prosody
e273ef869794
util/caps.lua

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util/caps.lua @ 11763:e273ef869794

net.server: Pikc server_epoll as unconditional default Previously it would have gone for server_select if util.poll was for some reason not available, which should be never these days. And even if it was, best to flush it out by throwing loud errors so users notice. Then they can work around it by using select until we delete that one.
author Kim Alvefur <zash@zash.se>
date Fri, 03 Sep 2021 17:39:00 +0200
parent 8555:4f0f5b49bb03
child 12975:d10957394a3c
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1 -- Prosody IM
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2 -- Copyright (C) 2008-2010 Matthew Wild
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3 -- Copyright (C) 2008-2010 Waqas Hussain
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4 --
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5 -- This project is MIT/X11 licensed. Please see the
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6 -- COPYING file in the source package for more information.
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7 --
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8
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9 local base64 = require "util.encodings".base64.encode;
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10 local sha1 = require "util.hashes".sha1;
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12 local t_insert, t_sort, t_concat = table.insert, table.sort, table.concat;
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13 local ipairs = ipairs;
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14
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15 local _ENV = nil;
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16 -- luacheck: std none
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17
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18 local function calculate_hash(disco_info)
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19 local identities, features, extensions = {}, {}, {};
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20 for _, tag in ipairs(disco_info) do
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21 if tag.name == "identity" then
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22 t_insert(identities, (tag.attr.category or "").."\0"..(tag.attr.type or "").."\0"..(tag.attr["xml:lang"] or "").."\0"..(tag.attr.name or ""));
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23 elseif tag.name == "feature" then
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24 t_insert(features, tag.attr.var or "");
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25 elseif tag.name == "x" and tag.attr.xmlns == "jabber:x:data" then
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26 local form = {};
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27 local FORM_TYPE;
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28 for _, field in ipairs(tag.tags) do
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29 if field.name == "field" and field.attr.var then
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30 local values = {};
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31 for _, val in ipairs(field.tags) do
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32 val = #val.tags == 0 and val:get_text();
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33 if val then t_insert(values, val); end
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34 end
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35 t_sort(values);
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36 if field.attr.var == "FORM_TYPE" then
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37 FORM_TYPE = values[1];
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38 elseif #values > 0 then
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39 t_insert(form, field.attr.var.."\0"..t_concat(values, "<"));
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40 else
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41 t_insert(form, field.attr.var);
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42 end
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43 end
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44 end
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45 t_sort(form);
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46 form = t_concat(form, "<");
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47 if FORM_TYPE then form = FORM_TYPE.."\0"..form; end
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48 t_insert(extensions, form);
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49 end
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50 end
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51 t_sort(identities);
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52 t_sort(features);
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53 t_sort(extensions);
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54 if #identities > 0 then identities = t_concat(identities, "<"):gsub("%z", "/").."<"; else identities = ""; end
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55 if #features > 0 then features = t_concat(features, "<").."<"; else features = ""; end
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56 if #extensions > 0 then extensions = t_concat(extensions, "<"):gsub("%z", "<").."<"; else extensions = ""; end
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57 local S = identities..features..extensions;
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58 local ver = base64(sha1(S));
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59 return ver, S;
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60 end
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61
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62 return {
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63 calculate_hash = calculate_hash;
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64 };