From 464ff1ff5754397cb577e042e34c41ebe59254c2 Mon Sep 17 00:00:00 2001
From: Fabio Manganiello <blacklight86@gmail.com>
Date: Tue, 12 Jun 2018 10:33:30 +0200
Subject: [PATCH] A more robust way to handle JSON
 serialization/deserialization on MQTT backend

---
 platypush/backend/mqtt.py | 20 ++++----------------
 platypush/plugins/mqtt.py |  8 ++++++++
 2 files changed, 12 insertions(+), 16 deletions(-)

diff --git a/platypush/backend/mqtt.py b/platypush/backend/mqtt.py
index c0d25030..e875e5e5 100644
--- a/platypush/backend/mqtt.py
+++ b/platypush/backend/mqtt.py
@@ -5,7 +5,6 @@ import paho.mqtt.publish as publisher
 
 from platypush.backend import Backend
 from platypush.message import Message
-from platypush.context import get_backend
 
 
 class MqttBackend(Backend):
@@ -27,15 +26,10 @@ class MqttBackend(Backend):
         self.port = port
         self.topic = '{}/{}'.format(topic, self.device_id)
 
-        try:
-            self.redis = get_backend('redis')
-        except:
-            self.redis = None
-
 
     def send_message(self, msg):
         try:
-            msg = json.loads(msg)
+            msg = Message.build(json.loads(msg))
         except:
             pass
 
@@ -48,17 +42,11 @@ class MqttBackend(Backend):
 
         def on_message(client, userdata, msg):
             msg = msg.payload.decode('utf-8')
-            try:
-                msg = Message.build(json.loads(msg))
-            except:
-                pass
+            try: msg = Message.build(json.loads(msg))
+            except: pass
 
             self.logger.info('Received message on the MQTT backend: {}'.format(msg))
-
-            if self.redis:
-                self.redis.send_message(msg)
-            else:
-                self.bus.post(msg)
+            self.bus.post(msg)
 
         super().run()
         client = mqtt.Client()
diff --git a/platypush/plugins/mqtt.py b/platypush/plugins/mqtt.py
index 8ce0079a..b1e3c22b 100644
--- a/platypush/plugins/mqtt.py
+++ b/platypush/plugins/mqtt.py
@@ -1,11 +1,19 @@
+import json
 import paho.mqtt.publish as publisher
 
+from platypush.message import Message
 from platypush.message.response import Response
 from platypush.plugins import Plugin
 
 
 class MqttPlugin(Plugin):
     def send_message(self, topic, msg, host, port=1883, *args, **kwargs):
+        try: msg = json.dumps(msg)
+        except: pass
+
+        try: msg = Message.build(json.loads(msg))
+        except: pass
+
         publisher.single(topic, str(msg), hostname=host, port=port)
         return Response(output={'state': 'ok'})