find_routes

# File actionpack/lib/action_dispatch/journey/router.rb, line 95
        def find_routes req
          routes = filter_routes(req.path_info).concat custom_routes.find_all { |r|
            r.path.match(req.path_info)
          }

          routes =
            if req.head?
              match_head_routes(routes, req)
            else
              match_routes(routes, req)
            end

          routes.sort_by!(&:precedence)

          routes.map! { |r|
            match_data  = r.path.match(req.path_info)
            path_parameters = r.defaults.dup
            match_data.names.zip(match_data.captures) { |name,val|
              path_parameters[name.to_sym] = Utils.unescape_uri(val) if val
            }
            [match_data, path_parameters, r]
          }
        end