Determining Download Success

[Anon]

I have this huge file that is served to the client embedded in a HTML file. My objective is to know if the file download was successful (meaning downloaded completely) or not and log the download in mySQL using php.
I cannot depend in the server logs because there's always the discrepancy between the file and the HTML it is embedded to (DON'T KNOW WHY, MAYBE SOMEONE COULD EXPLAIN IT TO ME AS WELL). And I cannot assume that the number of file downloads is equivalent to the number of HTML downloads because the HTML is created on-the-fly (AND NO THIS DOES NOT CAUSE THE DISCREPANCY ISSUE ABOVE).
Thank you for reading.
And thanks in advance for your reply.
Any suggestions would be greatly appreciated.

[stuartc1]

You say the file is embedded in the HTML file and you want to know if has been fully downloaded, right. Well can't you just place a piece of PHP code after the file and if it reaches that code you know it has downloaded (use this code to add a counter number to your D😎?
This is not going to be 100% but lets face it nothing is ! unless you ask each downloaded to tell you - but that not likely.