Merge pull request rails#48845 from adrianna-chang-shopify/ac-x-casca…

…de-headers-support-proper-casing

Use Rack-compatible casing for x-cascade headers in router

actionpack/lib/action_dispatch/constants.rb

@@ -13,6 +13,7 @@ module Constants
       LOCATION = "Location"
       FEATURE_POLICY = "Feature-Policy"
       X_REQUEST_ID = "X-Request-Id"
+      X_CASCADE = "X-Cascade"
       SERVER_TIMING = "Server-Timing"
       STRICT_TRANSPORT_SECURITY = "Strict-Transport-Security"
     else
@@ -23,6 +24,7 @@ module Constants
       LOCATION = "location"
       FEATURE_POLICY = "feature-policy"
       X_REQUEST_ID = "x-request-id"
+      X_CASCADE = "x-cascade"
       SERVER_TIMING = "server-timing"
       STRICT_TRANSPORT_SECURITY = "strict-transport-security"
     end

actionpack/lib/action_dispatch/http/request.rb

@@ -72,7 +72,7 @@ def commit_cookie_jar! # :nodoc:
 
     PASS_NOT_FOUND = Class.new { # :nodoc:
       def self.action(_); self; end
-      def self.call(_); [404, { "X-Cascade" => "pass" }, []]; end
+      def self.call(_); [404, { Constants::X_CASCADE => "pass" }, []]; end
       def self.action_encoding_template(action); false; end
     }
 

actionpack/lib/action_dispatch/journey/router.rb

@@ -50,7 +50,7 @@ def serve(req)
 
           _, headers, _ = response = route.app.serve(req)
 
-          if "pass" == headers["X-Cascade"]
+          if "pass" == headers[Constants::X_CASCADE]
             req.script_name     = script_name
             req.path_info       = path_info
             req.path_parameters = set_params
@@ -60,7 +60,7 @@ def serve(req)
           return response
         end
 
-        [404, { "X-Cascade" => "pass" }, ["Not Found"]]
+        [404, { Constants::X_CASCADE => "pass" }, ["Not Found"]]
       end
 
       def recognize(rails_req)

actionpack/lib/action_dispatch/middleware/debug_exceptions.rb

@@ -28,7 +28,7 @@ def initialize(app, routes_app = nil, response_format = :default, interceptors =
     def call(env)
       _, headers, body = response = @app.call(env)
 
-      if headers["X-Cascade"] == "pass"
+      if headers[Constants::X_CASCADE] == "pass"
         body.close if body.respond_to?(:close)
         raise ActionController::RoutingError, "No route matches [#{env['REQUEST_METHOD']}] #{env['PATH_INFO'].inspect}"
       end

actionpack/lib/action_dispatch/middleware/public_exceptions.rb

@@ -55,7 +55,7 @@ def render_html(status)
         if found || File.exist?(path)
           render_format(status, "text/html", File.read(path))
         else
-          [404, { "X-Cascade" => "pass" }, []]
+          [404, { Constants::X_CASCADE => "pass" }, []]
         end
       end
   end

actionpack/lib/action_dispatch/middleware/show_exceptions.rb

@@ -50,7 +50,7 @@ def render_exception(request, wrapper)
         request.path_info = "/#{status}"
         request.request_method = "GET"
         response = @exceptions_app.call(request.env)
-        response[1]["X-Cascade"] == "pass" ? pass_response(status) : response
+        response[1][Constants::X_CASCADE] == "pass" ? pass_response(status) : response
       rescue Exception => failsafe_error
         $stderr.puts "Error during failsafe response: #{failsafe_error}\n  #{failsafe_error.backtrace * "\n  "}"
 

actionpack/lib/action_dispatch/routing/mapper.rb

@@ -46,7 +46,7 @@ def matches?(req)
         end
 
         def serve(req)
-          return [ 404, { "X-Cascade" => "pass" }, [] ] unless matches?(req)
+          return [ 404, { Constants::X_CASCADE => "pass" }, [] ] unless matches?(req)
 
           @strategy.call @app, req
         end

actionpack/lib/action_dispatch/routing/route_set.rb

@@ -34,7 +34,7 @@ def serve(req)
           if @raise_on_name_error
             raise
           else
-            [404, { "X-Cascade" => "pass" }, []]
+            [404, { Constants::X_CASCADE => "pass" }, []]
           end
         end
 

actionpack/test/controller/integration_test.rb

@@ -782,7 +782,8 @@ def self.call(*)
     get "bar", to: "application_integration_test/test#index", as: :bar
 
     mount MountedApp => "/mounted", :as => "mounted"
-    get "fooz" => proc { |env| [ 200, { "X-Cascade" => "pass" }, [ "omg" ] ] }, :anchor => false
+    get "fooz" => proc { |env| [ 200, { ActionDispatch::Constants::X_CASCADE => "pass" }, [ "omg" ] ] },
+      :anchor => false
     get "fooz", to: "application_integration_test/test#index"
   end
 

actionpack/test/dispatch/debug_exceptions_test.rb

@@ -61,7 +61,7 @@ def call(env)
 
       case req.path
       when "/pass"
-        [404, { "X-Cascade" => "pass" }, self]
+        [404, { ActionDispatch::Constants::X_CASCADE => "pass" }, self]
       when "/not_found"
         controller = SimpleController.new
         raise AbstractController::ActionNotFound.new(nil, controller, :ello)

actionpack/test/dispatch/routing_test.rb

@@ -430,19 +430,19 @@ def test_admin
     assert_equal "queenbee#index", @response.body
 
     get "/admin", headers: { "REMOTE_ADDR" => "10.0.0.100" }
-    assert_equal "pass", @response.headers["X-Cascade"]
+    assert_equal "pass", @response.headers["x-cascade"]
 
     get "/admin/accounts", headers: { "REMOTE_ADDR" => "192.168.1.100" }
     assert_equal "queenbee#accounts", @response.body
 
     get "/admin/accounts", headers: { "REMOTE_ADDR" => "10.0.0.100" }
-    assert_equal "pass", @response.headers["X-Cascade"]
+    assert_equal "pass", @response.headers["x-cascade"]
 
     get "/admin/passwords", headers: { "REMOTE_ADDR" => "192.168.1.100" }
     assert_equal "queenbee#passwords", @response.body
 
     get "/admin/passwords", headers: { "REMOTE_ADDR" => "10.0.0.100" }
-    assert_equal "pass", @response.headers["X-Cascade"]
+    assert_equal "pass", @response.headers["x-cascade"]
   end
 
   def test_global
@@ -890,13 +890,13 @@ def test_resource_routes_with_only_and_except
     assert_equal "/posts/1/comments", post_comments_path(post_id: 1)
 
     post "/posts"
-    assert_equal "pass", @response.headers["X-Cascade"]
+    assert_equal "pass", @response.headers["x-cascade"]
     put "/posts/1"
-    assert_equal "pass", @response.headers["X-Cascade"]
+    assert_equal "pass", @response.headers["x-cascade"]
     delete "/posts/1"
-    assert_equal "pass", @response.headers["X-Cascade"]
+    assert_equal "pass", @response.headers["x-cascade"]
     delete "/posts/1/comments"
-    assert_equal "pass", @response.headers["X-Cascade"]
+    assert_equal "pass", @response.headers["x-cascade"]
   end
 
   def test_resource_routes_only_create_update_destroy
@@ -1325,7 +1325,7 @@ def test_articles_with_id
     assert_equal "articles#with_id", @response.body
 
     get "/articles/123/1"
-    assert_equal "pass", @response.headers["X-Cascade"]
+    assert_equal "pass", @response.headers["x-cascade"]
 
     assert_equal "/articles/rails/1", article_with_title_path(title: "rails", id: 1)
   end
@@ -1909,7 +1909,7 @@ def test_resource_constraints
     end
 
     get "/products/1"
-    assert_equal "pass", @response.headers["X-Cascade"]
+    assert_equal "pass", @response.headers["x-cascade"]
     get "/products"
     assert_equal "products#root", @response.body
     get "/products/favorite"
@@ -1918,14 +1918,14 @@ def test_resource_constraints
     assert_equal "products#show", @response.body
 
     get "/products/1/images"
-    assert_equal "pass", @response.headers["X-Cascade"]
+    assert_equal "pass", @response.headers["x-cascade"]
     get "/products/0001/images"
     assert_equal "images#index", @response.body
     get "/products/0001/images/0001"
     assert_equal "images#show", @response.body
 
     get "/dashboard", headers: { "REMOTE_ADDR" => "10.0.0.100" }
-    assert_equal "pass", @response.headers["X-Cascade"]
+    assert_equal "pass", @response.headers["x-cascade"]
     get "/dashboard", headers: { "REMOTE_ADDR" => "192.168.1.100" }
     assert_equal "dashboards#show", @response.body
   end

actionpack/test/dispatch/show_exceptions_test.rb

@@ -117,9 +117,9 @@ def call(env)
     assert_equal "YOU FAILED", body
   end
 
-  test "returns an empty response if custom exceptions app returns X-Cascade pass" do
+  test "returns an empty response if custom exceptions app returns x-cascade pass" do
     exceptions_app = lambda do |env|
-      [404, { "X-Cascade" => "pass" }, []]
+      [404, { ActionDispatch::Constants::X_CASCADE => "pass" }, []]
     end
 
     @app = ActionDispatch::ShowExceptions.new(Boomer.new, exceptions_app)

actionpack/test/journey/router_test.rb

@@ -110,11 +110,11 @@ def test_does_not_include_missing_keys_message
         assert_no_match(/missing required keys: \[\]/, error.message)
       end
 
-      def test_X_Cascade
+      def test_x_cascade
         get "/messages(.:format)", to: "foo#bar"
         resp = router.serve(rails_env("REQUEST_METHOD" => "GET", "PATH_INFO" => "/lol"))
         assert_equal ["Not Found"], resp.last
-        assert_equal "pass", resp[1]["X-Cascade"]
+        assert_equal "pass", resp[1][Constants::X_CASCADE]
         assert_equal 404, resp.first
       end