express-logs

An express log middleware which add a logs object to request

Usage

$ npm i express-logs -S

Example

const express = require('express')
const app = express() 
app.use(require('express-logs')())

app.get('/', (req, res, next) => {
  req.logs.log('Request start.')
  
  setTimeout(() => {
    req.logs.error('Ooops, Something\'s wrong')
  }, 1000)
  
  someMethod.call(req)
  
  req.logs.time('slowOperation')
  setTimeout(() => {
    req.logs.timeEnd('slowOperation')
    res.sendStatus(200)
  }, 5000)
}) 

function someMethod() {
  this.logs.log('In method log')
}

will print something like below

----------
[2016-09-21T14:27:41.294Z] Request start.
[2016-09-21T14:27:41.296Z] In method log
[2016-09-21T14:27:42.297Z] Ooops, Something's; wrong
[2016-09-21T14:27:42.298Z] slowOperation done, using 1001ms
[2016-09-21T14:27:42.308Z] Request done using 1015ms

All logs will be printed AFTER the request is end.

It's a lot more convenient for debug、performance monitor in this way instead of print log immediately.

Options

{
  format: [String], // default is 'YYYY-MM-DD HH:mm:ss.SSS', could be any valid format for momentjs
  requestTiming: [Boolean] // default is true
}