import UIKit

class ViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.



        let videoURL = "https://www.youtube.com/watch?v=KMU0tzLwhbE"
        let url = NSURL(string: "https://www.youtubeinmp3.com/fetch/?format=JSON&video=\(videoURL)")
        let sessionConfig = URLSessionConfiguration.default
        let session = URLSession(configuration: sessionConfig, delegate: nil, delegateQueue: nil)
        let request = NSMutableURLRequest(url: url! as URL)
        request.httpMethod = "GET"

        let task = session.dataTask(with: request as URLRequest, completionHandler: { (data: Data?, response: URLResponse?, error: Error?) -> Void in
            if (error == nil) {
                if let response = response as? HTTPURLResponse {
                    print("response=\(response)")
                    if response.statusCode == 200 {
                        if data != nil {
                            do {
                                let responseJSON =  try  JSONSerialization.jsonObject(with: data!, options: JSONSerialization.ReadingOptions.allowFragments) as! NSDictionary;
                                let urlString = responseJSON["link"] as! String
                                let directDownloadURL = NSURL(string: urlString)

                                // Call your method loadFileAsync
//                                YourClass.loadFileAsync(directDownloadURL!, completion: { (path, error) -> Void in
//                                    print(path)
//                                })

                            }
                            catch let JSONError as NSError {
                                print("\(JSONError)")
                            }
                            catch {
                                print("unknown error in JSON Parsing");
                            }

                        }
                    }
                }
            }
            else {
                print("Failure: \(error!.localizedDescription)");
            }
        })
        task.resume()
    }



    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }


}

response=<NSHTTPURLResponse: 0x600000034e60> { URL: https://www.youtubeinmp3.com/fetch/?format=JSON&video=https://www.youtube.com/watch?v=KMU0tzLwhbE } { status code: 200, headers {
    "Access-Control-Allow-Origin" = "*";
    "CF-RAY" = "38b8e073d7e40b44-NRT";
    Connection = "keep-alive";
    "Content-Encoding" = gzip;
    "Content-Type" = "text/html";
    Date = "Wed, 09 Aug 2017 07:07:09 GMT";
    Server = "cloudflare-nginx";
    "Set-Cookie" = "__cfduid=dc236608843f6bf4e2b20fbcee9729e881502262428; expires=Thu, 09-Aug-18 07:07:08 GMT; path=/; domain=.youtubeinmp3.com; HttpOnly";
    "Transfer-Encoding" = Identity;
    Vary = "Accept-Encoding";
    "X-Powered-By" = "PHP/5.5.38";
} }