prosody
0dc80024fdd2
util/uuid.lua

Find changesets by keywords by author, files, the commit message, revision number or hash, or revset expression.

Software / code / prosody

File

util/uuid.lua @ 12739:0dc80024fdd2

Backed out changeset 1bc2220cd6ec The use of the error helpers creates an `<error/>` child element containing the error condition. This is however not allowed as per XEP-0198, which specifies that the error condition is to be a direct child of the `<failed/>` stream management element. This has triggered a fun reconnect loop in aioxmpp where it was reported by a user [1]. [1]: https://github.com/horazont/aioxmpp/issues/382
author Jonas Schäfer <jonas@wielicki.name>
date Mon, 03 Oct 2022 12:55:11 +0200
parent 12355:a0ff5c438e9d
child 12975:d10957394a3c
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".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;
};