macOS Generating URL

would you care to elaborate on what language you would be doing your project in?

Basically you are on your own. If you are using the window.location object you can get the various parts of the URL:

If your document is at http://myhost.com:8080/my/folder/path/document.html?search=test#fred

hash: returns #fred
host: returns myhost.com:8080
hostname : returns myhost.com
href: the entire text
pathname: returns /my/folder/parh/document.html
port: returns 8080
protocol: returns http:
search: returns ?search=test

Notet that these are read/write so you can do (say) window.location.path = '/my/new/path/page.html';

If you just have a string then it's up to you to parse it.