图片凭证修改

@@ -83,6 +83,10 @@ func CreateUploadImage(client *vod.Client, r *CreateUploadImageRequest) (respons
 	request := vod.CreateCreateUploadImageRequest()
 	request.ImageType = "default"
 	request.Title = r.Title
+	if filepath.Ext(r.FileName) == "" {
+		err = fmt.Errorf("filename:%v invalid", r.FileName)
+		return
+	}
 	request.ImageExt = filepath.Ext(r.FileName)[1:]
 	request.AcceptFormat = "JSON"
 	//request.StorageLocation = filepath.Base(request.Title)