Setting gRPC status in http response

[wagenet]

Is this possible? It looks like the underlying interface may support it, but it doesn’t seem to be public.

[juanmolle]

Do we need to expose? maybe instead of return -1 https://github.com/proxy-wasm/proxy-wasm-rust-sdk/blob/master/src/hostcalls.rs#L721 we can map http code to the closest grpc code

[juanmolle]

@PiotrSikora let us know what you think about this please

[PiotrSikora]

This should be fixed in #248.

Note that Envoy doesn't support sending gRPC messages using sendLocalReply() calls, and it automatically changes HTTP responses to gRPC errors when talking with gRPC clients, so this is limited to emitting gRPC error responses, and not for producing valid gRPC responses.