1241 lines
37 KiB
JavaScript
1241 lines
37 KiB
JavaScript
/*
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* Copyright (c) 2013 Trent Mick. All rights reserved.
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*
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* The bunyan logging library for node.js.
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*/
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var VERSION = '0.20.1';
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// Bunyan log format version. This becomes the 'v' field on all log records.
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// `0` is until I release a version '1.0.0' of node-bunyan. Thereafter,
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// starting with `1`, this will be incremented if there is any backward
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// incompatible change to the log record format. Details will be in
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// 'CHANGES.md' (the change log).
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var LOG_VERSION = 0;
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var xxx = function xxx(s) { // internal dev/debug logging
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var args = ['XX' + 'X: '+s].concat(
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Array.prototype.slice.call(arguments, 1));
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console.error.apply(this, args);
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};
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var xxx = function xxx() {}; // comment out to turn on debug logging
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var os = require('os');
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var fs = require('fs');
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var util = require('util');
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var assert = require('assert');
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try {
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var dtrace = require('dtrace-provider');
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} catch (e) {
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dtrace = null;
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}
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var EventEmitter = require('events').EventEmitter;
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// The 'mv' module is required for rotating-file stream support.
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try {
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var mv = require('mv');
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} catch (e) {
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mv = null;
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}
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//---- Internal support stuff
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function objCopy(obj) {
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if (obj === null) {
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return null;
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} else if (Array.isArray(obj)) {
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return obj.slice();
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} else {
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var copy = {};
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Object.keys(obj).forEach(function (k) {
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copy[k] = obj[k];
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});
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return copy;
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}
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}
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var format = util.format;
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if (!format) {
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// If node < 0.6, then use its `util.format`:
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// <https://github.com/joyent/node/blob/master/lib/util.js#L22>:
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var inspect = util.inspect;
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var formatRegExp = /%[sdj%]/g;
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format = function format(f) {
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if (typeof (f) !== 'string') {
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var objects = [];
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for (var i = 0; i < arguments.length; i++) {
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objects.push(inspect(arguments[i]));
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}
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return objects.join(' ');
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}
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var i = 1;
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var args = arguments;
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var len = args.length;
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var str = String(f).replace(formatRegExp, function (x) {
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if (i >= len)
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return x;
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switch (x) {
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case '%s': return String(args[i++]);
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case '%d': return Number(args[i++]);
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case '%j': return JSON.stringify(args[i++], safeCycles());
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case '%%': return '%';
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default:
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return x;
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}
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});
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for (var x = args[i]; i < len; x = args[++i]) {
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if (x === null || typeof (x) !== 'object') {
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str += ' ' + x;
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} else {
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str += ' ' + inspect(x);
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}
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}
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return str;
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};
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}
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/**
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* Gather some caller info 3 stack levels up.
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* See <http://code.google.com/p/v8/wiki/JavaScriptStackTraceApi>.
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*/
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function getCaller3Info() {
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var obj = {};
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var saveLimit = Error.stackTraceLimit;
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var savePrepare = Error.prepareStackTrace;
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Error.stackTraceLimit = 3;
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Error.captureStackTrace(this, getCaller3Info);
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Error.prepareStackTrace = function (_, stack) {
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var caller = stack[2];
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obj.file = caller.getFileName();
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obj.line = caller.getLineNumber();
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var func = caller.getFunctionName();
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if (func)
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obj.func = func;
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};
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this.stack;
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Error.stackTraceLimit = saveLimit;
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Error.prepareStackTrace = savePrepare;
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return obj;
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}
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/**
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* Warn about an bunyan processing error.
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*
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* If file/line are given, this makes an attempt to warn on stderr only once.
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*
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* @param msg {String} Message with which to warn.
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* @param file {String} Optional. File path relevant for the warning.
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* @param line {String} Optional. Line number in `file` path relevant for
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* the warning.
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*/
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function _warn(msg, file, line) {
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assert.ok(msg);
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var key;
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if (file && line) {
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key = file + ':' + line;
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if (_warned[key]) {
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return;
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}
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_warned[key] = true;
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}
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process.stderr.write(msg + '\n');
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}
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var _warned = {};
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//---- Levels
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var TRACE = 10;
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var DEBUG = 20;
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var INFO = 30;
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var WARN = 40;
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var ERROR = 50;
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var FATAL = 60;
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var levelFromName = {
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'trace': TRACE,
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'debug': DEBUG,
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'info': INFO,
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'warn': WARN,
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'error': ERROR,
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'fatal': FATAL
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};
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// Dtrace probes.
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var dtp = undefined;
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var probes = dtrace && {};
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/**
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* Resolve a level number, name (upper or lowercase) to a level number value.
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*
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* @api public
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*/
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function resolveLevel(nameOrNum) {
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var level = (typeof (nameOrNum) === 'string'
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? levelFromName[nameOrNum.toLowerCase()]
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: nameOrNum);
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if (! (TRACE <= level && level <= FATAL)) {
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throw new Error('invalid level: ' + nameOrNum);
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}
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return level;
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}
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//---- Logger class
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/**
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* Create a Logger instance.
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*
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* @param options {Object} See documentation for full details. At minimum
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* this must include a 'name' string key. Configuration keys:
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* - `streams`: specify the logger output streams. This is an array of
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* objects with these fields:
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* - `type`: The stream type. See README.md for full details.
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* Often this is implied by the other fields. Examples are
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* 'file', 'stream' and "raw".
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* - `level`: Defaults to 'info'.
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* - `path` or `stream`: The specify the file path or writeable
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* stream to which log records are written. E.g.
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* `stream: process.stdout`.
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* - `closeOnExit` (boolean): Optional. Default is true for a
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* 'file' stream when `path` is given, false otherwise.
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* See README.md for full details.
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* - `level`: set the level for a single output stream (cannot be used
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* with `streams`)
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* - `stream`: the output stream for a logger with just one, e.g.
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* `process.stdout` (cannot be used with `streams`)
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* - `serializers`: object mapping log record field names to
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* serializing functions. See README.md for details.
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* - `src`: Boolean (default false). Set true to enable 'src' automatic
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* field with log call source info.
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* All other keys are log record fields.
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*
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* An alternative *internal* call signature is used for creating a child:
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* new Logger(<parent logger>, <child options>[, <child opts are simple>]);
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*
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* @param _childSimple (Boolean) An assertion that the given `_childOptions`
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* (a) only add fields (no config) and (b) no serialization handling is
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* required for them. IOW, this is a fast path for frequent child
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* creation.
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*/
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function Logger(options, _childOptions, _childSimple) {
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xxx('Logger start:', options)
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if (! this instanceof Logger) {
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return new Logger(options, _childOptions);
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}
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// Input arg validation.
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var parent;
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if (_childOptions !== undefined) {
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parent = options;
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options = _childOptions;
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if (! parent instanceof Logger) {
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throw new TypeError(
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'invalid Logger creation: do not pass a second arg');
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}
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}
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if (!options) {
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throw new TypeError('options (object) is required');
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}
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if (!parent) {
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if (!options.name) {
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throw new TypeError('options.name (string) is required');
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}
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} else {
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if (options.name) {
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throw new TypeError(
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'invalid options.name: child cannot set logger name');
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}
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}
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if (options.stream && options.streams) {
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throw new TypeError('cannot mix "streams" and "stream" options');
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}
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if (options.streams && !Array.isArray(options.streams)) {
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throw new TypeError('invalid options.streams: must be an array')
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}
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if (options.serializers && (typeof (options.serializers) !== 'object' ||
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Array.isArray(options.serializers))) {
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throw new TypeError('invalid options.serializers: must be an object')
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}
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EventEmitter.call(this);
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// Fast path for simple child creation.
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if (parent && _childSimple) {
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// `_isSimpleChild` is a signal to stream close handling that this child
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// owns none of its streams.
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this._isSimpleChild = true;
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this._level = parent._level;
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this.streams = parent.streams;
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this.serializers = parent.serializers;
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this.src = parent.src;
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var fields = this.fields = {};
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var parentFieldNames = Object.keys(parent.fields);
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for (var i = 0; i < parentFieldNames.length; i++) {
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var name = parentFieldNames[i];
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fields[name] = parent.fields[name];
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}
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var names = Object.keys(options);
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for (var i = 0; i < names.length; i++) {
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var name = names[i];
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fields[name] = options[name];
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}
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return;
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}
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// Null values.
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var self = this;
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if (parent) {
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this._level = parent._level;
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this.streams = [];
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for (var i = 0; i < parent.streams.length; i++) {
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var s = objCopy(parent.streams[i]);
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s.closeOnExit = false; // Don't own parent stream.
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this.streams.push(s);
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}
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this.serializers = objCopy(parent.serializers);
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this.src = parent.src;
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this.fields = objCopy(parent.fields);
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if (options.level) {
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this.level(options.level);
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}
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} else {
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this._level = Number.POSITIVE_INFINITY;
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this.streams = [];
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this.serializers = null;
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this.src = false;
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this.fields = {};
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}
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if (!dtp && dtrace) {
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dtp = dtrace.createDTraceProvider('bunyan');
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for (var level in levelFromName) {
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var probe;
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probes[levelFromName[level]] = probe =
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dtp.addProbe('log-' + level, 'char *');
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// Explicitly add a reference to dtp to prevent it from being GC'd
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probe.dtp = dtp;
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}
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dtp.enable();
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}
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// Helpers
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function addStream(s) {
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s = objCopy(s);
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// Implicit 'type' from other args.
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var type = s.type;
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if (!s.type) {
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if (s.stream) {
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s.type = 'stream';
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} else if (s.path) {
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s.type = 'file'
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}
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}
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s.raw = (s.type === 'raw'); // PERF: Allow for faster check in `_emit`.
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if (s.level) {
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s.level = resolveLevel(s.level);
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} else if (options.level) {
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s.level = resolveLevel(options.level);
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} else {
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s.level = INFO;
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}
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if (s.level < self._level) {
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self._level = s.level;
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}
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switch (s.type) {
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case 'stream':
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if (!s.closeOnExit) {
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s.closeOnExit = false;
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}
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break;
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case 'file':
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if (!s.stream) {
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s.stream = fs.createWriteStream(s.path,
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{flags: 'a', encoding: 'utf8'});
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s.stream.on('error', function (err) {
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self.emit('error', err, s);
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});
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if (!s.closeOnExit) {
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s.closeOnExit = true;
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}
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} else {
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if (!s.closeOnExit) {
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s.closeOnExit = false;
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}
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}
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break;
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case 'rotating-file':
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assert.ok(!s.stream,
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'"rotating-file" stream should not give a "stream"');
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assert.ok(s.path);
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assert.ok(mv, '"rotating-file" stream type is not supported: '
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+ 'missing "mv" module');
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s.stream = new RotatingFileStream(s);
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if (!s.closeOnExit) {
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s.closeOnExit = true;
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}
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break;
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case 'raw':
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if (!s.closeOnExit) {
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s.closeOnExit = false;
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}
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break;
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default:
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throw new TypeError('unknown stream type "' + s.type + '"');
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}
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self.streams.push(s);
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}
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function addSerializers(serializers) {
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if (!self.serializers) {
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self.serializers = {};
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}
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Object.keys(serializers).forEach(function (field) {
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var serializer = serializers[field];
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if (typeof (serializer) !== 'function') {
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throw new TypeError(format(
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'invalid serializer for "%s" field: must be a function',
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field));
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} else {
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self.serializers[field] = serializer;
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}
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});
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}
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// Handle *config* options (i.e. options that are not just plain data
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// for log records).
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if (options.stream) {
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addStream({
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type: 'stream',
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stream: options.stream,
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closeOnExit: false,
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level: (options.level ? resolveLevel(options.level) : INFO)
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});
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} else if (options.streams) {
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options.streams.forEach(addStream);
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} else if (parent && options.level) {
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this.level(options.level);
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} else if (!parent) {
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addStream({
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type: 'stream',
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stream: process.stdout,
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closeOnExit: false,
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level: (options.level ? resolveLevel(options.level) : INFO)
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});
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}
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if (options.serializers) {
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addSerializers(options.serializers);
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}
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if (options.src) {
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this.src = true;
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}
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xxx('Logger: ', self)
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// Fields.
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// These are the default fields for log records (minus the attributes
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// removed in this constructor). To allow storing raw log records
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// (unrendered), `this.fields` must never be mutated. Create a copy for
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// any changes.
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var fields = objCopy(options);
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delete fields.stream;
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delete fields.level;
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delete fields.streams;
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delete fields.serializers;
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delete fields.src;
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if (this.serializers) {
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this._applySerializers(fields);
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}
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if (!fields.hostname) {
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fields.hostname = os.hostname();
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}
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if (!fields.pid) {
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fields.pid = process.pid;
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}
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Object.keys(fields).forEach(function (k) {
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self.fields[k] = fields[k];
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});
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}
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util.inherits(Logger, EventEmitter);
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|
|
|
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/**
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* Create a child logger, typically to add a few log record fields.
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*
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* This can be useful when passing a logger to a sub-component, e.g. a
|
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* 'wuzzle' component of your service:
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*
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* var wuzzleLog = log.child({component: 'wuzzle'})
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* var wuzzle = new Wuzzle({..., log: wuzzleLog})
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*
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* Then log records from the wuzzle code will have the same structure as
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* the app log, *plus the component='wuzzle' field*.
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*
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* @param options {Object} Optional. Set of options to apply to the child.
|
|
* All of the same options for a new Logger apply here. Notes:
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* - The parent's streams are inherited and cannot be removed in this
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* call. Any given `streams` are *added* to the set inherited from
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* the parent.
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* - The parent's serializers are inherited, though can effectively be
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* overwritten by using duplicate keys.
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* - Can use `level` to set the level of the streams inherited from
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* the parent. The level for the parent is NOT affected.
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|
* @param simple {Boolean} Optional. Set to true to assert that `options`
|
|
* (a) only add fields (no config) and (b) no serialization handling is
|
|
* required for them. IOW, this is a fast path for frequent child
|
|
* creation. See 'tools/timechild.js' for numbers.
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*/
|
|
Logger.prototype.child = function (options, simple) {
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return new Logger(this, options || {}, simple);
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}
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|
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|
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/* BEGIN JSSTYLED */
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|
/**
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* Close this logger.
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*
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* This closes streams (that it owns, as per 'endOnClose' attributes on
|
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* streams), etc. Typically you **don't** need to bother calling this.
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|
Logger.prototype.close = function () {
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if (this._closed) {
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return;
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}
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|
if (!this._isSimpleChild) {
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self.streams.forEach(function (s) {
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if (s.endOnClose) {
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xxx('closing stream s:', s);
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s.stream.end();
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s.endOnClose = false;
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}
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});
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}
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this._closed = true;
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}
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*/
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/* END JSSTYLED */
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|
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|
|
/**
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|
* Get/set the level of all streams on this logger.
|
|
*
|
|
* Get Usage:
|
|
* // Returns the current log level (lowest level of all its streams).
|
|
* log.level() -> INFO
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|
*
|
|
* Set Usage:
|
|
* log.level(INFO) // set all streams to level INFO
|
|
* log.level('info') // can use 'info' et al aliases
|
|
*/
|
|
Logger.prototype.level = function level(value) {
|
|
if (value === undefined) {
|
|
return this._level;
|
|
}
|
|
var newLevel = resolveLevel(value);
|
|
var len = this.streams.length;
|
|
for (var i = 0; i < len; i++) {
|
|
this.streams[i].level = newLevel;
|
|
}
|
|
this._level = newLevel;
|
|
}
|
|
|
|
|
|
/**
|
|
* Get/set the level of a particular stream on this logger.
|
|
*
|
|
* Get Usage:
|
|
* // Returns an array of the levels of each stream.
|
|
* log.levels() -> [TRACE, INFO]
|
|
*
|
|
* // Returns a level of the identified stream.
|
|
* log.levels(0) -> TRACE // level of stream at index 0
|
|
* log.levels('foo') // level of stream with name 'foo'
|
|
*
|
|
* Set Usage:
|
|
* log.levels(0, INFO) // set level of stream 0 to INFO
|
|
* log.levels(0, 'info') // can use 'info' et al aliases
|
|
* log.levels('foo', WARN) // set stream named 'foo' to WARN
|
|
*
|
|
* Stream names: When streams are defined, they can optionally be given
|
|
* a name. For example,
|
|
* log = new Logger({
|
|
* streams: [
|
|
* {
|
|
* name: 'foo',
|
|
* path: '/var/log/my-service/foo.log'
|
|
* level: 'trace'
|
|
* },
|
|
* ...
|
|
*
|
|
* @param name {String|Number} The stream index or name.
|
|
* @param value {Number|String} The level value (INFO) or alias ('info').
|
|
* If not given, this is a 'get' operation.
|
|
* @throws {Error} If there is no stream with the given name.
|
|
*/
|
|
Logger.prototype.levels = function levels(name, value) {
|
|
if (name === undefined) {
|
|
assert.equal(value, undefined);
|
|
return this.streams.map(
|
|
function (s) { return s.level });
|
|
}
|
|
var stream;
|
|
if (typeof (name) === 'number') {
|
|
stream = this.streams[name];
|
|
if (stream === undefined) {
|
|
throw new Error('invalid stream index: ' + name);
|
|
}
|
|
} else {
|
|
var len = this.streams.length;
|
|
for (var i = 0; i < len; i++) {
|
|
var s = this.streams[i];
|
|
if (s.name === name) {
|
|
stream = s;
|
|
break;
|
|
}
|
|
}
|
|
if (!stream) {
|
|
throw new Error(format('no stream with name "%s"', name));
|
|
}
|
|
}
|
|
if (value === undefined) {
|
|
return stream.level;
|
|
} else {
|
|
var newLevel = resolveLevel(value);
|
|
stream.level = newLevel;
|
|
if (newLevel < this._level) {
|
|
this._level = newLevel;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* Apply registered serializers to the appropriate keys in the given fields.
|
|
*
|
|
* Pre-condition: This is only called if there is at least one serializer.
|
|
*
|
|
* @param fields (Object) The log record fields.
|
|
* @param excludeFields (Object) Optional mapping of keys to `true` for
|
|
* keys to NOT apply a serializer.
|
|
*/
|
|
Logger.prototype._applySerializers = function (fields, excludeFields) {
|
|
var self = this;
|
|
|
|
xxx('_applySerializers: excludeFields', excludeFields);
|
|
|
|
// Check each serializer against these (presuming number of serializers
|
|
// is typically less than number of fields).
|
|
Object.keys(this.serializers).forEach(function (name) {
|
|
if (fields[name] === undefined ||
|
|
(excludeFields && excludeFields[name]))
|
|
{
|
|
return;
|
|
}
|
|
xxx('_applySerializers; apply to "%s" key', name)
|
|
try {
|
|
fields[name] = self.serializers[name](fields[name]);
|
|
} catch (err) {
|
|
_warn(format('bunyan: ERROR: This should never happen. '
|
|
+ 'This is a bug in <https://github.com/trentm/node-bunyan> '
|
|
+ 'or in this application. Exception from "%s" Logger '
|
|
+ 'serializer: %s',
|
|
name, err.stack || err));
|
|
fields[name] = format('(Error in Bunyan log "%s" serializer '
|
|
+ 'broke field. See stderr for details.)', name);
|
|
}
|
|
});
|
|
}
|
|
|
|
|
|
/**
|
|
* A log record is a 4-tuple:
|
|
* [<default fields object>,
|
|
* <log record fields object>,
|
|
* <level integer>,
|
|
* <msg args array>]
|
|
* For Perf reasons, we only render this down to a single object when
|
|
* it is emitted.
|
|
*/
|
|
Logger.prototype._mkRecord = function (fields, level, msgArgs) {
|
|
var recFields = (fields ? objCopy(fields) : null);
|
|
return [this.fields, recFields, level, msgArgs];
|
|
}
|
|
|
|
|
|
/**
|
|
* Emit a log record.
|
|
*
|
|
* @param rec {log record}
|
|
* @param noemit {Boolean} Optional. Set to true to skip emission
|
|
* and just return the JSON string.
|
|
*/
|
|
Logger.prototype._emit = function (rec, noemit) {
|
|
var i;
|
|
|
|
// Lazily determine if this Logger has non-'raw' streams. If there are
|
|
// any, then we need to stringify the log record.
|
|
if (this.haveNonRawStreams === undefined) {
|
|
this.haveNonRawStreams = false;
|
|
for (i = 0; i < this.streams.length; i++) {
|
|
if (!this.streams[i].raw) {
|
|
this.haveNonRawStreams = true;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Stringify the object. Attempt to warn/recover on error.
|
|
var str;
|
|
if (noemit || this.haveNonRawStreams) {
|
|
str = JSON.stringify(rec, safeCycles()) + '\n';
|
|
}
|
|
|
|
if (noemit)
|
|
return str;
|
|
|
|
var level = rec.level;
|
|
for (i = 0; i < this.streams.length; i++) {
|
|
var s = this.streams[i];
|
|
if (s.level <= level) {
|
|
xxx('writing log rec "%s" to "%s" stream (%d <= %d): %j',
|
|
rec.msg, s.type, s.level, level, rec);
|
|
s.stream.write(s.raw ? rec : str);
|
|
}
|
|
};
|
|
|
|
return str;
|
|
}
|
|
|
|
|
|
/**
|
|
* Build a log emitter function for level minLevel. I.e. this is the
|
|
* creator of `log.info`, `log.error`, etc.
|
|
*/
|
|
function mkLogEmitter(minLevel) {
|
|
return function () {
|
|
var log = this;
|
|
|
|
function mkRecord(args) {
|
|
var excludeFields;
|
|
if (args[0] instanceof Error) {
|
|
// `log.<level>(err, ...)`
|
|
fields = {err: errSerializer(args[0])};
|
|
excludeFields = {err: true};
|
|
if (args.length === 1) {
|
|
msgArgs = [fields.err.message];
|
|
} else {
|
|
msgArgs = Array.prototype.slice.call(args, 1);
|
|
}
|
|
} else if (typeof (args[0]) === 'string') {
|
|
// `log.<level>(msg, ...)`
|
|
fields = null;
|
|
msgArgs = Array.prototype.slice.call(args);
|
|
} else if (Buffer.isBuffer(args[0])) { // `log.<level>(buf, ...)`
|
|
// Almost certainly an error, show `inspect(buf)`. See bunyan
|
|
// issue #35.
|
|
fields = null;
|
|
msgArgs = Array.prototype.slice.call(args);
|
|
msgArgs[0] = util.inspect(msgArgs[0]);
|
|
} else { // `log.<level>(fields, msg, ...)`
|
|
fields = args[0];
|
|
msgArgs = Array.prototype.slice.call(args, 1);
|
|
}
|
|
|
|
// Build up the record object.
|
|
var rec = objCopy(log.fields);
|
|
var level = rec.level = minLevel;
|
|
var recFields = (fields ? objCopy(fields) : null);
|
|
if (recFields) {
|
|
if (log.serializers) {
|
|
log._applySerializers(recFields, excludeFields);
|
|
}
|
|
Object.keys(recFields).forEach(function (k) {
|
|
rec[k] = recFields[k];
|
|
});
|
|
}
|
|
rec.msg = format.apply(log, msgArgs);
|
|
if (!rec.time) {
|
|
rec.time = (new Date());
|
|
}
|
|
// Get call source info
|
|
if (log.src && !rec.src) {
|
|
rec.src = getCaller3Info()
|
|
}
|
|
rec.v = LOG_VERSION;
|
|
|
|
return rec;
|
|
};
|
|
|
|
var fields = null;
|
|
var msgArgs = arguments;
|
|
var str = null;
|
|
var rec = null;
|
|
if (arguments.length === 0) { // `log.<level>()`
|
|
return (this._level <= minLevel);
|
|
} else if (this._level > minLevel) {
|
|
/* pass through */
|
|
} else {
|
|
rec = mkRecord(msgArgs);
|
|
str = this._emit(rec);
|
|
}
|
|
probes && probes[minLevel].fire(function () {
|
|
return [ str ||
|
|
(rec && log._emit(rec, true)) ||
|
|
log._emit(mkRecord(msgArgs), true) ];
|
|
});
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* The functions below log a record at a specific level.
|
|
*
|
|
* Usages:
|
|
* log.<level>() -> boolean is-trace-enabled
|
|
* log.<level>(<Error> err, [<string> msg, ...])
|
|
* log.<level>(<string> msg, ...)
|
|
* log.<level>(<object> fields, <string> msg, ...)
|
|
*
|
|
* where <level> is the lowercase version of the log level. E.g.:
|
|
*
|
|
* log.info()
|
|
*
|
|
* @params fields {Object} Optional set of additional fields to log.
|
|
* @params msg {String} Log message. This can be followed by additional
|
|
* arguments that are handled like
|
|
* [util.format](http://nodejs.org/docs/latest/api/all.html#util.format).
|
|
*/
|
|
Logger.prototype.trace = mkLogEmitter(TRACE);
|
|
Logger.prototype.debug = mkLogEmitter(DEBUG);
|
|
Logger.prototype.info = mkLogEmitter(INFO);
|
|
Logger.prototype.warn = mkLogEmitter(WARN);
|
|
Logger.prototype.error = mkLogEmitter(ERROR);
|
|
Logger.prototype.fatal = mkLogEmitter(FATAL);
|
|
|
|
|
|
|
|
//---- Standard serializers
|
|
// A serializer is a function that serializes a JavaScript object to a
|
|
// JSON representation for logging. There is a standard set of presumed
|
|
// interesting objects in node.js-land.
|
|
|
|
Logger.stdSerializers = {};
|
|
|
|
// Serialize an HTTP request.
|
|
Logger.stdSerializers.req = function req(req) {
|
|
if (!req || !req.connection)
|
|
return req;
|
|
return {
|
|
method: req.method,
|
|
url: req.url,
|
|
headers: req.headers,
|
|
remoteAddress: req.connection.remoteAddress,
|
|
remotePort: req.connection.remotePort
|
|
};
|
|
// Trailers: Skipping for speed. If you need trailers in your app, then
|
|
// make a custom serializer.
|
|
//if (Object.keys(trailers).length > 0) {
|
|
// obj.trailers = req.trailers;
|
|
//}
|
|
};
|
|
|
|
// Serialize an HTTP response.
|
|
Logger.stdSerializers.res = function res(res) {
|
|
if (!res || !res.statusCode)
|
|
return res;
|
|
return {
|
|
statusCode: res.statusCode,
|
|
header: res._header
|
|
}
|
|
};
|
|
|
|
|
|
/*
|
|
* This function dumps long stack traces for exceptions having a cause()
|
|
* method. The error classes from
|
|
* [verror](https://github.com/davepacheco/node-verror) and
|
|
* [restify v2.0](https://github.com/mcavage/node-restify) are examples.
|
|
*
|
|
* Based on `dumpException` in
|
|
* https://github.com/davepacheco/node-extsprintf/blob/master/lib/extsprintf.js
|
|
*/
|
|
function getFullErrorStack(ex)
|
|
{
|
|
var ret = ex.stack || ex.toString();
|
|
if (ex.cause && typeof (ex.cause) === 'function') {
|
|
var cex = ex.cause();
|
|
if (cex) {
|
|
ret += '\nCaused by: ' + getFullErrorStack(cex);
|
|
}
|
|
}
|
|
return (ret);
|
|
}
|
|
|
|
// Serialize an Error object
|
|
// (Core error properties are enumerable in node 0.4, not in 0.6).
|
|
var errSerializer = Logger.stdSerializers.err = function err(err) {
|
|
if (!err || !err.stack)
|
|
return err;
|
|
var obj = {
|
|
message: err.message,
|
|
name: err.name,
|
|
stack: getFullErrorStack(err),
|
|
code: err.code,
|
|
signal: err.signal
|
|
}
|
|
return obj;
|
|
};
|
|
|
|
|
|
// A JSON stringifier that handles cycles safely.
|
|
// Usage: JSON.stringify(obj, safeCycles())
|
|
function safeCycles() {
|
|
var seen = [];
|
|
return function (key, val) {
|
|
if (!val || typeof (val) !== 'object') {
|
|
return val;
|
|
}
|
|
if (seen.indexOf(val) !== -1) {
|
|
return '[Circular]';
|
|
}
|
|
seen.push(val);
|
|
return val;
|
|
};
|
|
}
|
|
|
|
|
|
/**
|
|
* XXX
|
|
*/
|
|
if (mv) {
|
|
|
|
function RotatingFileStream(options) {
|
|
this.path = options.path;
|
|
this.stream = fs.createWriteStream(this.path,
|
|
{flags: 'a', encoding: 'utf8'});
|
|
this.count = (options.count == null ? 10 : options.count);
|
|
assert.ok(typeof (this.count) === 'number' && this.count >= 0);
|
|
|
|
// Parse `options.period`.
|
|
if (options.period) {
|
|
// <number><scope> where scope is:
|
|
// h hours (at the start of the hour)
|
|
// d days (at the start of the day, i.e. just after midnight)
|
|
// w weeks (at the start of Sunday)
|
|
// m months (on the first of the month)
|
|
// y years (at the start of Jan 1st)
|
|
// with special values 'hourly' (1h), 'daily' (1d), "weekly" (1w),
|
|
// 'monthly' (1m) and 'yearly' (1y)
|
|
var period = {
|
|
'hourly': '1h',
|
|
'daily': '1d',
|
|
'weekly': '1w',
|
|
'monthly': '1m',
|
|
'yearly': '1y'
|
|
}[options.period] || options.period;
|
|
var m = /^([1-9][0-9]*)([hdwmy]|ms)$/.exec(period);
|
|
if (!m) {
|
|
throw new Error(format('invalid period: "%s"', options.period));
|
|
}
|
|
this.periodNum = Number(m[1]);
|
|
this.periodScope = m[2];
|
|
} else {
|
|
this.periodNum = 1;
|
|
this.periodScope = 'd';
|
|
}
|
|
|
|
// TODO: template support for backup files
|
|
// template: <path to which to rotate>
|
|
// default is %P.%n
|
|
// '/var/log/archive/foo.log' -> foo.log.%n
|
|
// '/var/log/archive/foo.log.%n'
|
|
// codes:
|
|
// XXX support strftime codes (per node version of those)
|
|
// or whatever module. Pick non-colliding for extra
|
|
// codes
|
|
// %P `path` base value
|
|
// %n integer number of rotated log (1,2,3,...)
|
|
// %d datetime in YYYY-MM-DD_HH-MM-SS
|
|
// XXX what should default date format be?
|
|
// prior art? Want to avoid ':' in
|
|
// filenames (illegal on Windows for one).
|
|
|
|
this.rotQueue = [];
|
|
this.rotating = false;
|
|
this._setupNextRot();
|
|
}
|
|
|
|
util.inherits(RotatingFileStream, EventEmitter);
|
|
|
|
RotatingFileStream.prototype._setupNextRot = function () {
|
|
var self = this;
|
|
this.rotAt = this._nextRotTime();
|
|
this.timeout = setTimeout(
|
|
function () { self.rotate(); },
|
|
this.rotAt - Date.now());
|
|
}
|
|
|
|
RotatingFileStream.prototype._nextRotTime = function _nextRotTime(first) {
|
|
var _DEBUG = false;
|
|
if (_DEBUG)
|
|
console.log('-- _nextRotTime: %s%s', this.periodNum, this.periodScope);
|
|
var d = new Date();
|
|
|
|
if (_DEBUG) console.log(' now local: %s', d);
|
|
if (_DEBUG) console.log(' now utc: %s', d.toISOString());
|
|
var rotAt;
|
|
switch (this.periodScope) {
|
|
case 'ms':
|
|
// Hidden millisecond period for debugging.
|
|
if (this.rotAt) {
|
|
rotAt = this.rotAt + this.periodNum;
|
|
} else {
|
|
rotAt = Date.now() + this.periodNum;
|
|
}
|
|
break;
|
|
case 'h':
|
|
if (this.rotAt) {
|
|
rotAt = this.rotAt + this.periodNum * 60 * 60 * 1000;
|
|
} else {
|
|
// First time: top of the next hour.
|
|
rotAt = Date.UTC(d.getUTCFullYear(), d.getUTCMonth(),
|
|
d.getUTCDate(), d.getUTCHours() + 1);
|
|
}
|
|
break;
|
|
case 'd':
|
|
if (this.rotAt) {
|
|
rotAt = this.rotAt + this.periodNum * 24 * 60 * 60 * 1000;
|
|
} else {
|
|
// First time: start of tomorrow (i.e. at the coming midnight) UTC.
|
|
rotAt = Date.UTC(d.getUTCFullYear(), d.getUTCMonth(),
|
|
d.getUTCDate() + 1);
|
|
}
|
|
break;
|
|
case 'w':
|
|
// Currently, always on Sunday morning at 00:00:00 (UTC).
|
|
if (this.rotAt) {
|
|
rotAt = this.rotAt + this.periodNum * 7 * 24 * 60 * 60 * 1000;
|
|
} else {
|
|
// First time: this coming Sunday.
|
|
rotAt = Date.UTC(d.getUTCFullYear(), d.getUTCMonth(),
|
|
d.getUTCDate() + (7 - d.getUTCDay()));
|
|
}
|
|
break;
|
|
case 'm':
|
|
if (this.rotAt) {
|
|
rotAt = Date.UTC(d.getUTCFullYear(),
|
|
d.getUTCMonth() + this.periodNum, 1);
|
|
} else {
|
|
// First time: the start of the next month.
|
|
rotAt = Date.UTC(d.getUTCFullYear(), d.getUTCMonth() + 1, 1);
|
|
}
|
|
break;
|
|
case 'y':
|
|
if (this.rotAt) {
|
|
rotAt = Date.UTC(d.getUTCFullYear() + this.periodNum, 0, 1);
|
|
} else {
|
|
// First time: the start of the next year.
|
|
rotAt = Date.UTC(d.getUTCFullYear() + 1, 0, 1);
|
|
}
|
|
break;
|
|
default:
|
|
assert.fail(format('invalid period scope: "%s"', this.periodScope));
|
|
}
|
|
|
|
if (_DEBUG) {
|
|
console.log(' **rotAt**: %s (utc: %s)', rotAt,
|
|
new Date(rotAt).toUTCString());
|
|
var now = Date.now();
|
|
console.log(' now: %s (%sms == %smin == %sh to go)',
|
|
now,
|
|
rotAt - now,
|
|
(rotAt-now)/1000/60,
|
|
(rotAt-now)/1000/60/60);
|
|
}
|
|
return rotAt;
|
|
};
|
|
|
|
RotatingFileStream.prototype.rotate = function rotate() {
|
|
// XXX What about shutdown?
|
|
var self = this;
|
|
var _DEBUG = false;
|
|
|
|
if (_DEBUG) console.log('-- [%s] rotating %s', new Date(), self.path);
|
|
if (self.rotating) {
|
|
throw new TypeError('cannot start a rotation when already rotating');
|
|
}
|
|
self.rotating = true;
|
|
|
|
self.stream.end(); // XXX can do moves sync after this? test at high rate
|
|
|
|
function del() {
|
|
var toDel = self.path + '.' + String(n - 1);
|
|
if (n === 0) {
|
|
toDel = self.path;
|
|
}
|
|
n -= 1;
|
|
if (_DEBUG) console.log('rm %s', toDel);
|
|
fs.unlink(toDel, function (delErr) {
|
|
//XXX handle err other than not exists
|
|
moves();
|
|
});
|
|
}
|
|
|
|
function moves() {
|
|
if (self.count === 0 || n < 0) {
|
|
return finish();
|
|
}
|
|
var before = self.path;
|
|
var after = self.path + '.' + String(n);
|
|
if (n > 0) {
|
|
before += '.' + String(n - 1);
|
|
}
|
|
n -= 1;
|
|
fs.exists(before, function (exists) {
|
|
if (!exists) {
|
|
moves();
|
|
} else {
|
|
if (_DEBUG) console.log('mv %s %s', before, after);
|
|
mv(before, after, function (mvErr) {
|
|
if (mvErr) {
|
|
self.emit('error', mvErr);
|
|
finish(); // XXX finish here?
|
|
} else {
|
|
moves();
|
|
}
|
|
});
|
|
}
|
|
})
|
|
}
|
|
|
|
function finish() {
|
|
if (_DEBUG) console.log('open %s', self.path);
|
|
self.stream = fs.createWriteStream(self.path,
|
|
{flags: 'a', encoding: 'utf8'});
|
|
var q = self.rotQueue, len = q.length;
|
|
for (var i = 0; i < len; i++) {
|
|
self.stream.write(q[i]);
|
|
}
|
|
self.rotQueue = [];
|
|
self.rotating = false;
|
|
self.emit('drain');
|
|
self._setupNextRot();
|
|
}
|
|
|
|
var n = this.count;
|
|
del();
|
|
};
|
|
|
|
RotatingFileStream.prototype.write = function write(s) {
|
|
if (this.rotating) {
|
|
this.rotQueue.push(s);
|
|
return false;
|
|
} else {
|
|
return this.stream.write(s);
|
|
}
|
|
};
|
|
|
|
RotatingFileStream.prototype.end = function end(s) {
|
|
this.stream.end();
|
|
};
|
|
|
|
RotatingFileStream.prototype.destroy = function destroy(s) {
|
|
this.stream.destroy();
|
|
};
|
|
|
|
RotatingFileStream.prototype.destroySoon = function destroySoon(s) {
|
|
this.stream.destroySoon();
|
|
};
|
|
|
|
} /* if (mv) */
|
|
|
|
|
|
|
|
/**
|
|
* RingBuffer is a Writable Stream that just stores the last N records in
|
|
* memory.
|
|
*
|
|
* @param options {Object}, with the following fields:
|
|
*
|
|
* - limit: number of records to keep in memory
|
|
*/
|
|
function RingBuffer(options) {
|
|
this.limit = options && options.limit ? options.limit : 100;
|
|
this.writable = true;
|
|
this.records = [];
|
|
EventEmitter.call(this);
|
|
}
|
|
|
|
util.inherits(RingBuffer, EventEmitter);
|
|
|
|
RingBuffer.prototype.write = function (record) {
|
|
if (!this.writable)
|
|
throw (new Error('RingBuffer has been ended already'));
|
|
|
|
this.records.push(record);
|
|
|
|
if (this.records.length > this.limit)
|
|
this.records.shift();
|
|
|
|
return (true);
|
|
};
|
|
|
|
RingBuffer.prototype.end = function () {
|
|
if (arguments.length > 0)
|
|
this.write.apply(this, Array.prototype.slice.call(arguments));
|
|
this.writable = false;
|
|
};
|
|
|
|
RingBuffer.prototype.destroy = function () {
|
|
this.writable = false;
|
|
this.emit('close');
|
|
};
|
|
|
|
RingBuffer.prototype.destroySoon = function () {
|
|
this.destroy();
|
|
};
|
|
|
|
|
|
//---- Exports
|
|
|
|
module.exports = Logger;
|
|
|
|
module.exports.TRACE = TRACE;
|
|
module.exports.DEBUG = DEBUG;
|
|
module.exports.INFO = INFO;
|
|
module.exports.WARN = WARN;
|
|
module.exports.ERROR = ERROR;
|
|
module.exports.FATAL = FATAL;
|
|
module.exports.resolveLevel = resolveLevel;
|
|
|
|
module.exports.VERSION = VERSION;
|
|
module.exports.LOG_VERSION = LOG_VERSION;
|
|
|
|
module.exports.createLogger = function createLogger(options) {
|
|
return new Logger(options);
|
|
};
|
|
|
|
module.exports.RingBuffer = RingBuffer;
|
|
|
|
// Useful for custom `type == 'raw'` streams that may do JSON stringification
|
|
// of log records themselves. Usage:
|
|
// var str = JSON.stringify(rec, bunyan.safeCycles());
|
|
module.exports.safeCycles = safeCycles;
|