core.py 文件源码

def touch(self, path, acl="", **kwargs):
        """
        Create empty key

        If path is a bucket only, attempt to create bucket.
        """
        bucket, key = split_path(path)
        acl = acl or self.s3_additional_kwargs.get('ACL', '')
        if key:
            if acl and acl not in key_acls:
                raise ValueError('ACL not in %s', key_acls)
            self._call_s3(
                self.s3.put_object, kwargs,
                Bucket=bucket, Key=key, ACL=acl)
            self.invalidate_cache(path)
        else:
            if acl and acl not in buck_acls:
                raise ValueError('ACL not in %s', buck_acls)
            try:
                self.s3.create_bucket(Bucket=bucket, ACL=acl)
                self.invalidate_cache('')
                self.invalidate_cache(bucket)
            except (ClientError, ParamValidationError):
                raise IOError('Bucket create failed', path)