Add support for RFC 4648 base64url encoding#3380
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RFC 4648 provides an alternate encoding alphabet using -_ in place of +/ to assist in produce encoded strings which do not require % encoding for including in urls. The nodejs Buffer class supports this encoding for example. This change adds support for encoding in base64url with padding included (base64urlp) and with padding excluded (base64url). The latter is provided and named to mimic the nodejs version of this encoding. This change permits base64d to decode either base64 or base64url. This also mimics nodejs which decodes both in either encoding. Also, add docs and tests for this change.
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RFC 4648 provides an alternate encoding alphabet using -_ in place of +/ to assist in produce encoded strings which do not require % encoding for including in urls. The nodejs Buffer class supports this encoding for example.
This change adds support for encoding in base64url with padding included (base64urlp) and with padding excluded (base64url). The latter is provided and named to mimic the nodejs version of this encoding.
This change permits base64d to decode either base64 or base64url. This also mimics nodejs which decodes both in either encoding.
Also, add docs and tests for this change.