swift dingtalk

func dingTalkMessage(_ message: String?) {
    NotificationService .dingTalkMessage(message);
  }
  
  
  static func dingTalkMessage(_ message: String?) {
    let date = Date()

    let fmt = DateFormatter()
    fmt.dateFormat = "yyyy-MM-dd HH:mm:ss.SSS"

    let session = URLSession.shared
    let url = URL(string: "https://oapi.dingtalk.com/robot/send?access_token=34d24e60369700fed248820e980462b6376ec694d0dd2eb31bf6008cc1d4a5f6")
    var request: NSMutableURLRequest? = nil
    if let url = url {
        request = NSMutableURLRequest(url: url)
    }
    request?.httpMethod = "POST"
    request?.addValue("application/json", forHTTPHeaderField: "content-type")
    let currentDevice = UIDevice.current
    let bodyDict = [
        "msgtype": "text",
        "text": [
        "content": "\(fmt.string(from: date)), [name] \(currentDevice.name),[model] \(currentDevice.model),[system] \(currentDevice.systemName)-\(currentDevice.systemVersion),[token] \(message ?? "")"
    ]
      ] as [String : Any]
    var jsonData: Data? = nil
    do {
        jsonData = try JSONSerialization.data(withJSONObject: bodyDict, options: .prettyPrinted)
    } catch {
    }
    if let jsonData = jsonData {
        request?.httpBody = String(data: jsonData, encoding: .utf8)?.data(using: .utf8)
    }
    //    RCTLog(@"[Token] %@", bodyDict[@"text"][@"content"]);
    var dataTask: URLSessionDataTask? = nil
    let req : URLRequest = request?.mutableCopy() as! URLRequest;
    if request != nil {
      dataTask = session.dataTask(with: req, completionHandler: { data, response, error in
        })
    }
    dataTask?.resume()
  }