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annotate mod_muc_rtbl/mod_muc_rtbl.lua @ 5648:c217f4edfc4f

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misc/mtail: Start of an mtail config Stashing it here in case anyone wants to continue working on it. Currently it's only counting log messages by level. Due to the permissions set by systemd on Prosody logs, mtail never managed to start correctly until permissions were manually relaxed.
author Kim Alvefur <zash@zash.se>
date Sun, 17 Sep 2023 13:36:30 +0200
parents f6577cdb1d91
children
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rev   line source
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1 local array = require "util.array";
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2 local it = require "util.iterators";
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3 local jid = require "util.jid";
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4 local sha256 = require "util.hashes".sha256;
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5 local set = require "util.set";
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6 local st = require "util.stanza";
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7
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8 local rtbl_service_jid = assert(module:get_option_string("muc_rtbl_jid"), "No RTBL JID supplied");
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9 local rtbl_node = module:get_option_string("muc_rtbl_node", "muc_bans_sha256");
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10
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11 local banned_hashes = module:shared("banned_hashes");
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12
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13 module:depends("pubsub_subscription");
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14
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15 module:add_item("pubsub-subscription", {
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16 service = rtbl_service_jid;
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17 node = rtbl_node;
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18
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19 -- Callbacks:
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20 on_subscribed = function()
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21 module:log("info", "RTBL active");
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22 end;
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23
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24 on_error = function(err)
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25 module:log("error", "Failed to subscribe to RTBL: %s::%s: %s", err.type, err.condition, err.text);
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26 end;
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27
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28 on_item = function(event)
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29 local hash = event.item.attr.id;
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30 if not hash then return; end
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31 module:log("debug", "Received new hash: %s", hash);
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32 banned_hashes[hash] = true;
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33 end;
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34
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35 on_retract = function (event)
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36 local hash = event.item.attr.id;
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37 if not hash then return; end
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38 module:log("debug", "Retracted hash: %s", hash);
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39 banned_hashes[hash] = nil;
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40 end;
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41
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42 purge = function()
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43 module:log("debug", "Purge all hashes");
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44 for hash in pairs(banned_hashes) do
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45 banned_hashes[hash] = nil;
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46 end
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47 end;
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48 });
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49
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50 function request_list()
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51 local items_request = st.iq({ to = rtbl_service_jid, from = module.host, type = "get", id = "rtbl-request" })
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52 :tag("pubsub", { xmlns = "http://jabber.org/protocol/pubsub" })
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53 :tag("items", { node = rtbl_node }):up()
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54 :up();
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55
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56 module:send(items_request);
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57 end
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58
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59 function update_list(event)
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60 local from_jid = event.stanza.attr.from;
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61 if from_jid ~= rtbl_service_jid then
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62 module:log("debug", "Ignoring RTBL response from unknown sender");
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63 return;
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64 end
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65 local items_el = event.stanza:find("{http://jabber.org/protocol/pubsub}pubsub/items");
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66 if not items_el then
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67 module:log("warn", "Invalid items response from RTBL service");
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68 return;
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69 end
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70
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71 local old_entries = set.new(array.collect(it.keys(banned_hashes)));
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72
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73 local n_added, n_removed, n_total = 0, 0, 0;
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74 for item in items_el:childtags("item") do
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75 local hash = item.attr.id;
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76 if hash then
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77 n_total = n_total + 1;
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78 if not old_entries:contains(hash) then
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79 -- New entry
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80 n_added = n_added + 1;
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81 banned_hashes[hash] = true;
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82 else
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83 -- Entry already existed
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84 old_entries:remove(hash);
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85 end
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86 end
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87 end
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88
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89 -- Remove old entries that weren't in the received list
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90 for hash in old_entries do
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91 n_removed = n_removed + 1;
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92 banned_hashes[hash] = nil;
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93 end
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94
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95 module:log("info", "%d RTBL entries received from %s (%d added, %d removed)", n_total, from_jid, n_added, n_removed);
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96 return true;
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97 end
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98
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99 module:hook("iq-result/host/rtbl-request", update_list);
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100
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101 function update_hashes(occupant)
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102 local bare_hash, host_hash;
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103 if not occupant.mod_muc_rtbl_bare_hash then
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104 bare_hash = sha256(jid.bare(occupant.bare_jid), true);
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105 occupant.mod_muc_rtbl_bare_hash = bare_hash;
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106 else
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107 bare_hash = occupant.mod_muc_rtbl_bare_hash;
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108 end
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109 if not occupant.mod_muc_rtbl_host_hash then
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110 host_hash = sha256(jid.host(occupant.bare_jid), true);
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111 occupant.mod_muc_rtbl_host_hash = host_hash;
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112 else
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113 host_hash = occupant.mod_muc_rtbl_host_hash;
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114 end
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115 return bare_hash, host_hash
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116 end
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117
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118 module:hook("muc-occupant-pre-join", function (event)
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119 if next(banned_hashes) == nil then return end
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120
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121 local from_bare = jid.bare(event.stanza.attr.from);
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122
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123 local affiliation = event.room:get_affiliation(from_bare);
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124 if affiliation and affiliation ~= "none" then
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125 -- Skip check for affiliated users
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126 return;
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127 end
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128
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129 local bare_hash, host_hash = update_hashes(event.occupant);
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130 if banned_hashes[bare_hash] or banned_hashes[host_hash] then
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131 module:log("info", "Blocked user <%s> from room <%s> due to RTBL match", from_bare, event.stanza.attr.to);
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132 local error_reply = st.error_reply(event.stanza, "cancel", "forbidden", "You are banned from this service", event.room.jid);
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133 event.origin.send(error_reply);
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134 return true;
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parents:
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135 end
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parents:
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136 end);
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137
5173
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parents: 4813
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138 module:hook("muc-occupant-groupchat", function(event)
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parents: 5175
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139 local affiliation = event.room:get_affiliation(event.occupant.bare_jid);
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parents: 5175
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140 if affiliation and affiliation ~= "none" then
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parents: 5175
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141 -- Skip check for affiliated users
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parents: 5175
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142 return;
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Jonas Schäfer <jonas@wielicki.name>
parents: 5175
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143 end
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Jonas Schäfer <jonas@wielicki.name>
parents: 5175
diff changeset
144
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145 local bare_hash, host_hash = update_hashes(event.occupant);
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parents: 5173
diff changeset
146 if banned_hashes[bare_hash] or banned_hashes[host_hash] then
5173
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parents: 4813
diff changeset
147 module:log("debug", "Blocked message from user <%s> to room <%s> due to RTBL match", event.stanza.attr.from, event.stanza.attr.to);
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parents: 4813
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148 local error_reply = st.error_reply(event.stanza, "cancel", "forbidden", "You are banned from this service", event.room.jid);
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149 event.origin.send(error_reply);
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150 return true;
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parents: 4813
diff changeset
151 end
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parents: 4813
diff changeset
152 end);
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parents: 4813
diff changeset
153
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parents: 4813
diff changeset
154 module:hook("muc-private-message", function(event)
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parents: 4813
diff changeset
155 local occupant = event.room:get_occupant_by_nick(event.stanza.attr.from);
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parents: 5274
diff changeset
156 local affiliation = event.room:get_affiliation(occupant.bare_jid);
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parents: 5175
diff changeset
157 if affiliation and affiliation ~= "none" then
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parents: 5175
diff changeset
158 -- Skip check for affiliated users
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parents: 5175
diff changeset
159 return;
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Jonas Schäfer <jonas@wielicki.name>
parents: 5175
diff changeset
160 end
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Jonas Schäfer <jonas@wielicki.name>
parents: 5175
diff changeset
161
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parents: 5173
diff changeset
162 local bare_hash, host_hash = update_hashes(occupant);
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parents: 5173
diff changeset
163 if banned_hashes[bare_hash] or banned_hashes[host_hash] then
5173
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Jonas Schäfer <jonas@wielicki.name>
parents: 4813
diff changeset
164 module:log("debug", "Blocked private message from user <%s> from room <%s> due to RTBL match", occupant.bare_jid, event.stanza.attr.to);
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parents: 4813
diff changeset
165 local error_reply = st.error_reply(event.stanza, "cancel", "forbidden", "You are banned from this service", event.room.jid);
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parents: 4813
diff changeset
166 event.origin.send(error_reply);
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parents: 4813
diff changeset
167 return true;
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parents: 4813
diff changeset
168 end
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Jonas Schäfer <jonas@wielicki.name>
parents: 4813
diff changeset
169 end);
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parents: 4813
diff changeset
170
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parents: 4807
diff changeset
171 if prosody.start_time then
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Matthew Wild <mwild1@gmail.com>
parents: 4807
diff changeset
172 request_list();
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parents: 4807
diff changeset
173 else
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Matthew Wild <mwild1@gmail.com>
parents: 4808
diff changeset
174 module:hook_global("server-started", function ()
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Matthew Wild <mwild1@gmail.com>
parents: 4808
diff changeset
175 request_list();
9e9ec0f0b128 mod_muc_rtbl: Fix to hook server-started globally, to fetch entries at startup (thanks mirux)
Matthew Wild <mwild1@gmail.com>
parents: 4808
diff changeset
176 end);
4808
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Matthew Wild <mwild1@gmail.com>
parents: 4807
diff changeset
177 end