loghandler

The default Go HTTP handler doesn't do any logging. This is a handler middleware package that logs to an io.Writer and StatsD (optionally).

go get github.com/Hebo/loghandler

loghandler is based on Gorilla's handler code, and adds support for StatsD and tracking request duration.

Example Output

199.9.252.10 - - [03/Feb/2014:16:32:41 -0800] "GET /validate HTTP/1.1" 200 239 (2424μs)
199.9.250.239 - - [03/Feb/2014:16:32:41 -0800] "GET /validate HTTP/1.1" 200 244 (2490μs)
199.9.252.10 - - [03/Feb/2014:16:32:41 -0800] "GET /validate HTTP/1.1" 200 235 (3024μs)

Getting Started

package main

import (
        "fmt"
        "log"
        "net/http"
        "os"
        "time"

        "github.com/Hebo/loghandler"
)

func main() {
        http.HandleFunc("/dowork", func(w http.ResponseWriter, r *http.Request) {
                // Set statsd stat name
                loghandler.SetStat(w, "do.work")
                time.Sleep(300 * time.Millisecond)
                fmt.Fprintf(w, "Hello!")
        })

        // Wrap default handler and serve that instead
        handler := loghandler.NewLoggingHandler(os.Stdout, nil, http.DefaultServeMux)

        if err := http.ListenAndServe(":8080", handler); err != nil {
                log.Fatalf("Could not start server: %s", err.Error())
        }
}

To add stats support, simply change the nil in NewLoggingHandler to something that implements StatsLogger.

So Easy!