anyone here got a function to find is a string is base64 encoded?

[Wouter]

	• 	From: Mark Brownell
	• 	 Subject: Re: anyone here got a function to find is a string is 
base64 encoded?
	• 	 Date: Sun, 25 Jul 2004 18:02:48 -0700
>
> -- snip
>
>  I use base64 for making text and binary data websafe. Knowing what my 
> file format is makes it easy by file types and file extensions. This 
> is fine for my needs but lousy for generic or unknown files. I was 
> using numbers and spaces to get around the 32 kbt per line problem in 
> fields. I now see that the spaces are not websafe. You could encounter 
> spaces in attributes within well-formed XML. I guess what I'm saying 
> is that if space is present then it can't be base64. I understand the 
> need to verify every character though. You are trying to rule out that 
> it can't be base64, I guess.
>
>
> Mark

Nope. Even spaces in the string won't harm the decoding. But it is not 
*welfomed*.
The cutting up of a base64Encoded string in blocks of 72 chars is done 
in MC/RR (to accomodate putting it in a field?). But it is no necessity 
for the base64Decode function, as this takes out every  char not in the 
[1 - 9] + [a-Z]  + "+" exept for the slash and the "=" (and may be some 
other typable char, but I didn't test them all yet).

Wouter