Re: [1.4] uuid2url and proxy transformers overlapping

[Andreas Hartmann]

Andreas Hartmann schrieb:
> Hi Lenya devs,
> 
> studying the proxy transformer reveals that it handles quite a lot
> of the functionality which the uuid2url transformer already does.
> IMO the proxy transformer is indeed the more appropriate place.
> 
> So IMO we should
> 
>   - move the recently refactored URL building functionality from
>     the uuid2url to the proxy transformer
> 
>   - define a standardized input URL format for the proxy transformer,
>     which serves also as the interface between the uuid2url and
>     proxy transformers
> 
> This way the tranformers wouldn't overlap, but complement each
> other (orthogonal behaviour).
> 
> IIUC the proxy transformer reacts on absolute URLs without the
> context path. Is this sufficient, or should we define a specific
> URL scheme (like lenya-link:/) for more clarity?

The big disadvantage of the absolute URL syntax is that the proxy
transformer can't determine if it already has been applied to a link.
I'm currently doing some testing in Tomcat and up with multiple
context paths in links (/lenya/lenya/lenya/css/menu.css). Maybe
it really makes sense to use a dedicated protocol?

-- Andreas


> 
> 
> Assuming we just use absolute URLs, the sequence would look like this:
> 
>   <a href="lenya-document:{uuid}">
>     |
>     | uuid2url transformer
>     |
>   <a href="/mypub/live/foo">
>     |
>     | proxy transformer
>     |
>   <a href="http://myserver.com/foo"/>
> 
> 
> Or, in the case of a CSS file:
> 
>   div { background: url('<root/>/images/foo.png') }
>     |
>     | XSLT + params
>     |
>   div { background: url('/mypub/live/images/foo.png') }
>     |
>     | Chaperon
>     |
>   <a href="/mypub/live/images/foo.png">
>     |
>     | proxy transformer
>     |
>   <a href="http://myserver.com/images/foo.png"/>
>     |
>     | XSLT
>     |
>   div { background: url('http://myserver.com/images/foo.png') }
> 
> 
> WDYT?
> 
> -- Andreas
> 
> 


-- 
Andreas Hartmann, CTO
BeCompany GmbH
http://www.becompany.ch


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