prosody
2c6b7247c3d9
plugins/mod_csi_simple.lua

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plugins/mod_csi_simple.lua @ 9914:2c6b7247c3d9

mod_csi_simple: Also flush buffer in "pump" mode
author Kim Alvefur <zash@zash.se>
date Sun, 24 Mar 2019 19:02:40 +0100
parent 9913:7d78b24d8449
child 9917:45b5528b128a
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 -- Copyright (C) 2016-2018 Kim Alvefur
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2 --
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3 -- This project is MIT/X11 licensed. Please see the
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4 -- COPYING file in the source package for more information.
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5 --
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6
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7 module:depends"csi"
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8
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9 local jid = require "util.jid";
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10 local st = require "util.stanza";
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11 local dt = require "util.datetime";
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12 local new_queue = require "util.queue".new;
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13 local filters = require "util.filters";
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14
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15 local function new_pump(output, ...)
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16 -- luacheck: ignore 212/self
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17 local q = new_queue(...);
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18 local flush = true;
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19 function q:pause()
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20 flush = false;
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21 end
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22 function q:resume()
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23 flush = true;
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24 return q:flush();
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25 end
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26 local push = q.push;
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27 function q:push(item)
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28 local ok = push(self, item);
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29 if not ok then
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30 q:flush();
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31 output(item, self);
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32 elseif flush then
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33 return q:flush();
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34 end
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35 return true;
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36 end
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37 function q:flush()
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38 local item = self:pop();
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39 while item do
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40 output(item, self);
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41 item = self:pop();
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42 end
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43 return true;
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44 end
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45 return q;
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46 end
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47
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48 local queue_size = module:get_option_number("csi_queue_size", 256);
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49
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50 module:hook("csi-is-stanza-important", function (event)
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51 local stanza = event.stanza;
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52 if not st.is_stanza(stanza) then
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53 return true;
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54 end
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55 local st_name = stanza.name;
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56 if not st_name then return false; end
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57 local st_type = stanza.attr.type;
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58 if st_name == "presence" then
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59 if st_type == nil or st_type == "unavailable" then
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60 return false;
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61 end
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62 return true;
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63 elseif st_name == "message" then
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64 if st_type == "headline" then
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65 return false;
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66 end
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67 if stanza:get_child("sent", "urn:xmpp:carbons:2") then
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68 return true;
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69 end
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70 local forwarded = stanza:find("{urn:xmpp:carbons:2}received/{urn:xmpp:forward:0}/{jabber:client}message");
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71 if forwarded then
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72 stanza = forwarded;
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73 end
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74 if stanza:get_child("body") then
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75 return true;
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76 end
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77 if stanza:get_child("subject") then
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78 return true;
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79 end
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80 if stanza:get_child("encryption", "urn:xmpp:eme:0") then
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81 return true;
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82 end
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83 return false;
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84 end
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85 return true;
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86 end, -1);
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87
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88 local function with_timestamp(stanza, from)
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89 if st.is_stanza(stanza) and stanza.attr.xmlns == nil and stanza.name ~= "iq" then
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90 stanza = st.clone(stanza);
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91 stanza:add_direct_child(st.stanza("delay", {xmlns = "urn:xmpp:delay", from = from, stamp = dt.datetime()}));
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92 end
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93 return stanza;
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94 end
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95
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96 local function manage_buffer(stanza, session)
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97 local ctr = session.csi_counter or 0;
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98 if ctr >= queue_size or module:fire_event("csi-is-stanza-important", { stanza = stanza, session = session }) then
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99 session.conn:resume_writes();
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100 else
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101 stanza = with_timestamp(stanza, jid.join(session.username, session.host))
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102 end
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103 session.csi_counter = ctr + 1;
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104 return stanza;
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105 end
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106
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107 local function flush_buffer(data, session)
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108 session.conn:resume_writes();
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109 return data;
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110 end
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111
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112 local function flush_pump(data, session)
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113 session.pump:flush();
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114 return data;
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115 end
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116
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117 module:hook("csi-client-inactive", function (event)
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118 local session = event.origin;
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119 if session.conn and session.conn and session.conn.pause_writes then
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120 session.log("info", "Native net.server buffer management mode");
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121 session.conn:pause_writes();
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122 filters.add_filter(session, "stanzas/out", manage_buffer);
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123 filters.add_filter(session, "bytes/in", flush_buffer);
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124 elseif session.pump then
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125 session.pump:pause();
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126 else
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127 local bare_jid = jid.join(session.username, session.host);
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128 local send = session.send;
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129 session._orig_send = send;
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130 local pump = new_pump(session.send, queue_size);
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131 pump:pause();
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132 session.pump = pump;
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133 filters.add_filter(session, "bytes/in", flush_pump);
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134 function session.send(stanza)
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135 if session.state == "active" or module:fire_event("csi-is-stanza-important", { stanza = stanza, session = session }) then
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136 pump:flush();
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137 send(stanza);
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138 else
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139 pump:push(with_timestamp(stanza, bare_jid));
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140 end
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141 return true;
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142 end
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143 end
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144 end);
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145
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146 module:hook("csi-client-active", function (event)
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147 local session = event.origin;
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148 if session.pump then
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149 session.pump:resume();
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150 elseif session.conn and session.conn and session.conn.resume_writes then
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diff changeset
151 filters.remove_filter(session, "stanzas/out", manage_buffer);
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152 filters.remove_filter(session, "bytes/in", flush_buffer);
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diff changeset
153 session.conn:resume_writes();
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154 end
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155 end);
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156
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157
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158 module:hook("c2s-ondrain", function (event)
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159 local session = event.session;
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160 if session.state == "inactive" and session.conn and session.conn and session.conn.pause_writes then
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161 session.csi_counter = 0;
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162 session.conn:pause_writes();
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163 end
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164 end);