Mercurial > prosody-modules
annotate mod_debug_traceback/mod_debug_traceback.lua @ 4249:64aa1d9d70ac
mod_rest: Catch and log errors in callback promise chain
From the code it looks like it should be possible to reply to an error
stanza, but it did not. Turns out I was saved by my local developer mode
module which throws errors if an attempt is made to create an errror
reply to an error stanza. However nothing collects this error from the
promise, so all I got was confusion.
author | Kim Alvefur <zash@zash.se> |
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date | Sun, 15 Nov 2020 16:25:49 +0100 |
parents | 02292b892fce |
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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 |