...Thinking out loud:
If it is values you seek from the url, or any other thing that lead a user to your program, and your using a database with web resources on your own host, you could perhaps use a simple php landing page.
Like, link to your game becomes: somewhere.com/game/game1/index.php (insteead of index.html)
Have the PHP catch anything you need, from URL variable, to surfer details, to user login details etc, and stuff that in a database with a generated code by php. Then have PHP forward you to your index.html.
When the game starts perform an ajax request to your server which again generates the code and fetches whatever details you had it store.