[[:oktatas:web:back-end_framework:express|< Express]]

====== Express - Naplózás ======

  * **Szerző:** Sallai András
  * Copyright (c) 2023, Sallai András
  * Szerkesztve: 2024
  * Licenc: [[https://creativecommons.org/licenses/by-sa/4.0/|CC Attribution-Share Alike 4.0 International]]
  * Web: https://szit.hu

===== Morgan =====

Webhely:
  * https://www.npmjs.com/package/morgan (2023)

  pnpm install morgan

<code javascript src/api.js>
const Router = require('express')
const router = new Router()

router.get('/msg', (req, res) => {
    res.json({msg: 'Működik'})
})

module.exports = router
</code>

<code javascript src/index.js>
const express = require('express')
const app = express()
const morgan = require('morgan')
const router = require('./api')

app.use(morgan('dev'))

app.use('/api', router)
 
app.listen(8000, () => {
    console.log('Listening on port: 8000')
})

</code>


Paraméterként megadható:
  * combined
  * dev
  * short
  * tiny


===== Írás fájlba =====

<code javascript app/api.js>
const Router = require('express')
const router = new Router()

router.get('/msg', (req, res) => {
    res.json({msg: 'Működik'})
})

module.exports = router
</code>


<code javascript app/index.js>
const express = require('express')
const morgan = require('morgan')
const app = express()
const fs = require('fs')
const path = require('path')
const router = require('./api')

const logfile = 'access.log'
var accessLogStream = fs.createWriteStream(logfile, { flags: 'a' })
app.use(morgan('dev', { stream: accessLogStream }))

app.use('/api', router);
 
app.listen(8000, () => {
    console.log('Listening on port: 8000')
})
</code>


Ha az index.js fájl mellé szeretnénk:
<code javascript>
var logfile = path.join(__dirname, 'access.log')
</code>