prosody
b92afa0a4119
plugins/mod_csi_simple.lua

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plugins/mod_csi_simple.lua @ 10807:b92afa0a4119

mod_csi_simple: Add short reasons to report Should improve quality of debug logs
author Kim Alvefur <zash@zash.se>
date Thu, 07 May 2020 22:56:30 +0200
parent 10806:24e2b571d29a
child 10808:0d365c0ee9fe
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 -- Copyright (C) 2016-2020 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 local important_payloads = module:get_option_set("csi_important_payloads", { });
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17
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18 function is_important(stanza) --> boolean, reason: string
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19 if not st.is_stanza(stanza) then
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20 -- whitespace pings etc
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21 return true;
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22 end
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23 if stanza.attr.xmlns ~= nil then
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24 -- stream errors, stream management etc
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25 return true, "nonza";
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26 end
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27 local st_name = stanza.name;
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28 if not st_name then return false; end
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29 local st_type = stanza.attr.type;
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30 if st_name == "presence" then
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31 if st_type == nil or st_type == "unavailable" or st_name == "error" then
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32 return false, "presence update";
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33 end
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34 -- TODO Some MUC awareness, e.g. check for the 'this relates to you' status code
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35 return true, "subscription request";
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36 elseif st_name == "message" then
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37 if st_type == "headline" then
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38 -- Headline messages are ephemeral by definition
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39 return false, "headline";
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40 end
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41 if st_type == "error" then
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42 return true, "delivery failure";
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43 end
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44 if stanza:get_child("sent", "urn:xmpp:carbons:2") then
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45 return true, "carbon";
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46 end
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47 local forwarded = stanza:find("{urn:xmpp:carbons:2}received/{urn:xmpp:forward:0}/{jabber:client}message");
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48 if forwarded then
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49 stanza = forwarded;
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50 end
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51 if stanza:get_child("body") then
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52 return true, "body";
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53 end
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54 if stanza:get_child("subject") then
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55 -- Last step of a MUC join
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56 return true, "subject";
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57 end
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58 if stanza:get_child("encryption", "urn:xmpp:eme:0") then
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59 -- Since we can't know what an encrypted message contains, we assume it's important
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60 -- XXX Experimental XEP
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61 return true, "encrypted";
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62 end
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63 if stanza:get_child("x", "jabber:x:conference") or stanza:find("{http://jabber.org/protocol/muc#user}x/invite") then
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64 return true, "invite";
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65 end
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66 for important in important_payloads do
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67 if stanza:find(important) then
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68 return true;
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69 end
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70 end
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71 return false;
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72 elseif st_name == "iq" then
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73 return true;
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74 end
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75 end
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76
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77 module:hook("csi-is-stanza-important", function (event)
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78 local important, why = is_important(event.stanza);
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79 event.reason = why;
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80 return important;
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81 end, -1);
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82
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83 local function should_flush(stanza, session, ctr) --> boolean, reason: string
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84 if ctr >= queue_size then
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85 return true, "queue size limit reached";
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86 end
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87 local event = { stanza = stanza, session = session };
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88 local ret = module:fire_event("csi-is-stanza-important", event)
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89 return ret, event.reason;
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90 end
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91
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92 local function with_timestamp(stanza, from)
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93 if st.is_stanza(stanza) and stanza.attr.xmlns == nil and stanza.name ~= "iq" then
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94 stanza = st.clone(stanza);
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95 stanza:add_direct_child(st.stanza("delay", {xmlns = "urn:xmpp:delay", from = from, stamp = dt.datetime()}));
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96 end
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97 return stanza;
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98 end
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99
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100 local function manage_buffer(stanza, session)
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101 local ctr = session.csi_counter or 0;
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102 local flush, why = should_flush(stanza, session, ctr);
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103 if flush then
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104 session.log("debug", "Flushing buffer (%s; queue size is %d)", why or "important", session.csi_counter);
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105 session.conn:resume_writes();
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106 else
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107 stanza = with_timestamp(stanza, jid.join(session.username, session.host))
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108 end
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109 session.csi_counter = ctr + 1;
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110 return stanza;
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111 end
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112
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113 local function flush_buffer(data, session)
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114 if session.csi_flushing then
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115 return data;
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116 end
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117 session.csi_flushing = true;
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118 session.log("debug", "Client sent something, flushing buffer once (queue size is %d)", session.csi_counter);
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119 session.conn:resume_writes();
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120 return data;
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121 end
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diff changeset
122
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123 function enable_optimizations(session)
10277
45a58127a3e5 mod_csi_simple: Remove duplicated check for connection
Kim Alvefur <zash@zash.se>
parents: 10025
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124 if session.conn and session.conn.pause_writes then
9909
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parents: 9771
diff changeset
125 session.conn:pause_writes();
9912
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126 filters.add_filter(session, "stanzas/out", manage_buffer);
9913
7d78b24d8449 mod_csi_simple: Trigger buffer flush on seeing incoming data
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parents: 9912
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127 filters.add_filter(session, "bytes/in", flush_buffer);
9589
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Kim Alvefur <zash@zash.se>
parents:
diff changeset
128 else
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Kim Alvefur <zash@zash.se>
parents: 9914
diff changeset
129 session.log("warn", "Session connection does not support write pausing");
9589
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Kim Alvefur <zash@zash.se>
parents:
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130 end
9918
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parents: 9917
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131 end
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parents:
diff changeset
132
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Matthew Wild <mwild1@gmail.com>
parents: 9921
diff changeset
133 function disable_optimizations(session)
10303
c434bff22b14 mod_csi_simple: Always remove session filters when disabling CSI
Kim Alvefur <zash@zash.se>
parents: 10302
diff changeset
134 session.csi_flushing = nil;
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Kim Alvefur <zash@zash.se>
parents: 10302
diff changeset
135 filters.remove_filter(session, "stanzas/out", manage_buffer);
c434bff22b14 mod_csi_simple: Always remove session filters when disabling CSI
Kim Alvefur <zash@zash.se>
parents: 10302
diff changeset
136 filters.remove_filter(session, "bytes/in", flush_buffer);
10277
45a58127a3e5 mod_csi_simple: Remove duplicated check for connection
Kim Alvefur <zash@zash.se>
parents: 10025
diff changeset
137 if session.conn and session.conn.resume_writes then
9909
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Kim Alvefur <zash@zash.se>
parents: 9771
diff changeset
138 session.conn:resume_writes();
9589
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Kim Alvefur <zash@zash.se>
parents:
diff changeset
139 end
9918
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parents: 9917
diff changeset
140 end
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parents: 9917
diff changeset
141
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diff changeset
142 module:hook("csi-client-inactive", function (event)
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143 local session = event.origin;
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parents: 9917
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144 enable_optimizations(session);
6e9dcec259d0 mod_csi_simple: Separate out functions to enable/disable optimizations
Kim Alvefur <zash@zash.se>
parents: 9917
diff changeset
145 end);
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parents: 9917
diff changeset
146
6e9dcec259d0 mod_csi_simple: Separate out functions to enable/disable optimizations
Kim Alvefur <zash@zash.se>
parents: 9917
diff changeset
147 module:hook("csi-client-active", function (event)
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Kim Alvefur <zash@zash.se>
parents: 9917
diff changeset
148 local session = event.origin;
9922
06bf5ccd859f mod_csi_simple: Fix type in function name
Matthew Wild <mwild1@gmail.com>
parents: 9921
diff changeset
149 disable_optimizations(session);
9589
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Kim Alvefur <zash@zash.se>
parents:
diff changeset
150 end);
aeb054ee88c5 mod_csi_simple: Import modified version of mod_csi_pump from prosody-modules
Kim Alvefur <zash@zash.se>
parents:
diff changeset
151
10025
4498f601516d mod_csi_simple: Disable optimizations on disconnect (fixes #1358)
Kim Alvefur <zash@zash.se>
parents: 9923
diff changeset
152 module:hook("pre-resource-unbind", function (event)
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Kim Alvefur <zash@zash.se>
parents: 9923
diff changeset
153 local session = event.session;
4498f601516d mod_csi_simple: Disable optimizations on disconnect (fixes #1358)
Kim Alvefur <zash@zash.se>
parents: 9923
diff changeset
154 disable_optimizations(session);
10414
51ebfdeccad7 mod_csi_simple: Make sure to disable optimizations before mod_smacks (thanks pep.)
Kim Alvefur <zash@zash.se>
parents: 10303
diff changeset
155 end, 1);
9912
601f9781a605 mod_csi_simple: Count buffered items and flush when it reaches configured limit
Kim Alvefur <zash@zash.se>
parents: 9911
diff changeset
156
601f9781a605 mod_csi_simple: Count buffered items and flush when it reaches configured limit
Kim Alvefur <zash@zash.se>
parents: 9911
diff changeset
157 module:hook("c2s-ondrain", function (event)
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Kim Alvefur <zash@zash.se>
parents: 9911
diff changeset
158 local session = event.session;
10277
45a58127a3e5 mod_csi_simple: Remove duplicated check for connection
Kim Alvefur <zash@zash.se>
parents: 10025
diff changeset
159 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
160 session.conn:pause_writes();
e83dfcdeab59 mod_csi_simple: Include queue size in debug messages
Kim Alvefur <zash@zash.se>
parents: 9922
diff changeset
161 session.log("debug", "Buffer flushed, resuming inactive mode (queue size was %d)", session.csi_counter);
9912
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Kim Alvefur <zash@zash.se>
parents: 9911
diff changeset
162 session.csi_counter = 0;
601f9781a605 mod_csi_simple: Count buffered items and flush when it reaches configured limit
Kim Alvefur <zash@zash.se>
parents: 9911
diff changeset
163 end
601f9781a605 mod_csi_simple: Count buffered items and flush when it reaches configured limit
Kim Alvefur <zash@zash.se>
parents: 9911
diff changeset
164 end);
9919
d602a495409b mod_csi_simple: Disable optimizations on unload and re-enable on load
Kim Alvefur <zash@zash.se>
parents: 9918
diff changeset
165
d602a495409b mod_csi_simple: Disable optimizations on unload and re-enable on load
Kim Alvefur <zash@zash.se>
parents: 9918
diff changeset
166 function module.load()
d602a495409b mod_csi_simple: Disable optimizations on unload and re-enable on load
Kim Alvefur <zash@zash.se>
parents: 9918
diff changeset
167 for _, user_session in pairs(prosody.hosts[module.host].sessions) do
d602a495409b mod_csi_simple: Disable optimizations on unload and re-enable on load
Kim Alvefur <zash@zash.se>
parents: 9918
diff changeset
168 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
169 if session.state == "inactive" then
d602a495409b mod_csi_simple: Disable optimizations on unload and re-enable on load
Kim Alvefur <zash@zash.se>
parents: 9918
diff changeset
170 enable_optimizations(session);
d602a495409b mod_csi_simple: Disable optimizations on unload and re-enable on load
Kim Alvefur <zash@zash.se>
parents: 9918
diff changeset
171 end
d602a495409b mod_csi_simple: Disable optimizations on unload and re-enable on load
Kim Alvefur <zash@zash.se>
parents: 9918
diff changeset
172 end
d602a495409b mod_csi_simple: Disable optimizations on unload and re-enable on load
Kim Alvefur <zash@zash.se>
parents: 9918
diff changeset
173 end
d602a495409b mod_csi_simple: Disable optimizations on unload and re-enable on load
Kim Alvefur <zash@zash.se>
parents: 9918
diff changeset
174 end
d602a495409b mod_csi_simple: Disable optimizations on unload and re-enable on load
Kim Alvefur <zash@zash.se>
parents: 9918
diff changeset
175
d602a495409b mod_csi_simple: Disable optimizations on unload and re-enable on load
Kim Alvefur <zash@zash.se>
parents: 9918
diff changeset
176 function module.unload()
d602a495409b mod_csi_simple: Disable optimizations on unload and re-enable on load
Kim Alvefur <zash@zash.se>
parents: 9918
diff changeset
177 for _, user_session in pairs(prosody.hosts[module.host].sessions) do
d602a495409b mod_csi_simple: Disable optimizations on unload and re-enable on load
Kim Alvefur <zash@zash.se>
parents: 9918
diff changeset
178 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
179 if session.state == "inactive" then
9922
06bf5ccd859f mod_csi_simple: Fix type in function name
Matthew Wild <mwild1@gmail.com>
parents: 9921
diff changeset
180 disable_optimizations(session);
9919
d602a495409b mod_csi_simple: Disable optimizations on unload and re-enable on load
Kim Alvefur <zash@zash.se>
parents: 9918
diff changeset
181 end
d602a495409b mod_csi_simple: Disable optimizations on unload and re-enable on load
Kim Alvefur <zash@zash.se>
parents: 9918
diff changeset
182 end
d602a495409b mod_csi_simple: Disable optimizations on unload and re-enable on load
Kim Alvefur <zash@zash.se>
parents: 9918
diff changeset
183 end
d602a495409b mod_csi_simple: Disable optimizations on unload and re-enable on load
Kim Alvefur <zash@zash.se>
parents: 9918
diff changeset
184 end