public?class?CompressFilter?:?ActionFilterAttribute
{
????public?override?void?OnActionExecuting（ActionExecutingContext?filterContext）
????{
????????HttpRequestbase?request?=?filterContext.HttpContext.Request;

????????string?acceptEncoding?=?request.Headers[“Accept-Encoding“];

????????if?（string.IsNullOrEmpty（acceptEncoding））?return;

????????acceptEncoding?=?acceptEncoding.ToUpperInvariant（）;

????????HttpResponsebase?response?=?filterContext.HttpContext.Response;

????????if?（acceptEncoding.Contains（“GZIP“））
????????{
????????????response.Appe