Relax type checking of JSON-RPC responses

[jcubic]

Discussed in #957

^{Originally posted by garrylie August 6, 2024}
I got this error each time I send a command:

[AJAX] Invalid JSON-RPC - Server responded:
{"id":"1","result":"pong","jsonrpc":"2.0"}

What is wrong with my response?
content-type is application/json.

The error is that "id" field is a string, not a number.

This is the function that check the type:

function validJSONRPC(response) {
    return typeof response.id === 'number' &&
        (typeof response.result !== 'undefined' ||
         typeof response.error !== 'undefined');
}

[jcubic]

The user was able to change the id to a number. Actually, this is not a valid JSON-RPC according to 2.0 spec.