# File actionpack/lib/action_dispatch/http/response.rb, line 42
def initialize(status = 200, header = {}, body = [])
  @writer = lambda { |x| @body << x }
  @block = nil
  @length = 0

  @status, @header = status, header
  self.body = body

  @cookie = []
  @sending_file = false

  @blank = false

  if content_type = self["Content-Type"]
    type, charset = content_type.split(/;\s*charset=/)
    @content_type = Mime::Type.lookup(type)
    @charset = charset || "UTF-8"
  end

  yield self if block_given?
end