express logger module code example

Example: express custom logger

import { Request, Response, NextFunction } from 'express'
import consola from 'consola'
import chalk from 'chalk'
import { dateFormat } from '../utils/util.date'

export const serviceLogger = (serviceName: string) => (req: Request, res: Response, next: NextFunction) => {
	if (process.env.NODE_ENV !== 'production') {
		customLogger(req, res, serviceName)
		next()
	}
}

const customLogger = (req: Request, res: Response, serviceName: string) => {
	res.on('finish', () => {
		if (res.statusCode >= 400) {
			consola.info(
				chalk.red(
					'[Logger]:',
					JSON.stringify({
						serviceName: serviceName,
						ipAddress: req.ip || req.headers['x-forwarded-host'] || req.connection.remoteAddress,
						path: req.url,
						method: req.method,
						status: res.statusCode,
						timestamp: dateFormat(new Date()).format('LLLL')
					})
				)
			)
		} else {
			consola.info(
				chalk.green(
					'[Logger]:',
					JSON.stringify({
						serviceName: serviceName,
						ipAddress: req.ip || req.headers['x-forwarded-host'] || req.connection.remoteAddress,
						path: req.url,
						method: req.method,
						status: res.statusCode,
						timestamp: dateFormat(new Date()).format('LLLL')
					})
				)
			)
		}
	})
}