prosody
25237002aba4
plugins/mod_pubsub/mod_pubsub.lua

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plugins/mod_pubsub/mod_pubsub.lua @ 8269:25237002aba4

mod_limits: Handle fractional outstanding balance values (caused by e3f7b6fa46ba) Fractional values were passed to string.sub() when doing buffer manipulations, and caused random bytes to be skipped in the stream.
author Matthew Wild <mwild1@gmail.com>
date Tue, 26 Sep 2017 17:48:33 +0100
parent 7983:879be73c0a58
child 7984:ae3c5abb3336
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 local pubsub = require "util.pubsub";
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2 local st = require "util.stanza";
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3 local jid_bare = require "util.jid".bare;
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4 local usermanager = require "core.usermanager";
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5
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6 local xmlns_pubsub = "http://jabber.org/protocol/pubsub";
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7 local xmlns_pubsub_event = "http://jabber.org/protocol/pubsub#event";
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8 local xmlns_pubsub_owner = "http://jabber.org/protocol/pubsub#owner";
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9
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10 local autocreate_on_publish = module:get_option_boolean("autocreate_on_publish", false);
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11 local autocreate_on_subscribe = module:get_option_boolean("autocreate_on_subscribe", false);
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12 local pubsub_disco_name = module:get_option_string("name", "Prosody PubSub Service");
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13 local expose_publisher = module:get_option_boolean("expose_publisher", false)
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14
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15 local service;
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16
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17 local lib_pubsub = module:require "pubsub";
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18 local handlers = lib_pubsub.handlers;
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19 local pubsub_error_reply = lib_pubsub.pubsub_error_reply;
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20
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21 module:depends("disco");
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22 module:add_identity("pubsub", "service", pubsub_disco_name);
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23 module:add_feature("http://jabber.org/protocol/pubsub");
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24
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25 function handle_pubsub_iq(event)
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26 local origin, stanza = event.origin, event.stanza;
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27 local pubsub = stanza.tags[1];
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28 local action = pubsub.tags[1];
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29 if not action then
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30 origin.send(st.error_reply(stanza, "cancel", "bad-request"));
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31 return true;
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32 end
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33 local handler = handlers[stanza.attr.type.."_"..action.name];
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34 if handler then
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35 handler(origin, stanza, action, service);
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36 return true;
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37 end
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38 end
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39
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40 function simple_broadcast(kind, node, jids, item, actor)
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41 if item then
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42 item = st.clone(item);
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43 item.attr.xmlns = nil; -- Clear the pubsub namespace
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44 if expose_publisher and actor then
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45 item.attr.publisher = actor
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46 end
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47 end
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48 local message = st.message({ from = module.host, type = "headline" })
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49 :tag("event", { xmlns = xmlns_pubsub_event })
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50 :tag(kind, { node = node })
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51 :add_child(item);
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52 for jid in pairs(jids) do
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53 module:log("debug", "Sending notification to %s", jid);
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54 message.attr.to = jid;
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55 module:send(message);
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56 end
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57 end
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58
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59 module:hook("iq/host/"..xmlns_pubsub..":pubsub", handle_pubsub_iq);
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60 module:hook("iq/host/"..xmlns_pubsub_owner..":pubsub", handle_pubsub_iq);
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61
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62 local feature_map = {
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63 create = { "create-nodes", "instant-nodes", "item-ids" };
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64 retract = { "delete-items", "retract-items" };
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65 purge = { "purge-nodes" };
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66 publish = { "publish", autocreate_on_publish and "auto-create" };
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67 delete = { "delete-nodes" };
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68 get_items = { "retrieve-items" };
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69 add_subscription = { "subscribe" };
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70 get_subscriptions = { "retrieve-subscriptions" };
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71 set_configure = { "config-node" };
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72 get_default = { "retrieve-default" };
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73 };
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74
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75 local function add_disco_features_from_service(service)
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76 for method, features in pairs(feature_map) do
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77 if service[method] then
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78 for _, feature in ipairs(features) do
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79 if feature then
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80 module:add_feature(xmlns_pubsub.."#"..feature);
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81 end
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82 end
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83 end
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84 end
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85 for affiliation in pairs(service.config.capabilities) do
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86 if affiliation ~= "none" and affiliation ~= "owner" then
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87 module:add_feature(xmlns_pubsub.."#"..affiliation.."-affiliation");
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88 end
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89 end
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90 end
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91
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92 module:hook("host-disco-info-node", function (event)
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93 local stanza, origin, reply, node = event.stanza, event.origin, event.reply, event.node;
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94 local ok, ret = service:get_nodes(stanza.attr.from);
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95 if not ok or not ret[node] then
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96 return;
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97 end
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98 event.exists = true;
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99 reply:tag("identity", { category = "pubsub", type = "leaf" });
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100 end);
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101
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102 module:hook("host-disco-items-node", function (event)
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103 local stanza, origin, reply, node = event.stanza, event.origin, event.reply, event.node;
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104 local ok, ret = service:get_items(node, stanza.attr.from);
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105 if not ok then
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106 return;
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107 end
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108
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109 for _, id in ipairs(ret) do
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110 reply:tag("item", { jid = module.host, name = id }):up();
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111 end
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112 event.exists = true;
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113 end);
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114
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115
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116 module:hook("host-disco-items", function (event)
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117 local stanza, origin, reply = event.stanza, event.origin, event.reply;
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118 local ok, ret = service:get_nodes(event.stanza.attr.from);
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119 if not ok then
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120 return;
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121 end
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122 for node, node_obj in pairs(ret) do
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123 reply:tag("item", { jid = module.host, node = node, name = node_obj.config.name }):up();
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124 end
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125 end);
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126
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127 local admin_aff = module:get_option_string("default_admin_affiliation", "owner");
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128 local function get_affiliation(jid)
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129 local bare_jid = jid_bare(jid);
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130 if bare_jid == module.host or usermanager.is_admin(bare_jid, module.host) then
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131 return admin_aff;
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132 end
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133 end
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134
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135 function set_service(new_service)
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136 service = new_service;
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137 module.environment.service = service;
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138 add_disco_features_from_service(service);
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139 end
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140
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141 function module.save()
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142 return { service = service };
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143 end
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144
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145 function module.restore(data)
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146 set_service(data.service);
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147 end
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148
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149 function module.load()
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150 if module.reloading then return; end
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151
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152 set_service(pubsub.new({
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153 capabilities = {
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154 none = {
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155 create = false;
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156 publish = false;
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157 retract = false;
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158 get_nodes = true;
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159
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160 subscribe = true;
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161 unsubscribe = true;
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162 get_subscription = true;
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163 get_subscriptions = true;
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164 get_items = true;
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165
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166 subscribe_other = false;
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167 unsubscribe_other = false;
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168 get_subscription_other = false;
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169 get_subscriptions_other = false;
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170
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171 be_subscribed = true;
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172 be_unsubscribed = true;
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173
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174 set_affiliation = false;
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175 };
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176 publisher = {
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177 create = false;
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178 publish = true;
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179 retract = true;
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180 get_nodes = true;
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181
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182 subscribe = true;
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183 unsubscribe = true;
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184 get_subscription = true;
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185 get_subscriptions = true;
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186 get_items = true;
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187
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188 subscribe_other = false;
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189 unsubscribe_other = false;
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190 get_subscription_other = false;
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191 get_subscriptions_other = false;
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192
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193 be_subscribed = true;
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194 be_unsubscribed = true;
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195
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196 set_affiliation = false;
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197 };
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198 owner = {
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199 create = true;
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200 publish = true;
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201 retract = true;
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202 delete = true;
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203 get_nodes = true;
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204 configure = true;
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205
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206 subscribe = true;
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207 unsubscribe = true;
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208 get_subscription = true;
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209 get_subscriptions = true;
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210 get_items = true;
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211
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212
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213 subscribe_other = true;
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214 unsubscribe_other = true;
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215 get_subscription_other = true;
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216 get_subscriptions_other = true;
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217
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218 be_subscribed = true;
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219 be_unsubscribed = true;
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220
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221 set_affiliation = true;
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222 };
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223 };
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224
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225 autocreate_on_publish = autocreate_on_publish;
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226 autocreate_on_subscribe = autocreate_on_subscribe;
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227
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228 broadcaster = simple_broadcast;
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229 get_affiliation = get_affiliation;
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230
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231 normalize_jid = jid_bare;
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232 }));
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233 end