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Zope, Threads and Signals
by Wilkinson Charlie E 07 Oct '00

07 Oct '00

It all began when I was a small child, but I'll skip ahead a bit.... Last night I wrote a network client class with plans to use it as an External Method in Zope. Works great from the command line. My first real Python program. Mom and Dad were so proud! However, when I plugged it into Zope and tried to call it from a document method, I got this: Error Type: ValueError Error Value: signal only works in main thread Gack!! Um... Silly me, but I wrote all this code to use sigalarm and blocking I/O. Anyone know how I can overcome this great adversity, aside from rewriting it all to use non-blocking I/O? Know of any good examples of External Method network clients you could point me at? Or would making it a Zope Product somehow fix everything? (Sorry, I had to ask...) -cw- -- Charlie Wilkinson TRIS Development Systems Administrator IS:SD:CT:CC:TD Phone: 202-283-3241 MSMail: Charlie.E.Wilkinson(a)irs.gov SMTP: cwilkins(a)tris.irs.gov Home: cwilkins(a)boinklabs.com This message constructed from 90% post-consumer electrons.

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Can Free Software Manage Your Web Site? <http://www.inside.com/>
by Steven D. Majewski 07 Oct '00

07 Oct '00

Inside magazine <http://www.inside.com/> has a feature on Zope: "Can Free Software Manage Your Web Site?" ---| Steven D. Majewski (804-982-0831) <sdm7g(a)Virginia.EDU> |--- ---| Department of Molecular Physiology and Biological Physics |--- ---| University of Virginia Health Sciences Center |--- ---| P.O. Box 10011 Charlottesville, VA 22906-0011 |--- "All operating systems want to be unix, All programming languages want to be lisp."

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Re: [Zope] Container Class questions
by Dieter Maurer 07 Oct '00

07 Oct '00

geoff(a)northernwastes.org writes: > .... product with associated image .... > Should I create a product that can contain said images? If so, how do > I do this? Should I simply force a naming conventions for the images > and tie them together with the sample catalog items that way? I would use a ZClass to model the product. I would inherid from "Folder". This makes the ZClass folder-like. Especially, I can place images and other related objects inside them (if they do not easily fit in properties). Dieter

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Quotes in DTML (Python) expressions (was: [Zope] HTML-Code in variables (addition)) (was: [Zope] HTML-Code in variables (addition))
by Dieter Maurer 07 Oct '00

07 Oct '00

Lars Heber writes: > <dtml-let text="my html text with a link to <a > href="http://www.yahoo.com">Yahoo!</a>"> <dtml-let text="'my html text with a link to <a href=\x22http://www.yahoo.com\x22>Yahoo!</a>'"> I.e. you use Python's hexadecimal (or octal) quoting for '"' (\x22) inside the Python string. Dieter

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Re: [Zope] Problem with <DTML-CALL>
by Dieter Maurer 07 Oct '00

07 Oct '00

Tim Gildersleeve writes: > The line is > > <dtml-call "REQUEST.set('TOTALDEVIATION',fSTART)"> > Error Type: TypeError > Error Value: number coercion failed I can assure you, that the "number coercion failed" is not raised in the above "REQUEST.set". "set" accepts any type. The problem arises at a later time, probably because "fSTART" or some other computation incredient does not have the correct type. You know about the magic ":type" suffixes in form variables. There is a howto about them at Zope.org. Dieter

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Re: [Zope] LDAP won't work - yes I've applied the patch
by Dieter Maurer 07 Oct '00

07 Oct '00

Roman Milner writes: > I'm trying to get ldap methods to work with 2.2.2. I can access the > attributes of the objects returned from an ldap method with a python > extension fine, but dtml-in'ing the returned list doesn't work. I keep > getting an error (traceback below). > <!-- > Error Type: KeyError The new Zope 2.2 security model hides objects you are not authorized to use. Therefore, you get "KeyError" where you may (or not) expect "Authorization Error". Probably, the LDAP product is not yet adapted for Zope 2.2. Probably, there need to be a "__allow_access_to_unprotected_subobjects__ = 1" somewhere. Maybe, you can contact the author, or try it yourself. There is documentation from Brian decribing what products need to do in order to be compatible with the new Zope 2.2 security policy. Dieter

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Re: [Zope] external method import error (ImportError)...
by Dieter Maurer 07 Oct '00

07 Oct '00

Eric writes: > To summarize: How do I import modules in an External Method's .py file? I remember, I read this in some "External Method" related documentation. You do *NOT* place such modules inside the folder "Extensions" but put them somewhere else reachable by "PYTHONPATH". The documentation suggests that you create a subpackage inside "Shared", say "<myCompany>Extensions", and place there your module (don't forget "__init__.py" in the subfolder representing the subpackage), say "<myModule>". Then, in your external method, you would use: from Shared.<myCompany>Extensions import <myModule> Dieter

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Re: [Zope] client proxy setting
by Dieter Maurer 07 Oct '00

07 Oct '00

TMGB writes: > Can I get the user's client proxy setting using 'REQUEST' or some other > syntax, product, or utility. This is not Proxy Roles or ProxyPass, but > the client's proxy settings if any. I am working on a help page to > debug a user's settings if he or she can't get to certain pages with our > proxy server settings on their browser. I am not sure, I understand what you want to know. I you mean: how is the browser's proxie configuration: manually, direct connection or automatic (with what configuration file). Then, I fear, you will not get this information. If you want to know, which proxie was used for a given request, then there is some chance. Some proxies set the HTTP "VIA" header. Inside Zope, you access it as "HTTP_VIA". It can tell you through which proxies the request was routed. Dieter

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Re: [Zope] Wierd 2.2.2 start up problem
by Dieter Maurer 07 Oct '00

07 Oct '00

J. Atwood writes: > I have installed 2.2.2 on more than a few machines.... on my fifth machine I > got this after doing the install. > > 2000-10-04T19:54:35 ERROR(200) ZODB Couldn't load state for > '\000\000\000\000\000\000\000\003' > Traceback (innermost last): > File /usr/local/Zope-2.2.2-linux2-x86/lib/python/ZODB/Connection.py, line > 446, in setstate > ImportError: No module named Document > > I have tried wiping it away and trying again like three times. Anyone know > what this? Why it is not happening in installs. All RH Linux. On your fifth machine, the ZODB seems to contain an object referencing a module "Document" which apparently is not installed. Activate the logging facility (by starting Zope with "start .... STUPID_LOG_FILE=zope.log ...") and check, whether you see anything suspicious in "zope.log". Dieter

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HTTP user authentication in Python
by Hung Jung Lu 07 Oct '00

07 Oct '00

Hi, Where can I find out more information on HTTP user authentication? I have seen the RFC before, but it's a bit too technical to follow. I think Python does not include the authentication/cookie handling part probably because out of concern about abuses. :) Does anyone know where I can find more info on the authentication and cookie protocol stuff? Is there any Python module already written to handle these things? The idea is to be able to fetch external webpages automatically using Python, including providing the necessary auth and cookie info. Of course this opens up a whole can of security worms, but heck, it's open information and someone must already have written something in Python already. regards, Hung Jung _________________________________________________________________________ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com. Share information about yourself, create your own public profile at http://profiles.msn.com.

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