prosody-modules
2b10e51d85a6
mod_service_directories/mod_service_directories.lua

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mod_service_directories/mod_service_directories.lua @ 3965:2b10e51d85a6

mod_muc_limits: Add config option to limit to join stanzas only This is a bit more limited in pre-0.11 MUC modules, because it just detects stanzas sent to full JIDs (which would include all presence and nick changes). This option is useful for setups where users are typically unaffiliated, but trusted (e.g. if access to the room is gated through some other means such as password/token auth).
author Matthew Wild <mwild1@gmail.com>
date Fri, 03 Apr 2020 12:26:56 +0100
parent 1343:7dbde05b48a9
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1 -- Prosody IM
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2 -- Copyright (C) 2011 Waqas Hussain
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3 --
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4 -- This project is MIT/X11 licensed. Please see the
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5 -- COPYING file in the source package for more information.
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6 --
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8 -- An implementation of [XEP-0309: Service Directories]
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10 -- Imports and defines
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12 local st = require "util.stanza";
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13 local jid_split = require "util.jid".split;
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14 local adhoc_new = module:require "adhoc".new;
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15 local to_ascii = require "util.encodings".idna.to_ascii;
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16 local nameprep = require "util.encodings".stringprep.nameprep;
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17 local dataforms_new = require "util.dataforms".new;
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18 local pairs, ipairs = pairs, ipairs;
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19 local module = module;
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20 local hosts = hosts;
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22 local subscription_from = {};
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23 local subscription_to = {};
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24 local contact_features = {};
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25 local contact_vcards = {};
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27 -- Advertise in disco
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28
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29 module:add_identity("server", "directory", module:get_option_string("name", "Prosody"));
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30 module:add_feature("urn:xmpp:server-presence");
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32 -- Handle subscriptions
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34 module:hook("presence/host", function(event) -- inbound presence to the host
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35 local origin, stanza = event.origin, event.stanza;
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37 local node, host, resource = jid_split(stanza.attr.from);
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38 if stanza.attr.from ~= host then return; end -- not from a host
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40 local t = stanza.attr.type;
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41 if t == "probe" then
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42 module:send(st.presence({ from = module.host, to = host, id = stanza.attr.id }));
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43 elseif t == "subscribe" then
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44 subscription_from[host] = true;
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45 module:send(st.presence({ from = module.host, to = host, id = stanza.attr.id, type = "subscribed" }));
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46 module:send(st.presence({ from = module.host, to = host, id = stanza.attr.id }));
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47 add_contact(host);
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48 elseif t == "subscribed" then
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49 subscription_to[host] = true;
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50 query_host(host);
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51 elseif t == "unsubscribe" then
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52 subscription_from[host] = nil;
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53 module:send(st.presence({ from = module.host, to = host, id = stanza.attr.id, type = "unsubscribed" }));
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54 remove_contact(host);
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55 elseif t == "unsubscribed" then
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56 subscription_to[host] = nil;
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57 remove_contact(host);
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58 end
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59 return true;
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60 end, 10); -- priority over mod_presence
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61
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62 function remove_contact(host, id)
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63 contact_features[host] = nil;
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64 contact_vcards[host] = nil;
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65 if subscription_to[host] then
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66 subscription_to[host] = nil;
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67 module:send(st.presence({ from = module.host, to = host, id = id, type = "unsubscribe" }));
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68 end
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69 if subscription_from[host] then
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70 subscription_from[host] = nil;
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71 module:send(st.presence({ from = module.host, to = host, id = id, type = "unsubscribed" }));
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72 end
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73 end
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74 function add_contact(host, id)
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75 if not subscription_to[host] then
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76 module:send(st.presence({ from = module.host, to = host, id = id, type = "subscribe" }));
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77 end
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78 end
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80 -- Admin ad-hoc command to subscribe
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81
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82 local function add_contact_handler(self, data, state)
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83 local layout = dataforms_new{
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84 title = "Adding a Server Buddy";
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85 instructions = "Fill out this form to add a \"server buddy\".";
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86
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87 { name = "FORM_TYPE", type = "hidden", value = "http://jabber.org/protocol/admin" };
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88 { name = "peerjid", type = "jid-single", required = true, label = "The server to add" };
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89 };
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90
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91 if not state then
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92 return { status = "executing", form = layout }, "executing";
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93 elseif data.action == "canceled" then
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94 return { status = "canceled" };
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95 else
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96 local fields = layout:data(data.form);
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97 local peerjid = nameprep(fields.peerjid);
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98 if not peerjid or peerjid == "" or #peerjid > 1023 or not to_ascii(peerjid) then
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99 return { status = "completed", error = { message = "Invalid JID" } };
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100 end
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101 add_contact(peerjid);
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102 return { status = "completed" };
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103 end
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104 end
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105
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106 local add_contact_command = adhoc_new("Adding a Server Buddy", "http://jabber.org/protocol/admin#server-buddy", add_contact_handler, "admin");
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107 module:add_item("adhoc", add_contact_command);
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108
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109 -- Disco query remote host
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110 function query_host(host)
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111 local stanza = st.iq({ from = module.host, to = host, type = "get", id = "mod_service_directories:disco" })
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112 :query("http://jabber.org/protocol/disco#info");
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113 module:send(stanza);
552
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114 end
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115
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116 -- Handle disco query result
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117 module:hook("iq-result/bare/mod_service_directories:disco", function(event)
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118 local origin, stanza = event.origin, event.stanza;
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119
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120 if not subscription_to[stanza.attr.from] then return; end -- not from a contact
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121 local host = stanza.attr.from;
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122
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123 local query = stanza:get_child("query", "http://jabber.org/protocol/disco#info")
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124 if not query then return; end
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125
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126 -- extract disco features
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127 local features = {};
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128 for _,tag in ipairs(query.tags) do
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129 if tag.name == "feature" and tag.attr.var then
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130 features[tag.attr.var] = true;
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131 end
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132 end
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133 contact_features[host] = features;
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134
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135 if features["urn:ietf:params:xml:ns:vcard-4.0"] then
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136 local stanza = st.iq({ from = module.host, to = host, type = "get", id = "mod_service_directories:vcard" })
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137 :tag("vcard", { xmlns = "urn:ietf:params:xml:ns:vcard-4.0" });
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138 module:send(stanza);
552
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139 end
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140 return true;
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141 end);
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142
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143 -- Handle vcard result
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144 module:hook("iq-result/bare/mod_service_directories:vcard", function(event)
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145 local origin, stanza = event.origin, event.stanza;
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146
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147 if not subscription_to[stanza.attr.from] then return; end -- not from a contact
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148 local host = stanza.attr.from;
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149
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150 local vcard = stanza:get_child("vcard", "urn:ietf:params:xml:ns:vcard-4.0");
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151 if not vcard then return; end
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152
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153 contact_vcards[host] = st.clone(vcard);
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154 return true;
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155 end);
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156
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157 -- PubSub
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158
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159 -- TODO the following should be replaced by mod_pubsub
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160
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161 module:hook("iq-get/host/http://jabber.org/protocol/pubsub:pubsub", function(event)
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162 local origin, stanza = event.origin, event.stanza;
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163 local payload = stanza.tags[1];
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164
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165 local items = payload:get_child("items", "http://jabber.org/protocol/pubsub");
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166 if items and items.attr.node == "urn:xmpp:contacts" then
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167 local reply = st.reply(stanza)
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168 :tag("pubsub", { xmlns = "http://jabber.org/protocol/pubsub" })
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169 :tag("items", { node = "urn:xmpp:contacts" });
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170 for host, vcard in pairs(contact_vcards) do
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171 reply:tag("item", { id = host })
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172 :add_child(vcard)
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173 :up();
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174 end
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175 origin.send(reply);
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176 return true;
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177 end
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178 end);
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179