prosody
10d13e0554f9
plugins/muc/occupant_id.lib.lua

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plugins/muc/occupant_id.lib.lua @ 11515:10d13e0554f9

core.statsmanager: Allow special "manual" value for statistics_interval When set, no periodic statistics collection is done by core.statsmanager, instead some module is expected to call collect() when it suits. Obviously only one such module should be enabled. Quoth jonas’ > correct way is to scrape the internal sources on each call to /metrics > in the context of Prometheus "manual" as opposed to "automatic", from the point of view of statsmanager.
author Kim Alvefur <zash@zash.se>
date Tue, 06 Apr 2021 23:25:15 +0200
parent 11215:9ce0a899ff07
child 12108:e9882c4c397f
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rev   line source
11215
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1 -- Implementation of https://xmpp.org/extensions/inbox/occupant-id.html
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2 -- XEP-0421: Anonymous unique occupant identifiers for MUCs
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3
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4 -- (C) 2020 Maxime “pep” Buquet <pep@bouah.net>
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5 -- (C) 2020 Matthew Wild <mwild1@gmail.com>
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6
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7 local uuid = require "util.uuid";
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8 local hmac_sha256 = require "util.hashes".hmac_sha256;
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9 local b64encode = require "util.encodings".base64.encode;
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10
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11 local xmlns_occupant_id = "urn:xmpp:occupant-id:0";
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12
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13 local function get_occupant_id(room, occupant)
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14 if occupant.stable_id then
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15 return occupant.stable_id;
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16 end
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17
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18 local salt = room._data.occupant_id_salt;
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19 if not salt then
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20 salt = uuid.generate();
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21 room._data.occupant_id_salt = salt;
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22 end
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23
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24 occupant.stable_id = b64encode(hmac_sha256(occupant.bare_jid, salt));
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25
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26 return occupant.stable_id;
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27 end
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28
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29 local function update_occupant(event)
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30 local stanza, room, occupant, dest_occupant = event.stanza, event.room, event.occupant, event.dest_occupant;
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31
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32 -- "muc-occupant-pre-change" provides "dest_occupant" but not "occupant".
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33 if dest_occupant ~= nil then
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34 occupant = dest_occupant;
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35 end
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36
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37 -- strip any existing <occupant-id/> tags to avoid forgery
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38 stanza:remove_children("occupant-id", xmlns_occupant_id);
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39
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40 local unique_id = get_occupant_id(room, occupant);
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41 stanza:tag("occupant-id", { xmlns = xmlns_occupant_id, id = unique_id }):up();
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42 end
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43
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44 local function muc_private(event)
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45 local stanza, room = event.stanza, event.room;
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46 local occupant = room._occupants[stanza.attr.from];
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47
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48 update_occupant({
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49 stanza = stanza,
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50 room = room,
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51 occupant = occupant,
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52 });
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53 end
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54
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55 if module:get_option_boolean("muc_occupant_id", true) then
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56 module:add_feature(xmlns_occupant_id);
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57 module:hook("muc-disco#info", function (event)
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58 event.reply:tag("feature", { var = xmlns_occupant_id }):up();
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59 end);
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60
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61 module:hook("muc-broadcast-presence", update_occupant);
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62 module:hook("muc-occupant-pre-join", update_occupant);
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63 module:hook("muc-occupant-pre-change", update_occupant);
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64 module:hook("muc-occupant-groupchat", update_occupant);
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65 module:hook("muc-private-message", muc_private);
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66 end
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67
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68 return {
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69 get_occupant_id = get_occupant_id;
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70 };