kubernetes/vendor/google.golang.org/grpc/internal/grpcutil/method.go

// ParseMethod splits service and method from the input. It expects format
// "/service/method".
func ParseMethod(methodName string) (service, method string, _ error) { … }

const baseContentType …

// ContentSubtype returns the content-subtype for the given content-type.  The
// given content-type must be a valid content-type that starts with
// "application/grpc". A content-subtype will follow "application/grpc" after a
// "+" or ";". See
// https://github.com/grpc/grpc/blob/master/doc/PROTOCOL-HTTP2.md#requests for
// more details.
//
// If contentType is not a valid content-type for gRPC, the boolean
// will be false, otherwise true. If content-type == "application/grpc",
// "application/grpc+", or "application/grpc;", the boolean will be true,
// but no content-subtype will be returned.
//
// contentType is assumed to be lowercase already.
func ContentSubtype(contentType string) (string, bool) { … }

// ContentType builds full content type with the given sub-type.
//
// contentSubtype is assumed to be lowercase
func ContentType(contentSubtype string) string { … }