swift https get请求

let url = URL(string: "https://api.gizwits.com/app/bindings")!

        let session = URLSession.shared

        var request = URLRequest(url:url)

        request.addValue("application/json", forHTTPHeaderField: "Content-Type")

        request.addValue("3f45901d6bfe4bed905a9a76eb7012c7", forHTTPHeaderField: "X-Gizwits-Application-Id")

        request.addValue(MyClass.Variables.token, forHTTPHeaderField: "X-Gizwits-User-token")

        

        request.httpMethod = "GET"

       request.httpBody = String..data(using: String.Encoding(rawValue: String.Encoding.utf8.rawValue))

        let task = session.dataTask(with: request, completionHandler: {

            (data, response, error) in

            DispatchQueue.main.async {

                guard data != nil && error == nil else {

                    print(error)

                    return

                }

                do {

                    let jsonResult : NSDictionary? = try JSONSerialization.jsonObject(with: data!, options: JSONSerialization.ReadingOptions.mutableContainers) as? NSDictionary

                    print("jsonResult\(jsonResult!)")

                } catch let error as NSError {

                    print("JSON ERROR 2     " + error.localizedDescription)

                }

            }

        })

        task.resume()