Support XEP-0484: Fast Authentication Streamlining Tokens

[Menelmacar]

Is your feature request related to a problem? Please describe.
If the page reloads, the user is logged out and can't reconnect easily.

Describe the solution you'd like
To enhance the behavior of a reload fo the website, the browser could store a time limited secure token and reuse it to auto_reconnect. Like what prosody recently made possible: https://modules.prosody.im/mod_sasl2_fast.html

Describe alternatives you've considered
The possibility to use "reuse_scram_keys" is already a great enhancment.
a secure token would be similar in the user experience I guess, but even more secure.

[based-a-tron]

I wouldn't be opposed to looking at this if ejabberd adds support for it.

[Menelmacar]

I found a nice example of this working in practice.
This program makes use of it. The password isn't even saved in the browser as far as I see. Only the token. (but I'm no developer, so I don't know if this is helpful for conversejs or not)

https://github.com/snikket-im/snikket-sdk
https://app.cheogram.com/

[kousu]

I'm working on it ! strophe/strophejs#839

I could use a lot of help though. Javascript is not my first language, and I'm muddling through the architecture of Converse+Strophe at the same time by brute force. I got it to demo-able but it's not good.

I got a lot of help from @singpolyma ! It wasn't long ago he wrote the same patch for xmpp.js (in order to build app.cheogram.com) xmppjs/xmpp.js#1006 (comment)

[jcbrand]

Great to hear, thanks @kousu

I'll be happy to review your PR, I'll try to schedule some time for it soon.