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annotate mod_pinger/mod_pinger.lua @ 4776:13e913471b75

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mod_http_admin_api: Ensure freshness of metrics when in manual mode When in manual collection mode, as recommended for Prometheus, collection needs to be triggered manually, or they would be stale, possibly dating from the start of the server. This might vary per metric depending on how and when the metrics are gathered.
author Kim Alvefur <zash@zash.se>
date Thu, 18 Nov 2021 19:26:07 +0100
parents 8298b06e6603
children
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1 local new_watchdog = require "util.watchdog".new;
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2 local filters = require "util.filters";
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3 local st = require "util.stanza";
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4
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5 local idle_timeout = module:get_option_number("c2s_idle_timeout", 300);
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6 local ping_timeout = module:get_option_number("c2s_ping_timeout", 30);
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8 function update_watchdog(data, session)
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9 if session.idle_watchdog then
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10 session.idle_watchdog:reset();
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11 session.idle_pinged = nil;
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12 end
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13 return data;
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14 end
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16 function check_session(watchdog)
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17 local session = watchdog.session;
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18 if session.smacks then
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19 unwatch_session(session);
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20 return;
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21 end
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22 if not session.idle_pinged then
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23 session.idle_pinged = true;
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24 session.send(st.iq({ type = "get", from = module.host, id = "idle-check" })
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25 :tag("ping", { xmlns = "urn:xmpp:ping" }));
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26 return ping_timeout; -- Call us again after ping_timeout
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27 else
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28 module:log("info", "Client %q silent for too long, closing...", session.full_jid);
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29 session:close("connection-timeout");
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30 end
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31 end
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34 function watch_session(session)
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35 if not session.idle_watchdog
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36 and not session.requests then -- Don't watch BOSH connections (BOSH already has timeouts)
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37 session.idle_watchdog = new_watchdog(idle_timeout, check_session);
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38 session.idle_watchdog.session = session;
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39 filters.add_filter(session, "bytes/in", update_watchdog);
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40 end
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41 end
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43 function unwatch_session(session)
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44 if session.idle_watchdog then
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45 filters.remove_filter(session, "bytes/in", update_watchdog);
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46 session.idle_watchdog:cancel();
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47 session.idle_watchdog = nil;
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48 end
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49 end
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51 module:hook("resource-bind", function (event) watch_session(event.session); end);
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52 module:hook("resource-unbind", function (event) unwatch_session(event.session); end);