Here a user can directly upload the protofiles by enabling the checkbox for protobuf, and can provide a name for the protofile.

If for Response, Content-Type is set to application/x-protobuf or x-application/protobuf then, only response will be converted into protobuf format. Example -Possible Content-Type header to convert body into protobuf are -Content-Type: application/x-protobufORContent-Type: x-application/protobuf