Mercurial > prosody-modules

annotate mod_carbons/mod_carbons.lua @ 1252:08e50d742392

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mod_component_roundrobin: Fix handshake (Thanks Julien)
author Kim Alvefur <zash@zash.se>
date Wed, 18 Dec 2013 18:13:03 +0100
parents 0d3d15586d7e
children d3e75f6dde9b
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6d0d2673f95e mod_carbons: Add MIT license statement.
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diff changeset
1 -- XEP-0280: Message Carbons implementation for Prosody
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2 -- Copyright (C) 2011 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 st = require "util.stanza";
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7 local jid_bare = require "util.jid".bare;
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8 local xmlns_carbons = "urn:xmpp:carbons:2";
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9 local xmlns_carbons_old = "urn:xmpp:carbons:1";
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10 local xmlns_carbons_really_old = "urn:xmpp:carbons:0";
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11 local xmlns_forward = "urn:xmpp:forward:0";
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12 local full_sessions, bare_sessions = full_sessions, bare_sessions;
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13
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14 local function toggle_carbons(event)
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15 local origin, stanza = event.origin, event.stanza;
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16 local state = stanza.tags[1].attr.mode or stanza.tags[1].name;
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17 module:log("debug", "%s %sd carbons", origin.full_jid, state);
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18 origin.want_carbons = state == "enable" and stanza.tags[1].attr.xmlns;
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19 return origin.send(st.reply(stanza));
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20 end
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21 module:hook("iq-set/self/"..xmlns_carbons..":disable", toggle_carbons);
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22 module:hook("iq-set/self/"..xmlns_carbons..":enable", toggle_carbons);
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23
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24 -- COMPAT
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25 module:hook("iq-set/self/"..xmlns_carbons_old..":disable", toggle_carbons);
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26 module:hook("iq-set/self/"..xmlns_carbons_old..":enable", toggle_carbons);
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27 module:hook("iq-set/self/"..xmlns_carbons_really_old..":carbons", toggle_carbons);
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28
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29 local function message_handler(event, c2s)
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30 local origin, stanza = event.origin, event.stanza;
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31 local orig_type = stanza.attr.type;
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32 local orig_from = stanza.attr.from;
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33 local orig_to = stanza.attr.to;
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34
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35 if not (orig_type == nil
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36 or orig_type == "normal"
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37 or orig_type == "chat") then
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38 return -- No carbons for messages of type error or headline
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39 end
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40
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41 -- Stanza sent by a local client
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42 local bare_jid = jid_bare(orig_from);
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43 local target_session = origin;
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44 local top_priority = false;
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45 local user_sessions = bare_sessions[bare_jid];
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46
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47 -- Stanza about to be delivered to a local client
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48 if not c2s then
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49 bare_jid = jid_bare(orig_to);
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50 target_session = full_sessions[orig_to];
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51 user_sessions = bare_sessions[bare_jid];
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52 if not target_session and user_sessions then
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53 -- The top resources will already receive this message per normal routing rules,
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54 -- so we are going to skip them in order to avoid sending duplicated messages.
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55 local top_resources = user_sessions.top_resources;
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56 top_priority = top_resources and top_resources[1].priority
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57 end
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58 end
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59
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60 if not user_sessions then
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61 module:log("debug", "Skip carbons for offline user");
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62 return -- No use in sending carbons to an offline user
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63 end
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64
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65 if not c2s and stanza:get_child("private", xmlns_carbons) then
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66 stanza:maptags(function(tag)
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67 if not ( tag.attr.xmlns == xmlns_carbons and tag.name == "private" ) then
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68 return tag;
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69 end
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70 end);
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71 module:log("debug", "Message tagged private, ignoring");
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72 return
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73 elseif stanza:get_child("no-copy", "urn:xmpp:hints") then
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74 module:log("debug", "Message has no-copy hint, ignoring");
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75 return
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76 end
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77
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78 -- Create the carbon copy and wrap it as per the Stanza Forwarding XEP
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79 local copy = st.clone(stanza);
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80 copy.attr.xmlns = "jabber:client";
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81 local carbon = st.message{ from = bare_jid, type = orig_type, }
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d24d87ca3f5f mod_carbons: <forwarded/> should be nested in <sent/>/<received/>
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82 :tag(c2s and "sent" or "received", { xmlns = xmlns_carbons })
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83 :tag("forwarded", { xmlns = xmlns_forward })
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84 :add_child(copy):reset();
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85
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86 -- COMPAT
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87 local carbon_old = st.message{ from = bare_jid, type = orig_type, }
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88 :tag(c2s and "sent" or "received", { xmlns = xmlns_carbons_old }):up()
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89 :tag("forwarded", { xmlns = xmlns_forward })
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90 :add_child(copy):reset();
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91
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92 -- COMPAT
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93 local carbon_really_old = st.clone(stanza)
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94 :tag(c2s and "sent" or "received", { xmlns = xmlns_carbons_really_old }):up()
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95
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96 user_sessions = user_sessions and user_sessions.sessions;
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97 for _, session in pairs(user_sessions) do
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98 -- Carbons are sent to resources that have enabled it
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99 if session.want_carbons
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100 -- but not the resource that sent the message, or the one that it's directed to
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101 and session ~= target_session
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102 -- and isn't among the top resources that would receive the message per standard routing rules
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103 and (c2s or session.priority ~= top_priority)
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104 -- don't send v0 carbons (or copies) for c2s
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105 and (not c2s or session.want_carbons ~= xmlns_carbons_really_old) then
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106 carbon.attr.to = session.full_jid;
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107 module:log("debug", "Sending carbon to %s", session.full_jid);
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108 local carbon = session.want_carbons == xmlns_carbons_old and carbon_old -- COMPAT
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109 or session.want_carbons == xmlns_carbons_really_old and carbon_really_old -- COMPAT
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110 or carbon;
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111 session.send(carbon);
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112 end
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113 end
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114 end
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115
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116 local function c2s_message_handler(event)
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117 return message_handler(event, true)
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118 end
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119
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120 -- Stanzas sent by local clients
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121 module:hook("pre-message/host", c2s_message_handler, 1);
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122 module:hook("pre-message/bare", c2s_message_handler, 1);
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123 module:hook("pre-message/full", c2s_message_handler, 1);
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124 -- Stanzas to local clients
480
0cef5be669de mod_carbons: Consolidate message handlers
Kim Alvefur <zash@zash.se>
parents: 463
diff changeset
125 module:hook("message/bare", message_handler, 1);
0cef5be669de mod_carbons: Consolidate message handlers
Kim Alvefur <zash@zash.se>
parents: 463
diff changeset
126 module:hook("message/full", message_handler, 1);
462
f28a3f260fc2 mod_carbons: Initial commit.
Kim Alvefur <zash@zash.se>
parents:
diff changeset
127
f28a3f260fc2 mod_carbons: Initial commit.
Kim Alvefur <zash@zash.se>
parents:
diff changeset
128 module:add_feature(xmlns_carbons);
854
1c64ab8ae374 mod_carbons: Advertise support for the previous version
Kim Alvefur <zash@zash.se>
parents: 850
diff changeset
129 module:add_feature(xmlns_carbons_old);
888
f8d08f8ed7de mod_carbons: Make support for v0 disabled by default, don't send v0 carbons for c2s
Michael Holzt <kju@fqdn.org>
parents: 884
diff changeset
130 if module:get_option_boolean("carbons_v0") then
f8d08f8ed7de mod_carbons: Make support for v0 disabled by default, don't send v0 carbons for c2s
Michael Holzt <kju@fqdn.org>
parents: 884
diff changeset
131 module:add_feature(xmlns_carbons_really_old);
f8d08f8ed7de mod_carbons: Make support for v0 disabled by default, don't send v0 carbons for c2s
Michael Holzt <kju@fqdn.org>
parents: 884
diff changeset
132 end