io.py 文件源码

def _handle_http_url(self, url, headers):
        logging.debug("handle_http_url(url={}, headers={})".format(url, headers))
        before = time.time()
        start_offset = self.output.tell()
        for piece in self._stream(url, headers):
            self.output.write(piece)
        duration = time.time() - before
        # On Windows we seem to get 0 values for duration. Just round up to one second.
        # Rates over intervals less than this are meaningless anyway.
        duration = max(1, duration)
        size = self.output.tell() - start_offset
        rate = (size / (2**20)) / duration
        logging.info("Downloaded {} chunk in {:.2f} seconds @ {:.2f} MiB/s".format(
            humanize.naturalsize(size, binary=True), duration, rate))