catch 401 error in entry server

async function preProcessor(forward: MiddlewareFn, event: FetchEvent, session: Session) {
  const response = await forward(event);
  console.log("status", response.status);
  if (response.status === 401) {
    return redirect("/", {
      headers: {
        "Set-Cookie": await storage.destroySession(session),
      },
    });
  }
  return response;
}

async function preProcessor(forward: MiddlewareFn, event: FetchEvent, session: Session) {
  const response = await forward(event);
  console.log("status", response.status);
  if (response.status === 401) {
    return redirect("/", {
      headers: {
        "Set-Cookie": await storage.destroySession(session),
      },
    });
  }
  return response;
}

 ({ forward }) => {
    return async (event) => {
      const pathname = new URL(event.request.url).pathname;
      const isApiPath = pathname.startsWith("/api") || pathname.startsWith("/_m");
      const session = await getSession(event.request.headers.get("Cookie"));
      if (isApiPath) {
        return await preProcessor (forward, event, session);
      }
})

 ({ forward }) => {
    return async (event) => {
      const pathname = new URL(event.request.url).pathname;
      const isApiPath = pathname.startsWith("/api") || pathname.startsWith("/_m");
      const session = await getSession(event.request.headers.get("Cookie"));
      if (isApiPath) {
        return await preProcessor (forward, event, session);
      }
})