check in this cruft

response.go

@@ -0,0 +1,37 @@
+package grpc
+
+import (
+	"strings"
+
+	"github.com/micro/go-micro/codec"
+	"google.golang.org/grpc"
+)
+
+type response struct {
+	conn *grpc.ClientConn
+	stream grpc.ClientStream
+	codec grpc.Codec
+}
+
+// Read the response
+func (r *response) Codec() codec.Reader {
+	return nil
+}
+
+// read the header
+func (r *response) Header() map[string]string {
+	md, err := r.stream.Header()
+	if err != nil {
+		return map[string]string{}
+	}
+	hdr := make(map[string]string)
+	for k, v := range md {
+		hdr[k] = strings.Join(v, ",")
+	}
+	return hdr
+}
+
+// Read the undecoded response
+func (r *response) Read() ([]byte, error) {
+	return nil, nil
+}