Cyberduck, an FTP client, takes a similar (though easier) approach. You can buy it on the Mac App Store for $23.99 [0], get precompiled binaries for free on their website [1], or grab the source yourself [2].

[0]: https://itunes.apple.com/us/app/cyberduck/id409222199 [1]: http://cyberduck.ch [2]: https://trac.cyberduck.ch/browser