mirror of
https://github.com/bjc/prosody.git
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276 lines
7.4 KiB
Lua
276 lines
7.4 KiB
Lua
-- Prosody IM
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-- Copyright (C) 2008-2010 Matthew Wild
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-- Copyright (C) 2008-2010 Waqas Hussain
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--
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-- This project is MIT/X11 licensed. Please see the
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-- COPYING file in the source package for more information.
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--
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local format = string.format;
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local setmetatable, rawset, pairs, ipairs, type =
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setmetatable, rawset, pairs, ipairs, type;
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local io_open, io_write = io.open, io.write;
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local math_max, rep = math.max, string.rep;
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local os_date = os.date;
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local getstyle, setstyle = require "util.termcolours".getstyle, require "util.termcolours".setstyle;
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if os.getenv("__FLUSH_LOG") then
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local io_flush = io.flush;
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local _io_write = io_write;
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io_write = function(...) _io_write(...); io_flush(); end
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end
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local config = require "core.configmanager";
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local logger = require "util.logger";
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local prosody = prosody;
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_G.log = logger.init("general");
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module "loggingmanager"
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-- The log config used if none specified in the config file (see reload_logging for initialization)
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local default_logging;
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local default_file_logging;
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local default_timestamp = "%b %d %H:%M:%S";
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-- The actual config loggingmanager is using
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local logging_config;
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local apply_sink_rules;
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local log_sink_types = setmetatable({}, { __newindex = function (t, k, v) rawset(t, k, v); apply_sink_rules(k); end; });
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local get_levels;
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local logging_levels = { "debug", "info", "warn", "error" }
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-- Put a rule into action. Requires that the sink type has already been registered.
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-- This function is called automatically when a new sink type is added [see apply_sink_rules()]
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local function add_rule(sink_config)
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local sink_maker = log_sink_types[sink_config.to];
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if sink_maker then
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-- Create sink
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local sink = sink_maker(sink_config);
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-- Set sink for all chosen levels
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for level in pairs(get_levels(sink_config.levels or logging_levels)) do
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logger.add_level_sink(level, sink);
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end
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else
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-- No such sink type
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end
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end
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-- Search for all rules using a particular sink type, and apply
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-- them. Called automatically when a new sink type is added to
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-- the log_sink_types table.
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function apply_sink_rules(sink_type)
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if type(logging_config) == "table" then
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for _, level in ipairs(logging_levels) do
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if type(logging_config[level]) == "string" then
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local value = logging_config[level];
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if sink_type == "file" and not value:match("^%*") then
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add_rule({
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to = sink_type;
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filename = value;
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timestamps = true;
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levels = { min = level };
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});
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elseif value == "*"..sink_type then
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add_rule({
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to = sink_type;
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levels = { min = level };
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});
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end
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end
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end
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for _, sink_config in ipairs(logging_config) do
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if (type(sink_config) == "table" and sink_config.to == sink_type) then
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add_rule(sink_config);
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elseif (type(sink_config) == "string" and sink_config:match("^%*(.+)") == sink_type) then
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add_rule({ levels = { min = "debug" }, to = sink_type });
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end
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end
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elseif type(logging_config) == "string" and (not logging_config:match("^%*")) and sink_type == "file" then
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-- User specified simply a filename, and the "file" sink type
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-- was just added
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for _, sink_config in pairs(default_file_logging) do
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sink_config.filename = logging_config;
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add_rule(sink_config);
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sink_config.filename = nil;
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end
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elseif type(logging_config) == "string" and logging_config:match("^%*(.+)") == sink_type then
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-- Log all levels (debug+) to this sink
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add_rule({ levels = { min = "debug" }, to = sink_type });
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end
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end
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--- Helper function to get a set of levels given a "criteria" table
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function get_levels(criteria, set)
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set = set or {};
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if type(criteria) == "string" then
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set[criteria] = true;
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return set;
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end
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local min, max = criteria.min, criteria.max;
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if min or max then
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local in_range;
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for _, level in ipairs(logging_levels) do
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if min == level then
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set[level] = true;
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in_range = true;
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elseif max == level then
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set[level] = true;
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return set;
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elseif in_range then
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set[level] = true;
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end
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end
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end
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for _, level in ipairs(criteria) do
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set[level] = true;
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end
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return set;
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end
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-- Initialize config, etc. --
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function reload_logging()
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local old_sink_types = {};
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for name, sink_maker in pairs(log_sink_types) do
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old_sink_types[name] = sink_maker;
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log_sink_types[name] = nil;
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end
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logger.reset();
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local debug_mode = config.get("*", "debug");
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default_logging = { { to = "console" , levels = { min = (debug_mode and "debug") or "info" } } };
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default_file_logging = {
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{ to = "file", levels = { min = (debug_mode and "debug") or "info" }, timestamps = true }
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};
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default_timestamp = "%b %d %H:%M:%S";
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logging_config = config.get("*", "log") or default_logging;
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for name, sink_maker in pairs(old_sink_types) do
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log_sink_types[name] = sink_maker;
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end
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prosody.events.fire_event("logging-reloaded");
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end
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reload_logging();
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prosody.events.add_handler("config-reloaded", reload_logging);
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--- Definition of built-in logging sinks ---
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-- Null sink, must enter log_sink_types *first*
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function log_sink_types.nowhere()
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return function () return false; end;
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end
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-- Column width for "source" (used by stdout and console)
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local sourcewidth = 20;
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function log_sink_types.stdout(config)
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local timestamps = config.timestamps;
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if timestamps == true then
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timestamps = default_timestamp; -- Default format
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end
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return function (name, level, message, ...)
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sourcewidth = math_max(#name+2, sourcewidth);
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local namelen = #name;
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if timestamps then
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io_write(os_date(timestamps), " ");
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end
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if ... then
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io_write(name, rep(" ", sourcewidth-namelen), level, "\t", format(message, ...), "\n");
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else
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io_write(name, rep(" ", sourcewidth-namelen), level, "\t", message, "\n");
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end
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end
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end
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do
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local do_pretty_printing = true;
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local logstyles = {};
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if do_pretty_printing then
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logstyles["info"] = getstyle("bold");
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logstyles["warn"] = getstyle("bold", "yellow");
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logstyles["error"] = getstyle("bold", "red");
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end
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function log_sink_types.console(config)
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-- Really if we don't want pretty colours then just use plain stdout
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if not do_pretty_printing then
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return log_sink_types.stdout(config);
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end
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local timestamps = config.timestamps;
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if timestamps == true then
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timestamps = default_timestamp; -- Default format
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end
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return function (name, level, message, ...)
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sourcewidth = math_max(#name+2, sourcewidth);
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local namelen = #name;
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if timestamps then
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io_write(os_date(timestamps), " ");
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end
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io_write(name, rep(" ", sourcewidth-namelen));
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setstyle(logstyles[level]);
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io_write(level);
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setstyle();
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if ... then
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io_write("\t", format(message, ...), "\n");
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else
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io_write("\t", message, "\n");
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end
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end
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end
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end
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local empty_function = function () end;
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function log_sink_types.file(config)
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local log = config.filename;
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local logfile = io_open(log, "a+");
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if not logfile then
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return empty_function;
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end
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local write, flush = logfile.write, logfile.flush;
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local timestamps = config.timestamps;
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if timestamps == nil or timestamps == true then
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timestamps = default_timestamp; -- Default format
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end
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return function (name, level, message, ...)
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if timestamps then
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write(logfile, os_date(timestamps), " ");
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end
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if ... then
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write(logfile, name, "\t", level, "\t", format(message, ...), "\n");
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else
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write(logfile, name, "\t" , level, "\t", message, "\n");
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end
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flush(logfile);
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end;
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end
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function register_sink_type(name, sink_maker)
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local old_sink_maker = log_sink_types[name];
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log_sink_types[name] = sink_maker;
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return old_sink_maker;
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end
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return _M;
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