1 files changed, 50 insertions, 0 deletions
diff --git a/actionpack/lib/action_dispatch/middleware/debug_view.rb b/actionpack/lib/action_dispatch/middleware/debug_view.rb
new file mode 100644
index 0000000000..ac12dc13a1
--- /dev/null
+++ b/actionpack/lib/action_dispatch/middleware/debug_view.rb
@@ -0,0 +1,50 @@
+# frozen_string_literal: true
+
+require "pp"
+
+require "action_view"
+require "action_view/base"
+
+module ActionDispatch
+  class DebugView < ActionView::Base # :nodoc:
+    RESCUES_TEMPLATE_PATH = File.expand_path("templates", __dir__)
+
+    def initialize(assigns)
+      super([RESCUES_TEMPLATE_PATH], assigns)
+    end
+
+    def debug_params(params)
+      clean_params = params.clone
+      clean_params.delete("action")
+      clean_params.delete("controller")
+
+      if clean_params.empty?
+        "None"
+      else
+        PP.pp(clean_params, +"", 200)
+      end
+    end
+
+    def debug_headers(headers)
+      if headers.present?
+        headers.inspect.gsub(",", ",\n")
+      else
+        "None"
+      end
+    end
+
+    def debug_hash(object)
+      object.to_hash.sort_by { |k, _| k.to_s }.map { |k, v| "#{k}: #{v.inspect rescue $!.message}" }.join("\n")
+    end
+
+    def render(*)
+      logger = ActionView::Base.logger
+
+      if logger && logger.respond_to?(:silence)
+        logger.silence { super }
+      else
+        super
+      end
+    end
+  end
+end