added some basic structures

lib/zero/controller.rb

@@ -0,0 +1,13 @@
+module Zero
+
+  # abstract class to make creation of controllers easier
+  #
+  # This abstract class creates an interface to make it easier to write
+  # rack compatible controllers. It catches #call and creates a new instance
+  # with the environment and calls #render on it.
+  class Controller
+    def self << call(env)
+      new(Request.new(env)).render
+    end
+  end
+end

lib/zero/request.rb

@@ -0,0 +1,11 @@
+module Zero
+  # encapsulate the rack environment
+  class Request
+    attr_reader :env
+
+    # create a new 
+    def initialize(env)
+      @env = env
+    end
+  end
+end

lib/zero/response.rb

@@ -0,0 +1,22 @@
+module Zero
+  # an easier interface for the response
+  #
+  # The response for rack has to be an array of three elements. This class makes
+  # it easier to fill all the needed data.
+  class Response
+    attr_reader :code, :header, :body
+
+    # init a new response
+    def initialize
+      @code   = 404
+      @header = {}
+      @body   = nil
+    end
+
+    # builds the response for rack and checks for protocol errors
+    # @return Array the rack response
+    def response
+
+    end
+  end
+end