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.

from xml.etree import cElementTree as ET

from ncclient.content import multiqualify as _

from ncclient.content import unqualify as __

import logging

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

class RPCReply:

    def __init__(self, raw):

        self._raw = raw

        self._parsed = False

        self._errors = []

    def __repr__(self):

        return self._raw

    def parse(self):

        if self._parsed: return

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

        if __(root.tag) != 'rpc-reply':

            raise ValueError('Root element is not RPC reply')

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

        oktags = _('ok')

        for oktag in oktags:

            if root.find(oktag) is not None:

                logger.debug('parsed [%s]' % oktag)

                self._parsed = True

                return

        # create RPCError objects from <rpc-error> elements

        errtags = _('rpc-error')

        for errtag in errtags:

            for err in root.getiterator(errtag): # a particular <rpc-error>

                logger.debug('parsed [%s]' % errtag)

                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))

            if self._errors:

                break

        self._parsed = True

    @property

    def raw(self):

        return self._raw

    @property

    def ok(self):

        if not self._parsed: self.parse()

        return not self._errors # empty list => false

    @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(Exception): # raise it if you like

    def __init__(self, err_dict):

        self._dict = err_dict

        if self.message is not None:

            Exception.__init__(self, self.message)

        else:

            Exception.__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)