IVR getting audio file from URL

I need the IVR to get the phone number of the caller and a user account id dialed by the caller and send to a URL and then a servlet will return a specific audio file for that caller.
Example:
IVR gets the CALLER_PHONE_NUMBER and ACCOUNT_ID and gets the file from the URL:
http://www.site.com/servlet?caller=CALLER_NUMBER&id=ACCOUNT_ID.

Can anyone tell me how to do that?

Thanks
Flavio Tobias