The :url extension adds a few methods that process the raw URL information
into something more digestable.
Specifically, it adds:
#base_url: That's schema + host + port (unless it is the default for the scheme). E.g.'https://example.org'or'http://example.org:8000'.#path: That's script name (if any) + path information. E.g.'index.rb/users/1'or'users/1'.#full_path: That's path + query string (if any). E.g.'users/1?view=table'.#url: That's base url + full path. E.g.'http://example.org:8000/users/1?view=table'.