update to latest micro, optimize flatten

Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>

codec_test.go

@@ -4,7 +4,7 @@ import (
 	"bytes"
 	"testing"
 
-	"go.unistack.org/micro/v4/codec"
+	"go.unistack.org/micro/v3/codec"
 )
 
 func TestFrame(t *testing.T) {
@@ -28,7 +28,7 @@ func TestFrameFlatten(t *testing.T) {
 		Name: &codec.Frame{Data: []byte("test")},
 	}
 
-	buf, err := NewCodec().Marshal(s)
+	buf, err := NewCodec(codec.Flatten(true)).Marshal(s)
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -36,15 +36,3 @@ func TestFrameFlatten(t *testing.T) {
 		t.Fatalf("bytes not equal %s != %s", buf, `test`)
 	}
 }
-
-func TestReadBody(t *testing.T) {
-	s := &struct {
-		Name string
-	}{}
-	c := NewCodec()
-	b := bytes.NewReader(nil)
-	err := c.ReadBody(b, s)
-	if err != nil {
-		t.Fatal(err)
-	}
-}

go.mod

@@ -1,10 +1,10 @@
-module go.unistack.org/micro-codec-xml/v4
+module go.unistack.org/micro-codec-xml/v3
 
-go 1.19
+go 1.16
 
 require (
-	go.unistack.org/micro-proto/v4 v4.0.0
-	go.unistack.org/micro/v4 v4.0.1
+	github.com/imdario/mergo v0.3.13 // indirect
+	go.unistack.org/micro-proto/v3 v3.4.1
+	go.unistack.org/micro/v3 v3.10.88
+	google.golang.org/protobuf v1.34.2 // indirect
 )
-
-require google.golang.org/protobuf v1.28.1 // indirect

xml.go

@@ -1,13 +1,12 @@
 // Package xml provides a xml codec
-package xml // import "go.unistack.org/micro-codec-xml/v4"
+package xml // import "go.unistack.org/micro-codec-xml/v3"
 
 import (
 	"encoding/xml"
-	"io"
 
-	pb "go.unistack.org/micro-proto/v4/codec"
-	"go.unistack.org/micro/v4/codec"
-	rutil "go.unistack.org/micro/v4/util/reflect"
+	pb "go.unistack.org/micro-proto/v3/codec"
+	"go.unistack.org/micro/v3/codec"
+	rutil "go.unistack.org/micro/v3/util/reflect"
 )
 
 var _ codec.Codec = &xmlCodec{}
@@ -29,8 +28,11 @@ func (c *xmlCodec) Marshal(v interface{}, opts ...codec.Option) ([]byte, error)
 	for _, o := range opts {
 		o(&options)
 	}
-	if nv, nerr := rutil.StructFieldByTag(v, options.TagName, flattenTag); nerr == nil {
-		v = nv
+
+	if options.Flatten {
+		if nv, nerr := rutil.StructFieldByTag(v, options.TagName, flattenTag); nerr == nil {
+			v = nv
+		}
 	}
 
 	switch m := v.(type) {
@@ -53,8 +55,10 @@ func (c *xmlCodec) Unmarshal(b []byte, v interface{}, opts ...codec.Option) erro
 		o(&options)
 	}
 
-	if nv, nerr := rutil.StructFieldByTag(v, options.TagName, flattenTag); nerr == nil {
-		v = nv
+	if options.Flatten {
+		if nv, nerr := rutil.StructFieldByTag(v, options.TagName, flattenTag); nerr == nil {
+			v = nv
+		}
 	}
 
 	switch m := v.(type) {
@@ -69,41 +73,6 @@ func (c *xmlCodec) Unmarshal(b []byte, v interface{}, opts ...codec.Option) erro
 	return xml.Unmarshal(b, v)
 }
 
-func (c *xmlCodec) ReadHeader(conn io.Reader, m *codec.Message, t codec.MessageType) error {
-	return nil
-}
-
-func (c *xmlCodec) ReadBody(conn io.Reader, v interface{}) error {
-	if v == nil {
-		return nil
-	}
-
-	buf, err := io.ReadAll(conn)
-	if err != nil {
-		return err
-	} else if len(buf) == 0 {
-		return nil
-	}
-
-	return c.Unmarshal(buf, v)
-}
-
-func (c *xmlCodec) Write(conn io.Writer, m *codec.Message, v interface{}) error {
-	if v == nil {
-		return nil
-	}
-
-	buf, err := c.Marshal(v)
-	if err != nil {
-		return err
-	} else if len(buf) == 0 {
-		return codec.ErrInvalidMessage
-	}
-
-	_, err = conn.Write(buf)
-	return err
-}
-
 func (c *xmlCodec) String() string {
 	return "xml"
 }