PlexKodiConnect/resources/lib/websocket_client.py

173 lines
5.9 KiB
Python

# -*- coding: utf-8 -*-
###############################################################################
import json
import threading
import Queue
import websocket
import ssl
import xbmc
import utils
###############################################################################
@utils.logging
@utils.ThreadMethodsAdditionalSuspend('suspend_LibraryThread')
@utils.ThreadMethods
class WebSocket(threading.Thread):
opcode_data = (websocket.ABNF.OPCODE_TEXT, websocket.ABNF.OPCODE_BINARY)
def __init__(self, queue):
self.ws = None
# Communication with librarysync
self.queue = queue
threading.Thread.__init__(self)
def process(self, opcode, message):
if opcode not in self.opcode_data:
return False
try:
message = json.loads(message)
except Exception as ex:
self.logMsg('Error decoding message from websocket: %s' % ex, -1)
self.logMsg(message, -1)
return False
# Triage
typus = message.get('type')
if typus is None:
self.logMsg('No message type, dropping message: %s' % message, -1)
return False
self.logMsg('Received message from PMS server: %s' % message, 2)
# 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
try:
self.queue.put(message)
return True
except Queue.Full:
# Queue only takes 200 messages. No worries if we miss one or two
self.logMsg('Queue is full, dropping PMS message %s' % message, 0)
return False
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 = utils.window('pms_server')
# Need to use plex.tv token, if any. NOT user token
token = utils.window('plex_token')
# Get the appropriate prefix for the websocket
if "https" in server:
server = server.replace('https', "wss")
else:
server = server.replace('http', "ws")
uri = "%s/:/websockets/notifications" % server
if token:
uri += '?X-Plex-Token=%s' % token
sslopt = {}
if utils.settings('sslverify') == "false":
sslopt["cert_reqs"] = ssl.CERT_NONE
return uri, sslopt
def run(self):
log = self.logMsg
log("----===## Starting WebSocketClient ##===----", 0)
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("##===---- WebSocketClient Stopped ----===##", 0)
return
xbmc.sleep(1000)
try:
self.process(*self.receive(self.ws))
except websocket.WebSocketTimeoutException:
# No worries if read timed out
pass
except websocket.WebSocketConnectionClosedException:
log("Connection closed, (re)connecting", 0)
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("Error connecting", 0)
self.ws = None
counter += 1
if counter > 10:
log("Repeatedly could not connect to PMS, declaring "
"the connection dead", -1)
utils.window('emby_online', value='false')
counter = 0
xbmc.sleep(1000)
except websocket.WebSocketTimeoutException:
log("timeout while connecting, trying again", 0)
self.ws = None
xbmc.sleep(1000)
except Exception as e:
log("Unknown exception encountered in connecting: %s" % e)
self.ws = None
xbmc.sleep(1000)
else:
counter = 0
except Exception as e:
log("Unknown exception encountered: %s" % e)
try:
self.ws.shutdown()
except:
pass
self.ws = None
log("##===---- WebSocketClient Stopped ----===##", 0)
def stopThread(self):
"""
Overwrite this method from ThreadMethods to close websockets
"""
self.logMsg("Stopping websocket client thread.", 1)
self._threadStopped = True
try:
self.ws.shutdown()
except:
pass