Rewritten Pushbullet backend using pushbullet.py for better stability

platypush/backend/pushbullet/__init__.py

@@ -1,16 +1,14 @@
-import asyncio
 import json
 import requests
 import time
-import websockets
 
+from pushbullet import Pushbullet, Listener
+
+from platypush.backend import Backend
 from platypush.config import Config
-from platypush.context import get_or_create_event_loop
 from platypush.message import Message
 from platypush.message.event.pushbullet import PushbulletEvent
 
-from .. import Backend
-
 
 class PushbulletBackend(Backend):
     """
@@ -28,79 +26,45 @@ class PushbulletBackend(Backend):
     Requires:
 
         * **requests** (``pip install requests``)
-        * **websockets** (``pip install websockets``)
+        * **pushbullet.py** (``pip install git+https://github.com/rbrcsk/pushbullet.py``)
     """
 
-    _PUSHBULLET_WS_URL = 'wss://stream.pushbullet.com/websocket/'
+    def __init__(self, token, device='Platypush', proxy_host=None,
-    _WS_PING_INTERVAL = 10
+                 proxy_port=None, **kwargs):
-
-    def __init__(self, token, device='Platypush', **kwargs):
         """
-        :param token: Your Pushbullet API token, see https://docs.pushbullet.com/#authentication
+        :param token: Your Pushbullet API token, see
+            https://docs.pushbullet.com/#authentication
         :type token: str
 
         :param device: Name of the virtual device for Platypush (default: Platypush)
         :type device: str
+
+        :param proxy_host: HTTP proxy host (default: None)
+        :type proxy_host: str
+
+        :param proxy_port: HTTP proxy port (default: None)
+        :type proxy_port: int
         """
 
         super().__init__(**kwargs)
 
         self.token = token
         self.device_name = device
+        self.proxy_host = proxy_host
+        self.proxy_port = proxy_port
+        self.pb = Pushbullet(token)
         self.pb_device_id = self.get_device_id()
-        self.ws = None
+        self.listener = None
+        self.device = self.pb.get_device(self.device_name)
 
-        self._last_received_msg = {
-            'request'  : { 'body': None, 'time': None },
-            'response' : { 'body': None, 'time': None },
-            'event'    : { 'body': None, 'time': None },
-        }
 
     def _get_latest_push(self):
         t = int(time.time()) - 5
-        try:
+        pushes = self.pb.get_pushes(modified_after=str(t), limit=1)
-            response = requests.get(
+        return pushes[0]
-                u'https://api.pushbullet.com/v2/pushes',
-                headers = { 'Access-Token': self.token },
-                params  = {
-                    'modified_after': str(t),
-                    'active' : 'true',
-                    'limit'  : 1,
-                }
-            )
 
-            response = response.json()
+    def on_push(self):
-        except Exception as e:
+        def callback(data):
-            self.logger.exception(e)
-            raise e
-
-        if 'pushes' in response and response['pushes']:
-            return response['pushes'][0]
-        else:
-            return {}
-
-    def _should_skip_last_received_msg(self, msg):
-        if not isinstance(msg, dict): return True  # We received something weird
-
-        is_duplicate=False
-        last_msg = self._last_received_msg[msg['type']]
-
-        if last_msg:
-            msg = Message.parse(msg)
-            if str(msg) == str(last_msg['body']) \
-                    and time.time() - last_msg['time'] <= 2:
-                # Duplicate message sent on the Pushbullet socket within
-                # two seconds, ignore it
-                self.logger.debug('Ignoring duplicate message received on the socket')
-                is_duplicate = True
-
-        self._last_received_msg[msg['type']] = {
-            'body': msg, 'time': time.time()
-        }
-
-        return is_duplicate
-
-    def on_push(self, ws, data):
             try:
                 # Parse the push
                 try:
@@ -128,100 +92,34 @@ class PushbulletBackend(Backend):
                 try: body = json.loads(body)
                 except ValueError as e: return  # Some other non-JSON push
 
-            if not self._should_skip_last_received_msg(body):
                 self.on_message(body)
             except Exception as e:
                 self.logger.exception(e)
                 return
 
-    def on_error(self, ws, e):
+        return callback
-        self.logger.exception(e)
-
-    def _init_socket(self):
-        async def pushbullet_client():
-            while True:
-                try:
-                    self.logger.info('Connecting to Pushbullet websocket URL {}'
-                                     .format(self._PUSHBULLET_WS_URL))
-
-                    async with websockets.connect(self._PUSHBULLET_WS_URL +
-                                                  self.token) as self.ws:
-                        self.logger.info('Connection to Pushbullet successful')
-
-                        while True:
-                            try:
-                                push = await self.ws.recv()
-                            except Exception as e:
-                                self.logger.warning('Disconnected from ' +
-                                                    'Pushbullet: {}'.
-                                                    format(str(e)))
-                                break
-
-                            self.on_push(self.ws, push)
-                except Exception as e:
-                    self.logger.exception(e)
-
-        self.close()
-        loop = None
-
-        loop = get_or_create_event_loop()
-        loop.run_until_complete(pushbullet_client())
-        loop.run_forever()
-
-
-    def create_device(self, name):
-        return requests.post(
-            u'https://api.pushbullet.com/v2/devices',
-            headers = { 'Access-Token': self.token },
-            json = {
-                'nickname': name,
-                'model': 'Platypush virtual device',
-                'manufactorer': 'platypush',
-                'app_version': 8623,
-                'icon': 'system',
-            }
-        ).json()
-
 
     def get_device_id(self):
-        response = requests.get(
-            u'https://api.pushbullet.com/v2/devices',
-            headers = { 'Access-Token': self.token },
-        ).json()
-
-        devices = [dev for dev in response['devices'] if 'nickname' in dev
-                   and dev['nickname'] == self.device_name]
-
-        if devices:
-            return devices[0]['iden']
-
         try:
-            response = self.create_device(self.device_name)
+            return self.pb.get_device(self.device_name).device_iden
-            if 'iden' not in response:
+        except Exception as e:
-                raise RuntimeError()
+            device = self.pb.new_device(name, model='Platypush virtual device',
+                                        manufactorer='platypush',
+                                        app_version=8623, icon='system')
 
             self.logger.info('Created Pushbullet device {}'.format(
                 self.device_name))
 
-            return response['iden']
+            return device.device_iden
-        except Exception as e:
-            self.logger.error('Unable to create Pushbillet device {}'.
-                                format(self.device_name))
 
     def send_message(self, msg):
-        requests.post(
+        if isinstance(msg, dict):
-            u'https://api.pushbullet.com/v2/pushes',
+            msg = json.dumps(msg)
-            headers = { 'Access-Token': self.token },
+        self.device.push_note(title=None, body=str(msg))
-            json = {
-                'type': 'note',
-                'device_iden': self.pb_device_id,
-                'body': str(msg)
-            }
-        ).json()
 
     def close(self):
-        if self.ws:
+        if self.listener:
-            self.ws.close()
+            self.listener.close()
 
     def on_stop(self):
         return self.close()
@@ -231,7 +129,12 @@ class PushbulletBackend(Backend):
 
         self.logger.info('Initialized Pushbullet backend - device_id: {}'
                      .format(self.device_name))
-        self._init_socket()
+
+        self.listener = Listener(account=self.pb, on_push=self.on_push(),
+                                 http_proxy_host=self.proxy_host,
+                                 http_proxy_port=self.proxy_port)
+
+        self.listener.run_forever()
 
 # vim:sw=4:ts=4:et:
 

platypush/plugins/pushbullet.py

@@ -15,6 +15,7 @@ class PushbulletPlugin(Plugin):
     Requires:
 
         * **requests** (``pip install requests``)
+        * The :class:`platypush.backend.pushbullet.Pushbullet` backend enabled
     """
 
     def __init__(self, *args, **kwargs):

requirements.txt

@@ -11,6 +11,9 @@ pyyaml
 # Apache Kafka backend support
 kafka-python
 
+# Pushbullet backend support
+git+https://github.com/rbrcsk/pushbullet.py
+
 # HTTP backend support
 flask
 websockets

setup.py

@@ -66,7 +66,7 @@ setup(
     ],
     extras_require = {
         'Support for Apache Kafka backend': ['kafka-python'],
-        'Support for Pushbullet backend': ['requests', 'websockets'],
+        'Support for Pushbullet backend': ['requests', 'git+https://github.com/rbrcsk/pushbullet.py'],
         'Support for HTTP backend': ['flask','websockets', 'python-dateutil'],
         'Support for HTTP poll backend': ['frozendict'],
         'Support for database plugin': ['sqlalchemy'],