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[Winston Log to file and console just like NodeJS] #NodeJS #Winston #console #log
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const util = require('util') | |
const path = require( 'path' ) | |
const winston = require( 'winston' ); | |
const { createLogger, transports, format } = winston | |
const { Console, File } = transports | |
const { timestamp } = format | |
// Adapted from https://github.com/winstonjs/winston/issues/1427 | |
const commonConfig = { | |
handleExceptions: true, | |
format: format.combine( | |
timestamp(), | |
{ | |
transform (info) { | |
const { timestamp, message } = info; | |
const level = info[Symbol.for('level')]; | |
const args = [message, ...(info[Symbol.for('splat')] || [])]; // join the args back into one arr | |
info.message = args; // for all custom transports (mainly the console ones) | |
let msg = args.map(e => { | |
if (e.toString() === '[object FileList]') | |
return util.inspect(e.toArray(), true, 10); | |
else if (e.toString() === '[object File]') | |
return util.inspect(e.toObject(), true, 10); | |
else if (e.toString() === '[object Object]') { | |
return util.inspect(e, true, 5); | |
} | |
else if (e instanceof Error) | |
return e.stack | |
else | |
return `${e}`; | |
}).join(' '); | |
info[Symbol.for('message')] = `${timestamp}|${level}|${msg}`; // for inbuild transport / file-transport | |
return info; | |
}, | |
}, | |
), | |
} | |
const logger = createLogger( | |
{ | |
level: 'debug', | |
levels: { | |
error: 0, | |
warn: 1, | |
info: 2, | |
debug: 3 | |
}, | |
transports: [ | |
new Console({ | |
...commonConfig, | |
format: commonConfig.format, | |
}), | |
new File( { | |
...commonConfig, | |
format: commonConfig.format, | |
dirname: path.join( __dirname ), | |
filename: 'audit.log', | |
} ) | |
], | |
} | |
) | |
console.error = function () { | |
return logger.error.apply( logger, [...arguments] ) | |
} | |
console.warn = function () { | |
return logger.warn.apply( logger, [...arguments] ) | |
} | |
console.info = function () { | |
return logger.info.apply( logger, [...arguments] ) | |
} | |
console.log = function () { | |
return logger.info.apply( logger, [...arguments] ) | |
} | |
console.debug = function () { | |
return logger.debug.apply( logger, [...arguments] ) | |
} | |
console.log( 'log: some stuff =', JSON.stringify( { msg: 'hello' }, null, 4 ), 'more', { nothing: 'here' }) | |
console.info( 'info: some stuff =', JSON.stringify( { msg: 'hello' }, null, 4 ), 'more', { nothing: 'here' }) | |
console.error( 'error: some stuff =', JSON.stringify( { msg: 'hello' }, null, 4 ), 'more', { nothing: 'here' }) | |
console.warn( 'warn: some stuff =', JSON.stringify( { msg: 'hello' }, null, 4 ), 'more', { nothing: 'here' }) | |
console.debug( 'debug: some stuff =', JSON.stringify( { msg: 'hello' }, null, 4 ), 'more', { nothing: 'here' }) | |
console.debug( 'debug: some stuff =', new Error('boom')) |
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