Does gRPC send multiple response message on the same http2 stream ID?

[Yaxiong Zhao]

On https://github.com/grpc/grpc/blob/master/doc/PROTOCOL-HTTP2.md

it was mentioned that response End of stream is marked by:

For responses end-of-stream is indicated by the presence of the END_STREAM flag on the last received HEADERS frame that carries Trailers.

Does gRPC sends multiple such responses on the same HTTP2 stream id?

I was tracing the network traffic, and decode grpc message on the wire.

I thought gRPC never send multiple response on the same stream ID. But found that it indeed do that in some cases.

[Penn (Dapeng) Zhang]

Correct, if it's a server-streaming RPC or bi-directional streaming RPC, the server would send multiple response messages on the same http2 stream. The server will send END_OF_STREAM in the trailers after the last message it would send.

If it is a unary RPC or client-streaming RPC, the server will only send one response message.