nautalid 0.1.0

Scratch container substrate — TLS 1.3 HTTP/2+3 kernel, LID/AetherDB, optional filter bus (GPL-3.0-or-later).
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48

//! WebSocket surface — optional upgrade endpoint (distinct from HTTP/3 WebTransport).

use axum::Router;
use axum::extract::ws::{Message, WebSocket, WebSocketUpgrade};
use axum::routing::get;
use futures_util::{SinkExt, StreamExt};
use tracing::debug;

use crate::state::AppState;

use super::config::WebSocketSurface;

/// Register a WebSocket echo route at **`surface.path`**.
pub fn router(_state: &AppState, surface: &WebSocketSurface) -> Router<AppState> {
    let path = surface.path.clone();
    Router::new().route(
        &path,
        get(move |ws: WebSocketUpgrade| async move { ws.on_upgrade(handle_socket) }),
    )
}

async fn handle_socket(mut socket: WebSocket) {
    while let Some(msg) = socket.next().await {
        match msg {
            Ok(Message::Text(text)) => {
                if SinkExt::send(&mut socket, Message::Text(text)).await.is_err() {
                    break;
                }
            }
            Ok(Message::Binary(data)) => {
                if SinkExt::send(&mut socket, Message::Binary(data)).await.is_err() {
                    break;
                }
            }
            Ok(Message::Close(_)) => break,
            Ok(Message::Ping(data)) => {
                if SinkExt::send(&mut socket, Message::Pong(data)).await.is_err() {
                    break;
                }
            }
            Ok(Message::Pong(_)) => {}
            Err(err) => {
                debug!(%err, "websocket read ended");
                break;
            }
        }
    }
}