This example shows a minimal HTTP Request handler function with the recommended structure.

http.agent.nut

// Define an HTTP request handler
function requestHandler(request, response) {
    try {
        if ("setting" in request.query) {
            // 'setting' is a URL-encoded parameter, ie. '/setting=4'
            local settingValue = request.query.setting;
            
            // Use the 'response' object to acknowledge reception of the request
            // to the request's source. '200' is HTTP status code for 'OK'
            response.send(200, "Setting received and applied");
        }
    } catch (error) {
        // Something went wrong; inform the source of the request
        // '500' is HTTP status code for 'Internal Server Error'
        response.send(500, error);
    }
}
 
// Register the handler function as a callback
http.onrequest(requestHandler);