paraproxio.py 文件源码

def get_file_head(self, url: str) -> Optional[CIMultiDictProxy]:
        """Make a HEAD request to get a 'content-length' and 'accept-ranges' headers."""
        self.log_debug('Getting a HEAD for url: {!s}.'.format(url))
        try:
            async with aiohttp.ClientSession(loop=self._loop) as session:
                async with session.request(hdrs.METH_HEAD, url) as res:  # type: aiohttp.ClientResponse
                    return res.headers
        except Exception as exc:
            self.log_debug("Could not get a HEAD for the {!r}. Error: {!r}.".format(url, exc))
        return None