prosody
9a8b716fda14
core/loggingmanager.lua

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core/loggingmanager.lua @ 3438:9a8b716fda14

loggingmanager: Remove (redundant!) dependency on eventmanager
author Matthew Wild <mwild1@gmail.com>
date Tue, 03 Aug 2010 10:59:47 +0100
parent 3358:b5a812cf698c
child 3514:fdae08713c67
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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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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
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9
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10 local format, rep = string.format, string.rep;
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11 local pcall = pcall;
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12 local debug = debug;
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13 local tostring, setmetatable, rawset, pairs, ipairs, type =
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14 tostring, setmetatable, rawset, pairs, ipairs, type;
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15 local io_open, io_write = io.open, io.write;
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16 local math_max, rep = math.max, string.rep;
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17 local os_date, os_getenv = os.date, os.getenv;
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18 local getstyle, getstring = require "util.termcolours".getstyle, require "util.termcolours".getstring;
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19
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20 if os.getenv("__FLUSH_LOG") then
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21 local io_flush = io.flush;
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22 local _io_write = io_write;
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23 io_write = function(...) _io_write(...); io_flush(); end
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24 end
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25
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26 local config = require "core.configmanager";
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27 local logger = require "util.logger";
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28 local prosody = prosody;
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30 local debug_mode = config.get("*", "core", "debug");
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32 _G.log = logger.init("general");
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33
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34 module "loggingmanager"
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35
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36 -- The log config used if none specified in the config file (see reload_logging for initialization)
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37 local default_logging;
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38 local default_file_logging;
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39 local default_timestamp = "%b %d %H:%M:%S";
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40 -- The actual config loggingmanager is using
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41 local logging_config;
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43 local apply_sink_rules;
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44 local log_sink_types = setmetatable({}, { __newindex = function (t, k, v) rawset(t, k, v); apply_sink_rules(k); end; });
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45 local get_levels;
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46 local logging_levels = { "debug", "info", "warn", "error", "critical" }
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48 -- Put a rule into action. Requires that the sink type has already been registered.
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49 -- This function is called automatically when a new sink type is added [see apply_sink_rules()]
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50 local function add_rule(sink_config)
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51 local sink_maker = log_sink_types[sink_config.to];
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52 if sink_maker then
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53 if sink_config.levels and not sink_config.source then
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54 -- Create sink
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55 local sink = sink_maker(sink_config);
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56
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57 -- Set sink for all chosen levels
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58 for level in pairs(get_levels(sink_config.levels)) do
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59 logger.add_level_sink(level, sink);
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60 end
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61 elseif sink_config.source and not sink_config.levels then
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62 logger.add_name_sink(sink_config.source, sink_maker(sink_config));
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63 elseif sink_config.source and sink_config.levels then
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64 local levels = get_levels(sink_config.levels);
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65 local sink = sink_maker(sink_config);
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66 logger.add_name_sink(sink_config.source,
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67 function (name, level, ...)
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68 if levels[level] then
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69 return sink(name, level, ...);
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70 end
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71 end);
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72 else
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73 -- All sources
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74 -- Create sink
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75 local sink = sink_maker(sink_config);
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76
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77 -- Set sink for all levels
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78 for _, level in pairs(logging_levels) do
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79 logger.add_level_sink(level, sink);
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80 end
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81 end
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82 else
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83 -- No such sink type
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84 end
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85 end
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86
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87 -- Search for all rules using a particular sink type, and apply
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88 -- them. Called automatically when a new sink type is added to
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89 -- the log_sink_types table.
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90 function apply_sink_rules(sink_type)
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91 if type(logging_config) == "table" then
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92 for _, sink_config in pairs(logging_config) do
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93 if sink_config.to == sink_type then
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94 add_rule(sink_config);
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95 end
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96 end
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97 elseif type(logging_config) == "string" and (not logging_config:match("^%*")) and sink_type == "file" then
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98 -- User specified simply a filename, and the "file" sink type
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99 -- was just added
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100 for _, sink_config in pairs(default_file_logging) do
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101 sink_config.filename = logging_config;
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102 add_rule(sink_config);
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103 sink_config.filename = nil;
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104 end
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105 elseif type(logging_config) == "string" and logging_config:match("^%*(.+)") == sink_type then
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106 -- Log all levels (debug+) to this sink
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107 add_rule({ levels = { min = "debug" }, to = sink_type });
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108 end
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109 end
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110
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112
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113 --- Helper function to get a set of levels given a "criteria" table
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114 function get_levels(criteria, set)
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115 set = set or {};
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116 if type(criteria) == "string" then
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117 set[criteria] = true;
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118 return set;
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119 end
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120 local min, max = criteria.min, criteria.max;
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121 if min or max then
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122 local in_range;
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123 for _, level in ipairs(logging_levels) do
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124 if min == level then
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125 set[level] = true;
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126 in_range = true;
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127 elseif max == level then
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128 set[level] = true;
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129 return set;
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130 elseif in_range then
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131 set[level] = true;
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132 end
1021
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133 end
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134 end
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135
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136 for _, level in ipairs(criteria) do
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137 set[level] = true;
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138 end
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139 return set;
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140 end
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141
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142 -- Initialize config, etc. --
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143 function reload_logging()
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144 local old_sink_types = {};
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145
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146 for name, sink_maker in pairs(log_sink_types) do
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147 old_sink_types[name] = sink_maker;
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148 log_sink_types[name] = nil;
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149 end
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150
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151 logger.reset();
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152
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153 default_logging = { { to = "console" , levels = { min = (debug_mode and "debug") or "info" } } };
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154 default_file_logging = { { to = "file", levels = { min = (debug_mode and "debug") or "info" }, timestamps = true } };
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155 default_timestamp = "%b %d %H:%M:%S";
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156
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157 logging_config = config.get("*", "core", "log") or default_logging;
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158
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159
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160 for name, sink_maker in pairs(old_sink_types) do
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161 log_sink_types[name] = sink_maker;
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162 end
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163
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164 prosody.events.fire_event("logging-reloaded");
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165 end
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166
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167 reload_logging();
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168 prosody.events.add_handler("config-reloaded", reload_logging);
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169
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170 --- Definition of built-in logging sinks ---
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171
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172 -- Null sink, must enter log_sink_types *first*
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173 function log_sink_types.nowhere()
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174 return function () return false; end;
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175 end
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176
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177 -- Column width for "source" (used by stdout and console)
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178 local sourcewidth = 20;
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179
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180 function log_sink_types.stdout()
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181 local timestamps = config.timestamps;
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182
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183 if timestamps == true then
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184 timestamps = default_timestamp; -- Default format
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185 end
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186
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187 return function (name, level, message, ...)
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188 sourcewidth = math_max(#name+2, sourcewidth);
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189 local namelen = #name;
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190 if timestamps then
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191 io_write(os_date(timestamps), " ");
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192 end
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193 if ... then
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194 io_write(name, rep(" ", sourcewidth-namelen), level, "\t", format(message, ...), "\n");
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195 else
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196 io_write(name, rep(" ", sourcewidth-namelen), level, "\t", message, "\n");
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197 end
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198 end
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199 end
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200
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201 do
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202 local do_pretty_printing = not os_getenv("WINDIR");
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203
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204 local logstyles = {};
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205 if do_pretty_printing then
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206 logstyles["info"] = getstyle("bold");
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207 logstyles["warn"] = getstyle("bold", "yellow");
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208 logstyles["error"] = getstyle("bold", "red");
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209 end
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210 function log_sink_types.console(config)
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211 -- Really if we don't want pretty colours then just use plain stdout
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212 if not do_pretty_printing then
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213 return log_sink_types.stdout(config);
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214 end
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215
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216 local timestamps = config.timestamps;
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217
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218 if timestamps == true then
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219 timestamps = default_timestamp; -- Default format
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220 end
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221
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222 return function (name, level, message, ...)
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223 sourcewidth = math_max(#name+2, sourcewidth);
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224 local namelen = #name;
1892
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225
1078
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226 if timestamps then
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227 io_write(os_date(timestamps), " ");
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228 end
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229 if ... then
1031
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230 io_write(name, rep(" ", sourcewidth-namelen), getstring(logstyles[level], level), "\t", format(message, ...), "\n");
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231 else
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232 io_write(name, rep(" ", sourcewidth-namelen), getstring(logstyles[level], level), "\t", message, "\n");
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233 end
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234 end
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235 end
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236 end
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237
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238 local empty_function = function () end;
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239 function log_sink_types.file(config)
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240 local log = config.filename;
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241 local logfile = io_open(log, "a+");
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242 if not logfile then
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243 return empty_function;
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244 end
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245 local write, flush = logfile.write, logfile.flush;
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246
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247 prosody.events.add_handler("logging-reloading", function ()
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248 if logfile then
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249 logfile:close();
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250 end
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251 end);
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252
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253 local timestamps = config.timestamps;
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254
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255 if timestamps == nil or timestamps == true then
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256 timestamps = default_timestamp; -- Default format
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257 end
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258
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259 return function (name, level, message, ...)
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260 if timestamps then
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261 write(logfile, os_date(timestamps), " ");
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262 end
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263 if ... then
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264 write(logfile, name, "\t", level, "\t", format(message, ...), "\n");
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265 else
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266 write(logfile, name, "\t" , level, "\t", message, "\n");
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267 end
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268 flush(logfile);
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269 end;
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270 end
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271
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272 function register_sink_type(name, sink_maker)
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273 local old_sink_maker = log_sink_types[name];
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274 log_sink_types[name] = sink_maker;
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275 return old_sink_maker;
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276 end
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277
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278 return _M;