67 lines
1.7 KiB
JavaScript
67 lines
1.7 KiB
JavaScript
import assertString from './util/assertString';
|
|
import merge from './util/merge';
|
|
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
|
|
};
|
|
export default function isFQDN(str, options) {
|
|
assertString(str);
|
|
options = merge(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;
|
|
});
|
|
} |