☰
›

Content-type of postback API

ACV
ACV in Java client
What is the Content-type that is sent to postback url?

In the documentation, it is mentioned it is sent as a raw JSON, however when I deployed my app, I get the below error
HttpMediaTypeNotSupportedException: Content-Type 'application/x-www-form-urlencoded;charset=UTF-8' is not supported

Currently my endpoint can handle 'Content-Type: application/json'
Tagged:
  • sujith
    sujith
    It is a form post request and payload data is a json.
  • ACV
    ACV
    Using x-www-form-urlencoded also didn’t work for me
    @sujith Could you share a sample curl command
  • sujith
    sujith
    You may refer to this thread.
  • ACV
    ACV
    I finally got it working, although i find this implementation non standard.

    If anyone else is looking to implement this here is a sample curl & implementation in spring 
    curl --location 'https://website/postback' \
    --header 'Content-Type: application/x-www-form-urlencoded' \
    --data '{
        "user_id": "AB1234",
        "unfilled_quantity": 0,
        "app_id": 1234,
        "checksum": "2011845d9348bd6795151bf4258102a03431e3bb12a79c0df73fcb4b7fde4b5d",
        "placed_by": "AB1234",
        "order_id": "220303000308932",
        "exchange_order_id": "1000000001482421",
        "parent_order_id": null,
        "status": "COMPLETE",
        "status_message": null,
        "status_message_raw": null,
        "order_timestamp": "2022-03-03 09:24:25",
        "exchange_update_timestamp": "2022-03-03 09:24:25",
        "exchange_timestamp": "2022-03-03 09:24:25",
        "variety": "regular",
        "exchange": "NSE",
        "tradingsymbol": "SBIN",
        "instrument_token": 779521,
        "order_type": "MARKET",
        "transaction_type": "BUY",
        "validity": "DAY",
        "product": "CNC",
        "quantity": 1,
        "disclosed_quantity": 0,
        "price": 0,
        "trigger_price": 0,
        "average_price": 470,
        "filled_quantity": 1,
        "pending_quantity": 0,
        "cancelled_quantity": 0,
        "market_protection": 0,
        "meta": {},
        "tag": null,
        "guid": "XXXXXX"
    }'

      @PostMapping(path = "/orderUpdate")
      public void orderUpdate(HttpServletRequest request) {
        String rawRequestBody = request.getReader().lines().collect(Collectors.joining(System.lineSeparator()));
        String postbackString = URLDecoder.decode(rawRequestBody, StandardCharsets.UTF_8);
        PostbackData postbackData = objectMapper.readValue(postbackString, PostbackData.class);
        if (validatePostbackData(postbackData)) {
          
        }
      }

      private boolean validatePostbackData(PostbackData postbackData) {
        String shaFromKite = postbackData.getChecksum();
        String myKey = postbackData.getOrder_id() + postbackData.getOrder_timestamp() + apiSecret;
        String shaFromMe = org.apache.commons.codec.digest.DigestUtils.sha256Hex(myKey);
        return shaFromKite.equals(shaFromMe);
      }
This discussion has been closed.