prosody
4c53e58d2468
plugins/mod_csi_simple.lua

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plugins/mod_csi_simple.lua @ 10302:4c53e58d2468

mod_csi_simple: Try not to flush buffer while already flushing it Reduces log noice
author Kim Alvefur <zash@zash.se>
date Sat, 05 Oct 2019 16:50:41 +0200
parent 10277:45a58127a3e5
child 10303:c434bff22b14
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 filters = require "util.filters";
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13
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14 local queue_size = module:get_option_number("csi_queue_size", 256);
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15
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16 module:hook("csi-is-stanza-important", function (event)
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17 local stanza = event.stanza;
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18 if not st.is_stanza(stanza) then
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19 return true;
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20 end
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21 local st_name = stanza.name;
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22 if not st_name then return false; end
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23 local st_type = stanza.attr.type;
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24 if st_name == "presence" then
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25 if st_type == nil or st_type == "unavailable" then
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26 return false;
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27 end
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28 return true;
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29 elseif st_name == "message" then
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30 if st_type == "headline" then
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31 return false;
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32 end
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33 if stanza:get_child("sent", "urn:xmpp:carbons:2") then
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34 return true;
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35 end
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36 local forwarded = stanza:find("{urn:xmpp:carbons:2}received/{urn:xmpp:forward:0}/{jabber:client}message");
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37 if forwarded then
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38 stanza = forwarded;
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39 end
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40 if stanza:get_child("body") then
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41 return true;
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42 end
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43 if stanza:get_child("subject") then
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44 return true;
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45 end
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46 if stanza:get_child("encryption", "urn:xmpp:eme:0") then
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47 return true;
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48 end
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49 return false;
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50 end
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51 return true;
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52 end, -1);
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53
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54 local function with_timestamp(stanza, from)
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55 if st.is_stanza(stanza) and stanza.attr.xmlns == nil and stanza.name ~= "iq" then
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56 stanza = st.clone(stanza);
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57 stanza:add_direct_child(st.stanza("delay", {xmlns = "urn:xmpp:delay", from = from, stamp = dt.datetime()}));
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58 end
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59 return stanza;
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60 end
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61
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62 local function manage_buffer(stanza, session)
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63 local ctr = session.csi_counter or 0;
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64 if ctr >= queue_size then
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65 session.log("debug", "Queue size limit hit, flushing buffer (queue size is %d)", session.csi_counter);
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66 session.conn:resume_writes();
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67 elseif module:fire_event("csi-is-stanza-important", { stanza = stanza, session = session }) then
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68 session.log("debug", "Important stanza, flushing buffer (queue size is %d)", session.csi_counter);
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69 session.conn:resume_writes();
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70 else
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71 stanza = with_timestamp(stanza, jid.join(session.username, session.host))
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72 end
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73 session.csi_counter = ctr + 1;
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74 return stanza;
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75 end
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76
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77 local function flush_buffer(data, session)
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78 if session.csi_flushing then
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79 return data;
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80 end
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81 session.csi_flushing = true;
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82 session.log("debug", "Client sent something, flushing buffer once (queue size is %d)", session.csi_counter);
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83 session.conn:resume_writes();
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84 return data;
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85 end
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86
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87 function enable_optimizations(session)
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88 if session.conn and session.conn.pause_writes then
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89 session.conn:pause_writes();
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90 filters.add_filter(session, "stanzas/out", manage_buffer);
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91 filters.add_filter(session, "bytes/in", flush_buffer);
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92 else
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93 session.log("warn", "Session connection does not support write pausing");
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94 end
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95 end
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96
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97 function disable_optimizations(session)
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98 if session.conn and session.conn.resume_writes then
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99 session.csi_flushing = nil;
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100 filters.remove_filter(session, "stanzas/out", manage_buffer);
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101 filters.remove_filter(session, "bytes/in", flush_buffer);
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102 session.conn:resume_writes();
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103 end
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104 end
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105
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106 module:hook("csi-client-inactive", function (event)
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107 local session = event.origin;
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108 enable_optimizations(session);
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109 end);
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110
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111 module:hook("csi-client-active", function (event)
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112 local session = event.origin;
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113 disable_optimizations(session);
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114 end);
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115
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116 module:hook("pre-resource-unbind", function (event)
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117 local session = event.session;
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118 disable_optimizations(session);
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119 end);
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120
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121 module:hook("c2s-ondrain", function (event)
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122 local session = event.session;
10277
45a58127a3e5 mod_csi_simple: Remove duplicated check for connection
Kim Alvefur <zash@zash.se>
parents: 10025
diff changeset
123 if session.state == "inactive" and session.conn and session.conn.pause_writes then
9923
e83dfcdeab59 mod_csi_simple: Include queue size in debug messages
Kim Alvefur <zash@zash.se>
parents: 9922
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124 session.conn:pause_writes();
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Kim Alvefur <zash@zash.se>
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125 session.log("debug", "Buffer flushed, resuming inactive mode (queue size was %d)", session.csi_counter);
9912
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126 session.csi_counter = 0;
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127 end
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parents: 9911
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128 end);
9919
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Kim Alvefur <zash@zash.se>
parents: 9918
diff changeset
129
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Kim Alvefur <zash@zash.se>
parents: 9918
diff changeset
130 function module.load()
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131 for _, user_session in pairs(prosody.hosts[module.host].sessions) do
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132 for _, session in pairs(user_session.sessions) do
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Kim Alvefur <zash@zash.se>
parents: 9918
diff changeset
133 if session.state == "inactive" then
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Kim Alvefur <zash@zash.se>
parents: 9918
diff changeset
134 enable_optimizations(session);
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135 end
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Kim Alvefur <zash@zash.se>
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136 end
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Kim Alvefur <zash@zash.se>
parents: 9918
diff changeset
137 end
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Kim Alvefur <zash@zash.se>
parents: 9918
diff changeset
138 end
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Kim Alvefur <zash@zash.se>
parents: 9918
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139
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Kim Alvefur <zash@zash.se>
parents: 9918
diff changeset
140 function module.unload()
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Kim Alvefur <zash@zash.se>
parents: 9918
diff changeset
141 for _, user_session in pairs(prosody.hosts[module.host].sessions) do
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Kim Alvefur <zash@zash.se>
parents: 9918
diff changeset
142 for _, session in pairs(user_session.sessions) do
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Kim Alvefur <zash@zash.se>
parents: 9918
diff changeset
143 if session.state == "inactive" then
9922
06bf5ccd859f mod_csi_simple: Fix type in function name
Matthew Wild <mwild1@gmail.com>
parents: 9921
diff changeset
144 disable_optimizations(session);
9919
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Kim Alvefur <zash@zash.se>
parents: 9918
diff changeset
145 end
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Kim Alvefur <zash@zash.se>
parents: 9918
diff changeset
146 end
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Kim Alvefur <zash@zash.se>
parents: 9918
diff changeset
147 end
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Kim Alvefur <zash@zash.se>
parents: 9918
diff changeset
148 end