@linkedmink/node-route53-dynamic-dns/dist/functions/validate.mjs

Background process that updates AWS Route 53 DNS address records whenever the public IP of the hosting environment changes

const DNS_RECORD_REG_EX = /^((\\052|\\100).)?[a-z0-9-_.]*\.$/;
export const validateNormalizeDnsRecord = (dnsRecordName) => {
    const trimLower = dnsRecordName.trim().toLowerCase();
    const withTrailingDot = trimLower.endsWith(".") ? trimLower : `${trimLower}.`;
    const normalized = withTrailingDot.replace("*", "\\052").replace("@", "\\100");
    if (!DNS_RECORD_REG_EX.test(normalized)) {
        throw new Error(`The name is not a valid DNS record: ${dnsRecordName}`);
    }
    return normalized;
};
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