annotate mod_stanza_counter/mod_stanza_counter_http.lua @ 4877:adc6241e5d16

mod_measure_process: Report the enforced limit The soft limit is what the kernel actually enforces, while the hard limit is is how far you can change the soft limit without privileges. Unless the process dynamically adjusts the soft limit, knowing the hard limit is not as useful as knowing the soft limit. Reporting the soft limit and the number of in-use FDs allows placing alerts on expressions like 'process_open_fds / process_max_fds >= 0.95'
author Kim Alvefur <zash@zash.se>
date Tue, 18 Jan 2022 18:55:20 +0100
parents 7dbde05b48a9
children
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1 -- (C) 2011, Marco Cirillo (LW.Org)
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2 -- Exposes stats on HTTP for the stanza counter module.
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4 module:depends("http")
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6 local base_path = module:get_option_string("stanza_counter_basepath", "/stanza-counter/")
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8 -- http handlers
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10 local r_200 = "\n<html>\n<head>\n<title>Prosody's Stanza Counter</title>\n<meta name=\"robots\" content=\"noindex, nofollow\" />\n</head>\n\n<body>\n<h3>Incoming and Outgoing stanzas divided per type</h3>\n<p><strong>Incoming IQs</strong>: %d<br/>\n<strong>Outgoing IQs</strong>: %d<br/>\n<strong>Incoming Messages</strong>: %d<br/>\n<strong>Outgoing Messages</strong>: %d<br/>\n<strong>Incoming Presences</strong>: %d<br/>\n<strong>Outgoing Presences</strong>: %d<p>\n</body>\n\n</html>\n"
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12 local r_err = "\n<html>\n<head>\n<title>Prosody's Stanza Counter - Error %s</title>\n<meta name=\"robots\" content=\"noindex, nofollow\" />\n</head>\n\n<body>\n<h3>%s</h3>\n</body>\n\n</html>\n"
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14 local function res(event, code, body, extras)
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15 local response = event.response
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17 if extras then
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18 for header, data in pairs(extras) do response.headers[header] = data end
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19 end
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21 response.status_code = code
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22 response:send(body)
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23 end
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25 local function req(event)
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26 if not prosody.stanza_counter then
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27 local err500 = r_err:format(event, 500, "Stats not found, is the counter module loaded?")
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28 return res(500, err500) end
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29 if method == "GET" then
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30 local forge_res = r_200:format(prosody.stanza_counter.iq["incoming"],
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31 prosody.stanza_counter.iq["outgoing"],
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32 prosody.stanza_counter.message["incoming"],
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33 prosody.stanza_counter.message["outgoing"],
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34 prosody.stanza_counter.presence["incoming"],
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35 prosody.stanza_counter.presence["outgoing"])
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36 return res(event, 200, forge_res)
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37 else
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38 local err405 = r_err:format(405, "Only GET is supported")
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39 return res(event, 405, err405, {["Allow"] = "GET"})
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40 end
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41 end
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43 -- initialization.
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45 module:provides("http", {
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46 default_path = base_path,
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47 route = {
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48 ["GET /"] = req,
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49 ["POST /"] = req
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50 }
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51 })