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annotate mod_http_stats_stream/mod_http_stats_stream.lua @ 3571:f5ea0b886c7c

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mod_storage_xmlarchive: Limit search to smallest time range in case of inexact match This should improve performance in case the exact days in the 'start' and 'end' range are missing from the index.
author Kim Alvefur <zash@zash.se>
date Fri, 03 May 2019 18:59:38 +0200
parents 47a6f01231b2
children fd054689a64c
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47a6f01231b2 mod_http_stats_stream: Sends statistics from statsmanager over an HTTP event stream
Kim Alvefur <zash@zash.se>
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1 local statsman = require "core.statsmanager";
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2 local json = require "util.json";
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3
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4 local sessions = {};
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5
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6 local function updates_client_closed(response)
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7 module:log("debug", "Streamstats client closed");
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8 sessions[response] = nil;
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9 end
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10
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11 local function get_updates(event)
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12 local request, response = event.request, event.response;
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13
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14 response.on_destroy = updates_client_closed;
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15
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16 response.conn:write(table.concat({
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17 "HTTP/1.1 200 OK";
47a6f01231b2 mod_http_stats_stream: Sends statistics from statsmanager over an HTTP event stream
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18 "Content-Type: text/event-stream";
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19 "X-Accel-Buffering: no"; -- For nginx maybe?
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20 "";
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21 "event: stats-full";
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22 "data: "..json.encode(statsman.get_stats());
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23 "";
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24 "";
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25 }, "\r\n"));
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26
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27 sessions[response] = request;
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28 return true;
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29 end
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31
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32 module:hook_global("stats-updated", function (event)
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33 local data = table.concat({
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34 "event: stats-updated";
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35 "data: "..json.encode(event.changed_stats);
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36 "";
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37 "";
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38 }, "\r\n")
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39 for response in pairs(sessions) do
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40 response.conn:write(data);
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41 end
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42 end);
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43
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44
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45 module:depends("http");
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46 module:provides("http", {
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47 route = {
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48 GET = get_updates;
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49 }
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50 });