How to implement the installation of an application from the cloud?

Question

Software and Internet Services

Good day.
We decided with a friend to open our server in one online game and liked how the installation and update was implemented in the same Steam or Games.Mail.ru.
Those. the launcher is downloaded, which downloads the game itself and replaces the files when updating.
Interested in how this is implemented, or maybe someone has a simple program for an example?
Used by Swift

Answer 1

Some kind of console torrent client with an embedded torrent with an update is taken, shoved into the program, for insurance, the game loader is screwed over HTTP and forward.