Mercurial > prosody-modules
annotate mod_csi_battery_saver/mod_csi_battery_saver.lua @ 4813:0a257d1402c3
mod_muc_rtbl: Optimize case with zero hashes
On the assumption that during quiet times between torrents of spam,
the hash set would be empty. There would be no point in doing the
operations and hashes to check for a match in that case.
author | Kim Alvefur <zash@zash.se> |
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date | Mon, 06 Dec 2021 18:19:19 +0100 |
parents | 64b7daa6c42c |
children | 889e1695e935 |
rev | line source |
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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 local filter_muc = module:get_option_boolean("csi_battery_saver_filter_muc", false); |
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6 local queue_size = module:get_option_number("csi_battery_saver_queue_size", 256); |
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7 |
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8 module:depends"csi" |
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9 if filter_muc then module:depends"track_muc_joins"; end -- only depend on this module if we actually use it |
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10 local s_match = string.match; |
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11 local s_sub = string.sub; |
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12 local jid = require "util.jid"; |
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13 local new_queue = require "util.queue".new; |
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14 local datetime = require "util.datetime"; |
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15 local st = require "util.stanza"; |
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16 |
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17 local xmlns_delay = "urn:xmpp:delay"; |
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18 |
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19 -- a log id for this module instance |
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20 local id = s_sub(require "util.hashes".sha256(datetime.datetime(), true), 1, 4); |
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21 |
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22 |
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23 -- Returns a forwarded message, and either "in" or "out" depending on the direction |
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24 -- Returns nil if the message is not a carbon |
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25 local function extract_carbon(stanza) |
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26 local carbon = stanza:child_with_ns("urn:xmpp:carbons:2") or stanza:child_with_ns("urn:xmpp:carbons:1"); |
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27 if not carbon then return; end |
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28 local direction = carbon.name == "sent" and "out" or "in"; |
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29 local forward = carbon:get_child("forwarded", "urn:xmpp:forward:0"); |
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30 local message = forward and forward:child_with_name("message") or nil; |
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31 if not message then return; end |
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32 return message, direction; |
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33 end |
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34 |
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35 local function new_pump(session, output, ...) |
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36 -- luacheck: ignore 212/self |
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37 local q = new_queue(...); |
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38 local flush = true; |
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39 function q:pause() |
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40 flush = false; |
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41 end |
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42 function q:resume() |
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43 flush = true; |
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44 return q:flush(); |
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45 end |
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46 local push = q.push; |
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47 function q:push(item) |
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48 local ok = push(self, item); |
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49 if not ok then |
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50 session.log("debug", "mod_csi_battery_saver(%s): Queue full (%d items), forcing flush...", id, q:count()); |
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51 q:flush(); |
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52 output(item, self); |
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53 elseif flush then |
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54 return q:flush(); |
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55 end |
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56 return true; |
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57 end |
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58 function q:flush(alternative_output) |
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59 local out = alternative_output or output; |
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60 local item = self:pop(); |
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61 while item do |
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62 out(item, self); |
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63 item = self:pop(); |
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64 end |
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65 return true; |
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66 end |
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67 return q; |
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68 end |
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69 |
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70 local function is_stamp_needed(stanza, session) |
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71 local st_name = stanza and stanza.name or nil; |
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72 if st_name == "presence" then |
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73 return true; |
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74 elseif st_name == "message" then |
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75 if stanza:get_child("delay", xmlns_delay) then return false; end |
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76 if stanza.attr.type == "chat" or stanza.attr.type == "groupchat" then return true; end |
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77 end |
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78 return false; |
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79 end |
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80 |
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81 local function add_stamp(stanza, session) |
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82 local bare_jid = jid.bare(session.full_jid or session.host); |
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83 stanza = stanza:tag("delay", { xmlns = xmlns_delay, from = bare_jid, stamp = datetime.datetime()}); |
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84 return stanza; |
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85 end |
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86 |
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87 local function is_important(stanza, session) |
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88 local st_name = stanza and stanza.name or nil; |
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89 if not st_name then return true; end -- nonzas are always important |
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90 if st_name == "presence" then |
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91 -- TODO check for MUC status codes? |
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92 return false; |
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93 elseif st_name == "message" then |
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94 -- unpack carbon copies |
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95 local carbon, stanza_direction = extract_carbon(stanza); |
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96 --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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97 if carbon then stanza = carbon; end |
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98 |
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99 local st_type = stanza.attr.type; |
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100 |
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101 -- headline message are always not important |
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102 if st_type == "headline" then return false; end |
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103 |
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104 -- chat markers (XEP-0333) are important, too, because some clients use them to update their notifications |
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105 if stanza:child_with_ns("urn:xmpp:chat-markers:0") then return true; end; |
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106 |
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107 -- XEP-0353: Jingle Message Initiation incoming call messages |
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108 if stanza:child_with_ns("urn:xmpp:jingle-message:0") then return true; end |
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109 |
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110 -- carbon copied outgoing messages are important (some clients update their notifications upon receiving those) --> don't return false here |
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111 --if carbon and stanza_direction == "out" then return false; end |
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112 |
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113 -- We can't check for body contents in encrypted messages, so let's treat them as important |
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114 -- Some clients don't even set a body or an empty body for encrypted messages |
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115 |
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116 -- check omemo https://xmpp.org/extensions/inbox/omemo.html |
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117 if stanza:get_child("encrypted", "eu.siacs.conversations.axolotl") or stanza:get_child("encrypted", "urn:xmpp:omemo:0") then return true; end |
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118 |
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119 -- check xep27 pgp https://xmpp.org/extensions/xep-0027.html |
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120 if stanza:get_child("x", "jabber:x:encrypted") then return true; end |
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121 |
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122 -- check xep373 pgp (OX) https://xmpp.org/extensions/xep-0373.html |
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123 if stanza:get_child("openpgp", "urn:xmpp:openpgp:0") then return true; end |
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124 |
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125 -- check eme |
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126 if stanza:get_child("encryption", "urn:xmpp:eme:0") then return true; end |
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127 |
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128 local body = stanza:get_child_text("body"); |
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129 if st_type == "groupchat" then |
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130 if stanza:get_child_text("subject") then return true; end |
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131 if body == nil or body == "" then return false; end |
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132 -- body contains text, let's see if we want to process it further |
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133 if not filter_muc then -- default case |
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134 local stanza_important = module:fire_event("csi-is-stanza-important", { stanza = stanza, session = session }); |
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135 if stanza_important ~= nil then return stanza_important; end |
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136 return true; -- deemed unknown/high priority by mod_csi_muc_priorities or some other module |
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137 else |
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138 if body:find(session.username, 1, true) then return true; end |
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139 local rooms = session.rooms_joined; |
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140 if not rooms then return false; end |
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141 local room_nick = rooms[jid.bare(stanza_direction == "in" and stanza.attr.from or stanza.attr.to)]; |
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142 if room_nick and body:find(room_nick, 1, true) then return true; end |
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143 return false; |
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144 end |
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145 end |
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146 return body ~= nil and body ~= ""; |
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147 end |
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148 return true; |
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149 end |
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150 |
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151 module:hook("csi-client-inactive", function (event) |
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152 local session = event.origin; |
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153 if not session.resource then |
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154 session.log("warn", "Ignoring csi if no resource is bound!"); |
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155 return; |
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156 end |
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157 if session.pump then |
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158 session.log("debug", "mod_csi_battery_saver(%s): Client is inactive, buffering unimportant outgoing stanzas", id); |
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159 session.pump:pause(); |
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160 else |
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161 session.log("debug", "mod_csi_battery_saver(%s): Client is inactive the first time, initializing module for this session", id); |
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162 local pump = new_pump(session, session.send, queue_size); |
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163 pump:pause(); |
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164 session.pump = pump; |
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165 session._pump_orig_send = session.send; |
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166 function session.send(stanza) |
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167 session.log("debug", "mod_csi_battery_saver(%s): Got outgoing stanza: <%s>", id, tostring(stanza.name or stanza)); |
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168 local important = is_important(stanza, session); |
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169 -- clone stanzas before adding delay stamp and putting them into the queue |
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170 if st.is_stanza(stanza) then stanza = st.clone(stanza); end |
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171 -- add delay stamp to unimportant (buffered) stanzas that can/need be stamped |
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172 if not important and is_stamp_needed(stanza, session) then stanza = add_stamp(stanza, session); end |
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173 -- add stanza to outgoing queue and flush the buffer if needed |
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174 pump:push(stanza); |
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175 if important then |
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176 session.log("debug", "mod_csi_battery_saver(%s): Encountered important stanza, flushing buffer: <%s>", id, tostring(stanza.name or stanza)); |
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177 pump:flush(); |
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178 end |
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179 return true; |
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180 end |
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181 end |
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182 end); |
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183 |
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184 module:hook("csi-client-active", function (event) |
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185 local session = event.origin; |
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186 if not session.resource then |
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187 session.log("warn", "Ignoring csi if no resource is bound!"); |
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188 return; |
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189 end |
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190 if session.pump then |
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191 session.log("debug", "mod_csi_battery_saver(%s): Client is active, resuming direct delivery", id); |
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192 session.pump:resume(); |
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193 end |
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194 end); |
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195 |
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196 -- clean up this session on hibernation end |
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197 -- but don't change resumed.send(), it is already overwritten with session.send() by the smacks module |
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198 module:hook("smacks-hibernation-end", function (event) |
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199 local session = event.resumed; |
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200 if session.pump then |
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201 session.log("debug", "mod_csi_battery_saver(%s): Hibernation ended, flushing buffer and afterwards disabling for this session", id); |
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202 session.pump:flush(session.send); -- use the fresh session.send() introduced by the smacks resume |
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203 -- don't reset session.send() because this is not the send previously overwritten by this module, but a fresh one |
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204 -- session.send = session._pump_orig_send; |
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205 session.pump = nil; |
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206 session._pump_orig_send = nil; |
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207 end |
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208 end, 1000); -- high priority to prevent message reordering on resumption (we want to flush our buffers *first*) |
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209 |
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210 function module.unload() |
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211 module:log("info", "%s: Unloading module, flushing all buffers", id); |
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212 local host_sessions = prosody.hosts[module.host].sessions; |
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213 for _, user in pairs(host_sessions) do |
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214 for _, session in pairs(user.sessions) do |
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215 if session.pump then |
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216 session.log("debug", "mod_csi_battery_saver(%s): Flushing buffer and restoring to original session.send()", id); |
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217 session.pump:flush(); |
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218 session.send = session._pump_orig_send; |
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219 session.pump = nil; |
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220 session._pump_orig_send = nil; |
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221 end |
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222 end |
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223 end |
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224 end |
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225 |
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226 module:log("info", "%s: Successfully loaded module", id); |