> On 7 Feb 2025, at 9:54 AM, Bob Sneidar via use-livecode > <use-livecode@lists.runrev.com> wrote: > > Hi Monte. > > Are you saying a base64encode string CAN contain the characters you listed? > I’m talking about dash, underscore and equal. Or is that reference saying > that plus and minus (dash) are interchangeable, along with the slash and > underscore respectively?
Hi Bob I’ll add some comments to the function to explain function urlSafeBase64 pData local tEncoded put base64Encode(pData) into tEncoded // The engine’s base64Encode function formats the result as required for // base 64 Content-Transfer-Encoding as discussed in RFC 4648 // section 3.1 and has linefeeds at 76 characters so remove replace return with empty in tEncoded // The engine’s base64Encode encodes using the alphabet in RFC 4648 // section 4 and needs to be mapped to the alphabet in section 5 replace "+" with "-" in pData replace "/" with "_" in pData // = is used to pad base 64 encoded data and in many circumstances is not // required. This could be an option on this function because it is valid in // url safe base 64 as long is it is percent encoded after replace "=" with empty in tEncoded return tEncoded end urlSafeBase64 > > Bob S > > >> On Feb 6, 2025, at 1:51 PM, Monte Goulding via use-livecode >> <use-livecode@lists.runrev.com> wrote: >> >> Hi Bob >> >>> On 7 Feb 2025, at 3:28 AM, Bob Sneidar via use-livecode >>> <use-livecode@lists.runrev.com> wrote: >>> >>> I don’t see any of those characters on base64encoded strings. >> >> >> They definitely can be int there. Se RFC 4648 section 4 and 5 encoding >> tables for reference. >> >> https://datatracker.ietf.org/doc/html/rfc4648#section-5 >> >> Cheers >> >> Monte >> >> >> _______________________________________________ >> use-livecode mailing list >> use-livecode@lists.runrev.com >> Please visit this url to subscribe, unsubscribe and manage your subscription >> preferences: >> http://lists.runrev.com/mailman/listinfo/use-livecode > > _______________________________________________ > use-livecode mailing list > use-livecode@lists.runrev.com > Please visit this url to subscribe, unsubscribe and manage your subscription > preferences: > http://lists.runrev.com/mailman/listinfo/use-livecode _______________________________________________ use-livecode mailing list use-livecode@lists.runrev.com Please visit this url to subscribe, unsubscribe and manage your subscription preferences: http://lists.runrev.com/mailman/listinfo/use-livecode
