Let's say I have an RPC call for adding colors. A user can only add colors once. If they add one a second time, I want to return an error response that tells them they screwed up, and why.
The JSON-RPC error response describes an error object that includes a space for a data parameter. It is in here that it seems appropriate to include my error code for "color already added". However, I cannot figure out how to return this in the response.
$jsonRpc = new Server();
$jsonRpc->setClass(new Testi());
$jsonRpc->getRequest()->setVersion(Server::VERSION_2);
if ($_SERVER['REQUEST_METHOD'] == 'GET') {
echo $jsonRpc->getServiceMap()->setEnvelope(Smd::ENV_JSONRPC_2);
}
else {
$jsonRpc->handle();
}
class Testi {
const ERROR_CODE_COLOR_EXISTS = 5;
private $colors = ['red', 'green'];
/**
* @param $color
* @return array
*/
public function addColor($color) {
if (in_array($color, $this->colors)) {
throw new \Exception('Color exists');
}
else {
$this->colors[] = $color;
}
return $this->colors;
}
}
This works, to the degree that an error response is returned, but gives me no option to include my error code (self::ERROR_CODE_COLOR_EXISTS).
{"error":{"code":-32000,"message":"Color exists","data":{}},"id":"","jsonrpc":"2.0"}
How do I put info into that DATA parameter!?
Thanks, Adam
