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annotate mod_ping_muc/mod_ping_muc.lua @ 5598:b496ebc12aed

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mod_http_oauth2: Add titles and descriptions to registration schema Since it is exposed publicly, it can serve as documentation.
author Kim Alvefur <zash@zash.se>
date Fri, 14 Jul 2023 16:04:11 +0200
parents 0772facc786f
children d6a695abb33c
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a7c0c70e64b6 mod_ping_muc: Yet another attempt to improve MUC reliability
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1 local id = require "util.id";
a7c0c70e64b6 mod_ping_muc: Yet another attempt to improve MUC reliability
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2 local jid = require "util.jid";
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3 local set = require "util.set";
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4 local st = require "util.stanza";
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5
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6 if module:get_host_type() ~= "local" then
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7 module:log("error", "mod_%s must be loaded as a regular module, not on Components", module.name);
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8 return
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9 end
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10
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11 module:depends "track_muc_joins";
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12 module:add_feature("https://modules.prosody.im/mod_" .. module.name);
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13
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14 local local_sessions = prosody.hosts[module.host].sessions;
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15
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16 module:hook_global("s2s-destroyed", function(event)
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17 local s2s_session = event.session;
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18 if s2s_session.direction == "outgoing" and s2s_session.from_host ~= module.host then
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19 return
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20 elseif s2s_session.direction == "incoming" and s2s_session.to_host ~= module.host then
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21 return
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22 end
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23
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24 local related_hosts = set.new({ s2s_session.direction == "outgoing" and s2s_session.to_host or s2s_session.from_host });
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25
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26 if s2s_session.hosts then
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27 -- While rarely used, multiplexing is still supported
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28 for host, state in pairs(s2s_session.hosts) do if state.authed then related_hosts:add(host); end end
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29 end
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30
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31 for _, user_session in pairs(local_sessions) do
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32 for _, session in pairs(user_session.sessions) do
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33 if session.rooms_joined then
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34 for room, info in pairs(session.rooms_joined) do
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35 local nick = info.nick or info;
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36 local room_nick = room .. "/" .. nick;
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37 if related_hosts:contains(jid.host(room)) then
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38 -- User is in a MUC room for which the s2s connection was lost. Now what?
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39
a7c0c70e64b6 mod_ping_muc: Yet another attempt to improve MUC reliability
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40 -- Self-ping
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41 -- =========
a7c0c70e64b6 mod_ping_muc: Yet another attempt to improve MUC reliability
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42 --
a7c0c70e64b6 mod_ping_muc: Yet another attempt to improve MUC reliability
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43 -- Response of <iq type=result> means the user is still in the room
a7c0c70e64b6 mod_ping_muc: Yet another attempt to improve MUC reliability
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44 -- (and self-ping is supported), so we do nothing.
a7c0c70e64b6 mod_ping_muc: Yet another attempt to improve MUC reliability
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45 --
a7c0c70e64b6 mod_ping_muc: Yet another attempt to improve MUC reliability
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46 -- An error reply either means the user has fallen out of the room,
a7c0c70e64b6 mod_ping_muc: Yet another attempt to improve MUC reliability
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47 -- or that self-ping is unsupported. In the later case, whether the
a7c0c70e64b6 mod_ping_muc: Yet another attempt to improve MUC reliability
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48 -- user is still joined is indeterminate and we might as well
a7c0c70e64b6 mod_ping_muc: Yet another attempt to improve MUC reliability
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49 -- pretend they fell out.
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50 module:send_iq(st.iq({ type = "get"; id = id.medium(); from = session.full_jid; to = room_nick })
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51 :tag("ping", { xmlns = "urn:xmpp:ping"; }))
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52 :catch(function(err)
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53 module:send(
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54 st.presence({ type = "unavailable"; id = id.medium(); to = session.full_jid; from = room_nick })
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55 :tag("x", { xmlns = "http://jabber.org/protocol/muc#user" })
a7c0c70e64b6 mod_ping_muc: Yet another attempt to improve MUC reliability
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56 :tag("item", { affiliation = "none"; role = "none" })
a7c0c70e64b6 mod_ping_muc: Yet another attempt to improve MUC reliability
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57 :text_tag("reason", err.text or "Connection to remote server lost")
a7c0c70e64b6 mod_ping_muc: Yet another attempt to improve MUC reliability
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58 :up()
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59 :tag("status", { code = "110" }):up()
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60 :tag("status", { code = "333" }):up()
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61 :reset());
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62 end);
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63 -- TODO do this with some delay?
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64 end
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65 end
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66
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67 end
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68 end
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69 end
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70 end);