diff --git a/transport/http/codec.go b/transport/http/codec.go
index da1b13e062a..156181f77ff 100644
--- a/transport/http/codec.go
+++ b/transport/http/codec.go
@@ -1,8 +1,10 @@
 package http
 
 import (
+	"bytes"
 	"fmt"
 	"io"
+	"io/ioutil"
 	"net/http"
 	"net/url"
 
@@ -63,6 +65,10 @@ func DefaultRequestDecoder(r *http.Request, v interface{}) error {
 		return errors.BadRequest("CODEC", fmt.Sprintf("unregister Content-Type: %s", r.Header.Get("Content-Type")))
 	}
 	data, err := io.ReadAll(r.Body)
+
+	// reset body.
+	r.Body = ioutil.NopCloser(bytes.NewBuffer(data))
+
 	if err != nil {
 		return errors.BadRequest("CODEC", err.Error())
 	}
diff --git a/transport/http/codec_test.go b/transport/http/codec_test.go
index 562f55decf5..b701b70fc0a 100644
--- a/transport/http/codec_test.go
+++ b/transport/http/codec_test.go
@@ -11,9 +11,11 @@ import (
 )
 
 func TestDefaultRequestDecoder(t *testing.T) {
+	bodyString := "{\"a\":\"1\", \"b\": 2}"
+
 	req1 := &nethttp.Request{
 		Header: make(nethttp.Header),
-		Body:   io.NopCloser(bytes.NewBufferString("{\"a\":\"1\", \"b\": 2}")),
+		Body:   io.NopCloser(bytes.NewBufferString(bodyString)),
 	}
 	req1.Header.Set("Content-Type", "application/json")
 
@@ -31,6 +33,14 @@ func TestDefaultRequestDecoder(t *testing.T) {
 	if !reflect.DeepEqual(int64(2), v1.B) {
 		t.Errorf("expected %v, got %v", 2, v1.B)
 	}
+
+	data, err := io.ReadAll(req1.Body)
+	if err != nil {
+		t.Errorf("expected no error, got %v", err1)
+	}
+	if !reflect.DeepEqual([]byte(bodyString), data) {
+		t.Errorf("expected %v, got %v", bodyString, data)
+	}
 }
 
 type mockResponseWriter struct {