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annotate mod_throttle_presence/mod_throttle_presence.lua @ 5160:8474a3b80200

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mod_firewall: Fix 'is_admin' internal dependency rule #1797 (thanks diane) Looks like the boolean logic was inverted here. Instead, for now, simply check if is_admin is there. It is deprecated in trunk and was briefly removed before being brought back with a 'deprecated' warning as part of the new roles and permissions work. Making this dependency conditioned on the existence of the underlying function should make it work until it actually goes away for real.
author Kim Alvefur <zash@zash.se>
date Fri, 27 Jan 2023 23:06:25 +0100
parents 552faee596b7
children
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parents: 162
diff changeset
1 local filters = require "util.filters";
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2 local st = require "util.stanza";
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3
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4 module:depends("csi");
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6 local function presence_filter(stanza, session)
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7 if getmetatable(stanza) ~= st.stanza_mt then
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8 return stanza; -- Things we don't want to touch
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9 end
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10 if stanza._flush then
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11 stanza._flush = nil;
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12 return stanza;
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13 end
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parents: 162
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14 local buffer = session.presence_buffer;
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15 local from = stanza.attr.from;
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16 if stanza.name == "presence" and (stanza.attr.type == nil or stanza.attr.type == "unavailable") then
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17 module:log("debug", "Buffering presence stanza from %s to %s", stanza.attr.from, session.full_jid);
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18 buffer[stanza.attr.from] = st.clone(stanza);
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19 return nil; -- Drop this stanza (we've stored it for later)
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20 else
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21 local cached_presence = buffer[stanza.attr.from];
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22 if cached_presence then
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23 module:log("debug", "Important stanza for %s from %s, flushing presence", session.full_jid, from);
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24 stanza._flush = true;
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25 cached_presence._flush = true;
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26 session.send(cached_presence);
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parents: 162
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27 buffer[stanza.attr.from] = nil;
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28 end
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29 end
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30 return stanza;
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31 end
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33 local function throttle_session(event)
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34 local session = event.origin;
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parents: 162
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35 if session.presence_buffer then return; end
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parents: 162
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36 module:log("debug", "Suppressing presence updates to %s", session.full_jid);
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parents: 162
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37 session.presence_buffer = {};
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parents: 162
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38 filters.add_filter(session, "stanzas/out", presence_filter);
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parents: 162
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39 end
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parents: 162
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41 local function restore_session(event)
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42 local session = event.origin;
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parents: 162
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43 if not session.presence_buffer then return; end
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parents: 162
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44 filters.remove_filter(session, "stanzas/out", presence_filter);
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parents: 162
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45 module:log("debug", "Flushing buffer for %s", session.full_jid);
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parents: 162
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46 for jid, presence in pairs(session.presence_buffer) do
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parents: 162
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47 session.send(presence);
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parents: 162
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48 end
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parents: 162
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49 session.presence_buffer = nil;
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parents: 162
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50 end
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parents: 162
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52 module:hook("csi-client-inactive", throttle_session);
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53 module:hook("csi-client-active", restore_session);