pino-http

High-speed HTTP logger for Node.js

To our knowledge, pino-http is the fastest HTTP logger in town.

Installation
Usage
Benchmarks
API
Team
Acknowledgements
License

Benchmarks

Benchmarks log each request/response pair while returning 'hello world', using autocannon with 100 connections and 10 pipelined requests.

http-ndjson (equivalent info): 7730.73 req/sec
http-ndjson (standard minimum info): 9522.37 req/sec
pino-http: 21496 req/sec
pino-http (extreme): 25770.91 req/sec
no logger: 46139.64 req/sec

All benchmarks where taken on a Macbook Pro 2013 (2.6GHZ i7, 16GB of RAM).

Install

npm i pino-http --save

Example

'use strict'

var http = require('http')
var server = http.createServer(handle)

var logger = require('pino-http')()

function handle (req, res) {
  logger(req, res)
  req.log.info('something else')
  res.end('hello world')
}

server.listen(3000)

$ node example.js | pino
[2016-03-31T16:53:21.079Z] INFO (46316 on MBP-di-Matteo): something else
    req: {
      "id": 1,
      "method": "GET",
      "url": "/",
      "headers": {
        "host": "localhost:3000",
        "user-agent": "curl/7.43.0",
        "accept": "*/*"
      },
      "remoteAddress": "::1",
      "remotePort": 64386
    }
[2016-03-31T16:53:21.087Z] INFO (46316 on MBP-di-Matteo): request completed
    res: {
      "statusCode": 200,
      "header": "HTTP/1.1 200 OK\r\nX-Powered-By: restify\r\nContent-Type: text/html; charset=utf-8\r\nContent-Length: 11\r\nETag: W/\"b-XrY7u+Ae7tCTyyK7j1rNww\"\r\nDate: Thu, 31 Mar 2016 16:53:21 GMT\r\nConnection: keep-alive\r\n\r\n"
    }
    responseTime: 10
    req: {
      "id": 1,
      "method": "GET",
      "url": "/",
      "headers": {
        "host": "localhost:3000",
        "user-agent": "curl/7.43.0",
        "accept": "*/*"
      },
      "remoteAddress": "::1",
      "remotePort": 64386
    }

API

pinoHttp([opts], [stream])

opts: it has all the options as pino and

logger: pino-http can reuse a pino instance if passed with the logger property
genReqId: you can pass a function which gets used to generate a request id. The first argument is the request itself. As fallback pino-http is just using an integer. This default might not be the desired behavior if you're running multiple instances of the app
useLevel: the logger level pino-http is using to log out the response. default: info
stream: same as the second parameter

stream: the destination stream. Could be passed in as an option too.

Examples

Logger options

'use strict'

var http = require('http')
var server = http.createServer(handle)
var pino = require('pino')()
var logger = require('pino-http')({
  // Reuse an existing logger instance
  logger: pino,

  // Define a custom request id function
  genReqId: function (req) { return req.id },

  // Define custom serializers
  serializers: {
    req: pino.stdSerializers.req,
    res: pino.stdSerializers.res
  },

  // Logger level is `info` by default
  useLevel: 'info'
})

function handle (req, res) {
  logger(req, res)
  req.log.info('something else')
  res.end('hello world')
}

server.listen(3000)

Default serializers

pinoHttp.stdSerializers.req

Generates a JSONifiable object from the HTTP request object passed to the createServer callback of Node's HTTP server.

It returns an object in the form:

{
  pid: 93535,
  hostname: 'your host',
  level: 30,
  msg: 'my request',
  time: '2016-03-07T12:21:48.766Z',
  v: 0,
  req: {
    id: 42,
    method: 'GET',
    url: '/',
    headers: {
      host: 'localhost:50201',
      connection: 'close'
    },
    remoteAddress: '::ffff:127.0.0.1',
    remotePort: 50202
  }
}

pinoHttp.stdSerializers.res

Generates a JSONifiable object from the HTTP response object passed to the createServer callback of Node's HTTP server.

It returns an object in the form:

{
  pid: 93581,
  hostname: 'myhost',
  level: 30,
  msg: 'my response',
  time: '2016-03-07T12:23:18.041Z',
  v: 0,
  res: {
    statusCode: 200,
    header: 'HTTP/1.1 200 OK\r\nDate: Mon, 07 Mar 2016 12:23:18 GMT\r\nConnection: close\r\nContent-Length: 5\r\n\r\n'
  }
}