prosody
4c0802b52673
util/uuid.lua

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Software / code / prosody

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util/uuid.lua @ 11771:4c0802b52673

mod_bosh,mod_websocket: Make into global-shared modules (...again) Global modules aren't quite considered loaded onto hosts, which causes confusion in some cases. They are also reported in the log as being served on http://*:5280/foo which is also a bit confusing, and can't be clicked. Global modules also have to have their paths configured in the global section, which could be confusing and unexpected. This global+shared method should be the best of both worlds.
author Kim Alvefur <zash@zash.se>
date Mon, 21 Jun 2021 22:50:23 +0200
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;
};