how to add logger to node js express project 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')
})
)
)
}
})
}