catch bad messages in RabbitMQ

sender/sender.py

@@ -37,19 +37,30 @@ def send_message(text, sender, destination):
 		return True
 
 	else:
-		print('Sender not in registrations.json')
+		print('Sender not in registrations.json.')
 		return False
 
 def callback(ch, method, properties, body):
+	try:
 		body = json.loads(body)
+		if len(body) == 3:
 			text = body[0]
 			sender = body[1]
 			destination = body[2]
+		
 			if send_message(text, sender, destination):
+				print("Message sent succesfully")
+			else:
+				print("Sending message failed")
+		else:
+			print("Sending message failed")
+
 		channel.basic_ack(delivery_tag=method.delivery_tag)
 		return True
 
-
+	except:
+		channel.basic_ack(delivery_tag=method.delivery_tag)
+		pass
 
 
 channel.basic_consume('signal-send', callback, auto_ack=False)