/// <summary>
/// 缓存
/// </summary>
/// <param name="instance">HttpContext扩展</param>
/// <param name="durationInMinutes">时间</param>
public static void CacheKD(this HttpContext instance, int durationInMinutes) {
instance.CheckOnNull("instance");
TimeSpan duration = TimeSpan.FromMinutes(durationInMinutes);
HttpCachePolicy cache = instance.Response.Cache;
cache.SetCacheability(HttpCacheability.Public);
cache.SetExpires(DateTime.Now.Add(duration));
cache.AppendCacheExtension("must-revalidate, proxy-revalidate");
cache.SetMaxAge(duration);
}
/// <summary>
/// 缓存
/// </summary>
/// <param name="instance">HttpContext扩展</param>
/// <param name="duration">时间差</param>
public static void Cache(this HttpContext instance, TimeSpan duration) {
instance.CheckOnNull("instance");
HttpCachePolicy cache = instance.Response.Cache;
cache.SetCacheability(HttpCacheability.Public);
cache.SetOmitVaryStar(true);
cache.SetExpires(instance.Timestamp.Add(duration));
cache.SetMaxAge(duration);
cache.SetValidUntilExpires(true);
cache.SetLastModified(instance.Timestamp);
cache.SetLastModifiedFromFileDependencies();
cache.SetRevalidation(HttpCacheRevalidation.AllCaches);
}
/// <summary>
/// gzip压缩
/// </summary>
/// <param name="instance">HttpContext扩展</param>
public static void Compress(this HttpContext instance) {
instance.CheckOnNull("instance");
HttpRequest httpRequest = instance.Request;
if ((httpRequest.Browser.MajorVersion < 7) && httpRequest.Browser.IsBrowser("IE")) return; //IE7以下版本不支持
if (instance.IsEncodingAccepted("gzip")) {
instance.Response.Filter = new GZipStream(instance.Response.Filter, CompressionMode.Compress);
instance.SetEncoding("gzip");
} else if (instance.IsEncodingAccepted("deflate")) {
instance.Response.Filter = new DeflateStream(instance.Response.Filter, CompressionMode.Compress);
instance.SetEncoding("deflate");
}
}
