change request reader

pkg/request/client.go

@@ -1,7 +1,6 @@
 package request
 
 import (
-	"bytes"
 	"io"
 	"net/http"
 	"net/http/cookiejar"
@@ -92,17 +91,15 @@ func (client *Client) Delete(urlPath string) *Request {
 func (client *Client) execute(r *Request) (res *http.Response, err error) {
 	var (
 		n      int
-		buf    []byte
 		reader io.Reader
 	)
 	if r.contentType == "" && r.body != nil {
 		r.contentType = r.detectContentType(r.body)
 	}
 	if r.body != nil {
-		if buf, err = r.readRequestBody(r.contentType, r.body); err != nil {
+		if reader, err = r.readRequestBody(r.contentType, r.body); err != nil {
 			return
 		}
-		reader = bytes.NewReader(buf)
 	}
 	if r.rawRequest, err = http.NewRequest(r.method, r.uri, reader); err != nil {
 		return

pkg/request/client_test.go

@@ -0,0 +1,14 @@
+package request
+
+import (
+	"bytes"
+	"testing"
+)
+
+func TestClient_execute(t *testing.T) {
+	c := New()
+	buf := []byte("Hello")
+	c.Post("https://ip.nspix.com/geo").
+		SetBody(bytes.NewReader(buf)).
+		Do()
+}

pkg/request/request.go

@@ -1,6 +1,7 @@
 package request
 
 import (
+	"bytes"
 	"context"
 	"encoding/json"
 	"encoding/xml"
@@ -63,16 +64,15 @@ func (r *Request) detectContentType(body interface{}) string {
 	return contentType
 }
 
-func (r *Request) readRequestBody(contentType string, body any) (buf []byte, err error) {
+func (r *Request) readRequestBody(contentType string, body any) (reader io.Reader, err error) {
 	var (
-		ok     bool
-		s      string
-		reader io.Reader
+		ok  bool
+		s   string
+		buf []byte
 	)
 	kind := reflect.Indirect(reflect.ValueOf(body)).Type().Kind()
 	if reader, ok = r.body.(io.Reader); ok {
-		buf, err = io.ReadAll(reader)
-		goto __end
+		return reader, nil
 	}
 	if buf, ok = r.body.([]byte); ok {
 		goto __end
@@ -91,6 +91,11 @@ func (r *Request) readRequestBody(contentType string, body any) (buf []byte, err
 	}
 	err = fmt.Errorf("unmarshal content type %s", contentType)
 __end:
+	if err == nil {
+		if len(buf) > 0 {
+			return bytes.NewReader(buf), nil
+		}
+	}
 	return
 }