Transparent Content Negotiation and Caching

Hi

I use Polipo as a caching proxy in order to be able to access already 
visited web resources even when I have no access to an internet 
connection. As an experiment, I will use Polipo for archival purposes by 
placing its cache in a git repository. Like this I will be able to 
access past versions of resources using a web application of my choice. 
In order to get this working reasonably, good caching of negotiated 
resources is required. Especially, Polipo must be able to choose a 
suitable variant on its own whenever a negotiated resource is requested. 

As I understand it, Polipo caches only one variant for a negotiated 
resource and serves this one based on the Vary, Content-* and Accept-* 
headers. Is this correct?

I'd like to implement Transparent Content Negotiation as described in 
RFC 2295. Is this a good idea? Is anyone else interested in this or has 
anyone already worked on this? I have not yet worked a lot with C, so it 
would take some time for me to try to implement it.

Greetings
Urs


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