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annotate mod_debug_traceback/mod_debug_traceback.lua @ 5585:5b316088bef5

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mod_rest: Use logger of HTTP request in trunk In Prosody trunk rev c975dafa4303 each HTTP request gained its own log sink, to make it easy to log things related to each request and group those messages. Especially where async is used, spreading the request and response apart as mod_rest does with iq stanzas, this grouped logging should help find related messages.
author Kim Alvefur <zash@zash.se>
date Fri, 07 Jul 2023 00:10:37 +0200
parents 02292b892fce
children 0358fcf14cd6
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1 module:set_global();
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2
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3 local traceback = require "util.debug".traceback;
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4 local pposix = require "util.pposix";
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5 local os_date = os.date;
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6 local render_filename = require "util.interpolation".new("%b{}", function (s) return s; end, {
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7 yyyymmdd = function (t)
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8 return os_date("%Y%m%d", t);
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9 end;
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10 hhmmss = function (t)
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11 return os_date("%H%M%S", t);
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12 end;
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13 });
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14
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15 local count = 0;
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16
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17 local function get_filename(filename_template)
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18 filename_template = filename_template;
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19 return render_filename(filename_template, {
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20 paths = prosody.paths;
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21 pid = pposix.getpid();
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22 count = count;
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23 time = os.time();
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24 });
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25 end
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26
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27 local default_filename_template = "{paths.data}/traceback-{pid}-{count}.log";
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28 local filename_template = module:get_option_string("debug_traceback_filename", default_filename_template);
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29 local signal_name = module:get_option_string("debug_traceback_signal", "SIGUSR1");
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30
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31 function dump_traceback()
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32 module:log("info", "Received %s, writing traceback", signal_name);
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33
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34 local tb = traceback();
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35 module:fire_event("debug_traceback/triggered", { traceback = tb });
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36
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37 local f, err = io.open(get_filename(filename_template), "a+");
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38 if not f then
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39 module:log("error", "Unable to write traceback: %s", err);
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40 return;
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41 end
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42 f:write("-- Traceback generated at ", os.date("%b %d %H:%M:%S"), " --\n");
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43 f:write(tb, "\n");
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44 f:write("-- End of traceback --\n");
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45 f:close();
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46 count = count + 1;
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47 end
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48
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49 local mod_posix = module:depends("posix");
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50 if rawget(mod_posix, "features") and mod_posix.features.signal_events then
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51 module:hook("signal/"..signal_name, dump_traceback);
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52 else
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53 require"util.signal".signal(signal_name, dump_traceback);
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54 end