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I disagree. Caches would have to be intelligent. Remember they already have to pay attention to language headers etc. URLs represent a conceptual resource, rath
by alexchamberlain 14y ago
I disagree. Caches would have to be intelligent. Remember they already have to pay attention to language headers etc. URLs represent a conceptual resource, rather than a single file.
- ars 14y agoCaches (proxies) already exist. You don't have the option of reprogramming them for this new header.
- michaelmior 14y agoPart of the problem here is that there are a wide range of pixel densities. The server could choose to display the same image for some range of values but trying to get a caching proxy to sort this out is highly nontrivial.