use the request object since we have it

stop hardcoding hash keys and use the accessors provided on the request
object.

actionpack/lib/action_dispatch/journey/router.rb

@@ -55,17 +55,18 @@ module ActionDispatch
       end
 
       def call(env)
-        env['PATH_INFO'] = Utils.normalize_path(env['PATH_INFO'])
-
         req = request_class.new(env)
 
+        req.path_info = Utils.normalize_path(req.path_info)
+
         find_routes(env, req).each do |match, parameters, route|
-          set_params = req.path_parameters
-          script_name, path_info = env.values_at('SCRIPT_NAME', 'PATH_INFO')
+          set_params  = req.path_parameters
+          path_info   = req.path_info
+          script_name = req.script_name
 
           unless route.path.anchored
-            env['SCRIPT_NAME'] = (script_name.to_s + match.to_s).chomp('/')
-            env['PATH_INFO']   = match.post_match
+            req.script_name = (script_name.to_s + match.to_s).chomp('/')
+            req.path_info = match.post_match
           end
 
           req.path_parameters = set_params.merge parameters
@@ -73,8 +74,8 @@ module ActionDispatch
           status, headers, body = route.app.call(env)
 
           if 'pass' == headers['X-Cascade']
-            env['SCRIPT_NAME'] = script_name
-            env['PATH_INFO']   = path_info
+            req.script_name     = script_name
+            req.path_info       = path_info
             req.path_parameters = set_params
             next
           end

actionpack/test/dispatch/routing_test.rb

@@ -3368,15 +3368,13 @@ end
 
 class TestAltApp < ActionDispatch::IntegrationTest
   class AltRequest
-    attr_accessor :path_parameters
+    attr_accessor :path_parameters, :path_info, :script_name
 
     def initialize(env)
       @path_parameters = {}
       @env = env
-    end
-
-    def path_info
-      "/"
+      @path_info = "/"
+      @script_name = ""
     end
 
     def request_method

actionpack/test/journey/router_test.rb

@@ -12,7 +12,9 @@ module ActionDispatch
       def setup
         @app       = StubDispatcher.new
         @routes    = Routes.new
-        @router    = Router.new(@routes, {})
+        @router    = Router.new(@routes, {
+          :request_class => ActionDispatch::Request
+        })
         @formatter = Formatter.new(@routes)
       end