This simple application is made to inspect the request sent to other webservers

httpinspect.go

package main

// This simple application is made to inspect the request sent to other
// webservers. Simply edit your hosts file and point the address to your IP.
// You must be root to use port 80.
// Don't forget to: go get -u github.com/valyala/fasthttp

import (
	"flag"
	"fmt"
	"log"

	"github.com/valyala/fasthttp"
)

var (
	addr = flag.String("addr", ":8080", "TCP address to listen to")
)

func main() {
	flag.Parse()

	log.Printf("Starting HTTP server on %q", *addr)
	go func() {
		if err := fasthttp.ListenAndServe(*addr, requestHandler); err != nil {
			log.Fatalf("error in ListenAndServe: %s", err)
		}
	}()

	select {}
}

func requestHandler(ctx *fasthttp.RequestCtx) {
	fmt.Println(fmt.Sprintf("---RAW---\n%s\n---/RAW---", &ctx.Request))

	ctx.SetContentType("text/plain; charset=utf8")
	fmt.Fprintln(ctx, "Ok")
}