ExtJS - Ruby on Rails - WARNING: Can't verify CSRF token authenticity workaround to verify csrf token in every ajax request.

gistfile1.js

Ext.Ajax.defaultHeaders = {'Accept':'application/json'};
Ext.Ajax.on('beforerequest', function (o) {
    var csrf = Ext.select("meta[name='csrf-token']").first();
    if (csrf) {
        o.defaultHeaders = Ext.apply(o.defaultHeaders || {}, {'X-CSRF-Token':csrf.getAttribute('content')});
    }
});