January 2000 - Zope - Zope lists

RE: [Zope] dtml-return question
by David Salgado 17 Jan '00

17 Jan '00

>When I execute the DTMLMethod containing the code above, I get no output >for the dtml-in. However, if I do the following in the method above >(instead of using the allNewsArticles method), I do get output: > ><dtml-in "PARENTS[1].objectValues('NewsArticle')"> > <... do stuff here ...> ></dtml-in> I had a problem which might be similar -- instead of the returned value, my reference to the method was dropping the source-code of the method into the calling script! My problem went away when I wrapped the dtml-in in a dtml-let. i.e. <dtml-let foo=allNewsArticles> <dtml-in foo> <... do stuff here...> </dtml-in> </dtml-let> ...sorted my problem, but YMMV. HTH David

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importing Site Summaries
by Timothy Wilson 17 Jan '00

17 Jan '00

Hi everyone, I've got a problem using Site Summary because of a problem with a URL I'm trying to retrieve, not directly because of the Site Summary product. I'm trying to get some of the news feeds from moreover.com, but their URLs look like: http://h.moreover.com/cgi-local/page?index_techlatest+rss The '?' in the URL really confuses things when I try to update the Site Summary instance using the prescribed method of calling importFromURL like this: http://www.mysite.com/mySummary/importFromURL?url=http://h.moreover.com/cgi… Evan Simpson suggested creating a method in the directory where I keep my Site Summary instances that looks like: <dtml-with moreover.com_techlatest) <dtml-call expr="importFromURL(this(), REQUEST, url='http://h.moreover.com/cgi-local/page?index_techlatest+rss')"> </dtml-with> and then my updating script (using cron) would be: #!/bin/sh lynx -source http://localhost/headlines/grabNews Unfortunately, doing what I just described doesn't work and produces the following traceback: Traceback (innermost last): File /usr/local/src/Zope-2.1.2-src/lib/python/ZPublisher/Publish.py, line 214, in publish_module File /usr/local/src/Zope-2.1.2-src/lib/python/ZPublisher/Publish.py, line 179, in publish File /usr/local/src/Zope-2.1.2-src/lib/python/Zope/__init__.py, line 202, in zpublisher_exception_hook (Object: ElementWithAttributes) File /usr/local/src/Zope-2.1.2-src/lib/python/ZPublisher/Publish.py, line 165, in publish File /usr/local/src/Zope-2.1.2-src/lib/python/ZPublisher/mapply.py, line 160, in mapply (Object: grabNews) File /usr/local/src/Zope-2.1.2-src/lib/python/ZPublisher/Publish.py, line 102, in call_object (Object: grabNews) File /usr/local/src/Zope-2.1.2-src/lib/python/OFS/DTMLMethod.py, line 145, in __call__ (Object: grabNews) File /usr/local/src/Zope-2.1.2-src/lib/python/DocumentTemplate/DT_String.py, line 502, in __call__ (Object: grabNews) File /usr/local/src/Zope-2.1.2-src/lib/python/DocumentTemplate/DT_With.py, line 132, in render (Object: moreover.com_techlatest) KeyError: (see above) Does anyone have any ideas? Perhaps you've gotten this to work with another strategy. Thanks. -Tim -- wilson(a)visi.com <dtml-var pithy_quote>

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New Roles and New ZClasses...
by Darren Boyd 17 Jan '00

17 Jan '00

Hi, I have a Document Repository 'Product' that looks like this: (Made from ZClasses...) DRBase (ZObject, _ZClass_for_CatalogAware, ZObjectManager, _ZClass_for_Folder) DRDoc (ZObject, _ZClass_for_CatalogAware, _ZClass_for_File) The DRBase subobjects include 'file' and 'Document' Note, Document is a DRDoc. - I create a folder called 'test' under the root folder. - In test, I create a Document Repository called docs. - In the folder test, I remove 'acquire permissions' for everything. - In the folder test, I have a user folder (the default acl_users). - In that user folder I create a new role called Project Manager. - I give the Project manager every possible permission. - I create a user (dboyd) in the User Folder, and make dboyd a project manager. I now suspect dboyd should be able to do everything. However, dboyd cannot do the following: - add a new document repository to the folder test. - add a DRDoc to the Document Repository called docs. dboyd can add a file to the Document Repository called docs. Anyone know what I did wrong? Thanks, Darren -- Darren Boyd http://www.dbebiz.com/ .................................................................... Don't worry about people stealing your ideas. If your ideas are any good, you'll have to ram them down people's throats. - Howard Aiken

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Passwd doesn't take
by Xeno Campanoli 17 Jan '00

17 Jan '00

I seem to have zope running on my Debian/Linux workstation as follows: 1 3502 3502 3502 ? -1 S 0 0:00 python /usr/sbin/zope-z2 3502 3503 3502 3502 ? -1 S 33 0:14 /usr/bin/python /usr/sbin/zope-z2 and I get prompted for the password when I give the following URI to netscape: http://localhost:8080/manage but I give my name and password (which I think is correct because after it failed the first time I changed it with:asp:/usr/lib/zope# ./zpasswd.py ~zopepasswdfile Username [superuser]: Xeno Password: Verify password: Please choose a format from: SHA - SHA-1 hashed password CRYPT - UNIX-style crypt password CLEARTEXT - no protection. Encoding [SHA]: Allowed domains [enter=all]: ...and after it rejected the password and I hit cancel, it said: Zope Error Zope has encountered an error while publishing this resource. Unauthorized You are not authorized to access this resource. Troubleshooting Suggestions The URL may be incorrect. The parameters passed to this resource may be incorrect. A resource that this resource relies on may be encountering an error. For more detailed information about the error, please refer to the HTML source for this page. If the error persists please contact the site maintainer. Thank you for your patience. And so I'm stuck. I think I have a valid install, as I went through all the standard dpkg -i install packages to get there, and the thing runs and stayed in memory for about a day now. I'm hoping this is a simple problem with the way I'm setting the password, or the way I'm specifying the URI to netscape. Can somebody make a suggestion or tell me where to read? Thanks.

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how to capture a password
by Cornelis J. de Brabander 17 Jan '00

17 Jan '00

I have a zope powered site that uses basic authentication. In addition to the acl_users folder I have a database with user information, like name data and email address. Within this setup I want to give the user the opportunity to have his/her password sent by email in case (s)he has forgotten. How can I solve this problem within the current setup. I can't find a method that delivers a user's password and I fear it does not exist. Cornelis J. de Brabander

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ZOracleDA
by Nemeth Miklos 17 Jan '00

17 Jan '00

I am stress-testing ZOracleDA, and found it almost perfect for large web applications: it supports multi-threaded access and a kind of connection pooling, and quite reliable. However, there are two points, which makes me a bit anxious: (1) Doug Hellman mentioned that ZOracleDA does not stop long running requests when the user cancels the HTTP request. Is it possible for a malicious cracker to conduct a denial-of-service attack exploiting this behaviour? I think this is not a ZOracleDA specific problem, but a general issue with Oracle. Do other technologies (PHP, mod_perl, etc) have a solution for this problem? Is this a real threat? (2) The ZSQL technology does not use bind variables, instead, literal values are included into the SQL statemets. This may be a big problem for Oracle. Oracle has a very primitive mechanism to determine if an SQL statement be parsed or there is one in its cache: it simply compares the SQL statement strings. If you use bind variables (eg. insert into t(c1,c2) values(:bv1,:bv2)) the SQL statement string is always the same, if you use literals (eg insert into t(c1,c2) values('xxx',512.67)) Oracle is forced to parse all SQL statements. We benchmarked this behaviour and found the 20 - 30 % more Oracle resources are used for this extra parsing. Is there a way to force ZOracleDA to use binding instead of literal substitution? NM

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RE: [Zope] Acquisition on dynamically created objects
by Brian Lloyd 17 Jan '00

17 Jan '00

> I have a class in my zope hierachy which implements an __getitem__ > method and return objects which are created on the fly (or taken from > a volatile (_v_) dictonary). > > What do I have to do if I want those objects to take part in the > acquisition machinery. > > Sascha Hi Sascha - Any time that access to your subobjects is not done through a common getattr(), you need to take an extra step to keep the acquisition chain intact. The Acquisition base classes (such as Acquisition.Implicit) override getattr() handling and automatically handle the wrapping of the resulting object when an attribute is accessed via getattr(). In your case, the resulting object is not being "wrapped" correctly since you are not accessing the object via getattr(). What you need to do is: a. make sure the objects in your _v_ dict are acquirers (i.e. that they have Acquisition.Implicit or another acquisition class as a base class) b. instead of returning the actual object that you get from your _v_ dict, you need to call the __of__ method of that object, passing 'self' as the acquisition 'container'. That will return the object "wrapped" in the context of "self" (the "container"). You will then return the _wrapped_ object from your __getitem__ method. A quick example: class Item(Acquisition.Implicit): # Just a simple item class def __init__(self, id): self.id=id class Container(Acquisition.Implicit): # A simple container. We have an _v_dict dictionary # where we keep some instances of Item. def __init__(self): # heres a dummy attribute that we'll define to # test to make sure our items acquire it... self.foobar='foobar' # create some Item instances in our _v_dict... self._v_dict={} self._v_dict['one']=Item('one') self._v_dict['two']=Item('two') def __getitem__(self, key): # implement getitem, and make sure that the resulting # objects are correctly wrapped by 'self' for acquisition. result=self._v_dict[key] result=result.__of__(self) return result Hope this helps! Brian Lloyd brian(a)digicool.com Software Engineer 540.371.6909 Digital Creations http://www.digicool.com

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dtml-tree and branches
by Anton Gyllenberg 17 Jan '00

17 Jan '00

My namespace gets lost when I try to use the `branches' attribute of the `dtml-tree' tag. Example: <dtml-tree branches=some_method> ... </dtml-tree> `some_method' is a dtml-method with the following template: <dtml-return "objectValues(['Folder', 'DTML Document', 'File'])"> Rendering the dtml-tree results in: Error Type: NameError Error Value: objectValues In this particular case I could use brances_expr="objectValues(['Folder', 'DTML Document', 'File'])", but I plan on augmenting the branch-list with some other objects before returning from `some_method'. `some_method' works fine if I call it using <dtml-var "some_method(_.None, _)">, but apparently this is not the way the method is called by the dtml-tree tag. I also tried <dtml-tree branches_expr="some_method(_.None, _)"> Unfortunately, it seems that the namespace where branches_expr is evaluated doesn't contain the namespace variable `_'. What am I doing wrong? How can I use a DTML-method to calculate the list of branches? By the way, if the branches attribute names a nonexistent method, the tree ends up empty without triggering any errors. I really would expect a name error here. Is this a bug? <dtml-tree branches=no_such_method>...</dtml-tree> -> empty tree. Yes, and I'm using: Zope version: Zope 2.1.2 (source release, python 1.5.2, linux2) Grateful for any help, -- Anton Gyllenberg <anton(a)lifix.fi> +358-50-3412792

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ZServer and virtual hosting via Apache + ActiveImage woes.
by Chris Gazley 17 Jan '00

17 Jan '00

Hi there folks, I'm having a bit of trouble in two areas and was wondering if you might be able to give me a hand. First problem: I go to my zite zite_a.mydomain.com/myusername/ which is a zope zite on port 8080 of a machine running Apahe to take care of the virtual hosting. It lets me through to my zite but it translates the URL to zite_a.mydomain.com:8080/myusername/ and I'd like to get it to show up properly, without the ":8080". I don't know too much about this vhost stuff so let me explain it as my friend did. My hostname is an alias for his machine so when i go to my hostname it passes it along to his machine which then gets Apache to pass it along to my zope zerver on port 8080. That all works just fine...technically. The name just gets screwed up. So what i would like to know is...Is this the properway to get Apache and Zope to do what I want it to do? And if not, how? Second problem: I'm using ActiveImage to make a wee menu on my page. When people enter my site without adding "index_html" to zite_a.mydomain.com/cgazley/ the image for HOME is active(in the pressed state) on every page. I've tried various things in the config for that image and cannot get it to act properly unless the full absolute path with index_html is entered. Whatever shall I do? Thanks in advance, Chris Gazley, GoP

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[Fwd: [Zope] mod_rewrite to a different port?]
by Maarten Slaets 17 Jan '00

17 Jan '00

Maarten Slaets wrote: > > Erick Mechler wrote: > > > > Is it possible to use mod_rewrite and have Zope appear on a different > > port? Here's some more info... > > > > Right now I can go to http://my.domain/cgi-bin/Zope/ and see my site > > through Zope. However, I would like to define a RewriteRule to have > > this > > point to http://my.domain:8080. The reasoning for this is because all > > i think it's like this: > > <VirtualHost localhost:8080> > blah > </VirtualHost> > > localhost should be your web server's ip > > > of > > the images in the Zope site are defined using absolute path names with > > respect to the document root. Therefore, all of the images in the > > http://my.domain/cgi-bin/Zope/ site don't work. > > > > I am not using ZServer, but rather Apache + Zope + SSL. > > > > Any help/links/beatings-because-this-is-a-dumb-question will be much > > appreciated. > > > > Regards, > > Erick Mechler > > > > _______________________________________________ > > Zope maillist - Zope(a)zope.org > > http://lists.zope.org/mailman/listinfo/zope > > ** No cross posts or HTML encoding! ** > > (Related lists - > > http://lists.zope.org/mailman/listinfo/zope-announce > > http://lists.zope.org/mailman/listinfo/zope-dev ) > > -- > Maarten Slaets > Web Developer > KPNQwest Belgium > http://www.fonky.com/vcard/MaartenSlaets/ -- Maarten Slaets Web Developer KPNQwest Belgium http://www.fonky.com/vcard/MaartenSlaets/

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