PlexKodiConnect/resources/lib/websocket_client.py
2019-02-21 08:47:36 +01:00

262 lines
10 KiB
Python

#!/usr/bin/env python
# -*- coding: utf-8 -*-
from logging import getLogger
from json import loads
from ssl import CERT_NONE
from . import backgroundthread, websocket, utils, companion, app, variables as v
###############################################################################
LOG = getLogger('PLEX.websocket_client')
###############################################################################
class WebSocket(backgroundthread.KillableThread):
opcode_data = (websocket.ABNF.OPCODE_TEXT, websocket.ABNF.OPCODE_BINARY)
def __init__(self):
self.ws = None
self.redirect_uri = None
super(WebSocket, self).__init__()
def process(self, opcode, message):
raise NotImplementedError
def receive(self, ws):
# Not connected yet
if ws is None:
raise websocket.WebSocketConnectionClosedException
frame = ws.recv_frame()
if not frame:
raise websocket.WebSocketException("Not a valid frame %s" % frame)
elif frame.opcode in self.opcode_data:
return frame.opcode, frame.data
elif frame.opcode == websocket.ABNF.OPCODE_CLOSE:
ws.send_close()
return frame.opcode, None
elif frame.opcode == websocket.ABNF.OPCODE_PING:
ws.pong("Hi!")
return None, None
def getUri(self):
raise NotImplementedError
def run(self):
LOG.info("----===## Starting %s ##===----", self.__class__.__name__)
app.APP.register_thread(self)
try:
self._run()
finally:
# Close websocket connection on shutdown
if self.ws is not None:
self.ws.close()
app.APP.deregister_thread(self)
LOG.info("##===---- %s Stopped ----===##", self.__class__.__name__)
def _run(self):
counter = 0
while not self.isCanceled():
# In the event the server goes offline
if self.isSuspended():
# Set in service.py
if self.ws is not None:
self.ws.close()
self.ws = None
if self.wait_while_suspended():
# Abort was requested while waiting. We should exit
LOG.info("##===---- %s Stopped ----===##",
self.__class__.__name__)
return
try:
self.process(*self.receive(self.ws))
except websocket.WebSocketTimeoutException:
# No worries if read timed out
pass
except websocket.WebSocketConnectionClosedException:
LOG.info("%s: connection closed, (re)connecting",
self.__class__.__name__)
uri, sslopt = self.getUri()
try:
# Low timeout - let's us shut this thread down!
self.ws = websocket.create_connection(
uri,
timeout=1,
sslopt=sslopt,
enable_multithread=True)
except IOError:
# Server is probably offline
LOG.info("%s: Error connecting", self.__class__.__name__)
self.ws = None
counter += 1
if counter >= 10:
LOG.info('%s: Repeated IOError detected. Stopping now',
self.__class__.__name__)
break
app.APP.monitor.waitForAbort(1)
except websocket.WebSocketTimeoutException:
LOG.info("%s: Timeout while connecting, trying again",
self.__class__.__name__)
self.ws = None
app.APP.monitor.waitForAbort(1)
except websocket.WebsocketRedirect as e:
LOG.info('301 redirect detected')
self.redirect_uri = e.headers.get('location', e.headers.get('Location'))
if self.redirect_uri:
self.redirect_uri.decode('utf-8')
counter += 1
if counter >= 10:
LOG.info('%s: Repeated WebsocketRedirect detected. Stopping now',
self.__class__.__name__)
break
except websocket.WebSocketException as e:
LOG.info('%s: WebSocketException: %s',
self.__class__.__name__, e)
if ('Handshake Status 401' in e.args or
'Handshake Status 403' in e.args):
counter += 1
if counter >= 5:
LOG.info('%s: Error in handshake detected. '
'Stopping now', self.__class__.__name__)
break
self.ws = None
app.APP.monitor.waitForAbort(1)
except Exception as e:
LOG.error('%s: Unknown exception encountered when '
'connecting: %s', self.__class__.__name__, e)
import traceback
LOG.error("%s: Traceback:\n%s",
self.__class__.__name__, traceback.format_exc())
self.ws = None
app.APP.monitor.waitForAbort(1)
else:
counter = 0
except Exception as e:
LOG.error("%s: Unknown exception encountered: %s",
self.__class__.__name__, e)
import traceback
LOG.error("%s: Traceback:\n%s",
self.__class__.__name__, traceback.format_exc())
if self.ws is not None:
self.ws.close()
self.ws = None
class PMS_Websocket(WebSocket):
"""
Websocket connection with the PMS for Plex Companion
"""
def isSuspended(self):
"""
Returns True if the thread is suspended
"""
return self._suspended or app.SYNC.background_sync_disabled
def getUri(self):
if self.redirect_uri:
uri = self.redirect_uri
self.redirect_uri = None
else:
server = app.CONN.server
# Get the appropriate prefix for the websocket
if server.startswith('https'):
server = "wss%s" % server[5:]
else:
server = "ws%s" % server[4:]
uri = "%s/:/websockets/notifications" % server
# Need to use plex.tv token, if any. NOT user token
if app.ACCOUNT.plex_token:
uri += '?X-Plex-Token=%s' % app.ACCOUNT.plex_token
sslopt = {}
if v.KODIVERSION == 17 and utils.settings('sslverify') == "false":
sslopt["cert_reqs"] = CERT_NONE
LOG.debug("%s: Uri: %s, sslopt: %s",
self.__class__.__name__, uri, sslopt)
return uri, sslopt
def process(self, opcode, message):
if opcode not in self.opcode_data:
return
try:
message = loads(message)
except ValueError:
LOG.error('%s: Error decoding message from websocket',
self.__class__.__name__)
LOG.error(message)
return
try:
message = message['NotificationContainer']
except KeyError:
LOG.error('%s: Could not parse PMS message: %s',
self.__class__.__name__, message)
return
# Triage
typus = message.get('type')
if typus is None:
LOG.error('%s: No message type, dropping message: %s',
self.__class__.__name__, message)
return
LOG.debug('%s: Received message from PMS server: %s',
self.__class__.__name__, message)
# Drop everything we're not interested in
if typus not in ('playing', 'timeline', 'activity'):
return
else:
# Put PMS message on queue and let libsync take care of it
app.APP.websocket_queue.put(message)
class Alexa_Websocket(WebSocket):
"""
Websocket connection to talk to Amazon Alexa.
"""
def isSuspended(self):
"""
Overwrite method since we need to check for plex token
"""
return (self._suspended or
not app.ACCOUNT.plex_token or
app.ACCOUNT.restricted_user)
def getUri(self):
if self.redirect_uri:
uri = self.redirect_uri
self.redirect_uri = None
else:
uri = ('wss://pubsub.plex.tv/sub/websockets/%s/%s?X-Plex-Token=%s'
% (app.ACCOUNT.plex_user_id,
v.PKC_MACHINE_IDENTIFIER,
app.ACCOUNT.plex_token))
sslopt = {}
LOG.debug("%s: Uri: %s, sslopt: %s",
self.__class__.__name__, uri, sslopt)
return uri, sslopt
def process(self, opcode, message):
if opcode not in self.opcode_data:
return
LOG.debug('%s: Received the following message from Alexa:',
self.__class__.__name__)
LOG.debug('%s: %s', self.__class__.__name__, message)
try:
message = utils.defused_etree.fromstring(message)
except Exception as ex:
LOG.error('%s: Error decoding message from Alexa: %s',
self.__class__.__name__, ex)
return
try:
if message.attrib['command'] == 'processRemoteControlCommand':
message = message[0]
else:
LOG.error('%s: Unknown Alexa message received',
self.__class__.__name__)
return
except Exception:
LOG.error('%s: Could not parse Alexa message',
self.__class__.__name__)
return
companion.process_command(message.attrib['path'][1:], message.attrib)