easy DataTask

easy DataTask.md

Usage

URLSession.shared.CallBackDataTask(with: <#URLRequest#>) { 
      switch $0{
      case .success(let success):
        let data:Data = success.0
        let reponse:HTTPURLResponse = success.1
        ...
        
      case .failure(let error):
        let error:Error = error
        ...
        
      }
    }

URLSession+.swift

extension URLSession{
  typealias URLResult = Result<(Data,URLResponse),Error>
  typealias URLCallback = (URLResult)->Void
  enum URLERROR:Error {
    case  nodata, reponseUnknow
  }
  func CallBackDataTask(with request:URLRequest,
                        callback:@escaping URLCallback){
    let task = dataTask(with: request) { (data, reponse, error) in
      var result:URLResult
      defer {
        DispatchQueue.main.async { callback(result)}
      }
      if let error = error {
        result = .failure(error)
        return
      }

      guard let reponse = reponse as? HTTPURLResponse else {
          result = .failure(URLERROR.reponseUnknow)
          return
      }
      guard let data = data else {
        result = .failure(URLERROR.nodata)
        return
      }
      result = .success((data, reponse))
    }

    DispatchQueue.global().async {
      task.resume()
    }
  }
}