@elartedelcodigo/express-logger v1.3.0

Librería para generar logs para express con pino

Instalación

npm install @elartedelcodigo/express-logger

Ejemplo

app
  ├─ src
  │     └─ routes
  │           └─ application.ts
  └─ server.ts

Archivo src/routes/application.ts

import express, { NextFunction, Request, Response } from 'express'
import { ExpressLogger } from '@elartedelcodigo/express-logger'

const router = express.Router()
const logger = ExpressLogger.getInstance()

// eslint-disable-next-line
router.get('/success/:logLevel', (req: Request, res: Response, next: NextFunction) => {
  logger[req.params.logLevel](`Mensaje de tipo ${req.params.logLevel}`)
  res.status(200).send('ok')
})

// eslint-disable-next-line
router.get('/error', (req: Request, res: Response, next: NextFunction) => {
  logger.error('[local] error from src/routes/application.ts')
  throw new Error('some error')
})

export default router

Archivo server.ts

import express, { NextFunction, Request, Response } from 'express'
import { ExpressLogger, printLogo, printInfo, printRoutes } from '@elartedelcodigo/express-logger'
import router from './src/routes/application'

export const app = express()

ExpressLogger.initialize(app, {
  appName: 'test-backend',
  logPath: '/tmp/log',
})

const logger = ExpressLogger.getInstance()

app.use((req: Request, res: Response, next: NextFunction) => {
  logger.trace(`${req.method} ${req.originalUrl}`)
  return next()
})

// eslint-disable-next-line
app.get('/', (req: Request, res: Response, next: NextFunction) => {
  logger.info('ok')
  res.status(200).send('ok')
})

// api routes
app.use('/api', router)

// eslint-disable-next-line
app.use((err: Error, req: Request, res: Response, next: NextFunction) => {
  logger.error(err)
  res.status(500).send('error')
})

printRoutes(app)
printLogo()
printInfo({
  name: 'test-backend',
  version: '1.0.0',
  env: 'development',
  port: '3333',
})

app.listen(3333, () => {
  process.stdout.write(`App running on port ${3333}\n`)
})

Resultado 1: Al ejecutar la aplicación

Resultado 2: Al realizar algunas peticiones

Resultado 3:

Se habrán creado los siguientes archivos: error.log, info.log y warn.log.

/tmp
  ├─ log
        └─ test-backend
              ├─ error.log
              ├─ info.log
              └─ warn.log

Contenido del archivo: info.log

{"level":30,"time":"2023-04-28T00:41:33.936Z","pid":21195,"hostname":"server","name":"test-backend","context":"print-routes.ts:14:1","msg":"Cargando aplicación..."}
{"level":30,"time":"2023-04-28T00:41:33.941Z","pid":21195,"hostname":"server","name":"test-backend","context":"print-info.ts:17:1","msg":"test-backend v1.0.0"}
{"level":30,"time":"2023-04-28T00:41:35.974Z","pid":21195,"hostname":"server","name":"test-backend","reqId":"6e117330-e55d-11ed-ae62-f1c38d6314d3","context":"server.ts:21:1","msg":"ok"}
{"level":30,"time":"2023-04-28T00:41:35.977Z","pid":21195,"hostname":"server","name":"test-backend","request":{"id":"6e117330-e55d-11ed-ae62-f1c38d6314d3","method":"GET","url":"/"},"response":{"statusCode":200},"response time [ms]":5,"msg":"Petición concluida - 200"}
{"level":30,"time":"2023-04-28T00:41:36.988Z","pid":21195,"hostname":"server","name":"test-backend","reqId":"6eac53a0-e55d-11ed-ae62-f1c38d6314d3","context":"application.ts:9:3","msg":"Mensaje de tipo info"}
...

Opciones de configuración