Swift 5 URLSessionDataTask async/await

URLSessionAsyncAwaitUnsafe.swift

import UIKit

class ViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
        detach { [weak self] in
            await print(self?.getGoogle())
        }
    }
    
    private func getGoogle() async -> String? {
        let google = Google(url: .init(string: "https://www.google.com")!)
        return try? await google.get()
    }

}

actor Google {
    var dataString: String?
    private let url: URL
    private lazy var request = URLRequest(url: url)

    init(url: URL) {
        self.url = url
    }
    
    private func oldCompletionMethod(completion: @escaping () -> Void) {
        URLSession.shared.dataTask(with: url) { data, response, error in
            if let error = error {
                print(error)
                completion()
            }
            
            if let data = data {
                self.dataString = String(data: data, encoding: .ascii)
                completion()
            }
        }.resume()
    }
    
    private func asyncTask() async {
        await withUnsafeContinuation { task in
            oldCompletionMethod {
                task.resume()
            }
        }
    }
    
    func get() async throws -> String? {
        await asyncTask()
        return dataString
    }
}