mvc 文件压缩 减少文件大小

using System;
using System.Collections.Generic;
using System.IO.Compression;
using System.Linq;
using System.Web;
using System.Web.Mvc;

namespace PaiXie.Pos.Admin {
    /// <summary>
    /// 文件压缩 
    /// </summary>
    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.AppendHeader("Content-encoding", "gzip");
                response.Filter = new GZipStream(response.Filter, CompressionMode.Compress);
            }
            else if (acceptEncoding.Contains("DEFLATE")) {
                response.AppendHeader("Content-encoding", "deflate");
                response.Filter = new DeflateStream(response.Filter, CompressionMode.Compress);
            }
        }
    }
}