Low level information needed to download files via http and html

Question

I am studying the process of downloading a file via http. My question is how the file is uploaded via ajax and not through full back pages. I want to know how a file is transmitted through ajax. I read this article . The mentioned article says that this method is not possible if FormData is not available. But I want to know if there is any other way to make the ajax file download in all browsers without using the iframe method?

Answer 1

without FormDatayou need to use iframe. Alternatively, there are libraries that emulate functionality using hidden flash or silverlight.