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18:22:33 xcoder
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18:22:40 xcoder
Hello!
18:23:12 marc
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18:23:18 xcoder
Anyone here ?
18:23:46 xcoder
Why response in XML ?
18:23:52 xcoder
Why not JSON ?
18:24:02 xcoder
Is XML faster than JSON !
18:24:27 eta
xcoder: they're about equal!
18:24:48 eta
xcoder: read https://xmpp.org/about/myths.html
18:24:50 xcoder
Not equal !
18:25:12 xcoder
JSON is easy to read , delivered fast than xml.
18:25:57 eta
those are both subjective, arbitrary metrics
18:26:08 j.r
> JSON is easy to read
Modern hypster webdev in a nutshell...
18:26:14 eta
j.r: quite :p
18:26:50 xcoder
Which one you would use in a project ?
18:26:51 Zash
> hypster
Haha, amazing word
18:27:00 xcoder
😛
18:27:22 xcoder
This is not my question btw.
18:27:35 xcoder
I asked why xmpp server using xml in response ?
18:27:49 pep.
Because that's how XMPP is specified?
18:27:51 xcoder
I trace the the response using console.
18:27:58 j.r
If you have a bit more complex (nested) stuff JSON becomes really bad to read in my eyes... but yeah it's subjective
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18:28:03 eta
xcoder: well XMPP is much older than modern JSON-using applications
18:28:11 eta
s/applications/protocols/
18:28:28 eta
it's also naturally extensible (via namespaces), which has allowed the protocol to adapt
18:28:40 xcoder
I read an article about xmpp, "Whatsapp using ir".
18:28:46 xcoder
Is that right ?
18:28:47 eta
(if you think JSON is also extensible, look at the tire fire that is JSON-LD)
18:29:43 Zash
WhatsApp is based on XMPP with a custom compression scheme.
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18:30:23 Zash
Zoom is also based on XMPP. And Google Talk, and LoL, and lots of things.
18:30:32 eta
(and Jitsi Meet)
18:33:03 xcoder
Also i see a request repeated after 10 s to get the updates, what makes it different form normal setInterval !
18:33:35 pep.
what?
18:33:41 Zash
Are you looking at the BOSH requests?
18:33:51 xcoder
Yes :V
18:34:11 Zash
It's using long-polling
18:34:14 eta
Zash: (does BOSH use lo---
18:34:16 eta
snap
18:34:19 xcoder
I know.
18:35:15 xcoder
Any communication application using long polling to get the updates the difference is the method.
18:35:39 xcoder
What i noticed , is there no lag.
18:36:06 xcoder
Normal SetInterval makes lag after some minutes of initialization.
18:36:07 Zash
Because the long-polling. The request isn't answererd until there's something new.
18:36:32 Zash
(or a timeout, in which case it does another request)
18:37:08 pep.
xcoder, pulling at predefined intervals wouldn't be able to get payloads faster or slower as necessary ✎
18:37:24 pep.
xcoder, pulling at predefined intervals wouldn't allow to get payloads faster or slower as necessary ✏
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18:37:51 Zash
It could also use websockets. Or plain TCP.
18:38:00 xcoder
Which is more preferable [sockets - setinterval]
18:38:20 pep.
setInterval has nothing to do with protocol, that's a JS function
18:38:35 xcoder
I'm a web developer.
18:38:42 pep.
Surely you could use that to implement some really bad long-polling
18:39:09 Zash
There was "normal" polling back one billion years ago, but I don't think anyting uses that anymore.
18:39:20 xcoder
Sockets can consume more memory ?
18:39:56 xcoder
I never tried sockets so i can't judge it.
18:40:09 xcoder
I'm asking if anyone has the experience.
18:40:11 Zash
BOSH consumes more bandwidth, since you can't idle for very long before doing another connection, also more overhead with HTTP headercs and stuff.
18:40:43 Zash
But BOSH is also more tolerant of network issues, IP address changes, or navigation to different web page.
18:42:32 marc
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18:43:19 Zash
Desktop applications would use normal TCP sockets. Probably similar to websockets in overhead and stuff.
18:44:05 xcoder
So what's the recommended resources if i want to build large chat system [text - audio - video]
18:44:32 Zash
Hire a large team of experts.
18:45:01 xcoder
"Resources" not experts.
18:45:19 Zash
Human Resources :P
18:45:31 xcoder
I already developed many chat system, but not high traffic.
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18:47:40 Guus
Don't reinvent the wheel, use one of the many available implementations.
18:48:19 Guus
That saves you a lot of resources
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18:48:37 xcoder
I'm asking what is the "infrastructure" that whatsapp,imo,telegram are using.
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18:48:40 Zash
https://xmpp.org/uses/instant-messaging.html and https://xmpp.org/uses/webrtc.html of any use?
18:48:43 pep.
And don't forget to contribute back ✎
18:48:54 pep.
And don't "forget" to contribute back ✏
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18:49:29 Zash
IIRC whatsapp was using a heavily customised ejabberd in the beginning, no idea what they're doing now
18:49:59 Guus
xcoder: to get started, install one of the freely available xmpp servers, and a client of choice. If you're into web, start with a web client like Converse.
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18:50:26 Guus
If you are things in action, you can learn how to adapt things to your needs.
18:51:21 Guus
That gives you a pragmatic approach, that you can actually see do something.
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18:53:03 xcoder
Zash thanks for the link.
18:54:16 xcoder
Guus, Yes i will use one of these servers just a start.
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18:59:24 vanitasvitae
xcoder: if you think about implementing some feature, take a look at the wide range of existing protocol extensions before doing your own thing 😃
19:00:26 xcoder
Are you ios developer ?
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19:02:23 vanitasvitae
xcoder: luckily not :P
19:03:19 xcoder
😒
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