In XFS1.5 , the system calculate it by per click, what I want is when client click to download a file but stop it later, this way for a large file (let's say 100M) client only get 10M, less then the full size, I want to have this 10M to be logged as this client's real traffic, how can I implement it...

many thanks

I want to custom my template main.html, for example add a variable like this <TMPL_VAR my_private_var> , how could I ? thanks.