request_uri (ActionController::AbstractRequest)

    # File lib/action_controller/request.rb, line 133
        def request_uri
          if uri = @env['REQUEST_URI']
            (%r{^\w+\://[^/]+(/.*|$)$} =~ uri) ? $1 : uri # Remove domain, which webrick puts into the request_uri.
          else  # REQUEST_URI is blank under IIS - get this from PATH_INFO and SCRIPT_NAME
            script_filename = @env['SCRIPT_NAME'].to_s.match(%r{[^/]+$})
            uri = @env['PATH_INFO']
            uri = uri.sub(/#{script_filename}\//, '') unless script_filename.nil?
            unless (env_qs = @env['QUERY_STRING']).nil? || env_qs.empty?
              uri << '?' << env_qs
            end
            uri
          end
        end