URLSession+SyncRequest.swift

extension URLSession {
    func sendSynchronousRequest(request: URLRequest) -> (Data?, URLResponse?, Error?) {
        let semaphore = DispatchSemaphore(value: 0)
        
        var result: (data: Data?, response: URLResponse?, error: Error?)
        let task = self.dataTask(with: request) {
            result = (data: $0, response: $1, error: $2)
            semaphore.signal()
        }
        task.resume()
        _ = semaphore.wait(timeout: DispatchTime.distantFuture)
        return result
    }
}