2 var dateFormat = require('./date_format')
5 , util = require('util')
6 , semver = require('semver')
7 , replacementRegExp = /%[sdj]/g
9 "messagePassThrough": function() { return messagePassThroughLayout; },
10 "basic": function() { return basicLayout; },
11 "colored": function() { return colouredLayout; },
12 "coloured": function() { return colouredLayout; },
13 "pattern": function (config) {
14 return patternLayout(config && config.pattern, config && config.tokens);
16 "dummy": function() { return dummyLayout; }
29 function wrapErrorsWithInspect(items) {
30 return items.map(function(item) {
31 if ((item instanceof Error) && item.stack) {
32 return { inspect: function() {
33 if (semver.satisfies(process.version, '>=6')) {
34 return util.format(item);
36 return util.format(item) + '\n' + item.stack;
45 function formatLogData(logData) {
46 var data = Array.isArray(logData) ? logData : Array.prototype.slice.call(arguments);
47 return util.format.apply(util, wrapErrorsWithInspect(data));
54 'underline' : [4, 24],
69 function colorizeStart(style) {
70 return style ? '\x1B[' + styles[style][0] + 'm' : '';
72 function colorizeEnd(style) {
73 return style ? '\x1B[' + styles[style][1] + 'm' : '';
76 * Taken from masylum's fork (https://github.com/masylum/log4js-node)
78 function colorize (str, style) {
79 return colorizeStart(style) + str + colorizeEnd(style);
82 function timestampLevelAndCategory(loggingEvent, colour, timezoneOffest) {
83 var output = colorize(
86 , dateFormat.asString(loggingEvent.startTime, timezoneOffest)
88 , loggingEvent.categoryName
96 * BasicLayout is a simple layout for storing the logs. The logs are stored
97 * in following format:
99 * [startTime] [logLevel] categoryName - message\n
102 * @author Stephan Strittmatter
104 function basicLayout (loggingEvent, timezoneOffset) {
105 return timestampLevelAndCategory(
109 ) + formatLogData(loggingEvent.data);
113 * colouredLayout - taken from masylum's fork.
114 * same as basicLayout, but with colours.
116 function colouredLayout (loggingEvent, timezoneOffset) {
117 return timestampLevelAndCategory(
119 colours[loggingEvent.level.toString()],
121 ) + formatLogData(loggingEvent.data);
124 function messagePassThroughLayout (loggingEvent) {
125 return formatLogData(loggingEvent.data);
128 function dummyLayout(loggingEvent) {
129 return loggingEvent.data[0];
134 * Format for specifiers is %[padding].[truncation][field]{[format]}
135 * e.g. %5.10p - left pad the log level by 5 characters, up to a max of 10
136 * Fields can be any of:
137 * - %r time in toLocaleTimeString format
142 * - %d date in various formats
146 * - %x{<tokenname>} add dynamic tokens to your log. Tokens are specified in the tokens parameter
147 * You can use %[ and %] to define a colored block.
149 * Tokens are specified as simple key:value objects.
150 * The key represents the token name whereas the value can be a string or function
151 * which is called to extract the value to put in the log message. If token is not
152 * found, it doesn't replace the field.
154 * A sample token would be: { "pid" : function() { return process.pid; } }
156 * Takes a pattern string, array of tokens and returns a layout function.
157 * @param {String} Log format pattern String
158 * @param {object} map object of different tokens
159 * @param {number} timezone offset in minutes
161 * @author Stephan Strittmatter
162 * @author Jan Schmidle
164 function patternLayout (pattern, tokens, timezoneOffset) {
165 // jshint maxstatements:22
166 var TTCC_CONVERSION_PATTERN = "%r %p %c - %m%n";
167 var regex = /%(-?[0-9]+)?(\.?[0-9]+)?([\[\]cdhmnprzxy%])(\{([^\}]+)\})?|([^%]+)/;
169 pattern = pattern || TTCC_CONVERSION_PATTERN;
171 function categoryName(loggingEvent, specifier) {
172 var loggerName = loggingEvent.categoryName;
174 var precision = parseInt(specifier, 10);
175 var loggerNameBits = loggerName.split(".");
176 if (precision < loggerNameBits.length) {
177 loggerName = loggerNameBits.slice(loggerNameBits.length - precision).join(".");
183 function formatAsDate(loggingEvent, specifier) {
184 var format = dateFormat.ISO8601_FORMAT;
187 // Pick up special cases
188 if (format == "ISO8601") {
189 format = dateFormat.ISO8601_FORMAT;
190 } else if (format == "ISO8601_WITH_TZ_OFFSET") {
191 format = dateFormat.ISO8601_WITH_TZ_OFFSET_FORMAT;
192 } else if (format == "ABSOLUTE") {
193 format = dateFormat.ABSOLUTETIME_FORMAT;
194 } else if (format == "DATE") {
195 format = dateFormat.DATETIME_FORMAT;
199 return dateFormat.asString(format, loggingEvent.startTime, timezoneOffset);
202 function hostname() {
203 return os.hostname().toString();
206 function formatMessage(loggingEvent) {
207 return formatLogData(loggingEvent.data);
210 function endOfLine() {
214 function logLevel(loggingEvent) {
215 return loggingEvent.level.toString();
218 function startTime(loggingEvent) {
219 return dateFormat.asString('hh:mm:ss', loggingEvent.startTime, timezoneOffset);
222 function startColour(loggingEvent) {
223 return colorizeStart(colours[loggingEvent.level.toString()]);
226 function endColour(loggingEvent) {
227 return colorizeEnd(colours[loggingEvent.level.toString()]);
234 function pid(loggingEvent) {
235 if (loggingEvent && loggingEvent.pid) {
236 return loggingEvent.pid;
242 function clusterInfo(loggingEvent, specifier) {
243 if (loggingEvent.cluster && specifier) {
245 .replace('%m', loggingEvent.cluster.master)
246 .replace('%w', loggingEvent.cluster.worker)
247 .replace('%i', loggingEvent.cluster.workerId);
248 } else if (loggingEvent.cluster) {
249 return loggingEvent.cluster.worker+'@'+loggingEvent.cluster.master;
255 function userDefined(loggingEvent, specifier) {
256 if (typeof(tokens[specifier]) !== 'undefined') {
257 if (typeof(tokens[specifier]) === 'function') {
258 return tokens[specifier](loggingEvent);
260 return tokens[specifier];
282 function replaceToken(conversionCharacter, loggingEvent, specifier) {
283 return replacers[conversionCharacter](loggingEvent, specifier);
286 function truncate(truncation, toTruncate) {
289 len = parseInt(truncation.substr(1), 10);
290 return toTruncate.substring(0, len);
296 function pad(padding, toPad) {
299 if (padding.charAt(0) == "-") {
300 len = parseInt(padding.substr(1), 10);
301 // Right pad with spaces
302 while (toPad.length < len) {
306 len = parseInt(padding, 10);
307 // Left pad with spaces
308 while (toPad.length < len) {
316 function truncateAndPad(toTruncAndPad, truncation, padding) {
317 var replacement = toTruncAndPad;
318 replacement = truncate(truncation, replacement);
319 replacement = pad(padding, replacement);
323 return function(loggingEvent) {
324 var formattedString = "";
326 var searchString = pattern;
328 while ((result = regex.exec(searchString))) {
329 var matchedString = result[0];
330 var padding = result[1];
331 var truncation = result[2];
332 var conversionCharacter = result[3];
333 var specifier = result[5];
334 var text = result[6];
336 // Check if the pattern matched was just normal text
338 formattedString += "" + text;
340 // Create a raw replacement string based on the conversion
341 // character and specifier
342 var replacement = replaceToken(conversionCharacter, loggingEvent, specifier);
343 formattedString += truncateAndPad(replacement, truncation, padding);
345 searchString = searchString.substr(result.index + result[0].length);
347 return formattedString;
353 basicLayout: basicLayout,
354 messagePassThroughLayout: messagePassThroughLayout,
355 patternLayout: patternLayout,
356 colouredLayout: colouredLayout,
357 coloredLayout: colouredLayout,
358 dummyLayout: dummyLayout,
359 addLayout: function(name, serializerGenerator) {
360 layoutMakers[name] = serializerGenerator;
362 layout: function(name, config) {
363 return layoutMakers[name] && layoutMakers[name](config);