Re: [fetch] Access to the HTTP trailer (#34)

> @mcmanus how would that work? Would I push a same-URL resource as the parent (err?) with > headers at the end? 

one way it could work would be to push "/.well-known/trailers" with a json content-type - (it is scoped to the stream being fetched by virtue of the push promise frame being the same stream id as the object being fetch()d). The PP has to come early but the actual json does not and could be empty or the promise stream even rst if you had nothing to say at the end.
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