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chat
- Lunatic is an Erlang-inspired runtime for WebAssembly
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Charm – tools to make the command line glamorous
TUIs over ssh/telnet can be a lot of fun. Especially in cases where multiple people can interact with each other on the server. It simplifies the programming model as you only have one state on the backend that you render to multiple connections. Syncing up everyone becomes trivial. You can also use some React concepts, like rendering a virtual TUI and sending just the right set of minimal escape sequences back to the user to bring their display up to date.
A few months ago I implemented a telnet chat server[0] for fun and it was surprisingly easy to do so. Even by using a wasm vm that I was still working on at the same time.
[0]: https://github.com/lunatic-solutions/chat
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Launch HN: Lunatic (YC W21) – An Erlang Inspired WebAssembly Platform
We are investing a lot of effort into making Lunatic feel native to the particular language and ecosystem. If you look at the Rust chat server we built in Lunatic (https://github.com/lunatic-solutions/chat), it fully integrates with cargo. You just run your typical “cargo run” command, it will compile the app to wasm and use lunatic to run it. If you want to run your test, you can just do “cargo test”.
wasm-bindgen is necessary only because it’s really hard right now to merge the wasm world and the JS one in the browser. We have the advantage here of staying out of the browser.
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How I built a telnet chat server in 2021 with WebAssembly
It took me around a week to build it with Rust + Lunatic and you can check out the code here. If you would like to try it out you can connect to it with:
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The Stakker actor runtime: Beyond "Go++"
Recently I implemented a command line chat server in Rust using an actor framework. I model each TCP connection as an actor.
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I built a telnet chat server with WebAssembly
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
- WebAssembly Powered Telnet Chat
- Lunatic.chat – A WebAssembly powered telnet chat
- A telnet chat server powered by WebAssembly
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telnet lunatic.chat – A chat server for the terminal
The server is open source 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.
wetty
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Homelab Adventures: Crafting a Personal Tech Playground
WeTTY
- What is the best ssh web based app with docker currently??
- Question about Data Transfer to New NAS
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Anybody have a good dashboard tool recommendation?
I use wetty for a terminal in a browser. https://github.com/butlerx/wetty
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How to expose the server terminal(truenas or any linux) with Traefik?
You’re already running docker. Install Wetty. Works great. Make sure you have strong strong Auth though.
- Access SSH through web ui.
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Managing SSH Sessions Doesn't Have to be a Royal Pain
Can RGNets look into integrating Wetty, terminal over https (https://github.com/butlerx/wetty) where we can ssh to devices it manages from the fleet or the rXg itself without giving direct shell access to users.
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Charm – tools to make the command line glamorous
ttyd is a nice little web terminal: https://github.com/tsl0922/ttyd Just small, fast, low fuss C-based executable.
wetty is another good option if you want to run a nodejs app: https://github.com/butlerx/wetty
Both use xterm.js for the client terminal, which is these days the only game in town for a web terminal (it's what VS code and many other electron apps use too). It's quite good.
Do be aware though that running a web-accessible terminal is a huge security headache. You're opening up a websocket to effectively allow commands and code to run on your server. Pay attention to security and authentication options any web terminal gives you, and use them. Most are not very secure out of the box or just following their readme examples.
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SSH from a container?
Do you mean something like Wetty?
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Example of a web app interacting with backend process via terminal-like interface?
Hello, does anyone know of an open source project/web app/library, written in Haskell, that makes terminal interface accessible via browser? An example of what I'd like to achieve: Start R repl process withing a docker container on the backend (e.g. `docker run -it --rm rocker/r-base`) and allow user to interact with it using terminal-like interface from their browser (with stuff like TAB completion working etc.) It seems that xterm.js is a popular choice to implement the client side of such a thing, but I'm looking for some inspiration of how a backend of such an application could be implemented in Haskell. Examples in other languages that do similar thing to what I'd like: Go: https://github.com/yudai/gotty Typescript: https://github.com/butlerx/wetty
What are some alternatives?
meetings - WebAssembly meetings (VC or in-person), agendas, and notes
gotty - Share your terminal as a web application
lunatic - Lunatic is an Erlang-inspired runtime for WebAssembly
ttyd - Share your terminal over the web
chrono - Date and time library for Rust
aura-theme - ✨ A beautiful dark theme for your favorite apps.
embly - Attempt at building an opinionated webassembly runtime for web services
haskell-webshell - Webshell - pipe your shell to the browser over websockets
lumen - An alternative BEAM implementation, designed for WebAssembly
ssh-pageant - An SSH authentication agent for Cygwin/MSYS to PuTTY's Pageant.
mapscii - 🗺 MapSCII is a Braille & ASCII world map renderer for your console - enter => telnet mapscii.me <= on Mac (brew install telnet) and Linux, connect with PuTTY on Windows
charm - The Charm Tool and Library 🌟