'@param headers: The headers for this response.  If L{None}, an empty
L{Headers} instance will be used.
@type headers: L{Headers}
@param transportFactory: A callable used to construct the transport.'

def __init__(self, headers=None, transportFactory=AbortableStringTransport):

    if (headers is None):
        headers = Headers()
    self.headers = headers
    self.transport = transportFactory()
