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Viewing file:     isFQDN.js (2.09 KB)      -rw-r--r--

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = isFQDN;

var _assertString = _interopRequireDefault(require("./util/assertString"));

var _merge = _interopRequireDefault(require("./util/merge"));

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

var default_fqdn_options = {
  require_tld: true,
  allow_underscores: false,
  allow_trailing_dot: false,
  allow_numeric_tld: false,
  allow_wildcard: false,
  ignore_max_length: false
};

function isFQDN(str, options) {
  (0, _assertString.default)(str);
  options = (0, _merge.default)(options, default_fqdn_options);
  /* Remove the optional trailing dot before checking validity */

  if (options.allow_trailing_dot && str[str.length - 1] === '.') {
    str = str.substring(0, str.length - 1);
  }
  /* Remove the optional wildcard before checking validity */


  if (options.allow_wildcard === true && str.indexOf('*.') === 0) {
    str = str.substring(2);
  }

  var parts = str.split('.');
  var tld = parts[parts.length - 1];

  if (options.require_tld) {
    // disallow fqdns without tld
    if (parts.length < 2) {
      return false;
    }

    if (!options.allow_numeric_tld && !/^([a-z\u00A1-\u00A8\u00AA-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]{2,}|xn[a-z0-9-]{2,})$/i.test(tld)) {
      return false;
    } // disallow spaces


    if (/\s/.test(tld)) {
      return false;
    }
  } // reject numeric TLDs


  if (!options.allow_numeric_tld && /^\d+$/.test(tld)) {
    return false;
  }

  return parts.every(function (part) {
    if (part.length > 63 && !options.ignore_max_length) {
      return false;
    }

    if (!/^[a-z_\u00a1-\uffff0-9-]+$/i.test(part)) {
      return false;
    } // disallow full-width chars


    if (/[\uff01-\uff5e]/.test(part)) {
      return false;
    } // disallow parts starting or ending with hyphen


    if (/^-|-$/.test(part)) {
      return false;
    }

    if (!options.allow_underscores && /_/.test(part)) {
      return false;
    }

    return true;
  });
}

module.exports = exports.default;
module.exports.default = exports.default;