def head(status, options = {})
      if status.is_a?(Hash)
        raise ArgumentError, "#{status.inspect} is not a valid value for `status`."
      end

      status ||= :ok

      location = options.delete(:location)
      content_type = options.delete(:content_type)

      options.each do |key, value|
        headers[key.to_s.dasherize.split("-").each { |v| v[0] = v[0].chr.upcase }.join("-")] = value.to_s
      end

      self.status = status
      self.location = url_for(location) if location

      self.response_body = ""

      if include_content?(response_code)
        self.content_type = content_type || (Mime[formats.first] if formats) || Mime[:html]
        response.charset = false
      end

      true
    end
def head(status, options = {})
      if status.is_a?(Hash)
        raise ArgumentError, "#{status.inspect} is not a valid value for `status`."
      end

      status ||= :ok

      location = options.delete(:location)
      content_type = options.delete(:content_type)

      options.each do |key, value|
        headers[key.to_s.dasherize.split("-").each { |v| v[0] = v[0].chr.upcase }.join("-")] = value.to_s
      end

      self.status = status
      self.location = url_for(location) if location

      self.response_body = ""

      if include_content?(response_code)
        self.content_type = content_type || (Mime[formats.first] if formats) || Mime[:html]
        response.charset = false
      end

      true
    end
Returns a response that has no content (merely headers). The options
 argument is interpreted to be a hash of header names and values.
 This allows you to easily return a response that consists only of
 significant headers:

   head :created, location: person_path(@person)

   head :created, location: @person

 It can also be used to return exceptional conditions:

   return head(:method_not_allowed) unless request.post?
   return head(:bad_request) unless valid_request?
   render

 See Rack::Utils::SYMBOL_TO_STATUS_CODE for a full list of valid +status+ symbols.