CopyFile copies from src to dst until either an error occurs.

CopyFileWatcher is identical to CopyBuffer except that it provided listener (if one is required).

FileNameWithoutExt filename without extension.

GenUniqueFilename filename exists return new name rule custom name rule.

GetFileInfo returns a FileInfo describing the named file.

MoveFile move from src to dst until either an error occurs.

MoveFileWatcher is identical to CopyFileWatcher except that it remove the source file when completes.

ReadFileAt reads bytes from the File starting at byte offset off.

TouchFile touch empty file, p is filepath ignoreExists - if true file exists return nil, otherwise return err createFolder - if true try to create folder.

TransferCompletedEvent transfer completed.

TransferDataEvent transfer data, set ConsumedBytes anmd TotalBytes.

TransferFailedEvent transfer encounters an error.

TransferStartedEvent transfer started, set TotalBytes.