{"test":"stale-while-revalidate","cacheControl":"public, max-age=10, stale-while-revalidate=60, stale-if-error=300","description":"缓存过期后 10s 内可提供陈旧响应同时后台刷新；源站错误时可提供 5 分钟内的陈旧缓存","timestamp":"2026-07-22T10:18:26.950Z"}