ignore echo messages

app/main.py

@@ -106,6 +106,18 @@ async def webhook(request: Request):
 
     try:
         body = json.loads(body_bytes)
+        # Kiểm tra an toàn echo
+        is_echo = (
+            isinstance(body, dict)
+            and "entry" in body
+            and isinstance(body["entry"], list)
+            and len(body["entry"]) > 0
+            and isinstance(body["entry"][0], dict)
+            and body["entry"][0].get("is_echo", False)
+        )
+        if is_echo:
+            logger.info(f"[DEBUG] Message is echo, skipping...")
+            return {"status": "ok"}
         message_data = facebook_client.parse_message(body)
         logger.info(f"[DEBUG] message_data: {message_data}")