feat: Add support for O_TRUNC and O_APPEND flags

cmd/stfs/cmd/serve_ftp.go

@@ -203,6 +203,7 @@ var serveFTPCmd = &cobra.Command{
 					viper.GetString(cacheWriteFlag),
 				)
 			},
+			true, // FTP needs read permission for `STOR` command even if O_WRONLY is set
 
 			logger.PrintHeader,
 		)

cmd/stfs/cmd/serve_http.go

@@ -125,8 +125,9 @@ var serveHTTPCmd = &cobra.Command{
 				Metadata: metadataPersister,
 			},
 
-			"",  // We never write
-			nil, // We never write
+			"",    // We never write
+			nil,   // We never write
+			false, // We never write
 
 			logger.PrintHeader,
 		)