validator/lib/isURL.js

"use strict";

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

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

var _isFQDN = _interopRequireDefault(require("./isFQDN"));

var _isIP = _interopRequireDefault(require("./isIP"));

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

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

var default_url_options = {
  protocols: ['http', 'https', 'ftp'],
  require_tld: true,
  require_protocol: false,
  require_host: true,
  require_valid_protocol: true,
  allow_underscores: false,
  allow_trailing_dot: false,
  allow_protocol_relative_urls: false
};
var wrapped_ipv6 = /^\[([^\]]+)\](?::([0-9]+))?$/;

function isRegExp(obj) {
  return Object.prototype.toString.call(obj) === '[object RegExp]';
}

function checkHost(host, matches) {
  for (var i = 0; i < matches.length; i++) {
    var match = matches[i];

    if (host === match || isRegExp(match) && match.test(host)) {
      return true;
    }
  }

  return false;
}

function isURL(url, options) {
  (0, _assertString.default)(url);

  if (!url || url.length >= 2083 || /[\s<>]/.test(url)) {
    return false;
  }

  if (url.indexOf('mailto:') === 0) {
    return false;
  }

  options = (0, _merge.default)(options, default_url_options);
  var protocol, auth, host, hostname, port, port_str, split, ipv6;
  split = url.split('#');
  url = split.shift();
  split = url.split('?');
  url = split.shift();
  split = url.split('://');

  if (split.length > 1) {
    protocol = split.shift().toLowerCase();

    if (options.require_valid_protocol && options.protocols.indexOf(protocol) === -1) {
      return false;
    }
  } else if (options.require_protocol) {
    return false;
  } else if (url.substr(0, 2) === '//') {
    if (!options.allow_protocol_relative_urls) {
      return false;
    }

    split[0] = url.substr(2);
  }

  url = split.join('://');

  if (url === '') {
    return false;
  }

  split = url.split('/');
  url = split.shift();

  if (url === '' && !options.require_host) {
    return true;
  }

  split = url.split('@');

  if (split.length > 1) {
    if (options.disallow_auth) {
      return false;
    }

    auth = split.shift();

    if (auth.indexOf(':') >= 0 && auth.split(':').length > 2) {
      return false;
    }
  }

  hostname = split.join('@');
  port_str = null;
  ipv6 = null;
  var ipv6_match = hostname.match(wrapped_ipv6);

  if (ipv6_match) {
    host = '';
    ipv6 = ipv6_match[1];
    port_str = ipv6_match[2] || null;
  } else {
    split = hostname.split(':');
    host = split.shift();

    if (split.length) {
      port_str = split.join(':');
    }
  }

  if (port_str !== null) {
    port = parseInt(port_str, 10);

    if (!/^[0-9]+$/.test(port_str) || port <= 0 || port > 65535) {
      return false;
    }
  }

  if (!(0, _isIP.default)(host) && !(0, _isFQDN.default)(host, options) && (!ipv6 || !(0, _isIP.default)(ipv6, 6))) {
    return false;
  }

  host = host || ipv6;

  if (options.host_whitelist && !checkHost(host, options.host_whitelist)) {
    return false;
  }

  if (options.host_blacklist && checkHost(host, options.host_blacklist)) {
    return false;
  }

  return true;
}

module.exports = exports.default;