Introduce Rails Metal

  # app/metal/poller.rb
  class Poller < Rails::Rack::Metal
    def call(env)
      if env["PATH_INFO"] =~ /^\/poller/
        [200, {"Content-Type" => "application/json"}, Message.recent.to_json]
      else
        super
      end
    end
  end

* There is a generator to help you get started
    `script/generate metal poller`

* Also, metal bits can be ran standalone with rackup
    `rackup app/metal/poller.rb`

1 files changed, 21 insertions, 0 deletions

diff --git a/railties/lib/rails/rack/metal.rb b/railties/lib/rails/rack/metal.rb
new file mode 100644
index 0000000000..8dfbedad90
--- /dev/null
+++ b/railties/lib/rails/rack/metal.rb
@@ -0,0 +1,21 @@
+module Rails
+  module Rack
+    class Metal
+      NotFound = lambda { |env|
+        [404, {"Content-Type" => "text/html"}, "Not Found"]
+      }
+
+      def self.call(env)
+        new(NotFound).call(env)
+      end
+
+      def initialize(app)
+        @app = app
+      end
+
+      def call(env)
+        @app.call(env)
+      end
+    end
+  end
+end