I built a telnet chat server with WebAssembly

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  • chat

    A telnet chat server (by lunatic-solutions)

    Hi HN,

    I'm working on an Erlang inspired WebAssembly runtime for the backend[0]. Recently I added TCP support and was looking for apps I could build with it. I ended up building a telnet line chat app. It was a great dogfooding experience and has a nice retro feel to it.

    You can access the US server with:

    > telnet lunatic.chat

    or the EU one with:

    > telnet eu.lunatic.chat

    Pick the one closer to you, as all the rendering is done on the backend and lower latency will mean better UX.

    The server is open source[1] and written in Rust. The Rust code is then compiled to WebAssembly and runs on top of Lunatic. Each connection runs in a separate (lightweight) process, has it's own state and sends just a diff of esc-sequences back to the terminal to bring it up to date with the current render buffer. Everything is deployed to an ARM Linux box.

    [0]: https://github.com/lunatic-solutions/lunatic

    [1]: https://github.com/lunatic-solutions/chat

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