Module: Asciidoctor::Diagram::Base64

Defined in:
lib/asciidoctor-diagram/util/base64.rb

Class Method Summary collapse

Class Method Details

.urlsafe_decode(str) ⇒ Object 



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# File 'lib/asciidoctor-diagram/util/base64.rb', line 11

def self.urlsafe_decode(str)
  # NOTE: RFC 4648 does say nothing about unpadded input, but says that
  # "the excess pad characters MAY also be ignored", so it is inferred that
  # unpadded input is also acceptable.
  if !str.end_with?("=") && str.length % 4 != 0
    str = str.ljust((str.length + 3) & ~3, "=")
    str.tr!("-_", "+/")
  else
    str = str.tr("-_", "+/")
  end
  str.unpack1("m0")
end

.urlsafe_encode(bin, padding: true) ⇒ Object 



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# File 'lib/asciidoctor-diagram/util/base64.rb', line 4

def self.urlsafe_encode(bin, padding: true)
  str = [bin].pack("m0")
  str.chomp!("==") or str.chomp!("=") unless padding
  str.tr!("+/", "-_")
  str
end