Synchronous URL request on Swift 2

Question

I have this code from here to do synchronous request of a URL on Swift 2.

  func send(url: String, f: (String)-> ()) {
    var request = NSURLRequest(URL:         


        

Answer 1

Based on @fpg1503 answer I made a simple extension in Swift 3:

extension URLSession {

    func synchronousDataTask(with request: URLRequest) throws -> (data: Data?, response: HTTPURLResponse?) {

        let semaphore = DispatchSemaphore(value: 0)

        var responseData: Data?
        var theResponse: URLResponse?
        var theError: Error?

        dataTask(with: request) { (data, response, error) -> Void in

            responseData = data
            theResponse = response
            theError = error

            semaphore.signal()

        }.resume()

        _ = semaphore.wait(timeout: .distantFuture)

        if let error = theError {
            throw error
        }

        return (data: responseData, response: theResponse as! HTTPURLResponse?)

    }

}

Then you simply call:

let (data, response) = try URLSession.shared.synchronousDataTask(with: request)