Accessing Http Upload Data Before Upload Completion

Is there any way to access a file being uploaded over http using a CGI script before the upload finishes? For example, say a 10 megabyte file is being uploaded, and is exactly 10%

Solution 1:

CGI is the specification of communication between the web server and the external application. It does not allow for this.

In fact, most web servers won't do anything with an upload until it finishes, but there's no reason you couldn't write/change one (or MAYBE find one, but I don't know which it would be) to allow access, but you're still not going to do it via a CGI.

http://www.ietf.org/rfc/rfc3875