feat: error response

main.go

@@ -15,15 +15,13 @@ func FileUploadRoute(req *server.Request) *server.Response {
 	log.Println("[MAIN] File Upload request:", req)
 	bytes, err := req.ExtractBytes()
 	if err != nil {
-		log.Fatalln("Failed to extract bytes from payload:", err)
-		return server.NewStatusResponse(server.STATUS_INTERNALERR)
+		return server.NewErrorResponse(err)
 	}
 
 	filename := "received.bin"
 	err = os.WriteFile(filename, bytes, 0644)
 	if err != nil {
-		log.Fatalln("Failed to write packet payload into a file:", err)
-		return server.NewStatusResponse(server.STATUS_INTERNALERR)
+		return server.NewErrorResponse(err)
 	}
 
 	log.Println("Received new request from client:", req.Conn().RemoteAddr().String())

server/response.go

@@ -57,6 +57,18 @@ func NewJsonResponse(data map[string]string) (*Response, error) {
 	}, nil
 }
 
+func NewErrorResponse(err error) *Response {
+	return &Response{
+		StatusCode: STATUS_INTERNALERR,
+		Format: DataFormat{
+			Format:   DF_TEXT,
+			Encoding: E_UTF8,
+		},
+		Headers: map[string]string{},
+		Payload: []byte(err.Error()),
+	}
+}
+
 func (res *Response) ToPacket() *Packet {
 	headers := make(map[string]string)
 

server/router.go

@@ -35,6 +35,7 @@ func (r *Router) Handle(conn net.Conn) error {
 	// TODO: Ability to keep connection alive
 	packet, err := dupl.ReadPacket()
 	if err != nil {
+		dupl.WritePacket(NewErrorResponse(err).ToPacket())
 		return err
 	}
 
@@ -49,4 +50,3 @@ func (r *Router) Handle(conn net.Conn) error {
 	}
 	return errors.New("Not Found")
 }
-