prosody-modules
28d4b58bcc3b
mod_carbons/mod_carbons.lua

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mod_carbons/mod_carbons.lua @ 1151:28d4b58bcc3b

mod_carbons: Add support for XEP-0334: Message Processing Hints
author Kim Alvefur <zash@zash.se>
date Sun, 11 Aug 2013 23:37:26 +0200
parent 900:aca1c5eb0508
child 1167:8ceab2331216
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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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 if stanza.attr.type == "set" then
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17 local state = stanza.tags[1].name;
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18 module:log("debug", "%s %sd carbons", origin.full_jid, state);
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19 origin.want_carbons = state == "enable" and stanza.tags[1].attr.xmlns;
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20 origin.send(st.reply(stanza));
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21 return true
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22 end
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23 end
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24 module:hook("iq/self/"..xmlns_carbons..":disable", toggle_carbons);
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25 module:hook("iq/self/"..xmlns_carbons..":enable", toggle_carbons);
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26
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27 -- COMPAT
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28 module:hook("iq/self/"..xmlns_carbons_old..":disable", toggle_carbons);
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29 module:hook("iq/self/"..xmlns_carbons_old..":enable", toggle_carbons);
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30
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31 -- COMPAT :(
888
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32 if module:get_option_boolean("carbons_v0") then
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33 module:hook("iq/self/"..xmlns_carbons_really_old..":carbons", function(event)
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34 local origin, stanza = event.origin, event.stanza;
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35 if stanza.attr.type == "set" then
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36 local state = stanza.tags[1].attr.mode;
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37 origin.want_carbons = state == "enable" and xmlns_carbons_really_old;
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38 origin.send(st.reply(stanza));
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39 return true;
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40 end
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41 end);
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42 end
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43
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44 local function message_handler(event, c2s)
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45 local origin, stanza = event.origin, event.stanza;
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46 local orig_type = stanza.attr.type;
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47 local orig_from = stanza.attr.from;
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48 local orig_to = stanza.attr.to;
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49
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50 if not (orig_type == nil
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51 or orig_type == "normal"
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52 or orig_type == "chat") then
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53 return -- No carbons for messages of type error or headline
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54 end
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55
833
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56 -- Stanza sent by a local client
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57 local bare_jid = jid_bare(orig_from);
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58 local target_session = origin;
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59 local top_priority = false;
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60 local user_sessions = bare_sessions[bare_jid];
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61
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62 -- Stanza about to be delivered to a local client
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63 if not c2s then
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64 bare_jid = jid_bare(orig_to);
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65 target_session = full_sessions[orig_to];
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66 user_sessions = bare_sessions[bare_jid];
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67 if not target_session and user_sessions then
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68 -- The top resources will already receive this message per normal routing rules,
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69 -- so we are going to skip them in order to avoid sending duplicated messages.
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70 local top_resources = user_sessions.top_resources;
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71 top_priority = top_resources and top_resources[1].priority
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72 end
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73 end
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74
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75 if not user_sessions then
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76 module:log("debug", "Skip carbons for offline user");
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77 return -- No use in sending carbons to an offline user
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78 end
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79
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80 if not c2s and stanza:get_child("private", xmlns_carbons) then
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81 stanza:maptags(function(tag)
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82 return tag.attr.xmlns == xmlns_carbons
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83 and tag.name == "private" and tag or nil;
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84 end);
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85 module:log("debug", "Message tagged private, ignoring");
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86 return
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87 elseif stanza:get_child("no-copy", "urn:xmpp:hints") then
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88 module:log("debug", "Message has no-copy hint, ignoring");
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89 return
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90 end
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91
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92 -- Create the carbon copy and wrap it as per the Stanza Forwarding XEP
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93 local copy = st.clone(stanza);
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94 copy.attr.xmlns = "jabber:client";
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95 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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96 :tag(c2s and "sent" or "received", { xmlns = xmlns_carbons })
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97 :tag("forwarded", { xmlns = xmlns_forward })
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98 :add_child(copy):reset();
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99
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100 -- COMPAT
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101 local carbon_old = st.message{ from = bare_jid, type = orig_type, }
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102 :tag(c2s and "sent" or "received", { xmlns = xmlns_carbons_old }):up()
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103 :tag("forwarded", { xmlns = xmlns_forward })
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104 :add_child(copy):reset();
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105
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106 -- COMPAT
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107 local carbon_really_old = st.clone(stanza)
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108 :tag(c2s and "sent" or "received", { xmlns = xmlns_carbons_really_old }):up()
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109
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110 user_sessions = user_sessions and user_sessions.sessions;
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111 for _, session in pairs(user_sessions) do
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112 -- Carbons are sent to resources that have enabled it
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113 if session.want_carbons
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114 -- but not the resource that sent the message, or the one that it's directed to
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115 and session ~= target_session
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116 -- and isn't among the top resources that would receive the message per standard routing rules
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117 and (c2s or session.priority ~= top_priority)
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118 -- don't send v0 carbons (or copies) for c2s
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119 and (not c2s or session.want_carbons ~= xmlns_carbons_really_old) then
833
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120 carbon.attr.to = session.full_jid;
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121 module:log("debug", "Sending carbon to %s", session.full_jid);
884
2ece37bf9cc6 mod_carbons: Support the pre-forwarding version of Carbons. Please don't implement this.
Kim Alvefur <zash@zash.se>
parents: 854
diff changeset
122 local carbon = session.want_carbons == xmlns_carbons_old and carbon_old -- COMPAT
2ece37bf9cc6 mod_carbons: Support the pre-forwarding version of Carbons. Please don't implement this.
Kim Alvefur <zash@zash.se>
parents: 854
diff changeset
123 or session.want_carbons == xmlns_carbons_really_old and carbon_really_old -- COMPAT
2ece37bf9cc6 mod_carbons: Support the pre-forwarding version of Carbons. Please don't implement this.
Kim Alvefur <zash@zash.se>
parents: 854
diff changeset
124 or carbon;
832
9087431d35f6 mod_carbons: Add comments and rename some variables to make it clearer
Kim Alvefur <zash@zash.se>
parents: 804
diff changeset
125 session.send(carbon);
462
f28a3f260fc2 mod_carbons: Initial commit.
Kim Alvefur <zash@zash.se>
parents:
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126 end
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parents:
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127 end
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parents:
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128 end
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parents:
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129
480
0cef5be669de mod_carbons: Consolidate message handlers
Kim Alvefur <zash@zash.se>
parents: 463
diff changeset
130 local function c2s_message_handler(event)
0cef5be669de mod_carbons: Consolidate message handlers
Kim Alvefur <zash@zash.se>
parents: 463
diff changeset
131 return message_handler(event, true)
462
f28a3f260fc2 mod_carbons: Initial commit.
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parents:
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132 end
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parents:
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133
f28a3f260fc2 mod_carbons: Initial commit.
Kim Alvefur <zash@zash.se>
parents:
diff changeset
134 -- Stanzas sent by local clients
900
aca1c5eb0508 mod_carbons: Catch outgoing messages to hosts (thanks waqas)
Kim Alvefur <zash@zash.se>
parents: 896
diff changeset
135 module:hook("pre-message/host", c2s_message_handler, 1);
462
f28a3f260fc2 mod_carbons: Initial commit.
Kim Alvefur <zash@zash.se>
parents:
diff changeset
136 module:hook("pre-message/bare", c2s_message_handler, 1);
f28a3f260fc2 mod_carbons: Initial commit.
Kim Alvefur <zash@zash.se>
parents:
diff changeset
137 module:hook("pre-message/full", c2s_message_handler, 1);
510
59e80326f2b3 mod_carbons: Fix a typo and unindent a line.
Kim Alvefur <zash@zash.se>
parents: 480
diff changeset
138 -- Stanzas to local clients
480
0cef5be669de mod_carbons: Consolidate message handlers
Kim Alvefur <zash@zash.se>
parents: 463
diff changeset
139 module:hook("message/bare", message_handler, 1);
0cef5be669de mod_carbons: Consolidate message handlers
Kim Alvefur <zash@zash.se>
parents: 463
diff changeset
140 module:hook("message/full", message_handler, 1);
462
f28a3f260fc2 mod_carbons: Initial commit.
Kim Alvefur <zash@zash.se>
parents:
diff changeset
141
f28a3f260fc2 mod_carbons: Initial commit.
Kim Alvefur <zash@zash.se>
parents:
diff changeset
142 module:add_feature(xmlns_carbons);
854
1c64ab8ae374 mod_carbons: Advertise support for the previous version
Kim Alvefur <zash@zash.se>
parents: 850
diff changeset
143 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
144 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
145 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
146 end