prosody
b59aed75dc5e
util/id.lua

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Software / code / prosody

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util/id.lua @ 11309:b59aed75dc5e

mod_http_file_share: Let's write another XEP-0363 implementation This variant is meant to improve upon mod_http_upload in some ways: * Handle files much of arbitrary size efficiently * Allow GET and PUT URLs to be different * Remember Content-Type sent by client * Avoid dependency on mod_http_files * Built-in way to delegate storage to another httpd
author Kim Alvefur <zash@zash.se>
date Tue, 26 Jan 2021 03:19:17 +0100
parent 8016:9546c629289b
child 12110:b5b799a2a10c
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-- Prosody IM
-- Copyright (C) 2008-2017 Matthew Wild
-- Copyright (C) 2008-2017 Waqas Hussain
-- Copyright (C) 2008-2017 Kim Alvefur
--
-- This project is MIT/X11 licensed. Please see the
-- COPYING file in the source package for more information.
--

local s_gsub = string.gsub;
local random_bytes = require "util.random".bytes;
local base64_encode = require "util.encodings".base64.encode;

local b64url = { ["+"] = "-", ["/"] = "_", ["="] = "" };
local function b64url_random(len)
	return (s_gsub(base64_encode(random_bytes(len)), "[+/=]", b64url));
end

return {
	short =  function () return b64url_random(6); end;
	medium = function () return b64url_random(12); end;
	long =   function () return b64url_random(24); end;
	custom = function (size)
		return function () return b64url_random(size); end;
	end;
}