common.py 文件源码

def _get_login_info(self):
        """
        Get the login info as (username, password)
        It will look in the netrc file using the _NETRC_MACHINE value
        If there's no info available, return (None, None)
        """
        if self._downloader is None:
            return (None, None)

        username = None
        password = None
        downloader_params = self._downloader.params

        # Attempt to use provided username and password or .netrc data
        if downloader_params.get('username', None) is not None:
            username = downloader_params['username']
            password = downloader_params['password']
        elif downloader_params.get('usenetrc', False):
            try:
                info = netrc.netrc().authenticators(self._NETRC_MACHINE)
                if info is not None:
                    username = info[0]
                    password = info[2]
                else:
                    raise netrc.NetrcParseError('No authenticators for %s' % self._NETRC_MACHINE)
            except (IOError, netrc.NetrcParseError) as err:
                self._downloader.report_warning('parsing .netrc: %s' % error_to_compat_str(err))

        return (username, password)