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using System;
using System.Collections.Generic;
using System.Text;
namespace Apewer.Web
{
/// <summary>缓存控制的值。</summary>
public static class CacheControl
{
/// <summary>不缓存。</summary>
public const string Disabled = "no-cache, no-store, must-revalidate";
/// <summary>1 天的秒数。</summary>
public const int Day = 86400;
/// <summary>30 天的秒数。</summary>
public const int Month = 259200;
/// <summary>365 天的秒数。</summary>
public const int Year = 31536000;
/// <summary>构建缓存指令,此指令允许所有缓存。</summary>
/// <param name="maxAge">浏览器的缓存秒数。</param>
/// <param name="sMaxAge">代理服务器的缓存秒数。</param>
public static string Public(int maxAge, int sMaxAge)
{
if (maxAge < 0) throw new ArgumentOutOfRangeException(nameof(maxAge));
if (sMaxAge < 0) throw new ArgumentOutOfRangeException(nameof(sMaxAge));
return $"public, max-age={maxAge}, s-maxage={sMaxAge}, must-revalidate";
}
/// <summary>构建缓存指令,此指令仅允许浏览器缓存。</summary>
/// <param name="maxAge">浏览器的缓存秒数。</param>
public static string Private(int maxAge)
{
if (maxAge < 0) throw new ArgumentOutOfRangeException(nameof(maxAge));
return $"private, max-age={maxAge}, must-revalidate";
}
}
}