I am looking at deploying squid as an HTTP accelerator in front of a site which uses an IP-to-country lookup to vary certain elements of the site's content. Obviously I can't specify this information in the Vary: header; I could have the site emit `Vary: *' but that would guarantee that no useful cacheing is done. Is there a suggested solution to this? One which occurs to me is to modify squid to do the IP-to-country lookup itself, and to add an additional header to the client's request containing the results of the lookup; the application behind the accelerator could then name this header in the Vary: header it returns. I think that would work, but it's a bit ugly; is there a better (or, better still, standard) approach? -- ``Every revolution evaporates and leaves behind only the slime of a new bureaucracy.'' (Kafka)
