OpenRedirects

OpenRedirects

        static void Main(string[] args)
        {
            var url    = "https://www.gogole.com";
            var result =  url.IsLocalUrl();
            Console.WriteLine(result);

            Console.ReadKey();
        }
        
         public static bool IsLocalUrl(this string url)
        {
            return !url.IsEmpty() &&
          ((url[0] == '/' && (url.Length == 1 ||
           (url[1] != '/' && url[1] != '\\'))) ||   // "/" or "/foo" but not "//" or "/\"
           (url.Length > 1 &&
            url[0] == '~' && url[1] == '/'));   // "~/" or "~/foo"

        }

         public static bool IsEmpty(this string value) {
             return string.IsNullOrEmpty(value);
         }