I'm having an issue with showing progress in a upload task. I have created a local express app to test it's behavior. But progress / delegate always throughs the same results. I'm also conforming to URLSessionTaskDelegate.
This is the way I configure URLSession it's always .default
private lazy var session: URLSession = {
.init(
configuration: self.configuration,
delegate: self,
delegateQueue: OperationQueue.main
)
}()
private var observation: NSKeyValueObservation?
Then I call it using this func and convert it into a publisher
func loadData1(path: String, method: RequestMethod, params: [String: String]) -> AnyPublisher<Data, Error> {
let publisher = PassthroughSubject<Data, Error>()
guard let imageUrl = Bundle.main.url(forResource: "G0056773", withExtension: "JPG"),
let imageData = try? Data(contentsOf: imageUrl) else { return Fail(error: NSError(domain: "com.test.main", code: 1000)).eraseToAnyPublisher() }
var request = URLRequest(url: URL(string: "http://localhost:3000/")!)
request.httpMethod = "POST"
let data = request.createFileUploadBody(parameters: [:], boundary: UUID().uuidString, data: imageData, mimeType: "image/jpeg", fileName: "video")
let task = session.uploadTask(with: request, from: data) { data, response, error in
if let error = error {
return publisher.send(completion: .failure(error))
}
guard let response = response as? HTTPURLResponse else { return publisher.send(completion: .failure(ServiceError.other)) }
guard 200..<300 ~= response.statusCode else { return publisher.send(completion: .failure(ServiceError.other)) }
guard let data = data else { return publisher.send(completion: .failure(ServiceError.custom("No data"))) }
return publisher.send(data)
}
observation = task.progress.observe(\.fractionCompleted) { progress, _ in
print("progress: ", progress.totalUnitCount)
print("progress: ", progress.completedUnitCount)
print("progress: ", progress.fractionCompleted)
print("***********************************************")
}
task.resume()
return publisher.eraseToAnyPublisher()
}
request.createFileUploadBody is just an extension of URLRequest that I have created to create the form data's body.
Delegate
func urlSession(_ session: URLSession, task: URLSessionTask, didSendBodyData bytesSent: Int64, totalBytesSent: Int64, totalBytesExpectedToSend: Int64) {
print(bytesSent)
print(totalBytesSent)
print(totalBytesExpectedToSend)
print("*********************************************")
}
No matter how big or small is the file that I'm uploading I always get the same results. The delegate is only called once. And the progress is also always the same.
progress: 100
progress: 0
progress: 0.0095
***********************************************
progress: 100
progress: 0
progress: 4.18053577746524e-07
***********************************************
2272436
2272436
2272436
*********************************************
progress: 100
progress: 95
progress: 0.95
***********************************************
progress: 100
progress: 100
progress: 1.0
***********************************************
^^^^^^ Output from prints
Does anyone knows what might I be doing wrong? Thanks in advance
