Serve a part of your filesystem while password protecting it.

filer.go

// Copyright (c) 2014, Ben Morgan. All rights reserved.
// Use of this source code is governed by an MIT license
// that can be found in the LICENSE file.

package main

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

	"github.com/goji/httpauth"
)

var (
	listen   = flag.String("http", "localhost:34537", "listen on this address")
	username = flag.String("user", "nobody", "username for authentication")
	password = flag.String("pass", "", "password for authentication")
)

func main() {
	flag.Parse()

	root := "."
	if flag.NArg() == 1 {
		root = flag.Arg(0)
	}
	log.Printf("Serving filesystem at %s.", root)

	var handler http.Handler
	if *username != "" && *password != "" {
		log.Printf("Requiring authentication as %s.", *username)
		handler = httpauth.SimpleBasicAuth(*username, *password)(http.FileServer(http.Dir(root)))
	} else {
		log.Println("Warning: no authentication required.")
		handler = http.FileServer(http.Dir(root))
	}

	log.Printf("Listening on %s...", *listen)
	log.Fatal(http.ListenAndServe(*listen, handler))
}