实现HTTP页面、资源文件压缩

来源：互联网发布：ios商城项目源码编辑：程序博客网时间：2024/04/27 04:08

与IIS站点压缩资源文件相比，通过APP方式压缩，相对比较灵活，当然采用前端硬件层缓存压缩机制或第三方组件除外。

1、自定义压缩文件过滤

2、附加处理业务逻辑、计算

以下是实现代码：

    /// <summary>    /// 页面压缩处理    /// </summary>    public class CompressionModule : IHttpModule    {        #region -- Attributes --        private DateTime _StartTime;        private bool IsBig5 = false;        private static string ipKey = "_forbidIpKey";        private static int forbidTime = 3 * 60;//3小时        public static int timeCountIp = 3;//10分钟        public static string key = "encodingNullIPList";        #endregion        #region -- Constructor --        public CompressionModule()        {        }        #endregion        #region -- IHttpModule Members --        void IHttpModule.Dispose()        {        }        void IHttpModule.Init(HttpApplication context)        {            //if (PayConfig.EnableCompressPage == "1")            //{            //    context.BeginRequest += new EventHandler(context_BeginRequest);            //}        }        #endregion        #region Compression        private const string GZIP = "gzip";        private const string DEFLATE = "deflate";        /// <summary>        /// Handles the BeginRequest event of the context control.        /// </summary>        /// <param name="sender">The source of the event.</param>        /// <param name="e">The <see cref="System.EventArgs"/> instance containing the event data.</param>        void context_BeginRequest(object sender, EventArgs e)        {            string url = HttpContext.Current.Request.Url.ToString().ToLower();            string fileName = GlobalItem.DeriveFileName(url).ToLower();            string page = LinQHelper.GetConfig("CompressPage").ToLower();            if (page.Length == 0 || page.IndexOf(fileName) < 0)            {                return;            }            HttpApplication app = sender as HttpApplication;            //压缩aspx页面            if (app.Request.Url.ToString().Contains(".aspx"))            {                //是否支持压缩协议                if (IsEncodingAccepted(GZIP))                {                    app.Response.Filter = new GZipStream(app.Response.Filter, CompressionMode.Compress);                    SetEncoding(GZIP);                }                else if (IsEncodingAccepted(DEFLATE))                {                    app.Response.Filter = new DeflateStream(app.Response.Filter, CompressionMode.Compress);                    SetEncoding(DEFLATE);                }            }        }        /// <summary>        /// Checks the request headers to see if the specified        /// encoding is accepted by the client.        /// </summary>        private static bool IsEncodingAccepted(string encoding)        {            return HttpContext.Current.Request.Headers["Accept-encoding"] != null                 && HttpContext.Current.Request.Headers["Accept-encoding"].Contains(encoding);        }        /// <summary>        /// Adds the specified encoding to the response headers.        /// </summary>        /// <param name="encoding"></param>        private static void SetEncoding(string encoding)        {            HttpContext.Current.Response.AppendHeader("Content-encoding", encoding);        }        #endregion    }