How to get HTTP headers

Question

How do you retrieve all HTTP headers from a NSURLRequest in Objective-C?

Answer 1

Swift version using Alamofire for efficiency. This is what worked for me:

Alamofire.request(YOUR_URL).responseJSON {(data) in

if let val = data.response?.allHeaderFields as? [String: Any] {
      print("\(val)")
    }
}