prosody
9c4dc1e6d2c9
util/logger.lua

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util/logger.lua @ 13107:9c4dc1e6d2c9

mod_http: Add way to retrieve internal URL instead of external This could be of help when configuring reverse proxies, as it is the internal URL the proxy must point at. Argument treated as an enum "internal" "external"(default) to allow for future extensibility.
author Kim Alvefur <zash@zash.se>
date Wed, 24 May 2023 14:43:45 +0200
parent 12975:d10957394a3c
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1 -- Prosody IM
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2 -- Copyright (C) 2008-2010 Matthew Wild
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3 -- Copyright (C) 2008-2010 Waqas Hussain
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4 --
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b1885732e979 GPL->MIT!
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5 -- This project is MIT/X11 licensed. Please see the
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6 -- COPYING file in the source package for more information.
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7 --
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8 -- luacheck: ignore 213/level
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9
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10 local pairs = pairs;
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11 local ipairs = ipairs;
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12 local require = require;
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13 local t_remove = table.remove;
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15 local _ENV = nil;
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16 -- luacheck: std none
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17
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18 local level_sinks = {};
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19
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20 local make_logger;
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21
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22 local function init(name)
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23 local log_debug = make_logger(name, "debug");
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24 local log_info = make_logger(name, "info");
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25 local log_warn = make_logger(name, "warn");
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26 local log_error = make_logger(name, "error");
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27
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28 return function (level, message, ...)
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29 if level == "debug" then
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30 return log_debug(message, ...);
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31 elseif level == "info" then
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32 return log_info(message, ...);
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33 elseif level == "warn" then
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34 return log_warn(message, ...);
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35 elseif level == "error" then
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36 return log_error(message, ...);
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37 end
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38 end
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39 end
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40
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41 function make_logger(source_name, level)
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42 local level_handlers = level_sinks[level];
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43 if not level_handlers then
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44 level_handlers = {};
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45 level_sinks[level] = level_handlers;
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46 end
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48 local logger = function (message, ...)
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49 for i = 1,#level_handlers do
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50 level_handlers[i](source_name, level, message, ...);
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51 end
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52 end
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53
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54 return logger;
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55 end
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56
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57 local function reset()
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58 for level, handler_list in pairs(level_sinks) do
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59 -- Clear all handlers for this level
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60 for i = 1, #handler_list do
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61 handler_list[i] = nil;
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62 end
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63 end
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64 end
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65
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66 local function add_level_sink(level, sink_function)
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67 if not level_sinks[level] then
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68 level_sinks[level] = { sink_function };
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69 else
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70 level_sinks[level][#level_sinks[level] + 1 ] = sink_function;
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71 end
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72 end
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73
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74 local function add_simple_sink(simple_sink_function, levels)
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75 local format = require "prosody.util.format".format;
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76 local function sink_function(name, level, msg, ...)
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77 return simple_sink_function(name, level, format(msg, ...));
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78 end
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79 for _, level in ipairs(levels or {"debug", "info", "warn", "error"}) do
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80 add_level_sink(level, sink_function);
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81 end
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82 return sink_function;
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83 end
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84
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85 local function remove_sink(sink_function)
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86 local removed;
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87 for level, sinks in pairs(level_sinks) do
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88 for i = #sinks, 1, -1 do
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89 if sinks[i] == sink_function then
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90 t_remove(sinks, i);
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91 removed = true;
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92 end
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93 end
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94 end
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95 return removed;
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96 end
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97
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98 return {
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99 init = init;
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100 make_logger = make_logger;
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101 reset = reset;
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102 add_level_sink = add_level_sink;
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103 add_simple_sink = add_simple_sink;
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104 new = make_logger;
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105 remove_sink = remove_sink;
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106 };