diff --git a/bindings/alicloud/dingtalk/webhook/webhook.go b/bindings/alicloud/dingtalk/webhook/webhook.go
index e435aa3c16..ad42320481 100644
--- a/bindings/alicloud/dingtalk/webhook/webhook.go
+++ b/bindings/alicloud/dingtalk/webhook/webhook.go
@@ -22,7 +22,6 @@ import (
 	"encoding/json"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"net"
 	"net/http"
 	"net/url"
@@ -54,7 +53,7 @@ type outgoingWebhook struct {
 	handler bindings.Handler
 }
 
-var webhooks = struct { // nolint: gochecknoglobals
+var webhooks = struct { //nolint: gochecknoglobals
 	sync.RWMutex
 	m map[string]*outgoingWebhook
 }{m: make(map[string]*outgoingWebhook)}
@@ -176,6 +175,8 @@ func (t *DingTalkWebhook) sendMessage(ctx context.Context, req *bindings.InvokeR
 		return fmt.Errorf("dingtalk webhook error: post failed. %w", err)
 	}
 	defer func() {
+		// Drain before closing
+		_, _ = io.Copy(io.Discard, resp.Body)
 		_ = resp.Body.Close()
 	}()
 
@@ -183,13 +184,8 @@ func (t *DingTalkWebhook) sendMessage(ctx context.Context, req *bindings.InvokeR
 		return fmt.Errorf("dingtalk webhook error: post failed. status:%d", resp.StatusCode)
 	}
 
-	data, err := ioutil.ReadAll(resp.Body)
-	if err != nil {
-		return fmt.Errorf("dingtalk webhook error: read body failed. %w", err)
-	}
-
 	var rst webhookResult
-	err = json.Unmarshal(data, &rst)
+	err = json.NewDecoder(resp.Body).Decode(&rst)
 	if err != nil {
 		return fmt.Errorf("dingtalk webhook error: unmarshal body failed. %w", err)
 	}
@@ -206,7 +202,7 @@ func getPostURL(urlPath, secret string) (string, error) {
 		return urlPath, nil
 	}
 
-	timestamp := strconv.FormatInt(time.Now().Unix()*1000, 10)
+	timestamp := strconv.FormatInt(time.Now().UnixMilli(), 10)
 	sign, err := sign(secret, timestamp)
 	if err != nil {
 		return urlPath, err
diff --git a/bindings/alicloud/dingtalk/webhook/webhook_test.go b/bindings/alicloud/dingtalk/webhook/webhook_test.go
index 3d0ff85177..24c8ac494a 100644
--- a/bindings/alicloud/dingtalk/webhook/webhook_test.go
+++ b/bindings/alicloud/dingtalk/webhook/webhook_test.go
@@ -60,7 +60,7 @@ func TestPublishMsg(t *testing.T) { //nolint:paralleltest
 	require.NoError(t, err)
 
 	req := &bindings.InvokeRequest{Data: []byte(msg), Operation: bindings.CreateOperation, Metadata: map[string]string{}}
-	_, err = d.Invoke(context.TODO(), req)
+	_, err = d.Invoke(context.Background(), req)
 	require.NoError(t, err)
 }
 
@@ -95,7 +95,7 @@ func TestBindingReadAndInvoke(t *testing.T) { //nolint:paralleltest
 	require.NoError(t, err)
 
 	req := &bindings.InvokeRequest{Data: []byte(msg), Operation: bindings.GetOperation, Metadata: map[string]string{}}
-	_, err = d.Invoke(context.TODO(), req)
+	_, err = d.Invoke(context.Background(), req)
 	require.NoError(t, err)
 
 	select {