Mercurial > prosody-modules

annotate mod_http_stats_stream/mod_http_stats_stream.lua @ 4542:fb4a50bf60f1

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mod_prometheus: Invoke stats collection if in 'manual' mode Since 10d13e0554f9 a special value for statistics_interval "manual" exists, where a module is expected to invoke processing in connection to collection of stats. This makes internal collection and exporting to Prometheus happens at the same time with no chance of timers getting out of sync.
author Kim Alvefur <zash@zash.se>
date Tue, 13 Apr 2021 23:53:53 +0200
parents 740870196b97
children bac3dae031ee
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1 module:set_global();
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2
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3 local statsman = require "core.statsmanager";
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4 local http = require "net.http.server";
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5 local json = require "util.json";
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6
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7 local sessions = {};
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8
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9 local function updates_client_closed(response)
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10 module:log("debug", "Streamstats client closed");
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11 sessions[response] = nil;
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12 end
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14 local function get_updates(event)
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15 local request, response = event.request, event.response;
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16
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17 response.on_destroy = updates_client_closed;
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18
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19 response.headers.content_type = "text/event-stream";
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20 response.headers.x_accel_buffering = "no"; -- for nginx maybe?
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21 local resp = http.prepare_header(response);
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22 table.insert(resp, "event: stats-full\r\n");
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23 table.insert(resp, "data: ");
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24 table.insert(resp, json.encode(statsman.get_stats()));
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25 table.insert(resp, "\r\n\r\n");
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26 response.conn:write(table.concat(resp));
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27
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28 sessions[response] = request;
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29 return true;
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30 end
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32
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33 module:hook("stats-updated", function (event)
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34 local data = table.concat({
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35 "event: stats-updated";
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36 "data: "..json.encode(event.changed_stats);
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37 "";
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38 "";
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39 }, "\r\n")
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40 for response in pairs(sessions) do
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41 response.conn:write(data);
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42 end
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43 end);
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44
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45
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46 module:depends("http");
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47 module:provides("http", {
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48 route = {
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49 GET = get_updates;
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50 }
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51 });