Added ASGI server for websocket using the sample chat application as starting point

booker/mqtt_collector.py

@@ -0,0 +1,48 @@
+from channels.generic.websocket import AsyncWebsocketConsumer
+import json
+
+'''
+class ScannerCollector(WebsocketConsumer):
+    def connect(self):
+        self.accept()
+
+    def disconnect(self, close_code):
+        pass
+
+    def receive(self, text_data):
+        text_data_json = json.loads(text_data)
+        message = text_data_json['message']
+
+        self.send(text_data=json.dumps({
+            'message': message
+        }))
+'''
+
+class ScannerCollector(AsyncWebsocketConsumer):
+
+    async def connect(self):
+        self.group_name = 'scanner'
+        # join to group
+        await self.channel_layer.group_add(self.group_name, self.channel_name)
+        await self.accept()
+
+    async def disconnect(self):
+        # leave group
+        await self.channel_layer.group_discard(self.group_name, self.channel_name)
+
+    async def receive(self, text_data):
+        print('>>>', text_data)
+        msg = '{"message":"pong!"}' if text_data == '{"message":"ping"}' else text_data
+        print('<<<', msg)
+        await self.channel_layer.group_send(
+            self.group_name,
+            {
+                'type': 'distribute',
+                'text': msg
+            }
+        )
+
+    async def distribute(self, event):
+        valother = event['text']
+        await self.send(text_data=valother)
+