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Emulating a DataTaskPublisher with Progress
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#if canImport(Combine) | |
import Foundation | |
import Combine | |
@available(OSX 10.15, iOS 13.0, tvOS 13.0, watchOS 6.0, *) | |
extension URLSession { | |
public typealias DataTaskProgressPublisher = | |
(progress: Progress, publisher: AnyPublisher<DataTaskPublisher.Output, Error>) | |
public func dataTaskProgressPublisher(for request: URLRequest) -> DataTaskProgressPublisher { | |
let progress = Progress(totalUnitCount: 1) | |
let result = Deferred { | |
Future<DataTaskPublisher.Output, Error> { handler in | |
let task = self.dataTask(with: request) { (data, response, error) in | |
if let error = error { | |
handler(.failure(error)) | |
} else if let data = data, let response = response { | |
handler(.success((data, response))) | |
} | |
} | |
progress.addChild(task.progress, withPendingUnitCount: 1) | |
task.resume() | |
} | |
} | |
return (progress, result.eraseToAnyPublisher()) | |
} | |
@inlinable | |
public func dataTaskProgressPublisher(for url: URL) -> DataTaskProgressPublisher { | |
self.dataTaskProgressPublisher(for: .init(url: url)) | |
} | |
} | |
#endif //canImport(Combine) |
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