echo.proto 253 Bytes EditWeb IDE 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 syntax="proto2"; package example; option cc_generic_services = true; message EchoRequest { required int32 index = 1; }; message EchoResponse { required int32 index = 1; }; service EchoService { rpc Echo(EchoRequest) returns (EchoResponse); };