find_routes

# File actionpack/lib/action_dispatch/journey/router.rb, line 128
        def find_routes env
          req = request_class.new(env)

          routes = filter_routes(req.path_info).concat custom_routes.find_all { |r|
            r.path.match(req.path_info)
          }
          routes.concat get_routes_as_head(routes)

          routes.sort_by!(&:precedence).select! { |r| r.matches?(req) }

          routes.map! { |r|
            match_data  = r.path.match(req.path_info)
            match_names = match_data.names.map { |n| n.to_sym }
            match_values = match_data.captures.map { |v| v && Utils.unescape_uri(v) }
            info = Hash[match_names.zip(match_values).find_all { |_, y| y }]

            [match_data, r.defaults.merge(info), r]
          }
        end