Update the producer's handle to close the connection if empty data.

notification_server/server.py

@@ -76,8 +76,14 @@ class Server:
 
         try:
             while True:
+                title = await self.receive_message(reader)
                 message = await self.receive_message(reader)
-                print(f"{message=}")
+
+                if title == '' and message == '':
+                    self.console.print(f"The producer ({addr[0]}:{addr[1]}) finished.")
+                    break
+
+                await self.broadcast_message(title)
                 await self.broadcast_message(message)
 
         except asyncio.CancelledError: