[Yum] Base URL handling

[seth vidal]

On Mon, 04 Mar 2013 12:26:58 +0100
Florian Weimer <fweimer at redhat.com> wrote:

> repomd.xml and primary.xml contain relative URLs.  It appears that
> yum even recognizes the xml:base attribute on <location> elements.
> However, the relative URL resolution does not seem to follow RFC
> 3986, Section 5.2 <http://tools.ietf.org/html/rfc3986#section-5.2>.
> For example, I've got a repository which specifies this:
> 
>      <location xml:base="http://download.example.com/root" 
> href="packages/example-0.1-1.x86_64.rpm"/>
> 
> My reading of RFC 3986 suggests that the combined URL should be:
> 
> http://download.example.com/packages/example-0.1-1.x86_64.rpm
> 
> However, the expected URL (from the server directory layout and the
> fact that yum can download the RPM) appears to be:
> 
> http://download.example.com/root/packages/example-0.1-1.x86_64.rpm
> 
> That is, a relative reference does not replace the document part of
> the path (as it does in web browsers).
> 
> Is there a high-level description of how yum combines URLs?  Any 
> suggestions for approximating that?
> 

pretty sure it combines them like this:

base + '/' + href

-sv