https://github.com/turbomack/hs-websockets-workshop

Intoroduction to websockets in Haskell
https://github.com/turbomack/hs-websockets-workshop

haskell tutorial websockets

Last synced: 25 days ago
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Intoroduction to websockets in Haskell

• Host: GitHub
• URL: https://github.com/turbomack/hs-websockets-workshop
• Owner: turboMaCk
• Created: 2021-10-08T13:53:37.000Z (over 3 years ago)
• Default Branch: main
• Last Pushed: 2021-10-14T15:32:57.000Z (over 3 years ago)
• Last Synced: 2024-11-08T10:52:29.699Z (3 months ago)
• Topics: haskell, tutorial, websockets
• Language: Haskell
• Homepage:
• Size: 44.9 KB
• Stars: 6
• Watchers: 3
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • Changelog: CHANGELOG.md

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README

        
# WebSockets Server in Haskell

Simple example implementation of websockets server in haskell.

1. See [`Main.hs`](app/Main.hs) for instructions

2. Client code already [implemeted](index.html)

3. Nix and Stack ready

4. [Open live app](http://chat.planning-game.com)

5. Check [cheat branch](https://github.com/turboMaCk/hs-websockets-workshop/tree/cheat) for example implementation

## Nix

- you can use `cabal` within `nix-shell`

- to enable [direnv](https://direnv.net/) use `echo "use_nix" > .envrc && direnv allow`

- you can use `nix-build` to build project using nix

## Stack

- stack based workflow should be working. use `stack --help` to learn how to use it.

## Intro

Today we're building:

- simple steteful websockets based chat room

- no database

- using STM for state

- no wai/warp

- no MTL, tagless final etc. Beginner Haskell

- persistent sessions, multiple connections per session etc.

## More resources

- [Jasper's own introduction to websockets](https://jaspervdj.be/websockets/example/server.html)

- [servant-websockets](https://hackage.haskell.org/package/servant-websockets) for Servant projects

- [wai-websockets](https://hackage.haskell.org/package/wai-websockets) for any wai app

- [check hackage](https://hackage.haskell.org/packages/search?terms=websockets) for more