How to get the http request object in the application.js in ember [duplicate]

This question already has an answer here:

• How do I access the HTTP request header fields via JavaScript? 6 answers

so I'm running EmberJs in the front-end and I want the request object first time the browser hit the front-end to get the headers from the request.

I need it in the application.js in the route.

How do I go about doing it?