Browsers send the full relative path (e.g. 'Screenshots/file.png') as
the multipart filename when uploading folders via webkitRelativePath.
The File entity rejects names containing '/' or '\', causing all files
in a folder upload to fail with 'Invalid file name'.
Three fixes:
- Backend: strip path components from multipart filename in file_handler,
keeping only the basename. Also prevents path-traversal attacks.
- Frontend (fileOperations.js): explicitly pass file.name as the third
argument to FormData.append() in uploadFolderFiles() to override the
browser's relative path.
- Frontend (ui.js): detect folder drops in drag-and-drop handlers by
checking webkitRelativePath, and route them to uploadFolderFiles()
instead of uploadFiles() so subfolders are created first.
Closes#121
Dionisio
a4709426d9