Hi Christian, On Samstag, 24. Februar 2018 20:22:39 CET Christian Schudt wrote: > I’ve got a question about XEP-0153. Its XML schema defines that the photo > hash is encoded as Base64: > > <xs:element name='photo' minOccurs='0' type='xs:base64Binary‘/> > > However, I’ve seen the hash encoded as hexadecimal, too. It was no small > client, but it was Facebook. I don’t know how other clients behave. > > So I wonder, what is the correct encoding of the photo hash value: base64 or > hex-encoded?
Now this is fun. First of all, the mantra: The Schemas Are Not Normative. Second: I could’ve sworn that there was some text which specified something like lower-case hex. But apparently there is none. Grepping through the presence I get from all my contacts, all of them are doing lower case hexadecimal. When we implemented it in aioxmpp, we thus also went for lower case hexadecimal. So I think we need to update the spec according to its current usage. Especially since we’re recommending to support it at least read-only. Any objections to me adding a clarification in this regard? kind regards, Jonas
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