Software / code / prosody-modules
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mod_carbons/mod_carbons.lua @ 763:bcf0c9fff512
mod_pubsub_feeds: Depend on pubsub instead of aborting if it's not loaded
| author | Kim Alvefur <zash@zash.se> |
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| date | Wed, 01 Aug 2012 16:08:54 +0200 |
| parent | 743:5f7dd5336dbe |
| child | 804:9927d88a1b2a |
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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 |
| 462 | 6 local st = require "util.stanza"; |
| 7 local jid_bare = require "util.jid".bare; | |
| 8 local jid_split = require "util.jid".split; | |
| 9 local xmlns_carbons = "urn:xmpp:carbons:1"; | |
| 10 local xmlns_forward = "urn:xmpp:forward:0"; | |
| 11 local host_sessions = hosts[module.host].sessions; | |
| 12 | |
| 13 module:hook("iq/self/"..xmlns_carbons..":enable", function(event) | |
| 14 local origin, stanza = event.origin, event.stanza; | |
| 15 if stanza.attr.type == "set" then | |
| 16 module:log("debug", "%s enabled carbons", origin.full_jid); | |
| 17 origin.want_carbons = true; | |
| 18 origin.send(st.reply(stanza)); | |
| 19 return true | |
| 20 end | |
| 21 end); | |
| 22 | |
| 23 module:hook("iq/self/"..xmlns_carbons..":disable", function(event) | |
| 24 local origin, stanza = event.origin, event.stanza; | |
| 25 if stanza.attr.type == "set" then | |
| 26 module:log("debug", "%s disabled carbons", origin.full_jid); | |
| 27 origin.want_carbons = nil; | |
| 28 origin.send(st.reply(stanza)); | |
| 29 return true | |
| 30 end | |
| 31 end); | |
| 32 | |
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33 local function message_handler(event, c2s) |
| 462 | 34 local origin, stanza = event.origin, event.stanza; |
| 35 local orig_type = stanza.attr.type; | |
| 36 local orig_to = stanza.attr.to; | |
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37 local orig_from = stanza.attr.from; |
| 462 | 38 |
| 39 if not (orig_type == nil | |
| 40 or orig_type == "normal" | |
| 41 or orig_type == "chat") then | |
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42 return -- No carbons for messages of type error or headline |
| 462 | 43 end |
| 44 | |
| 45 local bare_jid, user_sessions; | |
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46 local no_carbon_to = {}; |
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47 module:log("debug", "Message from %s to %s", tostring(orig_from), tostring(orig_to)); |
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48 if c2s then -- Stanza sent by a local client |
| 462 | 49 bare_jid = (origin.username.."@"..origin.host) |
| 50 user_sessions = host_sessions[origin.username]; | |
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51 else -- Stanza about to be delivered to a local client |
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52 local username, hostname, resource = jid_split(orig_to); |
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53 bare_jid = jid_bare(orig_to); |
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54 user_sessions = host_sessions[username]; |
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55 if resource then |
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56 module:log("debug", "Message was to resource %s, it will not get carbon", resource); |
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57 no_carbon_to[resource] = true; |
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58 elseif user_sessions then |
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59 local top_resources = user_sessions.top_resources; |
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60 if top_resources then |
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61 for _, session in ipairs(top_resources) do |
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62 module:log("debug", "Not sending carbons to top resource %s", session.resource); |
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63 no_carbon_to[session.resource] = true; |
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64 end |
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65 end |
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66 end |
| 462 | 67 end |
| 68 | |
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69 if not user_sessions then |
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70 module:log("debug", "Skip carbons for offline user"); |
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71 return -- No use in sending carbons to an offline user |
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72 end |
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73 |
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74 if not c2s and stanza:get_child("private", xmlns_carbons) then |
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75 stanza:maptags(function(tag) |
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76 return tag.attr.xmlns == xmlns_carbons |
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77 and tag.name == "private" and tag or nil; |
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78 end); |
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79 module:log("debug", "Message tagged private, ignoring"); |
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80 return |
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81 end |
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82 |
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83 local msg = st.clone(stanza); |
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84 msg.attr.xmlns = "jabber:client"; |
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85 local fwd = st.message{ from = bare_jid, type = orig_type, } |
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86 :tag(c2s and "sent" or "received", { xmlns = xmlns_carbons }):up() |
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87 :tag("forwarded", { xmlns = xmlns_forward }) |
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88 :add_child(msg):reset(); |
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89 |
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90 user_sessions = user_sessions and user_sessions.sessions; |
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91 for resource, session in pairs(user_sessions) do |
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92 local full_jid = bare_jid .. "/" .. resource; |
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93 if session.want_carbons and ((c2s and session ~= origin) or (not c2s and not no_carbon_to[resource])) then |
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94 fwd.attr.to = full_jid; |
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95 module:log("debug", "Sending carbon to %s", full_jid); |
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96 session.send(fwd); |
| 462 | 97 end |
| 98 end | |
| 99 end | |
| 100 | |
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101 local function c2s_message_handler(event) |
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102 return message_handler(event, true) |
| 462 | 103 end |
| 104 | |
| 105 -- Stanzas sent by local clients | |
| 106 module:hook("pre-message/bare", c2s_message_handler, 1); | |
| 107 module:hook("pre-message/full", c2s_message_handler, 1); | |
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108 -- Stanzas to local clients |
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109 module:hook("message/bare", message_handler, 1); |
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110 module:hook("message/full", message_handler, 1); |
| 462 | 111 |
| 112 module:add_feature(xmlns_carbons); |
