Synchronous http request in Swift

sync-http.swift

import Foundation

func query(address: String) -> String {
    let url = URL(string: address)
    let semaphore = DispatchSemaphore(value: 0)
    
    var result: String = ""
    
    let task = URLSession.shared.dataTask(with: url!) {(data, response, error) in
        result = String(data: data!, encoding: String.Encoding.utf8)!
        semaphore.signal()
    }
    
    task.resume()
    semaphore.wait()
    return result
}

let preference = query(address: "http://the-rock-paper-scissors.herokuapp.com/newgame")
print("Computer preference: \(preference)")