download some link with script

Hello,
first of all sorry for my poor english …

to bypass censorship in IRAN, I need some way to download some files with my routerOS that is outside IRAN …
I need a script to download a file from given link and save it to disk, how can I get it?
Thanks

https://help.mikrotik.com/docs/display/ROS/Fetch

Things always the same, URL, headers, output path.