Brandon Fredericks wrote:
I did a search within this group, but couldn't find any information on
this.
I am sending base64 encoded data as the content over http using
urllib2 urlopen. When I receive the data and attempt to decode it, I
get an "Incorrect Padding" error. Is there a simple way to fix this? A
better way to send and receive the data possibly (using base64 of
course)?
Base-64 encodes 3 bytes (echo in the range 0-255) to 4 bytes (each in a
more restricted range). The length of the output is _always_ a multiple
of 4 (ignoring whitespace); the method adds extra padding bytes (ASCII
'=') to ensure that this is the case if the length of the input isn't a
multiple of 3.
So, if decoding raises an "Incorrect Padding" error then strip out any
whitespace and append extra ASCII '=' to make its length a multiple of
3, then try decoding again. (Or you could just repeatedly add one pad
character and retry, up to 3 times.)
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