ActionController::VerbPiggybacking middleware

1 files changed, 24 insertions, 0 deletions

diff --git a/actionpack/lib/action_controller/verb_piggybacking.rb b/actionpack/lib/action_controller/verb_piggybacking.rb
new file mode 100644
index 0000000000..86cde304a0
--- /dev/null
+++ b/actionpack/lib/action_controller/verb_piggybacking.rb
@@ -0,0 +1,24 @@
+module ActionController
+  # TODO: Use Rack::MethodOverride when it is released
+  class VerbPiggybacking
+    HTTP_METHODS = %w(GET HEAD PUT POST DELETE OPTIONS)
+
+    def initialize(app)
+      @app = app
+    end
+
+    def call(env)
+      if env["REQUEST_METHOD"] == "POST"
+        req = Request.new(env)
+        if method = (req.parameters[:_method] || env["HTTP_X_HTTP_METHOD_OVERRIDE"])
+          method = method.to_s.upcase
+          if HTTP_METHODS.include?(method)
+            env["REQUEST_METHOD"] = method
+          end
+        end
+      end
+
+      @app.call(env)
+    end
+  end
+end