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From sebb <seb...@gmail.com>
Subject Re: [fileupload] towards 1.3 release - feedbacks required
Date Wed, 20 Mar 2013 10:48:15 GMT
On 20 March 2013 08:26, Simone Tripodi <simonetripodi@apache.org> wrote:
> priceless!!!
>
>> At present it treats an embedded PAD as the end of input (as per
>> Codec) but maybe it would be better to only allow 1 or 2 PADs at the
>> end?
>
> IMHO having such behaviour is acceptable, but if it doesn't cost you
> too much, having the behaviour described in Wikipedia[1] is a 'nice to
> have':

As far as I know, it already behaves as per the article, except I have
just noticed that RFC2045 requires invalid characters to be ignored.
That should be trivial to fix now that the code has been re-organised.

The article does not describe how to handle embedded PADs

> +-----------------------------------------------------------+
> Decoding Base64 with padding
> When decoding Base64 text, 4 characters are typically converted back
> to 3 bytes. The only exceptions are when padding characters exist. A
> single '=' indicates that the 4 characters will decode to only 2
> bytes, while 2 '='s indicates that the 4 characters will decode to
> only a single byte. This example illustrates:
> Encoded text ends with: YW55IGNhcm5hbCBwbGVhcw==   Block with 2 '='s
> decodes to 1 character:  any carnal pleas
> Encoded text ends with: YW55IGNhcm5hbCBwbGVhc3U=   Block with 1 '='
> decodes to 2 characters:  any carnal pleasu
> Encoded text ends with: YW55IGNhcm5hbCBwbGVhc3Vy   Block with 0 '='s
> decodes to 3 characters: any carnal pleasur
> +-----------------------------------------------------------+
>
> Thanks!
> -Simo
>
> [1] http://en.wikipedia.org/wiki/Base64
>
> http://people.apache.org/~simonetripodi/
> http://simonetripodi.livejournal.com/
> http://twitter.com/simonetripodi
> http://www.99soft.org/
>
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