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annotate mod_muc_access_control/mod_muc_access_control.lua @ 4876:0f5f2d4475b9

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mod_http_xep227: Add support for import via APIs rather than direct store manipulation In particular this transitions PEP nodes and data to be imported via mod_pep's APIs, fixing issues with importing at runtime while PEP data may already be live in RAM. Next obvious candidate for this approach is rosters, so clients get immediate roster pushes and other special handling (such as emitting subscribes to reach the desired subscription state).
author Matthew Wild <mwild1@gmail.com>
date Tue, 18 Jan 2022 17:01:18 +0000
parents f54c80404ad3
children
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1 local st = require "util.stanza";
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2 local jid = require "util.jid";
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3 local nodeprep = require "util.encodings".stringprep.nodeprep;
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4
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5 local unprepped_access_lists = module:get_option("muc_access_lists", {});
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6 local access_lists = {};
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7
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8 -- Make sure all input is prepped
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9 for unprepped_room_name, unprepped_list in pairs(unprepped_access_lists) do
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10 local prepped_room_name = nodeprep(unprepped_room_name);
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11 if not prepped_room_name then
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12 module:log("error", "Invalid room name: %s", unprepped_room_name);
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13 else
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14 local prepped_list = {};
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15 for _, unprepped_jid in ipairs(unprepped_list) do
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16 local prepped_jid = jid.prep(unprepped_jid);
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17 if not prepped_jid then
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18 module:log("error", "Invalid JID: %s", unprepped_jid);
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19 else
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20 prepped_list[prepped_jid] = true;
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21 end
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22 end
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23 access_lists[prepped_room_name] = prepped_list;
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24 end
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25 end
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26
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27 local function is_restricted(room, who)
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28 local allowed = access_lists[room];
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29
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30 if allowed == nil or allowed[who] or allowed[select(2, jid.split(who))] then
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31 return nil;
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32 end
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33
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34 return "forbidden";
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35 end
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36
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37 module:hook("presence/full", function(event)
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38 local stanza = event.stanza;
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39
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40 if stanza.name == "presence" and stanza.attr.type == "unavailable" then -- Leaving events get discarded
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41 return;
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42 end
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43
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44 -- Get the room
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45 local room = jid.split(stanza.attr.to);
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46 if not room then return; end
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47
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48 -- Get who has tried to join it
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49 local who = jid.bare(stanza.attr.from)
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50
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51 -- Checking whether room is restricted
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52 local check_restricted = is_restricted(room, who)
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53 if check_restricted ~= nil then
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54 event.allowed = false;
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55 event.stanza.attr.type = 'error';
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56 return event.origin.send(st.error_reply(event.stanza, "cancel", "forbidden", "You're not allowed to enter this room: " .. check_restricted));
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57 end
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58 end, 10);