prosody
37e814a680ab
plugins/mod_pubsub/mod_pubsub.lua

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plugins/mod_pubsub/mod_pubsub.lua @ 9158:37e814a680ab

mod_pubsub, mod_pep, util.pubsub: Move capability definitions into util.pubsub to avoid duplication
author Matthew Wild <mwild1@gmail.com>
date Wed, 08 Aug 2018 20:48:02 +0100
parent 9139:24a1e7a9d463
child 9179:82fad995a149
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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 local new_id = require "util.id".medium;
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6
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7 local xmlns_pubsub = "http://jabber.org/protocol/pubsub";
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8 local xmlns_pubsub_event = "http://jabber.org/protocol/pubsub#event";
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9 local xmlns_pubsub_owner = "http://jabber.org/protocol/pubsub#owner";
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10
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11 local autocreate_on_publish = module:get_option_boolean("autocreate_on_publish", false);
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12 local autocreate_on_subscribe = module:get_option_boolean("autocreate_on_subscribe", false);
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13 local pubsub_disco_name = module:get_option_string("name", "Prosody PubSub Service");
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14 local expose_publisher = module:get_option_boolean("expose_publisher", false)
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15
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16 local service;
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17
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18 local lib_pubsub = module:require "pubsub";
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19
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20 module:depends("disco");
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21 module:add_identity("pubsub", "service", pubsub_disco_name);
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22 module:add_feature("http://jabber.org/protocol/pubsub");
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23
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24 function handle_pubsub_iq(event)
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25 return lib_pubsub.handle_pubsub_iq(event, service);
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26 end
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27
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28 -- An itemstore supports the following methods:
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29 -- items(): iterator over (id, item)
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30 -- get(id): return item with id
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31 -- set(id, item): set id to item
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32 -- clear(): clear all items
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33 -- resize(n): set new limit and trim oldest items
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34 -- tail(): return the latest item
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35
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36 -- A nodestore supports the following methods:
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37 -- set(node_name, node_data)
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38 -- get(node_name)
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39 -- users(): iterator over (node_name)
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40
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41
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42 local node_store = module:open_store(module.name.."_nodes");
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43
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44 local function create_simple_itemstore(node_config, node_name)
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45 local archive = module:open_store("pubsub_"..node_name, "archive");
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46 return lib_pubsub.archive_itemstore(archive, node_config, nil, node_name);
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47 end
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48
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49 function simple_broadcast(kind, node, jids, item, actor, node_obj)
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50 if item then
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51 item = st.clone(item);
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52 item.attr.xmlns = nil; -- Clear the pubsub namespace
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53 if expose_publisher and actor then
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54 item.attr.publisher = actor
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55 end
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56 end
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57
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58 local id = new_id();
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59 local msg_type = node_obj and node_obj.config.message_type or "headline";
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60 local message = st.message({ from = module.host, type = msg_type, id = id })
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61 :tag("event", { xmlns = xmlns_pubsub_event })
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62 :tag(kind, { node = node })
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63
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64 if item then
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65 message:add_child(item);
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66 end
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67
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68 local summary;
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69 -- Compose a sensible textual representation of at least Atom payloads
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70 if item and item.tags[1] then
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71 local payload = item.tags[1];
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72 summary = module:fire_event("pubsub-summary/"..payload.attr.xmlns, {
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73 kind = kind, node = node, jids = jids, actor = actor, item = item, payload = payload,
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74 });
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75 end
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76
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77 for jid, options in pairs(jids) do
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78 local new_stanza = st.clone(message);
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79 if summary and type(options) == "table" and options["pubsub#include_body"] then
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80 new_stanza:body(summary);
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81 end
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82 new_stanza.attr.to = jid;
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83 module:send(new_stanza);
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84 end
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85 end
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86
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87 local max_max_items = module:get_option_number("pubsub_max_items", 256);
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88 function check_node_config(node, actor, new_config) -- luacheck: ignore 212/actor 212/node
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89 if (new_config["max_items"] or 1) > max_max_items then
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90 return false;
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91 end
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92 if new_config["access_model"] ~= "whitelist" and new_config["access_model"] ~= "open" then
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93 return false;
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94 end
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95 return true;
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96 end
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97
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98 function is_item_stanza(item)
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99 return st.is_stanza(item) and item.attr.xmlns == xmlns_pubsub and item.name == "item";
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100 end
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101
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102 module:hook("pubsub-summary/http://www.w3.org/2005/Atom", function (event)
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103 local payload = event.item;
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104 local title = payload:get_child_text("title");
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105 local summary = payload:get_child_text("summary");
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106 if not summary and title then
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107 local author = payload:find("author/name#");
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108 summary = title;
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109 if author then
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110 summary = author .. " posted " .. summary;
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111 end
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112 end
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113 return summary;
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114 end);
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115
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116 module:hook("iq/host/"..xmlns_pubsub..":pubsub", handle_pubsub_iq);
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117 module:hook("iq/host/"..xmlns_pubsub_owner..":pubsub", handle_pubsub_iq);
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118
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119 local function add_disco_features_from_service(service) --luacheck: ignore 431/service
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120 for feature in lib_pubsub.get_feature_set(service) do
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121 module:add_feature(xmlns_pubsub.."#"..feature);
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122 end
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123 end
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124
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125 module:hook("host-disco-info-node", function (event)
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126 return lib_pubsub.handle_disco_info_node(event, service);
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127 end);
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128
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129 module:hook("host-disco-items-node", function (event)
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130 return lib_pubsub.handle_disco_items_node(event, service);
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131 end);
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132
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133
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134 module:hook("host-disco-items", function (event)
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135 local stanza, reply = event.stanza, event.reply;
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136 local ok, ret = service:get_nodes(stanza.attr.from);
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137 if not ok then
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138 return;
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139 end
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140 for node, node_obj in pairs(ret) do
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141 reply:tag("item", { jid = module.host, node = node, name = node_obj.config.name }):up();
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142 end
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143 end);
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144
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145 local admin_aff = module:get_option_string("default_admin_affiliation", "owner");
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146 local function get_affiliation(jid)
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147 local bare_jid = jid_bare(jid);
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148 if bare_jid == module.host or usermanager.is_admin(bare_jid, module.host) then
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149 return admin_aff;
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150 end
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151 end
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152
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153 function get_service()
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154 return service;
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155 end
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156
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157 function set_service(new_service)
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158 service = new_service;
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159 module.environment.service = service;
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160 add_disco_features_from_service(service);
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161 end
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162
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163 function module.save()
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164 return { service = service };
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165 end
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166
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167 function module.restore(data)
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168 set_service(data.service);
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169 end
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170
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171 function module.load()
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172 if module.reloading then return; end
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173
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174 set_service(pubsub.new({
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175 autocreate_on_publish = autocreate_on_publish;
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176 autocreate_on_subscribe = autocreate_on_subscribe;
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177
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178 nodestore = node_store;
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179 itemstore = create_simple_itemstore;
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180 broadcaster = simple_broadcast;
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181 itemcheck = is_item_stanza;
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182 check_node_config = check_node_config;
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183 get_affiliation = get_affiliation;
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184
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185 normalize_jid = jid_bare;
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186 }));
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187 end