Zope-Dev July 1999

zope-dev@zope.dev

72 participants
209 discussions

XML Document appendChild questions
by Martijn Faassen 24 Aug '99

24 Aug '99

Hi there, I've been experimenting with manipulating XML documents in Zope. At first, it seemed to work: I made an XML document called 'testdoc' with the following content: <?xml version="1.0"?> <list> <li>Zero</li> <li>One</li> <li>Two</li> <li>Three</li> </list> And I made another one called 'someElement' with the following content: <?xml version="1.0"?> <li>Another list item</li> Then I made a DTML method called 'testInsert' (actually I'm appending), doing the following:   <p>Done insertion</p>  This indeed adds the new element to the <list> in the testdoc. However, the <li>Another list item</li> disappears from someElement! Is this what should happen? A clue can be found in the XML Document source (Node.py): def appendChild(self, newChild): """ Adds the node newChild to the end of the list of children of this node. If the newChild is already in the tree, it is first removed. """ But in this case 'newChild' is in *another* tree and it is removed as well. Is this intentionally? It seems as if it would be difficult to build trees now, or am I doing something wrong and shouldn't I use XML Documents for XML fragments that I want to insert? I think it may in fact be hard to determine if a cross-tree append is taking place, efficiently at least; right now it is only checked if the newChild to be inserted has a parentNode at all (and removes it from that parent node if so). Regards, Martijn

4 8

preventing acquisition
by Robin Becker 03 Aug '99

03 Aug '99

I have found acquisition useful in several cases, but I would like to eliminate it for certain folders I have /-index_html | |--DOCS/ | |--IMAGES/ | |--RUBBISH/ it's useful in DOCS/mydoc_html to refer to IMAGES/myimage.gif, but I really don't want RUBBISH/index_html to be available as /DOCS/RUBBISH Do I have to go through a whole rigmarole of defining roles/users or is there some easy way to make RUBBISH non-acquirable? -- Robin Becker

3 6

Dynamic SQL statement construct
by HCSCCS＠prudential.com.my 02 Aug '99

02 Aug '99

As usual, I'm beeen using Zope-1.10.3-src, Zap-1.10, RedHat 5.2 and lately ZPyGresql Database Adaptor. I wonder whether we can dymanicaly construct an SQL statement. Below is the following situation: DTML Method 1 :- ============ Contain 3 same combo box as the first, second and third sort key. Each combo box contains 3 sort keys, Aeg. A, B, C. User will choose the combination of keys they want and submit the page.. DTML Method 2 : ============ Display the information as the sorted manner defined in the earlier page. So how do you guys think? Can Z SQL Method do that? The followings are the possible key combinations: ABC ACB BAC BCA CAB CBA AB AC BA BC CA CB A B C Do we need to BUILD 15 Z SQL Method?? If not, what is the proper way? Please reply to hcsccs(a)prudential.com.my as well. Thanks a lot, Paul Chung Paul Chung Executive IT Department Prudential Assurance Malaysia Berhad

2 1

Strange Characters and Zope
by Robin Becker 02 Aug '99

02 Aug '99

I was demonstrating the implementation in Zope of my Generational Accounting web model. The Academic saw how marvellous it was and wanted immediately to change some of the text in the pages. It was in word so I said 'save as html' and then we'll hack it into the database pages. Foolish me. Word inserts many strange characters into it's version of HTML. One of them being character 0x92. This causes the page to start flinging out save as dialogs. Can someone enlighten me as to what characters may be safely embedded/used in Zope DTML. We figured 0x92 fairly easily. The next document had something else weird and I haven't yet found out what. -- Robin Becker

6 15

Callbacks
by Scott Robertson 02 Aug '99

02 Aug '99

I'm trying to write a product that will use a callback/hook schema. That way a user can specify wether a DTMLMethod or a SQLMEthod should handle a paticular error. So I have an object with a function defined like this. def callback(self): """Call back test""" func = getattr(self, 'ring') return apply(func, (self, globals())) 'ring' is a document method defined in the root folder. It finds this object but when it tries to render 'ring' it can't find standard_html_header and gives me this traceback. Traceback (innermost last): File /home/sroberts/Zope/lib/python/ZPublisher/Publish.py, line 255, in publish_module File /home/sroberts/Zope/lib/python/ZPublisher/Publish.py, line 161, in publish File /home/sroberts/Zope/lib/python/ZPublisher/mapply.py, line 154, in mapply (Object: callback) File /home/sroberts/Zope/lib/python/ZPublisher/Publish.py, line 98, in call_object (Object: callback) File /home/sroberts/Zope/lib/python/Products/Wampum/WampumGenerator.py, line 83, in callback (Object: wamp) File /home/sroberts/Zope/lib/python/OFS/DTMLMethod.py, line 158, in __call__ (Object: ring) File /home/sroberts/Zope/lib/python/OFS/DTMLMethod.py, line 154, in __call__ (Object: ring) File /home/sroberts/Zope/lib/python/DocumentTemplate/DT_String.py, line 514, in __call__ (Object: ring) KeyError: standard_html_header I thought that maybe this was an aquisition problem so I tried using the __of__() call like this: return apply(func.__of__(self), (self, globals())) This gave the same error. Any thoughts? --------------------------------------------------- - Scott Robertson Phone: 714.972.2299 - - CodeIt Computing Fax: 714.972.2399 - - http://codeit.com - ---------------------------------------------------

3 2

Secure Tranactions with Zserver
by zope 01 Aug '99

01 Aug '99

While ZOPE with Apache-SSL is certainly possible , I personally would prefer a more tightly coupled structure than the lightweight server to server protocols provide(such as the certificate if available of the client ) . Tight integration of the SSL-Crypto extention with the zserver would allow security/permission capatibilities to be set on objects based upon a closed verification chain via client certificates (2 two majors support genning them with a simple code fragment. If encryption and X609v3 are available then zope becomes a FAR more interesting possibility for ecommerce. And besides its on the TODO list for the Zserver... Pyhon SSL modules ARE available in source... the question is where and how...(and preferably offshore i.e. NON US developement). cheers A pyhon/Zope novice but a Apache/mod-ssl/php fanatic who wandered here from midgard

2 1

Re: [Zope-dev] CatalogAwareness?
by Kevin Dangoor 01 Aug '99

01 Aug '99

-----Original Message----- From: Michel Pelletier <michel(a)digicool.com> To: David Kankiewicz <kankie(a)thegrid.net> Cc: Zope-Dev(a)zope.org <Zope-Dev(a)zope.org> Date: Friday, July 30, 1999 10:45 PM Subject: Re: [Zope-dev] CatalogAwareness? >If a ZClass subclasses CatalogAware, and there is a 'Catalog' object in >it's acquisition path, they the object will automaticly catalog and >uncatalog itself when it is instanciated/deleted. I'm setting up my own Findable base class (as discussed in previous messages) to handle this. It appears that if you change a property that is specified as meta data in the ZCatalog, you'll need to refresh that entry in the Catalog, right? Does CatalogAware deal with that at all? Does it offer a method to update the object? (Does anything happen automatically if the item is renamed or if properties are changed?) Kevin

2 1

Zope 2.0b1 on Win32 with IE5 - frequent hangs in management screens
by Brad Clements 31 Jul '99

31 Jul '99

Can anyone else recreate this problem on their system? Server/Client : Windows NT 4.0 SP4, IE 5. Server and client running on same machine. Running Zope 2.0b1 binary as shipped just last week. When viewing the management screens, if I don't perform any action for about a minute, then make a selection, IE5 hangs with the spinning globe for a long period of time, up to one minute. Once the request has been answered, I can quickly manipulate the management screens so long as I make future requests within a "short period" of time as the previous request. In other words, if I just keep clicking away -- no problem. Now for something interesting: 1. While IE 5 is "waiting for reply from server", if I make another request to Zope, either from the same machine or another machine, the pending request is immediately answered. Specifically, where I might wait 60 seconds for Zope to reply, I can during that wait make another request from the same machine (different browser) or from another machine and the waiting request will get an immediate reply (and the second request also gets an immediate reply) 2. This "hang" never seems to happen using Netscape 4 as the client. 3. This "hang" doesn't seem to happen if the IE 5 client is running on a different machine than the server. So .. this makes me think that: 1. In the win32 version of Zope 2. When IE5 is used as a local client 3. Zope is getting confused about some IE5 header in conjunction with the request coming from localhost 4. When another request is made, from anywhere, Zope "gets kicked in the ass" and stops blocking the first request.. Any ideas? My NT system has a <winnt>\system32\drivers\etc\hosts In that file is one entry, 127.0.0.1 localhost Also I have a DNS server running on BSD 3 with PTR records for the host system.. Brad Clements, bkc(a)murkworks.com (315)268-1000 http://www.murkworks.com (315)268-9812 Fax netmeeting: ils://ils.murkworks.com ICQ: 14856937

2 1

Re: [Zope-dev] Z Classes and contained objects
by Josh Zeidner 31 Jul '99

31 Jul '99

> > > > Currently, I am working with ZClasses with a "contained" image object. > In > > other words, I created an Image object in the "method" screen. I also > > created an "image" upload view that performs one simple function, >uploads an > > image. > > > >By putting a Zope image object in the ZClass definition, you are >defining a class attribute, NOT an instance attribute. Changing this >object will change the attribute for all instances. > >To instanciate a new image object in your instances, add DTML like: > > I do not necessarily want to be able to add an image to my ZClass Instance. I want one image to be available to each instance of a ZClass, and for that image to be an attribute called medium-pic. From what I gather, I cannot simply add the image through the method tab, but must call the above DTML method to have this image act normally. Keep in mind what I have done does occasionally work, but is inconsistent. >in the ZClass constructor (which is usualy a peer object of the ZClass, >not subordinate). Note that if you add your ZClasses programaticly >(from an external method) and you don't call the constructor, you will >need to simulate what the constructor does. This is an uncommon need, >however. > > > The problem may lie in the way I am uploading this image. Here is the > > line of code that I got from a Zope Doc : > > > > medium_pic.manage_upload(REQUEST['new_pic']) > > > > The symptoms of this bug are either inconsistently broken images when > > viewing the object or distorted images( the image is not retaining its > > aspect ratio ). > > > >Hmmm.. This might be because several threads are trying to access the >same class attribute at once. But I don't really know. Is there a bug report I should put this through? > >-Michel _______________________________________________________________ Get Free Email and Do More On The Web. Visit http://www.msn.com

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RE: [Zope-dev] Strange Characters and Zope
by Paul Everitt 31 Jul '99

31 Jul '99

That utility is called HTML Tidy and is at: http://www.w3.org/People/Raggett/tidy/ >From that page you can also find a link to a Windows GUI version of the command line tool. It's a really neat, useful program for both validation and correction. --Paul > -----Original Message----- > From: Itamar S.-T. [mailto:itamars@ibm.net] > Sent: Saturday, July 31, 1999 4:51 PM > To: Zope-dev > Subject: Re: [Zope-dev] Strange Characters and Zope > > > Robin Becker wrote: > > > > I was demonstrating the implementation in Zope of my Generational > > Accounting web model. The Academic saw how marvellous it > was and wanted > > immediately to change some of the text in the pages. It was > in word so I > > said 'save as html' and then we'll hack it into the database pages. > > Foolish me. Word inserts many strange characters into it's > version of > > HTML. One of them being ? character 0x92. This causes the > page to start > > flinging out save as dialogs. > > > > Can someone enlighten me as to what characters may be safely > > embedded/used in Zope DTML. We figured 0x92 fairly easily. The next > > document had something else weird and I haven't yet found out what. > > There's utility somewhere, IIRC, that fixes all those wierd chars from > Windows in HTML. Try searching through Freshmeat. > > -- > Itamar - itamars(a)ibm.net > ----------------------------o--------------------------------- > -------------o > Sealingwax Greeting Cards | Trust? Ha! The US dollar is > backed by ICBMs! | > http://www.sealingwax.com | --Anonymous Coward, > Slashdot | > > _______________________________________________ > 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-Dev July 1999