prosody
6d6291dfe735
util/id.lua

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util/id.lua @ 13319:6d6291dfe735

net.http: Add simple connection pooling This should speed up repeated requests to the same site by keeping their connections around and sending more requests on them. Sending multiple requests at the same time is not supported, instead a request started while another to the same authority is in progress would open a new one and the first one to complete would go back in the pool. This could be investigated in the future. Some http servers limit the number of requests per connection and this is not tested and could cause one request to fail, but hopefully it will close the connection and prevent it from being reused.
author Kim Alvefur <zash@zash.se>
date Sat, 11 Nov 2023 23:08:34 +0100
parent 12975:d10957394a3c
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9546c629289b util.id: New util for producing random identifiers of varying sizes
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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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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
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22 -- for short lived things with low risk of collisions
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23 tiny = function() return b64url_random(3); end;
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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 }