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December 21, 2019 07:52
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extension URLSession { | |
func send<T: Decodable>(_ request: URLRequest, | |
completion: @escaping ((Result<T, Error>) -> Void)) { | |
let task = dataTask(with: request) { (data, response, error) in | |
if let data = data { | |
do { | |
let decoded = try JSONDecoder().decode(T.self, from: data) | |
completion(.success(decoded)) | |
} | |
catch let error { | |
completion(.failure(error)) // decoding error | |
} | |
} | |
else if let error = error { | |
completion(.failure(error)) // data task error | |
} | |
else { | |
completion(.failure(NSError())) // unknown error | |
} | |
} | |
task.resume() | |
} | |
} | |
// Usage example | |
let urlSession = URLSession(configuration: .default) | |
urlSession.send(request, completion: { (result: <Author, Error>) in | |
// consume result | |
}) |
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