GET requests from the clients
For HTTP GET requests from the client, the path on the disk is constructed from the base URL. Origin Server doesn't allow to access the folder while serving an HTTP GET request from the client.
PUT request from the packager
Packager uses HTTP PUT to publish the content to Origin Server. The file location in the disk is decided by the base URL. Origin Server serves only the files corresponding to successful PUT requests. Origin Server allows a PUT request over a successful PUT request happened before. In this case, if the PUT request is successful, the existing file is overwritten. If the PUT request is failed, it doesn't replace the original file.