jdev - 2020-03-27

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  167. Jeybe

    To check supported xeps on a specific server one needs to be logged in, correct?

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  170. flow

    Jeybe, depends, simply querying the disco#info of the server's address may already reveal most XEPs

  171. flow

    but obviously not the ones that are only exposed to users of this service

  172. Jeybe

    To mention, I'm completely new to XMPP development (and so the conrecte XMPP and XEP specs) and mostly new to development in general. The XEPs I'd like to check are the ones from the Compliance Suite

  173. flow

    Jeybe, well you could simply get the source code of the compliance checker and look how the checker does it

  174. Ge0rG

    Jeybe: some relevant features like Push and MAM are probably only visible on your own account JID, not on the server JID

  175. Ge0rG

    so yes, you need to have an account

  176. Jeybe

    Ok thx

  177. Jeybe

    Makes sense, as for the tester on compliance.conversations.im also needs account credentials

  178. Ge0rG

    the code behind is https://github.com/iNPUTmice/caas

  179. flow

    thats why I am in favor of stuffing those features also in the disco#info response of the service's address: you don't need to have an account to check how widespread an xep/feature is implemented

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  247. pep.

    left: `"<root xmlns=\"root_ns\" a=\"b\" xml:lang=\"en\">meow<child c=\"d\"/><child xmlns:ns0=\"child_ns\" d=\"e\" xml:lang=\"fr\"/>nya</root>"` right: `"<root xmlns=\"root_ns\" a=\"b\" xml:lang=\"en\">meow<child c=\"d\"/><child xmlns=\"child_ns\" d=\"e\" xml:lang=\"fr\"/>nya</root>"`'

  248. pep.

    People doing xml properly in their stack, what version would use the less bytes in the general case?

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  250. pep.

    Here for sure it's the right one, but in XMPP it's quite common to reuse jabber:client right

  251. pep.

    So I'd rather not shadow it

  252. flow


  253. flow


  254. flow


  255. pep.

    yeah sorry, that's the output of my tests :)

  256. flow

    pep this is about XML serialization, right?

  257. pep.


  258. flow

    I think I would simply use the prefix if it already exists, otherwise not

  259. pep.

    left: `#"<root xmlns="root_ns" a="b" xml:lang="en">meow<child c="d"/><child xmlns:ns0="child_ns" d="e" xml:lang="fr"/>nya</root>"#` right: `#"<root xmlns="root_ns" a="b" xml:lang="en">meow<child c="d"/><child xmlns="child_ns" d="e" xml:lang="fr"/>nya</root>"#`'

  260. pep.

    here, without the escaping

  261. pep.

    flow, not what I'm asking

  262. pep.

    or maybe with this you mean I shouldn't shadow

  263. pep.

    and prefer the left version

  264. flow

    where is something shadowed in the left/right examples you showed?

  265. pep.

    In the right example the child xmlns shadows root's

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  267. pep.

    the second child

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  269. pep.

    Which means if this child has descendants, I won't be able to reuse root's ns without redeclaring it

  270. flow


  271. flow

    but in xmpp we tend to not re-use jabber:client once an extension element namespace has been declared

  272. flow

    <forwarded/> being one prominent exception

  273. Link Mauve

    An exception would be forwarded or MIX.

  274. flow

    ahh MIX, really?

  275. Link Mauve


  276. flow

    cause its in pubsub potentially

  277. flow

    anyway, I am not sure what you are asking, or if there is a generic answer to your question

  278. Link Mauve

    Presence in PubSub! \o/ <items node='urn:xmpp:mix:nodes:presence'> <item id='123456#coven@mix.shakespeare.example/UUID-x4r/2491'> <presence xmlns='jabber:client'> <mix xmlns='urn:xmpp:presence:0'> <jid>hecate@shakespeare.example/UUID-x4r/2491</jid> <nick>thirdwitch</jid> </mix> <show>dnd</show> <status>Making a Brew</status> </presence> </item> </items>

  279. flow

    but if your codebase is so far feature complete that you think about saving bytes… ;)

  280. pep.

    flow, no I'm just curious, I have to make a choice :P

  281. Link Mauve

    pep., what I’d do would be to let the user declare the prefixes they want on the root <stream:stream>, if XEP-0044 negociated it’s allowed, and only use prefixed elements if their namespace has been defined there.

  282. pep.

    My implementation does left at the moment

  283. pep.

    But our tests do right

  284. flow

    pep: smack would (potentially) prefix presence in this case

  285. flow

    with the rule I mentioned before

  286. pep.

    let me test on real data

  287. pep.

    Link Mauve, minidom doesn't have the knowledge of "stream header" or not

  288. Link Mauve

    pep., yeah, so it should be handled at another layer, which is why I said “let the user”.

  289. pep.

    Sure, with the new API I let the user define custom prefixes

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  296. pep.

    <stream:stream xmlns:stream="http://etherx.jabber.org/streams" xmlns="jabber:client"><message><body/><replace xmlns:ns0="urn:xmpp:message-correct:0"/></message></stream:stream>

  297. pep.

    hmm, ns0 is indeed useless here.

  298. pep.

    And message and body just reuse the default ns

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  307. pep.

    wait, this is not valid. it should be ns0:replace

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