`module Base64`

Base64: the encodings of RFC 4648, standard and URL-safe.

require "base64"
Base64.encode("quarz")                # => "cXVhcno="
Base64.decode("cXVhcno=").decode      # => "quarz"
Base64.urlsafe_encode(b"\xfb\xff")    # => "-_8="

Each encoder takes Bytes or a String (its UTF-8 bytes) and gives a String without line breaks; each decoder gives Bytes and raises ArgumentError on a character outside its alphabet or a malformed end.

<std:base64>:13

Class methods

`def self.encode(data: Bytes | String) -> String`

data in the standard alphabet (+ and /), padded with =.

Base64.encode("ab")   # => "YWI="

<std:base64>:19

`def self.decode(text: String) -> Bytes`

The bytes text encodes in the standard alphabet. The padding may be left out, but not cut short; whitespace is not allowed.

Base64.decode("YWI=")    # => b"ab"
Base64.decode("YWI")     # => b"ab"
Base64.decode("Zg=")    # raises ArgumentError
Base64.decode("Y W I")   # raises ArgumentError

<std:base64>:30

`def self.urlsafe_encode(data: Bytes | String, *, padding: Bool = …) -> String`

data in the URL-safe alphabet (- and _), padded with = unless padding is false.

Base64.urlsafe_encode("ab", padding: false)   # => "YWI"

<std:base64>:38

`def self.urlsafe_decode(text: String) -> Bytes`

The bytes text encodes in the URL-safe alphabet, padded or not.

Base64.urlsafe_decode("-_8")   # => b"\xfb\xff"

<std:base64>:45