In progress - another sample app for learning the Rust language. It's a basic Node.js websocket-based server that runs Rust code through an FFI/foreign function interface.
Right now, it just takes a string and sends it to the server via a websocket. The server runs the string through wrappered Rust code, then returns a JSON object to the browser with details about the request and the character count of the string (based on this example).
This is a Heroku app running on Linux - I also wrote a Windows-compatible version, in the "windows" folder, that runs on localhost:5000.