diff --git a/_example/object/append.go b/_example/object/append.go
index da28825..fbcb516 100644
--- a/_example/object/append.go
+++ b/_example/object/append.go
@@ -57,13 +57,16 @@ func main() {
 		panic(err)
 		return
 	}
+	defer resp.Body.Close()
 	fmt.Printf("%s\n", resp.Status)
 
 	// head
-	if _, err = c.Object.Head(ctx, name, nil); err != nil {
+	resp, err = c.Object.Head(ctx, name, nil)
+	if err != nil {
 		panic(err)
 		return
 	}
+	defer resp.Body.Close()
 
 	// 再次 append
 	data = genBigData(1024 * 1024 * 5)
@@ -72,5 +75,6 @@ func main() {
 	if err != nil {
 		panic(err)
 	}
+	defer resp.Body.Close()
 	fmt.Printf("%s\n", resp.Status)
 }
diff --git a/_example/object/completeMultipartUpload.go b/_example/object/completeMultipartUpload.go
index cde82a2..05fe23f 100644
--- a/_example/object/completeMultipartUpload.go
+++ b/_example/object/completeMultipartUpload.go
@@ -35,6 +35,8 @@ func uploadPart(c *cos.Client, name string, uploadID string, blockSize, n int) s
 	resp, err := c.Object.UploadPart(
 		context.Background(), name, uploadID, n, f, nil,
 	)
+	defer resp.Body.Close()
+
 	if err != nil {
 		panic(err)
 	}
diff --git a/_example/object/copy.go b/_example/object/copy.go
index 310398e..123c9f1 100644
--- a/_example/object/copy.go
+++ b/_example/object/copy.go
@@ -36,10 +36,11 @@ func main() {
 	expected := "test"
 	f := strings.NewReader(expected)
 
-	_, err := c.Object.Put(context.Background(), source, f, nil)
+	resp, err := c.Object.Put(context.Background(), source, f, nil)
 	if err != nil {
 		panic(err)
 	}
+	defer resp.Body.Close()
 
 	soruceURL := fmt.Sprintf("%s/%s", u.Host, source)
 	dest := fmt.Sprintf("test/objectMove_%d.go", time.Now().Nanosecond())
@@ -50,7 +51,7 @@ func main() {
 	}
 	fmt.Printf("%+v\n\n", res)
 
-	resp, err := c.Object.Get(context.Background(), dest, nil)
+	resp, err = c.Object.Get(context.Background(), dest, nil)
 	if err != nil {
 		panic(err)
 	}
diff --git a/_example/object/delete.go b/_example/object/delete.go
index d3c4a06..a5278a2 100644
--- a/_example/object/delete.go
+++ b/_example/object/delete.go
@@ -29,8 +29,9 @@ func main() {
 
 	name := "test/objectPut.go"
 
-	_, err := c.Object.Delete(context.Background(), name)
+	resp, err := c.Object.Delete(context.Background(), name)
 	if err != nil {
 		panic(err)
 	}
+	defer resp.Body.Close()
 }
diff --git a/_example/object/head.go b/_example/object/head.go
index 2e13850..c396f3b 100644
--- a/_example/object/head.go
+++ b/_example/object/head.go
@@ -29,8 +29,9 @@ func main() {
 	})
 
 	name := "test/hello.txt"
-	_, err := c.Object.Head(context.Background(), name, nil)
+	resp, err := c.Object.Head(context.Background(), name, nil)
 	if err != nil {
 		panic(err)
 	}
+	defer resp.Body.Close()
 }
diff --git a/_example/object/listParts.go b/_example/object/listParts.go
index 9adfc29..614be0b 100644
--- a/_example/object/listParts.go
+++ b/_example/object/listParts.go
@@ -38,6 +38,7 @@ func uploadPart(c *cos.Client, name string, uploadID string, blockSize, n int) s
 	if err != nil {
 		panic(err)
 	}
+	defer resp.Body.Close()
 	fmt.Printf("%s\n", resp.Status)
 	return resp.Header.Get("Etag")
 }
diff --git a/_example/object/options.go b/_example/object/options.go
index 334cbfc..e2c24e8 100644
--- a/_example/object/options.go
+++ b/_example/object/options.go
@@ -29,11 +29,12 @@ func main() {
 
 	name := "test/hello.txt"
 	opt := &cos.ObjectOptionsOptions{
-		Origin: "http://www.qq.com",
+		Origin:                     "http://www.qq.com",
 		AccessControlRequestMethod: "PUT",
 	}
-	_, err := c.Object.Options(context.Background(), name, opt)
+	resp, err := c.Object.Options(context.Background(), name, opt)
 	if err != nil {
 		panic(err)
 	}
+	defer resp.Body.Close()
 }
diff --git a/_example/object/put.go b/_example/object/put.go
index 678b718..0ee3249 100644
--- a/_example/object/put.go
+++ b/_example/object/put.go
@@ -29,10 +29,11 @@ func main() {
 	name := "test/objectPut.go"
 	f := strings.NewReader("test")
 
-	_, err := c.Object.Put(context.Background(), name, f, nil)
+	resp, err := c.Object.Put(context.Background(), name, f, nil)
 	if err != nil {
 		panic(err)
 	}
+	defer resp.Body.Close()
 
 	// 测试上传以及特殊字符
 	name = "test/put_ + !'()* option.go"
diff --git a/_example/object/putACL.go b/_example/object/putACL.go
index e3dec94..5dd467e 100644
--- a/_example/object/putACL.go
+++ b/_example/object/putACL.go
@@ -33,10 +33,11 @@ func main() {
 		},
 	}
 	name := "test/hello.txt"
-	_, err := c.Object.PutACL(context.Background(), name, opt)
+	resp, err := c.Object.PutACL(context.Background(), name, opt)
 	if err != nil {
 		panic(err)
 	}
+	defer resp.Body.Close()
 
 	// with body
 	opt = &cos.ObjectPutACLOptions{
@@ -57,8 +58,9 @@ func main() {
 		},
 	}
 
-	_, err = c.Object.PutACL(context.Background(), name, opt)
+	resp, err = c.Object.PutACL(context.Background(), name, opt)
 	if err != nil {
 		panic(err)
 	}
+	defer resp.Body.Close()
 }
diff --git a/_example/object/putWithPresignedURL.go b/_example/object/putWithPresignedURL.go
index c701224..1841c88 100644
--- a/_example/object/putWithPresignedURL.go
+++ b/_example/object/putWithPresignedURL.go
@@ -39,10 +39,11 @@ func main() {
 	f := strings.NewReader("test")
 
 	// 通过生成签名 header 上传文件
-	_, err := c.Object.Put(ctx, name, f, nil)
+	resp, err := c.Object.Put(ctx, name, f, nil)
 	if err != nil {
 		panic(err)
 	}
+	defer resp.Body.Close()
 
 	// 获取预签名授权 URL
 	opt := &cos.ObjectPutOptions{
diff --git a/_example/object/uploadFile.go b/_example/object/uploadFile.go
index de9684f..89d8641 100644
--- a/_example/object/uploadFile.go
+++ b/_example/object/uploadFile.go
@@ -36,8 +36,9 @@ func main() {
 	}
 	fmt.Println(s.Size())
 
-	_, err = c.Object.Put(context.Background(), name, f, nil)
+	resp, err = c.Object.Put(context.Background(), name, f, nil)
 	if err != nil {
 		panic(err)
 	}
+	defer resp.Body.Close()
 }
diff --git a/_example/object/uploadPart.go b/_example/object/uploadPart.go
index d44a2db..d10d7f1 100644
--- a/_example/object/uploadPart.go
+++ b/_example/object/uploadPart.go
@@ -44,10 +44,11 @@ func main() {
 	uploadID := up.UploadID
 
 	f := strings.NewReader("test heoo")
-	_, err := c.Object.UploadPart(
+	resp, err := c.Object.UploadPart(
 		context.Background(), name, uploadID, 1, f, nil,
 	)
 	if err != nil {
 		panic(err)
 	}
+	defer resp.Body.Close()
 }
diff --git a/codelingo.yaml b/codelingo.yaml
index 656cfad..555c207 100644
--- a/codelingo.yaml
+++ b/codelingo.yaml
@@ -1,3 +1,4 @@
 tenets:
 - import: codelingo/effective-go
 - import: codelingo/code-review-comments
+- import: codelingo/mozillazg-go-cos
diff --git a/object_test.go b/object_test.go
index 767a101..0c27f9c 100644
--- a/object_test.go
+++ b/object_test.go
@@ -39,6 +39,7 @@ func TestObjectService_Get(t *testing.T) {
 	if err != nil {
 		t.Fatalf("Object.Get returned error: %v", err)
 	}
+	defer resp.Body.Close()
 
 	b, _ := ioutil.ReadAll(resp.Body)
 	ref := string(b)
@@ -76,6 +77,7 @@ func TestObjectService_Get_with_PresignedURL(t *testing.T) {
 	if err != nil {
 		t.Fatalf("Object.Get returned error: %v", err)
 	}
+	defer resp.Body.Close()
 
 	b, _ := ioutil.ReadAll(resp.Body)
 	ref := string(b)
@@ -114,10 +116,11 @@ func TestObjectService_Put(t *testing.T) {
 	})
 
 	r := bytes.NewReader([]byte("hello"))
-	_, err := client.Object.Put(context.Background(), name, r, opt)
+	resp, err := client.Object.Put(context.Background(), name, r, opt)
 	if err != nil {
 		t.Fatalf("Object.Put returned error: %v", err)
 	}
+	defer resp.Body.Close()
 
 }
 
@@ -153,10 +156,11 @@ func TestObjectService_Put_with_PresignedURL(t *testing.T) {
 	})
 
 	r := bytes.NewReader([]byte("hello"))
-	_, err := client.Object.Put(context.Background(), name, r, opt)
+	resp, err := client.Object.Put(context.Background(), name, r, opt)
 	if err != nil {
 		t.Fatalf("Object.Put returned error: %v", err)
 	}
+	defer resp.Body.Close()
 
 }
 
@@ -192,10 +196,12 @@ func TestObjectService_Put_not_close(t *testing.T) {
 	})
 
 	r := newTraceCloser(bytes.NewReader([]byte("hello")))
-	_, err := client.Object.Put(context.Background(), name, r, opt)
+	resp, err := client.Object.Put(context.Background(), name, r, opt)
 	if err != nil {
 		t.Fatalf("Object.Put returned error: %v", err)
 	}
+	defer resp.Body.Close()
+
 	if r.Called {
 		t.Fatal("Should not close input")
 	}
@@ -212,10 +218,11 @@ func TestObjectService_Delete(t *testing.T) {
 		w.WriteHeader(http.StatusNoContent)
 	})
 
-	_, err := client.Object.Delete(context.Background(), name)
+	resp, err := client.Object.Delete(context.Background(), name)
 	if err != nil {
 		t.Fatalf("Object.Delete returned error: %v", err)
 	}
+	defer resp.Body.Close()
 }
 
 func TestObjectService_Head(t *testing.T) {
@@ -232,10 +239,11 @@ func TestObjectService_Head(t *testing.T) {
 		IfModifiedSince: "Mon, 12 Jun 2017 05:36:19 GMT",
 	}
 
-	_, err := client.Object.Head(context.Background(), name, opt)
+	resp, err := client.Object.Head(context.Background(), name, opt)
 	if err != nil {
 		t.Fatalf("Object.Head returned error: %v", err)
 	}
+	defer resp.Body.Close()
 
 }
 
@@ -251,14 +259,15 @@ func TestObjectService_Options(t *testing.T) {
 	})
 
 	opt := &ObjectOptionsOptions{
-		Origin: "www.qq.com",
+		Origin:                     "www.qq.com",
 		AccessControlRequestMethod: "PUT",
 	}
 
-	_, err := client.Object.Options(context.Background(), name, opt)
+	resp, err := client.Object.Options(context.Background(), name, opt)
 	if err != nil {
 		t.Fatalf("Object.Options returned error: %v", err)
 	}
+	defer resp.Body.Close()
 
 }
 
@@ -297,10 +306,11 @@ func TestObjectService_Append(t *testing.T) {
 	})
 
 	r := bytes.NewReader([]byte("hello"))
-	_, err := client.Object.Append(context.Background(), name, position, r, opt)
+	resp, err := client.Object.Append(context.Background(), name, position, r, opt)
 	if err != nil {
 		t.Fatalf("Object.Append returned error: %v", err)
 	}
+	defer resp.Body.Close()
 }
 
 func TestObjectService_Append_not_close(t *testing.T) {
@@ -342,10 +352,12 @@ func TestObjectService_Append_not_close(t *testing.T) {
 	})
 
 	r := newTraceCloser(bytes.NewReader([]byte("hello")))
-	_, err := client.Object.Append(context.Background(), name, position, r, opt)
+	resp, err := client.Object.Append(context.Background(), name, position, r, opt)
 	if err != nil {
 		t.Fatalf("Object.Append returned error: %v", err)
 	}
+	defer resp.Body.Close()
+
 	if r.Called {
 		t.Fatal("Should not close input")
 	}