asp.net 利用Response.Filter 获取输出内容, 变更输出内容
重写 Response.Filter 就可以获取或更新输出到浏览器的内容
资料:
http://stackoverflow.com/questions/14925433/asp-net-response-filter
http://www.cnblogs.com/cnshangsha/archive/2010/05/06/Ten_practices_aspnet_performance.html