User Specified Download Location

I've been looking about for a while now and I cant find a proper answer. Basically I have a web page that lets the user enter somevalues and download a specific file depending on t

Solution 1:

Whether the browser asks the user or not is down to the user's preferences in the browser. You can't bypass those preferences (nor, really, should you — if the user wants to always download files to a specified location, they should be allowed to do that).

What you can do is make sure you're sending the browser as much information as possible to help it make for a good user experience. If you're not already doing so (you probably are), be sure to include a Content-Disposition header in the response to the download request, including a filename field:

Content-Disposition: attachment; filename=foo.csv

But I'm guessing you're already doing that part.