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"); } } } }