1 CONSOLE WARNING: Synchronous XMLHttpRequest on the main thread is deprecated because of its detrimental effects to the end user's experience. For more help, check http://xhr.spec.whatwg.org/.
2 CONSOLE ERROR: XMLHttpRequest cannot load http://localhost:8000/xmlhttprequest/resources/access-control-basic-get-fail-non-simple.cgi. Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://127.0.0.1:8000' is therefore not allowed access. The response had HTTP status code 403.
3 PASS: Exception thrown. Cross-domain access was denied in 'send'. [Failed to execute 'send' on 'XMLHttpRequest': Failed to load 'http://localhost:8000/xmlhttprequest/resources/access-control-basic-get-fail-non-simple.cgi'.].