prosody
01d2abc3d17c
util/uuid.lua

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Software / code / prosody

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util/uuid.lua @ 13543:01d2abc3d17c 0.12

mod_smacks: Destroy timed out session in async context (fixes #1884) Prevents ASYNC-01 due to storage interactions in a timer. Also considered modifying mod_c2s to allow passing arbitrary closures into its runner thread but this seems like a big step away from the current code for just this module. Also considered creating a dedicated runner in mod_smacks, but ensuring continuity across module reloads might be tricky. We could further improve this in the next major version.
author Kim Alvefur <zash@zash.se>
date Sat, 02 Nov 2024 18:10:25 +0100
parent 12355:a0ff5c438e9d
child 12975:d10957394a3c
line wrap: on
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-- 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".encode;
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;
};