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annotate mod_carbons/mod_carbons.lua @ 494:376c4a90249c

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mod_host_guard: minor fix.
author Marco Cirillo <maranda@lightwitch.org>
date Sun, 04 Dec 2011 15:57:01 +0000
parents 0cef5be669de
children 59e80326f2b3
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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 -- TODO merge message handlers into one somehow
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9
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10 module:hook("iq/self/"..xmlns_carbons..":enable", function(event)
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11 local origin, stanza = event.origin, event.stanza;
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12 if stanza.attr.type == "set" then
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13 module:log("debug", "%s enabled carbons", origin.full_jid);
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14 origin.want_carbons = true;
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15 origin.send(st.reply(stanza));
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16 return true
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17 end
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18 end);
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19
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20 module:hook("iq/self/"..xmlns_carbons..":disable", function(event)
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21 local origin, stanza = event.origin, event.stanza;
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22 if stanza.attr.type == "set" then
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23 module:log("debug", "%s disabled carbons", origin.full_jid);
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24 origin.want_carbons = nil;
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25 origin.send(st.reply(stanza));
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26 return true
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27 end
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28 end);
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29
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30 local function message_handler(event, c2s)
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31 local origin, stanza = event.origin, event.stanza;
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32 local orig_type = stanza.attr.type;
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33 local orig_to = stanza.attr.to;
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34 local orig_from = stanza.attr.from;
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35
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36 if not (orig_type == nil
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37 or orig_type == "normal"
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38 or orig_type == "chat") then
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39 return -- No carbons for messages of type error or headline
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40 end
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41
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42 local bare_jid, user_sessions;
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43 local no_carbon_to = {};
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44 module:log("debug", "origin (%s) type: %s", tostring(origin), origin.type)
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45 if c2s then -- Stanza sent by a local client
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46 bare_jid = (origin.username.."@"..origin.host)
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47 user_sessions = host_sessions[origin.username];
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48 else -- Stanza about to be delivered to a local client
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49 local username, hostname, resource = jid_split(orig_to);
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50 bare_jid = jid_bare(orig_to);
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51 user_sessions = host_sessions[username];
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52 if resource then
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53 no_carbon_to[resource] = true;
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54 else
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55 local top_resources = user_sessions.top_resources;
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56 for _, session in ipairs(top_resources) do
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57 no_carbon_to[session.resource] = true;
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58 end
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59 end
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60 end
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61
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62 if not c2s and stanza:get_child("private", xmlns_carbons) then
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63 stanza:maptags(function(tag)
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64 return tag.attr.xmlns == xmlns_carbons
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65 and tag.name == "private" and tag or nil;
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66 end);
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67 return
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68 end
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69
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70 if not stanza:get_child("forwarded", xmlns_forward) then
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71 user_sessions = user_sessions and user_sessions.sessions;
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72 for resource, session in pairs(user_sessions) do
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73 local full_jid = bare_jid .. "/" .. resource;
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74 if session.want_carbons then
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75 if (c2s and session ~= origin) or (not c2s and not no_carbon_to[resource]) then
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76 local msg = st.clone(stanza);
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77 msg.attr.xmlns = msg.attr.xmlns or "jabber:client";
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78 local fwd = st.message{
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79 from = bare_jid,
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80 to = full_jid,
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81 type = orig_type,
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82 }
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83 :tag("forwarded", { xmlns = xmlns_forward })
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84 :tag(c2s and "sent" or "received", { xmlns = xmlns_carbons }):up()
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85 :add_child(msg);
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86 core_post_stanza(origin, fwd);
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87 end
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88 end
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89 end
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90 end
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91 end
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92
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93 local function c2s_message_handler(event)
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94 return message_handler(event, true)
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95 end
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96
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97 -- Stanzas sent by local clients
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98 module:hook("pre-message/bare", c2s_message_handler, 1);
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99 module:hook("pre-message/full", c2s_message_handler, 1);
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100 -- Stanszas to local clients
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101 module:hook("message/bare", message_handler, 1);
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102 module:hook("message/full", message_handler, 1);
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103
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104 module:add_feature(xmlns_carbons);