express-clean-logger

A Fast & Useful Request Logger for ExpressJS

This module outputs clean logs that outputs useful information for ExpressJS request/responses.

const express = require("express")
const app = express()

const clogger = require('express-clean-logger')
app.use(clogger())

Remember to set the logger middleware before any actual processing (including express.static()).

You can also log to a file (which will rollover every 10,000 logs)

app.use(clogger("/var/logs/myapp.log"))

The output contains all the main useful information needed:

2021-08-29 22:41:47 +20 GET /url/path 100.172.88.84 Chrome Mobile/Android/Generic Smartphone

---- date/time ---- time ---- url -------- ip ------------------- user agent ---------------
      in UTC     taken in ms

...
 2021-08-30 00:30:59 +3 GET /test/page1 ::1 curl/Other/Other
 2021-08-30 00:31:02 +0 GET /test/page2 ::1 Safari/Mac OS X/Other
 2021-08-30 00:31:12 +0 GET /about/this ::1 Chrome/Windows/Other
 2021-08-30 00:33:20 +4 GET /price/pkg ::1 Mobile Safari/iOS/iPhone

...

(on redirect)
>2021-08-30 12:30:21 +1 (301) GET /aboutme -> /gohere ::1 Chrome/Mac OS X/Other

(on error)
!2021-08-30 12:38:17 +2 (404) GET /gohere ::1 Chrome/Mac OS X/Other > error sent
...

Additional Info

When the response is an error, any error res.sent() back to the user will also be added to the log. If you would like to specifically add details to the log set the res.cl_msg field on the response and it will be logged out:

res.cl_msg = "some details"

Echoing

If you want to echo the output along with writing to the file provide the {echo: true} parameter:

app.use(clogger("/var/logs/myapp.log", { echo: true }))

Enjoy!