jdev - 2021-07-25

Hello everyone, please someone help how I can create an xmpp server in php? Thank you

Lol

That name

no it's mistake

Step 1: figure out if there's a library you can use Step 2: if not, read the standards (start with RFC 6120) Step 3: figure out how to do that in PHP Step 4: ??? Step 5: profit?

Also, is it true that XMPP S2S does multicasting in an inefficient way?

Aka, not multicasting at all but just unicasting

there is in theory a thing which allows multicasting

but in the vision of many smaller servers, it's rarely useful

see https://xmpp.org/extensions/xep-0033.html

On PSYC they mentioned multicssting issues in XMPP

But I haven't really noticed any performance issues of XMPP, but I don't have over 100 contacts or rooms, so

And even then, is it noticeable?

Meanwhile, on Matrix, the performance issues are very clear

Joining the Matrix HQ room will make self-hosted servers explode

so multicasting would only be benificial if server A has a lot of users which are in a room on server B

then server B could be smart about it and tell server A a list of addresess to multicast the room traffic to

but even in the largest rooms, I doubt that there are more than 20-40 entities from the same server.

so the difference between copying a stanza 20-40 times (and with that, saving a lot of headaches around security considerations if the users have different privileges; I guess you'd have to shard by privileges, too, reducing the multicastability further) and actually doing multicast is rather slim

especially because it only affects s2s links which are generally high-bandwidth and low-latency

(and it doesn't make any difference for any permanant storage or so)

How does IRC do it?

It only really seems to matter on either very huge rooms, or very bad connections, and for the latter there’s FMUC.

IRC doesn’t do it in any standard way.

But, roughly speaking, IRC does something more akin to FMUC.

isn't s2s for IRC mostly unspecified?

"IRC doesn’t do it in any standard way."

Although that doesn’t matter so much, because IRC doesn’t have open federation. It’s best not to think of IRC so much as federated like XMPP as being a clustered service, like a single XMPP service.

I know. I didn't mean if IRC was federated in that way. I was just wondering how IRC does multicasting.

I believe somewhat similar to how FMUC does it.

There's also DMUC2

I’m not aware of anyone ever implementing any of the DMUC proposals, though.

Whereas FMUC is implemented and deployed (albeit not, that I’m aware of, on the Internet).

Where then?

Places that have heavily constrained connections.

Any examples?

Not that I think I can talk about, sorry.

It's top secret?

Something like that.

hi every one

hi every one .. so i'm trying to build a chat app just like whatsapp.. i have my own ejabberd server .. i want that users sign up with there phone number and do all the work in backend(giving them jid and password)... Do i need an other server to assure the authentification? or just ejabberd server can do the work