auth-and-ack

Overview ¶

Example: Socket.IO server with handshake auth, listener-side payload.Ack, server-initiated EmitWithAckTimeout, and graceful Shutdown(ctx) on SIGINT/SIGTERM.

Client (socket.io-client v4):

const s = io("http://localhost:3000", {
    path: "/ws",
    transports: ["websocket"],
    auth: { token: "secret" },
});
s.emit("hello", "world", (reply) => console.log("ack:", reply));
s.on("ping", (n, cb) => cb("pong-" + n));