vma / logger

Logger middlewares in CommonLog and CombinedLog formats for presly/chi router

Description

logger is a http request logger for the pressly/chi go HTTP router.

It comes with CommonLogger and CombinedLogger middlewares wich logs the requests in Apache CommonLoger and CombinedLogger format respectively.

These middlewares are ported from gorilla handlers

Installation

Installation can be done as usual:

$ go get github.com/vma/logger

Usage

package main

import (
    "net/http"

    "github.com/pressly/chi"
    "github.com/vma/logger"
)

func main() {
    r := chi.NewRouter()

    r.Use(logger.CombinedLogger(os.Stdout))
    r.Get("/", func(w http.ResponseWriter, r *http.Request) {
        w.Write([]byte("Hello, World!\n"))
    })
    http.ListenAndServe(":3000", r)
}

This code will produce a log line like this one:

::1 - - [02/Jan/2017:20:07:27 +0100] "GET / HTTP/1.1" 200 13 0.012ms "" "curl/7.51.0"

You wil notice the additional answer time field. The difference with the CommonLog format is that the latter does not contain the two last fields (referrer and user agent)

The full explanation of the log formats can be found at http://stackoverflow.com/a/9234855

The CombinedLogger and CommonLogger functions accept an io.Writer parameter so, you can easily write to a file instead of stdout.