Module: As2::Base64Helper

Defined in:
lib/as2/base64_helper.rb

Class Method Summary collapse

Class Method Details

.ensure_base64(string) ⇒ Object

Will base64 encoded string, unless it already is base64 encoded



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# File 'lib/as2/base64_helper.rb', line 6

def self.ensure_base64(string)
  begin
    # If string is not base64 encoded, this will raise an ArgumentError
    Base64.strict_decode64(string.gsub("\n",""))
    return string
  rescue ArgumentError
    # The string is not yet base64 encoded
    return Base64.encode64(string)
  end
end

.ensure_body_base64(multipart) ⇒ Object

If the multipart body is binary encoded, replace it with base64 encoded version



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# File 'lib/as2/base64_helper.rb', line 18

def self.ensure_body_base64(multipart)
  boundary = multipart.scan(/boundary="([^"]*)"/)[0][0]
  boundary_split = Regexp.escape("--#{boundary}")
  parts = multipart.split(/^#{boundary_split}-*\s*$/)
  signature = parts[2]
  transfer_encoding = signature.scan(/Content-Transfer-Encoding: (.*)/)[0][0].strip
  if transfer_encoding == 'binary'
    header, body = signature.split(/^\s*$/,2).map(&:lstrip)
    body_base64 = Base64.encode64(body)
    new_header = header.sub('Content-Transfer-Encoding: binary', 'Content-Transfer-Encoding: base64')
    parts[2] = new_header + "\r\n" + body_base64
    new_multipart = parts.join("--#{boundary}\r\n") + "--#{boundary}--\r\n"
    return new_multipart
  else
    return multipart
  end
end