ExStorageService.BucketValidator (ex_storage_service v0.6.4)

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Validates S3 bucket names and filesystem path segments.

Enforces the same naming rules as AWS S3:

  • 3–63 characters
  • Lowercase letters, numbers, hyphens, dots only
  • Must start and end with a letter or number
  • Cannot be formatted as an IP address
  • Cannot contain consecutive dots or dot-hyphen/hyphen-dot sequences

Also rejects names that could escape the data root directory via path traversal.

Summary

Functions

valid_bucket_name?(name)

Returns true if the bucket name is valid according to S3 rules and is safe to use as a filesystem directory name.

validate(name)

Returns a human-readable error message for an invalid bucket name, or :ok if the name is valid.

Functions

valid_bucket_name?(name)

@spec valid_bucket_name?(String.t()) :: boolean()

Returns true if the bucket name is valid according to S3 rules and is safe to use as a filesystem directory name.

Examples

iex> BucketValidator.valid_bucket_name?("my-bucket")
true

iex> BucketValidator.valid_bucket_name?("../escape")
false

iex> BucketValidator.valid_bucket_name?("192.168.1.1")
false

validate(name)

@spec validate(String.t()) :: :ok | {:error, String.t()}

Returns a human-readable error message for an invalid bucket name, or :ok if the name is valid.