config.py 文件源码

def maybe_download_ca_cert(self, ignored, replace=False):
        """
        :rtype: deferred
        """
        # TODO: doesn't update the cert :((((
        enc_domain = self._domain.encode(sys.getfilesystemencoding())
        path = os.path.join(self._basedir, 'providers', enc_domain, 'keys',
                            'ca', 'cacert.pem')
        if not replace and is_file(path):
            return defer.succeed('ca_cert_path_already_exists')

        def errback(failure):
            raise NetworkError(failure.getErrorMessage())

        uri = self._get_ca_cert_uri()
        mkdir_p(os.path.split(path)[0])

        # We don't validate the TLS cert for this connection,
        # just check the fingerprint of the ca.cert
        d = downloadPage(uri, path)
        d.addCallback(self._reload_http_client)
        d.addErrback(errback)
        return d