prosody
c3fb802f9e45
util/id.lua

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util/id.lua @ 11491:c3fb802f9e45

mod_http_file_share: Report number of items in caches to statsmanager This is neat, O(1) reporting, why don't we do this everywhere? Gives you an idea of how much stuff is in the caches, which may help inform decisions on whether the size is appropriate.
author Kim Alvefur <zash@zash.se>
date Sun, 28 Mar 2021 13:15:11 +0200
parent 8016:9546c629289b
child 12110:b5b799a2a10c
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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8016
9546c629289b util.id: New util for producing random identifiers of varying sizes
Kim Alvefur <zash@zash.se>
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1 -- Prosody IM
9546c629289b util.id: New util for producing random identifiers of varying sizes
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2 -- Copyright (C) 2008-2017 Matthew Wild
9546c629289b util.id: New util for producing random identifiers of varying sizes
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3 -- Copyright (C) 2008-2017 Waqas Hussain
9546c629289b util.id: New util for producing random identifiers of varying sizes
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4 -- Copyright (C) 2008-2017 Kim Alvefur
9546c629289b util.id: New util for producing random identifiers of varying sizes
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5 --
9546c629289b util.id: New util for producing random identifiers of varying sizes
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6 -- This project is MIT/X11 licensed. Please see the
9546c629289b util.id: New util for producing random identifiers of varying sizes
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7 -- COPYING file in the source package for more information.
9546c629289b util.id: New util for producing random identifiers of varying sizes
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8 --
9546c629289b util.id: New util for producing random identifiers of varying sizes
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9
9546c629289b util.id: New util for producing random identifiers of varying sizes
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10 local s_gsub = string.gsub;
9546c629289b util.id: New util for producing random identifiers of varying sizes
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11 local random_bytes = require "util.random".bytes;
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12 local base64_encode = require "util.encodings".base64.encode;
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13
9546c629289b util.id: New util for producing random identifiers of varying sizes
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14 local b64url = { ["+"] = "-", ["/"] = "_", ["="] = "" };
9546c629289b util.id: New util for producing random identifiers of varying sizes
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15 local function b64url_random(len)
9546c629289b util.id: New util for producing random identifiers of varying sizes
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16 return (s_gsub(base64_encode(random_bytes(len)), "[+/=]", b64url));
9546c629289b util.id: New util for producing random identifiers of varying sizes
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17 end
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18
9546c629289b util.id: New util for producing random identifiers of varying sizes
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19 return {
9546c629289b util.id: New util for producing random identifiers of varying sizes
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20 short = function () return b64url_random(6); end;
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21 medium = function () return b64url_random(12); end;
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22 long = function () return b64url_random(24); end;
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23 custom = function (size)
9546c629289b util.id: New util for producing random identifiers of varying sizes
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24 return function () return b64url_random(size); end;
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25 end;
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26 }