On the fly GZIP encoding for static files with negroni GZIP handler.

negroni-gzip-test.go

package main

import (
	"fmt"
	"github.com/codegangsta/negroni"
	"github.com/phyber/negroni-gzip/gzip"
	"net/http"
)

func MyMiddleware(rw http.ResponseWriter, r *http.Request, next http.HandlerFunc) {
	fmt.Println("right before -->")
	// do some stuff before
	next(rw, r)
	// do some stuff after
	fmt.Println("right after <--")
}

func main() {
	mux := http.NewServeMux()
	mux.HandleFunc("/", func(w http.ResponseWriter, req *http.Request) {
		fmt.Fprintf(w, "Hello World!")
	})

	// Create an empty instance with no middleware preconfigured.
	n := negroni.New()

	n.Use(negroni.NewLogger())

	// Add the GZIP compression handler.
	// Test with: curl  -H "Accept-Encoding: gzip" -v localhost:3000/
	n.Use(gzip.Gzip(gzip.DefaultCompression))
	// Content produced by every handler after the GZIP handler is compressed.

	// Serve static files from './public'
	n.Use(negroni.NewStatic(http.Dir("public")))
	n.Use(negroni.HandlerFunc(MyMiddleware))
	// ... Add any other middlware here

	// add the router as the last handler in the stack
	n.UseHandler(mux)
	n.Run(":3000")
}