actix-website/examples/websockets/src/main.rs

// <websockets>
use actix::{Actor, StreamHandler};
use actix_web::{web, App, Error, HttpRequest, HttpResponse, HttpServer};
use actix_web_actors::ws;

/// Define http actor
struct MyWs;

impl Actor for MyWs {
    type Context = ws::WebsocketContext<Self>;
}

/// Handler for ws::Message message
impl StreamHandler<ws::Message, ws::ProtocolError> for MyWs {
    fn handle(&mut self, msg: ws::Message, ctx: &mut Self::Context) {
        match msg {
            ws::Message::Ping(msg) => ctx.pong(&msg),
            ws::Message::Text(text) => ctx.text(text),
            ws::Message::Binary(bin) => ctx.binary(bin),
            _ => (),
        }
    }
}

fn index(req: HttpRequest, stream: web::Payload) -> Result<HttpResponse, Error> {
    let resp = ws::start(MyWs {}, &req, stream);
    println!("{:?}", resp);
    resp
}

fn main() {
    HttpServer::new(|| App::new().route("/ws/", web::get().to(index)))
        .bind("127.0.0.1:8088")
        .unwrap()
        .run()
        .unwrap();
}
// </websockets>

// testing requires specific headers:
// Upgrade: websocket
// Connection: Upgrade
// Sec-WebSocket-Key: SOME_KEY
// Sec-WebSocket-Version: 13