prosody
ca6a43fe0231
plugins/mod_carbons.lua

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plugins/mod_carbons.lua @ 12579:ca6a43fe0231 0.12

util.jsonschema: Fix validation to not assume presence of "type" field MattJ reported a curious issue where validation did not work as expected. Primarily that the "type" field was expected to be mandatory, and thus leaving it out would result in no checks being performed. This was likely caused by misreading during initial development. Spent some time testing against https://github.com/json-schema-org/JSON-Schema-Test-Suite.git and discovered a multitude of issues, far too many to bother splitting into separate commits. More than half of them fail. Many because of features not implemented, which have been marked NYI. For example, some require deep comparisons e.g. when objects or arrays are present in enums fields. Some because of quirks with how Lua differs from JavaScript, e.g. no distinct array or object types. Tests involving fractional floating point numbers. We're definitely not going to follow references to remote resources. Or deal with UTF-16 sillyness. One test asserted that 1.0 is an integer, where Lua 5.3+ will disagree.
author Kim Alvefur <zash@zash.se>
date Fri, 08 Jul 2022 14:38:23 +0200
parent 12308:063ce658c181
child 12977:74b9e05af71e
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1 -- XEP-0280: Message Carbons implementation for Prosody
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2 -- Copyright (C) 2011-2016 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 jid_resource = require "util.jid".resource;
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9 local xmlns_carbons = "urn:xmpp:carbons:2";
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10 local xmlns_forward = "urn:xmpp:forward:0";
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11 local full_sessions, bare_sessions = prosody.full_sessions, prosody.bare_sessions;
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12
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13 module:add_feature("urn:xmpp:carbons:rules:0");
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14
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15 local function is_bare(jid)
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16 return not jid_resource(jid);
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17 end
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18
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19 local function toggle_carbons(event)
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20 local origin, stanza = event.origin, event.stanza;
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21 local state = stanza.tags[1].name;
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22 module:log("debug", "%s %sd carbons", origin.full_jid, state);
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23 origin.want_carbons = state == "enable" and stanza.tags[1].attr.xmlns;
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24 origin.send(st.reply(stanza));
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25 return true;
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26 end
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27 module:hook("iq-set/self/"..xmlns_carbons..":disable", toggle_carbons);
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28 module:hook("iq-set/self/"..xmlns_carbons..":enable", toggle_carbons);
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29
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30 local function should_copy(stanza, c2s, user_bare) --> boolean, reason: string
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31 local st_type = stanza.attr.type or "normal";
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32 if stanza:get_child("private", xmlns_carbons) then
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33 return false, "private";
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34 end
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35
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36 if stanza:get_child("no-copy", "urn:xmpp:hints") then
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37 return false, "hint";
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38 end
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39
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40 if not c2s and stanza.attr.to ~= user_bare and stanza:get_child("x", "http://jabber.org/protocol/muc#user") then
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41 -- MUC PMs are normally sent to full JIDs
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42 return false, "muc-pm";
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43 end
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44
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45 if st_type == "chat" then
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46 return true, "type";
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47 end
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48
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49 if st_type == "normal" and stanza:get_child("body") then
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50 return true, "type";
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51 end
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52
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53 -- Normal outgoing chat messages are sent to=bare JID. This clause should
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54 -- match the error bounces from those, which would have from=bare JID and
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55 -- be incoming (not c2s).
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56 if st_type == "error" and not c2s and is_bare(stanza.attr.from) then
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57 return true, "bounce";
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58 end
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59
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60 if stanza:get_child(nil, "urn:xmpp:jingle-message:0") or stanza:get_child(nil, "urn:xmpp:jingle-message:1") then
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61 -- XXX Experimental XEP
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62 return true, "jingle call";
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63 end
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64
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65 if stanza:get_child_with_attr("stanza-id", "urn:xmpp:sid:0", "by", user_bare) then
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66 return true, "archived";
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67 end
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68
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69 return false, "default";
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70 end
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71
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72 module:hook("carbons-should-copy", function (event)
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73 local should, why = should_copy(event.stanza);
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74 event.reason = why;
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75 return should;
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76 end, -1)
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77
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78 local function message_handler(event, c2s)
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79 local origin, stanza = event.origin, event.stanza;
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80 local orig_type = stanza.attr.type or "normal";
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81 local orig_from = stanza.attr.from;
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82 local bare_from = jid_bare(orig_from);
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83 local orig_to = stanza.attr.to;
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84 local bare_to = jid_bare(orig_to);
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85
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86 -- Stanza sent by a local client
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87 local bare_jid = bare_from; -- JID of the local user
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88 local target_session = origin;
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89 local top_priority = false;
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90 local user_sessions = bare_sessions[bare_from];
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91
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92 -- Stanza about to be delivered to a local client
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93 if not c2s then
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94 bare_jid = bare_to;
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95 target_session = full_sessions[orig_to];
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96 user_sessions = bare_sessions[bare_jid];
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97 if not target_session and user_sessions then
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98 -- The top resources will already receive this message per normal routing rules,
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99 -- so we are going to skip them in order to avoid sending duplicated messages.
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100 local top_resources = user_sessions.top_resources;
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101 top_priority = top_resources and top_resources[1].priority
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102 end
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103 end
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104
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105 if not user_sessions then
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106 module:log("debug", "Skip carbons for offline user");
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107 return -- No use in sending carbons to an offline user
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108 end
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109
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110 local event_payload = { stanza = stanza; session = origin };
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111 local should = module:fire_event("carbons-should-copy", event_payload);
063ce658c181 mod_carbons: Allow plugging into decision of whether to carbon-copy
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parents: 12234
diff changeset
112 local why = event_payload.reason;
10779
d95e083931d1 mod_carbons: Refactor in new style (mod_mam/csi)
Kim Alvefur <zash@zash.se>
parents: 10778
diff changeset
113
d95e083931d1 mod_carbons: Refactor in new style (mod_mam/csi)
Kim Alvefur <zash@zash.se>
parents: 10778
diff changeset
114 if not should then
d95e083931d1 mod_carbons: Refactor in new style (mod_mam/csi)
Kim Alvefur <zash@zash.se>
parents: 10778
diff changeset
115 module:log("debug", "Not copying stanza: %s (%s)", stanza:top_tag(), why);
10786
a1b633ba9bd9 mod_carbons: Check for and strip 'private' tag before stopping
Kim Alvefur <zash@zash.se>
parents: 10785
diff changeset
116 if why == "private" and not c2s then
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3426e903c48d mod_carbons: Import XEP-0280 implementation from prosody-modules (sans compat with older versions of the protocol)
Kim Alvefur <zash@zash.se>
parents:
diff changeset
117 stanza:maptags(function(tag)
3426e903c48d mod_carbons: Import XEP-0280 implementation from prosody-modules (sans compat with older versions of the protocol)
Kim Alvefur <zash@zash.se>
parents:
diff changeset
118 if not ( tag.attr.xmlns == xmlns_carbons and tag.name == "private" ) then
3426e903c48d mod_carbons: Import XEP-0280 implementation from prosody-modules (sans compat with older versions of the protocol)
Kim Alvefur <zash@zash.se>
parents:
diff changeset
119 return tag;
3426e903c48d mod_carbons: Import XEP-0280 implementation from prosody-modules (sans compat with older versions of the protocol)
Kim Alvefur <zash@zash.se>
parents:
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120 end
3426e903c48d mod_carbons: Import XEP-0280 implementation from prosody-modules (sans compat with older versions of the protocol)
Kim Alvefur <zash@zash.se>
parents:
diff changeset
121 end);
10786
a1b633ba9bd9 mod_carbons: Check for and strip 'private' tag before stopping
Kim Alvefur <zash@zash.se>
parents: 10785
diff changeset
122 end
a1b633ba9bd9 mod_carbons: Check for and strip 'private' tag before stopping
Kim Alvefur <zash@zash.se>
parents: 10785
diff changeset
123 return;
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3426e903c48d mod_carbons: Import XEP-0280 implementation from prosody-modules (sans compat with older versions of the protocol)
Kim Alvefur <zash@zash.se>
parents:
diff changeset
124 end
3426e903c48d mod_carbons: Import XEP-0280 implementation from prosody-modules (sans compat with older versions of the protocol)
Kim Alvefur <zash@zash.se>
parents:
diff changeset
125
10469
658b759a1f7a mod_carbons: Improve performance by delaying creation of carbon payload
Kim Alvefur <zash@zash.se>
parents: 8354
diff changeset
126 local carbon;
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3426e903c48d mod_carbons: Import XEP-0280 implementation from prosody-modules (sans compat with older versions of the protocol)
Kim Alvefur <zash@zash.se>
parents:
diff changeset
127 user_sessions = user_sessions and user_sessions.sessions;
3426e903c48d mod_carbons: Import XEP-0280 implementation from prosody-modules (sans compat with older versions of the protocol)
Kim Alvefur <zash@zash.se>
parents:
diff changeset
128 for _, session in pairs(user_sessions) do
3426e903c48d mod_carbons: Import XEP-0280 implementation from prosody-modules (sans compat with older versions of the protocol)
Kim Alvefur <zash@zash.se>
parents:
diff changeset
129 -- Carbons are sent to resources that have enabled it
3426e903c48d mod_carbons: Import XEP-0280 implementation from prosody-modules (sans compat with older versions of the protocol)
Kim Alvefur <zash@zash.se>
parents:
diff changeset
130 if session.want_carbons
3426e903c48d mod_carbons: Import XEP-0280 implementation from prosody-modules (sans compat with older versions of the protocol)
Kim Alvefur <zash@zash.se>
parents:
diff changeset
131 -- but not the resource that sent the message, or the one that it's directed to
3426e903c48d mod_carbons: Import XEP-0280 implementation from prosody-modules (sans compat with older versions of the protocol)
Kim Alvefur <zash@zash.se>
parents:
diff changeset
132 and session ~= target_session
3426e903c48d mod_carbons: Import XEP-0280 implementation from prosody-modules (sans compat with older versions of the protocol)
Kim Alvefur <zash@zash.se>
parents:
diff changeset
133 -- and isn't among the top resources that would receive the message per standard routing rules
3426e903c48d mod_carbons: Import XEP-0280 implementation from prosody-modules (sans compat with older versions of the protocol)
Kim Alvefur <zash@zash.se>
parents:
diff changeset
134 and (c2s or session.priority ~= top_priority) then
10469
658b759a1f7a mod_carbons: Improve performance by delaying creation of carbon payload
Kim Alvefur <zash@zash.se>
parents: 8354
diff changeset
135 if not carbon then
658b759a1f7a mod_carbons: Improve performance by delaying creation of carbon payload
Kim Alvefur <zash@zash.se>
parents: 8354
diff changeset
136 -- Create the carbon copy and wrap it as per the Stanza Forwarding XEP
658b759a1f7a mod_carbons: Improve performance by delaying creation of carbon payload
Kim Alvefur <zash@zash.se>
parents: 8354
diff changeset
137 local copy = st.clone(stanza);
658b759a1f7a mod_carbons: Improve performance by delaying creation of carbon payload
Kim Alvefur <zash@zash.se>
parents: 8354
diff changeset
138 if c2s and not orig_to then
658b759a1f7a mod_carbons: Improve performance by delaying creation of carbon payload
Kim Alvefur <zash@zash.se>
parents: 8354
diff changeset
139 stanza.attr.to = bare_from;
658b759a1f7a mod_carbons: Improve performance by delaying creation of carbon payload
Kim Alvefur <zash@zash.se>
parents: 8354
diff changeset
140 end
658b759a1f7a mod_carbons: Improve performance by delaying creation of carbon payload
Kim Alvefur <zash@zash.se>
parents: 8354
diff changeset
141 copy.attr.xmlns = "jabber:client";
658b759a1f7a mod_carbons: Improve performance by delaying creation of carbon payload
Kim Alvefur <zash@zash.se>
parents: 8354
diff changeset
142 carbon = st.message{ from = bare_jid, type = orig_type, }
658b759a1f7a mod_carbons: Improve performance by delaying creation of carbon payload
Kim Alvefur <zash@zash.se>
parents: 8354
diff changeset
143 :tag(c2s and "sent" or "received", { xmlns = xmlns_carbons })
658b759a1f7a mod_carbons: Improve performance by delaying creation of carbon payload
Kim Alvefur <zash@zash.se>
parents: 8354
diff changeset
144 :tag("forwarded", { xmlns = xmlns_forward })
658b759a1f7a mod_carbons: Improve performance by delaying creation of carbon payload
Kim Alvefur <zash@zash.se>
parents: 8354
diff changeset
145 :add_child(copy):reset();
658b759a1f7a mod_carbons: Improve performance by delaying creation of carbon payload
Kim Alvefur <zash@zash.se>
parents: 8354
diff changeset
146
658b759a1f7a mod_carbons: Improve performance by delaying creation of carbon payload
Kim Alvefur <zash@zash.se>
parents: 8354
diff changeset
147 end
658b759a1f7a mod_carbons: Improve performance by delaying creation of carbon payload
Kim Alvefur <zash@zash.se>
parents: 8354
diff changeset
148
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3426e903c48d mod_carbons: Import XEP-0280 implementation from prosody-modules (sans compat with older versions of the protocol)
Kim Alvefur <zash@zash.se>
parents:
diff changeset
149 carbon.attr.to = session.full_jid;
3426e903c48d mod_carbons: Import XEP-0280 implementation from prosody-modules (sans compat with older versions of the protocol)
Kim Alvefur <zash@zash.se>
parents:
diff changeset
150 module:log("debug", "Sending carbon to %s", session.full_jid);
3426e903c48d mod_carbons: Import XEP-0280 implementation from prosody-modules (sans compat with older versions of the protocol)
Kim Alvefur <zash@zash.se>
parents:
diff changeset
151 session.send(carbon);
3426e903c48d mod_carbons: Import XEP-0280 implementation from prosody-modules (sans compat with older versions of the protocol)
Kim Alvefur <zash@zash.se>
parents:
diff changeset
152 end
3426e903c48d mod_carbons: Import XEP-0280 implementation from prosody-modules (sans compat with older versions of the protocol)
Kim Alvefur <zash@zash.se>
parents:
diff changeset
153 end
3426e903c48d mod_carbons: Import XEP-0280 implementation from prosody-modules (sans compat with older versions of the protocol)
Kim Alvefur <zash@zash.se>
parents:
diff changeset
154 end
3426e903c48d mod_carbons: Import XEP-0280 implementation from prosody-modules (sans compat with older versions of the protocol)
Kim Alvefur <zash@zash.se>
parents:
diff changeset
155
3426e903c48d mod_carbons: Import XEP-0280 implementation from prosody-modules (sans compat with older versions of the protocol)
Kim Alvefur <zash@zash.se>
parents:
diff changeset
156 local function c2s_message_handler(event)
3426e903c48d mod_carbons: Import XEP-0280 implementation from prosody-modules (sans compat with older versions of the protocol)
Kim Alvefur <zash@zash.se>
parents:
diff changeset
157 return message_handler(event, true)
3426e903c48d mod_carbons: Import XEP-0280 implementation from prosody-modules (sans compat with older versions of the protocol)
Kim Alvefur <zash@zash.se>
parents:
diff changeset
158 end
3426e903c48d mod_carbons: Import XEP-0280 implementation from prosody-modules (sans compat with older versions of the protocol)
Kim Alvefur <zash@zash.se>
parents:
diff changeset
159
3426e903c48d mod_carbons: Import XEP-0280 implementation from prosody-modules (sans compat with older versions of the protocol)
Kim Alvefur <zash@zash.se>
parents:
diff changeset
160 -- Stanzas sent by local clients
7718
c58075c4d375 mod_message, mod_carbons: Adjust event hook priorities to negative (core modules should do this to make overriding from other modules easier)
Kim Alvefur <zash@zash.se>
parents: 7698
diff changeset
161 module:hook("pre-message/host", c2s_message_handler, -0.5);
c58075c4d375 mod_message, mod_carbons: Adjust event hook priorities to negative (core modules should do this to make overriding from other modules easier)
Kim Alvefur <zash@zash.se>
parents: 7698
diff changeset
162 module:hook("pre-message/bare", c2s_message_handler, -0.5);
c58075c4d375 mod_message, mod_carbons: Adjust event hook priorities to negative (core modules should do this to make overriding from other modules easier)
Kim Alvefur <zash@zash.se>
parents: 7698
diff changeset
163 module:hook("pre-message/full", c2s_message_handler, -0.5);
6546
3426e903c48d mod_carbons: Import XEP-0280 implementation from prosody-modules (sans compat with older versions of the protocol)
Kim Alvefur <zash@zash.se>
parents:
diff changeset
164 -- Stanzas to local clients
7718
c58075c4d375 mod_message, mod_carbons: Adjust event hook priorities to negative (core modules should do this to make overriding from other modules easier)
Kim Alvefur <zash@zash.se>
parents: 7698
diff changeset
165 module:hook("message/bare", message_handler, -0.5);
c58075c4d375 mod_message, mod_carbons: Adjust event hook priorities to negative (core modules should do this to make overriding from other modules easier)
Kim Alvefur <zash@zash.se>
parents: 7698
diff changeset
166 module:hook("message/full", message_handler, -0.5);
6546
3426e903c48d mod_carbons: Import XEP-0280 implementation from prosody-modules (sans compat with older versions of the protocol)
Kim Alvefur <zash@zash.se>
parents:
diff changeset
167
3426e903c48d mod_carbons: Import XEP-0280 implementation from prosody-modules (sans compat with older versions of the protocol)
Kim Alvefur <zash@zash.se>
parents:
diff changeset
168 module:add_feature(xmlns_carbons);