February 2003 - Zope

CMFVisualEditor
by TANNERT,CARSTEN (HP-Germany,ex1) 24 Feb '03

24 Feb '03

Hi all, I installed the CMFVisualEditor which is much better than the old editor, but I've got a question to you. Does anybody know if it is planned to implement the feature of resizing the whole field of the editor, because it is a little bit small especially when you have long folder names ? Or can you tell me where to find upcoming release information of the CMFVisualEditor ? thx

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Security in External Method - urllib
by Marc Burgauer 24 Feb '03

24 Feb '03

In an external method, I want to perform an HTTP POST to a remote web site, to submit a record to a database. The remote site requires basic HTTP authentication to submit the data, the users database is in synch with my Zope. My external method: def DoHTTPpost (firstname, lastname, email): """ This function performs an HTTP Post and returns the resulting data. No parsing of the data is done. """ import urllib TheURL = 'http://somedomain.com/databasescript' postData = {'Firstname':firstname, 'Lastname':lastname, 'Email':email} codedData = urllib.urlencode(postData) TheCall = urllib.urlopen(TheURL, codedData) return TheCall.read() This works fine if the authentication on the remote site is switched off. How can I supply the current user's name and password in my urlopen call? What's the syntax and how do I get the current users name and password? If this is not possible in an external method, how could it be done? Cheers Marc

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RE: [Zope] Re: Accessing zope through command-line python
by sean.upton＠uniontrib.com 24 Feb '03

24 Feb '03

Yep. Magic. Sets a global security manager on the thread running the Zope app instance we are using. Each thread has a single security manager bound to it at any given point in time. When Zope serves up requests via ZServer, for example, it sets this for that thread every time an HTTP request hits the server: in the web-serving context each hit has a default security manager (or the last instantiated security manager?) set up for it until it is changed to respond to a request. We do the same, but since we are using a single thread without giving it up, we can do this once at the top of the script, and then run stuff requiring a security context which is usually TTW code, but can be some CMF stuff that also assumes a security context. Sean -----Original Message----- From: Paul Winkler [mailto:pw_lists@slinkp.com] Sent: Monday, February 24, 2003 10:54 AM To: zope(a)zope.org Subject: Re: [Zope] Re: Accessing zope through command-line python On Mon, Feb 24, 2003 at 10:37:51AM -0800, sean.upton(a)uniontrib.com wrote: > #============================= > # An example of putting new content into > # a CMF or Plone site in an out-of-process > # Zope instance in a Python module: > #============================= (snip) One question: > newSecurityManager(None,zopeuser) > #new security manager to help invokeFactory run > # also needed to run TTW code (PythonScripts, ZPT, DTML) How's that work? you don't use any return value, and you make no further reference to zopeuser... that's what I dislike about Zope, there's too much code that reads like magical hand-waving :( > I'm working on putting together an out-of-process Zope howto, which I expect > to post in the next week or two on Zope.org, but in the meantime, feel free > to email me with any questions. it's a great recipe, thanks! -- Paul Winkler http://www.slinkp.com _______________________________________________ Zope maillist - Zope(a)zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev )

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Accessing zope through command-line python
by Mark Gibson 24 Feb '03

24 Feb '03

I understand this: ---- import Zope root=Zope.app() #do stuff now. ---- However, if zope is running I receive an error: File "/home/local/zope_2_6/lib/python/ZODB/lock_file.py", line 33, in lock_file raise error, ( ZODB.POSException.StorageSystemError: Could not lock the database file. There must be another process that has opened the file. Is there a way to access a running zope instance in this way? Thanks, Mark

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Re: [Zope] how to remove :8080?
by Einar Næss jensen 24 Feb '03

24 Feb '03

At 11:39 20.02.2003 -0800, you wrote: >If you wish to remove :8080 without using VHM, absolute_url(1) will give >you a relative url (i.e. webpages/index_html instead of >http://localhost.com:8080/webpages/index_html) Just remember to add the >leading slash to make the path absolute. This works, for example, in >generating breadcrumbs and a site map automatically via python scripts. >See page >http://www.zope.org/Documentation/Books/ZopeBook/current/AppendixB.stx >(listed under module ObjectManagerItem) for usage. > >Since absolute_url(1) will not work for search results, you must use the >getpath() method to return relative urls in ZCatalog search results. >See page >http://www.zope.org/Documentation/Books/ZopeBook/current/AppendixB.stx >(listed under module ZCatalog) for usage. Thanks! I got it working with SiteRoot. Well. Almost, anyway. It looks if as some stylesheets for the management-screen is not working quit right . Everything works though, so I can live with that for a while. If anyone knows why using siteroot causes the stylesheet for the managementscreens to disapear, i would be happy to know why! Einar

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RE: [Zope] Re: Accessing zope through command-line python
by sean.upton＠uniontrib.com 24 Feb '03

24 Feb '03

In addition to using ZEO (absolute necessity), here are some other tips for anyone doing out-of-process Zope scripts like this: - Get to know how to deal with transactions in Zope within these out-of-process scripts, because anything you do this way needs to be committed when you are done. Also, using transaction notes to place the undo history in the right place in Zope is a good idea (example below). - To run TTW code objects, you need to be able to: a. Manually create acquisition context for your objects using __of__() b. Create a new SecurityManager using an existing user This is a generic example pieced together from some existing scripts that I have that do this... not entirely tested, but should work: #============================= # An example of putting new content into # a CMF or Plone site in an out-of-process # Zope instance in a Python module: #============================= import Zope from AccessControl.SecurityManagement import newSecurityManager app = Zope.app() CMFSite = app['MyCMFSite'] #Create a security context (to run invokeFactory) # Note: you would also need to do this to run TTW code objects uf = app['acl_users'] zopeuser = uf.getUser('zope').__of__(uf) #user object wrapped in aq context of user folder newSecurityManager(None,zopeuser) #new security manager to help invokeFactory run # also needed to run TTW code (PythonScripts, ZPT, DTML) CMFSite.invokeFactory(id='SomeNewDocument',type_name='Document') obj = CMFSite['SomeNewDocument'] #do stuff to obj to put content in SomeNewDocument... # Run some TTW Python script in a skins folder: skinsfolder = CMFSite['portal_skins']['MySkinsFolder'] scriptobj = skinsfolder['MyScriptName'].__of__(CMFSite) scriptobj('foo') get_transaction().note('/MyCMFSite') #first note, path of object to put undo history on get_transaction().note('Document created and populated with content') #second note, just a description of what was done for the undo tab get_transaction().commit() #==================================== I'm working on putting together an out-of-process Zope howto, which I expect to post in the next week or two on Zope.org, but in the meantime, feel free to email me with any questions. Sean -----Original Message----- From: Maik Jablonski [mailto:maik.jablonski@uni-bielefeld.de] Sent: Monday, February 24, 2003 9:14 AM To: zope(a)zope.org Subject: [Zope] Re: Accessing zope through command-line python Mark Gibson wrote: > I understand this: > > ---- > import Zope > root=Zope.app() > #do stuff now. > > ---- > > However, if zope is running I receive an error: > > > File "/home/local/zope_2_6/lib/python/ZODB/lock_file.py", line 33, in > lock_file > raise error, ( > ZODB.POSException.StorageSystemError: Could not lock the database file. > There must be > another process that has opened the file. > > Is there a way to access a running zope instance in this way? Hi, you must ZEO for this tasks. Please read the Zope-Book => ZEO-Chapter. A nice Howto is: http://www.zope.org/Members/michel/HowTos/ZODB-How-To -mj -- German Zope User Group (DZUG) - http://www.dzug.org/ _______________________________________________ Zope maillist - Zope(a)zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev )

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how do I manage a graceful shutdown?
by Tim Lynch 24 Feb '03

24 Feb '03

I want to do a graceful shutdown with a Product I'm writing. That is, I want to guarantee that some log files include a final message, maybe send an email to a site admin ... those sorts of things. Is there a "hook" that I can include in my product to make sure my shutdown stuff is called whenever Zope is shutting down or restarting? thanks! tim lynch tlynch(a)nal.usda.gov

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RE: [Zope] Re: Java re-invents DTML :-)
by sean.upton＠uniontrib.com 24 Feb '03

24 Feb '03

No. No. No. [banging head against the wall!] This is not an organizational problem. Requiring designers to know how to code functional instead of just presentational aspects. A large online-production organization requires specializations, and this leads to two types of designers or interface developers: 1 => Those with interest in stepping up to learn code - HTML folks learning coding via PHP, CF, ASP etc. - Show desire to use HTML coding as a launch pad to learn new skills programming 2 => Those with interest in refining their creative skills - Creative types, good at integrating multiple media using HTML as a glue-language - Good with HTML, CSS, Visual design, interactivity There is a 3rd class of folks doing templates and HTML documents: 3 => HTML-literate content specialists - Journalists - Online Creative Services writers - Online marketing specialists Of these 3 categories, suggesting an approach of using DTML as a heavier template to prevent stuffing all application functionality into a Python core application only works with the first group. ZPT is the only scalable solution for organizations with all 3 types of people, because it keeps things familiar and what is not familiar (i.e. tal attributes) is pretty unbreakable because it isn't generally touched. Generally speaking though, you want presentation designers to fall into category #2, and your company's staffing process should reflect that in a larger online production organization. I am not talking about people who can only code HTML through Dreamweaver, GoLive, etc... I mean the same thing you mean when talking about HTML people, but I don't expect them to be able to grasp functional development as well as it would/could be done in the logic layer or by developers/coders. The way to support this sort of organizational structure is to keep the presentation as light-weight in functional terms and capabilities as possible. ZPT achieves this, and forces the code to live in the logic layer (i.e. in my Python products and TTW glue scripts, some of which are DTML - but DTML is only used by coders, not HTML people). We use DTML for writing small widgets that are heavy in code but also heavy in presentation (this is similar to what Ausum suggests in his use of "pagelets," I think), but these widgets are written by programmers and not HTML folks. The big thing in a large organization is that you need not have the assumption that all (even really good) HTML people need to know how to code even a bit or logic, and this puts ZPT at the forefront for this use-case. And saying this is not a sign of organizational dysfunction, just staffing specializations needed to scale online production. Also, Terry, I think your message from Friday took my original message out of context. I didn't say that ZPT prevented communication, but that it eliminated the need for constant "get everyone involved" reintegration. You need to understand that this level of relative independence is needed because organizational efficiency is total crap without it. If the development people need to be consulted every time there is a minor look-and-feel redesign, they have no time to develop code or work on new projects. Anything I can do, I will do to keep technical staff from needing to consult designers just to keep things from breaking... Ideally, only when functionality changes with look and feel should the technical staff need to re-integrate the functional machinery into the otherwise visual templates. ZPT accels at this. Sean -----Original Message----- From: Terry Hancock [mailto:hancock@anansispaceworks.com] Sent: Sunday, February 23, 2003 12:47 PM To: zope(a)zope.org Subject: RE: [Zope] Re: Java re-invents DTML :-) On Sunday 23 February 2003 09:00 am, Fernando Martins wrote: > Maik Jablonski wrote: > > Stephan is not the only one... I like ZPT (great concept), but I still > > prefer DTML too... Just another measurement error? ;) > Maybe you don't work with a designer(s) who barely understand html and you > don't need to go back and forth between design and coding? Then, zpt might > not be make a big difference? Some people would consider that an organizational problem. Either pay for training, or get smarter designers. ;-D For my purposes, anyway, a designer who "barely understands HTML" is useless, anyway. As I mentioned, I don't think that form without function is worth pursuing. Anyway, we're more likely to have designers who've never seen a GUI page designer (or have and hate them). You know -- the kind of designers who try to make things look good in Internet Explorer, Mozilla, *and* w3m. [snip rest of comment]

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Simple calculation
by Marc Burgauer 24 Feb '03

24 Feb '03

I am obviously thick. ;-) I want to do a simple calculation in a dtml tag and print the result: <dtml-var expr="85 * HowOften"> HowOften is a value that has been set by an HTML input in a web form. When I run this with a value of 3 for the result is that it prints the character 3 85 times! So it treats it as a string. Obviously I need to convert HowOften to a float, but how do I do it? Cheers Marc

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Re: [Zope] Newbie: dtml-tree
by Ashley Lloyd 24 Feb '03

24 Feb '03

Thanks very much for your reply. I've had a bit of a look around for some examples, and haven't found anything much to help yet, but I'll keep looking. Thanks for the advice. Kind regards Ashley From: Dieter Maurer To: "Ashley Lloyd" CC: zope(a)zope.org Subject: Re: [Zope] Newbie: dtml-tree Date: Fri, 21 Feb 2003 20:24:26 +0100 Ashley Lloyd wrote at 2003-2-21 10:52 +0000: >I am hoping to use dtml-tree to display the results of SQL statements. I >have looked around, and there seems to be quite a bit of information on >dtml-tree, but much of it is out of date, and most only uses it to list >folder contents. Nowadays, I would use the tree support in "ZTUtils". It gives you much better control than "dtml-tree". For examples, look at the ZPT examples. Dieter _______________________________________________ Zope maillist - Zope(a)zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev ) _________________________________________________________________ Worried what your kids see online? Protect them better with MSN 8 http://join.msn.com/?page=features/parental&pgmarket=en-gb&XAPID=186&DI=1059

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