[Zope] incredible growing urls

[Paul Winkler]

On Wed, May 14, 2003 at 08:55:05PM +0200, Dieter Maurer wrote:
> Avoid non-trivial relative URL references.
> 
>   A trivial URL reference is one not containing a "/". They are harmless.

I'm afraid it's not that simple.
You can see this with the following experiment:
1. Create a folder, "A". Check the "create public interface" option.
2. Go inside A. Create a folder, "B". Check the "create public interface"
option.
3. Edit A/index_html. Add this line at the bottom of the body:


  <a href="B"> make the URL grow! </a>

4. Edit A/B/index_html. Add this line at the bottom of the body:

  <a href="A"> make the URL grow! </a>

We now have created two pages which contain what you call a "trivial URL
reference".

5. Go to folder A and click the "View" tab - to best show what follows,
open it in a new browser window or tab.

6. now click the link repeatedly.

five clicks later, I'm at http://my-zope-site:8080/A/B/A/B/A/B

This can be prevented by replacing the link URLs with absolute
URLs. For flexibility, that's best done by getting the object
and calling its absolute_url method.

In CMF sites, i've found that relative links from one bit of content
to another are not a problem in practice, but relative links 
in the framework (skins) are a big problem and should be avoided.

-- 

Paul Winkler
home:  http://www.slinkp.com
"Muppet Labs, where the future is made - today!"