Improved stability and reliability of SignalR feed clients.

bazarr/main.py

@@ -197,9 +197,9 @@ def proxy(protocol, url):
 
 
 if settings.general.getboolean('use_sonarr'):
-    sonarr_signalr_client.start()
+    gevent.Greenlet.spawn(sonarr_signalr_client.start)
 if settings.general.getboolean('use_radarr'):
-    radarr_signalr_client.start()
+    gevent.Greenlet.spawn(radarr_signalr_client.start)
 
 
 if __name__ == "__main__":

bazarr/signalr_client.py

@@ -38,16 +38,16 @@ class SonarrSignalrClient:
                             'consider upgrading.')
             return
 
-        logging.debug('BAZARR connecting to Sonarr SignalR feed...')
+        logging.info('BAZARR trying to connect to Sonarr SignalR feed...')
         self.configure()
-        while not self.connection.is_open:
+        while not self.connection.started:
             try:
                 self.connection.start()
             except ConnectionError:
                 gevent.sleep(5)
             except json.decoder.JSONDecodeError:
-                logging.error('BAZARR cannot parse JSON returned by SignalR feed. Take a look at: '
-                              'https://forums.sonarr.tv/t/signalr-problem/5785/3')
+                logging.error("BAZARR cannot parse JSON returned by SignalR feed. This is a known issue when Sonarr "
+                              "doesn't have write permission to it's /config/xdg directory.")
                 self.stop()
         logging.info('BAZARR SignalR client for Sonarr is connected and waiting for events.')
         if not args.dev:
@@ -64,13 +64,16 @@ class SonarrSignalrClient:
 
     def restart(self):
         if self.connection:
-            if self.connection.is_open:
-                self.stop(log=False)
+            if self.connection.started:
+                try:
+                    self.stop(log=False)
+                except:
+                    self.connection.started = False
         if settings.general.getboolean('use_sonarr'):
             self.start()
 
     def exception_handler(self, type, exception, traceback):
-        logging.error('BAZARR connection to Sonarr SignalR feed has been lost. Reconnecting...')
+        logging.error('BAZARR connection to Sonarr SignalR feed has been lost.')
         self.restart()
 
     def configure(self):
@@ -94,8 +97,12 @@ class RadarrSignalrClient:
 
     def start(self):
         self.configure()
-        logging.debug('BAZARR connecting to Radarr SignalR feed...')
-        self.connection.start()
+        logging.info('BAZARR trying to connect to Radarr SignalR feed...')
+        while self.connection.transport.state.value not in [0, 1, 2]:
+            try:
+                self.connection.start()
+            except ConnectionError:
+                gevent.sleep(5)
 
     def stop(self):
         logging.info('BAZARR SignalR client for Radarr is now disconnected.')
@@ -133,8 +140,8 @@ class RadarrSignalrClient:
                 "max_attempts": None
             }).build()
         self.connection.on_open(self.on_connect_handler)
-        self.connection.on_reconnect(lambda: logging.info('BAZARR SignalR client for Radarr connection as been lost. '
-                                                          'Trying to reconnect...'))
+        self.connection.on_reconnect(lambda: logging.error('BAZARR SignalR client for Radarr connection as been lost. '
+                                                           'Trying to reconnect...'))
         self.connection.on_close(lambda: logging.debug('BAZARR SignalR client for Radarr is disconnected.'))
         self.connection.on_error(self.exception_handler)
         self.connection.on("receiveMessage", dispatcher)

libs/signalr/__init__.py

@@ -1,3 +1,8 @@
+from gevent import monkey
+
+monkey.patch_socket()
+monkey.patch_ssl()
+
 from ._connection import Connection
 
-__version__ = '0.0.12'
+__version__ = '0.0.7'

libs/signalr/_connection.py

@@ -1,6 +1,6 @@
 import json
+import gevent
 import sys
-from threading import Thread
 from signalr.events import EventHook
 from signalr.hubs import Hub
 from signalr.transports import AutoTransport
@@ -15,16 +15,14 @@ class Connection:
         self.qs = {}
         self.__send_counter = -1
         self.token = None
-        self.id = None
         self.data = None
         self.received = EventHook()
         self.error = EventHook()
         self.starting = EventHook()
         self.stopping = EventHook()
         self.exception = EventHook()
-        self.is_open = False
         self.__transport = AutoTransport(session, self)
-        self.__listener_thread = None
+        self.__greenlet = None
         self.started = False
 
         def handle_error(**kwargs):
@@ -50,32 +48,27 @@ class Connection:
 
         negotiate_data = self.__transport.negotiate()
         self.token = negotiate_data['ConnectionToken']
-        self.id = negotiate_data['ConnectionId']
 
         listener = self.__transport.start()
 
         def wrapped_listener():
-            while self.is_open:
-                try:
-                    listener()
-                except:
-                    self.exception.fire(*sys.exc_info())
-                    self.is_open = False
-
-        self.is_open = True
-        self.__listener_thread = Thread(target=wrapped_listener)
-        self.__listener_thread.start()
+            try:
+                listener()
+                gevent.sleep()
+            except:
+                self.exception.fire(*sys.exc_info())
+
+        self.__greenlet = gevent.spawn(wrapped_listener)
         self.started = True
 
     def wait(self, timeout=30):
-        Thread.join(self.__listener_thread, timeout)
+        gevent.joinall([self.__greenlet], timeout)
 
     def send(self, data):
         self.__transport.send(data)
 
     def close(self):
-        self.is_open = False
-        self.__listener_thread.join()
+        gevent.kill(self.__greenlet)
         self.__transport.close()
 
     def register_hub(self, name):

libs/signalr/transports/_sse_transport.py

@@ -12,16 +12,11 @@ class ServerSentEventsTransport(Transport):
         return 'serverSentEvents'
 
     def start(self):
-        connect_url = self._get_url('connect')
-        self.__response = iter(sseclient.SSEClient(connect_url, session=self._session))
+        self.__response = sseclient.SSEClient(self._get_url('connect'), session=self._session)
         self._session.get(self._get_url('start'))
 
         def _receive():
-            try:
-                notification = next(self.__response)
-            except StopIteration:
-                return
-            else:
+            for notification in self.__response:
                 if notification.data != 'initialized':
                     self._handle_notification(notification.data)
 

libs/signalr/transports/_transport.py

@@ -1,12 +1,13 @@
 from abc import abstractmethod
 import json
 import sys
-import threading
+
 if sys.version_info[0] < 3:
     from urllib import quote_plus
 else:
     from urllib.parse import quote_plus
 
+import gevent
 
 
 class Transport:
@@ -47,7 +48,7 @@ class Transport:
         if len(message) > 0:
             data = json.loads(message)
             self._connection.received.fire(**data)
-        #thread.sleep() #TODO: investigate if we should sleep here
+        gevent.sleep()
 
     def _get_url(self, action, **kwargs):
         args = kwargs.copy()

libs/signalr/transports/_ws_transport.py

@@ -1,6 +1,7 @@
 import json
 import sys
 
+import gevent
 
 if sys.version_info[0] < 3:
     from urlparse import urlparse, urlunparse
@@ -38,14 +39,14 @@ class WebSocketsTransport(Transport):
         self._session.get(self._get_url('start'))
 
         def _receive():
-            notification = self.ws.recv()
-            self._handle_notification(notification)
+            for notification in self.ws:
+                self._handle_notification(notification)
 
         return _receive
 
     def send(self, data):
         self.ws.send(json.dumps(data))
-        #thread.sleep() #TODO: inveistage if we should sleep here or not
+        gevent.sleep()
 
     def close(self):
         self.ws.close()

libs/version.txt

@@ -30,7 +30,7 @@ rarfile=3.0
 rebulk=3.0.1
 requests=2.18.4
 semver=2.13.0
-signalr-client-threads=0.0.12 <-- Modified to work with Sonarr
+signalr-client=0.0.7 <-- Modified to work with Sonarr and added exception handler
 signalrcore=0.9.2 <-- https://github.com/mandrewcito/signalrcore/pull/60 and 61
 SimpleConfigParser=0.1.0 <-- modified version: do not update!!!
 six=1.11.0