Question

I’m experimenting with JSON and http response codes. I’m submitting a form via an AJAX request and I obviously need to validate the data on the server-side.

My idea is to respond with a “200 OK” response (with a confirmation message as the body) if the post is successful. I don’t know what to respond with if the data that the user sends is invalid.

Answer 1

Just implement a standard protocol like JSON-RPC. It has error handling, parameter passing, etc.

Request:

{"method": "postMessage", "params": ["Hello all!"], "id": 99}

Response:

{"result": 1, "error": null, "id": 99}

And on error:

{"result": null, "error": "Duplicate Message", "id": 99}

It’s quite flexible, and is standard…