prosody
364c3f018e3a
util/uuid.lua

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Software / code / prosody

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util/uuid.lua @ 11937:364c3f018e3a

mod_smacks: Refactor ack requesting to avoid some timer roundtrips The function was too large to comprehend! Breaking it up helps readability and reuse. The timer round rip is only to avoid ordering weirdness when sending from inside a stanza filter. No need when handling <r> and <a> CSI interactions both boiled down to sending an <r> immediately.
author Kim Alvefur <zash@zash.se>
date Wed, 24 Nov 2021 21:27:49 +0100
parent 7078:ec17115e3721
child 12355:a0ff5c438e9d
line wrap: on
line source

-- Prosody IM
-- Copyright (C) 2008-2010 Matthew Wild
-- Copyright (C) 2008-2010 Waqas Hussain
--
-- This project is MIT/X11 licensed. Please see the
-- COPYING file in the source package for more information.
--

local random = require "util.random";
local random_bytes = random.bytes;
local hex = require "util.hex".to;
local m_ceil = math.ceil;

local function get_nibbles(n)
	return hex(random_bytes(m_ceil(n/2))):sub(1, n);
end

local function get_twobits()
	return ("%x"):format(random_bytes(1):byte() % 4 + 8);
end

local function generate()
	-- generate RFC 4122 complaint UUIDs (version 4 - random)
	return get_nibbles(8).."-"..get_nibbles(4).."-4"..get_nibbles(3).."-"..(get_twobits())..get_nibbles(3).."-"..get_nibbles(12);
end

return {
	get_nibbles=get_nibbles;
	generate = generate ;
	-- COMPAT
	seed = random.seed;
};