Skip to content

A socket.io server implementation in Rust that integrates with the Tower ecosystem and the Tokio stack.

License

Notifications You must be signed in to change notification settings

Totodore/socketioxide

Folders and files

NameName
Last commit message
Last commit date

Latest commit

Β 
Β 
Β 
Β 
Β 
Β 
Β 
Β 
Β 
Β 
Β 
Β 
Β 
Β 
Β 
Β 
Β 
Β 
Β 
Β 
Β 
Β 
Β 
Β 
Β 

Repository files navigation

Socketioxide πŸš€πŸ¦€

A socket.io server implementation in Rust that integrates with the Tower ecosystem and the Tokio stack. It integrates with any server framework based on tower like Axum, Warp, Salvo, Viz or Hyper. Add any other tower based middleware on top of socketioxide such as CORS, authorization, compression, etc with tower-http.

⚠️ This crate is under active development and the API is not yet stable.

Crates.io Documentation CI

Features :

Planned features :

  • Other adapter to share state between server instances (like redis adapter), currently only the in memory adapter is implemented
  • State recovery when a socket reconnects

Examples :

Chat app πŸ’¬ (see full example here)
io.ns("/", |s: SocketRef| {
    s.on("new message", |s: SocketRef, Data::<String>(msg)| {
        let username = s.extensions.get::<Username>().unwrap().clone();
        let msg = Res::Message {
            username,
            message: msg,
        };
        s.broadcast().emit("new message", msg).ok();
    });

    s.on(
        "add user",
        |s: SocketRef, Data::<String>(username), user_cnt: State<UserCnt>| {
            if s.extensions.get::<Username>().is_some() {
                return;
            }
            let num_users = user_cnt.add_user();
            s.extensions.insert(Username(username.clone()));
            s.emit("login", Res::Login { num_users }).ok();

            let res = Res::UserEvent {
                num_users,
                username: Username(username),
            };
            s.broadcast().emit("user joined", res).ok();
        },
    );

    s.on("typing", |s: SocketRef| {
        let username = s.extensions.get::<Username>().unwrap().clone();
        s.broadcast()
            .emit("typing", Res::Username { username })
            .ok();
    });

    s.on("stop typing", |s: SocketRef| {
        let username = s.extensions.get::<Username>().unwrap().clone();
        s.broadcast()
            .emit("stop typing", Res::Username { username })
            .ok();
    });

    s.on_disconnect(|s: SocketRef, user_cnt: State<UserCnt>| {
        if let Some(username) = s.extensions.get::<Username>() {
            let num_users = user_cnt.remove_user();
            let res = Res::UserEvent {
                num_users,
                username: username.clone(),
            };
            s.broadcast().emit("user left", res).ok();
        }
    });
});
Echo implementation with Axum πŸ“
use axum::routing::get;
use serde_json::Value;
use socketioxide::{
    extract::{AckSender, Bin, Data, SocketRef},
    SocketIo,
};
use tracing::info;
use tracing_subscriber::FmtSubscriber;

fn on_connect(socket: SocketRef, Data(data): Data<Value>) {
    info!("Socket.IO connected: {:?} {:?}", socket.ns(), socket.id);
    socket.emit("auth", data).ok();

    socket.on(
        "message",
        |socket: SocketRef, Data::<Value>(data), Bin(bin)| {
            info!("Received event: {:?} {:?}", data, bin);
            socket.bin(bin).emit("message-back", data).ok();
        },
    );

    socket.on(
        "message-with-ack",
        |Data::<Value>(data), ack: AckSender, Bin(bin)| {
            info!("Received event: {:?} {:?}", data, bin);
            ack.bin(bin).send(data).ok();
        },
    );
}

#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
    tracing::subscriber::set_global_default(FmtSubscriber::default())?;

    let (layer, io) = SocketIo::new_layer();

    io.ns("/", on_connect);
    io.ns("/custom", on_connect);

    let app = axum::Router::new()
        .route("/", get(|| async { "Hello, World!" }))
        .layer(layer);

    info!("Starting server");

    let listener = tokio::net::TcpListener::bind("0.0.0.0:3000").await.unwrap();
    axum::serve(listener, app).await.unwrap();

    Ok(())
}
Other examples are available in the example folder

Contributions and Feedback / Questions :

Any contribution is welcome, feel free to open an issue or a PR. If you want to contribute but don't know where to start, you can check the issues.

If you have any question or feedback, please open a thread on the discussions page.

License πŸ”

This project is licensed under the MIT license.