[Zope] Resolving a url from a path in a virtual host environment

Jonathan dev101 at magma.ca
Thu Oct 19 21:45:27 EDT 2006

----- Original Message ----- 
From: "Pablo Ziliani" <pablo at decode.com.ar>
To: "Zope" <zope at zope.org>
Sent: Thursday, October 19, 2006 8:54 PM
Subject: [Zope] Resolving a url from a path in a virtual host environment

> Hi guys,
> I'm having some trouble tying to get an object from a given path. I'm 
> using virtual hosts, so according to Dieter's great documentation[1], 
> REQUEST.resolve_url should do it. However no matter how creative I get 
> making up urls, I always get a "Different namespace." ValueError.
> Looking at the source of resolve_url[2] I can see that it tries to ensure 
> being at the same namespace (?) seeing if REQUEST.script is at the 
> beginning of the passed url. So the actual problem is that this attribute 
> always returns "" in my (2.9.4-final) Zope instance, 
> quite independently from my requested url.
> So: should I be using some other method instead? (if so, I guess my 
> reference is wrong or outdated). Which one?
> Do I need any special configuration to make REQUEST.script returns my 
> virtual environment?
> Any additional suggestion?
> In case the real url after apache's rewrite is relevant, PATH_INFO and 
> PATH_TRANSLATED are showing something like:
> '/VirtualHostBase/http/www.mydomain.com:80/sites/mysite/VirtualHostRoot/foo/bar.py'

To have a quick look at the urls that are easily available within the 
REQUEST namespace create a dtml method in the 'end' folder that contains:

<dtml-var standard_html_header>
<dtml-var REQUEST>
<dtml-var standard_html_footer>

Then point your browser at this method (eg. 
http://www.mywebsite.com/folderA/folderB/tstmethod) and see what comes up.

Once you have located a variable that gives you what you need, you can 
easily access it via something like:  REQUEST['URL0'] or REQUEST['BASE3']. 
If the path (url) you need is not located within the REQUEST namespace then 
you may need to work-around the problem... one possibility is to create 
property field on the 'top' level folder that contains the base url you 
need.  You can than access this property field to build the required url.



More information about the Zope mailing list