Suggestion: Expose outStream in _handleFile to allow manual stream cleanup on request abort #1300
Description
In custom diskStorage implementations using multer, when a client upload request is aborted (e.g. user cancels or network error), developers often want to manually destroy the fs.createWriteStream in req.on('aborted') to ensure the file handle is released.
On Windows, failing to properly close the stream can prevent the file from being deleted due to locked handles.
Currently, outStream is a local variable inside _handleFile and is not accessible from outside, making it impossible to call .end() manually.
Suggestion: Please consider exposing the stream via file.streamOut = outStream, so developers can manually call end() in req.on('aborted') or similar logic. This would greatly improve control in handling incomplete uploads, especially for chunked or large file uploads.