how to return http code 400 in restlet

AI generated answer (using internal Slack threads):

In NetSuite's RESTlets, you can't directly control the HTTP status codes. The only status codes you can set are 200 for a successful request and 400 for a user error by throwing an error. Here is an example of how you can throw an error to return a 400 status code:

javascript
throw nlapiCreateError('INVALID_DATA', 'The provided data is invalid', true);

However, if you want to return other status codes like 404, you can't do it directly. A common workaround is to wrap your responses in an object that includes a status code, and then have the client application check this status code instead of the HTTP status code. Here is an example:

javascript
{
  code: 404,
  data: {}
}

In this case, the client application would need to be designed to unwrap this response and handle it accordingly. Another approach is to use an intermediate system like Amazon's API Gateway or a Google Cloud function relay. This system would accept requests from the client application, forward them to NetSuite, unwrap the response, and reply to the client application with the appropriate status code. However, this approach adds additional latency and increases maintenance. ****** Disclaimer: This response was generated by an artificial intelligence assistant based on previous conversations from multiple Slack channels, and may contain inaccuracies or mistakes. ******