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annotate mod_throttle_presence/mod_throttle_presence.lua @ 5448:9d542e86e19a

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mod_http_oauth2: Allow requesting a subset of scopes on token refresh This enables clients to request access tokens with fewer permissions than the grant they were given, reducing impact of token leak. Clients could e.g. request access tokens with some privileges and immediately revoke them after use, or other strategies.
author Kim Alvefur <zash@zash.se>
date Thu, 11 May 2023 21:40:09 +0200
parents 552faee596b7
children
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d8c50448d0e7 mod_throttle_presence: Remove timer support, depend on mod_csi to enable/disable. Untested, but the previous version was definitely broken anyway.
Matthew Wild <mwild1@gmail.com>
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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5
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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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d8c50448d0e7 mod_throttle_presence: Remove timer support, depend on mod_csi to enable/disable. Untested, but the previous version was definitely broken anyway.
Matthew Wild <mwild1@gmail.com>
parents: 162
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14 local buffer = session.presence_buffer;
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parents: 162
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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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parents: 1867
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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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parents: 162
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22 if cached_presence then
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parents: 162
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23 module:log("debug", "Important stanza for %s from %s, flushing presence", session.full_jid, from);
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parents: 1489
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24 stanza._flush = true;
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25 cached_presence._flush = true;
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parents: 162
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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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parents: 162
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30 return stanza;
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31 end
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parents:
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parents: 162
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33 local function throttle_session(event)
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34 local session = event.origin;
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Matthew Wild <mwild1@gmail.com>
parents: 162
diff changeset
35 if session.presence_buffer then return; end
d8c50448d0e7 mod_throttle_presence: Remove timer support, depend on mod_csi to enable/disable. Untested, but the previous version was definitely broken anyway.
Matthew Wild <mwild1@gmail.com>
parents: 162
diff changeset
36 module:log("debug", "Suppressing presence updates to %s", session.full_jid);
d8c50448d0e7 mod_throttle_presence: Remove timer support, depend on mod_csi to enable/disable. Untested, but the previous version was definitely broken anyway.
Matthew Wild <mwild1@gmail.com>
parents: 162
diff changeset
37 session.presence_buffer = {};
d8c50448d0e7 mod_throttle_presence: Remove timer support, depend on mod_csi to enable/disable. Untested, but the previous version was definitely broken anyway.
Matthew Wild <mwild1@gmail.com>
parents: 162
diff changeset
38 filters.add_filter(session, "stanzas/out", presence_filter);
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Matthew Wild <mwild1@gmail.com>
parents: 162
diff changeset
39 end
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parents:
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Matthew Wild <mwild1@gmail.com>
parents: 162
diff changeset
41 local function restore_session(event)
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42 local session = event.origin;
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parents: 162
diff changeset
43 if not session.presence_buffer then return; end
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parents: 162
diff changeset
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
diff changeset
46 for jid, presence in pairs(session.presence_buffer) do
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parents: 162
diff changeset
47 session.send(presence);
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parents: 162
diff changeset
48 end
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parents: 162
diff changeset
49 session.presence_buffer = nil;
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parents: 162
diff changeset
50 end
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parents: 162
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parents: 162
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52 module:hook("csi-client-inactive", throttle_session);
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parents: 162
diff changeset
53 module:hook("csi-client-active", restore_session);