Make an HTTP request asynchronously

 Problem

I want to make an asynchronous HTTP request, given a target URL.

 Recipe

// Set the URL where we're making the request
let request = NSURLRequest(URL: NSURL(string: "https://iswift.org")!)

// Perform the request
NSURLConnection.sendAsynchronousRequest(request, queue: NSOperationQueue(), completionHandler:{
        (response: NSURLResponse?, data: NSData?, error: NSError?)-> Void in

            // Get data as string
            let str = NSString(data: data!, encoding: NSUTF8StringEncoding)
            print(str)
        }
    );