ncclient:NETCONF Python client

# Copyright 2009 Shikhar Bhushan

#

# Licensed under the Apache License, Version 2.0 (the "License");

# you may not use this file except in compliance with the License.

# You may obtain a copy of the License at

#

#    http://www.apache.org/licenses/LICENSE-2.0

#

# Unless required by applicable law or agreed to in writing, software

# distributed under the License is distributed on an "AS IS" BASIS,

# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

# See the License for the specific language governing permissions and

# limitations under the License.

import ncclient

from xml.etree import cElementTree as ET

from ncclient.content import namespaced_find

from ncclient.content import unqualify as __

import logging

logger = logging.getLogger('ncclient.rpc.reply')

class RPCReply:

    'NOTES: memory considerations?? storing both raw xml + ET.Element'

    def __init__(self, raw):

        self._raw = raw

        self._parsed = False

        self._root = None

        self._errors = []

    def __repr__(self):

        return self._raw

    def parse(self):

        if self._parsed: return

        root = self._root = ET.fromstring(self._raw) # <rpc-reply> element

        # per rfc 4741 an <ok/> tag is sent when there are no errors or warnings

        ok = namespaced_find(root, 'ok')

        if ok is not None:

            logger.debug('parsed [%s]' % ok.tag)

        else: # create RPCError objects from <rpc-error> elements

            error = namespaced_find(root, 'rpc-error')

            if error is not None:

                logger.debug('parsed [%s]' % error.tag)

                for err in root.getiterator(error.tag):

                    # process a particular <rpc-error>

                    d = {}

                    for err_detail in err.getchildren(): # <error-type> etc..

                        tag = __(err_detail.tag)

                        d[tag] = (err_detail.text.strip() if tag != 'error-info'

                                  else ET.tostring(err_detail, 'utf-8'))

                    self._errors.append(RPCError(d))

        self._parsing_hook(root)

        self._parsed = True

    def extract_subtree_xml(self):

        return ''.join([ET.tostring(ele)

                        for ele in ET.fromstring(self.xml).getchildren()])

    @property

    def xml(self):

        '<rpc-reply> as returned'

        return self._raw

    @property

    def ok(self):

        if not self._parsed: self.parse()

        return not self._errors # empty list => false

    @property

    def error(self):

        if not self._parsed: self.parse()

        if self._errors:

            return self._errors[0]

        else:

            return None

    @property

    def errors(self):

        'List of RPCError objects. Will be empty if no <rpc-error> elements in reply.'

        if not self._parsed: self.parse()

        return self._errors

class RPCError(ncclient.RPCError): # raise it if you like

    def __init__(self, err_dict):

        self._dict = err_dict

        if self.message is not None:

            ncclient.RPCError.__init__(self, self.message)

        else:

            ncclient.RPCError.__init__(self)

    @property

    def raw(self):

        return self._element.tostring()

    @property

    def type(self):

        return self.get('error-type', None)

    @property

    def severity(self):

        return self.get('error-severity', None)

    @property

    def tag(self):

        return self.get('error-tag', None)

    @property

    def path(self):

        return self.get('error-path', None)

    @property

    def message(self):

        return self.get('error-message', None)

    @property

    def info(self):

        return self.get('error-info', None)

    ## dictionary interface

    __getitem__ = lambda self, key: self._dict.__getitem__(key)

    __iter__ = lambda self: self._dict.__iter__()

    __contains__ = lambda self, key: self._dict.__contains__(key)

    keys = lambda self: self._dict.keys()

    get = lambda self, key, default: self._dict.get(key, default)

    iteritems = lambda self: self._dict.iteritems()

    iterkeys = lambda self: self._dict.iterkeys()

    itervalues = lambda self: self._dict.itervalues()

    values = lambda self: self._dict.values()

    items = lambda self: self._dict.items()

    __repr__ = lambda self: repr(self._dict)