helloworld.proto

// nodejs
// sudo npm install -g grpc-tools
// grpc_tools_node_protoc --js_out=import_style=commonjs,binary:. --grpc_out=grpc_js:. helloworld.proto

// c++
// protoc -I . --grpc_out=. --plugin=protoc-gen-grpc=grpc_cpp_plugin helloworld.proto
// protoc -I . --cpp_out=. helloworld.proto

syntax = "proto3";

option java_multiple_files = true;
option java_package = "io.grpc.examples.helloworld";
option java_outer_classname = "HelloWorldProto";
option objc_class_prefix = "HLW";

package helloworld;

message HelloRequest {
  string name = 1;
}

message HelloReply {
  string message = 1;
  int32 age = 2;
}

service Greeter {
  rpc SayHello (HelloRequest) returns (HelloReply) {}
}