以前学过IHttpModule实现，这次用到了（.net2013），注册完成后出现如下错误：

An ASP.NET setting has been detected that does not apply in Integrated managed pipeline mode

其实在web.config里面加上如下配置就好了

<configuration>

    <system.webServer>

        <validation validateIntegratedModeConfiguration="false"/>

    </system.webServer>

</configuration>

怕下次找费时间，记下来