jdev - 2021-11-10

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  146. Sam Is there anyone who has done an implementation of Message Styling that would be interested in using a shared set of unit tests to ensure compatibility?
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  223. nephele Sam: What do the unit tests do, check the rendering of items or so?
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  258. Sam nephele: yah, they take in a message and spit out what parts of the message should have what styles
  259. nephele Ah, so it's unit tests for the parser part
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  264. nephele Are these for https://xmpp.org/extensions/xep-0393.html ?
  265. Sam yes
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  267. nephele I am reading it, I'm quite lost on what a child block is, is this only in reference to nested quotes?
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  269. nephele Anyway, I want to implement message formatting for Renga at some point or another, If i can figure out how to include unit tests that could be quite neat to have the same ones
  270. pulkomandy you can have unit tests in Renga by comparing the text_run_array in a BView with the expected output from the test, I guess? Sounds possible to do at least
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  273. nephele I'm not sure if something like quotes could be represented with a text_run_array
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  332. lovetox the more i look into python xml libs the more i believe xmpps decision to not use prefixes is actually the weird thing that nobody does
  333. lovetox i think one can say there i almost no support in libs for so called "default" namespaces
  334. lovetox pythons etree.Element, has no way of setting a default namespace, nor parsing it
  335. lovetox lxml supports them better, but it still fills like something which is a second class citizen
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  356. MattJ lovetox, I've no idea what you mean... an XML library either supports namespaces or it doesn't. XMPP doesn't do anything weird, and there's not really any such thing as a "default namespace" in XML (actually there is, but let's not go there)
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  358. lovetox i also thought that, but its not the case, or it depends what you mean by supports
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  360. lovetox if you parse that with pythons included xml lib
  361. lovetox '<a xmlns="test" />'
  362. lovetox you get an object and if you serialise it back its
  363. lovetox '<ns0:a xmlns:ns0="test" />'
  364. Zash why the
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  366. Trbl fk would you implement xmpp in python
  367. flow looks like a valid transformation?
  368. Zash looks like an excellent way to convince people that xml is scary and to use json instead
  369. flow even though not an optimal one
  370. lovetox flow how does that help me if xmpp says i should use no prefixes :D
  371. Trbl should or must
  372. Trbl i'd just say fuck it if its the first case
  373. flow probably not much, but then again, I think, at least those kind of prefixes are fine
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  375. flow a different (and desirable) kind of prefixes are the ones that a declare in <stream/>
  376. flow a different (and desirable) kind of prefixes are the ones that a declared in <stream/>
  377. flow those are probably likely to cause issues with certain impelementations
  378. flow but not the prefixes that are introduced by the transformation you showed
  379. flow assuming they are only done on a sub <stream/> level
  380. lovetox so every server will be ok if i send
  381. lovetox <ns0:message xmlns:ns0="jabber:client" />
  382. lovetox because that would be great :D
  383. Zash Prosody will be fine. ``` > util.xml.parse[[<ns0:message xmlns:ns0="jabber:client" />]] <message xmlns='jabber:client'/> ```
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  385. flow lovetox, maybe not every server, but chances are high that the XML parser on the receiving end will handle it just fine
  386. flow but still, the transformation is not space-efficient, so you may want to avoid it
  387. flow maybe there is simple switch to change the behavior of serialiser?
  388. Zash space-efficiency would be to stuff a ton of namespace prefixes on the stream header
  389. Zash `<sm:r/>` etc
  390. flow sure, but let's do baby step and get this fixed first
  391. flow sure, but let's do baby steps and get this fixed first
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  393. flow Zash, would prosody support namespace declartions in <stream/>? if so, announce it as stream feature and I'll implement an optimization in Smack for it
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  395. Zash All that's handled transparently by libexpat, so should work fine
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  397. Zash The receiving/parsing side at least.
  398. flow Zash, then we should consider specifying a stream feature for this. so that clients can safely perform this optimization
  399. flow as I have heard that other servers bail on it
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  403. Zash Sure
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  406. MattJ But the stream feature comes after the client already sent the opening stream header...
  407. Zash Save it for the post-sasl stream restart
  408. Zash assuming we still have a stream restart in the future
  409. MattJ Carry state between the unauthed and authed streams?!
  410. Zash 😱️
  411. Zash Maybe, one day, we should redesign the whole stream startup thing.
  412. flow if it's an non-TLS connection that its fine
  413. flow otherwise you have to announce the feature after TLS
  414. flow but before auth
  415. flow I think this should be safe?
  416. Zash Make it client-first, where it sends all the extensions it wants, and the server picks the parts it likes
  417. MattJ version='2.0'
  418. Zash Since this is the server telling the client things _after_ it has been authenticated with TLS & certs
  419. Zash no wait
  420. Zash aaaaargh, everything is backwards
  421. Zash or
  422. Zash so confused
  423. Zash Server does advertise things after it has been authenticated. Then the client authenticates. And then it does the thing.
  424. Zash So, should be fine?
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  428. flow simply in the stream features of step 8 in RFC 6120 § 9.1.1
  429. flow then the client can declare the namespaces in step 13
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  431. flow so besides the <mechanisms/> in <stream:features/> you have a <namespace-prefixes-in-stream/> flag
  432. Zash as a bonus, after the restart, throw in a namespaced attribute on the opening stream header to tell the server it's okay to do the same thing
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  434. Zash `<stream:stream to="example.com" ns:prefixes="ok" xmlns:ns="urn:xmpp:tbd:namespaces-prefixes">` something something
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