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What is the Python script that is similar to a dtml-in call
by Larry McDonnell 01 Jun '04

01 Jun '04

Hi, I need some advice. I still use dtml calls in my systems. My problem is if the user is searching for a record but the record is not found. The call is as follows: <dtml-call "REQUEST.set('serial_number', serial_number)"> <dtml-in lookup_header_record> <dtml-call "REQUEST.set('equip_type', equip_type)"> <dtml-call "REQUEST.set('pr', pr)"> </dtml-in> If the record is not found I get this error: Error Type: KeyError Error Value: equip_type True statement since there is not record and further in the form I am trying to output this variable. Are there any examples that either traps for an error or python script that can also lookup the record and true a found/not found status. Thanks, Larry

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reserved words?
by Mark Barratt 31 May '04

31 May '04

Debugging a dtml page that won't save, found <dtml-if expr="exec=='1'">checked</dtml-if> is the culprit. exec is a Python reserved word, I discover. Can I use it anyway through some kind of escape notation in the expression, or do I have to change the database and all the other scripts I've spent a happy weekend writing? You'll gather I'm not a Python person (yet!), so please don't assume I'll know much background. Many thanks -- Mark Barratt Text Matters Information design: we help explain things using language | design | systems | process improvement ______________________________________________________ phone +44 (0)118 986 8313 email markb(a)textmatters.com web http://www.textmatters.com

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RestrictedPython module problem
by Marcin Dobrzycki 31 May '04

31 May '04

Hi. I try to transfer my application to newer versions of Zope and Plone. I've been using Zope 2.6. (Python 2.1.3), Plone 1.0.?. Now I want to use Zope 2.7, Plone 2.0.?. After dealing with some simple problems I got something I couldnt'n handle. Looks like implementation of RestrictedPython module has changed, the getiter (_getiter_) variable has been used, and I got trouble because of that. Stack trace: --- start ---- ............ ............ --- error message content --- * Expression: standard:'options/slots_mapping|template/prepare_slots|here/prepare_slots|nothing' Names: {'container': <PloneSite instance at 287921a0>, 'context': <Document at /bmpg/ff_home/dg>, 'default': <Products.PageTemplates.TALES.Default instance at 0x279f57ec>, 'here': <Document at /bmpg/ff_home/dg>, 'loop': <SafeMapping instance at 287b81b0>, 'modules': <Products.PageTemplates.ZRPythonExpr._SecureModuleImporter instance at 0x279f52ac>, 'nothing': None, 'options': {'args': ()}, 'repeat': <SafeMapping instance at 287b81b0>, 'request': <HTTPRequest, URL=http://192.168.0.9:8888/bmpg/index_html>, 'root': <Application instance at 28788d10>, 'template': <ZopePageTemplate at /bmpg/document_view used for /bmpg/ff_home/dg>, 'traverse_subpath': [], 'user': Anonymous User} * Module Products.PageTemplates.Expressions, line 201, in __call__ * Module Products.PageTemplates.Expressions, line 196, in _eval * Module Products.PageTemplates.Expressions, line 95, in render * Module Products.PageTemplates.ZRPythonExpr, line 73, in call_with_ns * Module Products.CMFCore.FSPythonScript, line 99, in __render_with_namespace__ * Module Shared.DC.Scripts.Bindings, line 320, in __render_with_namespace__ * Module Shared.DC.Scripts.Bindings, line 343, in _bindAndExec * Module Products.CMFCore.FSPythonScript, line 160, in _exec * Module Script (Python), line 28, in prepare_slots <FSPythonScript at /bmpg/prepare_slots used for /bmpg/document_view> Line 28 NameError: global name '_getiter_' is not defined (Also, an error occurred while attempting to render the standard error message.) --- end ---- There's NO script in my app where I use getiter (or _getiter_) variable. The questin is: Is there anybody who has got the same problem I have ? Thanks for any help (straight answer, suggestions, etc...). P.S. sorry for my english (not a native speaker).

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Zope.org
by Chris Withers 31 May '04

31 May '04

Hi Guys, What can we do about Zope.org? I've heard so much about it's problems but so little seems to happen :-( The site seems to be totally unresponsive a fair bit of the time now, which is pretty appalling in what should be the flagship of a stable and reliable web application server. I know it was a less-than-minor hamper to the bug day on Friday that people often couldn't view or update bugs due to Zope.org taking over a minute to respond to requests, when it responded at all. There's also the fact that it purports to run on a version of Zope with known security issues (2.6.2) For once, I'm trying to approach this with an open mind so just wanted to ask some questions: - What are the problems with Zope.org? Why does is appear to be so unstable and unresponsive? (I could suggest why, but then I accept I have an unpopular opinion at the base of that suggestion ;-) - What do people have to do to help out? I have a perceptionthat there are people who want to help out but that they feel the barrier to entry is too high. (For example, who can actually get in and restart the clients, should they be suffering from memory bloat?) - Where should this be discussed? (zope-web(a)zope.org has been dead for 4-6 months now) I hope the above can at least kick off some discussion but I'd really like to see some solutions. I know Zope.org is a perenial problem, but there's got to be a way we can sort it out... cheers, Chris -- Simplistix - Content Management, Zope & Python Consulting - http://www.simplistix.co.uk

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UserCounter and ASP404
by Brian Sullivan 31 May '04

31 May '04

I am currently using ASP404 (http://zope.org/Members/hiperlogica/ASP404) to front a Zope server with IIS and UserCounter (http://zope.org/Members/SeanT/UserCounter) on the Zope server. It seems the IP addresses reported in UserCounter are all the IP of the IIS server. Is it possible to modify UserCounter or ASP404 to correct this so that the end user IP is listed ? I am suspecting if it is possible that some change in the ASP404 script is required but exactly what and where is not obvious to me. Has anybody encountered and corrected this problem before?

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zope (with cmf) instance being frequently restarted by signal SIGSEGV(11)
by Richard Ettema 31 May '04

31 May '04

Hi, I have a cmf site that has begun restarting frequently and at random intervals for no apparent reason. This first occurred about 2 weeks ago for about 2-3 days with the instance being restarted every 15 mins at worst. This problem disappeared as quickly as it had appeared. 2-3 days ago this same problem reappeared but with the site sometimes being restarted 10 times in a 15 minute period. I can find no sequence of url calls or any common reason for this to be occurring. The only thing I could find was the following entry appearing in the event log matching the times I have witnessed the instance restarting via top. ERROR(200) zdaemon Process 25606 terminated by signal SIGSEGV(11) The only changes that have occurred around the time of this first problem turning up was (other than normal site operation with members/items being add/deleted): -the cpu and memory being upgraded. This was returned to the original memory and cpu state to make sure this wasn't the cause. These have been swapped in/out with no change so it looks like it is just coincidence. -some site zope images were modified to set the 'precondition' attr to call a python script to set response headers for caching of images in apache... This hasn't been undone as the data.fs has since been packed. Is there any way this could be related??? There is no obvious signs of anything malicious going on, but this is always a possibility I guess? What to check for? As this has basically brought the site to its knees with proxy errors displayed more often than not, has anyone got suggestions on what to look for. possibilities (however remote) as I am pretty desperate to get this fixed. If there is a simple explanation, what could cause it to start out of the blue? The only possible answer I have come up with while searching is about the thread stack size being to small. And having to recompile python with this set to a larger figure. Is this related to the problem I am having, and is there an easy way to check if this is the case for the version I have running? If this is what I need to do, is there a good link for details on what needs to be done and how to do it? CMF: 1.4.2 Zope: (unreleased version, python 2.1.3, linux2) Python: 2.1.3 (#1, Sep 7 2002, 15:29:56) [GCC 2.95.4 20011002 (Debian prerelease)] Thank you for all your help on this as I am lost at what steps to take next. Thanks, Richard.

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Override a method of an instance in the ZODB?
by Alec Mitchell 31 May '04

31 May '04

Hello zope gurus, I'm wondering if it is possible to override a method on a single instance of an object in the ZODB. My suspicion is no, but it doesn't hurt to ask. Specifically, I've tried: def userFolderDelUsers(self, names): pass from types import MethodType setattr(acl_users, 'userFolderDelUsers', MethodType(userFolderDelUsers, acl_users, acl_users.__class__)) Which works fine until the transaction gets committed, at which point it fails with "TypeError: can't pickle function objects". Which seems pretty much like a lost cause. Can you only do this at the class level? Is there an unrelated way to accomplish the same goal (overriding a method, without monkeypatching or subclassing)? Thanks for any enlightenment, Alec Mitchell

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calling procedures in external methods.
by Dennis Allison 31 May '04

31 May '04

Probably a stupid question, but .. Suppose I have external methods f(self, x, y z ) and g(self, p, d, q) defined in an external method. When f references g in the external method, does it do so using self.g(p,d,q) or g( self, p, d, q) or does it matter.

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help with __bobo_traverse__
by Mohamed Lrhazi 31 May '04

31 May '04

Newbie here. I am writing a Product called YSPanel. I installed on the root folder. I have a published method called: viewDomain, which simply displays the REQUEST dict for now. I can call it fine through: <http://10.0.10.28:8080/yspanel/viewDomain> Now I'd like the same method to be called to handle a URL like: <http://10.0.10.28:8080/yspanel/foobar/1/2/3/4> So I added this to my class: def __bobo_traverse__(self,REQUEST=None,NAME=None): if NAME == 'foobar': #gettattr_str = str(getattr(self, 'viewDomain')) #self_str = str(self) #err_str = "gettattr_str:%s \n self_str:%s"%(gettattr_str,self_str) #raise 'Ooops', err_str return getattr(self, 'viewDomain') else: # probably from unrestrictedTraverse return getattr(self, NAME) When try it I get: Zope has encountered a problem publishing your object. Cannot locate object at: http://10.0.10.28:8080/yspanel/foobar/1 Note when I uncomment my debugging lines above, I get what seems correct: gettattr_str: <bound method YSPanel.viewDomain of <YSPanel at /yspanel>> self_str: <YSPanel at yspanel> What am I missing here? What is the right way to handle variables passed via PATH_INFO? Thanks a lot. Mohamed~

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Re: [Zope] help with __bobo_traverse__
by Karl Anderson 31 May '04

31 May '04

Mohamed Lrhazi <mohamed(a)your-site.com> writes: > --On Thursday, May 27, 2004 9:15 PM +0100 Matt Hamilton > <matth(a)netsight.co.uk> wrote: > > My initial thought is that maybe there is no context wrapper for > > viewDomain when you return it. I can't remember if it is added > > automaticcally or not. You could try: > > > > return getattr(self, 'viewDomain').__of__(self) > > > > and see if that works. > > > > I will try that.... > > > Having said that, taking another look at your code, I think it works as > > expected. The first call to __bobo_traverse__ gets 'foobar', but how > > does foobar get '1'? Does an object called '1' exist anywhere? > > I said I was a newbie, didn't I? :) > > In <http://10.0.10.28:8080/yspanel/foobar/1/2/3/4> > > There is no object "foobar" nor "1" nor "2" .... > > > yspanel is an instance of My product though. and I am trying to figure out > how to use __bobo_traverse__ to call a method to handle the above request, > where everything, from foobar and on, is parameters or commands... I do this in two toy products, BlogFace and BlogTopic. http://zope.org/Members/karl/index_html/BlogFace/BlogFace http://zope.org/Members/karl/index_html/BlogTopic/BlogTopic BlogFace uses __bobo_traverse__. If name actually exists, return it for publishing. If name is an int, add something to the REQUEST and return self. If name is in a parameter dict, add something to REQUEST and return self. If no actual subobjects get in the way, we end up at self's index_html, which does something with these stored agruments. def __bobo_traverse__(self, REQUEST, name): """ Consume trailing URL path and turn into arguments so long as they are convertable to ints. Otherwise, traverse normally with collected arguments. Note that this shadows subobjects with IDs that are convertable to ints. """ if re.match('^[0-9]+$', name): if not REQUEST.has_key('traverse_date'): REQUEST['traverse_date'] = [] (REQUEST['traverse_date']).append(name) elif name in self.traverseParamOpts.keys(): if not REQUEST.has_key('traverse_params'): REQUEST['traverse_params'] = [] (REQUEST['traverse_params']).append(name) else: # normal traverse. This can raise an AttributeError. What can # we raise to get the publisher to do what it does in other # cases, besides making and raising a notFoundError ourselves? return getattr(self, name) return self BlogTopic does this more efficiently by munging the traversal stack in __before_publishing_traverse__, so that all of those traversal calls are short-circuited. # should be using the tools in BeforeTraverse.py? def __before_publishing_traverse__(self, obj, req): """ If the traversal stack is all intable strings that don't lead to attrs or items, put the date represented in the request and lop the stack, causing the publisher to call us for the next publishing step. """ stack = req['TraversalRequestNameStack'] # do nothing unless we have only intable strs to traverse overall # XXX use something faster than re.match(str)? if stack and (len(filter(lambda x: re.match('^[0-9]+$', x), stack)) != len(stack)): return # Do nothing if there's an attr or item to publish, allows # things like custom views for dates. # This isn't rigorous, there could still be something to publish, # but there isn't a mechanism to find any name that # BaseRequest.traverse would publish, other than copying the code. stack.reverse() if stack: self_base = aq_base(self) if hasattr(self_base, stack[0]): return try: dummy = self_base[stack[0]] return except: pass # stop looking for next obj to publish by emptying stack req['TraversalRequestNameStack'] = [] try: req['BlogTopicDate'] = seqToDate(stack) except: req['TraversalRequestNameStack'] = [self.dateErrorSkin] Munging the traversal stack can have weird consequences for things like breadcrumbs. -- Karl Anderson kra(a)monkey.org http://monkey.org/~kra/

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