module ActionController::Rendering

def _normalize_args(action=nil, options={}, &blk) #:nodoc:

:nodoc:
Normalize arguments by catching blocks and setting them on :update. 
def _normalize_args(action=nil, options={}, &blk) #:nodoc:
  options = super
  options[:update] = blk if block_given?
  options
end

def _normalize_options(options) #:nodoc:

:nodoc:
Normalize both text and status options. 
def _normalize_options(options) #:nodoc:
  if options.key?(:text) && options[:text].respond_to?(:to_text)
    options[:text] = options[:text].to_text
  end
  if options.delete(:nothing) || (options.key?(:text) && options[:text].nil?)
    options[:text] = " "
  end
  if options[:status]
    options[:status] = Rack::Utils.status_code(options[:status])
  end
  super
end

def _process_options(options) #:nodoc:

:nodoc:
Process controller specific options, as status, content-type and location. 
def _process_options(options) #:nodoc:
  status, content_type, location = options.values_at(:status, :content_type, :location)
  self.status = status if status
  self.content_type = content_type if content_type
  self.headers["Location"] = url_for(location) if location
  super
end

def process_action(*) #:nodoc:

:nodoc:
Before processing, set the request formats in current controller formats. 
def process_action(*) #:nodoc:
  self.formats = request.formats.map(&:ref).compact
  super
end

def render(*args) #:nodoc:

:nodoc:
Check for double render errors and set the content_type after rendering. 
def render(*args) #:nodoc:
  raise ::AbstractController::DoubleRenderError if response_body
  super
  self.content_type ||= Mime[lookup_context.rendered_format].to_s
  response_body
end

def render_to_body(*) 

def render_to_body(*)
  super || " "
end

def render_to_string(*)

Overwrite render_to_string because body can now be set to a rack body. 
def render_to_string(*)
  if self.response_body = super
    string = ""
    response_body.each { |r| string << r }
    string
  end
ensure
  self.response_body = nil
end