[IIS, ISAPI] Detecting Disconnections with an HTTPS Client

Hi Everyone,

We have an application at client end that opens a long running connection with IIS. Ideally, it opens a connection with KeepAlive ON, and the server maintains the connection for as long as 15 minutes. In between some times, the client get disconnected due to shaky WIFI connectivity.

I wanted to know, if it is possible to detect if a Client is disconnected abnormally by Writing an ISAPI Extension or Filter?

If Yes, Can someone throw some light on the approach to take ?

If No, Is there any other way to detect the connectivity termination ?

Thanks,

-Vipul Pathak