WebSockets

Feature activation

nestforge = { version = "1", features = ["websockets"] }

Gateway model

WebSocket support is built around WebSocketGateway and WebSocketContext.

use nestforge::{
    Message, NestForgeFactory, NestForgeFactoryWebSocketExt, WebSocket, WebSocketContext,
    WebSocketGateway,
};

struct EventsGateway;

impl WebSocketGateway for EventsGateway {
    fn on_connect(
        &self,
        ctx: WebSocketContext,
        mut socket: WebSocket,
    ) -> core::pin::Pin<Box<dyn core::future::Future<Output = ()> + Send>> {
        Box::pin(async move {
            if let Some(request_id) = ctx.request_id() {
                let _ = socket
                    .send(Message::Text(format!("connected:{}", request_id.value()).into()))
                    .await;
            }
        })
    }
}

Mount the gateway

NestForgeFactory::<AppModule>::create()?
    .with_websocket_gateway(EventsGateway)
    .listen(3000)
    .await?;

Default path:

• /ws

Access to providers

WebSocketContext exposes the framework container, request data, optional auth identity, and request ID. That means a gateway can resolve the same application services already used by HTTP handlers or GraphQL resolvers.

WebSockets plus microservices

If microservices is also enabled, gateways can forward frames into a MicroserviceRegistry. That is useful for event-driven or command-style websocket protocols that map cleanly to pattern handlers.