GOKRB5 Handler

// +build examples

package main

import (
	"encoding/hex"
	"fmt"
	"log"
	"net/http"
	"os"

	goidentity "gopkg.in/jcmturner/goidentity.v3"
	"gopkg.in/jcmturner/gokrb5.v6/keytab"
	"gopkg.in/jcmturner/gokrb5.v6/service"
	"gopkg.in/jcmturner/gokrb5.v6/testdata"
)

const (
	port = ":9080"
)

func main() {
	//defer profile.Start(profile.TraceProfile).Stop()
	// Create logger
	l := log.New(os.Stderr, "GOKRB5 Service: ", log.Ldate|log.Ltime|log.Lshortfile)

	// Load the service's keytab
	b, _ := hex.DecodeString(testdata.HTTP_KEYTAB)
	kt, _ := keytab.Parse(b)

	// Create the application's specific handler
	th := http.HandlerFunc(testAppHandler)

	// Set up handler mappings wrapping in the SPNEGOKRB5Authenticate handler wrapper
	mux := http.NewServeMux()
	c := service.NewConfig(kt)
	mux.Handle("/", service.SPNEGOKRB5Authenticate(th, c, l))

	// Start up the web server
	log.Fatal(http.ListenAndServe(port, mux))
}

// Simple application specific handler
func testAppHandler(w http.ResponseWriter, r *http.Request) {
	w.WriteHeader(http.StatusOK)
	ctx := r.Context()
	creds := ctx.Value(service.CTXKeyCredentials).(goidentity.Identity)
	fmt.Fprintf(w,
		`<html>
<h1>GOKRB5 Handler</h1>
<ul>
<li>Authenticed user: %s</li>
<li>User's realm: %s</li>
<li>Authn time: %v</li>
<li>Session ID: %s</li>
<ul>
</html>`,
		creds.UserName(),
		creds.Domain(),
		creds.AuthTime(),
		creds.SessionID(),
	)
	return
}