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deeper-blue / negativei2-server

The server for Deeper Blue, an assistive chess-playing robot. Developed for the System Design Project, a 3rd year course offered at the School of Informatics, University of Edinburgh.
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Enable realtime updates #25

Closed notexactlyawe closed 5 years ago

notexactlyawe commented 5 years ago

Puts in the server code to enable real time updating of the /play page on the front-end.

How it works

Socket.IO allows for rooms which let you broadcast events to a number of clients at once. The client has to register for the room (register_for_game_updates) and then will receive all updates posted to that room.

We create rooms dynamically for each game ID by the client sending a message of type 'register' to the server with the game ID as the room name. The server will then register the client for that room. When a move is made, the server will emit the game state to the room for the game ID that was updated.

Little bits

The change in Procfile is because flask-socketio requires a library called eventlet and when running this with Gunicorn, you need to specify that. -w 1 limits to only one worker thread since Gunicorn doesn't support any more with eventlet. This shouldn't be a problem for the scope of this project, but in a real system, we may need to use a different web server.

notexactlyawe commented 5 years ago

This was a useful example -> https://gist.github.com/crtr0/2896891