jwt-app.go

package main

import (
	"fmt"
	"net/http"
	"time"

	"github.com/dgrijalva/jwt-go"
)

var jwtKey = []byte("my_secret_key")

type Claims struct {
	Username string
	jwt.StandardClaims
}

func HelloServer(w http.ResponseWriter, r *http.Request) {
	expirationTime := time.Now().Add(5 * time.Minute)
	claims := &Claims{
		Username: "a1b2c3",
		StandardClaims: jwt.StandardClaims{
			ExpiresAt: expirationTime.Unix(),
		},
	}

	token := jwt.NewWithClaims(jwt.SigningMethodHS256, claims)
	tokenString, _ := token.SignedString(jwtKey)
	fmt.Fprintf(w, tokenString)
}

func main() {
	http.HandleFunc("/", HelloServer)
	http.ListenAndServe(":8080", nil)
}