@aikidosec/firewall
Version:
Zen by Aikido is an embedded Application Firewall that autonomously protects Node.js apps against common and critical attacks, provides rate limiting, detects malicious traffic (including bots), and more.
35 lines (34 loc) • 1.02 kB
JavaScript
;
/**
* Based on https://github.com/validatorjs/validator.js/blob/master/src/lib/isFQDN.js
* MIT License - Copyright (c) 2018 Chris O'Hara
*/
Object.defineProperty(exports, "__esModule", { value: true });
exports.default = isFQDNString;
function isFQDNString(str) {
const parts = str.split(".");
if (parts.length < 2) {
return false;
}
const tld = parts[parts.length - 1];
if (!/^([a-z\u00A1-\u00A8\u00AA-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]{2,}|xn[a-z0-9-]{2,})$/i.test(tld)) {
return false;
}
return parts.every((part) => {
if (part.length > 63) {
return false;
}
if (!/^[a-z_\u00a1-\uffff0-9-]+$/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;
}
return true;
});
}