Regex for AWS S3 Bucket Name

javascript

const regex = /^[a-z0-9][a-z0-9.-]{1,61}[a-z0-9]$/;
const isValid = regex.test(value);

python

import re
pattern = r'^[a-z0-9][a-z0-9.-]{1,61}[a-z0-9]$'
if re.match(pattern, value):
    print("valid")

ruby

pattern = /^[a-z0-9][a-z0-9.-]{1,61}[a-z0-9]$/
if value =~ pattern
  puts "valid"
end

php

if (preg_match('/^[a-z0-9][a-z0-9.-]{1,61}[a-z0-9]$/', $value)) {
    echo "valid";
}

java

String pattern = "^[a-z0-9][a-z0-9.-]{1,61}[a-z0-9]$";
boolean isValid = value.matches(pattern);