2缓存混乱

@Throws(IOException::class)
override fun intercept(chain: Interceptor.Chain): Response {
    var request = chain.request()
    if (!isNetworkAvailable()) {
        request = request.newBuilder().header("Cache-Control",
                "public, only-if-cached, max-stale=" + 60 * 60 * 24).build()
        return chain.proceed(request)
    }
    return chain.proceed(request)
}

但是我们操纵请求头,不应该根据响应头缓存工作吗?

有没有关于缓存机制的好文章,包括有用的头文件?