mirror of
https://github.com/pkkid/python-plexapi
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66 lines
2.7 KiB
Python
66 lines
2.7 KiB
Python
# -*- coding: utf-8 -*-
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import json
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import threading
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from plexapi import log
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from plexapi.exceptions import Unsupported
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class AlertListener(threading.Thread):
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""" Creates a websocket connection to the PlexServer to optionally recieve alert notifications.
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These often include messages from Plex about media scans as well as updates to currently running
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Transcode Sessions. This class implements threading.Thread, therfore to start monitoring
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alerts you must call .start() on the object once it's created. When calling
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`PlexServer.startAlertListener()`, the thread will be started for you.
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In order to use this feature, you must have websocket-client installed in your Python path.
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This can be installed vis pip `pip install websocket-client`.
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Parameters:
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server (:class:`~plexapi.server.PlexServer`): PlexServer this listener is connected to.
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callback (func): Callback function to call on recieved messages. The callback function
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will be sent a single argument 'data' which will contain a dictionary of data
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recieved from the server. :samp:`def my_callback(data): ...`
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"""
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key = '/:/websockets/notifications'
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def __init__(self, server, callback=None):
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self._server = server
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self._callback = callback
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self._ws = None
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super(AlertListener, self).__init__()
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def run(self):
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# try importing websocket-client package
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try:
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import websocket
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except:
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raise Unsupported('Websocket-client package is required to use this feature.')
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# create the websocket connection
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url = self._server.url(self.key).replace('http', 'ws')
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log.info('Starting AlertListener: %s', url)
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self._ws = websocket.WebSocketApp(url,
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on_message=self._onMessage,
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on_error=self._onError)
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self._ws.run_forever()
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def stop(self):
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""" Stop the AlertListener thread. Once the notifier is stopped, it cannot be diractly
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started again. You must call :func:`plexapi.server.PlexServer.startAlertListener()`
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from a PlexServer instance.
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"""
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log.info('Stopping AlertListener.')
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self._ws.close()
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def _onMessage(self, ws, message):
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""" Called when websocket message is recieved. """
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try:
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data = json.loads(message)['NotificationContainer']
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log.debug('Alert: %s', data)
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if self._callback:
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self._callback(data)
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except Exception as err:
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log.error('AlertListener Msg Error: %s', err)
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def _onError(self, ws, err):
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""" Called when websocket error is recieved. """
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log.error('AlertListener Error: %s' % err)
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