PlexKodiConnect/resources/lib/websocket_client.py
2016-12-27 17:33:52 +01:00

192 lines
6.8 KiB
Python

# -*- coding: utf-8 -*-
###############################################################################
import logging
import websocket
from json import loads
from threading import Thread
from Queue import Queue
from ssl import CERT_NONE
from xbmc import sleep
from utils import window, settings, ThreadMethodsAdditionalSuspend, \
ThreadMethods
###############################################################################
log = logging.getLogger("PLEX."+__name__)
###############################################################################
@ThreadMethodsAdditionalSuspend('suspend_LibraryThread')
@ThreadMethods
class WebSocket(Thread):
opcode_data = (websocket.ABNF.OPCODE_TEXT, websocket.ABNF.OPCODE_BINARY)
def __init__(self, callback=None):
if callback is not None:
self.mgr = callback
self.ws = None
# Communication with librarysync
self.queue = Queue()
Thread.__init__(self)
def process(self, opcode, message):
if opcode not in self.opcode_data:
return False
try:
message = loads(message)
except Exception as ex:
log.error('Error decoding message from websocket: %s' % ex)
log.error(message)
return False
try:
message = message['NotificationContainer']
except KeyError:
log.error('Could not parse PMS message: %s' % message)
return False
# Triage
typus = message.get('type')
if typus is None:
log.error('No message type, dropping message: %s' % message)
return False
log.debug('Received message from PMS server: %s' % message)
# Drop everything we're not interested in
if typus not in ('playing', 'timeline'):
return True
# Put PMS message on queue and let libsync take care of it
self.queue.put(message)
return True
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):
server = window('pms_server')
# Need to use plex.tv token, if any. NOT user token
token = window('plex_token')
# 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
if token:
uri += '?X-Plex-Token=%s' % token
sslopt = {}
if settings('sslverify') == "false":
sslopt["cert_reqs"] = CERT_NONE
log.debug("Uri: %s, sslopt: %s" % (uri, sslopt))
return uri, sslopt
def run(self):
log.info("----===## Starting WebSocketClient ##===----")
counter = 0
handshake_counter = 0
threadStopped = self.threadStopped
threadSuspended = self.threadSuspended
while not threadStopped():
# In the event the server goes offline
while threadSuspended():
# Set in service.py
if self.ws is not None:
try:
self.ws.shutdown()
except:
pass
self.ws = None
if threadStopped():
# Abort was requested while waiting. We should exit
log.info("##===---- WebSocketClient Stopped ----===##")
return
sleep(1000)
try:
self.process(*self.receive(self.ws))
except websocket.WebSocketTimeoutException:
# No worries if read timed out
pass
except websocket.WebSocketConnectionClosedException:
log.info("Connection closed, (re)connecting")
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("Error connecting")
self.ws = None
counter += 1
if counter > 3:
log.warn("Repeatedly could not connect to PMS, "
"declaring the connection dead")
window('plex_online', value='false')
counter = 0
sleep(1000)
except websocket.WebSocketTimeoutException:
log.info("timeout while connecting, trying again")
self.ws = None
sleep(1000)
except websocket.WebSocketException as e:
log.info('WebSocketException: %s' % e)
if 'Handshake Status 401' in e.args:
handshake_counter += 1
if handshake_counter >= 5:
log.info('Error in handshake detected. Stopping '
'WebSocketClient now')
break
self.ws = None
sleep(1000)
except Exception as e:
log.error("Unknown exception encountered in connecting: %s"
% e)
import traceback
log.error("Traceback:\n%s" % traceback.format_exc())
self.ws = None
sleep(1000)
else:
counter = 0
handshake_counter = 0
except Exception as e:
log.error("Unknown exception encountered: %s" % e)
try:
self.ws.shutdown()
except:
pass
self.ws = None
log.info("##===---- WebSocketClient Stopped ----===##")
def stopThread(self):
"""
Overwrite this method from ThreadMethods to close websockets
"""
log.info("Stopping websocket client thread.")
self._threadStopped = True
try:
self.ws.shutdown()
except:
pass