From: Mark Hubbart <discord@...>
Date: 2004-07-15T08:43:14+09:00
Subject: Re: How to encode binary for http.post()

Oops. Sorry to reply to my own post. I made a mistake.

On Jul 14, 2004, at 11:34 AM, Mark Hubbart wrote:

> something like this:
>
>   require 'base64'
>     => nil
>   def Base64.encode64url(str)
>     Base64.encode64(str).tr("+/","-_")
>   end
>     => nil
>   def Base64.decode64url(str)
>     Base64.decode64(str.tr("-_","+/"))
>   end
>     => nil
>   (data = (0..255).inject(""){|a,v|a<<v}).size # all bytes from 0 to 
> 255
>     => 256
>   (encoded = Base64.encode64url(data)).count "+/" # any prohibited 
> characters?
>     => 0
>   # raise error if encoded data is incorrect
>
>     => 0

the last line should be:
   x=0; Base64.decode64url(encoded).each_byte{|b| raise if x!=b; x=b+1}; 
0
     => 0

(I copied from various places in my testing window; I didn't check for 
consistency)

cheers,
Mark