https://pkg.go.dev/github.com/golang-jwt/jwt#section-readme
    基本用法

    1. package main
    3. import (
    4.     "fmt"
    5.     "github.com/dgrijalva/jwt-go"
    6.     "log"
    7.     "time"
    8. )
    10. var (
    11. //signKey    []byte
    12. //serverPort int
    13. )
    15. func fatal(err error) {
    16.     if err != nil {
    17.         log.Fatal(err)
    18.     }
    19. }
    21. // Define some custom types were going to use within our tokens
    22. type CustomerInfo struct {
    23.     Name string
    24.     Age  int
    25. }
    27. const secrect = "hello"
    29. func CreateToken(customer *CustomerInfo) (token string, err error) {
    30.     withClaims := jwt.NewWithClaims(jwt.SigningMethodHS256, jwt.MapClaims{
    31.         "name":      customer.Name,
    32.         "age":       customer.Age,
    33.         "ExpiresAt": time.Now().Add(time.Hour * 24).Unix(),
    34.     })
    35.     return withClaims.SignedString([]byte(secrect))
    36. }
    38. func ParseToken(token string) (customer *CustomerInfo, err error) {
    39.     customer = &CustomerInfo{}
    40.     parse, err := jwt.Parse(token, func(token *jwt.Token) (interface{}, error) {
    41.         return []byte(secrect), nil
    42.     })
    43.     if err != nil {
    44.         fmt.Println("错误", err)
    45.     }
    46.     claims := parse.Claims.(jwt.MapClaims)
    47.     if !parse.Valid {
    48.         fmt.Println("token被修改过")
    49.     }
    50.     customer.Name = claims["name"].(string)
    51.     customer.Age = int(claims["age"].(float64))
    52.     return
    53. }
    55. func main() {
    56.     token, err := CreateToken(&CustomerInfo{Name: "zhangsan", Age: 18})
    57.     fatal(err)
    58.     fmt.Println(token)
    59.     parseToken, err := ParseToken("eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXRSJ9.eyJFeHBpcmVzQXQiOjE2NDg3MDM5NDIsImFnZSI6MTgsIm5hbWUiOiJ6aGFuZ3NhbiJ9.3co1PK7Vj_A551HEF-Vv0wwaSaDwKRlxz-kBFPk57lE")
    60.     fatal(err)
    61.     fmt.Println(parseToken)
    63. }