NXOAuth2 handler using AppleScript to open Safari

url_handler.swift

func createAuthHandler() -> NXOAuth2PreparedAuthorizationURLHandler {
    return { (url: NSURL!) -> Void in
        let sourceScript = "tell application \"Safari\"\n"
            + " open location \"\(url.absoluteString!)\"\n"
            + " activate\n"
            + "end tell\n"
        var err : NSDictionary?
        let script = NSAppleScript(source: sourceScript)!
        
        if script.compileAndReturnError(&err) {
            if script.executeAndReturnError(&err) != nil {
                //
                // Success
                //
            } else {
                println("Failed to execute and return")
            }
        } else {
            println("Failed to compile script")
        }
    }
}