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annotate mod_mamsub/mod_mamsub.lua @ 5383:df11a2cbc7b7

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mod_http_oauth2: Implement RFC 7628 Proof Key for Code Exchange Likely to become mandatory in OAuth 2.1. Backwards compatible since the default 'plain' verifier would compare nil with nil if the relevant parameters are left out.
author Kim Alvefur <zash@zash.se>
date Sat, 29 Apr 2023 13:09:46 +0200
parents 0697fbef9134
children
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1747
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);