[Haskell-cafe] WebSocket on Haskell?

Dear cafe, Would you tell me reference sources for WebSocket(or Socket.io) on Haskell? Once I wrote a toy program with WebSocket[1]: Node.js(backend) + JavaScript(frontend) + WebSocket(communication) I want to port it to Haskell backend for my exercise: Haskell(backend) + JavaScript(frontend) + WebSocket(communication) I'm glad if there are such references: * broadcast to multi-client by WebSocket(or Socket.io) * serve a simple top HTML page * deploy to Heroku or public server [1] https://github.com/takenobu-hs/social-drawing-old-js Thank you :-), Takenobu