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util/id.lua @ 13028:b2e6a175537d
mod_debug_reset: Don't delay operations until next tick
For some unknown reason, this was required with the old mock util.time
functions prior to 012d6e7b723a.
After 012d6e7b723a, it breaks. So I'm happy to revert to not delaying
anything. This makes tests pass again.
author | Matthew Wild <mwild1@gmail.com> |
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date | Thu, 06 Apr 2023 14:17:50 +0100 |
parent | 12975:d10957394a3c |
rev | line source |
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8016
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util.id: New util for producing random identifiers of varying sizes
Kim Alvefur <zash@zash.se>
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1 -- Prosody IM |
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2 -- Copyright (C) 2008-2017 Matthew Wild |
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3 -- Copyright (C) 2008-2017 Waqas Hussain |
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4 -- Copyright (C) 2008-2017 Kim Alvefur |
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5 -- |
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6 -- This project is MIT/X11 licensed. Please see the |
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7 -- COPYING file in the source package for more information. |
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8 -- |
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9 |
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10 local s_gsub = string.gsub; |
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util: Prefix module imports with prosody namespace
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11 local random_bytes = require "prosody.util.random".bytes; |
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12 local base64_encode = require "prosody.util.encodings".base64.encode; |
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13 |
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14 local b64url = { ["+"] = "-", ["/"] = "_", ["="] = "" }; |
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15 local function b64url_random(len) |
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16 return (s_gsub(base64_encode(random_bytes(len)), "[+/=]", b64url)); |
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17 end |
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18 |
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19 return { |
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20 -- sizes divisible by 3 fit nicely into base64 without padding== |
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21 |
12111 | 22 -- for short lived things with low risk of collisions |
23 tiny = function() return b64url_random(3); end; | |
24 | |
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25 -- close to 8 bytes, should be good enough for relatively short lived or uses |
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26 -- scoped by host or users, half the size of an uuid |
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27 short = function() return b64url_random(9); end; |
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28 |
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29 -- more entropy than uuid at 2/3 the size |
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30 -- should be okay for globally scoped ids or security token |
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31 medium = function() return b64url_random(18); end; |
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32 |
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33 -- as long as an uuid but MOAR entropy |
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34 long = function() return b64url_random(27); end; |
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35 |
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36 -- pick your own adventure |
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37 custom = function (size) |
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38 return function () return b64url_random(size); end; |
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39 end; |
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40 } |