Well, of course it's possible 🙂
You have to use some mechanism to access the file, and the only criteria is that this mechanism gives you the data you need. Http does not (to my knowledge). However, if you need to use http, you can ofcourse create a php, asp, cgi or whatever script to return this data, and go from there.
Alternately, you can use FTP (wich will give you this information), NFS, samba or similar. For more "hints", please tell us what software is available (OS? webserver on both machines? other useful servers? etc.)
:p