压缩请求数据（优化页面加载太慢之一）

 1     /// <summary>
 2     /// 允许压缩
 3     /// </summary>
 4     public class AllowCompressAttribute : System.Web.Mvc.ActionFilterAttribute
 5     {
 6         /// <summary>
 7         /// 压缩方法
 8         /// </summary>
 9         public override void OnResultExecuting(ResultExecutingContext filterContext)
10         {
11             string acceptEncoding = filterContext.HttpContext.Request.Headers["Accept-Encoding"];
12             if (String.IsNullOrEmpty(acceptEncoding)) return;
13             var response = filterContext.HttpContext.Response;
14             acceptEncoding = acceptEncoding.ToUpperInvariant();
15             //查看客户端是否支持压缩
16             if (acceptEncoding.Contains("GZIP"))
17             {
18                 response.AppendHeader("Content-Encoding", "gzip");
19                 response.Filter = new GZipStream(response.Filter, CompressionMode.Compress);
20             }
21             else if (acceptEncoding.Contains("DEFLATE"))
22             {
23                 response.AppendHeader("Content-Encoding", "deflate");
24                 response.Filter = new DeflateStream(response.Filter, CompressionMode.Compress);
25             }
26             base.OnResultExecuting(filterContext);
27         }
28     }