How to upload a file without using multipart/form-data in Play! framework

All,

I would like to upload quite a few large files (using Play! 2.8), but the upload should be done without using multipart/form-data submit. In other words, on the client side, the user will only provide the directory where these file stay, and the backend controller will receive this path, and iterate through every file inside this directory and upload them one by one directly.

What would be the best way to accomplish this?

Thanks!