root / ncclient / listeners.py @ 2acc860a
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# Copyright 2009 Shikhar Bhushan
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import logging |
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from weakref import WeakValueDictionary |
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import content |
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logger = logging.getLogger('ncclient.listeners')
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session_listeners = {} |
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def session_listener_factory(session): |
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try:
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return session_listeners[session]
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except KeyError: |
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session_listeners[session] = SessionListener() |
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return session_listeners[session]
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class SessionListener(object): |
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def __init__(self): |
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self._id2rpc = WeakValueDictionary()
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self._expecting_close = False |
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sself._notification_rpc_id = None
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def __str__(self): |
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return 'SessionListener' |
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def expect_close(self): |
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self._expecting_close = True |
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def register(self, id, op): |
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self._id2rpc[id] = op |
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### Events
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def reply(self, raw): |
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try:
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id = content.parse_message_root(raw) |
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if id is None: |
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pass
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elif id == 'notification': |
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self._id2rpc[self._sub_id]._notify(raw) |
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else:
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self._id2rpc[id]._response_cb(raw) |
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except Exception as e: |
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logger.warning(e) |
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def error(self, err): |
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from ssh import SessionCloseError |
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if err is SessionCloseError: |
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logger.debug('received session close, expecting_close=%s' %
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self._expecting_close)
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if not self._expecting_close: |
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raise err
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class HelloListener: |
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def __str__(self): |
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return 'HelloListener' |
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def __init__(self, session): |
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self._session = session
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def reply(self, data): |
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try:
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id, capabilities = content.Hello.parse(data)
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logger.debug('HelloListener: session_id: %s; capabilities: %s', id, capabilities) |
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self._session.initialize(id, capabilities) |
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except Exception as e: |
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self._session.initialize_error(e)
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def error(self, err): |
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self._session.initialize_error(err)
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class DebugListener: |
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def __str__(self): |
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return 'DebugListener' |
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def reply(self, raw): |
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logger.debug('DebugListener:reply:\n%s' % raw)
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def error(self, err): |
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logger.debug('DebugListener:error:\n%s' % err)
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