fetch() in swift

gistfile1.swift

class fetch {
    init(_ url: String, cb: (data: String) -> ())  {
        NSURLSession.sharedSession().dataTaskWithURL(NSURL(string: url)!) {(data, response, error) in
            cb(data: NSString(data: data, encoding: NSUTF8StringEncoding) as! String)
        }.resume()
    }
}

fetch("http://www.google.com") {(data: String) in
    println(data);
}