指标

const server = Bun.serve({
  fetch(req, server) {
    return new Response(
      `活动请求: ${server.pendingRequests}\n` + `活动 WebSocket: ${server.pendingWebSockets}`,
    );
  },
});

const server = Bun.serve({
  fetch(req, server) {
    const chatUsers = server.subscriberCount("chat");
    return new Response(`${chatUsers} 个用户在聊天中`);
  },
  websocket: {
    message(ws) {
      ws.subscribe("chat");
    },
  },
});