Mercurial > prosody-modules
view mod_muc_occupant_id/mod_muc_occupant_id.lua @ 4537:53ee391ca689
mod_smacks: Fix traceback due to session being destroyed in send()
Sending something can cause the OS to notice that the connection is dead
and then the connection can be dead at this point. More likely if
opportunistic_writes is enabled.
author | Kim Alvefur <zash@zash.se> |
---|---|
date | Thu, 01 Apr 2021 11:35:26 +0200 |
parents | ae27f3359df8 |
children |
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-- Implementation of https://xmpp.org/extensions/inbox/occupant-id.html -- XEP-0421: Anonymous unique occupant identifiers for MUCs module:depends("muc"); local uuid = require "util.uuid"; local hmac_sha256 = require "util.hashes".hmac_sha256; local b64encode = require "util.encodings".base64.encode; local xmlns_occupant_id = "urn:xmpp:occupant-id:0"; local function generate_id(occupant, room) local bare = occupant.bare_jid; if room._data.occupant_id_salt == nil then room._data.occupant_id_salt = uuid.generate(); end -- XXX: Temporary not-so-important migration measure. Remove this next time -- somebody looks at it. This module used to store every participant's -- occupant-id all the time forever. room._data.occupant_ids = nil; return b64encode(hmac_sha256(bare, room._data.occupant_id_salt)); end local function update_occupant(event) local stanza, room, occupant, dest_occupant = event.stanza, event.room, event.occupant, event.dest_occupant; -- "muc-occupant-pre-change" provides "dest_occupant" but not "occupant". if dest_occupant ~= nil then occupant = dest_occupant; end -- strip any existing <occupant-id/> tags to avoid forgery stanza:remove_children("occupant-id", xmlns_occupant_id); local unique_id = generate_id(occupant, room); stanza:tag("occupant-id", { xmlns = xmlns_occupant_id, id = unique_id }):up(); end local function muc_private(event) local stanza, room = event.stanza, event.room; local occupant = room._occupants[stanza.attr.from]; update_occupant({ stanza = stanza, room = room, occupant = occupant, }); end module:add_feature(xmlns_occupant_id); module:hook("muc-disco#info", function (event) event.reply:tag("feature", { var = xmlns_occupant_id }):up(); end); module:hook("muc-broadcast-presence", update_occupant); module:hook("muc-occupant-pre-join", update_occupant); module:hook("muc-occupant-pre-change", update_occupant); module:hook("muc-occupant-groupchat", update_occupant); module:hook("muc-private-message", muc_private);