annotate mod_throttle_presence/mod_throttle_presence.lua @ 5518:d87d0e4a8516

mod_http_oauth2: Validate the OpenID 'prompt' parameter Without support for affecting the login and consent procedure, it seems sensible to inform the client that they can't change anything with this parameter.
author Kim Alvefur <zash@zash.se>
date Mon, 05 Jun 2023 22:19:17 +0200
parents 552faee596b7
children
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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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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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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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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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45 module:log("debug", "Flushing buffer for %s", session.full_jid);
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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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49 session.presence_buffer = nil;
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parents: 162
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50 end
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52 module:hook("csi-client-inactive", throttle_session);
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53 module:hook("csi-client-active", restore_session);