prosody
008a7097fdc5
plugins/mod_debug_stanzas/watcher.lib.lua

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plugins/mod_debug_stanzas/watcher.lib.lua @ 12705:008a7097fdc5

util.jwt: Provide built-in token expiry support (defaults to 3600s lifetime) To avoid every user of the library needing to add and verify expiry info, this is now handled by util.jwt itself (if not overridden or disabled). Issuing tokens that are valid forever is bad practice and rarely desired, and the default token lifetime is now 3600s (1 hour).
author Matthew Wild <mwild1@gmail.com>
date Mon, 11 Jul 2022 13:28:29 +0100
parent 12463:788048158982
child 12977:74b9e05af71e
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1 local filters = require "util.filters";
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2 local jid = require "util.jid";
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3 local set = require "util.set";
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4
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5 local client_watchers = {};
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6
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7 -- active_filters[session] = {
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8 -- filter_func = filter_func;
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9 -- downstream = { cb1, cb2, ... };
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10 -- }
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11 local active_filters = {};
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12
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13 local function subscribe_session_stanzas(session, handler, reason)
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14 if active_filters[session] then
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15 table.insert(active_filters[session].downstream, handler);
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16 if reason then
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17 handler(reason, nil, session);
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18 end
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19 return;
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20 end
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21 local downstream = { handler };
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22 active_filters[session] = {
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23 filter_in = function (stanza)
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24 module:log("debug", "NOTIFY WATCHER %d", #downstream);
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25 for i = 1, #downstream do
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26 downstream[i]("received", stanza, session);
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27 end
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28 return stanza;
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29 end;
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30 filter_out = function (stanza)
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31 module:log("debug", "NOTIFY WATCHER %d", #downstream);
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32 for i = 1, #downstream do
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33 downstream[i]("sent", stanza, session);
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34 end
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35 return stanza;
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36 end;
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37 downstream = downstream;
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38 };
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39 filters.add_filter(session, "stanzas/in", active_filters[session].filter_in);
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40 filters.add_filter(session, "stanzas/out", active_filters[session].filter_out);
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41 if reason then
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42 handler(reason, nil, session);
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43 end
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44 end
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45
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46 local function unsubscribe_session_stanzas(session, handler, reason)
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47 local active_filter = active_filters[session];
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48 if not active_filter then
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49 return;
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50 end
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51 for i = #active_filter.downstream, 1, -1 do
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52 if active_filter.downstream[i] == handler then
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53 table.remove(active_filter.downstream, i);
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54 if reason then
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55 handler(reason, nil, session);
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56 end
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57 end
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58 end
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59 if #active_filter.downstream == 0 then
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60 filters.remove_filter(session, "stanzas/in", active_filter.filter_in);
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61 filters.remove_filter(session, "stanzas/out", active_filter.filter_out);
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62 end
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63 active_filters[session] = nil;
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64 end
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65
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66 local function unsubscribe_all_from_session(session, reason)
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67 local active_filter = active_filters[session];
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68 if not active_filter then
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69 return;
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70 end
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71 for i = #active_filter.downstream, 1, -1 do
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72 local handler = table.remove(active_filter.downstream, i);
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73 if reason then
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74 handler(reason, nil, session);
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75 end
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76 end
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77 filters.remove_filter(session, "stanzas/in", active_filter.filter_in);
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78 filters.remove_filter(session, "stanzas/out", active_filter.filter_out);
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79 active_filters[session] = nil;
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80 end
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81
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82 local function unsubscribe_handler_from_all(handler, reason)
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83 for session in pairs(active_filters) do
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84 unsubscribe_session_stanzas(session, handler, reason);
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85 end
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86 end
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87
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88 local s2s_watchers = {};
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89
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90 module:hook("s2sin-established", function (event)
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91 for _, watcher in ipairs(s2s_watchers) do
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92 if watcher.target_spec == event.session.from_host then
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93 subscribe_session_stanzas(event.session, watcher.handler, "opened");
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94 end
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95 end
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96 end);
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97
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98 module:hook("s2sout-established", function (event)
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99 for _, watcher in ipairs(s2s_watchers) do
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100 if watcher.target_spec == event.session.to_host then
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101 subscribe_session_stanzas(event.session, watcher.handler, "opened");
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102 end
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103 end
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104 end);
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105
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106 module:hook("s2s-closed", function (event)
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107 unsubscribe_all_from_session(event.session, "closed");
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108 end);
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109
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110 local watched_hosts = set.new();
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111
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112 local handler_map = setmetatable({}, { __mode = "kv" });
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113
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114 local function add_stanza_watcher(spec, orig_handler)
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115 local function filtering_handler(event_type, stanza, session)
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116 if stanza and spec.filter_spec then
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117 if spec.filter_spec.with_jid then
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118 if event_type == "sent" and (not stanza.attr.from or not jid.compare(stanza.attr.from, spec.filter_spec.with_jid)) then
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119 return;
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120 elseif event_type == "received" and (not stanza.attr.to or not jid.compare(stanza.attr.to, spec.filter_spec.with_jid)) then
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121 return;
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122 end
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123 end
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124 end
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125 return orig_handler(event_type, stanza, session);
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126 end
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127 handler_map[orig_handler] = filtering_handler;
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128 if spec.target_spec.jid then
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129 local target_is_remote_host = not jid.node(spec.target_spec.jid) and not prosody.hosts[spec.target_spec.jid];
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130
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131 if target_is_remote_host then
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132 -- Watch s2s sessions
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133 table.insert(s2s_watchers, {
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134 target_spec = spec.target_spec.jid;
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135 handler = filtering_handler;
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136 orig_handler = orig_handler;
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137 });
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138
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139 -- Scan existing s2sin for matches
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140 for session in pairs(prosody.incoming_s2s) do
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141 if spec.target_spec.jid == session.from_host then
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142 subscribe_session_stanzas(session, filtering_handler, "attached");
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143 end
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144 end
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145 -- Scan existing s2sout for matches
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146 for local_host, local_session in pairs(prosody.hosts) do --luacheck: ignore 213/local_host
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147 for remote_host, remote_session in pairs(local_session.s2sout) do
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148 if spec.target_spec.jid == remote_host then
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149 subscribe_session_stanzas(remote_session, filtering_handler, "attached");
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150 end
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151 end
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152 end
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153 else
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154 table.insert(client_watchers, {
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155 target_spec = spec.target_spec.jid;
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156 handler = filtering_handler;
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157 orig_handler = orig_handler;
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158 });
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159 local host = jid.host(spec.target_spec.jid);
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160 if not watched_hosts:contains(host) and prosody.hosts[host] then
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161 module:context(host):hook("resource-bind", function (event)
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162 for _, watcher in ipairs(client_watchers) do
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163 module:log("debug", "NEW CLIENT: %s vs %s", event.session.full_jid, watcher.target_spec);
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164 if jid.compare(event.session.full_jid, watcher.target_spec) then
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165 module:log("debug", "MATCH");
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166 subscribe_session_stanzas(event.session, watcher.handler, "opened");
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167 else
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168 module:log("debug", "NO MATCH");
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169 end
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170 end
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171 end);
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172
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173 module:context(host):hook("resource-unbind", function (event)
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174 unsubscribe_all_from_session(event.session, "closed");
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175 end);
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176
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177 watched_hosts:add(host);
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178 end
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179 for full_jid, session in pairs(prosody.full_sessions) do
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180 if jid.compare(full_jid, spec.target_spec.jid) then
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181 subscribe_session_stanzas(session, filtering_handler, "attached");
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182 end
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183 end
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184 end
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185 else
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186 error("No recognized target selector");
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187 end
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188 end
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189
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190 local function remove_stanza_watcher(orig_handler)
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191 local handler = handler_map[orig_handler];
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192 unsubscribe_handler_from_all(handler, "detached");
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193 handler_map[orig_handler] = nil;
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194
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195 for i = #client_watchers, 1, -1 do
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196 if client_watchers[i].orig_handler == orig_handler then
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197 table.remove(client_watchers, i);
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198 end
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199 end
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200
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201 for i = #s2s_watchers, 1, -1 do
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202 if s2s_watchers[i].orig_handler == orig_handler then
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203 table.remove(s2s_watchers, i);
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204 end
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205 end
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206 end
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207
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208 local function cleanup(reason)
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209 client_watchers = {};
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210 s2s_watchers = {};
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diff changeset
211 for session in pairs(active_filters) do
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parents:
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212 unsubscribe_all_from_session(session, reason or "cancelled");
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213 end
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214 end
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215
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216 return {
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217 add = add_stanza_watcher;
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218 remove = remove_stanza_watcher;
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diff changeset
219 cleanup = cleanup;
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diff changeset
220 };