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Narciso
9 lines
522 B
TypeScript
9 lines
522 B
TypeScript
// Valid hostname per RFC 1123: labels of letters, digits and hyphens
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// (no leading/trailing hyphen), optionally separated by dots. Underscores are rejected
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// because Let's Encrypt refuses to issue certificates for them.
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export const VALID_HOSTNAME_REGEX =
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/^(?:[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?\.)*[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?$/;
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export const INVALID_HOSTNAME_MESSAGE =
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"Invalid domain name. Use only letters, numbers, hyphens and dots (e.g. example.com). Underscores are not allowed.";
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