occurs in the finally block, or you use the return tag in that block, any information about that first exception is lost. No information about the first exception is available in the finally block. Also, if you use a return tag in the try block, and an exception occurs in the finally block or you use a return tag there as well, the result returned in the try block will be lost. Original version by Jordan B. Baker. Try..finally and try..else implementation by Martijn Pieters. -- Martijn Pieters, Web Developer | Antraciet http://www.antraciet.nl | Tel: +31-35-7502100 Fax: +31-35-7502111 | mailto:mj@antraciet.nl http://www.antraciet.nl/~mj | PGP: http://wwwkeys.nl.pgp.net:11371/pks/lookup?op=get&search=0xA8A32149 ------------------------------------------

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Acqusition
by Dody Gunawinata 24 Aug '99

24 Aug '99

i'm still puzzled about the concept of Acqusition. It states that the object in Zope can read settings from it's environment, and all the example i've been reading is about reading the folder id properties (yeah, and that person phone number etc). my question : is it possible to introduce more custom properties into folders ? dody italy

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RE: [Zope-dev] Speed..
by Paul Everitt 23 Aug '99

23 Aug '99

If I remember correctly, this issue came up several months ago and the answer was Windows network lookups. Are you perchance working offline when you experience the slowdowns? Don't worry, I can guarantee you that Zope 1.10.3 on a Win95, 166 Mhz machine will do several hits per second. What you are seeing is Zope not being configured correctly (unfortunately I don't remember the answer). --Paul > -----Original Message----- > From: Dody Gunawinata [mailto:dody_g@eles.com] > Sent: Saturday, September 25, 1999 8:15 PM > To: zope-dev(a)zope.org > Subject: [Zope-dev] Speed.. > > > > Hi all, > > i'm running Zope on with P-200 64 Mb Win95-OSR 2 with ZoneHttpServer. > And it's slow (really slow, it takes about 15 seconds in local machine > just for the browser to properly display the management console) > > I've tried to switched the python int shipped with the > package to my own > full python installation, and it still is slow. > > Anyway have an advice on speeding it up ? Could it be the built in > webserver that is slow ? > > thanks > > dody, > italy > > _______________________________________________ > Zope-Dev maillist - Zope-Dev(a)zope.org > http://www.zope.org/mailman/listinfo/zope-dev > > (To receive general Zope announcements, see: > http://www.zope.org/mailman/listinfo/zope-announce > > For non-developer, user-level issues, > zope(a)zope.org, http://www.zope.org/mailman/listinfo/zope ) >

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Zope still 'hanging' - LinuxPPC, 2.0b5
by Tony McDonald 22 Aug '99

22 Aug '99

Hi all, I posted a while back that Zope 2.0b5 seemed ok re: hanging under Solaris 5.6 using the binary release. That still seems the case, although I've not had a chance to batter the system yet, I'll be able to report better later in the week. However, I d/led the 2.0b5 source version for my LinuxPPC box at home and have built it in the same manner I have the other 2.0betas that I have (2.0b1 and 2.0b4). It still hangs for quite long periods of time, and it seems totally random to me. I'm afraid I can't really give you more information than that, but if someone tells me the magic to type, I'll do so and report back. tone.

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Multiples python error?
by Andreas Kostyrka 22 Aug '99

22 Aug '99

Hi! I've been fooling around with a new RH6.0 box here and I've installed python and ZOPE in a /opt directory. Well, pcgi doesn't like that to much, but this is not what this is post is about: Zope version: Zope 2.0.0b5 (source release, python 1.5.1, linux2) Python version: 1.5.2 (#1, Aug 19 1999, 19:28:50) [GCC egcs-2.91.66 19990314/Linux (egcs- System Platform: linux2 Process ID: 5143 Running for: 21 hours 4 min 34 sec Well, I'm just wondering where does this python 1.5.1 come from? RH6.0 does come with a python 1.5.1 in /usr, but this ZOPE installation doesn't use it at all. Andreas -- Andreas Kostyrka | andreas(a)mtg.co.at phone: +43/1/7070750 | phone: +43/676/4091256 MTG Handelsges.m.b.H. | fax: +43/1/7065299 Raiffeisenstr. 16/9 | 2320 Zwoelfaxing AUSTRIA

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Re: [Zope-dev] the right way to do wiki in zope ?
by Simon Michael 21 Aug '99

21 Aug '99

In another thread, Anthony wrote: > Question: Can we make ZClasses directly on ZPT? Ditto. If not, I wondered if one could actually hack wiki functionality on there using nothing but DTML. I'm not yet convinced you couldn't. Zclasses - mindbending stuff. I did some experimenting on my local server, and here's where I'm at. I made a Zclass called WikiDTMLPage, based on DTML Document. I gave it an index_html method which translates words which match the wiki link pattern to relative hyperlinks, this way: <dtml-var "_.ts_regex.gsub( '\([A-Z]+[a-z]+[A-Z][A-Za-z]*\|[A-Z][A-Z]+[a-z][A-Za-z]*\|_[\\\w.:_]+_\)', '<A HREF=\\1>\\1</a>', data) "> data is a zclass property I added; I'd rather use the DTML document's existing data attribute but couldn't find the right syntax. I added ts_regex to the DTML namespace - DC, is there any reason not to provide ts_regex or re to DTML users ? Regexps are darn useful. This allows you to create & edit wiki pages, displays the links, but doesn't help you create new pages of course. A helper external method for this class seems like a good way to go. > Once I fix up the namespace mangling that Zope is doing (and which > prevents freezing it - python is already frozen) I'll whip up a ZikiSpace. Excellent. -Simon

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Re: [Zope-dev] the right way to do wiki in zope ?
by Simon Michael 20 Aug '99

20 Aug '99

Simon Michael <simon(a)joyful.com> writes: > This allows you to create & edit wiki pages, displays the links, but > doesn't help you create new pages of course. I mean, it doesn't help you create them in the wiki way (mention a ANewPage somewhere and a question mark appears beside it, which will create the page when you click on it).

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Session Product
by Scott Robertson 20 Aug '99

20 Aug '99

I just uploaded an Experimental Sessions Product to the Contrib section on zope.org. This is code I was using to explore the concept of users session/shopping carts for the upcoming ZCommerce API that I'm working on. It's no where near done, I want to get back to writing the API docs, but I thought some of you might get a kick out of it. Here's a teaser from the comments in the source code: The Session Object WARNING!!! This is a reference implementation only. I wrote this to explore session concepts and to get a better idea of what I could or could not do with Zope's security model. This code by no means is complete pretty or even that useful. But it has proven that the session concept is valid. What is a session? A session object is an object that behaves like a folder in zope. If you access <Session FolderId>/docLogin via the web, the session folder will validate your username and password based off of the first acl_users folder that it finds via acquisition. Once the user has been authorized the Session Folder creates a brand new Session Instance and stores the user information in the Session Instance. Whenever an object is accessed through the Session Instance the user is equivalent to the user that originally logged in. In effect the authorization information is stored in PATH_INFO instead of a cookie or using standard HTTP authentication methods. Session Instances will/should be automatically deleted if the user has been idle longer than the time to live property. The advantages to this scheme are. (Of course most of this is not implemented in this sample) * A user can be logged in as more than one person at a time, without having to restart there web browser. * An admin can get a list of all the people currently logged into Zope. * You can limit the amount of times the same user id is logged into Zope at once. * The Session Folder should be able to use any type of acl_users folder, so authentication can be done against the User, UserDB, or UserLDAP already or any other custom User Folder. Because the user is only looked up once, Zope does not have to constantly go back to the data source for every page request and perform authentication like it does now. * Sessions can time out values so a user can be logged out if they are inactive for to long. i.e. They leave there computer unattended, they will be logged out. * Sessions can be used to store state information between web requests so that the user's current IP address can be stored within the session which can prevent people from hijacking sessions. Also makes it really easy to implement a shopping cart object. =) * The scheme is token based, which means that the user name and password aren't passed around in the clear, so it might be more secure. Of course the session would have to be created under SSL for maximum protection, but then once the session has been created the session could be accessed using normal HTTP for speed. * There's many more, but I'm tired of typing. --------------------------------------------------- - Scott Robertson Phone: 714.972.2299 - - CodeIt Computing Fax: 714.972.2399 - - http://codeit.com - ---------------------------------------------------

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RE: [Zope-dev] 2nd of back-to-back communications with Zope hangi ng?
by Brian Lloyd 20 Aug '99

20 Aug '99

Hi Marc. I _think_ we've found a fix for this - I've attached a new select_trigger.py file that should replace the one in the ZServer/medusa directory of your installation. If you get a chance to drop this updated file in and restart your site (so that the change can take effect) can you let me know if this takes care of the problem? Thanks! Brian Lloyd brian(a)digicool.com Software Engineer 540.371.6909 Digital Creations http://www.digicool.com > -----Original Message----- > From: Marc.Conley(a)mapics.com [mailto:Marc.Conley@mapics.com] > Sent: Monday, August 16, 1999 1:31 PM > To: zope-dev(a)zope.org > Cc: Marc.Conley(a)mapics.com > Subject: [Zope-dev] 2nd of back-to-back communications with Zope > hanging? > > > I am using 2.0.0b1. I am interested in whether or not anyone > else is having > a problem > with two back-to-back communications with Zope hanging for a > period of time but ultimately > working? > > I am opening a URL on a Java client using UrlConnection which > is requesting that Zope run an external > method. The purpose of the external method is to create a > folder and add a property to the folder. > > After I get the result back from the above external method, I > immediately open another Url from > the Java client which calls another external method which > requests the information that was added > (the folder's property). > > When I open these Url's back-to-back, I finally get the > response I am looking for after about 30 seconds. If I put a > 1/2 second delay before opening the 2nd Url, it eliminates > the problem--I get the response immediately. But, this > is a bandaid for some kind of problem. > > Can anyone explain what I am experiencing here--have you had > similar problems? Or even better, > is this something that has been fixed recently. Overall, > 2.0.0b1 is stable, etc. for what I am doing, so I > was trying to wait until the final general release 2.0 comes > out to switch. > > Thanks for any help/tips/explanations you may have! > > > _______________________________________________ > Zope-Dev maillist - Zope-Dev(a)zope.org > http://www.zope.org/mailman/listinfo/zope-dev > > (To receive general Zope announcements, see: > http://www.zope.org/mailman/listinfo/zope-announce > > For non-developer, user-level issues, > zope(a)zope.org, http://www.zope.org/mailman/listinfo/zope ) >

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