diff --git a/bucket_lifecycle.go b/bucket_lifecycle.go
index 4685a73..f6d5a91 100644
--- a/bucket_lifecycle.go
+++ b/bucket_lifecycle.go
@@ -70,7 +70,7 @@ func (s *BucketService) GetLifecycle(ctx context.Context) (*BucketGetLifecycleRe
 		method:  http.MethodGet,
 		result:  &res,
 	}
-	resp, err := s.client.send(ctx, &sendOpt)
+	resp, err := s.client.doRetry(ctx, &sendOpt)
 	return &res, resp, err
 }
 
@@ -90,7 +90,7 @@ func (s *BucketService) PutLifecycle(ctx context.Context, opt *BucketPutLifecycl
 		method:  http.MethodPut,
 		body:    opt,
 	}
-	resp, err := s.client.send(ctx, &sendOpt)
+	resp, err := s.client.doRetry(ctx, &sendOpt)
 	return resp, err
 }
 
@@ -102,6 +102,6 @@ func (s *BucketService) DeleteLifecycle(ctx context.Context) (*Response, error)
 		uri:     "/?lifecycle",
 		method:  http.MethodDelete,
 	}
-	resp, err := s.client.send(ctx, &sendOpt)
+	resp, err := s.client.doRetry(ctx, &sendOpt)
 	return resp, err
 }
diff --git a/cos.go b/cos.go
index 23bcc33..d36666d 100644
--- a/cos.go
+++ b/cos.go
@@ -22,7 +22,7 @@ import (
 
 const (
 	// Version current go sdk version
-	Version               = "0.7.27"
+	Version               = "0.7.28"
 	userAgent             = "cos-go-sdk-v5/" + Version
 	contentTypeXML        = "application/xml"
 	defaultServiceBaseURL = "http://service.cos.myqcloud.com"
@@ -213,6 +213,11 @@ func (c *Client) newRequest(ctx context.Context, baseURL *url.URL, uri, method s
 }
 
 func (c *Client) doAPI(ctx context.Context, req *http.Request, result interface{}, closeBody bool) (*Response, error) {
+	var cancel context.CancelFunc
+	if closeBody {
+		ctx, cancel = context.WithCancel(ctx)
+		defer cancel()
+	}
 	req = req.WithContext(ctx)
 
 	resp, err := c.client.Do(req)
@@ -290,6 +295,27 @@ type sendOptions struct {
 	disableCloseBody bool
 }
 
+func (c *Client) doRetry(ctx context.Context, opt *sendOptions) (resp *Response, err error) {
+	if opt.body != nil {
+		if _, ok := opt.body.(io.Reader); ok {
+			return c.send(ctx, opt)
+		}
+	}
+	nr := 0
+	for nr < 3 {
+		resp, err = c.send(ctx, opt)
+		if err != nil {
+			if resp != nil && resp.StatusCode <= 499 {
+				break
+			}
+			nr++
+			continue
+		}
+		break
+	}
+	return
+
+}
 func (c *Client) send(ctx context.Context, opt *sendOptions) (resp *Response, err error) {
 	req, err := c.newRequest(ctx, opt.baseURL, opt.uri, opt.method, opt.body, opt.optQuery, opt.optHeader)
 	if err != nil {