Raw Encoded Buffers (Partial Decoding)

By default a request message is protobuf-encoded before it is sent and the response is decoded before it is returned. Either side can instead be left as a raw, already-encoded protobuf payload — a Vector{UInt8} holding just the message body, with the 5-byte gRPC framing still added and stripped for you. This is useful for forwarding bytes you already hold, or for partially decoding a large response and reading only the fields you need.

On the request side, pass a Vector{UInt8} in place of the typed message, whether as the call argument or to put!:

using ProtoBufchan = gRPCChannel("localhost", 8001)io = IOBuffer(); encode(ProtoEncoder(io), TestRequest(10, UInt64[]))raw_request = take!(io)response = TestService.TestRPC(chan, raw_request)   # typed response

On the response side, request raw bytes by passing Vector{UInt8} as an extra argument to the call, or to fetch / take!:

# Unary: receive the response undecodedraw = TestService.TestRPC(chan, TestRequest(10, UInt64[]), Vector{UInt8})response = decode(ProtoDecoder(IOBuffer(raw)), TestResponse)# Server streaming: take each response as raw bytes (this request asks for 10)rpc = TestService.TestServerStreamRPC(chan, TestRequest(10, UInt64[]))for _ in 1:10    raw = take!(rpc, Vector{UInt8})    # decode(ProtoDecoder(IOBuffer(raw)), TestResponse)end

The two sides are independent, so either or both may be raw. The same mechanism is covered in more depth for the legacy API.