Validate Minio Bucket names.

minio-bucket-name-validator.js

function isValidBucketName(bucketName) {
    if (typeof bucketName !== 'string') return false

    // bucket length should be less than and no more than 63
    // characters long.
    if (bucketName.length < 3 || bucketName.length > 63) {
        return false
    }
    // bucket with successive periods is invalid.
    if (bucketName.indexOf('..') > -1) {
        return false
    }
    // bucket cannot have ip address style.
    if (bucketName.match(/[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+/)) {
        return false
    }
    // bucket should begin with alphabet/number and end with alphabet/number,
    // with alphabet/number/.- in the middle.
    if (bucketName.match(/^[a-z0-9][a-z0-9.-]+[a-z0-9]$/)) {
        return true
    }
    return false
}

Rules:

1. Length should be between 3 and 69 characters,
2. Names with successive periods are invalid (..),
3. Cannot have IP address style,
4. Should begin with alphabet/number and end with alphabet/number (No uppercase)