prosody
c434bff22b14
plugins/mod_csi_simple.lua

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plugins/mod_csi_simple.lua @ 10303:c434bff22b14

mod_csi_simple: Always remove session filters when disabling CSI Only guard the actual pausing of outgoing data on the method existing. This prevents the filters from lingering in case something happened to the connection. Removing already removed filters should be a safe noop.
author Kim Alvefur <zash@zash.se>
date Sat, 05 Oct 2019 16:55:58 +0200
parent 10302:4c53e58d2468
child 10414:51ebfdeccad7
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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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 session.csi_flushing = nil;
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99 filters.remove_filter(session, "stanzas/out", manage_buffer);
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100 filters.remove_filter(session, "bytes/in", flush_buffer);
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101 if session.conn and session.conn.resume_writes then
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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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Kim Alvefur <zash@zash.se>
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120
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Kim Alvefur <zash@zash.se>
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121 module:hook("c2s-ondrain", function (event)
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Kim Alvefur <zash@zash.se>
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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
diff changeset
124 session.conn:pause_writes();
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Kim Alvefur <zash@zash.se>
parents: 9922
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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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parents: 9911
diff changeset
126 session.csi_counter = 0;
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parents: 9911
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127 end
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Kim Alvefur <zash@zash.se>
parents: 9911
diff changeset
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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Kim Alvefur <zash@zash.se>
parents: 9918
diff changeset
131 for _, user_session in pairs(prosody.hosts[module.host].sessions) do
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parents: 9918
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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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parents: 9918
diff changeset
135 end
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Kim Alvefur <zash@zash.se>
parents: 9918
diff changeset
136 end
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Kim Alvefur <zash@zash.se>
parents: 9918
diff changeset
137 end
d602a495409b mod_csi_simple: Disable optimizations on unload and re-enable on load
Kim Alvefur <zash@zash.se>
parents: 9918
diff changeset
138 end
d602a495409b mod_csi_simple: Disable optimizations on unload and re-enable on load
Kim Alvefur <zash@zash.se>
parents: 9918
diff changeset
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
d602a495409b mod_csi_simple: Disable optimizations on unload and re-enable on load
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
d602a495409b mod_csi_simple: Disable optimizations on unload and re-enable on load
Kim Alvefur <zash@zash.se>
parents: 9918
diff changeset
146 end
d602a495409b mod_csi_simple: Disable optimizations on unload and re-enable on load
Kim Alvefur <zash@zash.se>
parents: 9918
diff changeset
147 end
d602a495409b mod_csi_simple: Disable optimizations on unload and re-enable on load
Kim Alvefur <zash@zash.se>
parents: 9918
diff changeset
148 end