prosody-modules
6fa8436f8ee3
mod_carbons/mod_carbons.lua

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mod_carbons/mod_carbons.lua @ 520:6fa8436f8ee3

mod_carbons: Remove completed TODO
author Kim Alvefur <zash@zash.se>
date Fri, 06 Jan 2012 12:09:48 +0100
parent 510:59e80326f2b3
child 521:6d0d2673f95e
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f28a3f260fc2 mod_carbons: Initial commit.
Kim Alvefur <zash@zash.se>
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1 local st = require "util.stanza";
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2 local jid_bare = require "util.jid".bare;
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3 local jid_split = require "util.jid".split;
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4 local xmlns_carbons = "urn:xmpp:carbons:1";
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5 local xmlns_forward = "urn:xmpp:forward:0";
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6 local host_sessions = hosts[module.host].sessions;
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7
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8 module:hook("iq/self/"..xmlns_carbons..":enable", function(event)
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9 local origin, stanza = event.origin, event.stanza;
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10 if stanza.attr.type == "set" then
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11 module:log("debug", "%s enabled carbons", origin.full_jid);
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12 origin.want_carbons = true;
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13 origin.send(st.reply(stanza));
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14 return true
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15 end
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16 end);
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17
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18 module:hook("iq/self/"..xmlns_carbons..":disable", function(event)
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19 local origin, stanza = event.origin, event.stanza;
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20 if stanza.attr.type == "set" then
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21 module:log("debug", "%s disabled carbons", origin.full_jid);
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22 origin.want_carbons = nil;
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23 origin.send(st.reply(stanza));
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24 return true
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25 end
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26 end);
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27
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28 local function message_handler(event, c2s)
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29 local origin, stanza = event.origin, event.stanza;
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30 local orig_type = stanza.attr.type;
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31 local orig_to = stanza.attr.to;
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32 local orig_from = stanza.attr.from;
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33
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34 if not (orig_type == nil
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35 or orig_type == "normal"
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36 or orig_type == "chat") then
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37 return -- No carbons for messages of type error or headline
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38 end
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39
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40 local bare_jid, user_sessions;
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41 local no_carbon_to = {};
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42 module:log("debug", "origin (%s) type: %s", tostring(origin), origin.type)
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43 if c2s then -- Stanza sent by a local client
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44 bare_jid = (origin.username.."@"..origin.host)
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45 user_sessions = host_sessions[origin.username];
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46 else -- Stanza about to be delivered to a local client
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47 local username, hostname, resource = jid_split(orig_to);
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48 bare_jid = jid_bare(orig_to);
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49 user_sessions = host_sessions[username];
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50 if resource then
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51 no_carbon_to[resource] = true;
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52 else
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53 local top_resources = user_sessions.top_resources;
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54 for _, session in ipairs(top_resources) do
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55 no_carbon_to[session.resource] = true;
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56 end
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57 end
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58 end
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59
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60 if not c2s and stanza:get_child("private", xmlns_carbons) then
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61 stanza:maptags(function(tag)
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62 return tag.attr.xmlns == xmlns_carbons
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63 and tag.name == "private" and tag or nil;
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64 end);
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65 return
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66 end
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67
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68 if not stanza:get_child("forwarded", xmlns_forward) then
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69 user_sessions = user_sessions and user_sessions.sessions;
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70 for resource, session in pairs(user_sessions) do
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71 local full_jid = bare_jid .. "/" .. resource;
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72 if session.want_carbons then
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73 if (c2s and session ~= origin) or (not c2s and not no_carbon_to[resource]) then
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74 local msg = st.clone(stanza);
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75 msg.attr.xmlns = msg.attr.xmlns or "jabber:client";
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76 local fwd = st.message{
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77 from = bare_jid,
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78 to = full_jid,
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79 type = orig_type,
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80 }
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81 :tag("forwarded", { xmlns = xmlns_forward })
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82 :tag(c2s and "sent" or "received", { xmlns = xmlns_carbons }):up()
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83 :add_child(msg);
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84 core_post_stanza(origin, fwd);
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85 end
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86 end
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87 end
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88 end
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89 end
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90
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91 local function c2s_message_handler(event)
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92 return message_handler(event, true)
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93 end
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94
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95 -- Stanzas sent by local clients
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96 module:hook("pre-message/bare", c2s_message_handler, 1);
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97 module:hook("pre-message/full", c2s_message_handler, 1);
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98 -- Stanzas to local clients
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99 module:hook("message/bare", message_handler, 1);
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100 module:hook("message/full", message_handler, 1);
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101
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102 module:add_feature(xmlns_carbons);