using System.IO;
using System.IO.Compression;
using System.Web;
using System.Web.Mvc;
public class CompressAttribute : ActionFilterAttribute
{
public override void OnResultExecuted(ResultExecutedContext filterContext)
{
//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
if (filterContext.Exception != null)
return;
HttpResponseBase Response = filterContext.HttpContext.Response as HttpResponseBase;
//判断IIS或者其他承载设备是是否启用了GZip或DeflateStream
if (Response.Filter is GZipStream || Response.Filter is DeflateStream)
return;
//开始进入压缩环节
string AcceptEncoding = filterContext.HttpContext.Request.Headers["Accept-Encoding"];
if (!string.IsNullOrEmpty(AcceptEncoding) && (AcceptEncoding.Contains("gzip") || AcceptEncoding.Contains("deflate")))
{
if (AcceptEncoding.Contains("gzip"))
{
Response.Filter = new GZipStream(Response.Filter, CompressionMode.Compress);
Response.Headers.Remove("Content-Encoding");
Response.AppendHeader("Content-Encoding", "gzip");
}
else
{
Response.Filter = new DeflateStream(Response.Filter, CompressionMode.Compress);
Response.Headers.Remove("Content-Encoding");
Response.AppendHeader("Content-Encoding", "deflate");
}
}
}
}