V1 Subdomain change

Regex

/^(?!xn--|sthree-|sthree-configurator)(?!.*-s3alias$)(?!.*--ol-s3$)(?!.*(\.\.|--|__))(?!.*\.-|\.-|-$)[a-z0-9][a-z0-9-]{0,62}[a-z0-9]$/

This regex is designed to validate a string (likely a domain name, bucket name, or similar) by enforcing specific constraints on allowed characters and patterns. Here's a breakdown of the restrictions:

Allowed:

Lowercase Letters (a-z)

Digits (0-9)

Hyphens (-), but with restrictions (see below).

Length:

The total length of the string must be between 1 and 64 characters.

Not Allowed:

Prefix Restrictions:

The string must not start with:

"xn--" (Reserved for internationalized domain names)

"sthree-"

"sthree-configurator"

Suffix Restrictions:

The string must not end with:

"-s3alias"

"--ol-s3"

Forbidden Character Sequences:

Double dots (..)

Double hyphens (--)

Double underscores (__)

Hyphen followed by a dot (.-)

Dot followed by a hyphen (-.)

Trailing hyphen (-$)

Format Constraints:

Must start with a lowercase letter (a-z) or digit (0-9).

Must end with a lowercase letter (a-z) or digit (0-9).

Can contain hyphens (-), but not at the start or end.

⁠

Examples:

✅ Valid Strings:

valid-name

bucket123

abc-def-ghi

a1-b2-c3

simpletest

❌ Invalid Strings:

xn--example (Starts with "xn--")

sthree-example (Starts with "sthree-")

sthree-configurator-test (Starts with "sthree-configurator")

invalid-s3alias (Ends with "-s3alias")

test--name (Contains "--")

double..dot (Contains "..")

bad__underscore (Contains "__")

hyphen-.dot (Contains "-.")

dot-.hyphen (Contains "-.")

trailinghyphen- (Ends with "-")

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