1 using System.IO;
2 using System.IO.Compression;
3 using System.Web;
4 using System.Web.Mvc;
5
6 public class CompressAttribute : ActionFilterAttribute
7 {
8 public override void OnResultExecuted(ResultExecutedContext filterContext)
9 {
10 //如果出现错误，则不进行压缩，否则页面会出现乱码，而不是报错的黄页
11 if (filterContext.Exception != null)
12 return;
13
14 HttpResponseBase Response = filterContext.HttpContext.Response as HttpResponseBase;
15
16 //判断IIS或者其他承载设备是是否启用了GZip或DeflateStream
17 if (Response.Filter is GZipStream || Response.Filter is DeflateStream)
18 return;
19
20 //开始进入压缩环节
21 string AcceptEncoding = filterContext.HttpContext.Request.Headers["Accept-Encoding"];
22 if (!string.IsNullOrEmpty(AcceptEncoding) && (AcceptEncoding.Contains("gzip") || AcceptEncoding.Contains("deflate")))
23 {
24 if (AcceptEncoding.Contains("gzip"))
25 {
26 Response.Filter = new GZipStream(Response.Filter, CompressionMode.Compress);
27 Response.Headers.Remove("Content-Encoding");
28 Response.AppendHeader("Content-Encoding", "gzip");
29 }
30 else
31 {
32 Response.Filter = new DeflateStream(Response.Filter, CompressionMode.Compress);
33 Response.Headers.Remove("Content-Encoding");
34 Response.AppendHeader("Content-Encoding", "deflate");
35 }
36 }
37 }
38 }
