check if string is base64

Question

i may recieve these two strings:

    base = Base64.encode64(File.open(\"/home/usr/Desktop/test\", \"rb\").read)
    => \"YQo=\\n\"

    string = File.open         


        

Answer 1

You can use something like this, not very performant but you are guaranteed not to get false positives:

require 'base64'

def base64?(value)
  value.is_a?(String) && Base64.encode64(Base64.decode64(value)) == value
end