prosody
c93fdec624c7
util/uuid.lua

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Software / code / prosody

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util/uuid.lua @ 9948:c93fdec624c7

net.http.files: Copy of mod_http_files The intent is to make it easier to reuse and simplify mod_http_files. Currently modules will use the serve() function exported by mod_http_files in order to serve their own files. This makes it unclear whether mod_http_files should be doing anything on its own. Moving the logic into a separate module should help here, as well as make re-use outside of prosody easier.
author Kim Alvefur <zash@zash.se>
date Fri, 05 Apr 2019 16:10:51 +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;
};