Mercurial > prosody-modules
annotate mod_csi_battery_saver/mod_csi_battery_saver.lua @ 5593:6d0574bfbf5d
mod_client_management: Include software version in table (when known)
Showing software versions could be useful for statistical reasons, e.g.
determining how quickly (or not) users upgrade, but most importantly for
revoking vulnerable clients versions in case of a security issue.
author | Kim Alvefur <zash@zash.se> |
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date | Thu, 13 Jul 2023 23:26:02 +0200 |
parents | 889e1695e935 |
children | f6a2602129c8 |
rev | line source |
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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 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 if stanza:child_with_ns("urn:xmpp:jingle-message:1") then return true; end |
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110 |
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111 -- carbon copied outgoing messages are important (some clients update their notifications upon receiving those) --> don't return false here |
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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 -- We can't check for body contents in encrypted messages, so let's treat them as important |
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115 -- Some clients don't even set a body or an empty body for encrypted messages |
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116 |
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117 -- check omemo https://xmpp.org/extensions/inbox/omemo.html |
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118 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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119 |
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120 -- check xep27 pgp https://xmpp.org/extensions/xep-0027.html |
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121 if stanza:get_child("x", "jabber:x:encrypted") then return true; end |
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122 |
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123 -- check xep373 pgp (OX) https://xmpp.org/extensions/xep-0373.html |
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124 if stanza:get_child("openpgp", "urn:xmpp:openpgp:0") then return true; end |
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125 |
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126 -- check eme |
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127 if stanza:get_child("encryption", "urn:xmpp:eme:0") then return true; end |
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128 |
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129 local body = stanza:get_child_text("body"); |
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130 if st_type == "groupchat" then |
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131 if stanza:get_child_text("subject") then return true; end |
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132 if body == nil or body == "" then return false; end |
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133 -- body contains text, let's see if we want to process it further |
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134 if not filter_muc then -- default case |
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135 local stanza_important = module:fire_event("csi-is-stanza-important", { stanza = stanza, session = session }); |
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136 if stanza_important ~= nil then return stanza_important; end |
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137 return true; -- deemed unknown/high priority by mod_csi_muc_priorities or some other module |
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138 else |
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139 if body:find(session.username, 1, true) then return true; end |
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140 local rooms = session.rooms_joined; |
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141 if not rooms then return false; end |
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142 local room_nick = rooms[jid.bare(stanza_direction == "in" and stanza.attr.from or stanza.attr.to)]; |
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143 if room_nick and body:find(room_nick, 1, true) then return true; end |
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144 return false; |
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145 end |
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146 end |
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147 return body ~= nil and body ~= ""; |
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148 end |
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149 return true; |
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150 end |
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151 |
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152 module:hook("csi-client-inactive", function (event) |
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153 local session = event.origin; |
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154 if not session.resource then |
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155 session.log("warn", "Ignoring csi if no resource is bound!"); |
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156 return; |
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157 end |
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158 if session.pump then |
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159 session.log("debug", "mod_csi_battery_saver(%s): Client is inactive, buffering unimportant outgoing stanzas", id); |
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160 session.pump:pause(); |
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161 else |
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162 session.log("debug", "mod_csi_battery_saver(%s): Client is inactive the first time, initializing module for this session", id); |
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163 local pump = new_pump(session, session.send, queue_size); |
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164 pump:pause(); |
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165 session.pump = pump; |
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166 session._pump_orig_send = session.send; |
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167 function session.send(stanza) |
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168 session.log("debug", "mod_csi_battery_saver(%s): Got outgoing stanza: <%s>", id, tostring(stanza.name or stanza)); |
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169 local important = is_important(stanza, session); |
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170 -- clone stanzas before adding delay stamp and putting them into the queue |
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171 if st.is_stanza(stanza) then stanza = st.clone(stanza); end |
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172 -- add delay stamp to unimportant (buffered) stanzas that can/need be stamped |
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173 if not important and is_stamp_needed(stanza, session) then stanza = add_stamp(stanza, session); end |
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174 -- add stanza to outgoing queue and flush the buffer if needed |
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175 pump:push(stanza); |
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176 if important then |
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177 session.log("debug", "mod_csi_battery_saver(%s): Encountered important stanza, flushing buffer: <%s>", id, tostring(stanza.name or stanza)); |
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178 pump:flush(); |
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179 end |
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180 return true; |
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181 end |
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182 end |
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183 end); |
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184 |
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185 module:hook("csi-client-active", function (event) |
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186 local session = event.origin; |
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187 if not session.resource then |
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188 session.log("warn", "Ignoring csi if no resource is bound!"); |
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189 return; |
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190 end |
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191 if session.pump then |
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192 session.log("debug", "mod_csi_battery_saver(%s): Client is active, resuming direct delivery", id); |
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193 session.pump:resume(); |
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194 end |
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195 end); |
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196 |
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197 -- clean up this session on hibernation end |
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198 -- but don't change resumed.send(), it is already overwritten with session.send() by the smacks module |
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199 module:hook("smacks-hibernation-end", function (event) |
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200 local session = event.resumed; |
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201 if session.pump then |
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202 session.log("debug", "mod_csi_battery_saver(%s): Hibernation ended, flushing buffer and afterwards disabling for this session", id); |
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203 session.pump:flush(session.send); -- use the fresh session.send() introduced by the smacks resume |
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204 -- don't reset session.send() because this is not the send previously overwritten by this module, but a fresh one |
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205 -- session.send = session._pump_orig_send; |
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206 session.pump = nil; |
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207 session._pump_orig_send = nil; |
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208 end |
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209 end, 1000); -- high priority to prevent message reordering on resumption (we want to flush our buffers *first*) |
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210 |
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211 function module.unload() |
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212 module:log("info", "%s: Unloading module, flushing all buffers", id); |
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213 local host_sessions = prosody.hosts[module.host].sessions; |
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214 for _, user in pairs(host_sessions) do |
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215 for _, session in pairs(user.sessions) do |
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216 if session.pump then |
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217 session.log("debug", "mod_csi_battery_saver(%s): Flushing buffer and restoring to original session.send()", id); |
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218 session.pump:flush(); |
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219 session.send = session._pump_orig_send; |
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220 session.pump = nil; |
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221 session._pump_orig_send = nil; |
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222 end |
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223 end |
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224 end |
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225 end |
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226 |
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227 module:log("info", "%s: Successfully loaded module", id); |