Support range requests

[mrdomino]

This would be nice for a stupid project of mine. I bet it'd also make Groovebasin song previews seekable. See also #1499

[rchrd2]

👍 I second this request. Also for an mp3-based app.

Unlike #1499, my app isn't using the special static hosting (though it could if necessary (just have to learn how to use it)).

I wonder if it's really just a matter of passing through the headers to the app, and then it's up to the app to support the range request. If so, then seems like low hanging fruit.

[rchrd2]

@kentonv Is this as simple as passing the headers through and letting the app's http server handle those headers?

[Michael-S]

@rchrd2 the Groove Basin app in Sandstorm for music hosting is really good, and supports mp3s. I've been using it off my personal Sandstorm installation for over a year.

[kentonv]

@rchrd2 Almost. I only want to use the header whitelist for things that are very application-specific. Range requests are a standard part of HTTP, so should be handled by extending the HTTP-over-Cap'n-Proto structures to represent them.

As it happens I actually have a PR open proposing such protocol changes: #2887

But the code hasn't been updated to implement the protocol.