prosody
f56eeff93847
plugins/mod_disco.lua

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plugins/mod_disco.lua @ 4845:f56eeff93847

Merge with backout
author Matthew Wild <mwild1@gmail.com>
date Fri, 11 May 2012 01:46:41 +0100
parent 4337:a2ee8ab82dd9
child 4985:0f72123ff513
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1 -- Prosody IM
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2 -- Copyright (C) 2008-2010 Matthew Wild
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3 -- Copyright (C) 2008-2010 Waqas Hussain
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4 --
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b1885732e979 GPL->MIT!
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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 local get_children = require "core.hostmanager".get_children;
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10 local is_contact_subscribed = require "core.rostermanager".is_contact_subscribed;
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11 local jid_split = require "util.jid".split;
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12 local jid_bare = require "util.jid".bare;
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13 local st = require "util.stanza"
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14 local calculate_hash = require "util.caps".calculate_hash;
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15
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16 local disco_items = module:get_option("disco_items") or {};
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17 do -- validate disco_items
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18 for _, item in ipairs(disco_items) do
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19 local err;
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20 if type(item) ~= "table" then
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21 err = "item is not a table";
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22 elseif type(item[1]) ~= "string" then
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23 err = "item jid is not a string";
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24 elseif item[2] and type(item[2]) ~= "string" then
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25 err = "item name is not a string";
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26 end
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27 if err then
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28 module:log("error", "option disco_items is malformed: %s", err);
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29 disco_items = {}; -- TODO clean up data instead of removing it?
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30 break;
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31 end
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32 end
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33 end
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34
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35 module:add_identity("server", "im", "Prosody"); -- FIXME should be in the non-existing mod_router
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36 module:add_feature("http://jabber.org/protocol/disco#info");
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37 module:add_feature("http://jabber.org/protocol/disco#items");
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38
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39 -- Generate and cache disco result and caps hash
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40 local _cached_server_disco_info, _cached_server_caps_feature, _cached_server_caps_hash;
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41 local function build_server_disco_info()
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42 local query = st.stanza("query", { xmlns = "http://jabber.org/protocol/disco#info" });
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43 local done = {};
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44 for _,identity in ipairs(module:get_host_items("identity")) do
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45 local identity_s = identity.category.."\0"..identity.type;
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46 if not done[identity_s] then
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47 query:tag("identity", identity):up();
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48 done[identity_s] = true;
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49 end
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50 end
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51 for _,feature in ipairs(module:get_host_items("feature")) do
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52 if not done[feature] then
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53 query:tag("feature", {var=feature}):up();
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54 done[feature] = true;
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55 end
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56 end
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57 for _,extension in ipairs(module:get_host_items("extension")) do
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58 if not done[extension] then
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59 query:add_child(extension);
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60 done[extension] = true;
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61 end
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62 end
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63 _cached_server_disco_info = query;
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64 _cached_server_caps_hash = calculate_hash(query);
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65 _cached_server_caps_feature = st.stanza("c", {
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66 xmlns = "http://jabber.org/protocol/caps";
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67 hash = "sha-1";
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68 node = "http://prosody.im";
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69 ver = _cached_server_caps_hash;
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70 });
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71 end
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72 local function clear_disco_cache()
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73 _cached_server_disco_info, _cached_server_caps_feature, _cached_server_caps_hash = nil, nil, nil;
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74 end
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75 local function get_server_disco_info()
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76 if not _cached_server_disco_info then build_server_disco_info(); end
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77 return _cached_server_disco_info;
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78 end
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79 local function get_server_caps_feature()
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80 if not _cached_server_caps_feature then build_server_disco_info(); end
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81 return _cached_server_caps_feature;
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82 end
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83 local function get_server_caps_hash()
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84 if not _cached_server_caps_hash then build_server_disco_info(); end
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85 return _cached_server_caps_hash;
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86 end
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87
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88 module:hook("item-added/identity", clear_disco_cache);
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89 module:hook("item-added/feature", clear_disco_cache);
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90 module:hook("item-added/extension", clear_disco_cache);
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91 module:hook("item-removed/identity", clear_disco_cache);
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92 module:hook("item-removed/feature", clear_disco_cache);
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93 module:hook("item-removed/extension", clear_disco_cache);
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94
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95 -- Handle disco requests to the server
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96 module:hook("iq/host/http://jabber.org/protocol/disco#info:query", function(event)
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97 local origin, stanza = event.origin, event.stanza;
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98 if stanza.attr.type ~= "get" then return; end
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99 local node = stanza.tags[1].attr.node;
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100 if node and node ~= "" and node ~= "http://prosody.im#"..get_server_caps_hash() then return; end -- TODO fire event?
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101 local reply_query = get_server_disco_info();
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102 reply_query.node = node;
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103 local reply = st.reply(stanza):add_child(reply_query);
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104 origin.send(reply);
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105 return true;
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106 end);
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107 module:hook("iq/host/http://jabber.org/protocol/disco#items:query", function(event)
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108 local origin, stanza = event.origin, event.stanza;
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109 if stanza.attr.type ~= "get" then return; end
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110 local node = stanza.tags[1].attr.node;
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111 if node and node ~= "" then return; end -- TODO fire event?
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112
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113 local reply = st.reply(stanza):query("http://jabber.org/protocol/disco#items");
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114 for jid in pairs(get_children(module.host)) do
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115 reply:tag("item", {jid = jid}):up();
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116 end
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117 for _, item in ipairs(disco_items) do
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118 reply:tag("item", {jid=item[1], name=item[2]}):up();
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119 end
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120 origin.send(reply);
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121 return true;
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122 end);
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123
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124 -- Handle caps stream feature
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125 module:hook("stream-features", function (event)
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126 if event.origin.type == "c2s" then
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127 event.features:add_child(get_server_caps_feature());
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128 end
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129 end);
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130
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131 -- Handle disco requests to user accounts
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132 module:hook("iq/bare/http://jabber.org/protocol/disco#info:query", function(event)
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133 local origin, stanza = event.origin, event.stanza;
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134 if stanza.attr.type ~= "get" then return; end
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135 local node = stanza.tags[1].attr.node;
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136 if node and node ~= "" then return; end -- TODO fire event?
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137 local username = jid_split(stanza.attr.to) or origin.username;
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138 if not stanza.attr.to or is_contact_subscribed(username, module.host, jid_bare(stanza.attr.from)) then
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139 local reply = st.reply(stanza):tag('query', {xmlns='http://jabber.org/protocol/disco#info'});
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140 if not reply.attr.from then reply.attr.from = origin.username.."@"..origin.host; end -- COMPAT To satisfy Psi when querying own account
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141 module:fire_event("account-disco-info", { origin = origin, stanza = reply });
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142 origin.send(reply);
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143 return true;
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144 end
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145 end);
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146 module:hook("iq/bare/http://jabber.org/protocol/disco#items:query", function(event)
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147 local origin, stanza = event.origin, event.stanza;
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148 if stanza.attr.type ~= "get" then return; end
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149 local node = stanza.tags[1].attr.node;
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150 if node and node ~= "" then return; end -- TODO fire event?
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151 local username = jid_split(stanza.attr.to) or origin.username;
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152 if not stanza.attr.to or is_contact_subscribed(username, module.host, jid_bare(stanza.attr.from)) then
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153 local reply = st.reply(stanza):tag('query', {xmlns='http://jabber.org/protocol/disco#items'});
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154 if not reply.attr.from then reply.attr.from = origin.username.."@"..origin.host; end -- COMPAT To satisfy Psi when querying own account
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155 module:fire_event("account-disco-items", { origin = origin, stanza = reply });
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156 origin.send(reply);
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157 return true;
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158 end
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159 end);