TsgcWebSocketHTTPServer › Events › OnHTTPUploadBeforeSaveFile
Fires before a file extracted from a multipart/form-data upload is saved to disk so the name and path can be customized.
property OnHTTPUploadBeforeSaveFile: TsgcWSHTTPUploadBeforeSaveFileEvent;
// TsgcWSHTTPUploadBeforeSaveFileEvent = procedure(Sender: TObject; var aFileName, aFilePath: string) of object—
When HTTPUploadFiles.StreamType is pstFileStream and HTTPUploadFiles.RemoveBoundaries is True, the server extracts each file from the received multipart/form-data boundaries and saves it to disk automatically. OnHTTPUploadBeforeSaveFile is raised for every file just before it is written, giving the application a chance to override the destination: modify aFileName (defaults to the original client file name) or aFilePath (defaults to HTTPUploadFiles.SaveDirectory) to pick a different target. Use it to sanitize untrusted names, route uploads into per-user folders, or prefix a timestamp to avoid collisions.
procedure OnHTTPUploadBeforeSaveFileEvent(Sender: TObject; var aFileName: string;
var aFilePath: string);
begin
if aFileName = 'test.jpg' then
aFileName := 'custom_test.jpg';
end;