Transparent HTTP proxy server in Go

go.mod

module goproxy

go 1.17

require (
	github.com/elazarl/goproxy v0.0.0-20220115173737-adb46da277ac
	github.com/elazarl/goproxy/ext v0.0.0-20220115173737-adb46da277ac
)

main.go

package main

import (
	"flag"
	"log"
	"net/http"

	"github.com/elazarl/goproxy"
	"github.com/elazarl/goproxy/ext/auth"
)

func main() {
	addr := flag.String("addr", ":29100", "Listen address")
	username := flag.String("username", "", "Username")
	password := flag.String("password", "", "Password")
	flag.Parse()

	proxy := goproxy.NewProxyHttpServer()
	proxy.Verbose = true
	auth.ProxyBasic(proxy, "csi", func(u, p string) bool {
		return u == *username && p == *password
	})
	proxy.OnRequest()
	log.Fatal(http.ListenAndServe(*addr, proxy))
}