feat: implement codec

response.go

@@ -0,0 +1,18 @@
+package krpc
+
+import (
+	"fmt"
+	"sync"
+
+	"krwu.top/krpc.v1/codec"
+)
+
+func (s *Server) sendResponse(cc codec.Codec, h *codec.Header, body interface{}, sending *sync.Mutex) {
+	sending.Lock()
+	defer sending.Unlock()
+
+	if err := cc.Write(h, body); err != nil {
+		fmt.Println("rpc server: write response error: ", err)
+	}
+
+}