return self

    def __next__(self):

        chunk = self._next()

        self._meter.measure(chunk)

        return chunk

    def close(self):

        self._result_close()

        log.info("%s responded %r after %.3fs with %s bytes", self._description, self._meter.status, self._meter.duration(), self._meter.size())

class RequestWrapper(object):

    def __init__(self, app, config):

        self.application = app

        self.config = config

    def __call__(self, environ, start_response):

        meter = Meter(start_response)

        description = "Request from %s for %s" % (

            _get_ip_addr(environ),

            get_path_info(environ),

        )

        try:

            result = self.application(environ, meter.start_response)

        finally:

            log.info("%s responding %r after %.3fs", description, meter.status, meter.duration())

        return ResultIter(result, meter, description)