Wed, 21 Oct 2009 13:59:54 +0100
connlisteners: Localize tostring, fixes possible traceback when LuaSec not installed
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1 | -- Prosody IM |
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2 | -- Copyright (C) 2008-2009 Matthew Wild |
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3 | -- Copyright (C) 2008-2009 Waqas Hussain |
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4 | -- |
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5 | -- This project is MIT/X11 licensed. Please see the |
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6 | -- COPYING file in the source package for more information. |
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7 | -- |
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8 | |
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9 | |
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10 | local jid_bare = require "util.jid".bare; |
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11 | local jid_split = require "util.jid".split; |
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12 | local st = require "util.stanza"; |
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13 | local hosts = hosts; |
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14 | local user_exists = require "core.usermanager".user_exists; |
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15 | local is_contact_subscribed = require "core.rostermanager".is_contact_subscribed; |
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16 | local pairs, ipairs = pairs, ipairs; |
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17 | local next = next; |
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18 | local type = type; |
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19 | local load_roster = require "core.rostermanager".load_roster; |
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20 | local sha1 = require "util.hashes".sha1; |
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21 | local base64 = require "util.encodings".base64.encode; |
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22 | |
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23 | local NULL = {}; |
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24 | local data = {}; |
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25 | local recipients = {}; |
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26 | local hash_map = {}; |
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27 | |
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28 | module:add_identity("pubsub", "pep", "Prosody"); |
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29 | module:add_feature("http://jabber.org/protocol/pubsub#publish"); |
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30 | |
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31 | local function publish(session, node, item) |
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32 | local disable = #item.tags ~= 1 or #item.tags[1].tags == 0; |
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33 | if #item.tags == 0 then item.name = "retract"; end |
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34 | local bare = session.username..'@'..session.host; |
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35 | local stanza = st.message({from=bare, type='headline'}) |
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36 | :tag('event', {xmlns='http://jabber.org/protocol/pubsub#event'}) |
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37 | :tag('items', {node=node}) |
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38 | :add_child(item) |
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39 | :up() |
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40 | :up(); |
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41 | |
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42 | -- store for the future |
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43 | local user_data = data[bare]; |
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44 | if disable then |
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45 | if user_data then |
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46 | user_data[node] = nil; |
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47 | if not next(user_data) then data[bare] = nil; end |
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48 | end |
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49 | else |
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50 | if not user_data then user_data = {}; data[bare] = user_data; end |
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51 | user_data[node] = stanza; |
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52 | end |
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53 | |
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54 | -- broadcast |
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55 | for recipient, notify in pairs(recipients[bare] or NULL) do |
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56 | if notify[node] then |
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57 | stanza.attr.to = recipient; |
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58 | core_post_stanza(session, stanza); |
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59 | end |
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60 | end |
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61 | end |
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62 | local function publish_all(user, recipient, session) |
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63 | local d = data[user]; |
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64 | local notify = recipients[user] and recipients[user][recipient]; |
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65 | if d and notify then |
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66 | for node in pairs(notify) do |
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67 | local message = d[node]; |
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68 | if message then |
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69 | message.attr.to = recipient; |
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70 | session.send(message); |
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71 | end |
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72 | end |
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73 | end |
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74 | end |
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75 | |
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76 | local function get_caps_hash_from_presence(stanza, current) |
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77 | local t = stanza.attr.type; |
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78 | if not t then |
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79 | for _, child in pairs(stanza.tags) do |
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80 | if child.name == "c" and child.attr.xmlns == "http://jabber.org/protocol/caps" then |
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81 | local attr = child.attr; |
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82 | if attr.hash then -- new caps |
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83 | if attr.hash == 'sha-1' and attr.node and attr.ver then return attr.ver, attr.node.."#"..attr.ver; end |
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84 | else -- legacy caps |
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85 | if attr.node and attr.ver then return attr.node.."#"..attr.ver.."#"..(attr.ext or ""), attr.node.."#"..attr.ver; end |
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86 | end |
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87 | return; -- bad caps format |
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88 | end |
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89 | end |
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90 | elseif t == "unavailable" or t == "error" then |
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91 | return; |
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92 | end |
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93 | return current; -- no caps, could mean caps optimization, so return current |
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94 | end |
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95 | |
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96 | module:hook("presence/bare", function(event) |
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97 | -- inbound presence to bare JID recieved |
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98 | local origin, stanza = event.origin, event.stanza; |
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99 | |
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100 | local user = stanza.attr.to or (origin.username..'@'..origin.host); |
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101 | local bare = jid_bare(stanza.attr.from); |
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102 | local item = load_roster(jid_split(user))[bare]; |
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103 | if not stanza.attr.to or (item and (item.subscription == 'from' or item.subscription == 'both')) then |
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104 | local recipient = stanza.attr.from; |
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105 | local current = recipients[user] and recipients[user][recipient]; |
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106 | local hash = get_caps_hash_from_presence(stanza, current); |
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107 | if current == hash then return; end |
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108 | if not hash then |
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109 | if recipients[user] then recipients[user][recipient] = nil; end |
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110 | else |
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111 | recipients[user] = recipients[user] or {}; |
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112 | if hash_map[hash] then |
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113 | recipients[user][recipient] = hash_map[hash]; |
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114 | publish_all(user, recipient, origin); |
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115 | else |
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116 | recipients[user][recipient] = hash; |
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117 | origin.send( |
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118 | st.stanza("iq", {from=stanza.attr.to, to=stanza.attr.from, id="disco", type="get"}) |
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119 | :query("http://jabber.org/protocol/disco#info") |
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120 | ); |
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121 | end |
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122 | end |
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123 | end |
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124 | end, 10); |
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125 | |
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126 | module:hook("iq/bare/http://jabber.org/protocol/pubsub:pubsub", function(event) |
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127 | local session, stanza = event.origin, event.stanza; |
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128 | if stanza.attr.type == 'set' and (not stanza.attr.to or jid_bare(stanza.attr.from) == stanza.attr.to) then |
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129 | local payload = stanza.tags[1]; |
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130 | if payload.name == 'pubsub' then -- <pubsub xmlns='http://jabber.org/protocol/pubsub'> |
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131 | payload = payload.tags[1]; |
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132 | if payload and (payload.name == 'publish' or payload.name == 'retract') and payload.attr.node then -- <publish node='http://jabber.org/protocol/tune'> |
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133 | local node = payload.attr.node; |
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134 | payload = payload.tags[1]; |
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135 | if payload then -- <item> |
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136 | publish(session, node, payload); |
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137 | session.send(st.reply(stanza)); |
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138 | return true; |
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139 | end |
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140 | end |
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141 | end |
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142 | end |
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143 | end); |
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144 | |
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145 | local function calculate_hash(disco_info) |
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146 | local identities, features, extensions = {}, {}, {}; |
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147 | for _, tag in pairs(disco_info) do |
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148 | if tag.name == "identity" then |
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149 | table.insert(identities, (tag.attr.category or "").."\0"..(tag.attr.type or "").."\0"..(tag.attr["xml:lang"] or "").."\0"..(tag.attr.name or "")); |
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150 | elseif tag.name == "feature" then |
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151 | table.insert(features, tag.attr.var or ""); |
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152 | elseif tag.name == "x" and tag.attr.xmlns == "jabber:x:data" then |
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153 | local form = {}; |
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154 | local FORM_TYPE; |
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155 | for _, field in pairs(tag.tags) do |
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156 | if field.name == "field" and field.attr.var then |
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157 | local values = {}; |
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158 | for _, val in pairs(field.tags) do |
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159 | val = #val.tags == 0 and table.concat(val); -- FIXME use get_text? |
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160 | if val then table.insert(values, val); end |
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161 | end |
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162 | table.sort(values); |
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163 | if field.attr.var == "FORM_TYPE" then |
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164 | FORM_TYPE = values[1]; |
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165 | elseif #values > 0 then |
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166 | table.insert(form, field.attr.var.."\0"..table.concat(values, "<")); |
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167 | else |
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168 | table.insert(form, field.attr.var); |
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169 | end |
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170 | end |
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171 | end |
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172 | table.sort(form); |
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173 | form = table.concat(form, "<"); |
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174 | if FORM_TYPE then form = FORM_TYPE.."\0"..form; end |
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175 | table.insert(extensions, form); |
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176 | end |
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177 | end |
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178 | table.sort(identities); |
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179 | table.sort(features); |
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180 | table.sort(extensions); |
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181 | if #identities > 0 then identities = table.concat(identities, "<"):gsub("%z", "/").."<"; else identities = ""; end |
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182 | if #features > 0 then features = table.concat(features, "<").."<"; else features = ""; end |
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183 | if #extensions > 0 then extensions = table.concat(extensions, "<"):gsub("%z", "<").."<"; else extensions = ""; end |
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184 | local S = identities..features..extensions; |
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185 | local ver = base64(sha1(S)); |
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186 | return ver, S; |
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187 | end |
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188 | |
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189 | module:hook("iq/bare/disco", function(event) |
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190 | local session, stanza = event.origin, event.stanza; |
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191 | if stanza.attr.type == "result" then |
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192 | local disco = stanza.tags[1]; |
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193 | if disco and disco.name == "query" and disco.attr.xmlns == "http://jabber.org/protocol/disco#info" then |
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194 | -- Process disco response |
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195 | local user = stanza.attr.to or (session.username..'@'..session.host); |
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196 | local contact = stanza.attr.from; |
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197 | local current = recipients[user] and recipients[user][contact]; |
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198 | if type(current) ~= "string" then return; end -- check if waiting for recipient's response |
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199 | local ver = current; |
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200 | if not string.find(current, "#") then |
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201 | ver = calculate_hash(disco.tags); -- calculate hash |
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202 | end |
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203 | local notify = {}; |
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204 | for _, feature in pairs(disco.tags) do |
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205 | if feature.name == "feature" and feature.attr.var then |
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206 | local nfeature = feature.attr.var:match("^(.*)%+notify$"); |
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207 | if nfeature then notify[nfeature] = true; end |
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208 | end |
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209 | end |
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210 | hash_map[ver] = notify; -- update hash map |
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211 | recipients[user][contact] = notify; -- set recipient's data to calculated data |
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212 | -- send messages to recipient |
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213 | publish_all(user, contact, session); |
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214 | end |
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215 | end |
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216 | end); |