protected void Session_Start(object sender, EventArgs e)

        {

#if DEBUG

            //debug 登陆默认设置

#endif

        }

        protected void Application_BeginRequest(object sender, EventArgs e)

        {

        }

        protected void Application_End(object sender, EventArgs e)

        {

            Brotli.Brolib.FreeLibrary();

        }

        protected void Application_Error(object sender, EventArgs e)

        {

            //错误日志记录

        }

       protected void AddCompressSupport(HttpContext context)

        {

            Boolean doCompress = true;

            String compressMode = System.Web.Configuration.WebConfigurationManager.AppSettings["CompressMode"];

            if (!String.IsNullOrEmpty(compressMode))

            {

                Boolean.TryParse(compressMode, out doCompress);

            }

            //don't use compress for filehandler

            if (context.Request.Url.AbsoluteUri.Contains("FileHandler.ashx")) return;

            if (context.Response.ContentType.IndexOf("json", StringComparison.CurrentCultureIgnoreCase) >= 0

                || (context.Handler is System.Web.SessionState.IRequiresSessionState)

                )

            {

                context.Response.Cache.SetCacheability(HttpCacheability.NoCache);

                context.Response.Cache.SetMaxAge(TimeSpan.Zero);

                context.Response.Cache.SetExpires(new DateTime(2000, 1, 1));

            }

            if (doCompress)

            {

                var app = context.ApplicationInstance;

                String acceptEncodings = app.Request.Headers.Get("Accept-Encoding");

                if (!String.IsNullOrEmpty(acceptEncodings))

                {

                    System.IO.Stream baseStream = app.Response.Filter;

                    acceptEncodings = acceptEncodings.ToLower();

                    if (acceptEncodings.Contains("br") || acceptEncodings.Contains("brotli"))

                    {

                        app.Response.Filter = new Brotli.BrotliStream(baseStream, System.IO.Compression.CompressionMode.Compress);

                        app.Response.AppendHeader("Content-Encoding", "br");

                    }

                    else

                    if (acceptEncodings.Contains("deflate"))

                    {

                        app.Response.Filter = new System.IO.Compression.DeflateStream(baseStream, System.IO.Compression.CompressionMode.Compress);

                        app.Response.AppendHeader("Content-Encoding", "deflate");

                    }

                    else if (acceptEncodings.Contains("gzip"))

                    {

                        app.Response.Filter = new System.IO.Compression.GZipStream(baseStream, System.IO.Compression.CompressionMode.Compress);

                        app.Response.AppendHeader("Content-Encoding", "gzip");

                    }

                }

            }

        }

        protected void Application_PostAcquireRequestState(object sender, EventArgs e)

        {

            //压缩Response请求

            AddCompressSupport(Context);

        }