function validateUrl(value) {
  var urlPattern = new RegExp(
    "^(https?:\\/\\/)?" + // validate protocol
      "((([a-z\\d]([a-z\\d-]*[a-z\\d])*)\\.)+[a-z]{2,}|" + // validate domain name
      "((\\d{1,3}\\.){3}\\d{1,3}))" + // validate OR ip (v4) address
      "(\\:\\d+)?(\\/[-a-z\\d%_.~+]*)*" + // validate port and path
      "(\\?[;&a-z\\d%_.~+=-]*)?" + // validate query string
      "(\\#[-a-z\\d_]*)?$",
    "i"
  );

  return !!urlPattern.test(value);
}

module.exports = { validateUrl };