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);
             }
         }
     }
 }