playframework/Play20 — pull request #226 by jto (2012-04-09 19:19:34+00:00)
Title: Fix issue #302 (set headers for an async response)

I'm actually not sure it's the best solution, because it's has (side) effects, but I can't see a better one.
Anyway, if you have a better idea, just tell me and reject that one, I'd fix it and make another pull request.