Coerce all out going body parts to Strings

2 files changed, 30 insertions, 0 deletions

diff --git a/actionpack/lib/action_dispatch.rb b/actionpack/lib/action_dispatch.rb
index 38aaa6146e..11cd812695 100644
--- a/actionpack/lib/action_dispatch.rb
+++ b/actionpack/lib/action_dispatch.rb
@@ -39,6 +39,7 @@ module ActionDispatch
   autoload :Rescue, 'action_dispatch/middleware/rescue'
   autoload :ShowExceptions, 'action_dispatch/middleware/show_exceptions'
   autoload :Static, 'action_dispatch/middleware/static'
+  autoload :StringCoercion, 'action_dispatch/middleware/string_coercion'
 
   autoload :Assertions, 'action_dispatch/testing/assertions'
   autoload :Integration, 'action_dispatch/testing/integration'
diff --git a/actionpack/lib/action_dispatch/middleware/string_coercion.rb b/actionpack/lib/action_dispatch/middleware/string_coercion.rb
new file mode 100644
index 0000000000..232e947835
--- /dev/null
+++ b/actionpack/lib/action_dispatch/middleware/string_coercion.rb
@@ -0,0 +1,29 @@
+module ActionDispatch
+  class StringCoercion
+    class UglyBody < ActiveSupport::BasicObject
+      def initialize(body)
+        @body = body
+      end
+
+      def each
+        @body.each do |part|
+          yield part.to_s
+        end
+      end
+
+      private
+        def method_missing(*args, &block)
+          @body.__send__(*args, &block)
+        end
+    end
+
+    def initialize(app)
+      @app = app
+    end
+
+    def call(env)
+      status, headers, body = @app.call(env)
+      [status, headers, UglyBody.new(body)]
+    end
+  end
+end