Mercurial > prosody-modules
annotate mod_csi_battery_saver/mod_csi_battery_saver.lua @ 2651:2b741e68433b
mod_http_upload: Use correct function for base64
author | Kim Alvefur <zash@zash.se> |
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date | Tue, 28 Mar 2017 17:09:39 +0200 |
parents | 538c54d2dab3 |
children | b5fae17e4403 |
rev | line source |
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2606
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mod_csi_battery_saver: CSI module to save battery on mobile devices, based on mod_csi_pump
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1 -- Copyright (C) 2016 Kim Alvefur |
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2 -- Copyright (C) 2017 Thilo Molitor |
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3 -- |
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4 |
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5 module:depends"csi" |
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6 module:depends"track_muc_joins" |
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7 local s_match = string.match; |
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8 local s_sub = string.sub; |
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9 local jid = require "util.jid"; |
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10 local new_queue = require "util.queue".new; |
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11 local datetime = require "util.datetime"; |
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12 |
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13 local xmlns_delay = "urn:xmpp:delay"; |
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14 |
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15 -- a log id for this module instance |
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16 local id = s_sub(require "util.hashes".sha256(datetime.datetime(), true), 1, 4); |
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17 |
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18 -- Patched version of util.stanza:find() that supports giving stanza names |
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19 -- without their namespace, allowing for every namespace. |
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20 local function find(self, path) |
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21 local pos = 1; |
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22 local len = #path + 1; |
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23 |
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24 repeat |
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25 local xmlns, name, text; |
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26 local char = s_sub(path, pos, pos); |
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27 if char == "@" then |
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28 return self.attr[s_sub(path, pos + 1)]; |
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29 elseif char == "{" then |
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30 xmlns, pos = s_match(path, "^([^}]+)}()", pos + 1); |
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31 end |
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32 name, text, pos = s_match(path, "^([^@/#]*)([/#]?)()", pos); |
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33 name = name ~= "" and name or nil; |
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34 if pos == len then |
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35 if text == "#" then |
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36 local child = xmlns ~= nil and self:get_child(name, xmlns) or self:child_with_name(name); |
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37 return child and child:get_text() or nil; |
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38 end |
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39 return xmlns ~= nil and self:get_child(name, xmlns) or self:child_with_name(name); |
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40 end |
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41 self = xmlns ~= nil and self:get_child(name, xmlns) or self:child_with_name(name); |
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42 until not self |
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43 return nil; |
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44 end |
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45 |
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46 local function new_pump(output, ...) |
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47 -- luacheck: ignore 212/self |
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48 local q = new_queue(...); |
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49 local flush = true; |
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50 function q:pause() |
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51 flush = false; |
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52 end |
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53 function q:resume() |
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54 flush = true; |
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55 return q:flush(); |
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56 end |
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57 local push = q.push; |
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58 function q:push(item) |
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59 local ok = push(self, item); |
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60 if not ok then |
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61 q:flush(); |
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62 output(item, self); |
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63 elseif flush then |
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64 return q:flush(); |
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65 end |
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66 return true; |
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67 end |
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68 function q:flush() |
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69 local item = self:pop(); |
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70 while item do |
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71 output(item, self); |
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72 item = self:pop(); |
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73 end |
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74 return true; |
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75 end |
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76 return q; |
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77 end |
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78 |
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79 local function is_stamp_needed(stanza, session) |
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80 local st_name = stanza and stanza.name or nil; |
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81 if st_name == "presence" then |
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82 return true; |
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83 elseif st_name == "message" then |
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84 if stanza:get_child("delay", xmlns_delay) then return false; end |
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85 if stanza.attr.type == "chat" or stanza.attr.type == "groupchat" then return true; end |
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86 end |
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87 return false; |
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88 end |
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89 |
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90 local function add_stamp(stanza, session) |
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91 stanza = stanza:tag("delay", { xmlns = xmlns_delay, from = session.host, stamp = datetime.datetime()}); |
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92 return stanza; |
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93 end |
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94 |
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95 local function is_important(stanza, session) |
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96 local st_name = stanza and stanza.name or nil; |
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97 if not st_name then return false; end |
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98 if st_name == "presence" then |
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99 -- TODO check for MUC status codes? |
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100 return false; |
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101 elseif st_name == "message" then |
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102 -- unpack carbon copies |
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103 local stanza_direction = "in"; |
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104 local carbon; |
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105 -- support carbon copied message stanzas having an arbitrary message-namespace or no message-namespace at all |
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106 if not carbon then carbon = find(stanza, "{urn:xmpp:carbons:2}/forwarded/message"); end |
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107 if not carbon then carbon = find(stanza, "{urn:xmpp:carbons:1}/forwarded/message"); end |
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108 stanza_direction = carbon and stanza:child_with_name("sent") and "out" or "in"; |
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109 --session.log("debug", "mod_csi_battery_saver(%s): stanza_direction = %s, carbon = %s, stanza = %s", id, stanza_direction, carbon and "true" or "false", tostring(stanza)); |
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110 if carbon then stanza = carbon; end |
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111 -- carbon copied outgoing messages aren't important (but incoming carbon copies are!) |
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112 if carbon and stanza_direction == "out" then return false; end |
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113 |
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114 local st_type = stanza.attr.type; |
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115 if st_type == "headline" then |
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116 return false; |
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117 end |
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118 local body = stanza:get_child_text("body"); |
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119 if st_type == "groupchat" then |
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120 if stanza:get_child_text("subject") then return true; end |
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121 if not body then return false; end |
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122 if body:find(session.username, 1, true) then return true; end |
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123 local rooms = session.rooms_joined; |
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124 if not rooms then return false; end |
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125 local room_nick = rooms[jid.bare(stanza_direction == "in" and stanza.attr.from or stanza.attr.to)]; |
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126 if room_nick and body:find(room_nick, 1, true) then return true; end |
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127 return false; |
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128 end |
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129 return body ~= nil and body ~= ""; |
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130 end |
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131 return true; |
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132 end |
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133 |
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134 module:hook("csi-client-inactive", function (event) |
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135 local session = event.origin; |
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136 if session.pump then |
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137 session.pump:pause(); |
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138 else |
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139 session.log("debug", "mod_csi_battery_saver(%s): Client is inactive the first time, initializing module for this session", id); |
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140 local pump = new_pump(session.send, 100); |
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141 pump:pause(); |
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142 session.pump = pump; |
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143 session._pump_orig_send = session.send; |
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144 function session.send(stanza) |
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145 session.log("debug", "mod_csi_battery_saver(%s): Got stanza: <%s>", id, tostring(stanza.name)); |
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146 local important = is_important(stanza, session); |
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147 -- add delay stamp to unimported (buffered) stanzas that can/need be stamped |
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148 if not important and is_stamp_needed(stanza, session) then stanza = add_stamp(stanza, session); end |
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149 pump:push(stanza); |
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150 if important then |
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151 session.log("debug", "mod_csi_battery_saver(%s): Encountered important stanza, flushing buffer: <%s>", id, tostring(stanza.name)); |
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152 pump:flush(); |
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153 end |
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154 return true; |
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155 end |
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156 end |
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157 session.log("debug", "mod_csi_battery_saver(%s): Client is inactive, buffering unimportant stanzas", id); |
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158 end); |
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159 |
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160 module:hook("csi-client-active", function (event) |
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161 local session = event.origin; |
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162 if session.pump then |
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163 session.log("debug", "mod_csi_battery_saver(%s): Client is active, resuming direct delivery", id); |
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164 session.pump:resume(); |
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165 end |
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166 end); |
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167 |
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168 function module.unload() |
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169 module:log("info", "%s: Unloading module, flushing all buffers", id); |
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170 local host_sessions = prosody.hosts[module.host].sessions; |
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171 for _, user in pairs(host_sessions) do |
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172 for _, session in pairs(user.sessions) do |
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173 if session.pump then |
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174 session.pump:flush(); |
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175 session.send = session._pump_orig_send; |
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176 session.pump = nil; |
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177 session._pump_orig_send = nil; |
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178 end |
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179 end |
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180 end |
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181 end |
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182 |
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183 module:log("info", "%s: Successfully loaded module", id); |