Odoo calls actual method for preflight OPTIONS request.
We are using Odoo v11 and we have exposed some APIs for our mobile development written in ionic 4 via 'jsonrpc’. Since Content-Type is 'application/json' for the APIs, IONIC while running makes a preflight OPTIONS call. Odoo instead of returning goes on to make the actual call for the method, since OPTIONS call doesn't have the body it ends up being a 400 bad request error.
Are there any specific settings to be enabled for OPTIONS to return back without hitting the methods?