golang 生成token并解析

生成Token：

package main

import (
    "fmt"
    "time"
    "github.com/dgrijalva/jwt-go"
)

func main() {
    // set token claims
    claims := jwt.MapClaims{}
    claims["authorized"] = true
    claims["user_id"] = "1234"
    claims["exp"] = time.Now().Add(time.Hour * 24).Unix()

    // create token with claims
    token := jwt.NewWithClaims(jwt.SigningMethodHS256, claims)

    // set secret key
    secret := "my_secret_key"

    // sign token with secret key
    signedToken, err := token.SignedString([]byte(secret))
    if err != nil {
        fmt.Println(err)
        return
    }

    fmt.Println(signedToken)
}

解析Token：

package main

import (
    "fmt"
    "github.com/dgrijalva/jwt-go"
)

func main() {
    // set secret key
    secret := "my_secret_key"

    // sample token string
    tokenString := "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJhdWQiOiJ0ZXN0IiwidXNlcl9pZCI6IjEyMzQiLCJleHAiOjE2MTUzODIwMzN9.P4nJ6UdLjUkC6BVmTQlJm6jKBO6wZKmJnR_8gCJb9XQ"

    // parse token
    token, err := jwt.Parse(tokenString, func(token *jwt.Token) (interface{}, error) {
        // validate signing method
        if _, ok := token.Method.(*jwt.SigningMethodHMAC); !ok {
            return nil, fmt.Errorf("unexpected signing method: %v", token.Header["alg"])
        }

        // return secret key
        return []byte(secret), nil
    })
    if err != nil {
        fmt.Println(err)
        return
    }

    // validate token claims
    if claims, ok := token.Claims.(jwt.MapClaims); ok && token.Valid {
        fmt.Println(claims["authorized"], claims["user_id"])
    } else {
        fmt.Println(err)
    }
}