XMPP Service Operators - 2017-12-11

edhelas: block multi line messages from strangers. Also pastebin links

how ?

Bother ejabberd devs about porting mod_firewall?

edhelas: migrate to prosody! 🤣

eheh

> Code expressions are powerful, and allow unconstrained access to Prosody's internal environment. This part will be non-trivial to port :-)

Just include all of Prosody

And I'm not sure I'd go for Lua patterns rather than regular expressions. So I guess real-world rule sets wouldn't work unmodified.

That said, I'm thinking about porting this as well.

Zash: :-)

Lua patterns are roughly a subset of regular expressions

And probably is, in the language theory sense

People tend to think of PCRE and similar when they hear "regular expressions"

Well you can't pipe them as-is into regex functions.

Zash: So do I :-)

A bunch would work if you s/%/\\/

Notable exceptions are - which is like *? and %bxy which is ... not regular IIRC

Yes I know them, I did quite a bit of Lua actually (before Prosody even existed) :-)

They're just fine, I'm just unsure implementing them (or loading 'luerl' just for this purpose) would be worth it.

PCRE is supposedly huge compared to the Lua pattern implementation

Absolutely, but it's loaded anyway.

Apart from that the syntax is probably more familiar to most admins.

Then again, my only goal in implementing this would be loading Georg's rules, so what do I care about admins.

I feel like doing PCRE in a network firewall type situation is a bad idea; you're just going to end up with administrators writing rules that will trigger infinite recursion when people send malicious packets

You probably want actually-regular regular expressions that can run in linear time (there's probably a word for that)

And how much of mod_firewall you wanna be compatible with

sam: That might actually be "regular expressions"

Zash: "real regular expressions"?

But I haven't studied this, so what do I know

Huh, I wonder why my name is "sam" all of a sudden.

Who are you?

???

An imposter

!!

my mcabber config has not changed; maybe the wrong value is stored int he bookmark or something.

Oh, it thinks my nickname is already in use… that's odd, my phone is not using it, so I have no idea what I left logged in.

Test

That's better.

https://en.wikipedia.org/wiki/File:Chomsky-hierarchy.svg

That stuff

https://en.wikipedia.org/wiki/Regular_language#Formal_definition

Maybe I'll start calling them "regular regular expressions", since the first regular is ignored by Perl et al. and apparently is meaningless

SamWhited: just call them cat expressions, because they look like typed by a cat running over the keyboard

Ge0rG: this is true, but that doesn't distinguish them from PCRE style regular expressions, or anything written in Erlang.

catjabberd

JabberCat

That sounds familiar

https://github.com/jabbercat/jabbercat