notifications: GetObjectInfo() later if bucket notifications are set. (#2575)

cmd/bucket-handlers.go

@@ -360,10 +360,13 @@ func (api objectAPIHandlers) PostPolicyBucketHandler(w http.ResponseWriter, r *h
 		ETag:     md5Sum,
 	})
 
+	// Set common headers.
 	setCommonHeaders(w)
 
+	// Write successful response.
 	writeSuccessResponse(w, encodedSuccessResponse)
 
+	if eventN.IsBucketNotificationSet(bucket) {
 		// Fetch object info for notifications.
 		objInfo, err := api.ObjectAPI.GetObjectInfo(bucket, object)
 		if err != nil {
@@ -371,7 +374,6 @@ func (api objectAPIHandlers) PostPolicyBucketHandler(w http.ResponseWriter, r *h
 			return
 		}
 
-	if eventN.IsBucketNotificationSet(bucket) {
 		// Notify object created event.
 		eventNotify(eventData{
 			Type:    ObjectCreatedPost,

cmd/object-handlers.go

@@ -454,6 +454,7 @@ func (api objectAPIHandlers) PutObjectHandler(w http.ResponseWriter, r *http.Req
 	}
 	writeSuccessResponse(w, nil)
 
+	if eventN.IsBucketNotificationSet(bucket) {
 		// Fetch object info for notifications.
 		objInfo, err := api.ObjectAPI.GetObjectInfo(bucket, object)
 		if err != nil {
@@ -461,7 +462,6 @@ func (api objectAPIHandlers) PutObjectHandler(w http.ResponseWriter, r *http.Req
 			return
 		}
 
-	if eventN.IsBucketNotificationSet(bucket) {
 		// Notify object created event.
 		eventNotify(eventData{
 			Type:    ObjectCreatedPut,
@@ -795,6 +795,7 @@ func (api objectAPIHandlers) CompleteMultipartUploadHandler(w http.ResponseWrite
 	w.Write(encodedSuccessResponse)
 	w.(http.Flusher).Flush()
 
+	if eventN.IsBucketNotificationSet(bucket) {
 		// Fetch object info for notifications.
 		objInfo, err := api.ObjectAPI.GetObjectInfo(bucket, object)
 		if err != nil {
@@ -802,7 +803,6 @@ func (api objectAPIHandlers) CompleteMultipartUploadHandler(w http.ResponseWrite
 			return
 		}
 
-	if eventN.IsBucketNotificationSet(bucket) {
 		// Notify object created event.
 		eventNotify(eventData{
 			Type:    ObjectCreatedCompleteMultipartUpload,