修复了下载工具结束时，删除资源由于句柄未释放导致删除失败

service/client.go

@@ -79,14 +79,13 @@ func (c *ClientService) Download(online *models.Online, uuid string, progress bi
 	downloadFile := filepath.Join(cfg.T.CardDir, fmt.Sprintf("%s.zip", uuid))
 	_, err = os.Stat(downloadFile)
 	if err == nil {
-		os.Remove(downloadFile)
+		os.RemoveAll(downloadFile)
 	}
 
 	file, err := os.Create(downloadFile)
 	if err != nil {
 		return err
 	}
-	defer file.Close()
 
 	r := Rr{
 		file:         file,
@@ -97,6 +96,7 @@ func (c *ClientService) Download(online *models.Online, uuid string, progress bi
 	}
 
 	_, err = io.Copy(&r, resp.Body)
+	file.Close()
 	if err != nil {
 		return err
 	}
@@ -106,7 +106,7 @@ func (c *ClientService) Download(online *models.Online, uuid string, progress bi
 	if err = unzipFile(downloadFile, destDir); err != nil {
 		return err
 	}
-	_ = os.Remove(downloadFile)
+	_ = os.RemoveAll(downloadFile)
 	return nil
 }