Simulate file upload from client

I need to upload large (>10GB) files from a client to a remote server. Http header authentication required. I need to be able to simulate the file upload step - ie, the user types in a file location and file name, without actually browsing for it with a fileupload control. I need to avoid this because, seeing as the files are potentially hu开发者_JAVA技巧ge, the time it would take for the file to be consumed and passed to the server for further processing would be too long. Is there any other way to do this??

Thanks