ASP.NET MVC 中使用 HttpModule 来响应或动态改变静态文件

代码：

public class HtmlHttpModule : IHttpModule
    {
        public void Dispose()
        {
            
        }

        public void Init(HttpApplication context)
        {
            context.BeginRequest += new EventHandler(context_BeginRequest);
            context.EndRequest += new EventHandler(context_EndRequest);
        }

        void context_EndRequest(object sender, EventArgs e)
        {
            HttpApplication application = (HttpApplication)sender;
            HttpContext context = application.Context;
            string filePath = context.Request.FilePath;
            string fileExtension = VirtualPathUtility.GetExtension(filePath);
            if (fileExtension.Equals(".html") || fileExtension.Equals(".htm"))
            {
                //判断缓存是否存在，不存在加入缓存，调用生成静态的类和方法  
                //产品过期，移除静态文件，302重定向  
                if (System.IO.File.Exists(context.Server.MapPath(filePath)))  
                {  
                    context.Response.WriteFile(context.Server.MapPath(filePath));  
                    context.Response.End();  
                }
            }


        }

        void context_BeginRequest(object sender, EventArgs e)
        {
            HttpApplication application = (HttpApplication)sender;
            HttpContext context = application.Context;
            string filePath = context.Request.FilePath;
            string fileExtension = VirtualPathUtility.GetExtension(filePath);
            if (fileExtension.Equals(".html") || fileExtension.Equals(".htm"))
            {
                context.Response.Write("<hr><h1><font color=red>" +
                    "HelloWorldModule: End of Request</font></h1>");
            }

        }
    }

 

谢谢！