Re: ID for Immutable

[Alex Rousskov <[e-mail]>]

On 10/28/2016 08:44 AM, Kari Hurtta wrote:
> If server can't calculate hash-function over resource,
> is is really static non-caching resource?

There is sometimes a big difference between the _ability_ to calculate a
hash and the _expense_ of doing so. AFAICT, immutable responses may
still be dynamically generated (or otherwise costly to produce) on the
origin server.

For example, loading, encoding, and hashing a 2-hour video of the 1948
Olympics opening ceremony could be rather expensive, but will produce
the same immutable result [until the server has to inject a fresh set of
advertisements sometime tomorrow].

Alex.