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| package jwt
import (
"errors"
"fmt"
"log"
"net/http"
"time"
"github.com/golang-jwt/jwt/v5"
"github.com/gin-gonic/gin"
)
func JWTAuth() gin.HandlerFunc {
return func(c *gin.Context) {
token := c.Request.Header.Get("token")
if token == "" {
c.JSON(http.StatusOK, gin.H{
"status": -1,
"msg": "请求未携带token无权限访问",
})
c.Abort()
return
}
log.Print("get token: ", token)
j := NewJWT()
claims, err := j.ParseToken(token)
fmt.Println("claims", claims)
if err != nil {
if err == TokenExpired {
c.JSON(http.StatusOK, gin.H{
"status": -1,
"msg": "授权已过期",
})
c.Abort()
return
}
c.JSON(http.StatusOK, gin.H{
"status": -1,
"msg": err.Error(),
})
c.Abort()
return
}
c.Set("claims", claims)
}
}
type JWT struct {
SigningKey []byte
}
var (
TokenExpired error = errors.New("Token is expired")
TokenNotValidYet error = errors.New("Token not active yet")
TokenMalformed error = errors.New("That's not even a token")
TokenInvalid error = errors.New("Couldn't handle this token:")
SignKey string = "newtrekWang"
)
type CustomClaims struct {
ID int `json:"userId"`
Name string `json:"name"`
Password string `json:"password"`
jwt.RegisteredClaims
}
func NewJWT() *JWT {
return &JWT{
[]byte(GetSignKey()),
}
}
func GetSignKey() string {
return SignKey
}
func SetSignKey(key string) string {
SignKey = key
return SignKey
}
func (j *JWT) CreateToken(claims CustomClaims) (string, error) {
token := jwt.NewWithClaims(jwt.SigningMethodHS256, claims)
return token.SignedString(j.SigningKey)
}
func (j *JWT) ParseToken(tokenString string) (*CustomClaims, error) {
token, err := jwt.ParseWithClaims(tokenString, &CustomClaims{}, func(token *jwt.Token) (interface{}, error) {
return j.SigningKey, nil
})
if err != nil {
return nil, err
}
if claims, ok := token.Claims.(*CustomClaims); ok && token.Valid {
return claims, nil
}
return nil, TokenInvalid
}
func (j *JWT) RefreshToken(tokenString string) (string, error) {
token, err := jwt.ParseWithClaims(tokenString, &CustomClaims{}, func(token *jwt.Token) (interface{}, error) {
return j.SigningKey, nil
})
if err != nil {
return "", err
}
if claims, ok := token.Claims.(*CustomClaims); ok && token.Valid {
claims.RegisteredClaims.ExpiresAt = jwt.NewNumericDate(time.Now().Add(time.Hour * 24))
return j.CreateToken(*claims)
}
return "", TokenInvalid
}
|
