passing a file to a cgi script

[Angharad]

I have a cgi script that works well for one 'item' but now need to pass a number of items and process them one at a time.

I think the easiest way to do this would be to pass the list as a file to the cgi script. How do I pass a file to a cgi script please though the browser? I know to pass one 'item' its like

http://myurl/cgi-bin/upload.cgi?id=item1

Is it something similar for an entire file? And how might I go about accessing the file in a cgi script?

Thanks for your help!!