community.general/lib/ansible/module_utils/network/common/netconf.py

# This code is part of Ansible, but is an independent component.
# This particular file snippet, and this file snippet only, is BSD licensed.
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# still belong to the author of the module, and may assign their own license
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# (c) 2017 Red Hat Inc.
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# are permitted provided that the following conditions are met:
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import sys

from ansible.module_utils._text import to_text, to_native
from ansible.module_utils.connection import Connection, ConnectionError

try:
    from lxml.etree import Element, fromstring, XMLSyntaxError
except ImportError:
    from xml.etree.ElementTree import Element, fromstring
    if sys.version_info < (2, 7):
        from xml.parsers.expat import ExpatError as XMLSyntaxError
    else:
        from xml.etree.ElementTree import ParseError as XMLSyntaxError

NS_MAP = {'nc': "urn:ietf:params:xml:ns:netconf:base:1.0"}


def exec_rpc(module, *args, **kwargs):
    connection = NetconfConnection(module._socket_path)
    return connection.execute_rpc(*args, **kwargs)


class NetconfConnection(Connection):

    def __init__(self, socket_path):
        super(NetconfConnection, self).__init__(socket_path)

    def __rpc__(self, name, *args, **kwargs):
        """Executes the json-rpc and returns the output received
           from remote device.
           :name: rpc method to be executed over connection plugin that implements jsonrpc 2.0
           :args: Ordered list of params passed as arguments to rpc method
           :kwargs: Dict of valid key, value pairs passed as arguments to rpc method

           For usage refer the respective connection plugin docs.
        """
        self.check_rc = kwargs.pop('check_rc', True)
        self.ignore_warning = kwargs.pop('ignore_warning', True)

        response = self._exec_jsonrpc(name, *args, **kwargs)
        if 'error' in response:
            rpc_error = response['error'].get('data')
            return self.parse_rpc_error(to_native(rpc_error, errors='surrogate_then_replace'))

        return fromstring(to_native(response['result'], errors='surrogate_then_replace'))

    def parse_rpc_error(self, rpc_error):
        if self.check_rc:
            try:
                error_root = fromstring(rpc_error)
                root = Element('root')
                root.append(error_root)

                error_list = root.findall('.//nc:rpc-error', NS_MAP)
                if not error_list:
                    raise ConnectionError(to_text(rpc_error, errors='surrogate_then_replace'))

                warnings = []
                for error in error_list:
                    try:
                        message = error.find('./nc:error-message', NS_MAP).text
                    except Exception:
                        message = error.find('./nc:error-info', NS_MAP).text

                    severity = error.find('./nc:error-severity', NS_MAP).text

                    if severity == 'warning' and self.ignore_warning:
                        warnings.append(message)
                    else:
                        raise ConnectionError(to_text(rpc_error, errors='surrogate_then_replace'))
                return warnings
            except XMLSyntaxError:
                raise ConnectionError(rpc_error)