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annotate mod_mamsub/mod_mamsub.lua @ 4730:1da4b815d2fe

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mod_cloud_notify: Identify (and immediately push) urgent stanzas, e.g. calls This covers the following things: - A session that appears online, but has a broken TCP connection - Clients such as Siskin and Snikket iOS that require a push for calls to work It allows the stanza to be pushed immediately instead of waiting for the session to hibernate or an ack to timeout. It shouldn't break any existing cases.
author Matthew Wild <mwild1@gmail.com>
date Wed, 27 Oct 2021 19:12:03 +0100
parents 0697fbef9134
children
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985e05ac833b mod_mamsub: Experimental implementation of MAM subscriptions
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1 -- MAM Subscriptions prototype
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2 -- Copyright (C) 2015 Kim Alvefur
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3 --
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4 -- This file is MIT/X11 licensed.
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5
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6 local mt = require"util.multitable";
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7 local st = require"util.stanza";
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8
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9 local xmlns_mamsub = "http://prosody.im/protocol/mamsub";
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10
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11 module:add_feature(xmlns_mamsub);
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12
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13 local host_sessions = prosody.hosts[module.host].sessions;
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14
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15 local weak = { __mode = "k" };
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16
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17 module:hook("iq-set/self/"..xmlns_mamsub..":subscribe", function (event)
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18 local origin, stanza = event.origin, event.stanza;
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19 if origin.mamsub ~= nil then
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20 origin.send(st.error_reply(stanza, "modify", "conflict"));
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21 return true;
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22 end
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23 origin.mamsub = xmlns_mamsub;
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24 local mamsub_sessions = host_sessions[origin.username].mamsub_sessions;
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25 if not mamsub_sessions then
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26 mamsub_sessions = setmetatable({}, weak);
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27 host_sessions[origin.username].mamsub_sessions = mamsub_sessions;
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28 end
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29 mamsub_sessions[origin] = true;
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30 origin.send(st.reply(stanza));
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31 return true;
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32 end);
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33
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34 module:hook("iq-set/self/"..xmlns_mamsub..":unsubscribe", function (event)
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35 local origin, stanza = event.origin, event.stanza;
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36 if origin.mamsub ~= xmlns_mamsub then
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37 origin.send(st.error_reply(stanza, "modify", "conflict"));
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38 return true;
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39 end
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40 origin.mamsub = nil;
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41 local mamsub_sessions = host_sessions[origin.username].mamsub_sessions;
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42 if mamsub_sessions then
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43 mamsub_sessions[origin] = nil;
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44 end
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45 origin.send(st.reply(stanza));
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46 return true;
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47 end);
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48
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49 module:hook("archive-message-added", function (event)
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50 local user_session = host_sessions[event.for_user];
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51 local mamsub_sessions = user_session and user_session.mamsub_sessions;
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52 if not mamsub_sessions then return end;
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53
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54 local for_broadcast = st.message():tag("mamsub", { xmlns = xmlns_mamsub })
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55 :tag("forwarded", { xmlns = "urn:xmpp:forward:0" })
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56 :add_child(event.stanza);
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57
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58 for session in pairs(mamsub_sessions) do
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59 if session.mamsub == xmlns_mamsub then
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60 for_broadcast.attr.to = session.full_jid;
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61 session.send(for_broadcast);
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62 end
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63 end
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64 end);