class Rack::Response

def finish(&block)

Returns:
  • (Array) - a 3-tuple suitable of `[status, headers, body]` 
def finish(&block)
  if STATUS_WITH_NO_ENTITY_BODY[status.to_i]
    delete_header CONTENT_TYPE
    delete_header CONTENT_LENGTH
    close
    return [@status, @headers, []]
  else
    if block_given?
      @block = block
      return [@status, @headers, self]
    else
      return [@status, @headers, @body]
    end
  end
end