TOnGetFileSizeEvent = procedure (ASender: TIdFTPServerThread; const AFilename: string; var VFileSize: Int64) of object;

File name requested.

Size of the requested file.

Client connection for the event notification.

TOnGetFileSizeEvent is an event type signalled when an FTP server needs to determine the size of a file on the local file system after receiving the FTP SIZE command verb.

TOnGetFileSizeEvent the event type signalled to the TIdFTPServer.OnGetFileSize event handler. The event notification allows the event handler to implement the Operating System and Platform-specific API function calls needed to determine the size of the file specific in AFilename.

An FTP server implementation must assign a procedure to the TOnGetFileSizeEvent event handler to allow responding to the event notification.

Note: The event handler must update the value specified in AFileSize to allow the command event handler for the FTP SIZE command verb to return the value in its response. AFileSize can contain -1 when the size file specified in AFilename cannot be determined, or has been aborted.